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1 | /* | ||
2 | * MPEG-4 decoder | ||
3 | * Copyright (c) 2000,2001 Fabrice Bellard | ||
4 | * Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at> | ||
5 | * | ||
6 | * This file is part of FFmpeg. | ||
7 | * | ||
8 | * FFmpeg is free software; you can redistribute it and/or | ||
9 | * modify it under the terms of the GNU Lesser General Public | ||
10 | * License as published by the Free Software Foundation; either | ||
11 | * version 2.1 of the License, or (at your option) any later version. | ||
12 | * | ||
13 | * FFmpeg is distributed in the hope that it will be useful, | ||
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
16 | * Lesser General Public License for more details. | ||
17 | * | ||
18 | * You should have received a copy of the GNU Lesser General Public | ||
19 | * License along with FFmpeg; if not, write to the Free Software | ||
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
21 | */ | ||
22 | |||
23 | #define UNCHECKED_BITSTREAM_READER 1 | ||
24 | |||
25 | #include "config_components.h" | ||
26 | |||
27 | #include "libavutil/avassert.h" | ||
28 | #include "libavutil/internal.h" | ||
29 | #include "libavutil/opt.h" | ||
30 | #include "libavutil/thread.h" | ||
31 | #include "codec_internal.h" | ||
32 | #include "error_resilience.h" | ||
33 | #include "hwconfig.h" | ||
34 | #include "idctdsp.h" | ||
35 | #include "mpegutils.h" | ||
36 | #include "mpegvideo.h" | ||
37 | #include "mpegvideodata.h" | ||
38 | #include "mpegvideodec.h" | ||
39 | #include "mpegvideo_unquantize.h" | ||
40 | #include "mpeg4video.h" | ||
41 | #include "mpeg4videodata.h" | ||
42 | #include "mpeg4videodec.h" | ||
43 | #include "mpeg4videodefs.h" | ||
44 | #include "h263.h" | ||
45 | #include "h263data.h" | ||
46 | #include "h263dec.h" | ||
47 | #include "internal.h" | ||
48 | #include "profiles.h" | ||
49 | #include "qpeldsp.h" | ||
50 | #include "threadprogress.h" | ||
51 | #include "unary.h" | ||
52 | |||
53 | #if 0 //3IV1 is quite rare and it slows things down a tiny bit | ||
54 | #define IS_3IV1 (s->codec_tag == AV_RL32("3IV1")) | ||
55 | #else | ||
56 | #define IS_3IV1 0 | ||
57 | #endif | ||
58 | |||
59 | /* The defines below define the number of bits that are read at once for | ||
60 | * reading vlc values. Changing these may improve speed and data cache needs | ||
61 | * be aware though that decreasing them may need the number of stages that is | ||
62 | * passed to get_vlc* to be increased. */ | ||
63 | #define SPRITE_TRAJ_VLC_BITS 6 | ||
64 | #define DC_VLC_BITS 9 | ||
65 | #define MB_TYPE_B_VLC_BITS 4 | ||
66 | #define STUDIO_INTRA_BITS 9 | ||
67 | |||
68 | static VLCElem dc_lum[512], dc_chrom[512]; | ||
69 | static VLCElem sprite_trajectory[128]; | ||
70 | static VLCElem mb_type_b_vlc[16]; | ||
71 | static const VLCElem *studio_intra_tab[12]; | ||
72 | static VLCElem studio_luma_dc[528]; | ||
73 | static VLCElem studio_chroma_dc[528]; | ||
74 | |||
75 | static const uint8_t mpeg4_block_count[4] = { 0, 6, 8, 12 }; | ||
76 | |||
77 | static const int16_t mb_type_b_map[4] = { | ||
78 | MB_TYPE_DIRECT2 | MB_TYPE_BIDIR_MV, | ||
79 | MB_TYPE_BIDIR_MV | MB_TYPE_16x16, | ||
80 | MB_TYPE_BACKWARD_MV | MB_TYPE_16x16, | ||
81 | MB_TYPE_FORWARD_MV | MB_TYPE_16x16, | ||
82 | }; | ||
83 | |||
84 | 1521100 | static inline Mpeg4DecContext *h263_to_mpeg4(H263DecContext *h) | |
85 | { | ||
86 | av_assert2(h->c.codec_id == AV_CODEC_ID_MPEG4 && h->c.avctx->priv_data == h); | ||
87 | 1521100 | return (Mpeg4DecContext*)h; | |
88 | } | ||
89 | |||
90 | ✗ | static void gmc1_motion(MpegEncContext *s, const Mpeg4DecContext *ctx, | |
91 | uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, | ||
92 | uint8_t *const *ref_picture) | ||
93 | { | ||
94 | const uint8_t *ptr; | ||
95 | int src_x, src_y, motion_x, motion_y; | ||
96 | ptrdiff_t offset, linesize, uvlinesize; | ||
97 | ✗ | int emu = 0; | |
98 | |||
99 | ✗ | motion_x = ctx->sprite_offset[0][0]; | |
100 | ✗ | motion_y = ctx->sprite_offset[0][1]; | |
101 | ✗ | src_x = s->mb_x * 16 + (motion_x >> (ctx->sprite_warping_accuracy + 1)); | |
102 | ✗ | src_y = s->mb_y * 16 + (motion_y >> (ctx->sprite_warping_accuracy + 1)); | |
103 | ✗ | motion_x *= 1 << (3 - ctx->sprite_warping_accuracy); | |
104 | ✗ | motion_y *= 1 << (3 - ctx->sprite_warping_accuracy); | |
105 | ✗ | src_x = av_clip(src_x, -16, s->width); | |
106 | ✗ | if (src_x == s->width) | |
107 | ✗ | motion_x = 0; | |
108 | ✗ | src_y = av_clip(src_y, -16, s->height); | |
109 | ✗ | if (src_y == s->height) | |
110 | ✗ | motion_y = 0; | |
111 | |||
112 | ✗ | linesize = s->linesize; | |
113 | ✗ | uvlinesize = s->uvlinesize; | |
114 | |||
115 | ✗ | ptr = ref_picture[0] + src_y * linesize + src_x; | |
116 | |||
117 | ✗ | if ((unsigned)src_x >= FFMAX(s->h_edge_pos - 17, 0) || | |
118 | ✗ | (unsigned)src_y >= FFMAX(s->v_edge_pos - 17, 0)) { | |
119 | ✗ | s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr, | |
120 | linesize, linesize, | ||
121 | 17, 17, | ||
122 | src_x, src_y, | ||
123 | s->h_edge_pos, s->v_edge_pos); | ||
124 | ✗ | ptr = s->sc.edge_emu_buffer; | |
125 | } | ||
126 | |||
127 | ✗ | if ((motion_x | motion_y) & 7) { | |
128 | ✗ | ctx->mdsp.gmc1(dest_y, ptr, linesize, 16, | |
129 | ✗ | motion_x & 15, motion_y & 15, 128 - s->no_rounding); | |
130 | ✗ | ctx->mdsp.gmc1(dest_y + 8, ptr + 8, linesize, 16, | |
131 | ✗ | motion_x & 15, motion_y & 15, 128 - s->no_rounding); | |
132 | } else { | ||
133 | int dxy; | ||
134 | |||
135 | ✗ | dxy = ((motion_x >> 3) & 1) | ((motion_y >> 2) & 2); | |
136 | ✗ | if (s->no_rounding) { | |
137 | ✗ | s->hdsp.put_no_rnd_pixels_tab[0][dxy](dest_y, ptr, linesize, 16); | |
138 | } else { | ||
139 | ✗ | s->hdsp.put_pixels_tab[0][dxy](dest_y, ptr, linesize, 16); | |
140 | } | ||
141 | } | ||
142 | |||
143 | if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY) | ||
144 | return; | ||
145 | |||
146 | ✗ | motion_x = ctx->sprite_offset[1][0]; | |
147 | ✗ | motion_y = ctx->sprite_offset[1][1]; | |
148 | ✗ | src_x = s->mb_x * 8 + (motion_x >> (ctx->sprite_warping_accuracy + 1)); | |
149 | ✗ | src_y = s->mb_y * 8 + (motion_y >> (ctx->sprite_warping_accuracy + 1)); | |
150 | ✗ | motion_x *= 1 << (3 - ctx->sprite_warping_accuracy); | |
151 | ✗ | motion_y *= 1 << (3 - ctx->sprite_warping_accuracy); | |
152 | ✗ | src_x = av_clip(src_x, -8, s->width >> 1); | |
153 | ✗ | if (src_x == s->width >> 1) | |
154 | ✗ | motion_x = 0; | |
155 | ✗ | src_y = av_clip(src_y, -8, s->height >> 1); | |
156 | ✗ | if (src_y == s->height >> 1) | |
157 | ✗ | motion_y = 0; | |
158 | |||
159 | ✗ | offset = (src_y * uvlinesize) + src_x; | |
160 | ✗ | ptr = ref_picture[1] + offset; | |
161 | ✗ | if ((unsigned)src_x >= FFMAX((s->h_edge_pos >> 1) - 9, 0) || | |
162 | ✗ | (unsigned)src_y >= FFMAX((s->v_edge_pos >> 1) - 9, 0)) { | |
163 | ✗ | s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr, | |
164 | uvlinesize, uvlinesize, | ||
165 | 9, 9, | ||
166 | src_x, src_y, | ||
167 | ✗ | s->h_edge_pos >> 1, s->v_edge_pos >> 1); | |
168 | ✗ | ptr = s->sc.edge_emu_buffer; | |
169 | ✗ | emu = 1; | |
170 | } | ||
171 | ✗ | ctx->mdsp.gmc1(dest_cb, ptr, uvlinesize, 8, | |
172 | ✗ | motion_x & 15, motion_y & 15, 128 - s->no_rounding); | |
173 | |||
174 | ✗ | ptr = ref_picture[2] + offset; | |
175 | ✗ | if (emu) { | |
176 | ✗ | s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr, | |
177 | uvlinesize, uvlinesize, | ||
178 | 9, 9, | ||
179 | src_x, src_y, | ||
180 | ✗ | s->h_edge_pos >> 1, s->v_edge_pos >> 1); | |
181 | ✗ | ptr = s->sc.edge_emu_buffer; | |
182 | } | ||
183 | ✗ | ctx->mdsp.gmc1(dest_cr, ptr, uvlinesize, 8, | |
184 | ✗ | motion_x & 15, motion_y & 15, 128 - s->no_rounding); | |
185 | } | ||
186 | |||
187 | ✗ | static void gmc_motion(MpegEncContext *s, const Mpeg4DecContext *ctx, | |
188 | uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, | ||
189 | uint8_t *const *ref_picture) | ||
190 | { | ||
191 | const uint8_t *ptr; | ||
192 | int linesize, uvlinesize; | ||
193 | ✗ | const int a = ctx->sprite_warping_accuracy; | |
194 | int ox, oy; | ||
195 | |||
196 | ✗ | linesize = s->linesize; | |
197 | ✗ | uvlinesize = s->uvlinesize; | |
198 | |||
199 | ✗ | ptr = ref_picture[0]; | |
200 | |||
201 | ✗ | ox = ctx->sprite_offset[0][0] + ctx->sprite_delta[0][0] * s->mb_x * 16 + | |
202 | ✗ | ctx->sprite_delta[0][1] * s->mb_y * 16; | |
203 | ✗ | oy = ctx->sprite_offset[0][1] + ctx->sprite_delta[1][0] * s->mb_x * 16 + | |
204 | ✗ | ctx->sprite_delta[1][1] * s->mb_y * 16; | |
205 | |||
206 | ✗ | ctx->mdsp.gmc(dest_y, ptr, linesize, 16, | |
207 | ox, oy, | ||
208 | ✗ | ctx->sprite_delta[0][0], ctx->sprite_delta[0][1], | |
209 | ✗ | ctx->sprite_delta[1][0], ctx->sprite_delta[1][1], | |
210 | ✗ | a + 1, (1 << (2 * a + 1)) - s->no_rounding, | |
211 | s->h_edge_pos, s->v_edge_pos); | ||
212 | ✗ | ctx->mdsp.gmc(dest_y + 8, ptr, linesize, 16, | |
213 | ✗ | ox + ctx->sprite_delta[0][0] * 8, | |
214 | ✗ | oy + ctx->sprite_delta[1][0] * 8, | |
215 | ✗ | ctx->sprite_delta[0][0], ctx->sprite_delta[0][1], | |
216 | ✗ | ctx->sprite_delta[1][0], ctx->sprite_delta[1][1], | |
217 | ✗ | a + 1, (1 << (2 * a + 1)) - s->no_rounding, | |
218 | s->h_edge_pos, s->v_edge_pos); | ||
219 | |||
220 | if (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY) | ||
221 | return; | ||
222 | |||
223 | ✗ | ox = ctx->sprite_offset[1][0] + ctx->sprite_delta[0][0] * s->mb_x * 8 + | |
224 | ✗ | ctx->sprite_delta[0][1] * s->mb_y * 8; | |
225 | ✗ | oy = ctx->sprite_offset[1][1] + ctx->sprite_delta[1][0] * s->mb_x * 8 + | |
226 | ✗ | ctx->sprite_delta[1][1] * s->mb_y * 8; | |
227 | |||
228 | ✗ | ptr = ref_picture[1]; | |
229 | ✗ | ctx->mdsp.gmc(dest_cb, ptr, uvlinesize, 8, | |
230 | ox, oy, | ||
231 | ✗ | ctx->sprite_delta[0][0], ctx->sprite_delta[0][1], | |
232 | ✗ | ctx->sprite_delta[1][0], ctx->sprite_delta[1][1], | |
233 | ✗ | a + 1, (1 << (2 * a + 1)) - s->no_rounding, | |
234 | ✗ | (s->h_edge_pos + 1) >> 1, (s->v_edge_pos + 1) >> 1); | |
235 | |||
236 | ✗ | ptr = ref_picture[2]; | |
237 | ✗ | ctx->mdsp.gmc(dest_cr, ptr, uvlinesize, 8, | |
238 | ox, oy, | ||
239 | ✗ | ctx->sprite_delta[0][0], ctx->sprite_delta[0][1], | |
240 | ✗ | ctx->sprite_delta[1][0], ctx->sprite_delta[1][1], | |
241 | ✗ | a + 1, (1 << (2 * a + 1)) - s->no_rounding, | |
242 | ✗ | (s->h_edge_pos + 1) >> 1, (s->v_edge_pos + 1) >> 1); | |
243 | } | ||
244 | |||
245 | ✗ | void ff_mpeg4_mcsel_motion(MpegEncContext *s, | |
246 | uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, | ||
247 | uint8_t *const *ref_picture) | ||
248 | { | ||
249 | ✗ | const Mpeg4DecContext *const ctx = (Mpeg4DecContext*)s; | |
250 | |||
251 | ✗ | if (ctx->real_sprite_warping_points == 1) { | |
252 | ✗ | gmc1_motion(s, ctx, dest_y, dest_cb, dest_cr, | |
253 | ref_picture); | ||
254 | } else { | ||
255 | ✗ | gmc_motion(s, ctx, dest_y, dest_cb, dest_cr, | |
256 | ref_picture); | ||
257 | } | ||
258 | ✗ | } | |
259 | |||
260 | 1350 | void ff_mpeg4_decode_studio(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, | |
261 | uint8_t *dest_cr, int block_size, int uvlinesize, | ||
262 | int dct_linesize, int dct_offset) | ||
263 | { | ||
264 | 1350 | Mpeg4DecContext *const ctx = (Mpeg4DecContext*)s; | |
265 | 1350 | const int act_block_size = block_size * 2; | |
266 | |||
267 |
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1350 | if (ctx->dpcm_direction == 0) { |
268 | 667 | s->idsp.idct_put(dest_y, dct_linesize, (int16_t*)ctx->block32[0]); | |
269 | 667 | s->idsp.idct_put(dest_y + act_block_size, dct_linesize, (int16_t*)ctx->block32[1]); | |
270 | 667 | s->idsp.idct_put(dest_y + dct_offset, dct_linesize, (int16_t*)ctx->block32[2]); | |
271 | 667 | s->idsp.idct_put(dest_y + dct_offset + act_block_size, dct_linesize, (int16_t*)ctx->block32[3]); | |
272 | |||
273 | 667 | dct_linesize = uvlinesize << s->interlaced_dct; | |
274 |
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667 | dct_offset = s->interlaced_dct ? uvlinesize : uvlinesize*block_size; |
275 | |||
276 | 667 | s->idsp.idct_put(dest_cb, dct_linesize, (int16_t*)ctx->block32[4]); | |
277 | 667 | s->idsp.idct_put(dest_cr, dct_linesize, (int16_t*)ctx->block32[5]); | |
278 | 667 | s->idsp.idct_put(dest_cb + dct_offset, dct_linesize, (int16_t*)ctx->block32[6]); | |
279 | 667 | s->idsp.idct_put(dest_cr + dct_offset, dct_linesize, (int16_t*)ctx->block32[7]); | |
280 |
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667 | if (!s->chroma_x_shift){ //Chroma444 |
281 | ✗ | s->idsp.idct_put(dest_cb + act_block_size, dct_linesize, (int16_t*)ctx->block32[8]); | |
282 | ✗ | s->idsp.idct_put(dest_cr + act_block_size, dct_linesize, (int16_t*)ctx->block32[9]); | |
283 | ✗ | s->idsp.idct_put(dest_cb + act_block_size + dct_offset, dct_linesize, (int16_t*)ctx->block32[10]); | |
284 | ✗ | s->idsp.idct_put(dest_cr + act_block_size + dct_offset, dct_linesize, (int16_t*)ctx->block32[11]); | |
285 | } | ||
286 |
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683 | } else if (ctx->dpcm_direction == 1) { |
287 | 683 | uint16_t *dest_pcm[3] = {(uint16_t*)dest_y, (uint16_t*)dest_cb, (uint16_t*)dest_cr}; | |
288 | 683 | int linesize[3] = {dct_linesize, uvlinesize, uvlinesize}; | |
289 |
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2732 | for (int i = 0; i < 3; i++) { |
290 | 2049 | const uint16_t *src = ctx->dpcm_macroblock[i]; | |
291 |
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2049 | int vsub = i ? s->chroma_y_shift : 0; |
292 |
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2049 | int hsub = i ? s->chroma_x_shift : 0; |
293 | 2049 | int lowres = s->avctx->lowres; | |
294 | 2049 | int step = 1 << lowres; | |
295 |
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34833 | for (int h = 0; h < (16 >> (vsub + lowres)); h++){ |
296 |
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382480 | for (int w = 0, idx = 0; w < (16 >> (hsub + lowres)); w++, idx += step) |
297 | 349696 | dest_pcm[i][w] = src[idx]; | |
298 | 32784 | dest_pcm[i] += linesize[i] / 2; | |
299 | 32784 | src += (16 >> hsub) * step; | |
300 | } | ||
301 | } | ||
302 | } else { | ||
303 | ✗ | uint16_t *dest_pcm[3] = {(uint16_t*)dest_y, (uint16_t*)dest_cb, (uint16_t*)dest_cr}; | |
304 | ✗ | int linesize[3] = {dct_linesize, uvlinesize, uvlinesize}; | |
305 | av_assert2(ctx->dpcm_direction == -1); | ||
306 | ✗ | for (int i = 0; i < 3; i++) { | |
307 | ✗ | const uint16_t *src = ctx->dpcm_macroblock[i]; | |
308 | ✗ | int vsub = i ? s->chroma_y_shift : 0; | |
309 | ✗ | int hsub = i ? s->chroma_x_shift : 0; | |
310 | ✗ | int lowres = s->avctx->lowres; | |
311 | ✗ | int step = 1 << lowres; | |
312 | ✗ | dest_pcm[i] += (linesize[i] / 2) * ((16 >> vsub + lowres) - 1); | |
313 | ✗ | for (int h = (16 >> (vsub + lowres)) - 1; h >= 0; h--){ | |
314 | ✗ | for (int w = (16 >> (hsub + lowres)) - 1, idx = 0; w >= 0; w--, idx += step) | |
315 | ✗ | dest_pcm[i][w] = src[idx]; | |
316 | ✗ | src += step * (16 >> hsub); | |
317 | ✗ | dest_pcm[i] -= linesize[i] / 2; | |
318 | } | ||
319 | } | ||
320 | } | ||
321 | 1350 | } | |
322 | |||
323 | /** | ||
324 | * Predict the ac. | ||
325 | * @param n block index (0-3 are luma, 4-5 are chroma) | ||
326 | * @param dir the ac prediction direction | ||
327 | */ | ||
328 | 1359930 | void ff_mpeg4_pred_ac(H263DecContext *const h, int16_t *block, int n, int dir) | |
329 | { | ||
330 | int i; | ||
331 | int16_t *ac_val, *ac_val1; | ||
332 | 1359930 | int8_t *const qscale_table = h->c.cur_pic.qscale_table; | |
333 | |||
334 | /* find prediction */ | ||
335 | 1359930 | ac_val = &h->c.ac_val[0][0] + h->c.block_index[n] * 16; | |
336 | 1359930 | ac_val1 = ac_val; | |
337 |
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1359930 | if (h->c.ac_pred) { |
338 |
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30084 | if (dir == 0) { |
339 | 20713 | const int xy = h->c.mb_x - 1 + h->c.mb_y * h->c.mb_stride; | |
340 | /* left prediction */ | ||
341 | 20713 | ac_val -= 16; | |
342 | |||
343 |
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20713 | if (h->c.mb_x == 0 || h->c.qscale == qscale_table[xy] || |
344 | ✗ | n == 1 || n == 3) { | |
345 | /* same qscale */ | ||
346 |
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165704 | for (i = 1; i < 8; i++) |
347 | 144991 | block[h->c.idsp.idct_permutation[i << 3]] += ac_val[i]; | |
348 | } else { | ||
349 | /* different qscale, we must rescale */ | ||
350 | ✗ | for (i = 1; i < 8; i++) | |
351 | ✗ | block[h->c.idsp.idct_permutation[i << 3]] += ROUNDED_DIV(ac_val[i] * qscale_table[xy], h->c.qscale); | |
352 | } | ||
353 | } else { | ||
354 | 9371 | const int xy = h->c.mb_x + h->c.mb_y * h->c.mb_stride - h->c.mb_stride; | |
355 | /* top prediction */ | ||
356 | 9371 | ac_val -= 16 * h->c.block_wrap[n]; | |
357 | |||
358 |
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9371 | if (h->c.mb_y == 0 || h->c.qscale == qscale_table[xy] || |
359 |
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2 | n == 2 || n == 3) { |
360 | /* same qscale */ | ||
361 |
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74968 | for (i = 1; i < 8; i++) |
362 | 65597 | block[h->c.idsp.idct_permutation[i]] += ac_val[i + 8]; | |
363 | } else { | ||
364 | /* different qscale, we must rescale */ | ||
365 | ✗ | for (i = 1; i < 8; i++) | |
366 | ✗ | block[h->c.idsp.idct_permutation[i]] += ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], h->c.qscale); | |
367 | } | ||
368 | } | ||
369 | } | ||
370 | /* left copy */ | ||
371 |
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10879440 | for (i = 1; i < 8; i++) |
372 | 9519510 | ac_val1[i] = block[h->c.idsp.idct_permutation[i << 3]]; | |
373 | |||
374 | /* top copy */ | ||
375 |
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10879440 | for (i = 1; i < 8; i++) |
376 | 9519510 | ac_val1[8 + i] = block[h->c.idsp.idct_permutation[i]]; | |
377 | 1359930 | } | |
378 | |||
379 | /** | ||
380 | * check if the next stuff is a resync marker or the end. | ||
381 | * @return 0 if not | ||
382 | */ | ||
383 | 1510556 | static inline int mpeg4_is_resync(Mpeg4DecContext *ctx) | |
384 | { | ||
385 | 1510556 | H263DecContext *const h = &ctx->h; | |
386 | 1510556 | int bits_count = get_bits_count(&h->gb); | |
387 | 1510556 | int v = show_bits(&h->gb, 16); | |
388 | |||
389 |
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1510556 | if (h->c.workaround_bugs & FF_BUG_NO_PADDING && !ctx->resync_marker) |
390 | ✗ | return 0; | |
391 | |||
392 |
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1510556 | while (v <= 0xFF) { |
393 |
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4050 | if (h->c.pict_type == AV_PICTURE_TYPE_B || |
394 |
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3062 | (v >> (8 - h->c.pict_type) != 1) || h->partitioned_frame) |
395 | break; | ||
396 | ✗ | skip_bits(&h->gb, 8 + h->c.pict_type); | |
397 | ✗ | bits_count += 8 + h->c.pict_type; | |
398 | ✗ | v = show_bits(&h->gb, 16); | |
399 | } | ||
400 | |||
401 |
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1510556 | if (bits_count + 8 >= h->gb.size_in_bits) { |
402 | 11768 | v >>= 8; | |
403 | 11768 | v |= 0x7F >> (7 - (bits_count & 7)); | |
404 | |||
405 |
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11768 | if (v == 0x7F) |
406 | 11403 | return h->c.mb_num; | |
407 | } else { | ||
408 | static const uint16_t mpeg4_resync_prefix[8] = { | ||
409 | 0x7F00, 0x7E00, 0x7C00, 0x7800, 0x7000, 0x6000, 0x4000, 0x0000 | ||
410 | }; | ||
411 | |||
412 |
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1498788 | if (v == mpeg4_resync_prefix[bits_count & 7]) { |
413 | int len, mb_num; | ||
414 | 4138 | int mb_num_bits = av_log2(h->c.mb_num - 1) + 1; | |
415 | 4138 | GetBitContext gb = h->gb; | |
416 | |||
417 | 4138 | skip_bits(&h->gb, 1); | |
418 | 4138 | align_get_bits(&h->gb); | |
419 | |||
420 |
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72813 | for (len = 0; len < 32; len++) |
421 |
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72813 | if (get_bits1(&h->gb)) |
422 | 4138 | break; | |
423 | |||
424 | 4138 | mb_num = get_bits(&h->gb, mb_num_bits); | |
425 |
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4138 | if (!mb_num || mb_num > h->c.mb_num || get_bits_count(&h->gb) + 6 > h->gb.size_in_bits) |
426 | ✗ | mb_num= -1; | |
427 | |||
428 | 4138 | h->gb = gb; | |
429 | |||
430 |
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4138 | if (len >= ff_mpeg4_get_video_packet_prefix_length(h->c.pict_type, ctx->f_code, ctx->b_code)) |
431 | 4136 | return mb_num; | |
432 | } | ||
433 | } | ||
434 | 1495017 | return 0; | |
435 | } | ||
436 | |||
437 | ✗ | static int mpeg4_decode_sprite_trajectory(Mpeg4DecContext *ctx, GetBitContext *gb) | |
438 | { | ||
439 | ✗ | MpegEncContext *s = &ctx->h.c; | |
440 | ✗ | int a = 2 << ctx->sprite_warping_accuracy; | |
441 | ✗ | int rho = 3 - ctx->sprite_warping_accuracy; | |
442 | ✗ | int r = 16 / a; | |
443 | ✗ | int alpha = 1; | |
444 | ✗ | int beta = 0; | |
445 | ✗ | int w = s->width; | |
446 | ✗ | int h = s->height; | |
447 | int min_ab, i, w2, h2, w3, h3; | ||
448 | int sprite_ref[4][2]; | ||
449 | int virtual_ref[2][2]; | ||
450 | int64_t sprite_offset[2][2]; | ||
451 | int64_t sprite_delta[2][2]; | ||
452 | |||
453 | // only true for rectangle shapes | ||
454 | ✗ | const int vop_ref[4][2] = { { 0, 0 }, { s->width, 0 }, | |
455 | ✗ | { 0, s->height }, { s->width, s->height } }; | |
456 | ✗ | int d[4][2] = { { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 } }; | |
457 | |||
458 | ✗ | if (w <= 0 || h <= 0) | |
459 | ✗ | return AVERROR_INVALIDDATA; | |
460 | |||
461 | ✗ | for (i = 0; i < ctx->num_sprite_warping_points; i++) { | |
462 | int length; | ||
463 | ✗ | int x = 0, y = 0; | |
464 | |||
465 | ✗ | length = get_vlc2(gb, sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 2); | |
466 | ✗ | if (length > 0) | |
467 | ✗ | x = get_xbits(gb, length); | |
468 | |||
469 | ✗ | if (!(ctx->divx_version == 500 && ctx->divx_build == 413)) | |
470 | ✗ | check_marker(s->avctx, gb, "before sprite_trajectory"); | |
471 | |||
472 | ✗ | length = get_vlc2(gb, sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 2); | |
473 | ✗ | if (length > 0) | |
474 | ✗ | y = get_xbits(gb, length); | |
475 | |||
476 | ✗ | check_marker(s->avctx, gb, "after sprite_trajectory"); | |
477 | ✗ | ctx->sprite_traj[i][0] = d[i][0] = x; | |
478 | ✗ | ctx->sprite_traj[i][1] = d[i][1] = y; | |
479 | } | ||
480 | ✗ | for (; i < 4; i++) | |
481 | ✗ | ctx->sprite_traj[i][0] = ctx->sprite_traj[i][1] = 0; | |
482 | |||
483 | ✗ | while ((1 << alpha) < w) | |
484 | ✗ | alpha++; | |
485 | ✗ | while ((1 << beta) < h) | |
486 | ✗ | beta++; /* typo in the MPEG-4 std for the definition of w' and h' */ | |
487 | ✗ | w2 = 1 << alpha; | |
488 | ✗ | h2 = 1 << beta; | |
489 | |||
490 | // Note, the 4th point isn't used for GMC | ||
491 | ✗ | if (ctx->divx_version == 500 && ctx->divx_build == 413) { | |
492 | ✗ | sprite_ref[0][0] = a * vop_ref[0][0] + d[0][0]; | |
493 | ✗ | sprite_ref[0][1] = a * vop_ref[0][1] + d[0][1]; | |
494 | ✗ | sprite_ref[1][0] = a * vop_ref[1][0] + d[0][0] + d[1][0]; | |
495 | ✗ | sprite_ref[1][1] = a * vop_ref[1][1] + d[0][1] + d[1][1]; | |
496 | ✗ | sprite_ref[2][0] = a * vop_ref[2][0] + d[0][0] + d[2][0]; | |
497 | ✗ | sprite_ref[2][1] = a * vop_ref[2][1] + d[0][1] + d[2][1]; | |
498 | } else { | ||
499 | ✗ | sprite_ref[0][0] = (a >> 1) * (2 * vop_ref[0][0] + d[0][0]); | |
500 | ✗ | sprite_ref[0][1] = (a >> 1) * (2 * vop_ref[0][1] + d[0][1]); | |
501 | ✗ | sprite_ref[1][0] = (a >> 1) * (2 * vop_ref[1][0] + d[0][0] + d[1][0]); | |
502 | ✗ | sprite_ref[1][1] = (a >> 1) * (2 * vop_ref[1][1] + d[0][1] + d[1][1]); | |
503 | ✗ | sprite_ref[2][0] = (a >> 1) * (2 * vop_ref[2][0] + d[0][0] + d[2][0]); | |
504 | ✗ | sprite_ref[2][1] = (a >> 1) * (2 * vop_ref[2][1] + d[0][1] + d[2][1]); | |
505 | } | ||
506 | /* sprite_ref[3][0] = (a >> 1) * (2 * vop_ref[3][0] + d[0][0] + d[1][0] + d[2][0] + d[3][0]); | ||
507 | * sprite_ref[3][1] = (a >> 1) * (2 * vop_ref[3][1] + d[0][1] + d[1][1] + d[2][1] + d[3][1]); */ | ||
508 | |||
509 | /* This is mostly identical to the MPEG-4 std (and is totally unreadable | ||
510 | * because of that...). Perhaps it should be reordered to be more readable. | ||
511 | * The idea behind this virtual_ref mess is to be able to use shifts later | ||
512 | * per pixel instead of divides so the distance between points is converted | ||
513 | * from w&h based to w2&h2 based which are of the 2^x form. */ | ||
514 | ✗ | virtual_ref[0][0] = 16 * (vop_ref[0][0] + w2) + | |
515 | ✗ | ROUNDED_DIV(((w - w2) * | |
516 | (r * sprite_ref[0][0] - 16LL * vop_ref[0][0]) + | ||
517 | w2 * (r * sprite_ref[1][0] - 16LL * vop_ref[1][0])), w); | ||
518 | ✗ | virtual_ref[0][1] = 16 * vop_ref[0][1] + | |
519 | ✗ | ROUNDED_DIV(((w - w2) * | |
520 | (r * sprite_ref[0][1] - 16LL * vop_ref[0][1]) + | ||
521 | w2 * (r * sprite_ref[1][1] - 16LL * vop_ref[1][1])), w); | ||
522 | ✗ | virtual_ref[1][0] = 16 * vop_ref[0][0] + | |
523 | ✗ | ROUNDED_DIV(((h - h2) * (r * sprite_ref[0][0] - 16LL * vop_ref[0][0]) + | |
524 | h2 * (r * sprite_ref[2][0] - 16LL * vop_ref[2][0])), h); | ||
525 | ✗ | virtual_ref[1][1] = 16 * (vop_ref[0][1] + h2) + | |
526 | ✗ | ROUNDED_DIV(((h - h2) * (r * sprite_ref[0][1] - 16LL * vop_ref[0][1]) + | |
527 | h2 * (r * sprite_ref[2][1] - 16LL * vop_ref[2][1])), h); | ||
528 | |||
529 | ✗ | switch (ctx->num_sprite_warping_points) { | |
530 | ✗ | case 0: | |
531 | ✗ | sprite_offset[0][0] = | |
532 | ✗ | sprite_offset[0][1] = | |
533 | ✗ | sprite_offset[1][0] = | |
534 | ✗ | sprite_offset[1][1] = 0; | |
535 | ✗ | sprite_delta[0][0] = a; | |
536 | ✗ | sprite_delta[0][1] = | |
537 | ✗ | sprite_delta[1][0] = 0; | |
538 | ✗ | sprite_delta[1][1] = a; | |
539 | ✗ | ctx->sprite_shift[0] = | |
540 | ✗ | ctx->sprite_shift[1] = 0; | |
541 | ✗ | break; | |
542 | ✗ | case 1: // GMC only | |
543 | ✗ | sprite_offset[0][0] = sprite_ref[0][0] - a * vop_ref[0][0]; | |
544 | ✗ | sprite_offset[0][1] = sprite_ref[0][1] - a * vop_ref[0][1]; | |
545 | ✗ | sprite_offset[1][0] = ((sprite_ref[0][0] >> 1) | (sprite_ref[0][0] & 1)) - | |
546 | ✗ | a * (vop_ref[0][0] / 2); | |
547 | ✗ | sprite_offset[1][1] = ((sprite_ref[0][1] >> 1) | (sprite_ref[0][1] & 1)) - | |
548 | ✗ | a * (vop_ref[0][1] / 2); | |
549 | ✗ | sprite_delta[0][0] = a; | |
550 | ✗ | sprite_delta[0][1] = | |
551 | ✗ | sprite_delta[1][0] = 0; | |
552 | ✗ | sprite_delta[1][1] = a; | |
553 | ✗ | ctx->sprite_shift[0] = | |
554 | ✗ | ctx->sprite_shift[1] = 0; | |
555 | ✗ | break; | |
556 | ✗ | case 2: | |
557 | ✗ | sprite_offset[0][0] = ((int64_t) sprite_ref[0][0] * (1 << alpha + rho)) + | |
558 | ✗ | ((int64_t) -r * sprite_ref[0][0] + virtual_ref[0][0]) * | |
559 | ✗ | ((int64_t) -vop_ref[0][0]) + | |
560 | ✗ | ((int64_t) r * sprite_ref[0][1] - virtual_ref[0][1]) * | |
561 | ✗ | ((int64_t) -vop_ref[0][1]) + (1 << (alpha + rho - 1)); | |
562 | ✗ | sprite_offset[0][1] = ((int64_t) sprite_ref[0][1] * (1 << alpha + rho)) + | |
563 | ✗ | ((int64_t) -r * sprite_ref[0][1] + virtual_ref[0][1]) * | |
564 | ✗ | ((int64_t) -vop_ref[0][0]) + | |
565 | ✗ | ((int64_t) -r * sprite_ref[0][0] + virtual_ref[0][0]) * | |
566 | ✗ | ((int64_t) -vop_ref[0][1]) + (1 << (alpha + rho - 1)); | |
567 | ✗ | sprite_offset[1][0] = (((int64_t)-r * sprite_ref[0][0] + virtual_ref[0][0]) * | |
568 | ✗ | ((int64_t)-2 * vop_ref[0][0] + 1) + | |
569 | ✗ | ((int64_t) r * sprite_ref[0][1] - virtual_ref[0][1]) * | |
570 | ✗ | ((int64_t)-2 * vop_ref[0][1] + 1) + 2 * w2 * r * | |
571 | ✗ | (int64_t) sprite_ref[0][0] - 16 * w2 + (1 << (alpha + rho + 1))); | |
572 | ✗ | sprite_offset[1][1] = (((int64_t)-r * sprite_ref[0][1] + virtual_ref[0][1]) * | |
573 | ✗ | ((int64_t)-2 * vop_ref[0][0] + 1) + | |
574 | ✗ | ((int64_t)-r * sprite_ref[0][0] + virtual_ref[0][0]) * | |
575 | ✗ | ((int64_t)-2 * vop_ref[0][1] + 1) + 2 * w2 * r * | |
576 | ✗ | (int64_t) sprite_ref[0][1] - 16 * w2 + (1 << (alpha + rho + 1))); | |
577 | ✗ | sprite_delta[0][0] = (-r * sprite_ref[0][0] + virtual_ref[0][0]); | |
578 | ✗ | sprite_delta[0][1] = (+r * sprite_ref[0][1] - virtual_ref[0][1]); | |
579 | ✗ | sprite_delta[1][0] = (-r * sprite_ref[0][1] + virtual_ref[0][1]); | |
580 | ✗ | sprite_delta[1][1] = (-r * sprite_ref[0][0] + virtual_ref[0][0]); | |
581 | |||
582 | ✗ | ctx->sprite_shift[0] = alpha + rho; | |
583 | ✗ | ctx->sprite_shift[1] = alpha + rho + 2; | |
584 | ✗ | break; | |
585 | ✗ | case 3: | |
586 | ✗ | min_ab = FFMIN(alpha, beta); | |
587 | ✗ | w3 = w2 >> min_ab; | |
588 | ✗ | h3 = h2 >> min_ab; | |
589 | ✗ | sprite_offset[0][0] = ((int64_t)sprite_ref[0][0] * (1 << (alpha + beta + rho - min_ab))) + | |
590 | ✗ | ((int64_t)-r * sprite_ref[0][0] + virtual_ref[0][0]) * h3 * (-vop_ref[0][0]) + | |
591 | ✗ | ((int64_t)-r * sprite_ref[0][0] + virtual_ref[1][0]) * w3 * (-vop_ref[0][1]) + | |
592 | ✗ | ((int64_t)1 << (alpha + beta + rho - min_ab - 1)); | |
593 | ✗ | sprite_offset[0][1] = ((int64_t)sprite_ref[0][1] * (1 << (alpha + beta + rho - min_ab))) + | |
594 | ✗ | ((int64_t)-r * sprite_ref[0][1] + virtual_ref[0][1]) * h3 * (-vop_ref[0][0]) + | |
595 | ✗ | ((int64_t)-r * sprite_ref[0][1] + virtual_ref[1][1]) * w3 * (-vop_ref[0][1]) + | |
596 | ✗ | ((int64_t)1 << (alpha + beta + rho - min_ab - 1)); | |
597 | ✗ | sprite_offset[1][0] = ((int64_t)-r * sprite_ref[0][0] + virtual_ref[0][0]) * h3 * (-2 * vop_ref[0][0] + 1) + | |
598 | ✗ | ((int64_t)-r * sprite_ref[0][0] + virtual_ref[1][0]) * w3 * (-2 * vop_ref[0][1] + 1) + | |
599 | ✗ | (int64_t)2 * w2 * h3 * r * sprite_ref[0][0] - 16 * w2 * h3 + | |
600 | ✗ | ((int64_t)1 << (alpha + beta + rho - min_ab + 1)); | |
601 | ✗ | sprite_offset[1][1] = ((int64_t)-r * sprite_ref[0][1] + virtual_ref[0][1]) * h3 * (-2 * vop_ref[0][0] + 1) + | |
602 | ✗ | ((int64_t)-r * sprite_ref[0][1] + virtual_ref[1][1]) * w3 * (-2 * vop_ref[0][1] + 1) + | |
603 | ✗ | (int64_t)2 * w2 * h3 * r * sprite_ref[0][1] - 16 * w2 * h3 + | |
604 | ✗ | ((int64_t)1 << (alpha + beta + rho - min_ab + 1)); | |
605 | ✗ | sprite_delta[0][0] = (-r * (int64_t)sprite_ref[0][0] + virtual_ref[0][0]) * h3; | |
606 | ✗ | sprite_delta[0][1] = (-r * (int64_t)sprite_ref[0][0] + virtual_ref[1][0]) * w3; | |
607 | ✗ | sprite_delta[1][0] = (-r * (int64_t)sprite_ref[0][1] + virtual_ref[0][1]) * h3; | |
608 | ✗ | sprite_delta[1][1] = (-r * (int64_t)sprite_ref[0][1] + virtual_ref[1][1]) * w3; | |
609 | |||
610 | ✗ | ctx->sprite_shift[0] = alpha + beta + rho - min_ab; | |
611 | ✗ | ctx->sprite_shift[1] = alpha + beta + rho - min_ab + 2; | |
612 | ✗ | break; | |
613 | ✗ | default: | |
614 | ✗ | av_unreachable("num_sprite_warping_points outside of 0..3 results in an error" | |
615 | "in which num_sprite_warping_points is reset to zero"); | ||
616 | } | ||
617 | /* try to simplify the situation */ | ||
618 | ✗ | if (sprite_delta[0][0] == a << ctx->sprite_shift[0] && | |
619 | ✗ | sprite_delta[0][1] == 0 && | |
620 | ✗ | sprite_delta[1][0] == 0 && | |
621 | ✗ | sprite_delta[1][1] == a << ctx->sprite_shift[0]) { | |
622 | ✗ | sprite_offset[0][0] >>= ctx->sprite_shift[0]; | |
623 | ✗ | sprite_offset[0][1] >>= ctx->sprite_shift[0]; | |
624 | ✗ | sprite_offset[1][0] >>= ctx->sprite_shift[1]; | |
625 | ✗ | sprite_offset[1][1] >>= ctx->sprite_shift[1]; | |
626 | ✗ | sprite_delta[0][0] = a; | |
627 | ✗ | sprite_delta[0][1] = 0; | |
628 | ✗ | sprite_delta[1][0] = 0; | |
629 | ✗ | sprite_delta[1][1] = a; | |
630 | ✗ | ctx->sprite_shift[0] = 0; | |
631 | ✗ | ctx->sprite_shift[1] = 0; | |
632 | ✗ | ctx->real_sprite_warping_points = 1; | |
633 | } else { | ||
634 | ✗ | int shift_y = 16 - ctx->sprite_shift[0]; | |
635 | ✗ | int shift_c = 16 - ctx->sprite_shift[1]; | |
636 | |||
637 | ✗ | for (i = 0; i < 2; i++) { | |
638 | ✗ | if (shift_c < 0 || shift_y < 0 || | |
639 | ✗ | FFABS( sprite_offset[0][i]) >= INT_MAX >> shift_y || | |
640 | ✗ | FFABS( sprite_offset[1][i]) >= INT_MAX >> shift_c || | |
641 | ✗ | FFABS( sprite_delta[0][i]) >= INT_MAX >> shift_y || | |
642 | ✗ | FFABS( sprite_delta[1][i]) >= INT_MAX >> shift_y | |
643 | ) { | ||
644 | ✗ | avpriv_request_sample(s->avctx, "Too large sprite shift, delta or offset"); | |
645 | ✗ | goto overflow; | |
646 | } | ||
647 | } | ||
648 | |||
649 | ✗ | for (i = 0; i < 2; i++) { | |
650 | ✗ | sprite_offset[0][i] *= 1 << shift_y; | |
651 | ✗ | sprite_offset[1][i] *= 1 << shift_c; | |
652 | ✗ | sprite_delta[0][i] *= 1 << shift_y; | |
653 | ✗ | sprite_delta[1][i] *= 1 << shift_y; | |
654 | ✗ | ctx->sprite_shift[i] = 16; | |
655 | |||
656 | } | ||
657 | ✗ | for (i = 0; i < 2; i++) { | |
658 | ✗ | int64_t sd[2] = { | |
659 | ✗ | sprite_delta[i][0] - a * (1LL<<16), | |
660 | ✗ | sprite_delta[i][1] - a * (1LL<<16) | |
661 | }; | ||
662 | |||
663 | ✗ | if (llabs(sprite_offset[0][i] + sprite_delta[i][0] * (w+16LL)) >= INT_MAX || | |
664 | ✗ | llabs(sprite_offset[0][i] + sprite_delta[i][1] * (h+16LL)) >= INT_MAX || | |
665 | ✗ | llabs(sprite_offset[0][i] + sprite_delta[i][0] * (w+16LL) + sprite_delta[i][1] * (h+16LL)) >= INT_MAX || | |
666 | ✗ | llabs(sprite_delta[i][0] * (w+16LL)) >= INT_MAX || | |
667 | ✗ | llabs(sprite_delta[i][1] * (h+16LL)) >= INT_MAX || | |
668 | ✗ | llabs(sd[0]) >= INT_MAX || | |
669 | ✗ | llabs(sd[1]) >= INT_MAX || | |
670 | ✗ | llabs(sprite_offset[0][i] + sd[0] * (w+16LL)) >= INT_MAX || | |
671 | ✗ | llabs(sprite_offset[0][i] + sd[1] * (h+16LL)) >= INT_MAX || | |
672 | ✗ | llabs(sprite_offset[0][i] + sd[0] * (w+16LL) + sd[1] * (h+16LL)) >= INT_MAX | |
673 | ) { | ||
674 | ✗ | avpriv_request_sample(s->avctx, "Overflow on sprite points"); | |
675 | ✗ | goto overflow; | |
676 | } | ||
677 | } | ||
678 | ✗ | ctx->real_sprite_warping_points = ctx->num_sprite_warping_points; | |
679 | } | ||
680 | |||
681 | ✗ | for (i = 0; i < 4; i++) { | |
682 | ✗ | ctx->sprite_offset[i&1][i>>1] = sprite_offset[i&1][i>>1]; | |
683 | ✗ | ctx->sprite_delta [i&1][i>>1] = sprite_delta [i&1][i>>1]; | |
684 | } | ||
685 | |||
686 | ✗ | return 0; | |
687 | ✗ | overflow: | |
688 | ✗ | memset(ctx->sprite_offset, 0, sizeof(ctx->sprite_offset)); | |
689 | ✗ | memset(ctx->sprite_delta, 0, sizeof(ctx->sprite_delta)); | |
690 | ✗ | return AVERROR_PATCHWELCOME; | |
691 | } | ||
692 | |||
693 | ✗ | static int decode_new_pred(Mpeg4DecContext *ctx, GetBitContext *gb) { | |
694 | ✗ | int len = FFMIN(ctx->time_increment_bits + 3, 15); | |
695 | |||
696 | ✗ | get_bits(gb, len); | |
697 | ✗ | if (get_bits1(gb)) | |
698 | ✗ | get_bits(gb, len); | |
699 | ✗ | check_marker(ctx->h.c.avctx, gb, "after new_pred"); | |
700 | |||
701 | ✗ | return 0; | |
702 | } | ||
703 | |||
704 | /** | ||
705 | * Decode the next video packet. | ||
706 | * @return <0 if something went wrong | ||
707 | */ | ||
708 | 3907 | int ff_mpeg4_decode_video_packet_header(H263DecContext *const h) | |
709 | { | ||
710 | 3907 | Mpeg4DecContext *const ctx = h263_to_mpeg4(h); | |
711 | |||
712 | 3907 | int mb_num_bits = av_log2(h->c.mb_num - 1) + 1; | |
713 | 3907 | int header_extension = 0, mb_num, len; | |
714 | |||
715 | /* is there enough space left for a video packet + header */ | ||
716 |
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3907 | if (get_bits_count(&h->gb) > h->gb.size_in_bits - 20) |
717 | ✗ | return AVERROR_INVALIDDATA; | |
718 | |||
719 |
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68858 | for (len = 0; len < 32; len++) |
720 |
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68858 | if (get_bits1(&h->gb)) |
721 | 3907 | break; | |
722 | |||
723 |
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|
3907 | if (len != ff_mpeg4_get_video_packet_prefix_length(h->c.pict_type, ctx->f_code, ctx->b_code)) { |
724 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "marker does not match f_code\n"); | |
725 | ✗ | return AVERROR_INVALIDDATA; | |
726 | } | ||
727 | |||
728 |
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|
3907 | if (ctx->shape != RECT_SHAPE) { |
729 | ✗ | header_extension = get_bits1(&h->gb); | |
730 | // FIXME more stuff here | ||
731 | } | ||
732 | |||
733 | 3907 | mb_num = get_bits(&h->gb, mb_num_bits); | |
734 |
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3907 | if (mb_num >= h->c.mb_num || !mb_num) { |
735 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
736 | "illegal mb_num in video packet (%d %d) \n", mb_num, h->c.mb_num); | ||
737 | ✗ | return AVERROR_INVALIDDATA; | |
738 | } | ||
739 | |||
740 | 3907 | h->c.mb_x = mb_num % h->c.mb_width; | |
741 | 3907 | h->c.mb_y = mb_num / h->c.mb_width; | |
742 | |||
743 |
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3907 | if (ctx->shape != BIN_ONLY_SHAPE) { |
744 | 3907 | int qscale = get_bits(&h->gb, ctx->quant_precision); | |
745 |
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3907 | if (qscale) |
746 | 3907 | h->c.chroma_qscale = h->c.qscale = qscale; | |
747 | } | ||
748 | |||
749 |
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3907 | if (ctx->shape == RECT_SHAPE) |
750 | 3907 | header_extension = get_bits1(&h->gb); | |
751 | |||
752 |
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|
3907 | if (header_extension) { |
753 | ✗ | while (get_bits1(&h->gb) != 0) | |
754 | ; | ||
755 | |||
756 | ✗ | check_marker(h->c.avctx, &h->gb, "before time_increment in video packed header"); | |
757 | ✗ | skip_bits(&h->gb, ctx->time_increment_bits); /* time_increment */ | |
758 | ✗ | check_marker(h->c.avctx, &h->gb, "before vop_coding_type in video packed header"); | |
759 | |||
760 | ✗ | skip_bits(&h->gb, 2); /* vop coding type */ | |
761 | // FIXME not rect stuff here | ||
762 | |||
763 | ✗ | if (ctx->shape != BIN_ONLY_SHAPE) { | |
764 | ✗ | skip_bits(&h->gb, 3); /* intra dc vlc threshold */ | |
765 | // FIXME don't just ignore everything | ||
766 | ✗ | if (h->c.pict_type == AV_PICTURE_TYPE_S && | |
767 | ✗ | ctx->vol_sprite_usage == GMC_SPRITE) { | |
768 | ✗ | if (mpeg4_decode_sprite_trajectory(ctx, &h->gb) < 0) | |
769 | ✗ | return AVERROR_INVALIDDATA; | |
770 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "untested\n"); | |
771 | } | ||
772 | |||
773 | // FIXME reduced res stuff here | ||
774 | |||
775 | ✗ | if (h->c.pict_type != AV_PICTURE_TYPE_I) { | |
776 | ✗ | int f_code = get_bits(&h->gb, 3); /* fcode_for */ | |
777 | ✗ | if (f_code == 0) | |
778 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
779 | "Error, video packet header damaged (f_code=0)\n"); | ||
780 | } | ||
781 | ✗ | if (h->c.pict_type == AV_PICTURE_TYPE_B) { | |
782 | ✗ | int b_code = get_bits(&h->gb, 3); | |
783 | ✗ | if (b_code == 0) | |
784 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
785 | "Error, video packet header damaged (b_code=0)\n"); | ||
786 | } | ||
787 | } | ||
788 | } | ||
789 |
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3907 | if (ctx->new_pred) |
790 | ✗ | decode_new_pred(ctx, &h->gb); | |
791 | |||
792 | 3907 | return 0; | |
793 | } | ||
794 | |||
795 | 30 | static void reset_studio_dc_predictors(Mpeg4DecContext *const ctx) | |
796 | { | ||
797 | 30 | MPVContext *const s = &ctx->h.c; | |
798 | /* Reset DC Predictors */ | ||
799 | 30 | s->last_dc[0] = | |
800 | 30 | s->last_dc[1] = | |
801 | 30 | s->last_dc[2] = 1 << (s->avctx->bits_per_raw_sample + ctx->dct_precision + s->intra_dc_precision - 1); | |
802 | 30 | } | |
803 | |||
804 | /** | ||
805 | * Decode the next video packet. | ||
806 | * @return <0 if something went wrong | ||
807 | */ | ||
808 | 30 | int ff_mpeg4_decode_studio_slice_header(H263DecContext *const h) | |
809 | { | ||
810 | 30 | Mpeg4DecContext *const ctx = h263_to_mpeg4(h); | |
811 | 30 | GetBitContext *gb = &h->gb; | |
812 | unsigned vlc_len; | ||
813 | uint16_t mb_num; | ||
814 | |||
815 |
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30 | if (get_bits_left(gb) >= 32 && get_bits_long(gb, 32) == SLICE_STARTCODE) { |
816 | 30 | vlc_len = av_log2(h->c.mb_width * h->c.mb_height) + 1; | |
817 | 30 | mb_num = get_bits(gb, vlc_len); | |
818 | |||
819 |
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30 | if (mb_num >= h->c.mb_num) |
820 | ✗ | return AVERROR_INVALIDDATA; | |
821 | |||
822 | 30 | h->c.mb_x = mb_num % h->c.mb_width; | |
823 | 30 | h->c.mb_y = mb_num / h->c.mb_width; | |
824 | |||
825 |
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30 | if (ctx->shape != BIN_ONLY_SHAPE) |
826 | 30 | h->c.qscale = mpeg_get_qscale(&h->gb, h->c.q_scale_type); | |
827 | |||
828 |
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30 | if (get_bits1(gb)) { /* slice_extension_flag */ |
829 | ✗ | skip_bits1(gb); /* intra_slice */ | |
830 | ✗ | skip_bits1(gb); /* slice_VOP_id_enable */ | |
831 | ✗ | skip_bits(gb, 6); /* slice_VOP_id */ | |
832 | ✗ | while (get_bits1(gb)) /* extra_bit_slice */ | |
833 | ✗ | skip_bits(gb, 8); /* extra_information_slice */ | |
834 | } | ||
835 | |||
836 | 30 | reset_studio_dc_predictors(ctx); | |
837 | } | ||
838 | else { | ||
839 | ✗ | return AVERROR_INVALIDDATA; | |
840 | } | ||
841 | |||
842 | 30 | return 0; | |
843 | } | ||
844 | |||
845 | /** | ||
846 | * Get the average motion vector for a GMC MB. | ||
847 | * @param n either 0 for the x component or 1 for y | ||
848 | * @return the average MV for a GMC MB | ||
849 | */ | ||
850 | ✗ | static inline int get_amv(Mpeg4DecContext *ctx, int n) | |
851 | { | ||
852 | ✗ | MPVContext *const s = &ctx->h.c; | |
853 | int x, y, mb_v, sum, dx, dy, shift; | ||
854 | ✗ | int len = 1 << (ctx->f_code + 4); | |
855 | ✗ | const int a = ctx->sprite_warping_accuracy; | |
856 | |||
857 | ✗ | if (s->workaround_bugs & FF_BUG_AMV) | |
858 | ✗ | len >>= s->quarter_sample; | |
859 | |||
860 | ✗ | if (ctx->real_sprite_warping_points == 1) { | |
861 | ✗ | if (ctx->divx_version == 500 && ctx->divx_build == 413 && a >= s->quarter_sample) | |
862 | ✗ | sum = ctx->sprite_offset[0][n] / (1 << (a - s->quarter_sample)); | |
863 | else | ||
864 | ✗ | sum = RSHIFT(ctx->sprite_offset[0][n] * (1 << s->quarter_sample), a); | |
865 | } else { | ||
866 | ✗ | dx = ctx->sprite_delta[n][0]; | |
867 | ✗ | dy = ctx->sprite_delta[n][1]; | |
868 | ✗ | shift = ctx->sprite_shift[0]; | |
869 | ✗ | if (n) | |
870 | ✗ | dy -= 1 << (shift + a + 1); | |
871 | else | ||
872 | ✗ | dx -= 1 << (shift + a + 1); | |
873 | ✗ | mb_v = ctx->sprite_offset[0][n] + dx * s->mb_x * 16U + dy * s->mb_y * 16U; | |
874 | |||
875 | ✗ | sum = 0; | |
876 | ✗ | for (y = 0; y < 16; y++) { | |
877 | int v; | ||
878 | |||
879 | ✗ | v = mb_v + (unsigned)dy * y; | |
880 | // FIXME optimize | ||
881 | ✗ | for (x = 0; x < 16; x++) { | |
882 | ✗ | sum += v >> shift; | |
883 | ✗ | v += dx; | |
884 | } | ||
885 | } | ||
886 | ✗ | sum = RSHIFT(sum, a + 8 - s->quarter_sample); | |
887 | } | ||
888 | |||
889 | ✗ | if (sum < -len) | |
890 | ✗ | sum = -len; | |
891 | ✗ | else if (sum >= len) | |
892 | ✗ | sum = len - 1; | |
893 | |||
894 | ✗ | return sum; | |
895 | } | ||
896 | |||
897 | /** | ||
898 | * Predict the dc. | ||
899 | * @param n block index (0-3 are luma, 4-5 are chroma) | ||
900 | * @param dir_ptr pointer to an integer where the prediction direction will be stored | ||
901 | */ | ||
902 | 1129218 | static inline int mpeg4_pred_dc(MpegEncContext *s, int n, int *dir_ptr) | |
903 | { | ||
904 | 1129218 | const int16_t *const dc_val = s->dc_val + s->block_index[n]; | |
905 | 1129218 | const int wrap = s->block_wrap[n]; | |
906 | int pred; | ||
907 | |||
908 | /* find prediction */ | ||
909 | |||
910 | /* B C | ||
911 | * A X | ||
912 | */ | ||
913 | 1129218 | int a = dc_val[-1]; | |
914 | 1129218 | int b = dc_val[-1 - wrap]; | |
915 | 1129218 | int c = dc_val[-wrap]; | |
916 | |||
917 | /* outside slice handling (we can't do that by memset as we need the | ||
918 | * dc for error resilience) */ | ||
919 |
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1129218 | if (s->first_slice_line && n != 3) { |
920 |
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109220 | if (n != 2) |
921 | 87376 | b = c = 1024; | |
922 |
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109220 | if (n != 1 && s->mb_x == s->resync_mb_x) |
923 | 4356 | b = a = 1024; | |
924 | } | ||
925 |
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1129218 | if (s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y + 1) { |
926 |
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6270 | if (n == 0 || n == 4 || n == 5) |
927 | 3135 | b = 1024; | |
928 | } | ||
929 | |||
930 |
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1129218 | if (abs(a - b) < abs(b - c)) { |
931 | 433509 | pred = c; | |
932 | 433509 | *dir_ptr = 1; /* top */ | |
933 | } else { | ||
934 | 695709 | pred = a; | |
935 | 695709 | *dir_ptr = 0; /* left */ | |
936 | } | ||
937 | 1129218 | return pred; | |
938 | } | ||
939 | |||
940 | 1129218 | static inline int mpeg4_get_level_dc(MpegEncContext *s, int n, int pred, int level) | |
941 | { | ||
942 |
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1129218 | int scale = n < 4 ? s->y_dc_scale : s->c_dc_scale; |
943 | int ret; | ||
944 | |||
945 | if (IS_3IV1) | ||
946 | scale = 8; | ||
947 | |||
948 | /* we assume pred is positive */ | ||
949 | 1129218 | pred = FASTDIV((pred + (scale >> 1)), scale); | |
950 | |||
951 | 1129218 | level += pred; | |
952 | 1129218 | ret = level; | |
953 | 1129218 | level *= scale; | |
954 |
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1129218 | if (level & (~2047)) { |
955 | ✗ | if (s->avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) { | |
956 | ✗ | if (level < 0) { | |
957 | ✗ | av_log(s->avctx, AV_LOG_ERROR, | |
958 | "dc<0 at %dx%d\n", s->mb_x, s->mb_y); | ||
959 | ✗ | return AVERROR_INVALIDDATA; | |
960 | } | ||
961 | ✗ | if (level > 2048 + scale) { | |
962 | ✗ | av_log(s->avctx, AV_LOG_ERROR, | |
963 | "dc overflow at %dx%d\n", s->mb_x, s->mb_y); | ||
964 | ✗ | return AVERROR_INVALIDDATA; | |
965 | } | ||
966 | } | ||
967 | ✗ | if (level < 0) | |
968 | ✗ | level = 0; | |
969 | ✗ | else if (!(s->workaround_bugs & FF_BUG_DC_CLIP)) | |
970 | ✗ | level = 2047; | |
971 | } | ||
972 | 1129218 | s->dc_val[s->block_index[n]] = level; | |
973 | |||
974 | 1129218 | return ret; | |
975 | } | ||
976 | |||
977 | /** | ||
978 | * Decode the dc value. | ||
979 | * @param n block index (0-3 are luma, 4-5 are chroma) | ||
980 | * @param dir_ptr the prediction direction will be stored here | ||
981 | * @return the quantized dc | ||
982 | */ | ||
983 | 1129218 | static inline int mpeg4_decode_dc(H263DecContext *const h, int n, int *dir_ptr) | |
984 | { | ||
985 | int level, code, pred; | ||
986 | |||
987 |
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1129218 | if (n < 4) |
988 | 752812 | code = get_vlc2(&h->gb, dc_lum, DC_VLC_BITS, 1); | |
989 | else | ||
990 | 376406 | code = get_vlc2(&h->gb, dc_chrom, DC_VLC_BITS, 1); | |
991 | |||
992 |
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1129218 | if (code < 0) { |
993 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "illegal dc vlc\n"); | |
994 | ✗ | return AVERROR_INVALIDDATA; | |
995 | } | ||
996 | |||
997 |
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1129218 | if (code == 0) { |
998 | 181103 | level = 0; | |
999 | } else { | ||
1000 | if (IS_3IV1) { | ||
1001 | if (code == 1) | ||
1002 | level = 2 * get_bits1(&h->gb) - 1; | ||
1003 | else { | ||
1004 | if (get_bits1(&h->gb)) | ||
1005 | level = get_bits(&h->gb, code - 1) + (1 << (code - 1)); | ||
1006 | else | ||
1007 | level = -get_bits(&h->gb, code - 1) - (1 << (code - 1)); | ||
1008 | } | ||
1009 | } else { | ||
1010 | 948115 | level = get_xbits(&h->gb, code); | |
1011 | } | ||
1012 | |||
1013 |
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948115 | if (code > 8) { |
1014 | ✗ | if (get_bits1(&h->gb) == 0) { /* marker */ | |
1015 | ✗ | if (h->c.avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)) { | |
1016 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "dc marker bit missing\n"); | |
1017 | ✗ | return AVERROR_INVALIDDATA; | |
1018 | } | ||
1019 | } | ||
1020 | } | ||
1021 | } | ||
1022 | |||
1023 | 1129218 | pred = mpeg4_pred_dc(&h->c, n, dir_ptr); | |
1024 | 1129218 | return mpeg4_get_level_dc(&h->c, n, pred, level); | |
1025 | } | ||
1026 | |||
1027 | /** | ||
1028 | * Decode first partition. | ||
1029 | * @return number of MBs decoded or <0 if an error occurred | ||
1030 | */ | ||
1031 | 1728 | static int mpeg4_decode_partition_a(Mpeg4DecContext *ctx) | |
1032 | { | ||
1033 | 1728 | H263DecContext *const h = &ctx->h; | |
1034 | 1728 | int mb_num = 0; | |
1035 | static const int8_t quant_tab[4] = { -1, -2, 1, 2 }; | ||
1036 | |||
1037 | /* decode first partition */ | ||
1038 | 1728 | h->c.first_slice_line = 1; | |
1039 |
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8311 | for (; h->c.mb_y < h->c.mb_height; h->c.mb_y++) { |
1040 | 7839 | ff_init_block_index(&h->c); | |
1041 |
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145903 | for (; h->c.mb_x < h->c.mb_width; h->c.mb_x++) { |
1042 | 139320 | const int xy = h->c.mb_x + h->c.mb_y * h->c.mb_stride; | |
1043 | int cbpc; | ||
1044 | 139320 | int dir = 0; | |
1045 | |||
1046 | 139320 | mb_num++; | |
1047 | 139320 | ff_update_block_index(&h->c, 8, h->c.avctx->lowres, 1); | |
1048 |
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139320 | if (h->c.mb_x == h->c.resync_mb_x && h->c.mb_y == h->c.resync_mb_y + 1) |
1049 | 1611 | h->c.first_slice_line = 0; | |
1050 | |||
1051 |
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139320 | if (h->c.pict_type == AV_PICTURE_TYPE_I) { |
1052 | int i; | ||
1053 | |||
1054 | do { | ||
1055 |
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✓ Branch 2 taken 17323 times.
|
17762 | if (show_bits(&h->gb, 19) == DC_MARKER) |
1056 | 439 | return mb_num - 1; | |
1057 | |||
1058 | 17323 | cbpc = get_vlc2(&h->gb, ff_h263_intra_MCBPC_vlc, INTRA_MCBPC_VLC_BITS, 2); | |
1059 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 17323 times.
|
17323 | if (cbpc < 0) { |
1060 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1061 | "mcbpc corrupted at %d %d\n", h->c.mb_x, h->c.mb_y); | ||
1062 | ✗ | return AVERROR_INVALIDDATA; | |
1063 | } | ||
1064 |
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✓ Branch 1 taken 17323 times.
|
17323 | } while (cbpc == 8); |
1065 | |||
1066 | 17323 | h->c.cbp_table[xy] = cbpc & 3; | |
1067 | 17323 | h->c.cur_pic.mb_type[xy] = MB_TYPE_INTRA; | |
1068 | 17323 | h->c.mb_intra = 1; | |
1069 | |||
1070 |
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|
17323 | if (cbpc & 4) |
1071 | ✗ | ff_set_qscale(&h->c, h->c.qscale + quant_tab[get_bits(&h->gb, 2)]); | |
1072 | |||
1073 | 17323 | h->c.cur_pic.qscale_table[xy] = h->c.qscale; | |
1074 | |||
1075 | 17323 | h->c.mbintra_table[xy] = 1; | |
1076 |
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✓ Branch 1 taken 17323 times.
|
121261 | for (i = 0; i < 6; i++) { |
1077 | int dc_pred_dir; | ||
1078 | 103938 | int dc = mpeg4_decode_dc(h, i, &dc_pred_dir); | |
1079 |
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✓ Branch 1 taken 103938 times.
|
103938 | if (dc < 0) { |
1080 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1081 | "DC corrupted at %d %d\n", h->c.mb_x, h->c.mb_y); | ||
1082 | ✗ | return dc; | |
1083 | } | ||
1084 | 103938 | dir <<= 1; | |
1085 |
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✓ Branch 1 taken 73820 times.
|
103938 | if (dc_pred_dir) |
1086 | 30118 | dir |= 1; | |
1087 | } | ||
1088 | 17323 | h->c.pred_dir_table[xy] = dir; | |
1089 | } else { /* P/S_TYPE */ | ||
1090 | int mx, my, pred_x, pred_y, bits; | ||
1091 | 121558 | int16_t *const mot_val = h->c.cur_pic.motion_val[0][h->c.block_index[0]]; | |
1092 | 121558 | const int stride = h->c.b8_stride * 2; | |
1093 | |||
1094 | 121558 | try_again: | |
1095 | 121558 | bits = show_bits(&h->gb, 17); | |
1096 |
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✓ Branch 1 taken 120741 times.
|
121558 | if (bits == MOTION_MARKER) |
1097 | 817 | return mb_num - 1; | |
1098 | |||
1099 | 120741 | skip_bits1(&h->gb); | |
1100 |
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✓ Branch 1 taken 119744 times.
|
120741 | if (bits & 0x10000) { |
1101 | /* skip mb */ | ||
1102 |
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✓ Branch 1 taken 997 times.
|
997 | if (h->c.pict_type == AV_PICTURE_TYPE_S && |
1103 | ✗ | ctx->vol_sprite_usage == GMC_SPRITE) { | |
1104 | ✗ | h->c.cur_pic.mb_type[xy] = MB_TYPE_SKIP | | |
1105 | MB_TYPE_16x16 | | ||
1106 | MB_TYPE_GMC | | ||
1107 | MB_TYPE_FORWARD_MV; | ||
1108 | ✗ | mx = get_amv(ctx, 0); | |
1109 | ✗ | my = get_amv(ctx, 1); | |
1110 | } else { | ||
1111 | 997 | h->c.cur_pic.mb_type[xy] = MB_TYPE_SKIP | | |
1112 | MB_TYPE_16x16 | | ||
1113 | MB_TYPE_FORWARD_MV; | ||
1114 | 997 | mx = my = 0; | |
1115 | } | ||
1116 | 997 | mot_val[0] = | |
1117 | 997 | mot_val[2] = | |
1118 | 997 | mot_val[0 + stride] = | |
1119 | 997 | mot_val[2 + stride] = mx; | |
1120 | 997 | mot_val[1] = | |
1121 | 997 | mot_val[3] = | |
1122 | 997 | mot_val[1 + stride] = | |
1123 | 997 | mot_val[3 + stride] = my; | |
1124 | |||
1125 | 997 | ff_h263_clean_intra_table_entries(&h->c, xy); | |
1126 | 997 | continue; | |
1127 | } | ||
1128 | |||
1129 | 119744 | cbpc = get_vlc2(&h->gb, ff_h263_inter_MCBPC_vlc, INTER_MCBPC_VLC_BITS, 2); | |
1130 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 119744 times.
|
119744 | if (cbpc < 0) { |
1131 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1132 | "mcbpc corrupted at %d %d\n", h->c.mb_x, h->c.mb_y); | ||
1133 | ✗ | return AVERROR_INVALIDDATA; | |
1134 | } | ||
1135 |
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✓ Branch 1 taken 119744 times.
|
119744 | if (cbpc == 20) |
1136 | ✗ | goto try_again; | |
1137 | |||
1138 | 119744 | h->c.cbp_table[xy] = cbpc & (8 + 3); // 8 is dquant | |
1139 | |||
1140 | 119744 | h->c.mb_intra = ((cbpc & 4) != 0); | |
1141 | |||
1142 |
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✓ Branch 1 taken 113457 times.
|
119744 | if (h->c.mb_intra) { |
1143 | 6287 | h->c.cur_pic.mb_type[xy] = MB_TYPE_INTRA; | |
1144 | 6287 | h->c.mbintra_table[xy] = 1; | |
1145 | 6287 | mot_val[0] = | |
1146 | 6287 | mot_val[2] = | |
1147 | 6287 | mot_val[0 + stride] = | |
1148 | 6287 | mot_val[2 + stride] = 0; | |
1149 | 6287 | mot_val[1] = | |
1150 | 6287 | mot_val[3] = | |
1151 | 6287 | mot_val[1 + stride] = | |
1152 | 6287 | mot_val[3 + stride] = 0; | |
1153 | } else { | ||
1154 | 113457 | ff_h263_clean_intra_table_entries(&h->c, xy); | |
1155 | |||
1156 |
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✓ Branch 1 taken 113457 times.
|
113457 | if (h->c.pict_type == AV_PICTURE_TYPE_S && |
1157 | ✗ | ctx->vol_sprite_usage == GMC_SPRITE && | |
1158 | ✗ | (cbpc & 16) == 0) | |
1159 | ✗ | h->c.mcsel = get_bits1(&h->gb); | |
1160 | else | ||
1161 | 113457 | h->c.mcsel = 0; | |
1162 | |||
1163 |
2/2✓ Branch 0 taken 81626 times.
✓ Branch 1 taken 31831 times.
|
113457 | if ((cbpc & 16) == 0) { |
1164 | /* 16x16 motion prediction */ | ||
1165 | |||
1166 | 81626 | ff_h263_pred_motion(&h->c, 0, 0, &pred_x, &pred_y); | |
1167 |
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✗ Branch 1 not taken.
|
81626 | if (!h->c.mcsel) { |
1168 | 81626 | mx = ff_h263_decode_motion(h, pred_x, ctx->f_code); | |
1169 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 81626 times.
|
81626 | if (mx >= 0xffff) |
1170 | ✗ | return AVERROR_INVALIDDATA; | |
1171 | |||
1172 | 81626 | my = ff_h263_decode_motion(h, pred_y, ctx->f_code); | |
1173 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 81626 times.
|
81626 | if (my >= 0xffff) |
1174 | ✗ | return AVERROR_INVALIDDATA; | |
1175 | 81626 | h->c.cur_pic.mb_type[xy] = MB_TYPE_16x16 | | |
1176 | MB_TYPE_FORWARD_MV; | ||
1177 | } else { | ||
1178 | ✗ | mx = get_amv(ctx, 0); | |
1179 | ✗ | my = get_amv(ctx, 1); | |
1180 | ✗ | h->c.cur_pic.mb_type[xy] = MB_TYPE_16x16 | | |
1181 | MB_TYPE_GMC | | ||
1182 | MB_TYPE_FORWARD_MV; | ||
1183 | } | ||
1184 | |||
1185 | 81626 | mot_val[0] = | |
1186 | 81626 | mot_val[2] = | |
1187 | 81626 | mot_val[0 + stride] = | |
1188 | 81626 | mot_val[2 + stride] = mx; | |
1189 | 81626 | mot_val[1] = | |
1190 | 81626 | mot_val[3] = | |
1191 | 81626 | mot_val[1 + stride] = | |
1192 | 81626 | mot_val[3 + stride] = my; | |
1193 | } else { | ||
1194 | int i; | ||
1195 | 31831 | h->c.cur_pic.mb_type[xy] = MB_TYPE_8x8 | | |
1196 | MB_TYPE_FORWARD_MV; | ||
1197 |
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✓ Branch 1 taken 31831 times.
|
159155 | for (i = 0; i < 4; i++) { |
1198 | 127324 | int16_t *mot_val = ff_h263_pred_motion(&h->c, i, 0, &pred_x, &pred_y); | |
1199 | 127324 | mx = ff_h263_decode_motion(h, pred_x, ctx->f_code); | |
1200 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 127324 times.
|
127324 | if (mx >= 0xffff) |
1201 | ✗ | return AVERROR_INVALIDDATA; | |
1202 | |||
1203 | 127324 | my = ff_h263_decode_motion(h, pred_y, ctx->f_code); | |
1204 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 127324 times.
|
127324 | if (my >= 0xffff) |
1205 | ✗ | return AVERROR_INVALIDDATA; | |
1206 | 127324 | mot_val[0] = mx; | |
1207 | 127324 | mot_val[1] = my; | |
1208 | } | ||
1209 | } | ||
1210 | } | ||
1211 | } | ||
1212 | } | ||
1213 | 6583 | h->c.mb_x = 0; | |
1214 | } | ||
1215 | |||
1216 | 472 | return mb_num; | |
1217 | } | ||
1218 | |||
1219 | /** | ||
1220 | * decode second partition. | ||
1221 | * @return <0 if an error occurred | ||
1222 | */ | ||
1223 | 1728 | static int mpeg4_decode_partition_b(H263DecContext *const h, int mb_count) | |
1224 | { | ||
1225 | 1728 | int mb_num = 0; | |
1226 | static const int8_t quant_tab[4] = { -1, -2, 1, 2 }; | ||
1227 | |||
1228 | 1728 | h->c.mb_x = h->c.resync_mb_x; | |
1229 | 1728 | h->c.first_slice_line = 1; | |
1230 |
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✗ Branch 1 not taken.
|
7728 | for (h->c.mb_y = h->c.resync_mb_y; mb_num < mb_count; h->c.mb_y++) { |
1231 | 7728 | ff_init_block_index(&h->c); | |
1232 |
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✓ Branch 2 taken 138064 times.
✓ Branch 3 taken 6000 times.
|
145792 | for (; mb_num < mb_count && h->c.mb_x < h->c.mb_width; h->c.mb_x++) { |
1233 | 138064 | const int xy = h->c.mb_x + h->c.mb_y * h->c.mb_stride; | |
1234 | |||
1235 | 138064 | mb_num++; | |
1236 | 138064 | ff_update_block_index(&h->c, 8, h->c.avctx->lowres, 1); | |
1237 |
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✓ Branch 1 taken 130726 times.
✓ Branch 2 taken 1611 times.
✓ Branch 3 taken 5727 times.
|
138064 | if (h->c.mb_x == h->c.resync_mb_x && h->c.mb_y == h->c.resync_mb_y + 1) |
1238 | 1611 | h->c.first_slice_line = 0; | |
1239 | |||
1240 |
2/2✓ Branch 0 taken 17323 times.
✓ Branch 1 taken 120741 times.
|
138064 | if (h->c.pict_type == AV_PICTURE_TYPE_I) { |
1241 | 17323 | int ac_pred = get_bits1(&h->gb); | |
1242 | 17323 | int cbpy = get_vlc2(&h->gb, ff_h263_cbpy_vlc, CBPY_VLC_BITS, 1); | |
1243 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 17323 times.
|
17323 | if (cbpy < 0) { |
1244 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1245 | "cbpy corrupted at %d %d\n", h->c.mb_x, h->c.mb_y); | ||
1246 | ✗ | return AVERROR_INVALIDDATA; | |
1247 | } | ||
1248 | |||
1249 | 17323 | h->c.cbp_table[xy] |= cbpy << 2; | |
1250 | 17323 | h->c.cur_pic.mb_type[xy] |= ac_pred * MB_TYPE_ACPRED; | |
1251 | } else { /* P || S_TYPE */ | ||
1252 |
2/2✓ Branch 0 taken 6287 times.
✓ Branch 1 taken 114454 times.
|
120741 | if (IS_INTRA(h->c.cur_pic.mb_type[xy])) { |
1253 | int i; | ||
1254 | 6287 | int dir = 0; | |
1255 | 6287 | int ac_pred = get_bits1(&h->gb); | |
1256 | 6287 | int cbpy = get_vlc2(&h->gb, ff_h263_cbpy_vlc, CBPY_VLC_BITS, 1); | |
1257 | |||
1258 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 6287 times.
|
6287 | if (cbpy < 0) { |
1259 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1260 | "I cbpy corrupted at %d %d\n", h->c.mb_x, h->c.mb_y); | ||
1261 | ✗ | return AVERROR_INVALIDDATA; | |
1262 | } | ||
1263 | |||
1264 |
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✓ Branch 1 taken 6287 times.
|
6287 | if (h->c.cbp_table[xy] & 8) |
1265 | ✗ | ff_set_qscale(&h->c, h->c.qscale + quant_tab[get_bits(&h->gb, 2)]); | |
1266 | 6287 | h->c.cur_pic.qscale_table[xy] = h->c.qscale; | |
1267 | |||
1268 |
2/2✓ Branch 0 taken 37722 times.
✓ Branch 1 taken 6287 times.
|
44009 | for (i = 0; i < 6; i++) { |
1269 | int dc_pred_dir; | ||
1270 | 37722 | int dc = mpeg4_decode_dc(h, i, &dc_pred_dir); | |
1271 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 37722 times.
|
37722 | if (dc < 0) { |
1272 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1273 | "DC corrupted at %d %d\n", h->c.mb_x, h->c.mb_y); | ||
1274 | ✗ | return dc; | |
1275 | } | ||
1276 | 37722 | dir <<= 1; | |
1277 |
2/2✓ Branch 0 taken 11780 times.
✓ Branch 1 taken 25942 times.
|
37722 | if (dc_pred_dir) |
1278 | 11780 | dir |= 1; | |
1279 | } | ||
1280 | 6287 | h->c.cbp_table[xy] &= 3; // remove dquant | |
1281 | 6287 | h->c.cbp_table[xy] |= cbpy << 2; | |
1282 | 6287 | h->c.cur_pic.mb_type[xy] |= ac_pred * MB_TYPE_ACPRED; | |
1283 | 6287 | h->c.pred_dir_table[xy] = dir; | |
1284 |
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✓ Branch 1 taken 113457 times.
|
114454 | } else if (IS_SKIP(h->c.cur_pic.mb_type[xy])) { |
1285 | 997 | h->c.cur_pic.qscale_table[xy] = h->c.qscale; | |
1286 | 997 | h->c.cbp_table[xy] = 0; | |
1287 | } else { | ||
1288 | 113457 | int cbpy = get_vlc2(&h->gb, ff_h263_cbpy_vlc, CBPY_VLC_BITS, 1); | |
1289 | |||
1290 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 113457 times.
|
113457 | if (cbpy < 0) { |
1291 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1292 | "P cbpy corrupted at %d %d\n", h->c.mb_x, h->c.mb_y); | ||
1293 | ✗ | return AVERROR_INVALIDDATA; | |
1294 | } | ||
1295 | |||
1296 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 113457 times.
|
113457 | if (h->c.cbp_table[xy] & 8) |
1297 | ✗ | ff_set_qscale(&h->c, h->c.qscale + quant_tab[get_bits(&h->gb, 2)]); | |
1298 | 113457 | h->c.cur_pic.qscale_table[xy] = h->c.qscale; | |
1299 | |||
1300 | 113457 | h->c.cbp_table[xy] &= 3; // remove dquant | |
1301 | 113457 | h->c.cbp_table[xy] |= (cbpy ^ 0xf) << 2; | |
1302 | } | ||
1303 | } | ||
1304 | } | ||
1305 |
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✓ Branch 1 taken 6000 times.
|
7728 | if (mb_num >= mb_count) |
1306 | 1728 | return 0; | |
1307 | 6000 | h->c.mb_x = 0; | |
1308 | } | ||
1309 | ✗ | return 0; | |
1310 | } | ||
1311 | |||
1312 | /** | ||
1313 | * Decode the first and second partition. | ||
1314 | * @return <0 if error (and sets error type in the error_status_table) | ||
1315 | */ | ||
1316 | 1728 | int ff_mpeg4_decode_partitions(H263DecContext *const h) | |
1317 | { | ||
1318 | 1728 | Mpeg4DecContext *const ctx = h263_to_mpeg4(h); | |
1319 | int mb_num; | ||
1320 | int ret; | ||
1321 |
2/2✓ Branch 0 taken 499 times.
✓ Branch 1 taken 1229 times.
|
1728 | const int part_a_error = h->c.pict_type == AV_PICTURE_TYPE_I ? (ER_DC_ERROR | ER_MV_ERROR) : ER_MV_ERROR; |
1322 |
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✓ Branch 1 taken 1229 times.
|
1728 | const int part_a_end = h->c.pict_type == AV_PICTURE_TYPE_I ? (ER_DC_END | ER_MV_END) : ER_MV_END; |
1323 | |||
1324 | 1728 | mb_num = mpeg4_decode_partition_a(ctx); | |
1325 |
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✓ Branch 1 taken 1728 times.
|
1728 | if (mb_num <= 0) { |
1326 | ✗ | ff_er_add_slice(&h->c.er, h->c.resync_mb_x, h->c.resync_mb_y, | |
1327 | h->c.mb_x, h->c.mb_y, part_a_error); | ||
1328 | ✗ | return mb_num ? mb_num : AVERROR_INVALIDDATA; | |
1329 | } | ||
1330 | |||
1331 |
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✓ Branch 1 taken 1728 times.
|
1728 | if (h->c.resync_mb_x + h->c.resync_mb_y * h->c.mb_width + mb_num > h->c.mb_num) { |
1332 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "slice below monitor ...\n"); | |
1333 | ✗ | ff_er_add_slice(&h->c.er, h->c.resync_mb_x, h->c.resync_mb_y, | |
1334 | h->c.mb_x, h->c.mb_y, part_a_error); | ||
1335 | ✗ | return AVERROR_INVALIDDATA; | |
1336 | } | ||
1337 | |||
1338 | 1728 | h->mb_num_left = mb_num; | |
1339 | |||
1340 |
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✓ Branch 1 taken 1229 times.
|
1728 | if (h->c.pict_type == AV_PICTURE_TYPE_I) { |
1341 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 499 times.
|
499 | while (show_bits(&h->gb, 9) == 1) |
1342 | ✗ | skip_bits(&h->gb, 9); | |
1343 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 499 times.
|
499 | if (get_bits(&h->gb, 19) != DC_MARKER) { |
1344 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1345 | "marker missing after first I partition at %d %d\n", | ||
1346 | h->c.mb_x, h->c.mb_y); | ||
1347 | ✗ | return AVERROR_INVALIDDATA; | |
1348 | } | ||
1349 | } else { | ||
1350 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 1229 times.
|
1229 | while (show_bits(&h->gb, 10) == 1) |
1351 | ✗ | skip_bits(&h->gb, 10); | |
1352 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 1229 times.
|
1229 | if (get_bits(&h->gb, 17) != MOTION_MARKER) { |
1353 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1354 | "marker missing after first P partition at %d %d\n", | ||
1355 | h->c.mb_x, h->c.mb_y); | ||
1356 | ✗ | return AVERROR_INVALIDDATA; | |
1357 | } | ||
1358 | } | ||
1359 | 1728 | ff_er_add_slice(&h->c.er, h->c.resync_mb_x, h->c.resync_mb_y, | |
1360 | 1728 | h->c.mb_x - 1, h->c.mb_y, part_a_end); | |
1361 | |||
1362 | 1728 | ret = mpeg4_decode_partition_b(h, mb_num); | |
1363 |
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✓ Branch 1 taken 1728 times.
|
1728 | if (ret < 0) { |
1364 | ✗ | if (h->c.pict_type == AV_PICTURE_TYPE_P) | |
1365 | ✗ | ff_er_add_slice(&h->c.er, h->c.resync_mb_x, h->c.resync_mb_y, | |
1366 | h->c.mb_x, h->c.mb_y, ER_DC_ERROR); | ||
1367 | ✗ | return ret; | |
1368 | } else { | ||
1369 |
2/2✓ Branch 0 taken 1229 times.
✓ Branch 1 taken 499 times.
|
1728 | if (h->c.pict_type == AV_PICTURE_TYPE_P) |
1370 | 1229 | ff_er_add_slice(&h->c.er, h->c.resync_mb_x, h->c.resync_mb_y, | |
1371 | 1229 | h->c.mb_x - 1, h->c.mb_y, ER_DC_END); | |
1372 | } | ||
1373 | |||
1374 | 1728 | return 0; | |
1375 | } | ||
1376 | |||
1377 | /** | ||
1378 | * Decode a block. | ||
1379 | * @return <0 if an error occurred | ||
1380 | */ | ||
1381 | 8031564 | static inline int mpeg4_decode_block(Mpeg4DecContext *ctx, int16_t *block, | |
1382 | int n, int coded, int intra, | ||
1383 | int use_intra_dc_vlc, int rvlc) | ||
1384 | { | ||
1385 | 8031564 | H263DecContext *const h = &ctx->h; | |
1386 | int level, i, last, run, qmul, qadd, pred; | ||
1387 | 8031564 | int av_uninit(dc_pred_dir); | |
1388 | const RLTable *rl; | ||
1389 | const RL_VLC_ELEM *rl_vlc; | ||
1390 | const uint8_t *scan_table; | ||
1391 | |||
1392 | // Note intra & rvlc should be optimized away if this is inlined | ||
1393 | |||
1394 |
2/2✓ Branch 0 taken 1129218 times.
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|
8031564 | if (intra) { |
1395 | // FIXME add short header support | ||
1396 |
1/2✓ Branch 0 taken 1129218 times.
✗ Branch 1 not taken.
|
1129218 | if (use_intra_dc_vlc) { |
1397 | /* DC coef */ | ||
1398 |
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|
1129218 | if (h->partitioned_frame) { |
1399 | 141660 | level = h->c.dc_val[h->c.block_index[n]]; | |
1400 |
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|
141660 | if (n < 4) |
1401 | 94440 | level = FASTDIV((level + (h->c.y_dc_scale >> 1)), h->c.y_dc_scale); | |
1402 | else | ||
1403 | 47220 | level = FASTDIV((level + (h->c.c_dc_scale >> 1)), h->c.c_dc_scale); | |
1404 | 141660 | dc_pred_dir = (h->c.pred_dir_table[h->c.mb_x + h->c.mb_y * h->c.mb_stride] << n) & 32; | |
1405 | } else { | ||
1406 | 987558 | level = mpeg4_decode_dc(h, n, &dc_pred_dir); | |
1407 |
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✓ Branch 1 taken 987558 times.
|
987558 | if (level < 0) |
1408 | ✗ | return level; | |
1409 | } | ||
1410 | 1129218 | block[0] = level; | |
1411 | 1129218 | i = 0; | |
1412 | } else { | ||
1413 | ✗ | i = -1; | |
1414 | ✗ | pred = mpeg4_pred_dc(&h->c, n, &dc_pred_dir); | |
1415 | } | ||
1416 |
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|
1129218 | if (!coded) |
1417 | 236098 | goto not_coded; | |
1418 | |||
1419 |
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✓ Branch 1 taken 893120 times.
|
893120 | if (rvlc) { |
1420 | ✗ | rl = &ff_rvlc_rl_intra; | |
1421 | ✗ | rl_vlc = ff_rvlc_rl_intra.rl_vlc[0]; | |
1422 | } else { | ||
1423 | 893120 | rl = &ff_mpeg4_rl_intra; | |
1424 | 893120 | rl_vlc = ff_mpeg4_rl_intra.rl_vlc[0]; | |
1425 | } | ||
1426 |
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|
893120 | if (h->c.ac_pred) { |
1427 |
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|
22081 | if (dc_pred_dir == 0) |
1428 | 15515 | scan_table = h->c.permutated_intra_v_scantable; /* left */ | |
1429 | else | ||
1430 | 6566 | scan_table = h->c.permutated_intra_h_scantable; /* top */ | |
1431 | } else { | ||
1432 | 871039 | scan_table = h->c.intra_scantable.permutated; | |
1433 | } | ||
1434 | 893120 | qmul = 1; | |
1435 | 893120 | qadd = 0; | |
1436 | } else { | ||
1437 | 6902346 | i = -1; | |
1438 |
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|
6902346 | if (!coded) { |
1439 | 4676222 | h->c.block_last_index[n] = i; | |
1440 | 4676222 | return 0; | |
1441 | } | ||
1442 |
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|
2226124 | if (rvlc) |
1443 | ✗ | rl = &ff_rvlc_rl_inter; | |
1444 | else | ||
1445 | 2226124 | rl = &ff_h263_rl_inter; | |
1446 | |||
1447 | 2226124 | scan_table = h->c.intra_scantable.permutated; | |
1448 | |||
1449 |
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|
2226124 | if (ctx->mpeg_quant) { |
1450 | 112985 | qmul = 1; | |
1451 | 112985 | qadd = 0; | |
1452 |
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✓ Branch 1 taken 112985 times.
|
112985 | if (rvlc) |
1453 | ✗ | rl_vlc = ff_rvlc_rl_inter.rl_vlc[0]; | |
1454 | else | ||
1455 | 112985 | rl_vlc = ff_h263_rl_inter.rl_vlc[0]; | |
1456 | } else { | ||
1457 | 2113139 | qmul = h->c.qscale << 1; | |
1458 | 2113139 | qadd = (h->c.qscale - 1) | 1; | |
1459 |
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✓ Branch 1 taken 2113139 times.
|
2113139 | if (rvlc) |
1460 | ✗ | rl_vlc = ff_rvlc_rl_inter.rl_vlc[h->c.qscale]; | |
1461 | else | ||
1462 | 2113139 | rl_vlc = ff_h263_rl_inter.rl_vlc[h->c.qscale]; | |
1463 | } | ||
1464 | } | ||
1465 | { | ||
1466 | 3119244 | OPEN_READER(re, &h->gb); | |
1467 | for (;;) { | ||
1468 | 51087380 | UPDATE_CACHE(re, &h->gb); | |
1469 |
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✓ Branch 2 taken 25962665 times.
|
27103312 | GET_RL_VLC(level, run, re, &h->gb, rl_vlc, TEX_VLC_BITS, 2, 0); |
1470 |
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✓ Branch 1 taken 26312849 times.
|
27103312 | if (level == 0) { |
1471 | /* escape */ | ||
1472 |
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|
790463 | if (rvlc) { |
1473 | ✗ | if (SHOW_UBITS(re, &h->gb, 1) == 0) { | |
1474 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1475 | "1. marker bit missing in rvlc esc\n"); | ||
1476 | ✗ | return AVERROR_INVALIDDATA; | |
1477 | } | ||
1478 | ✗ | SKIP_CACHE(re, &h->gb, 1); | |
1479 | |||
1480 | ✗ | last = SHOW_UBITS(re, &h->gb, 1); | |
1481 | ✗ | SKIP_CACHE(re, &h->gb, 1); | |
1482 | ✗ | run = SHOW_UBITS(re, &h->gb, 6); | |
1483 | ✗ | SKIP_COUNTER(re, &h->gb, 1 + 1 + 6); | |
1484 | ✗ | UPDATE_CACHE(re, &h->gb); | |
1485 | |||
1486 | ✗ | if (SHOW_UBITS(re, &h->gb, 1) == 0) { | |
1487 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1488 | "2. marker bit missing in rvlc esc\n"); | ||
1489 | ✗ | return AVERROR_INVALIDDATA; | |
1490 | } | ||
1491 | ✗ | SKIP_CACHE(re, &h->gb, 1); | |
1492 | |||
1493 | ✗ | level = SHOW_UBITS(re, &h->gb, 11); | |
1494 | ✗ | SKIP_CACHE(re, &h->gb, 11); | |
1495 | |||
1496 | ✗ | if (SHOW_UBITS(re, &h->gb, 5) != 0x10) { | |
1497 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "reverse esc missing\n"); | |
1498 | ✗ | return AVERROR_INVALIDDATA; | |
1499 | } | ||
1500 | ✗ | SKIP_CACHE(re, &h->gb, 5); | |
1501 | |||
1502 | ✗ | level = level * qmul + qadd; | |
1503 | ✗ | level = (level ^ SHOW_SBITS(re, &h->gb, 1)) - SHOW_SBITS(re, &h->gb, 1); | |
1504 | ✗ | SKIP_COUNTER(re, &h->gb, 1 + 11 + 5 + 1); | |
1505 | |||
1506 | ✗ | i += run + 1; | |
1507 | ✗ | if (last) | |
1508 | ✗ | i += 192; | |
1509 | } else { | ||
1510 | int cache; | ||
1511 | 790463 | cache = GET_CACHE(re, &h->gb); | |
1512 | |||
1513 | if (IS_3IV1) | ||
1514 | cache ^= 0xC0000000; | ||
1515 | |||
1516 |
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|
790463 | if (cache & 0x80000000) { |
1517 |
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✓ Branch 1 taken 220689 times.
|
364240 | if (cache & 0x40000000) { |
1518 | /* third escape */ | ||
1519 | 143551 | SKIP_CACHE(re, &h->gb, 2); | |
1520 | 143551 | last = SHOW_UBITS(re, &h->gb, 1); | |
1521 | 143551 | SKIP_CACHE(re, &h->gb, 1); | |
1522 | 143551 | run = SHOW_UBITS(re, &h->gb, 6); | |
1523 | 143551 | SKIP_COUNTER(re, &h->gb, 2 + 1 + 6); | |
1524 | 143551 | UPDATE_CACHE(re, &h->gb); | |
1525 | |||
1526 | if (IS_3IV1) { | ||
1527 | level = SHOW_SBITS(re, &h->gb, 12); | ||
1528 | LAST_SKIP_BITS(re, &h->gb, 12); | ||
1529 | } else { | ||
1530 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 143551 times.
|
143551 | if (SHOW_UBITS(re, &h->gb, 1) == 0) { |
1531 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1532 | "1. marker bit missing in 3. esc\n"); | ||
1533 | ✗ | if (!(h->c.avctx->err_recognition & AV_EF_IGNORE_ERR) || get_bits_left(&h->gb) <= 0) | |
1534 | ✗ | return AVERROR_INVALIDDATA; | |
1535 | } | ||
1536 | 143551 | SKIP_CACHE(re, &h->gb, 1); | |
1537 | |||
1538 | 143551 | level = SHOW_SBITS(re, &h->gb, 12); | |
1539 | 143551 | SKIP_CACHE(re, &h->gb, 12); | |
1540 | |||
1541 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 143551 times.
|
143551 | if (SHOW_UBITS(re, &h->gb, 1) == 0) { |
1542 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1543 | "2. marker bit missing in 3. esc\n"); | ||
1544 | ✗ | if (!(h->c.avctx->err_recognition & AV_EF_IGNORE_ERR) || get_bits_left(&h->gb) <= 0) | |
1545 | ✗ | return AVERROR_INVALIDDATA; | |
1546 | } | ||
1547 | |||
1548 | 143551 | SKIP_COUNTER(re, &h->gb, 1 + 12 + 1); | |
1549 | } | ||
1550 | |||
1551 | #if 0 | ||
1552 | if (h->c.error_recognition >= FF_ER_COMPLIANT) { | ||
1553 | const int abs_level= FFABS(level); | ||
1554 | if (abs_level<=MAX_LEVEL && run<=MAX_RUN) { | ||
1555 | const int run1= run - rl->max_run[last][abs_level] - 1; | ||
1556 | if (abs_level <= rl->max_level[last][run]) { | ||
1557 | av_log(h->c.avctx, AV_LOG_ERROR, "illegal 3. esc, vlc encoding possible\n"); | ||
1558 | return AVERROR_INVALIDDATA; | ||
1559 | } | ||
1560 | if (h->c.error_recognition > FF_ER_COMPLIANT) { | ||
1561 | if (abs_level <= rl->max_level[last][run]*2) { | ||
1562 | av_log(h->c.avctx, AV_LOG_ERROR, "illegal 3. esc, esc 1 encoding possible\n"); | ||
1563 | return AVERROR_INVALIDDATA; | ||
1564 | } | ||
1565 | if (run1 >= 0 && abs_level <= rl->max_level[last][run1]) { | ||
1566 | av_log(h->c.avctx, AV_LOG_ERROR, "illegal 3. esc, esc 2 encoding possible\n"); | ||
1567 | return AVERROR_INVALIDDATA; | ||
1568 | } | ||
1569 | } | ||
1570 | } | ||
1571 | } | ||
1572 | #endif | ||
1573 |
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|
143551 | if (level > 0) |
1574 | 71733 | level = level * qmul + qadd; | |
1575 | else | ||
1576 | 71818 | level = level * qmul - qadd; | |
1577 | |||
1578 |
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|
143551 | if ((unsigned)(level + 2048) > 4095) { |
1579 | ✗ | if (h->c.avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_AGGRESSIVE)) { | |
1580 | ✗ | if (level > 2560 || level < -2560) { | |
1581 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1582 | "|level| overflow in 3. esc, qp=%d\n", | ||
1583 | h->c.qscale); | ||
1584 | ✗ | return AVERROR_INVALIDDATA; | |
1585 | } | ||
1586 | } | ||
1587 | ✗ | level = level < 0 ? -2048 : 2047; | |
1588 | } | ||
1589 | |||
1590 | 143551 | i += run + 1; | |
1591 |
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|
143551 | if (last) |
1592 | 45840 | i += 192; | |
1593 | } else { | ||
1594 | /* second escape */ | ||
1595 | 220689 | SKIP_BITS(re, &h->gb, 2); | |
1596 |
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✓ Branch 2 taken 195854 times.
|
220689 | GET_RL_VLC(level, run, re, &h->gb, rl_vlc, TEX_VLC_BITS, 2, 1); |
1597 | 220689 | i += run + rl->max_run[run >> 7][level / qmul] + 1; // FIXME opt indexing | |
1598 | 220689 | level = (level ^ SHOW_SBITS(re, &h->gb, 1)) - SHOW_SBITS(re, &h->gb, 1); | |
1599 | 220689 | LAST_SKIP_BITS(re, &h->gb, 1); | |
1600 | } | ||
1601 | } else { | ||
1602 | /* first escape */ | ||
1603 | 426223 | SKIP_BITS(re, &h->gb, 1); | |
1604 |
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✓ Branch 2 taken 356559 times.
|
426223 | GET_RL_VLC(level, run, re, &h->gb, rl_vlc, TEX_VLC_BITS, 2, 1); |
1605 | 426223 | i += run; | |
1606 | 426223 | level = level + rl->max_level[run >> 7][(run - 1) & 63] * qmul; // FIXME opt indexing | |
1607 | 426223 | level = (level ^ SHOW_SBITS(re, &h->gb, 1)) - SHOW_SBITS(re, &h->gb, 1); | |
1608 | 426223 | LAST_SKIP_BITS(re, &h->gb, 1); | |
1609 | } | ||
1610 | } | ||
1611 | } else { | ||
1612 | 26312849 | i += run; | |
1613 | 26312849 | level = (level ^ SHOW_SBITS(re, &h->gb, 1)) - SHOW_SBITS(re, &h->gb, 1); | |
1614 | 26312849 | LAST_SKIP_BITS(re, &h->gb, 1); | |
1615 | } | ||
1616 | ff_tlog(h->c.avctx, "dct[%d][%d] = %- 4d end?:%d\n", scan_table[i&63]&7, scan_table[i&63] >> 3, level, i>62); | ||
1617 |
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|
27103312 | if (i > 62) { |
1618 | 3119244 | i -= 192; | |
1619 |
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|
3119244 | if (i & (~63)) { |
1620 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1621 | "ac-tex damaged at %d %d\n", h->c.mb_x, h->c.mb_y); | ||
1622 | ✗ | return AVERROR_INVALIDDATA; | |
1623 | } | ||
1624 | |||
1625 | 3119244 | block[scan_table[i]] = level; | |
1626 | 3119244 | break; | |
1627 | } | ||
1628 | |||
1629 | 23984068 | block[scan_table[i]] = level; | |
1630 | } | ||
1631 | 3119244 | CLOSE_READER(re, &h->gb); | |
1632 | } | ||
1633 | |||
1634 | 3355342 | not_coded: | |
1635 |
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|
3355342 | if (intra) { |
1636 |
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|
1129218 | if (!use_intra_dc_vlc) { |
1637 | ✗ | block[0] = mpeg4_get_level_dc(&h->c, n, pred, block[0]); | |
1638 | |||
1639 | ✗ | i -= i >> 31; // if (i == -1) i = 0; | |
1640 | } | ||
1641 | |||
1642 | 1129218 | ff_mpeg4_pred_ac(h, block, n, dc_pred_dir); | |
1643 |
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✓ Branch 1 taken 1103328 times.
|
1129218 | if (h->c.ac_pred) |
1644 | 25890 | i = 63; // FIXME not optimal | |
1645 | } | ||
1646 | 3355342 | h->c.block_last_index[n] = i; | |
1647 | 3355342 | return 0; | |
1648 | } | ||
1649 | |||
1650 | /** | ||
1651 | * decode partition C of one MB. | ||
1652 | * @return <0 if an error occurred | ||
1653 | */ | ||
1654 | 138064 | static int mpeg4_decode_partitioned_mb(H263DecContext *const h) | |
1655 | { | ||
1656 | 138064 | Mpeg4DecContext *const ctx = h263_to_mpeg4(h); | |
1657 | 138064 | const int xy = h->c.mb_x + h->c.mb_y * h->c.mb_stride; | |
1658 | |||
1659 | 138064 | const int mb_type = h->c.cur_pic.mb_type[xy]; | |
1660 | 138064 | int cbp = h->c.cbp_table[xy]; | |
1661 | |||
1662 | 138064 | const int use_intra_dc_vlc = h->c.qscale < ctx->intra_dc_threshold; | |
1663 | |||
1664 |
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✓ Branch 1 taken 138064 times.
|
138064 | if (h->c.cur_pic.qscale_table[xy] != h->c.qscale) |
1665 | ✗ | ff_set_qscale(&h->c, h->c.cur_pic.qscale_table[xy]); | |
1666 | |||
1667 |
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|
138064 | if (h->c.pict_type == AV_PICTURE_TYPE_P || |
1668 |
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✓ Branch 1 taken 17323 times.
|
138064 | h->c.pict_type == AV_PICTURE_TYPE_S) { |
1669 | int i; | ||
1670 |
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✓ Branch 1 taken 120741 times.
|
603705 | for (i = 0; i < 4; i++) { |
1671 | 482964 | h->c.mv[0][i][0] = h->c.cur_pic.motion_val[0][h->c.block_index[i]][0]; | |
1672 | 482964 | h->c.mv[0][i][1] = h->c.cur_pic.motion_val[0][h->c.block_index[i]][1]; | |
1673 | } | ||
1674 | 120741 | h->c.mb_intra = IS_INTRA(mb_type); | |
1675 | |||
1676 |
2/2✓ Branch 0 taken 997 times.
✓ Branch 1 taken 119744 times.
|
120741 | if (IS_SKIP(mb_type)) { |
1677 | /* skip mb */ | ||
1678 |
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✓ Branch 1 taken 997 times.
|
6979 | for (i = 0; i < 6; i++) |
1679 | 5982 | h->c.block_last_index[i] = -1; | |
1680 | 997 | h->c.mv_dir = MV_DIR_FORWARD; | |
1681 | 997 | h->c.mv_type = MV_TYPE_16X16; | |
1682 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 997 times.
|
997 | if (h->c.pict_type == AV_PICTURE_TYPE_S |
1683 | ✗ | && ctx->vol_sprite_usage == GMC_SPRITE) { | |
1684 | ✗ | h->c.mcsel = 1; | |
1685 | ✗ | h->c.mb_skipped = 0; | |
1686 | ✗ | h->c.cur_pic.mbskip_table[xy] = 0; | |
1687 | } else { | ||
1688 | 997 | h->c.mcsel = 0; | |
1689 | 997 | h->c.mb_skipped = 1; | |
1690 | 997 | h->c.cur_pic.mbskip_table[xy] = 1; | |
1691 | } | ||
1692 |
2/2✓ Branch 0 taken 6287 times.
✓ Branch 1 taken 113457 times.
|
119744 | } else if (h->c.mb_intra) { |
1693 | 6287 | h->c.ac_pred = IS_ACPRED(h->c.cur_pic.mb_type[xy]); | |
1694 |
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✗ Branch 1 not taken.
|
113457 | } else if (!h->c.mb_intra) { |
1695 | // h->c.mcsel = 0; // FIXME do we need to init that? | ||
1696 | |||
1697 | 113457 | h->c.mv_dir = MV_DIR_FORWARD; | |
1698 |
2/2✓ Branch 0 taken 31831 times.
✓ Branch 1 taken 81626 times.
|
113457 | if (IS_8X8(mb_type)) { |
1699 | 31831 | h->c.mv_type = MV_TYPE_8X8; | |
1700 | } else { | ||
1701 | 81626 | h->c.mv_type = MV_TYPE_16X16; | |
1702 | } | ||
1703 | } | ||
1704 | } else { /* I-Frame */ | ||
1705 | 17323 | h->c.mb_intra = 1; | |
1706 | 17323 | h->c.ac_pred = IS_ACPRED(h->c.cur_pic.mb_type[xy]); | |
1707 | } | ||
1708 | |||
1709 |
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✓ Branch 1 taken 997 times.
|
138064 | if (!IS_SKIP(mb_type)) { |
1710 | int i; | ||
1711 | 137067 | h->c.bdsp.clear_blocks(h->block[0]); | |
1712 | /* decode each block */ | ||
1713 |
2/2✓ Branch 0 taken 822402 times.
✓ Branch 1 taken 137067 times.
|
959469 | for (i = 0; i < 6; i++) { |
1714 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 822402 times.
|
822402 | if (mpeg4_decode_block(ctx, h->block[i], i, cbp & 32, h->c.mb_intra, |
1715 | use_intra_dc_vlc, ctx->rvlc) < 0) { | ||
1716 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1717 | "texture corrupted at %d %d %d\n", | ||
1718 | h->c.mb_x, h->c.mb_y, h->c.mb_intra); | ||
1719 | ✗ | return AVERROR_INVALIDDATA; | |
1720 | } | ||
1721 | 822402 | cbp += cbp; | |
1722 | } | ||
1723 | } | ||
1724 | |||
1725 | /* per-MB end of slice check */ | ||
1726 |
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|
138064 | if (--h->mb_num_left <= 0) { |
1727 |
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|
1728 | if (mpeg4_is_resync(ctx)) |
1728 | 1728 | return SLICE_END; | |
1729 | else | ||
1730 | ✗ | return SLICE_NOEND; | |
1731 | } else { | ||
1732 |
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|
136336 | if (mpeg4_is_resync(ctx)) { |
1733 |
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|
308 | const int delta = h->c.mb_x + 1 == h->c.mb_width ? 2 : 1; |
1734 |
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|
308 | if (h->c.cbp_table[xy + delta]) |
1735 | ✗ | return SLICE_END; | |
1736 | } | ||
1737 | 136336 | return SLICE_OK; | |
1738 | } | ||
1739 | } | ||
1740 | |||
1741 | 1372492 | static int mpeg4_decode_mb(H263DecContext *const h) | |
1742 | { | ||
1743 | 1372492 | Mpeg4DecContext *const ctx = h263_to_mpeg4(h); | |
1744 | int cbpc, cbpy, i, cbp, pred_x, pred_y, mx, my, dquant; | ||
1745 | static const int8_t quant_tab[4] = { -1, -2, 1, 2 }; | ||
1746 | 1372492 | const int xy = h->c.mb_x + h->c.mb_y * h->c.mb_stride; | |
1747 | int next; | ||
1748 | |||
1749 | av_assert2(h->c.h263_pred); | ||
1750 | |||
1751 |
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|
1372492 | if (h->c.pict_type == AV_PICTURE_TYPE_P || |
1752 |
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|
369402 | h->c.pict_type == AV_PICTURE_TYPE_S) { |
1753 | do { | ||
1754 |
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✓ Branch 2 taken 864967 times.
|
1003090 | if (get_bits1(&h->gb)) { |
1755 | /* skip mb */ | ||
1756 | 138123 | h->c.mb_intra = 0; | |
1757 |
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✓ Branch 1 taken 138123 times.
|
966861 | for (i = 0; i < 6; i++) |
1758 | 828738 | h->c.block_last_index[i] = -1; | |
1759 | 138123 | h->c.mv_dir = MV_DIR_FORWARD; | |
1760 | 138123 | h->c.mv_type = MV_TYPE_16X16; | |
1761 |
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|
138123 | if (h->c.pict_type == AV_PICTURE_TYPE_S && |
1762 | ✗ | ctx->vol_sprite_usage == GMC_SPRITE) { | |
1763 | ✗ | h->c.cur_pic.mb_type[xy] = MB_TYPE_SKIP | | |
1764 | MB_TYPE_GMC | | ||
1765 | MB_TYPE_16x16 | | ||
1766 | MB_TYPE_FORWARD_MV; | ||
1767 | ✗ | h->c.mcsel = 1; | |
1768 | ✗ | h->c.mv[0][0][0] = get_amv(ctx, 0); | |
1769 | ✗ | h->c.mv[0][0][1] = get_amv(ctx, 1); | |
1770 | ✗ | h->c.cur_pic.mbskip_table[xy] = 0; | |
1771 | ✗ | h->c.mb_skipped = 0; | |
1772 | } else { | ||
1773 | 138123 | h->c.cur_pic.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | | |
1774 | MB_TYPE_FORWARD_MV; | ||
1775 | 138123 | h->c.mcsel = 0; | |
1776 | 138123 | h->c.mv[0][0][0] = 0; | |
1777 | 138123 | h->c.mv[0][0][1] = 0; | |
1778 | 138123 | h->c.cur_pic.mbskip_table[xy] = 1; | |
1779 | 138123 | h->c.mb_skipped = 1; | |
1780 | } | ||
1781 | 138123 | goto end; | |
1782 | } | ||
1783 | 864967 | cbpc = get_vlc2(&h->gb, ff_h263_inter_MCBPC_vlc, INTER_MCBPC_VLC_BITS, 2); | |
1784 |
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|
864967 | if (cbpc < 0) { |
1785 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1786 | "mcbpc damaged at %d %d\n", h->c.mb_x, h->c.mb_y); | ||
1787 | ✗ | return AVERROR_INVALIDDATA; | |
1788 | } | ||
1789 |
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|
864967 | } while (cbpc == 20); |
1790 | |||
1791 | 864967 | dquant = cbpc & 8; | |
1792 | 864967 | h->c.mb_intra = ((cbpc & 4) != 0); | |
1793 |
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|
864967 | if (h->c.mb_intra) |
1794 | 29018 | goto intra; | |
1795 | 835949 | h->c.bdsp.clear_blocks(h->block[0]); | |
1796 | |||
1797 |
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|
835949 | if (h->c.pict_type == AV_PICTURE_TYPE_S && |
1798 | ✗ | ctx->vol_sprite_usage == GMC_SPRITE && (cbpc & 16) == 0) | |
1799 | ✗ | h->c.mcsel = get_bits1(&h->gb); | |
1800 | else | ||
1801 | 835949 | h->c.mcsel = 0; | |
1802 | 835949 | cbpy = get_vlc2(&h->gb, ff_h263_cbpy_vlc, CBPY_VLC_BITS, 1) ^ 0x0F; | |
1803 |
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|
835949 | if (cbpy < 0) { |
1804 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
1805 | "P cbpy damaged at %d %d\n", h->c.mb_x, h->c.mb_y); | ||
1806 | ✗ | return AVERROR_INVALIDDATA; | |
1807 | } | ||
1808 | |||
1809 | 835949 | cbp = (cbpc & 3) | (cbpy << 2); | |
1810 |
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✓ Branch 1 taken 818988 times.
|
835949 | if (dquant) |
1811 | 16961 | ff_set_qscale(&h->c, h->c.qscale + quant_tab[get_bits(&h->gb, 2)]); | |
1812 |
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|
835949 | if ((!h->c.progressive_sequence) && |
1813 | ✗ | (cbp || (h->c.workaround_bugs & FF_BUG_XVID_ILACE))) | |
1814 | ✗ | h->c.interlaced_dct = get_bits1(&h->gb); | |
1815 | |||
1816 | 835949 | h->c.mv_dir = MV_DIR_FORWARD; | |
1817 |
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|
835949 | if ((cbpc & 16) == 0) { |
1818 |
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|
740975 | if (h->c.mcsel) { |
1819 | ✗ | h->c.cur_pic.mb_type[xy] = MB_TYPE_GMC | MB_TYPE_16x16 | | |
1820 | MB_TYPE_FORWARD_MV; | ||
1821 | /* 16x16 global motion prediction */ | ||
1822 | ✗ | h->c.mv_type = MV_TYPE_16X16; | |
1823 | ✗ | mx = get_amv(ctx, 0); | |
1824 | ✗ | my = get_amv(ctx, 1); | |
1825 | ✗ | h->c.mv[0][0][0] = mx; | |
1826 | ✗ | h->c.mv[0][0][1] = my; | |
1827 |
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|
740975 | } else if ((!h->c.progressive_sequence) && get_bits1(&h->gb)) { |
1828 | ✗ | h->c.cur_pic.mb_type[xy] = MB_TYPE_16x8 | MB_TYPE_FORWARD_MV | | |
1829 | MB_TYPE_INTERLACED; | ||
1830 | /* 16x8 field motion prediction */ | ||
1831 | ✗ | h->c.mv_type = MV_TYPE_FIELD; | |
1832 | |||
1833 | ✗ | h->c.field_select[0][0] = get_bits1(&h->gb); | |
1834 | ✗ | h->c.field_select[0][1] = get_bits1(&h->gb); | |
1835 | |||
1836 | ✗ | ff_h263_pred_motion(&h->c, 0, 0, &pred_x, &pred_y); | |
1837 | |||
1838 | ✗ | for (i = 0; i < 2; i++) { | |
1839 | ✗ | mx = ff_h263_decode_motion(h, pred_x, ctx->f_code); | |
1840 | ✗ | if (mx >= 0xffff) | |
1841 | ✗ | return AVERROR_INVALIDDATA; | |
1842 | |||
1843 | ✗ | my = ff_h263_decode_motion(h, pred_y / 2, ctx->f_code); | |
1844 | ✗ | if (my >= 0xffff) | |
1845 | ✗ | return AVERROR_INVALIDDATA; | |
1846 | |||
1847 | ✗ | h->c.mv[0][i][0] = mx; | |
1848 | ✗ | h->c.mv[0][i][1] = my; | |
1849 | } | ||
1850 | } else { | ||
1851 | 740975 | h->c.cur_pic.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_FORWARD_MV; | |
1852 | /* 16x16 motion prediction */ | ||
1853 | 740975 | h->c.mv_type = MV_TYPE_16X16; | |
1854 | 740975 | ff_h263_pred_motion(&h->c, 0, 0, &pred_x, &pred_y); | |
1855 | 740975 | mx = ff_h263_decode_motion(h, pred_x, ctx->f_code); | |
1856 | |||
1857 |
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|
740975 | if (mx >= 0xffff) |
1858 | ✗ | return AVERROR_INVALIDDATA; | |
1859 | |||
1860 | 740975 | my = ff_h263_decode_motion(h, pred_y, ctx->f_code); | |
1861 | |||
1862 |
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|
740975 | if (my >= 0xffff) |
1863 | ✗ | return AVERROR_INVALIDDATA; | |
1864 | 740975 | h->c.mv[0][0][0] = mx; | |
1865 | 740975 | h->c.mv[0][0][1] = my; | |
1866 | } | ||
1867 | } else { | ||
1868 | 94974 | h->c.cur_pic.mb_type[xy] = MB_TYPE_8x8 | MB_TYPE_FORWARD_MV; | |
1869 | 94974 | h->c.mv_type = MV_TYPE_8X8; | |
1870 |
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|
474870 | for (i = 0; i < 4; i++) { |
1871 | 379896 | int16_t *mot_val = ff_h263_pred_motion(&h->c, i, 0, &pred_x, &pred_y); | |
1872 | 379896 | mx = ff_h263_decode_motion(h, pred_x, ctx->f_code); | |
1873 |
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|
379896 | if (mx >= 0xffff) |
1874 | ✗ | return AVERROR_INVALIDDATA; | |
1875 | |||
1876 | 379896 | my = ff_h263_decode_motion(h, pred_y, ctx->f_code); | |
1877 |
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|
379896 | if (my >= 0xffff) |
1878 | ✗ | return AVERROR_INVALIDDATA; | |
1879 | 379896 | h->c.mv[0][i][0] = mx; | |
1880 | 379896 | h->c.mv[0][i][1] = my; | |
1881 | 379896 | mot_val[0] = mx; | |
1882 | 379896 | mot_val[1] = my; | |
1883 | } | ||
1884 | } | ||
1885 |
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|
369402 | } else if (h->c.pict_type == AV_PICTURE_TYPE_B) { |
1886 | int modb1; // first bit of modb | ||
1887 | int modb2; // second bit of modb | ||
1888 | int mb_type; | ||
1889 | |||
1890 | 233827 | h->c.mb_intra = 0; // B-frames never contain intra blocks | |
1891 | 233827 | h->c.mcsel = 0; // ... true gmc blocks | |
1892 | |||
1893 |
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|
233827 | if (h->c.mb_x == 0) { |
1894 |
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|
29973 | for (i = 0; i < 2; i++) { |
1895 | 19982 | h->c.last_mv[i][0][0] = | |
1896 | 19982 | h->c.last_mv[i][0][1] = | |
1897 | 19982 | h->c.last_mv[i][1][0] = | |
1898 | 19982 | h->c.last_mv[i][1][1] = 0; | |
1899 | } | ||
1900 | |||
1901 | 9991 | ff_thread_progress_await(&h->c.next_pic.ptr->progress, h->c.mb_y); | |
1902 | } | ||
1903 | |||
1904 | /* if we skipped it in the future P-frame than skip it now too */ | ||
1905 | 233827 | h->c.mb_skipped = h->c.next_pic.mbskip_table[h->c.mb_y * h->c.mb_stride + h->c.mb_x]; // Note, skiptab=0 if last was GMC | |
1906 | |||
1907 |
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|
233827 | if (h->c.mb_skipped) { |
1908 | /* skip mb */ | ||
1909 |
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✓ Branch 1 taken 32842 times.
|
229894 | for (i = 0; i < 6; i++) |
1910 | 197052 | h->c.block_last_index[i] = -1; | |
1911 | |||
1912 | 32842 | h->c.mv_dir = MV_DIR_FORWARD; | |
1913 | 32842 | h->c.mv_type = MV_TYPE_16X16; | |
1914 | 32842 | h->c.mv[0][0][0] = | |
1915 | 32842 | h->c.mv[0][0][1] = | |
1916 | 32842 | h->c.mv[1][0][0] = | |
1917 | 32842 | h->c.mv[1][0][1] = 0; | |
1918 | 32842 | h->c.cur_pic.mb_type[xy] = MB_TYPE_SKIP | | |
1919 | MB_TYPE_16x16 | | ||
1920 | MB_TYPE_FORWARD_MV; | ||
1921 | 32842 | goto end; | |
1922 | } | ||
1923 | |||
1924 | 200985 | modb1 = get_bits1(&h->gb); | |
1925 |
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✓ Branch 1 taken 156745 times.
|
200985 | if (modb1) { |
1926 | // like MB_TYPE_B_DIRECT but no vectors coded | ||
1927 | 44240 | mb_type = MB_TYPE_DIRECT2 | MB_TYPE_SKIP | MB_TYPE_BIDIR_MV; | |
1928 | 44240 | cbp = 0; | |
1929 | } else { | ||
1930 | 156745 | modb2 = get_bits1(&h->gb); | |
1931 | 156745 | mb_type = get_vlc2(&h->gb, mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 1); | |
1932 |
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✓ Branch 1 taken 156745 times.
|
156745 | if (mb_type < 0) { |
1933 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "illegal MB_type\n"); | |
1934 | ✗ | return AVERROR_INVALIDDATA; | |
1935 | } | ||
1936 |
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✓ Branch 1 taken 93450 times.
|
156745 | if (modb2) { |
1937 | 63295 | cbp = 0; | |
1938 | } else { | ||
1939 | 93450 | h->c.bdsp.clear_blocks(h->block[0]); | |
1940 | 93450 | cbp = get_bits(&h->gb, 6); | |
1941 | } | ||
1942 | |||
1943 |
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|
156745 | if ((!IS_DIRECT(mb_type)) && cbp) { |
1944 |
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|
67946 | if (get_bits1(&h->gb)) |
1945 | 8567 | ff_set_qscale(&h->c, h->c.qscale + get_bits1(&h->gb) * 4 - 2); | |
1946 | } | ||
1947 | |||
1948 |
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|
156745 | if (!h->c.progressive_sequence) { |
1949 | ✗ | if (cbp) | |
1950 | ✗ | h->c.interlaced_dct = get_bits1(&h->gb); | |
1951 | |||
1952 | ✗ | if (!IS_DIRECT(mb_type) && get_bits1(&h->gb)) { | |
1953 | ✗ | mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; | |
1954 | ✗ | mb_type &= ~MB_TYPE_16x16; | |
1955 | |||
1956 | ✗ | if (HAS_FORWARD_MV(mb_type)) { | |
1957 | ✗ | h->c.field_select[0][0] = get_bits1(&h->gb); | |
1958 | ✗ | h->c.field_select[0][1] = get_bits1(&h->gb); | |
1959 | } | ||
1960 | ✗ | if (HAS_BACKWARD_MV(mb_type)) { | |
1961 | ✗ | h->c.field_select[1][0] = get_bits1(&h->gb); | |
1962 | ✗ | h->c.field_select[1][1] = get_bits1(&h->gb); | |
1963 | } | ||
1964 | } | ||
1965 | } | ||
1966 | |||
1967 | 156745 | h->c.mv_dir = 0; | |
1968 |
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|
156745 | if ((mb_type & (MB_TYPE_DIRECT2 | MB_TYPE_INTERLACED)) == 0) { |
1969 | 116148 | h->c.mv_type = MV_TYPE_16X16; | |
1970 | |||
1971 |
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✓ Branch 1 taken 35007 times.
|
116148 | if (HAS_FORWARD_MV(mb_type)) { |
1972 | 81141 | h->c.mv_dir = MV_DIR_FORWARD; | |
1973 | |||
1974 | 81141 | mx = ff_h263_decode_motion(h, h->c.last_mv[0][0][0], ctx->f_code); | |
1975 | 81141 | my = ff_h263_decode_motion(h, h->c.last_mv[0][0][1], ctx->f_code); | |
1976 | 81141 | h->c.last_mv[0][1][0] = | |
1977 | 81141 | h->c.last_mv[0][0][0] = | |
1978 | 81141 | h->c.mv[0][0][0] = mx; | |
1979 | 81141 | h->c.last_mv[0][1][1] = | |
1980 | 81141 | h->c.last_mv[0][0][1] = | |
1981 | 81141 | h->c.mv[0][0][1] = my; | |
1982 | } | ||
1983 | |||
1984 |
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|
116148 | if (HAS_BACKWARD_MV(mb_type)) { |
1985 | 91821 | h->c.mv_dir |= MV_DIR_BACKWARD; | |
1986 | |||
1987 | 91821 | mx = ff_h263_decode_motion(h, h->c.last_mv[1][0][0], ctx->b_code); | |
1988 | 91821 | my = ff_h263_decode_motion(h, h->c.last_mv[1][0][1], ctx->b_code); | |
1989 | 91821 | h->c.last_mv[1][1][0] = | |
1990 | 91821 | h->c.last_mv[1][0][0] = | |
1991 | 91821 | h->c.mv[1][0][0] = mx; | |
1992 | 91821 | h->c.last_mv[1][1][1] = | |
1993 | 91821 | h->c.last_mv[1][0][1] = | |
1994 | 91821 | h->c.mv[1][0][1] = my; | |
1995 | } | ||
1996 |
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|
40597 | } else if (!IS_DIRECT(mb_type)) { |
1997 | ✗ | h->c.mv_type = MV_TYPE_FIELD; | |
1998 | |||
1999 | ✗ | if (HAS_FORWARD_MV(mb_type)) { | |
2000 | ✗ | h->c.mv_dir = MV_DIR_FORWARD; | |
2001 | |||
2002 | ✗ | for (i = 0; i < 2; i++) { | |
2003 | ✗ | mx = ff_h263_decode_motion(h, h->c.last_mv[0][i][0], ctx->f_code); | |
2004 | ✗ | my = ff_h263_decode_motion(h, h->c.last_mv[0][i][1] / 2, ctx->f_code); | |
2005 | ✗ | h->c.last_mv[0][i][0] = | |
2006 | ✗ | h->c.mv[0][i][0] = mx; | |
2007 | ✗ | h->c.last_mv[0][i][1] = (h->c.mv[0][i][1] = my) * 2; | |
2008 | } | ||
2009 | } | ||
2010 | |||
2011 | ✗ | if (HAS_BACKWARD_MV(mb_type)) { | |
2012 | ✗ | h->c.mv_dir |= MV_DIR_BACKWARD; | |
2013 | |||
2014 | ✗ | for (i = 0; i < 2; i++) { | |
2015 | ✗ | mx = ff_h263_decode_motion(h, h->c.last_mv[1][i][0], ctx->b_code); | |
2016 | ✗ | my = ff_h263_decode_motion(h, h->c.last_mv[1][i][1] / 2, ctx->b_code); | |
2017 | ✗ | h->c.last_mv[1][i][0] = | |
2018 | ✗ | h->c.mv[1][i][0] = mx; | |
2019 | ✗ | h->c.last_mv[1][i][1] = (h->c.mv[1][i][1] = my) * 2; | |
2020 | } | ||
2021 | } | ||
2022 | } | ||
2023 | } | ||
2024 | |||
2025 |
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|
200985 | if (IS_DIRECT(mb_type)) { |
2026 |
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✓ Branch 1 taken 40597 times.
|
84837 | if (IS_SKIP(mb_type)) { |
2027 | 44240 | mx = | |
2028 | 44240 | my = 0; | |
2029 | } else { | ||
2030 | 40597 | mx = ff_h263_decode_motion(h, 0, 1); | |
2031 | 40597 | my = ff_h263_decode_motion(h, 0, 1); | |
2032 | } | ||
2033 | |||
2034 | 84837 | h->c.mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT; | |
2035 | 84837 | mb_type |= ff_mpeg4_set_direct_mv(&h->c, mx, my); | |
2036 | } | ||
2037 | 200985 | h->c.cur_pic.mb_type[xy] = mb_type; | |
2038 | } else { /* I-Frame */ | ||
2039 | int use_intra_dc_vlc; | ||
2040 | |||
2041 | do { | ||
2042 | 135575 | cbpc = get_vlc2(&h->gb, ff_h263_intra_MCBPC_vlc, INTRA_MCBPC_VLC_BITS, 2); | |
2043 |
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✓ Branch 1 taken 135575 times.
|
135575 | if (cbpc < 0) { |
2044 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
2045 | "I cbpc damaged at %d %d\n", h->c.mb_x, h->c.mb_y); | ||
2046 | ✗ | return AVERROR_INVALIDDATA; | |
2047 | } | ||
2048 |
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✓ Branch 1 taken 135575 times.
|
135575 | } while (cbpc == 8); |
2049 | |||
2050 | 135575 | dquant = cbpc & 4; | |
2051 | 135575 | h->c.mb_intra = 1; | |
2052 | |||
2053 | 164593 | intra: | |
2054 | 164593 | h->c.ac_pred = get_bits1(&h->gb); | |
2055 |
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✓ Branch 1 taken 164041 times.
|
164593 | if (h->c.ac_pred) |
2056 | 552 | h->c.cur_pic.mb_type[xy] = MB_TYPE_INTRA | MB_TYPE_ACPRED; | |
2057 | else | ||
2058 | 164041 | h->c.cur_pic.mb_type[xy] = MB_TYPE_INTRA; | |
2059 | |||
2060 | 164593 | cbpy = get_vlc2(&h->gb, ff_h263_cbpy_vlc, CBPY_VLC_BITS, 1); | |
2061 |
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✓ Branch 1 taken 164593 times.
|
164593 | if (cbpy < 0) { |
2062 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
2063 | "I cbpy damaged at %d %d\n", h->c.mb_x, h->c.mb_y); | ||
2064 | ✗ | return AVERROR_INVALIDDATA; | |
2065 | } | ||
2066 | 164593 | cbp = (cbpc & 3) | (cbpy << 2); | |
2067 | |||
2068 | 164593 | use_intra_dc_vlc = h->c.qscale < ctx->intra_dc_threshold; | |
2069 | |||
2070 |
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✓ Branch 1 taken 155697 times.
|
164593 | if (dquant) |
2071 | 8896 | ff_set_qscale(&h->c, h->c.qscale + quant_tab[get_bits(&h->gb, 2)]); | |
2072 | |||
2073 |
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✓ Branch 1 taken 164593 times.
|
164593 | if (!h->c.progressive_sequence) |
2074 | ✗ | h->c.interlaced_dct = get_bits1(&h->gb); | |
2075 | |||
2076 | 164593 | h->c.bdsp.clear_blocks(h->block[0]); | |
2077 | /* decode each block */ | ||
2078 |
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✓ Branch 1 taken 164593 times.
|
1152151 | for (i = 0; i < 6; i++) { |
2079 |
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✓ Branch 2 taken 987558 times.
|
987558 | if (mpeg4_decode_block(ctx, h->block[i], i, cbp & 32, |
2080 | 1, use_intra_dc_vlc, 0) < 0) | ||
2081 | ✗ | return AVERROR_INVALIDDATA; | |
2082 | 987558 | cbp += cbp; | |
2083 | } | ||
2084 | 164593 | goto end; | |
2085 | } | ||
2086 | |||
2087 | /* decode each block */ | ||
2088 |
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✓ Branch 1 taken 1036934 times.
|
7258538 | for (i = 0; i < 6; i++) { |
2089 |
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✓ Branch 2 taken 6221604 times.
|
6221604 | if (mpeg4_decode_block(ctx, h->block[i], i, cbp & 32, 0, 0, 0) < 0) |
2090 | ✗ | return AVERROR_INVALIDDATA; | |
2091 | 6221604 | cbp += cbp; | |
2092 | } | ||
2093 | |||
2094 | 1036934 | end: | |
2095 | /* per-MB end of slice check */ | ||
2096 | 1372492 | next = mpeg4_is_resync(ctx); | |
2097 |
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✓ Branch 1 taken 1358989 times.
|
1372492 | if (next) { |
2098 |
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✗ Branch 2 not taken.
✓ Branch 3 taken 5 times.
|
13503 | if (h->c.mb_x + h->c.mb_y*h->c.mb_width + 1 > next && (h->c.avctx->err_recognition & AV_EF_AGGRESSIVE)) { |
2099 | ✗ | return AVERROR_INVALIDDATA; | |
2100 |
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✓ Branch 1 taken 7944 times.
|
13503 | } else if (h->c.mb_x + h->c.mb_y*h->c.mb_width + 1 >= next) |
2101 | 5559 | return SLICE_END; | |
2102 | |||
2103 |
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✗ Branch 1 not taken.
|
7944 | if (h->c.pict_type == AV_PICTURE_TYPE_B) { |
2104 |
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✓ Branch 1 taken 7776 times.
|
7944 | const int delta = h->c.mb_x + 1 == h->c.mb_width ? 2 : 1; |
2105 | 7944 | ff_thread_progress_await(&h->c.next_pic.ptr->progress, | |
2106 |
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✓ Branch 1 taken 7776 times.
|
7944 | (h->c.mb_x + delta >= h->c.mb_width) |
2107 |
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✓ Branch 1 taken 168 times.
|
168 | ? FFMIN(h->c.mb_y + 1, h->c.mb_height - 1) |
2108 | : h->c.mb_y); | ||
2109 |
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✗ Branch 1 not taken.
|
7944 | if (h->c.next_pic.mbskip_table[xy + delta]) |
2110 | 7944 | return SLICE_OK; | |
2111 | } | ||
2112 | |||
2113 | ✗ | return SLICE_END; | |
2114 | } | ||
2115 | |||
2116 | 1358989 | return SLICE_OK; | |
2117 | } | ||
2118 | |||
2119 | /* As per spec, studio start code search isn't the same as the old type of start code */ | ||
2120 | 34 | static void next_start_code_studio(GetBitContext *gb) | |
2121 | { | ||
2122 | 34 | align_get_bits(gb); | |
2123 | |||
2124 |
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|
34 | while (get_bits_left(gb) >= 24 && show_bits(gb, 24) != 0x1) { |
2125 | ✗ | get_bits(gb, 8); | |
2126 | } | ||
2127 | 34 | } | |
2128 | |||
2129 | /* additional_code, vlc index */ | ||
2130 | static const uint8_t ac_state_tab[22][2] = | ||
2131 | { | ||
2132 | {0, 0}, | ||
2133 | {0, 1}, | ||
2134 | {1, 1}, | ||
2135 | {2, 1}, | ||
2136 | {3, 1}, | ||
2137 | {4, 1}, | ||
2138 | {5, 1}, | ||
2139 | {1, 2}, | ||
2140 | {2, 2}, | ||
2141 | {3, 2}, | ||
2142 | {4, 2}, | ||
2143 | {5, 2}, | ||
2144 | {6, 2}, | ||
2145 | {1, 3}, | ||
2146 | {2, 4}, | ||
2147 | {3, 5}, | ||
2148 | {4, 6}, | ||
2149 | {5, 7}, | ||
2150 | {6, 8}, | ||
2151 | {7, 9}, | ||
2152 | {8, 10}, | ||
2153 | {0, 11} | ||
2154 | }; | ||
2155 | |||
2156 | 5336 | static int mpeg4_decode_studio_block(Mpeg4DecContext *const ctx, int32_t block[64], int n) | |
2157 | { | ||
2158 | 5336 | H263DecContext *const h = &ctx->h; | |
2159 | |||
2160 | 5336 | int cc, dct_dc_size, dct_diff, code, j, idx = 1, group = 0, run = 0, | |
2161 | additional_code_len, sign, mismatch; | ||
2162 | 5336 | const VLCElem *cur_vlc = studio_intra_tab[0]; | |
2163 | 5336 | const uint8_t *const scantable = h->c.intra_scantable.permutated; | |
2164 | const uint16_t *quant_matrix; | ||
2165 | uint32_t flc; | ||
2166 | 5336 | const int min = -1 * (1 << (h->c.avctx->bits_per_raw_sample + 6)); | |
2167 | 5336 | const int max = ((1 << (h->c.avctx->bits_per_raw_sample + 6)) - 1); | |
2168 | 5336 | int shift = 3 - ctx->dct_precision; | |
2169 | |||
2170 | 5336 | mismatch = 1; | |
2171 | |||
2172 | 5336 | memset(block, 0, 64 * sizeof(int32_t)); | |
2173 | |||
2174 |
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|
5336 | if (n < 4) { |
2175 | 2668 | cc = 0; | |
2176 | 2668 | dct_dc_size = get_vlc2(&h->gb, studio_luma_dc, STUDIO_INTRA_BITS, 2); | |
2177 | 2668 | quant_matrix = h->c.intra_matrix; | |
2178 | } else { | ||
2179 | 2668 | cc = (n & 1) + 1; | |
2180 |
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✓ Branch 1 taken 2668 times.
|
2668 | if (ctx->rgb) |
2181 | ✗ | dct_dc_size = get_vlc2(&h->gb, studio_luma_dc, STUDIO_INTRA_BITS, 2); | |
2182 | else | ||
2183 | 2668 | dct_dc_size = get_vlc2(&h->gb, studio_chroma_dc, STUDIO_INTRA_BITS, 2); | |
2184 | 2668 | quant_matrix = h->c.chroma_intra_matrix; | |
2185 | } | ||
2186 | |||
2187 |
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|
5336 | if (dct_dc_size == 0) { |
2188 | 242 | dct_diff = 0; | |
2189 | } else { | ||
2190 | 5094 | dct_diff = get_xbits(&h->gb, dct_dc_size); | |
2191 | |||
2192 |
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|
5094 | if (dct_dc_size > 8) { |
2193 |
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|
227 | if(!check_marker(h->c.avctx, &h->gb, "dct_dc_size > 8")) |
2194 | ✗ | return AVERROR_INVALIDDATA; | |
2195 | } | ||
2196 | |||
2197 | } | ||
2198 | |||
2199 | 5336 | h->c.last_dc[cc] += dct_diff; | |
2200 | |||
2201 |
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|
5336 | if (ctx->mpeg_quant) |
2202 | ✗ | block[0] = h->c.last_dc[cc] * (8 >> h->c.intra_dc_precision); | |
2203 | else | ||
2204 | 5336 | block[0] = h->c.last_dc[cc] * (8 >> h->c.intra_dc_precision) * (8 >> ctx->dct_precision); | |
2205 | /* TODO: support mpeg_quant for AC coefficients */ | ||
2206 | |||
2207 | 5336 | block[0] = av_clip(block[0], min, max); | |
2208 | 5336 | mismatch ^= block[0]; | |
2209 | |||
2210 | /* AC Coefficients */ | ||
2211 | while (1) { | ||
2212 | 33424 | group = get_vlc2(&h->gb, cur_vlc, STUDIO_INTRA_BITS, 2); | |
2213 | |||
2214 |
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✓ Branch 1 taken 33424 times.
|
33424 | if (group < 0) { |
2215 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "illegal ac coefficient group vlc\n"); | |
2216 | ✗ | return AVERROR_INVALIDDATA; | |
2217 | } | ||
2218 | |||
2219 | 33424 | additional_code_len = ac_state_tab[group][0]; | |
2220 | 33424 | cur_vlc = studio_intra_tab[ac_state_tab[group][1]]; | |
2221 | |||
2222 |
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✓ Branch 1 taken 28088 times.
|
33424 | if (group == 0) { |
2223 | /* End of Block */ | ||
2224 | 5336 | break; | |
2225 |
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|
28088 | } else if (group >= 1 && group <= 6) { |
2226 | /* Zero run length (Table B.47) */ | ||
2227 | 2347 | run = 1 << additional_code_len; | |
2228 |
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|
2347 | if (additional_code_len) |
2229 | 927 | run += get_bits(&h->gb, additional_code_len); | |
2230 | 2347 | idx += run; | |
2231 | 2347 | continue; | |
2232 |
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|
25741 | } else if (group >= 7 && group <= 12) { |
2233 | /* Zero run length and +/-1 level (Table B.48) */ | ||
2234 | 6045 | code = get_bits(&h->gb, additional_code_len); | |
2235 | 6045 | sign = code & 1; | |
2236 | 6045 | code >>= 1; | |
2237 | 6045 | run = (1 << (additional_code_len - 1)) + code; | |
2238 | 6045 | idx += run; | |
2239 |
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|
6045 | if (idx > 63) |
2240 | ✗ | return AVERROR_INVALIDDATA; | |
2241 | 6045 | j = scantable[idx++]; | |
2242 |
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|
6045 | block[j] = sign ? 1 : -1; |
2243 |
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|
19696 | } else if (group >= 13 && group <= 20) { |
2244 | /* Level value (Table B.49) */ | ||
2245 |
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✓ Branch 1 taken 19696 times.
|
19696 | if (idx > 63) |
2246 | ✗ | return AVERROR_INVALIDDATA; | |
2247 | 19696 | j = scantable[idx++]; | |
2248 | 19696 | block[j] = get_xbits(&h->gb, additional_code_len); | |
2249 | ✗ | } else if (group == 21) { | |
2250 | /* Escape */ | ||
2251 | ✗ | if (idx > 63) | |
2252 | ✗ | return AVERROR_INVALIDDATA; | |
2253 | ✗ | j = scantable[idx++]; | |
2254 | ✗ | additional_code_len = h->c.avctx->bits_per_raw_sample + ctx->dct_precision + 4; | |
2255 | ✗ | flc = get_bits(&h->gb, additional_code_len); | |
2256 | ✗ | if (flc >> (additional_code_len-1)) | |
2257 | ✗ | block[j] = -1 * (( flc ^ ((1 << additional_code_len) -1)) + 1); | |
2258 | else | ||
2259 | ✗ | block[j] = flc; | |
2260 | } | ||
2261 | 25741 | block[j] = ((block[j] * quant_matrix[j] * h->c.qscale) * (1 << shift)) / 16; | |
2262 | 25741 | block[j] = av_clip(block[j], min, max); | |
2263 | 25741 | mismatch ^= block[j]; | |
2264 | } | ||
2265 | |||
2266 | 5336 | block[63] ^= mismatch & 1; | |
2267 | |||
2268 | 5336 | return 0; | |
2269 | } | ||
2270 | |||
2271 | 2049 | static int mpeg4_decode_dpcm_macroblock(Mpeg4DecContext *const ctx, | |
2272 | int16_t macroblock[256], int n) | ||
2273 | { | ||
2274 | 2049 | H263DecContext *const h = &ctx->h; | |
2275 | 2049 | int j, w, height, idx = 0; | |
2276 | int block_mean, rice_parameter, rice_prefix_code, rice_suffix_code, | ||
2277 | dpcm_residual, left, top, topleft, min_left_top, max_left_top, p, p2, output; | ||
2278 |
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|
2049 | height = 16 >> (n ? h->c.chroma_y_shift : 0); |
2279 |
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✓ Branch 1 taken 683 times.
|
2049 | w = 16 >> (n ? h->c.chroma_x_shift : 0); |
2280 | |||
2281 | 2049 | block_mean = get_bits(&h->gb, h->c.avctx->bits_per_raw_sample); | |
2282 |
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✓ Branch 1 taken 2049 times.
|
2049 | if (block_mean == 0){ |
2283 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "Forbidden block_mean\n"); | |
2284 | ✗ | return AVERROR_INVALIDDATA; | |
2285 | } | ||
2286 | 2049 | h->c.last_dc[n] = block_mean * (1 << (ctx->dct_precision + h->c.intra_dc_precision)); | |
2287 | |||
2288 | 2049 | rice_parameter = get_bits(&h->gb, 4); | |
2289 |
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|
2049 | if (rice_parameter == 0) { |
2290 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "Forbidden rice_parameter\n"); | |
2291 | ✗ | return AVERROR_INVALIDDATA; | |
2292 | } | ||
2293 | |||
2294 |
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|
2049 | if (rice_parameter == 15) |
2295 | 329 | rice_parameter = 0; | |
2296 | |||
2297 |
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|
2049 | if (rice_parameter > 11) { |
2298 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "Forbidden rice_parameter\n"); | |
2299 | ✗ | return AVERROR_INVALIDDATA; | |
2300 | } | ||
2301 | |||
2302 |
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|
34833 | for (int i = 0; i < height; i++) { |
2303 | 32784 | output = 1 << (h->c.avctx->bits_per_raw_sample - 1); | |
2304 | 32784 | top = 1 << (h->c.avctx->bits_per_raw_sample - 1); | |
2305 | |||
2306 |
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|
382480 | for (j = 0; j < w; j++) { |
2307 | 349696 | left = output; | |
2308 | 349696 | topleft = top; | |
2309 | |||
2310 | 349696 | rice_prefix_code = get_unary(&h->gb, 1, 12); | |
2311 | |||
2312 | /* Escape */ | ||
2313 |
2/2✓ Branch 0 taken 3815 times.
✓ Branch 1 taken 345881 times.
|
349696 | if (rice_prefix_code == 11) |
2314 | 3815 | dpcm_residual = get_bits(&h->gb, h->c.avctx->bits_per_raw_sample); | |
2315 | else { | ||
2316 |
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✓ Branch 1 taken 345881 times.
|
345881 | if (rice_prefix_code == 12) { |
2317 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "Forbidden rice_prefix_code\n"); | |
2318 | ✗ | return AVERROR_INVALIDDATA; | |
2319 | } | ||
2320 | 345881 | rice_suffix_code = get_bitsz(&h->gb, rice_parameter); | |
2321 | 345881 | dpcm_residual = (rice_prefix_code << rice_parameter) + rice_suffix_code; | |
2322 | } | ||
2323 | |||
2324 | /* Map to a signed residual */ | ||
2325 |
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✓ Branch 1 taken 254904 times.
|
349696 | if (dpcm_residual & 1) |
2326 | 94792 | dpcm_residual = (-1 * dpcm_residual) >> 1; | |
2327 | else | ||
2328 | 254904 | dpcm_residual = (dpcm_residual >> 1); | |
2329 | |||
2330 |
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✓ Branch 1 taken 21856 times.
|
349696 | if (i != 0) |
2331 | 327840 | top = macroblock[idx-w]; | |
2332 | |||
2333 | 349696 | p = left + top - topleft; | |
2334 | 349696 | min_left_top = FFMIN(left, top); | |
2335 |
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✓ Branch 1 taken 305193 times.
|
349696 | if (p < min_left_top) |
2336 | 44503 | p = min_left_top; | |
2337 | |||
2338 | 349696 | max_left_top = FFMAX(left, top); | |
2339 |
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✓ Branch 1 taken 307013 times.
|
349696 | if (p > max_left_top) |
2340 | 42683 | p = max_left_top; | |
2341 | |||
2342 | 349696 | p2 = (FFMIN(min_left_top, topleft) + FFMAX(max_left_top, topleft)) >> 1; | |
2343 |
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✓ Branch 1 taken 282502 times.
|
349696 | if (p2 == p) |
2344 | 67194 | p2 = block_mean; | |
2345 | |||
2346 |
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✓ Branch 1 taken 174958 times.
|
349696 | if (p2 > p) |
2347 | 174738 | dpcm_residual *= -1; | |
2348 | |||
2349 | 349696 | macroblock[idx++] = output = (dpcm_residual + p) & ((1 << h->c.avctx->bits_per_raw_sample) - 1); | |
2350 | } | ||
2351 | } | ||
2352 | |||
2353 | 2049 | return 0; | |
2354 | } | ||
2355 | |||
2356 | 1350 | static int mpeg4_decode_studio_mb(H263DecContext *const h) | |
2357 | { | ||
2358 | 1350 | Mpeg4DecContext *const ctx = h263_to_mpeg4(h); | |
2359 | int i; | ||
2360 | |||
2361 | 1350 | ctx->dpcm_direction = 0; | |
2362 | |||
2363 | /* StudioMacroblock */ | ||
2364 | /* Assumes I-VOP */ | ||
2365 | 1350 | h->c.mb_intra = 1; | |
2366 |
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✓ Branch 2 taken 683 times.
|
1350 | if (get_bits1(&h->gb)) { /* compression_mode */ |
2367 | /* DCT */ | ||
2368 | /* macroblock_type, 1 or 2-bit VLC */ | ||
2369 |
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✓ Branch 2 taken 667 times.
|
667 | if (!get_bits1(&h->gb)) { |
2370 | ✗ | skip_bits1(&h->gb); | |
2371 | ✗ | h->c.qscale = mpeg_get_qscale(&h->gb, h->c.q_scale_type); | |
2372 | } | ||
2373 | |||
2374 |
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|
6003 | for (i = 0; i < mpeg4_block_count[h->c.chroma_format]; i++) { |
2375 |
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✓ Branch 2 taken 5336 times.
|
5336 | if (mpeg4_decode_studio_block(ctx, ctx->block32[i], i) < 0) |
2376 | ✗ | return AVERROR_INVALIDDATA; | |
2377 | } | ||
2378 | } else { | ||
2379 | /* DPCM */ | ||
2380 | 683 | check_marker(h->c.avctx, &h->gb, "DPCM block start"); | |
2381 |
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✓ Branch 2 taken 683 times.
|
683 | ctx->dpcm_direction = get_bits1(&h->gb) ? -1 : 1; |
2382 |
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|
2732 | for (i = 0; i < 3; i++) { |
2383 |
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✓ Branch 2 taken 2049 times.
|
2049 | if (mpeg4_decode_dpcm_macroblock(ctx, ctx->dpcm_macroblock[i], i) < 0) |
2384 | ✗ | return AVERROR_INVALIDDATA; | |
2385 | } | ||
2386 | } | ||
2387 | |||
2388 |
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1350 | if (get_bits_left(&h->gb) >= 24 && show_bits(&h->gb, 23) == 0) { |
2389 | 29 | next_start_code_studio(&h->gb); | |
2390 | 29 | return SLICE_END; | |
2391 | } | ||
2392 | |||
2393 | //vcon-stp9L1.bits (first frame) | ||
2394 |
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|
1321 | if (get_bits_left(&h->gb) == 0) |
2395 | ✗ | return SLICE_END; | |
2396 | |||
2397 | //vcon-stp2L1.bits, vcon-stp3L1.bits, vcon-stp6L1.bits, vcon-stp7L1.bits, vcon-stp8L1.bits, vcon-stp10L1.bits (first frame) | ||
2398 |
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1321 | if (get_bits_left(&h->gb) < 8U && show_bits(&h->gb, get_bits_left(&h->gb)) == 0) |
2399 | 1 | return SLICE_END; | |
2400 | |||
2401 | 1320 | return SLICE_OK; | |
2402 | } | ||
2403 | |||
2404 | 973 | static int mpeg4_decode_gop_header(MpegEncContext *s, GetBitContext *gb) | |
2405 | { | ||
2406 | int hours, minutes, seconds; | ||
2407 | |||
2408 |
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973 | if (!show_bits(gb, 23)) { |
2409 | ✗ | av_log(s->avctx, AV_LOG_WARNING, "GOP header invalid\n"); | |
2410 | ✗ | return AVERROR_INVALIDDATA; | |
2411 | } | ||
2412 | |||
2413 | 973 | hours = get_bits(gb, 5); | |
2414 | 973 | minutes = get_bits(gb, 6); | |
2415 | 973 | check_marker(s->avctx, gb, "in gop_header"); | |
2416 | 973 | seconds = get_bits(gb, 6); | |
2417 | |||
2418 | 973 | s->time_base = seconds + 60*(minutes + 60*hours); | |
2419 | |||
2420 | 973 | skip_bits1(gb); | |
2421 | 973 | skip_bits1(gb); | |
2422 | |||
2423 | 973 | return 0; | |
2424 | } | ||
2425 | |||
2426 | 1166 | static int mpeg4_decode_profile_level(MpegEncContext *s, GetBitContext *gb, int *profile, int *level) | |
2427 | { | ||
2428 | |||
2429 | 1166 | *profile = get_bits(gb, 4); | |
2430 | 1166 | *level = get_bits(gb, 4); | |
2431 | |||
2432 | // for Simple profile, level 0 | ||
2433 |
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1166 | if (*profile == 0 && *level == 8) { |
2434 | ✗ | *level = 0; | |
2435 | } | ||
2436 | |||
2437 | 1166 | return 0; | |
2438 | } | ||
2439 | |||
2440 | 1166 | static int mpeg4_decode_visual_object(MpegEncContext *s, GetBitContext *gb) | |
2441 | { | ||
2442 | int visual_object_type; | ||
2443 | 1166 | int is_visual_object_identifier = get_bits1(gb); | |
2444 | |||
2445 |
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1166 | if (is_visual_object_identifier) { |
2446 | 1140 | skip_bits(gb, 4+3); | |
2447 | } | ||
2448 | 1166 | visual_object_type = get_bits(gb, 4); | |
2449 | |||
2450 |
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1166 | if (visual_object_type == VOT_VIDEO_ID || |
2451 | visual_object_type == VOT_STILL_TEXTURE_ID) { | ||
2452 | 1166 | int video_signal_type = get_bits1(gb); | |
2453 |
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1166 | if (video_signal_type) { |
2454 | int video_range, color_description; | ||
2455 | ✗ | skip_bits(gb, 3); // video_format | |
2456 | ✗ | video_range = get_bits1(gb); | |
2457 | ✗ | color_description = get_bits1(gb); | |
2458 | |||
2459 | ✗ | s->avctx->color_range = video_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG; | |
2460 | |||
2461 | ✗ | if (color_description) { | |
2462 | ✗ | s->avctx->color_primaries = get_bits(gb, 8); | |
2463 | ✗ | s->avctx->color_trc = get_bits(gb, 8); | |
2464 | ✗ | s->avctx->colorspace = get_bits(gb, 8); | |
2465 | } | ||
2466 | } | ||
2467 | } | ||
2468 | |||
2469 | 1166 | return 0; | |
2470 | } | ||
2471 | |||
2472 | 110 | static void mpeg4_load_default_matrices(MpegEncContext *s) | |
2473 | { | ||
2474 | int i, v; | ||
2475 | |||
2476 | /* load default matrices */ | ||
2477 |
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7150 | for (i = 0; i < 64; i++) { |
2478 | 7040 | int j = s->idsp.idct_permutation[i]; | |
2479 | 7040 | v = ff_mpeg4_default_intra_matrix[i]; | |
2480 | 7040 | s->intra_matrix[j] = v; | |
2481 | 7040 | s->chroma_intra_matrix[j] = v; | |
2482 | |||
2483 | 7040 | v = ff_mpeg4_default_non_intra_matrix[i]; | |
2484 | 7040 | s->inter_matrix[j] = v; | |
2485 | 7040 | s->chroma_inter_matrix[j] = v; | |
2486 | } | ||
2487 | 110 | } | |
2488 | |||
2489 | ✗ | static int read_quant_matrix_ext(MpegEncContext *s, GetBitContext *gb) | |
2490 | { | ||
2491 | int i, j, v; | ||
2492 | |||
2493 | ✗ | if (get_bits1(gb)) { | |
2494 | ✗ | if (get_bits_left(gb) < 64*8) | |
2495 | ✗ | return AVERROR_INVALIDDATA; | |
2496 | /* intra_quantiser_matrix */ | ||
2497 | ✗ | for (i = 0; i < 64; i++) { | |
2498 | ✗ | v = get_bits(gb, 8); | |
2499 | ✗ | j = s->idsp.idct_permutation[ff_zigzag_direct[i]]; | |
2500 | ✗ | s->intra_matrix[j] = v; | |
2501 | ✗ | s->chroma_intra_matrix[j] = v; | |
2502 | } | ||
2503 | } | ||
2504 | |||
2505 | ✗ | if (get_bits1(gb)) { | |
2506 | ✗ | if (get_bits_left(gb) < 64*8) | |
2507 | ✗ | return AVERROR_INVALIDDATA; | |
2508 | /* non_intra_quantiser_matrix */ | ||
2509 | ✗ | for (i = 0; i < 64; i++) { | |
2510 | ✗ | get_bits(gb, 8); | |
2511 | } | ||
2512 | } | ||
2513 | |||
2514 | ✗ | if (get_bits1(gb)) { | |
2515 | ✗ | if (get_bits_left(gb) < 64*8) | |
2516 | ✗ | return AVERROR_INVALIDDATA; | |
2517 | /* chroma_intra_quantiser_matrix */ | ||
2518 | ✗ | for (i = 0; i < 64; i++) { | |
2519 | ✗ | v = get_bits(gb, 8); | |
2520 | ✗ | j = s->idsp.idct_permutation[ff_zigzag_direct[i]]; | |
2521 | ✗ | s->chroma_intra_matrix[j] = v; | |
2522 | } | ||
2523 | } | ||
2524 | |||
2525 | ✗ | if (get_bits1(gb)) { | |
2526 | ✗ | if (get_bits_left(gb) < 64*8) | |
2527 | ✗ | return AVERROR_INVALIDDATA; | |
2528 | /* chroma_non_intra_quantiser_matrix */ | ||
2529 | ✗ | for (i = 0; i < 64; i++) { | |
2530 | ✗ | get_bits(gb, 8); | |
2531 | } | ||
2532 | } | ||
2533 | |||
2534 | ✗ | next_start_code_studio(gb); | |
2535 | ✗ | return 0; | |
2536 | } | ||
2537 | |||
2538 | 5 | static void extension_and_user_data(MpegEncContext *s, GetBitContext *gb, int id) | |
2539 | { | ||
2540 | uint32_t startcode; | ||
2541 | uint8_t extension_type; | ||
2542 | |||
2543 | 5 | startcode = show_bits_long(gb, 32); | |
2544 |
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5 | if (startcode == USER_DATA_STARTCODE || startcode == EXT_STARTCODE) { |
2545 | |||
2546 | ✗ | if ((id == 2 || id == 4) && startcode == EXT_STARTCODE) { | |
2547 | ✗ | skip_bits_long(gb, 32); | |
2548 | ✗ | extension_type = get_bits(gb, 4); | |
2549 | ✗ | if (extension_type == QUANT_MATRIX_EXT_ID) | |
2550 | ✗ | read_quant_matrix_ext(s, gb); | |
2551 | } | ||
2552 | } | ||
2553 | 5 | } | |
2554 | |||
2555 | 3 | static int decode_studio_vol_header(Mpeg4DecContext *ctx, GetBitContext *gb) | |
2556 | { | ||
2557 | 3 | MPVContext *const s = &ctx->h.c; | |
2558 | int width, height, aspect_ratio_info; | ||
2559 | int bits_per_raw_sample; | ||
2560 | int rgb, chroma_format; | ||
2561 | |||
2562 | // random_accessible_vol and video_object_type_indication have already | ||
2563 | // been read by the caller decode_vol_header() | ||
2564 | 3 | skip_bits(gb, 4); /* video_object_layer_verid */ | |
2565 | 3 | ctx->shape = get_bits(gb, 2); /* video_object_layer_shape */ | |
2566 | 3 | skip_bits(gb, 4); /* video_object_layer_shape_extension */ | |
2567 | 3 | skip_bits1(gb); /* progressive_sequence */ | |
2568 |
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3 | if (ctx->shape != RECT_SHAPE) { |
2569 | ✗ | avpriv_request_sample(s->avctx, "MPEG-4 Studio profile non rectangular shape"); | |
2570 | ✗ | return AVERROR_PATCHWELCOME; | |
2571 | } | ||
2572 |
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3 | if (ctx->shape != BIN_ONLY_SHAPE) { |
2573 | 3 | rgb = get_bits1(gb); /* rgb_components */ | |
2574 | 3 | chroma_format = get_bits(gb, 2); /* chroma_format */ | |
2575 |
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3 | if (!chroma_format || chroma_format == CHROMA_420 || (rgb && chroma_format == CHROMA_422)) { |
2576 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "illegal chroma format\n"); | |
2577 | ✗ | return AVERROR_INVALIDDATA; | |
2578 | } | ||
2579 | |||
2580 | 3 | bits_per_raw_sample = get_bits(gb, 4); /* bit_depth */ | |
2581 |
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3 | if (bits_per_raw_sample == 10) { |
2582 |
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3 | if (rgb) { |
2583 | ✗ | s->avctx->pix_fmt = AV_PIX_FMT_GBRP10; | |
2584 | } else { | ||
2585 |
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3 | s->avctx->pix_fmt = chroma_format == CHROMA_422 ? AV_PIX_FMT_YUV422P10 : AV_PIX_FMT_YUV444P10; |
2586 | } | ||
2587 | } else { | ||
2588 | ✗ | avpriv_request_sample(s->avctx, "MPEG-4 Studio profile bit-depth %u", bits_per_raw_sample); | |
2589 | ✗ | return AVERROR_PATCHWELCOME; | |
2590 | } | ||
2591 |
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3 | if (rgb != ctx->rgb || s->chroma_format != chroma_format) |
2592 | 2 | s->context_reinit = 1; | |
2593 | 3 | s->avctx->bits_per_raw_sample = bits_per_raw_sample; | |
2594 | 3 | ctx->rgb = rgb; | |
2595 | 3 | s->chroma_format = chroma_format; | |
2596 | } | ||
2597 |
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3 | if (ctx->shape == RECT_SHAPE) { |
2598 | 3 | check_marker(s->avctx, gb, "before video_object_layer_width"); | |
2599 | 3 | width = get_bits(gb, 14); /* video_object_layer_width */ | |
2600 | 3 | check_marker(s->avctx, gb, "before video_object_layer_height"); | |
2601 | 3 | height = get_bits(gb, 14); /* video_object_layer_height */ | |
2602 | 3 | check_marker(s->avctx, gb, "after video_object_layer_height"); | |
2603 | |||
2604 | /* Do the same check as non-studio profile */ | ||
2605 |
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3 | if (width && height) { |
2606 |
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3 | if (s->width && s->height && |
2607 |
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2 | (s->width != width || s->height != height)) |
2608 | ✗ | s->context_reinit = 1; | |
2609 | 3 | s->width = width; | |
2610 | 3 | s->height = height; | |
2611 | } | ||
2612 | } | ||
2613 | 3 | aspect_ratio_info = get_bits(gb, 4); | |
2614 |
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3 | if (aspect_ratio_info == FF_ASPECT_EXTENDED) { |
2615 | ✗ | s->avctx->sample_aspect_ratio.num = get_bits(gb, 8); // par_width | |
2616 | ✗ | s->avctx->sample_aspect_ratio.den = get_bits(gb, 8); // par_height | |
2617 | } else { | ||
2618 | 3 | s->avctx->sample_aspect_ratio = ff_h263_pixel_aspect[aspect_ratio_info]; | |
2619 | } | ||
2620 | 3 | skip_bits(gb, 4); /* frame_rate_code */ | |
2621 | 3 | skip_bits(gb, 15); /* first_half_bit_rate */ | |
2622 | 3 | check_marker(s->avctx, gb, "after first_half_bit_rate"); | |
2623 | 3 | skip_bits(gb, 15); /* latter_half_bit_rate */ | |
2624 | 3 | check_marker(s->avctx, gb, "after latter_half_bit_rate"); | |
2625 | 3 | skip_bits(gb, 15); /* first_half_vbv_buffer_size */ | |
2626 | 3 | check_marker(s->avctx, gb, "after first_half_vbv_buffer_size"); | |
2627 | 3 | skip_bits(gb, 3); /* latter_half_vbv_buffer_size */ | |
2628 | 3 | skip_bits(gb, 11); /* first_half_vbv_buffer_size */ | |
2629 | 3 | check_marker(s->avctx, gb, "after first_half_vbv_buffer_size"); | |
2630 | 3 | skip_bits(gb, 15); /* latter_half_vbv_occupancy */ | |
2631 | 3 | check_marker(s->avctx, gb, "after latter_half_vbv_occupancy"); | |
2632 | 3 | s->low_delay = get_bits1(gb); | |
2633 | 3 | ctx->mpeg_quant = get_bits1(gb); /* mpeg2_stream */ | |
2634 | |||
2635 | 3 | next_start_code_studio(gb); | |
2636 | 3 | extension_and_user_data(s, gb, 2); | |
2637 | |||
2638 | 3 | return 0; | |
2639 | } | ||
2640 | |||
2641 | 1199 | static int decode_vol_header(Mpeg4DecContext *ctx, GetBitContext *gb) | |
2642 | { | ||
2643 | 1199 | H263DecContext *const h = &ctx->h; | |
2644 | int width, height, vo_ver_id, aspect_ratio_info; | ||
2645 | |||
2646 | /* vol header */ | ||
2647 | 1199 | skip_bits(gb, 1); /* random access */ | |
2648 | 1199 | ctx->vo_type = get_bits(gb, 8); | |
2649 | |||
2650 | /* If we are in studio profile (per vo_type), check if its all consistent | ||
2651 | * and if so continue pass control to decode_studio_vol_header(). | ||
2652 | * elIf something is inconsistent, error out | ||
2653 | * else continue with (non studio) vol header decpoding. | ||
2654 | */ | ||
2655 |
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1199 | if (ctx->vo_type == CORE_STUDIO_VO_TYPE || |
2656 |
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1196 | ctx->vo_type == SIMPLE_STUDIO_VO_TYPE) { |
2657 |
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3 | if (h->c.avctx->profile != AV_PROFILE_UNKNOWN && h->c.avctx->profile != AV_PROFILE_MPEG4_SIMPLE_STUDIO) |
2658 | ✗ | return AVERROR_INVALIDDATA; | |
2659 | 3 | h->c.studio_profile = 1; | |
2660 | 3 | h->c.avctx->profile = AV_PROFILE_MPEG4_SIMPLE_STUDIO; | |
2661 | 3 | return decode_studio_vol_header(ctx, gb); | |
2662 |
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1196 | } else if (h->c.studio_profile) { |
2663 | ✗ | return AVERROR_PATCHWELCOME; | |
2664 | } | ||
2665 | |||
2666 |
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1196 | if (get_bits1(gb) != 0) { /* is_ol_id */ |
2667 | 1168 | vo_ver_id = get_bits(gb, 4); /* vo_ver_id */ | |
2668 | 1168 | skip_bits(gb, 3); /* vo_priority */ | |
2669 | } else { | ||
2670 | 28 | vo_ver_id = 1; | |
2671 | } | ||
2672 | 1196 | aspect_ratio_info = get_bits(gb, 4); | |
2673 |
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1196 | if (aspect_ratio_info == FF_ASPECT_EXTENDED) { |
2674 | 2 | h->c.avctx->sample_aspect_ratio.num = get_bits(gb, 8); // par_width | |
2675 | 2 | h->c.avctx->sample_aspect_ratio.den = get_bits(gb, 8); // par_height | |
2676 | } else { | ||
2677 | 1194 | h->c.avctx->sample_aspect_ratio = ff_h263_pixel_aspect[aspect_ratio_info]; | |
2678 | } | ||
2679 | |||
2680 |
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1196 | if ((ctx->vol_control_parameters = get_bits1(gb))) { /* vol control parameter */ |
2681 | 1159 | int chroma_format = get_bits(gb, 2); | |
2682 |
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1159 | if (chroma_format != CHROMA_420) |
2683 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "illegal chroma format\n"); | |
2684 | |||
2685 | 1159 | h->c.low_delay = get_bits1(gb); | |
2686 |
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1159 | if (get_bits1(gb)) { /* vbv parameters */ |
2687 | ✗ | get_bits(gb, 15); /* first_half_bitrate */ | |
2688 | ✗ | check_marker(h->c.avctx, gb, "after first_half_bitrate"); | |
2689 | ✗ | get_bits(gb, 15); /* latter_half_bitrate */ | |
2690 | ✗ | check_marker(h->c.avctx, gb, "after latter_half_bitrate"); | |
2691 | ✗ | get_bits(gb, 15); /* first_half_vbv_buffer_size */ | |
2692 | ✗ | check_marker(h->c.avctx, gb, "after first_half_vbv_buffer_size"); | |
2693 | ✗ | get_bits(gb, 3); /* latter_half_vbv_buffer_size */ | |
2694 | ✗ | get_bits(gb, 11); /* first_half_vbv_occupancy */ | |
2695 | ✗ | check_marker(h->c.avctx, gb, "after first_half_vbv_occupancy"); | |
2696 | ✗ | get_bits(gb, 15); /* latter_half_vbv_occupancy */ | |
2697 | ✗ | check_marker(h->c.avctx, gb, "after latter_half_vbv_occupancy"); | |
2698 | } | ||
2699 | } else { | ||
2700 | /* is setting low delay flag only once the smartest thing to do? | ||
2701 | * low delay detection will not be overridden. */ | ||
2702 |
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37 | if (h->picture_number == 0) { |
2703 |
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8 | switch (ctx->vo_type) { |
2704 | 4 | case SIMPLE_VO_TYPE: | |
2705 | case ADV_SIMPLE_VO_TYPE: | ||
2706 | 4 | h->c.low_delay = 1; | |
2707 | 4 | break; | |
2708 | 4 | default: | |
2709 | 4 | h->c.low_delay = 0; | |
2710 | } | ||
2711 | } | ||
2712 | } | ||
2713 | |||
2714 | 1196 | ctx->shape = get_bits(gb, 2); /* vol shape */ | |
2715 |
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1196 | if (ctx->shape != RECT_SHAPE) |
2716 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "only rectangular vol supported\n"); | |
2717 |
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1196 | if (ctx->shape == GRAY_SHAPE && vo_ver_id != 1) { |
2718 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "Gray shape not supported\n"); | |
2719 | ✗ | skip_bits(gb, 4); /* video_object_layer_shape_extension */ | |
2720 | } | ||
2721 | |||
2722 | 1196 | check_marker(h->c.avctx, gb, "before time_increment_resolution"); | |
2723 | |||
2724 | 1196 | h->c.avctx->framerate.num = get_bits(gb, 16); | |
2725 |
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1196 | if (!h->c.avctx->framerate.num) { |
2726 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "framerate==0\n"); | |
2727 | ✗ | return AVERROR_INVALIDDATA; | |
2728 | } | ||
2729 | |||
2730 | 1196 | ctx->time_increment_bits = av_log2(h->c.avctx->framerate.num - 1) + 1; | |
2731 |
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1196 | if (ctx->time_increment_bits < 1) |
2732 | ✗ | ctx->time_increment_bits = 1; | |
2733 | |||
2734 | 1196 | check_marker(h->c.avctx, gb, "before fixed_vop_rate"); | |
2735 | |||
2736 |
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✓ Branch 2 taken 1177 times.
|
1196 | if (get_bits1(gb) != 0) /* fixed_vop_rate */ |
2737 | 19 | h->c.avctx->framerate.den = get_bits(gb, ctx->time_increment_bits); | |
2738 | else | ||
2739 | 1177 | h->c.avctx->framerate.den = 1; | |
2740 | |||
2741 | 1196 | ctx->t_frame = 0; | |
2742 | |||
2743 |
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|
1196 | if (ctx->shape != BIN_ONLY_SHAPE) { |
2744 |
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|
1196 | if (ctx->shape == RECT_SHAPE) { |
2745 | 1196 | check_marker(h->c.avctx, gb, "before width"); | |
2746 | 1196 | width = get_bits(gb, 13); | |
2747 | 1196 | check_marker(h->c.avctx, gb, "before height"); | |
2748 | 1196 | height = get_bits(gb, 13); | |
2749 | 1196 | check_marker(h->c.avctx, gb, "after height"); | |
2750 |
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|
1196 | if (width && height && /* they should be non zero but who knows */ |
2751 |
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|
1196 | !(h->c.width && h->c.codec_tag == AV_RL32("MP4S"))) { |
2752 |
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1196 | if (h->c.width && h->c.height && |
2753 |
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|
855 | (h->c.width != width || h->c.height != height)) |
2754 | 20 | h->c.context_reinit = 1; | |
2755 | 1196 | h->c.width = width; | |
2756 | 1196 | h->c.height = height; | |
2757 | } | ||
2758 | } | ||
2759 | |||
2760 | 1196 | h->c.progressive_sequence = | |
2761 | 1196 | h->c.progressive_frame = get_bits1(gb) ^ 1; | |
2762 | 1196 | h->c.interlaced_dct = 0; | |
2763 |
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1196 | if (!get_bits1(gb) && (h->c.avctx->debug & FF_DEBUG_PICT_INFO)) |
2764 | ✗ | av_log(h->c.avctx, AV_LOG_INFO, /* OBMC Disable */ | |
2765 | "MPEG-4 OBMC not supported (very likely buggy encoder)\n"); | ||
2766 |
2/2✓ Branch 0 taken 718 times.
✓ Branch 1 taken 478 times.
|
1196 | if (vo_ver_id == 1) |
2767 | 718 | ctx->vol_sprite_usage = get_bits1(gb); /* vol_sprite_usage */ | |
2768 | else | ||
2769 | 478 | ctx->vol_sprite_usage = get_bits(gb, 2); /* vol_sprite_usage */ | |
2770 | |||
2771 |
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|
1196 | if (ctx->vol_sprite_usage == STATIC_SPRITE) |
2772 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "Static Sprites not supported\n"); | |
2773 |
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|
1196 | if (ctx->vol_sprite_usage == STATIC_SPRITE || |
2774 |
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|
1196 | ctx->vol_sprite_usage == GMC_SPRITE) { |
2775 | ✗ | if (ctx->vol_sprite_usage == STATIC_SPRITE) { | |
2776 | ✗ | skip_bits(gb, 13); // sprite_width | |
2777 | ✗ | check_marker(h->c.avctx, gb, "after sprite_width"); | |
2778 | ✗ | skip_bits(gb, 13); // sprite_height | |
2779 | ✗ | check_marker(h->c.avctx, gb, "after sprite_height"); | |
2780 | ✗ | skip_bits(gb, 13); // sprite_left | |
2781 | ✗ | check_marker(h->c.avctx, gb, "after sprite_left"); | |
2782 | ✗ | skip_bits(gb, 13); // sprite_top | |
2783 | ✗ | check_marker(h->c.avctx, gb, "after sprite_top"); | |
2784 | } | ||
2785 | ✗ | ctx->num_sprite_warping_points = get_bits(gb, 6); | |
2786 | ✗ | if (ctx->num_sprite_warping_points > 3) { | |
2787 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
2788 | "%d sprite_warping_points\n", | ||
2789 | ctx->num_sprite_warping_points); | ||
2790 | ✗ | ctx->num_sprite_warping_points = 0; | |
2791 | ✗ | return AVERROR_INVALIDDATA; | |
2792 | } | ||
2793 | ✗ | ctx->sprite_warping_accuracy = get_bits(gb, 2); | |
2794 | ✗ | ctx->sprite_brightness_change = get_bits1(gb); | |
2795 | ✗ | if (ctx->vol_sprite_usage == STATIC_SPRITE) | |
2796 | ✗ | skip_bits1(gb); // low_latency_sprite | |
2797 | } | ||
2798 | // FIXME sadct disable bit if verid!=1 && shape not rect | ||
2799 | |||
2800 |
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✓ Branch 2 taken 1196 times.
|
1196 | if (get_bits1(gb) == 1) { /* not_8_bit */ |
2801 | ✗ | ctx->quant_precision = get_bits(gb, 4); /* quant_precision */ | |
2802 | ✗ | if (get_bits(gb, 4) != 8) /* bits_per_pixel */ | |
2803 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "N-bit not supported\n"); | |
2804 | ✗ | if (ctx->quant_precision != 5) | |
2805 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
2806 | "quant precision %d\n", ctx->quant_precision); | ||
2807 | ✗ | if (ctx->quant_precision < 3 || ctx->quant_precision > 9) | |
2808 | ✗ | ctx->quant_precision = 5; | |
2809 | } else { | ||
2810 | 1196 | ctx->quant_precision = 5; | |
2811 | } | ||
2812 | |||
2813 | // FIXME a bunch of grayscale shape things | ||
2814 | |||
2815 |
2/2✓ Branch 1 taken 108 times.
✓ Branch 2 taken 1088 times.
|
1196 | if ((ctx->mpeg_quant = get_bits1(gb))) { /* vol_quant_type */ |
2816 | int i, v; | ||
2817 | |||
2818 | 108 | mpeg4_load_default_matrices(&h->c); | |
2819 | |||
2820 | /* load custom intra matrix */ | ||
2821 |
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✓ Branch 2 taken 100 times.
|
108 | if (get_bits1(gb)) { |
2822 | 8 | int last = 0; | |
2823 |
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|
240 | for (i = 0; i < 64; i++) { |
2824 | int j; | ||
2825 |
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✓ Branch 2 taken 240 times.
|
240 | if (get_bits_left(gb) < 8) { |
2826 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "insufficient data for custom matrix\n"); | |
2827 | ✗ | return AVERROR_INVALIDDATA; | |
2828 | } | ||
2829 | 240 | v = get_bits(gb, 8); | |
2830 |
2/2✓ Branch 0 taken 8 times.
✓ Branch 1 taken 232 times.
|
240 | if (v == 0) |
2831 | 8 | break; | |
2832 | |||
2833 | 232 | last = v; | |
2834 | 232 | j = h->c.idsp.idct_permutation[ff_zigzag_direct[i]]; | |
2835 | 232 | h->c.intra_matrix[j] = last; | |
2836 | } | ||
2837 | |||
2838 | /* replicate last value */ | ||
2839 |
2/2✓ Branch 0 taken 280 times.
✓ Branch 1 taken 8 times.
|
288 | for (; i < 64; i++) { |
2840 | 280 | int j = h->c.idsp.idct_permutation[ff_zigzag_direct[i]]; | |
2841 | 280 | h->c.intra_matrix[j] = last; | |
2842 | } | ||
2843 | } | ||
2844 | |||
2845 | /* load custom non intra matrix */ | ||
2846 |
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✓ Branch 2 taken 100 times.
|
108 | if (get_bits1(gb)) { |
2847 | 8 | int last = 0; | |
2848 |
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|
240 | for (i = 0; i < 64; i++) { |
2849 | int j; | ||
2850 |
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✓ Branch 2 taken 240 times.
|
240 | if (get_bits_left(gb) < 8) { |
2851 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "insufficient data for custom matrix\n"); | |
2852 | ✗ | return AVERROR_INVALIDDATA; | |
2853 | } | ||
2854 | 240 | v = get_bits(gb, 8); | |
2855 |
2/2✓ Branch 0 taken 8 times.
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|
240 | if (v == 0) |
2856 | 8 | break; | |
2857 | |||
2858 | 232 | last = v; | |
2859 | 232 | j = h->c.idsp.idct_permutation[ff_zigzag_direct[i]]; | |
2860 | 232 | h->c.inter_matrix[j] = v; | |
2861 | } | ||
2862 | |||
2863 | /* replicate last value */ | ||
2864 |
2/2✓ Branch 0 taken 280 times.
✓ Branch 1 taken 8 times.
|
288 | for (; i < 64; i++) { |
2865 | 280 | int j = h->c.idsp.idct_permutation[ff_zigzag_direct[i]]; | |
2866 | 280 | h->c.inter_matrix[j] = last; | |
2867 | } | ||
2868 | } | ||
2869 | |||
2870 | // FIXME a bunch of grayscale shape things | ||
2871 | } | ||
2872 | |||
2873 |
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✓ Branch 1 taken 718 times.
|
1196 | if (vo_ver_id != 1) |
2874 | 478 | h->c.quarter_sample = get_bits1(gb); | |
2875 | else | ||
2876 | 718 | h->c.quarter_sample = 0; | |
2877 | |||
2878 |
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✓ Branch 2 taken 1196 times.
|
1196 | if (get_bits_left(gb) < 4) { |
2879 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "VOL Header truncated\n"); | |
2880 | ✗ | return AVERROR_INVALIDDATA; | |
2881 | } | ||
2882 | |||
2883 |
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|
1196 | if (!get_bits1(gb)) { |
2884 | ✗ | int pos = get_bits_count(gb); | |
2885 | ✗ | int estimation_method = get_bits(gb, 2); | |
2886 | ✗ | if (estimation_method < 2) { | |
2887 | ✗ | if (!get_bits1(gb)) { | |
2888 | ✗ | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* opaque */ | |
2889 | ✗ | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* transparent */ | |
2890 | ✗ | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* intra_cae */ | |
2891 | ✗ | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* inter_cae */ | |
2892 | ✗ | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* no_update */ | |
2893 | ✗ | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* upsampling */ | |
2894 | } | ||
2895 | ✗ | if (!get_bits1(gb)) { | |
2896 | ✗ | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* intra_blocks */ | |
2897 | ✗ | ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* inter_blocks */ | |
2898 | ✗ | ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* inter4v_blocks */ | |
2899 | ✗ | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* not coded blocks */ | |
2900 | } | ||
2901 | ✗ | if (!check_marker(h->c.avctx, gb, "in complexity estimation part 1")) { | |
2902 | ✗ | skip_bits_long(gb, pos - get_bits_count(gb)); | |
2903 | ✗ | goto no_cplx_est; | |
2904 | } | ||
2905 | ✗ | if (!get_bits1(gb)) { | |
2906 | ✗ | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* dct_coeffs */ | |
2907 | ✗ | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* dct_lines */ | |
2908 | ✗ | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* vlc_syms */ | |
2909 | ✗ | ctx->cplx_estimation_trash_i += 4 * get_bits1(gb); /* vlc_bits */ | |
2910 | } | ||
2911 | ✗ | if (!get_bits1(gb)) { | |
2912 | ✗ | ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* apm */ | |
2913 | ✗ | ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* npm */ | |
2914 | ✗ | ctx->cplx_estimation_trash_b += 8 * get_bits1(gb); /* interpolate_mc_q */ | |
2915 | ✗ | ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* forwback_mc_q */ | |
2916 | ✗ | ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* halfpel2 */ | |
2917 | ✗ | ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* halfpel4 */ | |
2918 | } | ||
2919 | ✗ | if (!check_marker(h->c.avctx, gb, "in complexity estimation part 2")) { | |
2920 | ✗ | skip_bits_long(gb, pos - get_bits_count(gb)); | |
2921 | ✗ | goto no_cplx_est; | |
2922 | } | ||
2923 | ✗ | if (estimation_method == 1) { | |
2924 | ✗ | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* sadct */ | |
2925 | ✗ | ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* qpel */ | |
2926 | } | ||
2927 | } else | ||
2928 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
2929 | "Invalid Complexity estimation method %d\n", | ||
2930 | estimation_method); | ||
2931 | } else { | ||
2932 | |||
2933 | 1196 | no_cplx_est: | |
2934 | 1196 | ctx->cplx_estimation_trash_i = | |
2935 | 1196 | ctx->cplx_estimation_trash_p = | |
2936 | 1196 | ctx->cplx_estimation_trash_b = 0; | |
2937 | } | ||
2938 | |||
2939 | 1196 | ctx->resync_marker = !get_bits1(gb); /* resync_marker_disabled */ | |
2940 | |||
2941 | 1196 | h->data_partitioning = get_bits1(gb); | |
2942 |
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|
1196 | if (h->data_partitioning) |
2943 | 273 | ctx->rvlc = get_bits1(gb); | |
2944 | |||
2945 |
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|
1196 | if (vo_ver_id != 1) { |
2946 | 478 | ctx->new_pred = get_bits1(gb); | |
2947 |
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✓ Branch 1 taken 478 times.
|
478 | if (ctx->new_pred) { |
2948 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "new pred not supported\n"); | |
2949 | ✗ | skip_bits(gb, 2); /* requested upstream message type */ | |
2950 | ✗ | skip_bits1(gb); /* newpred segment type */ | |
2951 | } | ||
2952 |
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✓ Branch 2 taken 478 times.
|
478 | if (get_bits1(gb)) // reduced_res_vop |
2953 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
2954 | "reduced resolution VOP not supported\n"); | ||
2955 | } else { | ||
2956 | 718 | ctx->new_pred = 0; | |
2957 | } | ||
2958 | |||
2959 | 1196 | ctx->scalability = get_bits1(gb); | |
2960 | |||
2961 |
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✓ Branch 1 taken 1196 times.
|
1196 | if (ctx->scalability) { |
2962 | ✗ | GetBitContext bak = *gb; | |
2963 | int h_sampling_factor_n; | ||
2964 | int h_sampling_factor_m; | ||
2965 | int v_sampling_factor_n; | ||
2966 | int v_sampling_factor_m; | ||
2967 | |||
2968 | ✗ | skip_bits1(gb); // hierarchy_type | |
2969 | ✗ | skip_bits(gb, 4); /* ref_layer_id */ | |
2970 | ✗ | skip_bits1(gb); /* ref_layer_sampling_dir */ | |
2971 | ✗ | h_sampling_factor_n = get_bits(gb, 5); | |
2972 | ✗ | h_sampling_factor_m = get_bits(gb, 5); | |
2973 | ✗ | v_sampling_factor_n = get_bits(gb, 5); | |
2974 | ✗ | v_sampling_factor_m = get_bits(gb, 5); | |
2975 | ✗ | ctx->enhancement_type = get_bits1(gb); | |
2976 | |||
2977 | ✗ | if (h_sampling_factor_n == 0 || h_sampling_factor_m == 0 || | |
2978 | ✗ | v_sampling_factor_n == 0 || v_sampling_factor_m == 0) { | |
2979 | /* illegal scalability header (VERY broken encoder), | ||
2980 | * trying to workaround */ | ||
2981 | ✗ | ctx->scalability = 0; | |
2982 | ✗ | *gb = bak; | |
2983 | } else | ||
2984 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "scalability not supported\n"); | |
2985 | |||
2986 | // bin shape stuff FIXME | ||
2987 | } | ||
2988 | } | ||
2989 | |||
2990 |
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✓ Branch 1 taken 1196 times.
|
1196 | if (h->c.avctx->debug&FF_DEBUG_PICT_INFO) { |
2991 | ✗ | av_log(h->c.avctx, AV_LOG_DEBUG, "tb %d/%d, tincrbits:%d, qp_prec:%d, ps:%d, low_delay:%d %s%s%s%s\n", | |
2992 | ✗ | h->c.avctx->framerate.den, h->c.avctx->framerate.num, | |
2993 | ctx->time_increment_bits, | ||
2994 | ctx->quant_precision, | ||
2995 | h->c.progressive_sequence, | ||
2996 | h->c.low_delay, | ||
2997 | ✗ | ctx->scalability ? "scalability " :"" , | |
2998 | ✗ | h->c.quarter_sample ? "qpel " : "", | |
2999 | ✗ | h->data_partitioning ? "partition " : "", | |
3000 | ✗ | ctx->rvlc ? "rvlc " : "" | |
3001 | ); | ||
3002 | } | ||
3003 | |||
3004 | 1196 | return 0; | |
3005 | } | ||
3006 | |||
3007 | /** | ||
3008 | * Decode the user data stuff in the header. | ||
3009 | * Also initializes divx/xvid/lavc_version/build. | ||
3010 | */ | ||
3011 | 69 | static int decode_user_data(Mpeg4DecContext *ctx, GetBitContext *gb) | |
3012 | { | ||
3013 | 69 | H263DecContext *const h = &ctx->h; | |
3014 | char buf[256]; | ||
3015 | int i; | ||
3016 | int e; | ||
3017 | 69 | int ver = 0, build = 0, ver2 = 0, ver3 = 0; | |
3018 | char last; | ||
3019 | |||
3020 |
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|
686 | for (i = 0; i < 255 && get_bits_count(gb) < gb->size_in_bits; i++) { |
3021 |
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✓ Branch 2 taken 617 times.
|
671 | if (show_bits(gb, 23) == 0) |
3022 | 54 | break; | |
3023 | 617 | buf[i] = get_bits(gb, 8); | |
3024 | } | ||
3025 | 69 | buf[i] = 0; | |
3026 | |||
3027 | /* divx detection */ | ||
3028 | 69 | e = sscanf(buf, "DivX%dBuild%d%c", &ver, &build, &last); | |
3029 |
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✗ Branch 1 not taken.
|
69 | if (e < 2) |
3030 | 69 | e = sscanf(buf, "DivX%db%d%c", &ver, &build, &last); | |
3031 |
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✓ Branch 1 taken 59 times.
|
69 | if (e >= 2) { |
3032 | 10 | ctx->divx_version = ver; | |
3033 | 10 | ctx->divx_build = build; | |
3034 |
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|
10 | h->divx_packed = e == 3 && last == 'p'; |
3035 | } | ||
3036 | |||
3037 | /* libavcodec detection */ | ||
3038 | 69 | e = sscanf(buf, "FFmpe%*[^b]b%d", &build) + 3; | |
3039 |
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✗ Branch 1 not taken.
|
69 | if (e != 4) |
3040 | 69 | e = sscanf(buf, "FFmpeg v%d.%d.%d / libavcodec build: %d", &ver, &ver2, &ver3, &build); | |
3041 |
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✗ Branch 1 not taken.
|
69 | if (e != 4) { |
3042 | 69 | e = sscanf(buf, "Lavc%d.%d.%d", &ver, &ver2, &ver3) + 1; | |
3043 |
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✓ Branch 1 taken 57 times.
|
69 | if (e > 1) { |
3044 |
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✓ Branch 5 taken 12 times.
|
12 | if (ver > 0xFFU || ver2 > 0xFFU || ver3 > 0xFFU) { |
3045 | ✗ | av_log(h->c.avctx, AV_LOG_WARNING, | |
3046 | "Unknown Lavc version string encountered, %d.%d.%d; " | ||
3047 | "clamping sub-version values to 8-bits.\n", | ||
3048 | ver, ver2, ver3); | ||
3049 | } | ||
3050 | 12 | build = ((ver & 0xFF) << 16) + ((ver2 & 0xFF) << 8) + (ver3 & 0xFF); | |
3051 | } | ||
3052 | } | ||
3053 |
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✓ Branch 1 taken 12 times.
|
69 | if (e != 4) { |
3054 |
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✓ Branch 1 taken 57 times.
|
57 | if (strcmp(buf, "ffmpeg") == 0) |
3055 | ✗ | ctx->lavc_build = 4600; | |
3056 | } | ||
3057 |
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✓ Branch 1 taken 57 times.
|
69 | if (e == 4) |
3058 | 12 | ctx->lavc_build = build; | |
3059 | |||
3060 | /* Xvid detection */ | ||
3061 | 69 | e = sscanf(buf, "XviD%d", &build); | |
3062 |
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|
69 | if (e == 1) |
3063 | 19 | ctx->xvid_build = build; | |
3064 | |||
3065 | 69 | return 0; | |
3066 | } | ||
3067 | |||
3068 | 8 | static av_cold void permute_quant_matrix(uint16_t matrix[64], | |
3069 | const uint8_t new_perm[64], | ||
3070 | const uint8_t old_perm[64]) | ||
3071 | { | ||
3072 | uint16_t tmp[64]; | ||
3073 | |||
3074 | 8 | memcpy(tmp, matrix, sizeof(tmp)); | |
3075 |
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|
520 | for (int i = 0; i < 64; ++i) |
3076 | 512 | matrix[new_perm[i]] = tmp[old_perm[i]]; | |
3077 | 8 | } | |
3078 | |||
3079 | 4 | static av_cold void switch_to_xvid_idct(AVCodecContext *const avctx, | |
3080 | MpegEncContext *const s) | ||
3081 | { | ||
3082 | uint8_t old_permutation[64]; | ||
3083 | |||
3084 | 4 | memcpy(old_permutation, s->idsp.idct_permutation, sizeof(old_permutation)); | |
3085 | |||
3086 | 4 | avctx->idct_algo = FF_IDCT_XVID; | |
3087 | 4 | ff_mpv_idct_init(s); | |
3088 | 4 | ff_permute_scantable(s->permutated_intra_h_scantable, | |
3089 | 4 | s->alternate_scan ? ff_alternate_vertical_scan : ff_alternate_horizontal_scan, | |
3090 |
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|
4 | s->idsp.idct_permutation); |
3091 | |||
3092 | // Normal (i.e. non-studio) MPEG-4 does not use the chroma matrices. | ||
3093 | 4 | permute_quant_matrix(s->inter_matrix, s->idsp.idct_permutation, old_permutation); | |
3094 | 4 | permute_quant_matrix(s->intra_matrix, s->idsp.idct_permutation, old_permutation); | |
3095 | 4 | } | |
3096 | |||
3097 | 3529 | void ff_mpeg4_workaround_bugs(AVCodecContext *avctx) | |
3098 | { | ||
3099 | 3529 | Mpeg4DecContext *ctx = avctx->priv_data; | |
3100 | 3529 | H263DecContext *const h = &ctx->h; | |
3101 | |||
3102 |
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|
3529 | if (ctx->xvid_build == -1 && ctx->divx_version == -1 && ctx->lavc_build == -1) { |
3103 |
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3371 | if (h->c.codec_tag == AV_RL32("XVID") || |
3104 |
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|
3371 | h->c.codec_tag == AV_RL32("XVIX") || |
3105 |
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|
3371 | h->c.codec_tag == AV_RL32("RMP4") || |
3106 |
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3371 | h->c.codec_tag == AV_RL32("ZMP4") || |
3107 |
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|
3371 | h->c.codec_tag == AV_RL32("SIPP")) |
3108 | ✗ | ctx->xvid_build = 0; | |
3109 | } | ||
3110 | |||
3111 |
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|
3529 | if (ctx->xvid_build == -1 && ctx->divx_version == -1 && ctx->lavc_build == -1) |
3112 |
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3371 | if (h->c.codec_tag == AV_RL32("DIVX") && ctx->vo_type == 0 && |
3113 | ✗ | ctx->vol_control_parameters == 0) | |
3114 | ✗ | ctx->divx_version = 400; // divx 4 | |
3115 | |||
3116 |
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|
3529 | if (ctx->xvid_build >= 0 && ctx->divx_version >= 0) { |
3117 | 3 | ctx->divx_version = | |
3118 | 3 | ctx->divx_build = -1; | |
3119 | } | ||
3120 | |||
3121 |
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3529 | if (h->c.workaround_bugs & FF_BUG_AUTODETECT) { |
3122 |
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|
3529 | if (h->c.codec_tag == AV_RL32("XVIX")) |
3123 | ✗ | h->c.workaround_bugs |= FF_BUG_XVID_ILACE; | |
3124 | |||
3125 |
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|
3529 | if (h->c.codec_tag == AV_RL32("UMP4")) |
3126 | ✗ | h->c.workaround_bugs |= FF_BUG_UMP4; | |
3127 | |||
3128 |
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3529 | if (ctx->divx_version >= 500 && ctx->divx_build < 1814) |
3129 | ✗ | h->c.workaround_bugs |= FF_BUG_QPEL_CHROMA; | |
3130 | |||
3131 |
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3529 | if (ctx->divx_version > 502 && ctx->divx_build < 1814) |
3132 | ✗ | h->c.workaround_bugs |= FF_BUG_QPEL_CHROMA2; | |
3133 | |||
3134 |
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|
3529 | if (ctx->xvid_build <= 3U) |
3135 | ✗ | h->padding_bug_score = 256 * 256 * 256 * 64; | |
3136 | |||
3137 |
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3529 | if (ctx->xvid_build <= 1U) |
3138 | ✗ | h->c.workaround_bugs |= FF_BUG_QPEL_CHROMA; | |
3139 | |||
3140 |
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|
3529 | if (ctx->xvid_build <= 12U) |
3141 | ✗ | h->c.workaround_bugs |= FF_BUG_EDGE; | |
3142 | |||
3143 |
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|
3529 | if (ctx->xvid_build <= 32U) |
3144 | ✗ | h->c.workaround_bugs |= FF_BUG_DC_CLIP; | |
3145 | |||
3146 | #define SET_QPEL_FUNC(postfix1, postfix2) \ | ||
3147 | h->c.qdsp.put_ ## postfix1 = ff_put_ ## postfix2; \ | ||
3148 | h->c.qdsp.put_no_rnd_ ## postfix1 = ff_put_no_rnd_ ## postfix2; \ | ||
3149 | h->c.qdsp.avg_ ## postfix1 = ff_avg_ ## postfix2; | ||
3150 | |||
3151 |
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|
3529 | if (ctx->lavc_build < 4653U) |
3152 | ✗ | h->c.workaround_bugs |= FF_BUG_STD_QPEL; | |
3153 | |||
3154 |
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|
3529 | if (ctx->lavc_build < 4655U) |
3155 | ✗ | h->c.workaround_bugs |= FF_BUG_DIRECT_BLOCKSIZE; | |
3156 | |||
3157 |
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3529 | if (ctx->lavc_build < 4670U) |
3158 | ✗ | h->c.workaround_bugs |= FF_BUG_EDGE; | |
3159 | |||
3160 |
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3529 | if (ctx->lavc_build <= 4712U) |
3161 | ✗ | h->c.workaround_bugs |= FF_BUG_DC_CLIP; | |
3162 | |||
3163 |
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3529 | if ((ctx->lavc_build&0xFF) >= 100) { |
3164 |
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|
3529 | if (ctx->lavc_build > 3621476 && ctx->lavc_build < 3752552 && |
3165 | ✗ | (ctx->lavc_build < 3752037 || ctx->lavc_build > 3752191) // 3.2.1+ | |
3166 | ) | ||
3167 | ✗ | h->c.workaround_bugs |= FF_BUG_IEDGE; | |
3168 | } | ||
3169 | |||
3170 |
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3529 | if (ctx->divx_version >= 0) |
3171 | ✗ | h->c.workaround_bugs |= FF_BUG_DIRECT_BLOCKSIZE; | |
3172 |
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3529 | if (ctx->divx_version == 501 && ctx->divx_build == 20020416) |
3173 | ✗ | h->padding_bug_score = 256 * 256 * 256 * 64; | |
3174 | |||
3175 |
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3529 | if (ctx->divx_version < 500U) |
3176 | ✗ | h->c.workaround_bugs |= FF_BUG_EDGE; | |
3177 | |||
3178 |
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3529 | if (ctx->divx_version >= 0) |
3179 | ✗ | h->c.workaround_bugs |= FF_BUG_HPEL_CHROMA; | |
3180 | } | ||
3181 | |||
3182 |
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3529 | if (h->c.workaround_bugs & FF_BUG_STD_QPEL) { |
3183 | ✗ | SET_QPEL_FUNC(qpel_pixels_tab[0][5], qpel16_mc11_old_c) | |
3184 | ✗ | SET_QPEL_FUNC(qpel_pixels_tab[0][7], qpel16_mc31_old_c) | |
3185 | ✗ | SET_QPEL_FUNC(qpel_pixels_tab[0][9], qpel16_mc12_old_c) | |
3186 | ✗ | SET_QPEL_FUNC(qpel_pixels_tab[0][11], qpel16_mc32_old_c) | |
3187 | ✗ | SET_QPEL_FUNC(qpel_pixels_tab[0][13], qpel16_mc13_old_c) | |
3188 | ✗ | SET_QPEL_FUNC(qpel_pixels_tab[0][15], qpel16_mc33_old_c) | |
3189 | |||
3190 | ✗ | SET_QPEL_FUNC(qpel_pixels_tab[1][5], qpel8_mc11_old_c) | |
3191 | ✗ | SET_QPEL_FUNC(qpel_pixels_tab[1][7], qpel8_mc31_old_c) | |
3192 | ✗ | SET_QPEL_FUNC(qpel_pixels_tab[1][9], qpel8_mc12_old_c) | |
3193 | ✗ | SET_QPEL_FUNC(qpel_pixels_tab[1][11], qpel8_mc32_old_c) | |
3194 | ✗ | SET_QPEL_FUNC(qpel_pixels_tab[1][13], qpel8_mc13_old_c) | |
3195 | ✗ | SET_QPEL_FUNC(qpel_pixels_tab[1][15], qpel8_mc33_old_c) | |
3196 | } | ||
3197 | |||
3198 |
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3529 | if (avctx->debug & FF_DEBUG_BUGS) |
3199 | ✗ | av_log(h->c.avctx, AV_LOG_DEBUG, | |
3200 | "bugs: %X lavc_build:%d xvid_build:%d divx_version:%d divx_build:%d %s\n", | ||
3201 | h->c.workaround_bugs, ctx->lavc_build, ctx->xvid_build, | ||
3202 | ✗ | ctx->divx_version, ctx->divx_build, h->divx_packed ? "p" : ""); | |
3203 | |||
3204 |
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3529 | if (CONFIG_MPEG4_DECODER && ctx->xvid_build >= 0 && |
3205 |
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60 | avctx->idct_algo == FF_IDCT_AUTO && !h->c.studio_profile) { |
3206 | 4 | switch_to_xvid_idct(avctx, &h->c); | |
3207 | } | ||
3208 | 3529 | } | |
3209 | |||
3210 | 7048 | static int decode_vop_header(Mpeg4DecContext *ctx, GetBitContext *gb, | |
3211 | int parse_only) | ||
3212 | { | ||
3213 | 7048 | H263DecContext *const h = &ctx->h; | |
3214 | int time_incr, time_increment; | ||
3215 | int64_t pts; | ||
3216 | |||
3217 | 7048 | h->c.mcsel = 0; | |
3218 | 7048 | h->c.pict_type = get_bits(gb, 2) + AV_PICTURE_TYPE_I; /* pict type: I = 0 , P = 1 */ | |
3219 |
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7048 | if (h->c.pict_type == AV_PICTURE_TYPE_B && h->c.low_delay && |
3220 | ✗ | ctx->vol_control_parameters == 0 && !(h->c.avctx->flags & AV_CODEC_FLAG_LOW_DELAY)) { | |
3221 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "low_delay flag set incorrectly, clearing it\n"); | |
3222 | ✗ | h->c.low_delay = 0; | |
3223 | } | ||
3224 | |||
3225 |
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|
7048 | h->partitioned_frame = h->data_partitioning && h->c.pict_type != AV_PICTURE_TYPE_B; |
3226 |
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7048 | if (h->partitioned_frame) |
3227 | 1028 | h->decode_mb = mpeg4_decode_partitioned_mb; | |
3228 | else | ||
3229 | 6020 | h->decode_mb = mpeg4_decode_mb; | |
3230 | |||
3231 | 7048 | time_incr = 0; | |
3232 |
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|
7291 | while (get_bits1(gb) != 0) |
3233 | 243 | time_incr++; | |
3234 | |||
3235 | 7048 | check_marker(h->c.avctx, gb, "before time_increment"); | |
3236 | |||
3237 |
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7048 | if (ctx->time_increment_bits == 0 || |
3238 |
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|
7046 | !(show_bits(gb, ctx->time_increment_bits + 1) & 1)) { |
3239 | 10 | av_log(h->c.avctx, AV_LOG_WARNING, | |
3240 | "time_increment_bits %d is invalid in relation to the current bitstream, this is likely caused by a missing VOL header\n", ctx->time_increment_bits); | ||
3241 | |||
3242 | 10 | for (ctx->time_increment_bits = 1; | |
3243 |
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110 | ctx->time_increment_bits < 16; |
3244 | 100 | ctx->time_increment_bits++) { | |
3245 |
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110 | if (h->c.pict_type == AV_PICTURE_TYPE_P || |
3246 |
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110 | (h->c.pict_type == AV_PICTURE_TYPE_S && |
3247 | ✗ | ctx->vol_sprite_usage == GMC_SPRITE)) { | |
3248 | ✗ | if ((show_bits(gb, ctx->time_increment_bits + 6) & 0x37) == 0x30) | |
3249 | ✗ | break; | |
3250 |
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|
110 | } else if ((show_bits(gb, ctx->time_increment_bits + 5) & 0x1F) == 0x18) |
3251 | 10 | break; | |
3252 | } | ||
3253 | |||
3254 | 10 | av_log(h->c.avctx, AV_LOG_WARNING, | |
3255 | "time_increment_bits set to %d bits, based on bitstream analysis\n", ctx->time_increment_bits); | ||
3256 | } | ||
3257 | |||
3258 | if (IS_3IV1) | ||
3259 | time_increment = get_bits1(gb); // FIXME investigate further | ||
3260 | else | ||
3261 | 7048 | time_increment = get_bits(gb, ctx->time_increment_bits); | |
3262 | |||
3263 |
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7048 | if (h->c.pict_type != AV_PICTURE_TYPE_B) { |
3264 | 5747 | h->c.last_time_base = h->c.time_base; | |
3265 | 5747 | h->c.time_base += time_incr; | |
3266 | 5747 | h->c.time = h->c.time_base * (int64_t)h->c.avctx->framerate.num + time_increment; | |
3267 |
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5747 | if (h->c.workaround_bugs & FF_BUG_UMP4) { |
3268 | ✗ | if (h->c.time < h->c.last_non_b_time) { | |
3269 | /* header is not mpeg-4-compatible, broken encoder, | ||
3270 | * trying to workaround */ | ||
3271 | ✗ | h->c.time_base++; | |
3272 | ✗ | h->c.time += h->c.avctx->framerate.num; | |
3273 | } | ||
3274 | } | ||
3275 | 5747 | h->c.pp_time = h->c.time - h->c.last_non_b_time; | |
3276 | 5747 | h->c.last_non_b_time = h->c.time; | |
3277 | } else { | ||
3278 | 1301 | h->c.time = (h->c.last_time_base + time_incr) * (int64_t)h->c.avctx->framerate.num + time_increment; | |
3279 | 1301 | h->c.pb_time = h->c.pp_time - (h->c.last_non_b_time - h->c.time); | |
3280 |
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1301 | if (h->c.pp_time <= h->c.pb_time || |
3281 |
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1301 | h->c.pp_time <= h->c.pp_time - h->c.pb_time || |
3282 |
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1301 | h->c.pp_time <= 0) { |
3283 | /* messed up order, maybe after seeking? skipping current B-frame */ | ||
3284 | ✗ | return FRAME_SKIPPED; | |
3285 | } | ||
3286 | 1301 | ff_mpeg4_init_direct_mv(&h->c); | |
3287 | |||
3288 |
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1301 | if (ctx->t_frame == 0) |
3289 | 210 | ctx->t_frame = h->c.pb_time; | |
3290 |
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1301 | if (ctx->t_frame == 0) |
3291 | ✗ | ctx->t_frame = 1; // 1/0 protection | |
3292 |
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1301 | h->c.pp_field_time = (ROUNDED_DIV(h->c.last_non_b_time, ctx->t_frame) - |
3293 |
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1301 | ROUNDED_DIV(h->c.last_non_b_time - h->c.pp_time, ctx->t_frame)) * 2; |
3294 |
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1301 | h->c.pb_field_time = (ROUNDED_DIV(h->c.time, ctx->t_frame) - |
3295 |
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|
1301 | ROUNDED_DIV(h->c.last_non_b_time - h->c.pp_time, ctx->t_frame)) * 2; |
3296 |
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1301 | if (h->c.pp_field_time <= h->c.pb_field_time || h->c.pb_field_time <= 1) { |
3297 | 2 | h->c.pb_field_time = 2; | |
3298 | 2 | h->c.pp_field_time = 4; | |
3299 |
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|
2 | if (!h->c.progressive_sequence) |
3300 | ✗ | return FRAME_SKIPPED; | |
3301 | } | ||
3302 | } | ||
3303 | |||
3304 |
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7048 | if (h->c.avctx->framerate.den) |
3305 |
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|
7048 | pts = ROUNDED_DIV(h->c.time, h->c.avctx->framerate.den); |
3306 | else | ||
3307 | ✗ | pts = AV_NOPTS_VALUE; | |
3308 | ff_dlog(h->c.avctx, "MPEG4 PTS: %"PRId64"\n", pts); | ||
3309 | |||
3310 | 7048 | check_marker(h->c.avctx, gb, "before vop_coded"); | |
3311 | |||
3312 | /* vop coded */ | ||
3313 |
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|
7048 | if (get_bits1(gb) != 1) { |
3314 |
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|
8 | if (h->c.avctx->debug & FF_DEBUG_PICT_INFO) |
3315 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "vop not coded\n"); | |
3316 | 8 | h->skipped_last_frame = 1; | |
3317 | 8 | return FRAME_SKIPPED; | |
3318 | } | ||
3319 |
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|
7040 | if (ctx->new_pred) |
3320 | ✗ | decode_new_pred(ctx, gb); | |
3321 | |||
3322 |
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|
7040 | if (ctx->shape != BIN_ONLY_SHAPE && |
3323 |
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|
7040 | (h->c.pict_type == AV_PICTURE_TYPE_P || |
3324 |
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|
2327 | (h->c.pict_type == AV_PICTURE_TYPE_S && |
3325 | ✗ | ctx->vol_sprite_usage == GMC_SPRITE))) { | |
3326 | /* rounding type for motion estimation */ | ||
3327 | 4713 | h->c.no_rounding = get_bits1(gb); | |
3328 | } else { | ||
3329 | 2327 | h->c.no_rounding = 0; | |
3330 | } | ||
3331 | // FIXME reduced res stuff | ||
3332 | |||
3333 |
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|
7040 | if (ctx->shape != RECT_SHAPE) { |
3334 | ✗ | if (ctx->vol_sprite_usage != 1 || h->c.pict_type != AV_PICTURE_TYPE_I) { | |
3335 | ✗ | skip_bits(gb, 13); /* width */ | |
3336 | ✗ | check_marker(h->c.avctx, gb, "after width"); | |
3337 | ✗ | skip_bits(gb, 13); /* height */ | |
3338 | ✗ | check_marker(h->c.avctx, gb, "after height"); | |
3339 | ✗ | skip_bits(gb, 13); /* hor_spat_ref */ | |
3340 | ✗ | check_marker(h->c.avctx, gb, "after hor_spat_ref"); | |
3341 | ✗ | skip_bits(gb, 13); /* ver_spat_ref */ | |
3342 | } | ||
3343 | ✗ | skip_bits1(gb); /* change_CR_disable */ | |
3344 | |||
3345 | ✗ | if (get_bits1(gb) != 0) | |
3346 | ✗ | skip_bits(gb, 8); /* constant_alpha_value */ | |
3347 | } | ||
3348 | |||
3349 | // FIXME complexity estimation stuff | ||
3350 | |||
3351 |
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✗ Branch 1 not taken.
|
7040 | if (ctx->shape != BIN_ONLY_SHAPE) { |
3352 | 7040 | skip_bits_long(gb, ctx->cplx_estimation_trash_i); | |
3353 |
2/2✓ Branch 0 taken 6014 times.
✓ Branch 1 taken 1026 times.
|
7040 | if (h->c.pict_type != AV_PICTURE_TYPE_I) |
3354 | 6014 | skip_bits_long(gb, ctx->cplx_estimation_trash_p); | |
3355 |
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|
7040 | if (h->c.pict_type == AV_PICTURE_TYPE_B) |
3356 | 1301 | skip_bits_long(gb, ctx->cplx_estimation_trash_b); | |
3357 | |||
3358 |
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✓ Branch 2 taken 7040 times.
|
7040 | if (get_bits_left(gb) < 3) { |
3359 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "Header truncated\n"); | |
3360 | ✗ | return AVERROR_INVALIDDATA; | |
3361 | } | ||
3362 | 7040 | ctx->intra_dc_threshold = ff_mpeg4_dc_threshold[get_bits(gb, 3)]; | |
3363 |
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|
7040 | if (!h->c.progressive_sequence) { |
3364 | 50 | h->c.top_field_first = get_bits1(gb); | |
3365 | 50 | h->c.alternate_scan = get_bits1(gb); | |
3366 | } else | ||
3367 | 6990 | h->c.alternate_scan = 0; | |
3368 | } | ||
3369 | /* Skip at this point when only parsing since the remaining | ||
3370 | * data is not useful for a parser and requires the | ||
3371 | * sprite_trajectory VLC to be initialized. */ | ||
3372 |
2/2✓ Branch 0 taken 3512 times.
✓ Branch 1 taken 3528 times.
|
7040 | if (parse_only) |
3373 | 3512 | goto end; | |
3374 | |||
3375 |
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✓ Branch 1 taken 3528 times.
|
3528 | if (h->c.alternate_scan) { |
3376 | ✗ | ff_init_scantable(h->c.idsp.idct_permutation, &h->c.intra_scantable, ff_alternate_vertical_scan); | |
3377 | ✗ | ff_permute_scantable(h->c.permutated_intra_h_scantable, ff_alternate_vertical_scan, | |
3378 | ✗ | h->c.idsp.idct_permutation); | |
3379 | } else { | ||
3380 | 3528 | ff_init_scantable(h->c.idsp.idct_permutation, &h->c.intra_scantable, ff_zigzag_direct); | |
3381 | 3528 | ff_permute_scantable(h->c.permutated_intra_h_scantable, ff_alternate_horizontal_scan, | |
3382 | 3528 | h->c.idsp.idct_permutation); | |
3383 | } | ||
3384 | 3528 | ff_permute_scantable(h->c.permutated_intra_v_scantable, ff_alternate_vertical_scan, | |
3385 | 3528 | h->c.idsp.idct_permutation); | |
3386 | |||
3387 |
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|
3528 | if (h->c.pict_type == AV_PICTURE_TYPE_S) { |
3388 | ✗ | if((ctx->vol_sprite_usage == STATIC_SPRITE || | |
3389 | ✗ | ctx->vol_sprite_usage == GMC_SPRITE)) { | |
3390 | ✗ | if (mpeg4_decode_sprite_trajectory(ctx, gb) < 0) | |
3391 | ✗ | return AVERROR_INVALIDDATA; | |
3392 | ✗ | if (ctx->sprite_brightness_change) | |
3393 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
3394 | "sprite_brightness_change not supported\n"); | ||
3395 | ✗ | if (ctx->vol_sprite_usage == STATIC_SPRITE) | |
3396 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, "static sprite not supported\n"); | |
3397 | } else { | ||
3398 | ✗ | memset(ctx->sprite_offset, 0, sizeof(ctx->sprite_offset)); | |
3399 | ✗ | memset(ctx->sprite_delta, 0, sizeof(ctx->sprite_delta)); | |
3400 | } | ||
3401 | } | ||
3402 | |||
3403 | 3528 | ctx->f_code = 1; | |
3404 | 3528 | ctx->b_code = 1; | |
3405 |
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|
3528 | if (ctx->shape != BIN_ONLY_SHAPE) { |
3406 | 3528 | h->c.chroma_qscale = h->c.qscale = get_bits(gb, ctx->quant_precision); | |
3407 |
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✓ Branch 1 taken 3528 times.
|
3528 | if (h->c.qscale == 0) { |
3408 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
3409 | "Error, header damaged or not MPEG-4 header (qscale=0)\n"); | ||
3410 | ✗ | return AVERROR_INVALIDDATA; // makes no sense to continue, as there is nothing left from the image then | |
3411 | } | ||
3412 | |||
3413 |
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✓ Branch 1 taken 456 times.
|
3528 | if (h->c.pict_type != AV_PICTURE_TYPE_I) { |
3414 | 3072 | ctx->f_code = get_bits(gb, 3); /* fcode_for */ | |
3415 |
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✓ Branch 1 taken 3072 times.
|
3072 | if (ctx->f_code == 0) { |
3416 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
3417 | "Error, header damaged or not MPEG-4 header (f_code=0)\n"); | ||
3418 | ✗ | ctx->f_code = 1; | |
3419 | ✗ | return AVERROR_INVALIDDATA; // makes no sense to continue, as there is nothing left from the image then | |
3420 | } | ||
3421 | } | ||
3422 | |||
3423 |
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✓ Branch 1 taken 2886 times.
|
3528 | if (h->c.pict_type == AV_PICTURE_TYPE_B) { |
3424 | 642 | ctx->b_code = get_bits(gb, 3); | |
3425 |
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|
642 | if (ctx->b_code == 0) { |
3426 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
3427 | "Error, header damaged or not MPEG4 header (b_code=0)\n"); | ||
3428 | ✗ | ctx->b_code=1; | |
3429 | ✗ | return AVERROR_INVALIDDATA; // makes no sense to continue, as the MV decoding will break very quickly | |
3430 | } | ||
3431 | } | ||
3432 | |||
3433 |
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|
3528 | if (h->c.avctx->debug & FF_DEBUG_PICT_INFO) { |
3434 | ✗ | av_log(h->c.avctx, AV_LOG_DEBUG, | |
3435 | "qp:%d fc:%d,%d %c size:%d pro:%d alt:%d top:%d %cpel part:%d resync:%d w:%d a:%d rnd:%d vot:%d%s dc:%d ce:%d/%d/%d time:%"PRId64" tincr:%d\n", | ||
3436 | h->c.qscale, ctx->f_code, ctx->b_code, | ||
3437 | ✗ | h->c.pict_type == AV_PICTURE_TYPE_I ? 'I' : (h->c.pict_type == AV_PICTURE_TYPE_P ? 'P' : (h->c.pict_type == AV_PICTURE_TYPE_B ? 'B' : 'S')), | |
3438 | gb->size_in_bits,h->c.progressive_sequence, h->c.alternate_scan, | ||
3439 | ✗ | h->c.top_field_first, h->c.quarter_sample ? 'q' : 'h', | |
3440 | h->data_partitioning, ctx->resync_marker, | ||
3441 | ctx->num_sprite_warping_points, ctx->sprite_warping_accuracy, | ||
3442 | ✗ | 1 - h->c.no_rounding, ctx->vo_type, | |
3443 | ✗ | ctx->vol_control_parameters ? " VOLC" : " ", ctx->intra_dc_threshold, | |
3444 | ctx->cplx_estimation_trash_i, ctx->cplx_estimation_trash_p, | ||
3445 | ctx->cplx_estimation_trash_b, | ||
3446 | h->c.time, | ||
3447 | time_increment | ||
3448 | ); | ||
3449 | } | ||
3450 | |||
3451 |
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✗ Branch 1 not taken.
|
3528 | if (!ctx->scalability) { |
3452 |
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|
3528 | if (ctx->shape != RECT_SHAPE && h->c.pict_type != AV_PICTURE_TYPE_I) |
3453 | ✗ | skip_bits1(gb); // vop shape coding type | |
3454 | } else { | ||
3455 | ✗ | if (ctx->enhancement_type) { | |
3456 | ✗ | int load_backward_shape = get_bits1(gb); | |
3457 | ✗ | if (load_backward_shape) | |
3458 | ✗ | av_log(h->c.avctx, AV_LOG_ERROR, | |
3459 | "load backward shape isn't supported\n"); | ||
3460 | } | ||
3461 | ✗ | skip_bits(gb, 2); // ref_select_code | |
3462 | } | ||
3463 | } | ||
3464 | |||
3465 |
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|
3528 | h->c.dct_unquantize_intra = ctx->mpeg_quant ? ctx->dct_unquantize_mpeg2_intra |
3466 | : ctx->dct_unquantize_h263_intra; | ||
3467 | // The following tells ff_mpv_reconstruct_mb() to unquantize iff mpeg_quant | ||
3468 |
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|
3528 | h->c.dct_unquantize_inter = ctx->mpeg_quant ? ctx->dct_unquantize_mpeg2_inter : NULL; |
3469 | |||
3470 | 7040 | end: | |
3471 | /* detect buggy encoders which don't set the low_delay flag | ||
3472 | * (divx4/xvid/opendivx). Note we cannot detect divx5 without B-frames | ||
3473 | * easily (although it's buggy too) */ | ||
3474 |
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|
7040 | if (ctx->vo_type == 0 && ctx->vol_control_parameters == 0 && |
3475 |
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|
52 | ctx->divx_version == -1 && h->picture_number == 0) { |
3476 | 2 | av_log(h->c.avctx, AV_LOG_WARNING, | |
3477 | "looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag\n"); | ||
3478 | 2 | h->c.low_delay = 1; | |
3479 | } | ||
3480 | |||
3481 | 7040 | h->picture_number++; // better than pic number==0 always ;) | |
3482 | |||
3483 |
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✓ Branch 1 taken 7040 times.
|
7040 | if (h->c.workaround_bugs & FF_BUG_EDGE) { |
3484 | ✗ | h->c.h_edge_pos = h->c.width; | |
3485 | ✗ | h->c.v_edge_pos = h->c.height; | |
3486 | } | ||
3487 | 7040 | return 0; | |
3488 | } | ||
3489 | |||
3490 | 2 | static void decode_smpte_tc(Mpeg4DecContext *ctx, GetBitContext *gb) | |
3491 | { | ||
3492 | 2 | AVCodecContext *const avctx = ctx->h.c.avctx; | |
3493 | |||
3494 | 2 | skip_bits(gb, 16); /* Time_code[63..48] */ | |
3495 | 2 | check_marker(avctx, gb, "after Time_code[63..48]"); | |
3496 | 2 | skip_bits(gb, 16); /* Time_code[47..32] */ | |
3497 | 2 | check_marker(avctx, gb, "after Time_code[47..32]"); | |
3498 | 2 | skip_bits(gb, 16); /* Time_code[31..16] */ | |
3499 | 2 | check_marker(avctx, gb, "after Time_code[31..16]"); | |
3500 | 2 | skip_bits(gb, 16); /* Time_code[15..0] */ | |
3501 | 2 | check_marker(avctx, gb, "after Time_code[15..0]"); | |
3502 | 2 | skip_bits(gb, 4); /* reserved_bits */ | |
3503 | 2 | } | |
3504 | |||
3505 | /** | ||
3506 | * Decode the next studio vop header. | ||
3507 | * @return <0 if something went wrong | ||
3508 | */ | ||
3509 | 2 | static int decode_studio_vop_header(Mpeg4DecContext *ctx, GetBitContext *gb) | |
3510 | { | ||
3511 | 2 | H263DecContext *const h = &ctx->h; | |
3512 | |||
3513 |
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✓ Branch 2 taken 2 times.
|
2 | if (get_bits_left(gb) <= 32) |
3514 | ✗ | return 0; | |
3515 | |||
3516 | 2 | h->partitioned_frame = 0; | |
3517 | 2 | h->c.interlaced_dct = 0; | |
3518 | 2 | h->decode_mb = mpeg4_decode_studio_mb; | |
3519 | |||
3520 | 2 | decode_smpte_tc(ctx, gb); | |
3521 | |||
3522 | 2 | skip_bits(gb, 10); /* temporal_reference */ | |
3523 | 2 | skip_bits(gb, 2); /* vop_structure */ | |
3524 | 2 | h->c.pict_type = get_bits(gb, 2) + AV_PICTURE_TYPE_I; /* vop_coding_type */ | |
3525 |
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✗ Branch 2 not taken.
|
2 | if (get_bits1(gb)) { /* vop_coded */ |
3526 | 2 | skip_bits1(gb); /* top_field_first */ | |
3527 | 2 | skip_bits1(gb); /* repeat_first_field */ | |
3528 | 2 | h->c.progressive_frame = get_bits1(gb) ^ 1; /* progressive_frame */ | |
3529 | } | ||
3530 | |||
3531 |
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✗ Branch 1 not taken.
|
2 | if (h->c.pict_type == AV_PICTURE_TYPE_I) { |
3532 |
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✓ Branch 2 taken 2 times.
|
2 | if (get_bits1(gb)) |
3533 | ✗ | reset_studio_dc_predictors(ctx); | |
3534 | } | ||
3535 | |||
3536 |
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✗ Branch 1 not taken.
|
2 | if (ctx->shape != BIN_ONLY_SHAPE) { |
3537 | 2 | h->c.alternate_scan = get_bits1(gb); | |
3538 | 2 | h->c.frame_pred_frame_dct = get_bits1(gb); | |
3539 | 2 | ctx->dct_precision = get_bits(gb, 2); | |
3540 | 2 | h->c.intra_dc_precision = get_bits(gb, 2); | |
3541 | 2 | h->c.q_scale_type = get_bits1(gb); | |
3542 | } | ||
3543 | |||
3544 | 2 | ff_init_scantable(h->c.idsp.idct_permutation, &h->c.intra_scantable, | |
3545 |
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✓ Branch 1 taken 2 times.
|
2 | h->c.alternate_scan ? ff_alternate_vertical_scan : ff_zigzag_direct); |
3546 | |||
3547 | 2 | mpeg4_load_default_matrices(&h->c); | |
3548 | |||
3549 | 2 | next_start_code_studio(gb); | |
3550 | 2 | extension_and_user_data(&h->c, gb, 4); | |
3551 | |||
3552 | 2 | return 0; | |
3553 | } | ||
3554 | |||
3555 | ✗ | static int decode_studiovisualobject(Mpeg4DecContext *ctx, GetBitContext *gb) | |
3556 | { | ||
3557 | int visual_object_type; | ||
3558 | |||
3559 | ✗ | skip_bits(gb, 4); /* visual_object_verid */ | |
3560 | ✗ | visual_object_type = get_bits(gb, 4); | |
3561 | ✗ | if (visual_object_type != VOT_VIDEO_ID) { | |
3562 | ✗ | avpriv_request_sample(ctx->h.c.avctx, "VO type %u", visual_object_type); | |
3563 | ✗ | return AVERROR_PATCHWELCOME; | |
3564 | } | ||
3565 | |||
3566 | ✗ | next_start_code_studio(gb); | |
3567 | ✗ | extension_and_user_data(&ctx->h.c, gb, 1); | |
3568 | |||
3569 | ✗ | return 0; | |
3570 | } | ||
3571 | |||
3572 | /** | ||
3573 | * Decode MPEG-4 headers. | ||
3574 | * | ||
3575 | * @param header If set the absence of a VOP is not treated as error; otherwise, it is treated as such. | ||
3576 | * @param parse_only If set, things only relevant to a decoder may be skipped; | ||
3577 | * furthermore, the VLC tables may be uninitialized. | ||
3578 | * @return <0 if an error occurred | ||
3579 | * FRAME_SKIPPED if a not coded VOP is found | ||
3580 | * 0 else | ||
3581 | */ | ||
3582 | 7492 | int ff_mpeg4_parse_picture_header(Mpeg4DecContext *ctx, GetBitContext *gb, | |
3583 | int header, int parse_only) | ||
3584 | { | ||
3585 | 7492 | MPVContext *const s = &ctx->h.c; | |
3586 | unsigned startcode, v; | ||
3587 | int ret; | ||
3588 | 7492 | int vol = 0; | |
3589 | |||
3590 | /* search next start code */ | ||
3591 | 7492 | align_get_bits(gb); | |
3592 | |||
3593 | // If we have not switched to studio profile than we also did not switch bps | ||
3594 | // that means something else (like a previous instance) outside set bps which | ||
3595 | // would be inconsistant with the currect state, thus reset it | ||
3596 |
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|
7492 | if (!s->studio_profile && s->avctx->bits_per_raw_sample != 8) |
3597 | 7490 | s->avctx->bits_per_raw_sample = 0; | |
3598 | |||
3599 |
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|
7492 | if (s->codec_tag == AV_RL32("WV1F") && show_bits(gb, 24) == 0x575630) { |
3600 | ✗ | skip_bits(gb, 24); | |
3601 | ✗ | if (get_bits(gb, 8) == 0xF0) | |
3602 | ✗ | goto end; | |
3603 | } | ||
3604 | |||
3605 | 7492 | startcode = 0xff; | |
3606 | for (;;) { | ||
3607 |
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✓ Branch 2 taken 51306 times.
|
51748 | if (get_bits_count(gb) >= gb->size_in_bits) { |
3608 |
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✓ Branch 1 taken 442 times.
|
442 | if (gb->size_in_bits == 8 && |
3609 |
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|
442 | (ctx->divx_version >= 0 || ctx->xvid_build >= 0) || s->codec_tag == AV_RL32("QMP4")) { |
3610 | ✗ | av_log(s->avctx, AV_LOG_VERBOSE, "frame skip %d\n", gb->size_in_bits); | |
3611 | ✗ | return FRAME_SKIPPED; // divx bug | |
3612 |
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|
442 | } else if (header && get_bits_count(gb) == gb->size_in_bits) { |
3613 | 350 | return 0; // ordinary return value for parsing of extradata | |
3614 | } else | ||
3615 | 92 | return AVERROR_INVALIDDATA; // end of stream | |
3616 | } | ||
3617 | |||
3618 | /* use the bits after the test */ | ||
3619 | 51306 | v = get_bits(gb, 8); | |
3620 | 51306 | startcode = ((startcode << 8) | v) & 0xffffffff; | |
3621 | |||
3622 |
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✓ Branch 1 taken 12822 times.
|
51306 | if ((startcode & 0xFFFFFF00) != 0x100) |
3623 | 38484 | continue; // no startcode | |
3624 | |||
3625 |
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✓ Branch 1 taken 12822 times.
|
12822 | if (s->avctx->debug & FF_DEBUG_STARTCODE) { |
3626 | const char *name; | ||
3627 | ✗ | if (startcode <= 0x11F) | |
3628 | ✗ | name = "Video Object Start"; | |
3629 | ✗ | else if (startcode <= 0x12F) | |
3630 | ✗ | name = "Video Object Layer Start"; | |
3631 | ✗ | else if (startcode <= 0x13F) | |
3632 | ✗ | name = "Reserved"; | |
3633 | ✗ | else if (startcode <= 0x15F) | |
3634 | ✗ | name = "FGS bp start"; | |
3635 | ✗ | else if (startcode <= 0x1AF) | |
3636 | ✗ | name = "Reserved"; | |
3637 | ✗ | else if (startcode == 0x1B0) | |
3638 | ✗ | name = "Visual Object Seq Start"; | |
3639 | ✗ | else if (startcode == 0x1B1) | |
3640 | ✗ | name = "Visual Object Seq End"; | |
3641 | ✗ | else if (startcode == 0x1B2) | |
3642 | ✗ | name = "User Data"; | |
3643 | ✗ | else if (startcode == 0x1B3) | |
3644 | ✗ | name = "Group of VOP start"; | |
3645 | ✗ | else if (startcode == 0x1B4) | |
3646 | ✗ | name = "Video Session Error"; | |
3647 | ✗ | else if (startcode == 0x1B5) | |
3648 | ✗ | name = "Visual Object Start"; | |
3649 | ✗ | else if (startcode == 0x1B6) | |
3650 | ✗ | name = "Video Object Plane start"; | |
3651 | ✗ | else if (startcode == 0x1B7) | |
3652 | ✗ | name = "slice start"; | |
3653 | ✗ | else if (startcode == 0x1B8) | |
3654 | ✗ | name = "extension start"; | |
3655 | ✗ | else if (startcode == 0x1B9) | |
3656 | ✗ | name = "fgs start"; | |
3657 | ✗ | else if (startcode == 0x1BA) | |
3658 | ✗ | name = "FBA Object start"; | |
3659 | ✗ | else if (startcode == 0x1BB) | |
3660 | ✗ | name = "FBA Object Plane start"; | |
3661 | ✗ | else if (startcode == 0x1BC) | |
3662 | ✗ | name = "Mesh Object start"; | |
3663 | ✗ | else if (startcode == 0x1BD) | |
3664 | ✗ | name = "Mesh Object Plane start"; | |
3665 | ✗ | else if (startcode == 0x1BE) | |
3666 | ✗ | name = "Still Texture Object start"; | |
3667 | ✗ | else if (startcode == 0x1BF) | |
3668 | ✗ | name = "Texture Spatial Layer start"; | |
3669 | ✗ | else if (startcode == 0x1C0) | |
3670 | ✗ | name = "Texture SNR Layer start"; | |
3671 | ✗ | else if (startcode == 0x1C1) | |
3672 | ✗ | name = "Texture Tile start"; | |
3673 | ✗ | else if (startcode == 0x1C2) | |
3674 | ✗ | name = "Texture Shape Layer start"; | |
3675 | ✗ | else if (startcode == 0x1C3) | |
3676 | ✗ | name = "stuffing start"; | |
3677 | ✗ | else if (startcode <= 0x1C5) | |
3678 | ✗ | name = "Reserved"; | |
3679 | ✗ | else if (startcode <= 0x1FF) | |
3680 | ✗ | name = "System start"; | |
3681 | ✗ | av_log(s->avctx, AV_LOG_DEBUG, "startcode: %3X %s at %d\n", | |
3682 | startcode, name, get_bits_count(gb)); | ||
3683 | } | ||
3684 | |||
3685 |
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|
12822 | if (startcode >= 0x120 && startcode <= 0x12F) { |
3686 |
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1199 | if (vol) { |
3687 | ✗ | av_log(s->avctx, AV_LOG_WARNING, "Ignoring multiple VOL headers\n"); | |
3688 | ✗ | continue; | |
3689 | } | ||
3690 | 1199 | vol++; | |
3691 |
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|
1199 | if ((ret = decode_vol_header(ctx, gb)) < 0) |
3692 | ✗ | return ret; | |
3693 |
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11623 | } else if (startcode == USER_DATA_STARTCODE) { |
3694 | 69 | decode_user_data(ctx, gb); | |
3695 |
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11554 | } else if (startcode == GOP_STARTCODE) { |
3696 | 973 | mpeg4_decode_gop_header(s, gb); | |
3697 |
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|
10581 | } else if (startcode == VOS_STARTCODE) { |
3698 | int profile, level; | ||
3699 | 1166 | mpeg4_decode_profile_level(s, gb, &profile, &level); | |
3700 |
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1166 | if (profile == AV_PROFILE_MPEG4_SIMPLE_STUDIO && |
3701 | ✗ | (level > 0 && level < 9)) { | |
3702 | ✗ | s->studio_profile = 1; | |
3703 | ✗ | next_start_code_studio(gb); | |
3704 | ✗ | extension_and_user_data(s, gb, 0); | |
3705 |
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1166 | } else if (s->studio_profile) { |
3706 | ✗ | avpriv_request_sample(s->avctx, "Mix of studio and non studio profile"); | |
3707 | ✗ | return AVERROR_PATCHWELCOME; | |
3708 | } | ||
3709 | 1166 | s->avctx->profile = profile; | |
3710 | 1166 | s->avctx->level = level; | |
3711 |
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|
9415 | } else if (startcode == VISUAL_OBJ_STARTCODE) { |
3712 |
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1166 | if (s->studio_profile) { |
3713 | ✗ | if ((ret = decode_studiovisualobject(ctx, gb)) < 0) | |
3714 | ✗ | return ret; | |
3715 | } else | ||
3716 | 1166 | mpeg4_decode_visual_object(s, gb); | |
3717 |
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|
8249 | } else if (startcode == VOP_STARTCODE) { |
3718 | 7050 | break; | |
3719 | } | ||
3720 | |||
3721 | 5772 | align_get_bits(gb); | |
3722 | 5772 | startcode = 0xff; | |
3723 | } | ||
3724 | |||
3725 | 7050 | end: | |
3726 |
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7050 | if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY) |
3727 | ✗ | s->low_delay = 1; | |
3728 | |||
3729 |
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|
7050 | if (s->studio_profile) { |
3730 |
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|
2 | if (!s->avctx->bits_per_raw_sample) { |
3731 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Missing VOL header\n"); | |
3732 | ✗ | return AVERROR_INVALIDDATA; | |
3733 | } | ||
3734 | 2 | return decode_studio_vop_header(ctx, gb); | |
3735 | } else | ||
3736 | 7048 | return decode_vop_header(ctx, gb, parse_only); | |
3737 | } | ||
3738 | |||
3739 | 3529 | static int mpeg4_decode_picture_header(H263DecContext *const h) | |
3740 | { | ||
3741 | 3529 | Mpeg4DecContext *const ctx = h263_to_mpeg4(h); | |
3742 | |||
3743 | 3529 | h->skipped_last_frame = 0; | |
3744 | |||
3745 |
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3529 | if (ctx->bitstream_buffer) { |
3746 | 11 | int buf_size = get_bits_left(&h->gb) / 8U; | |
3747 | 11 | int bitstream_buffer_size = ctx->bitstream_buffer->size; | |
3748 | 11 | const uint8_t *buf = h->gb.buffer; | |
3749 | |||
3750 |
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11 | if (h->divx_packed) { |
3751 |
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11 | for (int i = 0; i < buf_size - 3; i++) { |
3752 |
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11 | if (buf[i] == 0 && buf[i+1] == 0 && buf[i+2] == 1) { |
3753 |
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11 | if (buf[i+3] == 0xB0) { |
3754 | ✗ | av_log(h->c.avctx, AV_LOG_WARNING, "Discarding excessive bitstream in packed xvid\n"); | |
3755 | ✗ | bitstream_buffer_size = 0; | |
3756 | } | ||
3757 | 11 | break; | |
3758 | } | ||
3759 | } | ||
3760 | } | ||
3761 | 11 | ctx->bitstream_buffer->size = 0; | |
3762 |
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|
18 | if (bitstream_buffer_size && (h->divx_packed || buf_size <= MAX_NVOP_SIZE)) {// divx 5.01+/xvid frame reorder |
3763 | 7 | int ret = init_get_bits8(&h->gb, ctx->bitstream_buffer->data, | |
3764 | bitstream_buffer_size); | ||
3765 |
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7 | if (ret < 0) |
3766 | ✗ | return ret; | |
3767 | } else | ||
3768 | 4 | av_buffer_unref(&ctx->bitstream_buffer); | |
3769 | } | ||
3770 | |||
3771 | 3529 | return ff_mpeg4_parse_picture_header(ctx, &h->gb, 0, 0); | |
3772 | } | ||
3773 | |||
3774 | 3381 | int ff_mpeg4_frame_end(AVCodecContext *avctx, const AVPacket *pkt) | |
3775 | { | ||
3776 | 3381 | Mpeg4DecContext *ctx = avctx->priv_data; | |
3777 | 3381 | H263DecContext *const h = &ctx->h; | |
3778 | int ret; | ||
3779 | |||
3780 | av_assert1(!ctx->bitstream_buffer || !ctx->bitstream_buffer->size); | ||
3781 | |||
3782 | /* divx 5.01+ bitstream reorder stuff */ | ||
3783 |
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|
3381 | if (h->divx_packed) { |
3784 |
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|
15 | int current_pos = ctx->bitstream_buffer && h->gb.buffer == ctx->bitstream_buffer->data ? 0 : (get_bits_count(&h->gb) >> 3); |
3785 | 15 | int startcode_found = 0; | |
3786 | 15 | uint8_t *buf = pkt->data; | |
3787 | 15 | int buf_size = pkt->size; | |
3788 | |||
3789 |
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15 | if (buf_size - current_pos > 7) { |
3790 | |||
3791 | int i; | ||
3792 |
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13 | for (i = current_pos; i < buf_size - 4; i++) |
3793 | |||
3794 |
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|
13 | if (buf[i] == 0 && |
3795 |
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8 | buf[i + 1] == 0 && |
3796 |
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8 | buf[i + 2] == 1 && |
3797 |
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8 | buf[i + 3] == 0xB6) { |
3798 | 8 | startcode_found = !(buf[i + 4] & 0x40); | |
3799 | 8 | break; | |
3800 | } | ||
3801 | } | ||
3802 | |||
3803 |
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|
15 | if (startcode_found) { |
3804 |
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|
8 | if (!ctx->showed_packed_warning) { |
3805 | 1 | av_log(h->c.avctx, AV_LOG_INFO, "Video uses a non-standard and " | |
3806 | "wasteful way to store B-frames ('packed B-frames'). " | ||
3807 | "Consider using the mpeg4_unpack_bframes bitstream filter without encoding but stream copy to fix it.\n"); | ||
3808 | 1 | ctx->showed_packed_warning = 1; | |
3809 | } | ||
3810 | 8 | ret = av_buffer_replace(&ctx->bitstream_buffer, pkt->buf); | |
3811 |
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8 | if (ret < 0) |
3812 | ✗ | return ret; | |
3813 | |||
3814 | 8 | ctx->bitstream_buffer->data = buf + current_pos; | |
3815 | 8 | ctx->bitstream_buffer->size = buf_size - current_pos; | |
3816 | } | ||
3817 | } | ||
3818 | |||
3819 | 3381 | return 0; | |
3820 | } | ||
3821 | |||
3822 | #if CONFIG_MPEG4_DECODER | ||
3823 | #if HAVE_THREADS | ||
3824 | 8 | static av_cold void clear_context(MpegEncContext *s) | |
3825 | { | ||
3826 | 8 | memset(&s->buffer_pools, 0, sizeof(s->buffer_pools)); | |
3827 | 8 | memset(&s->next_pic, 0, sizeof(s->next_pic)); | |
3828 | 8 | memset(&s->last_pic, 0, sizeof(s->last_pic)); | |
3829 | 8 | memset(&s->cur_pic, 0, sizeof(s->cur_pic)); | |
3830 | |||
3831 | 8 | memset(s->thread_context, 0, sizeof(s->thread_context)); | |
3832 | |||
3833 | 8 | s->ac_val_base = NULL; | |
3834 | 8 | s->ac_val = NULL; | |
3835 | 8 | memset(&s->sc, 0, sizeof(s->sc)); | |
3836 | |||
3837 | 8 | s->p_field_mv_table_base = NULL; | |
3838 |
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24 | for (int i = 0; i < 2; i++) |
3839 |
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|
48 | for (int j = 0; j < 2; j++) |
3840 | 32 | s->p_field_mv_table[i][j] = NULL; | |
3841 | |||
3842 | 8 | s->dc_val_base = NULL; | |
3843 | 8 | s->coded_block_base = NULL; | |
3844 | 8 | s->mbintra_table = NULL; | |
3845 | 8 | s->cbp_table = NULL; | |
3846 | 8 | s->pred_dir_table = NULL; | |
3847 | |||
3848 | 8 | s->mbskip_table = NULL; | |
3849 | |||
3850 | 8 | s->er.error_status_table = NULL; | |
3851 | 8 | s->er.er_temp_buffer = NULL; | |
3852 | 8 | s->mb_index2xy = NULL; | |
3853 | |||
3854 | 8 | s->context_initialized = 0; | |
3855 | 8 | s->context_reinit = 0; | |
3856 | 8 | } | |
3857 | |||
3858 | 8 | static av_cold int update_mpvctx(MpegEncContext *s, const MpegEncContext *s1) | |
3859 | { | ||
3860 | 8 | AVCodecContext *avctx = s->avctx; | |
3861 | // FIXME the following leads to a data race; instead copy only | ||
3862 | // the necessary fields. | ||
3863 | 8 | memcpy(s, s1, sizeof(*s)); | |
3864 | 8 | clear_context(s); | |
3865 | |||
3866 | 8 | s->avctx = avctx; | |
3867 | |||
3868 |
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8 | if (s1->context_initialized) { |
3869 | 8 | int err = ff_mpv_common_init(s); | |
3870 |
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|
8 | if (err < 0) |
3871 | ✗ | return err; | |
3872 | } | ||
3873 | 8 | return 0; | |
3874 | } | ||
3875 | |||
3876 | 18 | static int mpeg4_update_thread_context(AVCodecContext *dst, | |
3877 | const AVCodecContext *src) | ||
3878 | { | ||
3879 | 18 | Mpeg4DecContext *s = dst->priv_data; | |
3880 | 18 | const Mpeg4DecContext *s1 = src->priv_data; | |
3881 | 18 | int init = s->h.c.context_initialized; | |
3882 | int ret; | ||
3883 | |||
3884 |
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|
18 | if (!init) { |
3885 | 8 | ret = update_mpvctx(&s->h.c, &s1->h.c); | |
3886 |
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|
8 | if (ret < 0) |
3887 | ✗ | return ret; | |
3888 | } | ||
3889 | |||
3890 | 18 | ret = ff_mpeg_update_thread_context(dst, src); | |
3891 |
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|
18 | if (ret < 0) |
3892 | ✗ | return ret; | |
3893 | |||
3894 | // copy all the necessary fields explicitly | ||
3895 | 18 | s->time_increment_bits = s1->time_increment_bits; | |
3896 | 18 | s->shape = s1->shape; | |
3897 | 18 | s->vol_sprite_usage = s1->vol_sprite_usage; | |
3898 | 18 | s->sprite_brightness_change = s1->sprite_brightness_change; | |
3899 | 18 | s->sprite_warping_accuracy = s1->sprite_warping_accuracy; | |
3900 | 18 | s->num_sprite_warping_points = s1->num_sprite_warping_points; | |
3901 | 18 | s->h.data_partitioning = s1->h.data_partitioning; | |
3902 | 18 | s->mpeg_quant = s1->mpeg_quant; | |
3903 | 18 | s->rvlc = s1->rvlc; | |
3904 | 18 | s->resync_marker = s1->resync_marker; | |
3905 | 18 | s->t_frame = s1->t_frame; | |
3906 | 18 | s->new_pred = s1->new_pred; | |
3907 | 18 | s->enhancement_type = s1->enhancement_type; | |
3908 | 18 | s->scalability = s1->scalability; | |
3909 | 18 | s->intra_dc_threshold = s1->intra_dc_threshold; | |
3910 | 18 | s->h.divx_packed = s1->h.divx_packed; | |
3911 | 18 | s->divx_version = s1->divx_version; | |
3912 | 18 | s->divx_build = s1->divx_build; | |
3913 | 18 | s->xvid_build = s1->xvid_build; | |
3914 | 18 | s->lavc_build = s1->lavc_build; | |
3915 | 18 | s->vo_type = s1->vo_type; | |
3916 | 18 | s->showed_packed_warning = s1->showed_packed_warning; | |
3917 | 18 | s->vol_control_parameters = s1->vol_control_parameters; | |
3918 | 18 | s->cplx_estimation_trash_i = s1->cplx_estimation_trash_i; | |
3919 | 18 | s->cplx_estimation_trash_p = s1->cplx_estimation_trash_p; | |
3920 | 18 | s->cplx_estimation_trash_b = s1->cplx_estimation_trash_b; | |
3921 | 18 | s->rgb = s1->rgb; | |
3922 | |||
3923 | 18 | s->h.skipped_last_frame = s1->h.skipped_last_frame; | |
3924 | 18 | s->h.padding_bug_score = s1->h.padding_bug_score; // FIXME: racy | |
3925 | |||
3926 | 18 | s->h.picture_number = s1->h.picture_number; | |
3927 | |||
3928 | 18 | memcpy(s->sprite_shift, s1->sprite_shift, sizeof(s1->sprite_shift)); | |
3929 | 18 | memcpy(s->sprite_traj, s1->sprite_traj, sizeof(s1->sprite_traj)); | |
3930 | |||
3931 | 18 | return av_buffer_replace(&s->bitstream_buffer, s1->bitstream_buffer); | |
3932 | } | ||
3933 | |||
3934 | 12 | static int mpeg4_update_thread_context_for_user(AVCodecContext *dst, | |
3935 | const AVCodecContext *src) | ||
3936 | { | ||
3937 | 12 | H263DecContext *const h = dst->priv_data; | |
3938 | 12 | const H263DecContext *const h1 = src->priv_data; | |
3939 | |||
3940 | 12 | h->c.quarter_sample = h1->c.quarter_sample; | |
3941 | 12 | h->divx_packed = h1->divx_packed; | |
3942 | |||
3943 | 12 | return 0; | |
3944 | } | ||
3945 | #endif | ||
3946 | |||
3947 | 102 | static av_cold void mpeg4_init_static(void) | |
3948 | { | ||
3949 | static VLCElem vlc_buf[6498]; | ||
3950 | 102 | VLCInitState state = VLC_INIT_STATE(vlc_buf); | |
3951 | |||
3952 | 102 | VLC_INIT_STATIC_TABLE_FROM_LENGTHS(studio_luma_dc, STUDIO_INTRA_BITS, 19, | |
3953 | &ff_mpeg4_studio_dc_luma[0][1], 2, | ||
3954 | &ff_mpeg4_studio_dc_luma[0][0], 2, 1, | ||
3955 | 0, 0); | ||
3956 | |||
3957 | 102 | VLC_INIT_STATIC_TABLE_FROM_LENGTHS(studio_chroma_dc, STUDIO_INTRA_BITS, 19, | |
3958 | &ff_mpeg4_studio_dc_chroma[0][1], 2, | ||
3959 | &ff_mpeg4_studio_dc_chroma[0][0], 2, 1, | ||
3960 | 0, 0); | ||
3961 | |||
3962 |
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|
1326 | for (unsigned i = 0; i < 12; i++) { |
3963 | 1224 | studio_intra_tab[i] = | |
3964 | 1224 | ff_vlc_init_tables_from_lengths(&state, STUDIO_INTRA_BITS, 24, | |
3965 | 1224 | &ff_mpeg4_studio_intra[i][0][1], 2, | |
3966 | 1224 | &ff_mpeg4_studio_intra[i][0][0], 2, 1, | |
3967 | 0, 0); | ||
3968 | } | ||
3969 | |||
3970 | static uint8_t mpeg4_rl_intra_table[2][2 * MAX_RUN + MAX_LEVEL + 3]; | ||
3971 | 102 | ff_rl_init(&ff_mpeg4_rl_intra, mpeg4_rl_intra_table); | |
3972 | 102 | ff_h263_init_rl_inter(); | |
3973 | |||
3974 | 102 | INIT_FIRST_VLC_RL(ff_mpeg4_rl_intra, 554); | |
3975 |
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3366 | VLC_INIT_RL(ff_rvlc_rl_inter, 1072); |
3976 | 102 | INIT_FIRST_VLC_RL(ff_rvlc_rl_intra, 1072); | |
3977 | 102 | VLC_INIT_STATIC_TABLE(dc_lum, DC_VLC_BITS, 10 /* 13 */, | |
3978 | &ff_mpeg4_DCtab_lum[0][1], 2, 1, | ||
3979 | &ff_mpeg4_DCtab_lum[0][0], 2, 1, 0); | ||
3980 | 102 | VLC_INIT_STATIC_TABLE(dc_chrom, DC_VLC_BITS, 10 /* 13 */, | |
3981 | &ff_mpeg4_DCtab_chrom[0][1], 2, 1, | ||
3982 | &ff_mpeg4_DCtab_chrom[0][0], 2, 1, 0); | ||
3983 | 102 | VLC_INIT_STATIC_TABLE_FROM_LENGTHS(sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 15, | |
3984 | ff_sprite_trajectory_lens, 1, | ||
3985 | NULL, 0, 0, 0, 0); | ||
3986 | 102 | VLC_INIT_STATIC_SPARSE_TABLE(mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 4, | |
3987 | &ff_mb_type_b_tab[0][1], 2, 1, | ||
3988 | &ff_mb_type_b_tab[0][0], 2, 1, | ||
3989 | mb_type_b_map, 2, 2, 0); | ||
3990 | 102 | } | |
3991 | |||
3992 | 185 | static av_cold int decode_init(AVCodecContext *avctx) | |
3993 | { | ||
3994 | static AVOnce init_static_once = AV_ONCE_INIT; | ||
3995 | 185 | Mpeg4DecContext *ctx = avctx->priv_data; | |
3996 | 185 | H263DecContext *const h = &ctx->h; | |
3997 | MPVUnquantDSPContext unquant_dsp_ctx; | ||
3998 | int ret; | ||
3999 | |||
4000 | 185 | ctx->divx_version = | |
4001 | 185 | ctx->divx_build = | |
4002 | 185 | ctx->xvid_build = | |
4003 | 185 | ctx->lavc_build = -1; | |
4004 | |||
4005 |
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185 | if ((ret = ff_h263_decode_init(avctx)) < 0) |
4006 | ✗ | return ret; | |
4007 | |||
4008 | 185 | ff_mpv_unquantize_init(&unquant_dsp_ctx, | |
4009 | avctx->flags & AV_CODEC_FLAG_BITEXACT, 0); | ||
4010 | |||
4011 | 185 | ctx->dct_unquantize_h263_intra = unquant_dsp_ctx.dct_unquantize_h263_intra; | |
4012 | 185 | ctx->dct_unquantize_mpeg2_intra = unquant_dsp_ctx.dct_unquantize_mpeg2_intra; | |
4013 | // dct_unquantize_inter is only used with MPEG-2 quantizers, | ||
4014 | // so that is all we keep. | ||
4015 | 185 | ctx->dct_unquantize_mpeg2_inter = unquant_dsp_ctx.dct_unquantize_mpeg2_inter; | |
4016 | |||
4017 | 185 | h->c.y_dc_scale_table = ff_mpeg4_y_dc_scale_table; | |
4018 | 185 | h->c.c_dc_scale_table = ff_mpeg4_c_dc_scale_table; | |
4019 | |||
4020 | 185 | h->c.h263_pred = 1; | |
4021 | 185 | h->c.low_delay = 0; /* default, might be overridden in the vol header during header parsing */ | |
4022 | 185 | h->decode_header = mpeg4_decode_picture_header; | |
4023 | 185 | h->decode_mb = mpeg4_decode_mb; | |
4024 | 185 | ctx->time_increment_bits = 4; /* default value for broken headers */ | |
4025 | 185 | ctx->quant_precision = 5; | |
4026 | |||
4027 | 185 | avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; | |
4028 | |||
4029 | 185 | ff_qpeldsp_init(&h->c.qdsp); | |
4030 | 185 | ff_mpeg4videodsp_init(&ctx->mdsp); | |
4031 | |||
4032 | 185 | ff_thread_once(&init_static_once, mpeg4_init_static); | |
4033 | |||
4034 | /* Must be after initializing the MPEG-4 static tables */ | ||
4035 |
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185 | if (avctx->extradata_size && !avctx->internal->is_copy) { |
4036 | GetBitContext gb; | ||
4037 | |||
4038 |
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109 | if (init_get_bits8(&gb, avctx->extradata, avctx->extradata_size) >= 0) |
4039 | 109 | ff_mpeg4_parse_picture_header(ctx, &gb, 1, 0); | |
4040 | } | ||
4041 | |||
4042 | 185 | return 0; | |
4043 | } | ||
4044 | |||
4045 | ✗ | static av_cold void mpeg4_flush(AVCodecContext *avctx) | |
4046 | { | ||
4047 | ✗ | Mpeg4DecContext *const ctx = avctx->priv_data; | |
4048 | |||
4049 | ✗ | av_buffer_unref(&ctx->bitstream_buffer); | |
4050 | ✗ | ff_mpeg_flush(avctx); | |
4051 | ✗ | } | |
4052 | |||
4053 | 185 | static av_cold int mpeg4_close(AVCodecContext *avctx) | |
4054 | { | ||
4055 | 185 | Mpeg4DecContext *const ctx = avctx->priv_data; | |
4056 | |||
4057 | 185 | av_buffer_unref(&ctx->bitstream_buffer); | |
4058 | |||
4059 | 185 | return ff_mpv_decode_close(avctx); | |
4060 | } | ||
4061 | |||
4062 | #define OFFSET(x) offsetof(H263DecContext, x) | ||
4063 | #define FLAGS AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY | ||
4064 | static const AVOption mpeg4_options[] = { | ||
4065 | {"quarter_sample", "1/4 subpel MC", OFFSET(c.quarter_sample), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS}, | ||
4066 | {"divx_packed", "divx style packed b frames", OFFSET(divx_packed), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS}, | ||
4067 | {NULL} | ||
4068 | }; | ||
4069 | |||
4070 | static const AVClass mpeg4_class = { | ||
4071 | .class_name = "MPEG4 Video Decoder", | ||
4072 | .item_name = av_default_item_name, | ||
4073 | .option = mpeg4_options, | ||
4074 | .version = LIBAVUTIL_VERSION_INT, | ||
4075 | }; | ||
4076 | |||
4077 | const FFCodec ff_mpeg4_decoder = { | ||
4078 | .p.name = "mpeg4", | ||
4079 | CODEC_LONG_NAME("MPEG-4 part 2"), | ||
4080 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
4081 | .p.id = AV_CODEC_ID_MPEG4, | ||
4082 | .priv_data_size = sizeof(Mpeg4DecContext), | ||
4083 | .init = decode_init, | ||
4084 | FF_CODEC_DECODE_CB(ff_h263_decode_frame), | ||
4085 | .close = mpeg4_close, | ||
4086 | .p.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 | | ||
4087 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_FRAME_THREADS, | ||
4088 | .caps_internal = FF_CODEC_CAP_INIT_CLEANUP | | ||
4089 | FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM, | ||
4090 | .flush = mpeg4_flush, | ||
4091 | .p.max_lowres = 3, | ||
4092 | .p.profiles = NULL_IF_CONFIG_SMALL(ff_mpeg4_video_profiles), | ||
4093 | UPDATE_THREAD_CONTEXT(mpeg4_update_thread_context), | ||
4094 | UPDATE_THREAD_CONTEXT_FOR_USER(mpeg4_update_thread_context_for_user), | ||
4095 | .p.priv_class = &mpeg4_class, | ||
4096 | .hw_configs = (const AVCodecHWConfigInternal *const []) { | ||
4097 | #if CONFIG_MPEG4_NVDEC_HWACCEL | ||
4098 | HWACCEL_NVDEC(mpeg4), | ||
4099 | #endif | ||
4100 | #if CONFIG_MPEG4_VAAPI_HWACCEL | ||
4101 | HWACCEL_VAAPI(mpeg4), | ||
4102 | #endif | ||
4103 | #if CONFIG_MPEG4_VDPAU_HWACCEL | ||
4104 | HWACCEL_VDPAU(mpeg4), | ||
4105 | #endif | ||
4106 | #if CONFIG_MPEG4_VIDEOTOOLBOX_HWACCEL | ||
4107 | HWACCEL_VIDEOTOOLBOX(mpeg4), | ||
4108 | #endif | ||
4109 | NULL | ||
4110 | }, | ||
4111 | }; | ||
4112 | #endif /* CONFIG_MPEG4_DECODER */ | ||
4113 |