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1 | /* | ||
2 | * RV10/RV20 decoder | ||
3 | * Copyright (c) 2000,2001 Fabrice Bellard | ||
4 | * Copyright (c) 2002-2004 Michael Niedermayer | ||
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 | /** | ||
24 | * @file | ||
25 | * RV10/RV20 decoder | ||
26 | */ | ||
27 | |||
28 | #include <inttypes.h> | ||
29 | |||
30 | #include "libavutil/imgutils.h" | ||
31 | #include "libavutil/thread.h" | ||
32 | |||
33 | #include "avcodec.h" | ||
34 | #include "codec_internal.h" | ||
35 | #include "decode.h" | ||
36 | #include "error_resilience.h" | ||
37 | #include "h263.h" | ||
38 | #include "h263data.h" | ||
39 | #include "h263dec.h" | ||
40 | #include "mpeg_er.h" | ||
41 | #include "mpegutils.h" | ||
42 | #include "mpegvideo.h" | ||
43 | #include "mpegvideodec.h" | ||
44 | #include "mpeg4video.h" | ||
45 | #include "mpegvideodata.h" | ||
46 | #include "rv10dec.h" | ||
47 | |||
48 | #define RV_GET_MAJOR_VER(x) ((x) >> 28) | ||
49 | #define RV_GET_MINOR_VER(x) (((x) >> 20) & 0xFF) | ||
50 | #define RV_GET_MICRO_VER(x) (((x) >> 12) & 0xFF) | ||
51 | |||
52 | #define MAX_VLC_ENTRIES 1023 // Note: Does not include the skip entries. | ||
53 | #define DC_VLC_BITS 9 | ||
54 | |||
55 | typedef struct RVDecContext { | ||
56 | MpegEncContext m; | ||
57 | int sub_id; | ||
58 | int orig_width, orig_height; | ||
59 | } RVDecContext; | ||
60 | |||
61 | /* (run, length) encoded value for the symbols table. The actual symbols | ||
62 | * are run..run - length (mod 256). | ||
63 | * The last two entries in the following table apply to luma only. | ||
64 | * The skip values are not included in this list. */ | ||
65 | static const uint8_t rv_sym_run_len[][2] = { | ||
66 | { 0, 0 }, { 1, 0 }, { 255, 0 }, { 3, 1 }, { 254, 1 }, | ||
67 | { 7, 3 }, { 252, 3 }, { 15, 7 }, { 248, 7 }, { 31, 15 }, | ||
68 | { 240, 15 }, { 63, 31 }, { 224, 31 }, { 127, 63 }, { 192, 63 }, | ||
69 | { 255, 127 }, { 128, 127 }, { 127, 255 }, { 128, 255 }, | ||
70 | }; | ||
71 | |||
72 | /* entry[i] of the following tables gives | ||
73 | * the number of VLC codes of length i + 2. */ | ||
74 | static const uint16_t rv_lum_len_count[15] = { | ||
75 | 1, 0, 2, 4, 8, 16, 32, 0, 64, 0, 128, 0, 256, 0, 512, | ||
76 | }; | ||
77 | |||
78 | static const uint16_t rv_chrom_len_count[15] = { | ||
79 | 1, 2, 4, 0, 8, 0, 16, 0, 32, 0, 64, 0, 128, 0, 256, | ||
80 | }; | ||
81 | |||
82 | static VLC rv_dc_lum, rv_dc_chrom; | ||
83 | |||
84 | ✗ | int ff_rv_decode_dc(MpegEncContext *s, int n) | |
85 | { | ||
86 | int code; | ||
87 | |||
88 | ✗ | if (n < 4) { | |
89 | ✗ | code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2); | |
90 | } else { | ||
91 | ✗ | code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2); | |
92 | ✗ | if (code < 0) { | |
93 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n"); | |
94 | ✗ | return -1; | |
95 | } | ||
96 | } | ||
97 | ✗ | return code; | |
98 | } | ||
99 | |||
100 | /* read RV 1.0 compatible frame header */ | ||
101 | 150 | static int rv10_decode_picture_header(MpegEncContext *s) | |
102 | { | ||
103 | int mb_count, pb_frame, marker, mb_xy; | ||
104 | |||
105 | 150 | marker = get_bits1(&s->gb); | |
106 | |||
107 |
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150 | if (get_bits1(&s->gb)) |
108 | 135 | s->pict_type = AV_PICTURE_TYPE_P; | |
109 | else | ||
110 | 15 | s->pict_type = AV_PICTURE_TYPE_I; | |
111 | |||
112 |
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150 | if (!marker) |
113 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "marker missing\n"); | |
114 | |||
115 | 150 | pb_frame = get_bits1(&s->gb); | |
116 | |||
117 | ff_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame); | ||
118 | |||
119 |
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150 | if (pb_frame) { |
120 | ✗ | avpriv_request_sample(s->avctx, "PB-frame"); | |
121 | ✗ | return AVERROR_PATCHWELCOME; | |
122 | } | ||
123 | |||
124 | 150 | s->qscale = get_bits(&s->gb, 5); | |
125 |
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150 | if (s->qscale == 0) { |
126 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n"); | |
127 | ✗ | return AVERROR_INVALIDDATA; | |
128 | } | ||
129 | |||
130 |
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150 | if (s->pict_type == AV_PICTURE_TYPE_I) { |
131 |
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15 | if (s->rv10_version == 3) { |
132 | /* specific MPEG like DC coding not used */ | ||
133 | ✗ | s->last_dc[0] = get_bits(&s->gb, 8); | |
134 | ✗ | s->last_dc[1] = get_bits(&s->gb, 8); | |
135 | ✗ | s->last_dc[2] = get_bits(&s->gb, 8); | |
136 | ff_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0], | ||
137 | s->last_dc[1], s->last_dc[2]); | ||
138 | } | ||
139 | } | ||
140 | /* if multiple packets per frame are sent, the position at which | ||
141 | * to display the macroblocks is coded here */ | ||
142 | |||
143 | 150 | mb_xy = s->mb_x + s->mb_y * s->mb_width; | |
144 |
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150 | if (show_bits(&s->gb, 12) == 0 || (mb_xy && mb_xy < s->mb_num)) { |
145 | 150 | s->mb_x = get_bits(&s->gb, 6); /* mb_x */ | |
146 | 150 | s->mb_y = get_bits(&s->gb, 6); /* mb_y */ | |
147 | 150 | mb_count = get_bits(&s->gb, 12); | |
148 | } else { | ||
149 | ✗ | s->mb_x = 0; | |
150 | ✗ | s->mb_y = 0; | |
151 | ✗ | mb_count = s->mb_width * s->mb_height; | |
152 | } | ||
153 | 150 | skip_bits(&s->gb, 3); /* ignored */ | |
154 | 150 | s->f_code = 1; | |
155 | |||
156 | 150 | return mb_count; | |
157 | } | ||
158 | |||
159 | 742 | static int rv20_decode_picture_header(RVDecContext *rv, int whole_size) | |
160 | { | ||
161 | 742 | MpegEncContext *s = &rv->m; | |
162 | int seq, mb_pos, i, ret; | ||
163 | int rpr_max; | ||
164 | |||
165 | 742 | i = get_bits(&s->gb, 2); | |
166 |
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742 | switch (i) { |
167 | 52 | case 0: | |
168 | 52 | s->pict_type = AV_PICTURE_TYPE_I; | |
169 | 52 | break; | |
170 | 15 | case 1: | |
171 | 15 | s->pict_type = AV_PICTURE_TYPE_I; | |
172 | 15 | break; // hmm ... | |
173 | 494 | case 2: | |
174 | 494 | s->pict_type = AV_PICTURE_TYPE_P; | |
175 | 494 | break; | |
176 | 181 | case 3: | |
177 | 181 | s->pict_type = AV_PICTURE_TYPE_B; | |
178 | 181 | break; | |
179 | ✗ | default: | |
180 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n"); | |
181 | ✗ | return AVERROR_INVALIDDATA; | |
182 | } | ||
183 | |||
184 |
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742 | if (s->low_delay && s->pict_type == AV_PICTURE_TYPE_B) { |
185 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "low delay B\n"); | |
186 | ✗ | return -1; | |
187 | } | ||
188 |
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742 | if (!s->last_picture_ptr && s->pict_type == AV_PICTURE_TYPE_B) { |
189 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "early B-frame\n"); | |
190 | ✗ | return AVERROR_INVALIDDATA; | |
191 | } | ||
192 | |||
193 |
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742 | if (get_bits1(&s->gb)) { |
194 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n"); | |
195 | ✗ | return AVERROR_INVALIDDATA; | |
196 | } | ||
197 | |||
198 | 742 | s->qscale = get_bits(&s->gb, 5); | |
199 |
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742 | if (s->qscale == 0) { |
200 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n"); | |
201 | ✗ | return AVERROR_INVALIDDATA; | |
202 | } | ||
203 | |||
204 |
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742 | if (RV_GET_MINOR_VER(rv->sub_id) >= 2) |
205 |
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592 | s->loop_filter = get_bits1(&s->gb) && !s->avctx->lowres; |
206 | |||
207 |
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742 | if (RV_GET_MINOR_VER(rv->sub_id) <= 1) |
208 | 150 | seq = get_bits(&s->gb, 8) << 7; | |
209 | else | ||
210 | 592 | seq = get_bits(&s->gb, 13) << 2; | |
211 | |||
212 | 742 | rpr_max = s->avctx->extradata[1] & 7; | |
213 |
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742 | if (rpr_max) { |
214 | int f, new_w, new_h; | ||
215 | 592 | int rpr_bits = av_log2(rpr_max) + 1; | |
216 | |||
217 | 592 | f = get_bits(&s->gb, rpr_bits); | |
218 | |||
219 |
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592 | if (f) { |
220 | ✗ | if (s->avctx->extradata_size < 8 + 2 * f) { | |
221 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Extradata too small.\n"); | |
222 | ✗ | return AVERROR_INVALIDDATA; | |
223 | } | ||
224 | |||
225 | ✗ | new_w = 4 * ((uint8_t *) s->avctx->extradata)[6 + 2 * f]; | |
226 | ✗ | new_h = 4 * ((uint8_t *) s->avctx->extradata)[7 + 2 * f]; | |
227 | } else { | ||
228 | 592 | new_w = rv->orig_width; | |
229 | 592 | new_h = rv->orig_height; | |
230 | } | ||
231 |
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592 | if (new_w != s->width || new_h != s->height || !s->context_initialized) { |
232 | ✗ | AVRational old_aspect = s->avctx->sample_aspect_ratio; | |
233 | ✗ | av_log(s->avctx, AV_LOG_DEBUG, | |
234 | "attempting to change resolution to %dx%d\n", new_w, new_h); | ||
235 | ✗ | if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0) | |
236 | ✗ | return AVERROR_INVALIDDATA; | |
237 | |||
238 | ✗ | if (whole_size < (new_w + 15)/16 * ((new_h + 15)/16) / 8) | |
239 | ✗ | return AVERROR_INVALIDDATA; | |
240 | |||
241 | ✗ | ff_mpv_common_end(s); | |
242 | |||
243 | // attempt to keep aspect during typical resolution switches | ||
244 | ✗ | if (!old_aspect.num) | |
245 | ✗ | old_aspect = (AVRational){1, 1}; | |
246 | ✗ | if (2 * (int64_t)new_w * s->height == (int64_t)new_h * s->width) | |
247 | ✗ | s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){2, 1}); | |
248 | ✗ | if ((int64_t)new_w * s->height == 2 * (int64_t)new_h * s->width) | |
249 | ✗ | s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){1, 2}); | |
250 | |||
251 | ✗ | ret = ff_set_dimensions(s->avctx, new_w, new_h); | |
252 | ✗ | if (ret < 0) | |
253 | ✗ | return ret; | |
254 | |||
255 | ✗ | s->width = new_w; | |
256 | ✗ | s->height = new_h; | |
257 | ✗ | if ((ret = ff_mpv_common_init(s)) < 0) | |
258 | ✗ | return ret; | |
259 | } | ||
260 | |||
261 |
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592 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) { |
262 | ✗ | av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d/%d\n", f, rpr_bits, rpr_max); | |
263 | } | ||
264 | } | ||
265 |
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742 | if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0) |
266 | ✗ | return AVERROR_INVALIDDATA; | |
267 | |||
268 | 742 | mb_pos = ff_h263_decode_mba(s); | |
269 | |||
270 | 742 | seq |= s->time & ~0x7FFF; | |
271 |
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742 | if (seq - s->time > 0x4000) |
272 | ✗ | seq -= 0x8000; | |
273 |
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742 | if (seq - s->time < -0x4000) |
274 | ✗ | seq += 0x8000; | |
275 | |||
276 |
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742 | if (seq != s->time) { |
277 |
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292 | if (s->pict_type != AV_PICTURE_TYPE_B) { |
278 | 220 | s->time = seq; | |
279 | 220 | s->pp_time = s->time - s->last_non_b_time; | |
280 | 220 | s->last_non_b_time = s->time; | |
281 | } else { | ||
282 | 72 | s->time = seq; | |
283 | 72 | s->pb_time = s->pp_time - (s->last_non_b_time - s->time); | |
284 | } | ||
285 | } | ||
286 |
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742 | if (s->pict_type == AV_PICTURE_TYPE_B) { |
287 |
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181 | if (s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0) { |
288 | ✗ | av_log(s->avctx, AV_LOG_DEBUG, | |
289 | "messed up order, possible from seeking? skipping current B-frame\n"); | ||
290 | #define ERROR_SKIP_FRAME -123 | ||
291 | ✗ | return ERROR_SKIP_FRAME; | |
292 | } | ||
293 | 181 | ff_mpeg4_init_direct_mv(s); | |
294 | } | ||
295 | |||
296 | 742 | s->no_rounding = get_bits1(&s->gb); | |
297 | |||
298 |
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742 | if (RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B) |
299 | // binary decoder reads 3+2 bits here but they don't seem to be used | ||
300 | ✗ | skip_bits(&s->gb, 5); | |
301 | |||
302 | 742 | s->f_code = 1; | |
303 | 742 | s->h263_aic = s->pict_type == AV_PICTURE_TYPE_I; | |
304 | 742 | s->modified_quant = 1; | |
305 |
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742 | if (!s->avctx->lowres) |
306 | 150 | s->loop_filter = 1; | |
307 | |||
308 |
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742 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) { |
309 | ✗ | av_log(s->avctx, AV_LOG_INFO, | |
310 | "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n", | ||
311 | seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, | ||
312 | s->no_rounding); | ||
313 | } | ||
314 | |||
315 |
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742 | av_assert0(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay); |
316 | |||
317 | 742 | return s->mb_width * s->mb_height - mb_pos; | |
318 | } | ||
319 | |||
320 | 26 | static av_cold void rv10_build_vlc(VLC *vlc, const uint16_t len_count[15], | |
321 | const uint8_t sym_rl[][2], int sym_rl_elems) | ||
322 | { | ||
323 | uint16_t syms[MAX_VLC_ENTRIES]; | ||
324 | uint8_t lens[MAX_VLC_ENTRIES]; | ||
325 | 26 | unsigned nb_syms = 0, nb_lens = 0; | |
326 | |||
327 |
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494 | for (unsigned i = 0; i < sym_rl_elems; i++) { |
328 | 468 | unsigned cur_sym = sym_rl[i][0]; | |
329 |
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20410 | for (unsigned tmp = nb_syms + sym_rl[i][1]; nb_syms <= tmp; nb_syms++) |
330 | 19942 | syms[nb_syms] = 0xFF & cur_sym--; | |
331 | } | ||
332 | |||
333 |
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416 | for (unsigned i = 0; i < 15; i++) |
334 |
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20332 | for (unsigned tmp = nb_lens + len_count[i]; nb_lens < tmp; nb_lens++) |
335 | 19942 | lens[nb_lens] = i + 2; | |
336 | av_assert1(nb_lens == nb_syms); | ||
337 | 26 | ff_init_vlc_from_lengths(vlc, DC_VLC_BITS, nb_lens, lens, 1, | |
338 | syms, 2, 2, 0, INIT_VLC_STATIC_OVERLONG, NULL); | ||
339 | 26 | } | |
340 | |||
341 | 13 | static av_cold void rv10_init_static(void) | |
342 | { | ||
343 | static VLCElem table[1472 + 992]; | ||
344 | |||
345 | 13 | rv_dc_lum.table = table; | |
346 | 13 | rv_dc_lum.table_allocated = 1472; | |
347 | 13 | rv10_build_vlc(&rv_dc_lum, rv_lum_len_count, | |
348 | rv_sym_run_len, FF_ARRAY_ELEMS(rv_sym_run_len)); | ||
349 |
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65 | for (int i = 0; i < 1 << (DC_VLC_BITS - 7 /* Length of skip prefix */); i++) { |
350 | /* All codes beginning with 0x7F have the same length and value. | ||
351 | * Modifying the table directly saves us the useless subtables. */ | ||
352 | 52 | rv_dc_lum.table[(0x7F << (DC_VLC_BITS - 7)) + i].sym = 255; | |
353 | 52 | rv_dc_lum.table[(0x7F << (DC_VLC_BITS - 7)) + i].len = 18; | |
354 | } | ||
355 | 13 | rv_dc_chrom.table = &table[1472]; | |
356 | 13 | rv_dc_chrom.table_allocated = 992; | |
357 | 13 | rv10_build_vlc(&rv_dc_chrom, rv_chrom_len_count, | |
358 | rv_sym_run_len, FF_ARRAY_ELEMS(rv_sym_run_len) - 2); | ||
359 |
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26 | for (int i = 0; i < 1 << (DC_VLC_BITS - 9 /* Length of skip prefix */); i++) { |
360 | /* Same as above. */ | ||
361 | 13 | rv_dc_chrom.table[(0x1FE << (DC_VLC_BITS - 9)) + i].sym = 255; | |
362 | 13 | rv_dc_chrom.table[(0x1FE << (DC_VLC_BITS - 9)) + i].len = 18; | |
363 | } | ||
364 | 13 | ff_h263_decode_init_vlc(); | |
365 | 13 | } | |
366 | |||
367 | 20 | static av_cold int rv10_decode_init(AVCodecContext *avctx) | |
368 | { | ||
369 | static AVOnce init_static_once = AV_ONCE_INIT; | ||
370 | 20 | RVDecContext *rv = avctx->priv_data; | |
371 | 20 | MpegEncContext *s = &rv->m; | |
372 | int major_ver, minor_ver, micro_ver, ret; | ||
373 | |||
374 |
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20 | if (avctx->extradata_size < 8) { |
375 | ✗ | av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n"); | |
376 | ✗ | return AVERROR_INVALIDDATA; | |
377 | } | ||
378 |
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20 | if ((ret = av_image_check_size(avctx->coded_width, |
379 | 20 | avctx->coded_height, 0, avctx)) < 0) | |
380 | ✗ | return ret; | |
381 | |||
382 | 20 | ff_mpv_decode_init(s, avctx); | |
383 | |||
384 | 20 | s->out_format = FMT_H263; | |
385 | |||
386 | 20 | rv->orig_width = | |
387 | 20 | s->width = avctx->coded_width; | |
388 | 20 | rv->orig_height = | |
389 | 20 | s->height = avctx->coded_height; | |
390 | |||
391 | 20 | s->h263_long_vectors = ((uint8_t *) avctx->extradata)[3] & 1; | |
392 | 20 | rv->sub_id = AV_RB32((uint8_t *) avctx->extradata + 4); | |
393 | |||
394 | 20 | major_ver = RV_GET_MAJOR_VER(rv->sub_id); | |
395 | 20 | minor_ver = RV_GET_MINOR_VER(rv->sub_id); | |
396 | 20 | micro_ver = RV_GET_MICRO_VER(rv->sub_id); | |
397 | |||
398 | 20 | s->low_delay = 1; | |
399 |
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20 | switch (major_ver) { |
400 | 9 | case 1: | |
401 |
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9 | s->rv10_version = micro_ver ? 3 : 1; |
402 | 9 | s->obmc = micro_ver == 2; | |
403 | 9 | break; | |
404 | 11 | case 2: | |
405 |
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11 | if (minor_ver >= 2) { |
406 | 3 | s->low_delay = 0; | |
407 | 3 | s->avctx->has_b_frames = 1; | |
408 | } | ||
409 | 11 | break; | |
410 | ✗ | default: | |
411 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id); | |
412 | ✗ | avpriv_request_sample(avctx, "RV1/2 version"); | |
413 | ✗ | return AVERROR_PATCHWELCOME; | |
414 | } | ||
415 | |||
416 |
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20 | if (avctx->debug & FF_DEBUG_PICT_INFO) { |
417 | ✗ | av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%"PRIX32"\n", rv->sub_id, | |
418 | ✗ | ((uint32_t *) avctx->extradata)[0]); | |
419 | } | ||
420 | |||
421 | 20 | avctx->pix_fmt = AV_PIX_FMT_YUV420P; | |
422 | |||
423 | 20 | ff_mpv_idct_init(s); | |
424 |
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20 | if ((ret = ff_mpv_common_init(s)) < 0) |
425 | ✗ | return ret; | |
426 | |||
427 | 20 | ff_h263dsp_init(&s->h263dsp); | |
428 | |||
429 | /* init static VLCs */ | ||
430 | 20 | ff_thread_once(&init_static_once, rv10_init_static); | |
431 | |||
432 | 20 | return 0; | |
433 | } | ||
434 | |||
435 | 20 | static av_cold int rv10_decode_end(AVCodecContext *avctx) | |
436 | { | ||
437 | 20 | MpegEncContext *s = avctx->priv_data; | |
438 | |||
439 | 20 | ff_mpv_common_end(s); | |
440 | 20 | return 0; | |
441 | } | ||
442 | |||
443 | 892 | static int rv10_decode_packet(AVCodecContext *avctx, const uint8_t *buf, | |
444 | int buf_size, int buf_size2, int whole_size) | ||
445 | { | ||
446 | 892 | RVDecContext *rv = avctx->priv_data; | |
447 | 892 | MpegEncContext *s = &rv->m; | |
448 | int mb_count, mb_pos, left, start_mb_x, active_bits_size, ret; | ||
449 | |||
450 | 892 | active_bits_size = buf_size * 8; | |
451 | 892 | init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8); | |
452 |
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892 | if (s->codec_id == AV_CODEC_ID_RV10) |
453 | 150 | mb_count = rv10_decode_picture_header(s); | |
454 | else | ||
455 | 742 | mb_count = rv20_decode_picture_header(rv, whole_size); | |
456 |
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892 | if (mb_count < 0) { |
457 | ✗ | if (mb_count != ERROR_SKIP_FRAME) | |
458 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n"); | |
459 | ✗ | return AVERROR_INVALIDDATA; | |
460 | } | ||
461 | |||
462 |
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892 | if (s->mb_x >= s->mb_width || |
463 |
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892 | s->mb_y >= s->mb_height) { |
464 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y); | |
465 | ✗ | return AVERROR_INVALIDDATA; | |
466 | } | ||
467 | 892 | mb_pos = s->mb_y * s->mb_width + s->mb_x; | |
468 | 892 | left = s->mb_width * s->mb_height - mb_pos; | |
469 |
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892 | if (mb_count > left) { |
470 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n"); | |
471 | ✗ | return AVERROR_INVALIDDATA; | |
472 | } | ||
473 | |||
474 |
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892 | if (whole_size < s->mb_width * s->mb_height / 8) |
475 | ✗ | return AVERROR_INVALIDDATA; | |
476 | |||
477 |
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892 | if ((s->mb_x == 0 && s->mb_y == 0) || !s->current_picture_ptr) { |
478 | // FIXME write parser so we always have complete frames? | ||
479 |
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445 | if (s->current_picture_ptr) { |
480 | ✗ | ff_er_frame_end(&s->er); | |
481 | ✗ | ff_mpv_frame_end(s); | |
482 | ✗ | s->mb_x = s->mb_y = s->resync_mb_x = s->resync_mb_y = 0; | |
483 | } | ||
484 |
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445 | if ((ret = ff_mpv_frame_start(s, avctx)) < 0) |
485 | ✗ | return ret; | |
486 | 445 | ff_mpeg_er_frame_start(s); | |
487 | } else { | ||
488 |
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447 | if (s->current_picture_ptr->f->pict_type != s->pict_type) { |
489 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n"); | |
490 | ✗ | return AVERROR_INVALIDDATA; | |
491 | } | ||
492 | } | ||
493 | |||
494 | |||
495 | ff_dlog(avctx, "qscale=%d\n", s->qscale); | ||
496 | |||
497 | /* default quantization values */ | ||
498 |
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892 | if (s->codec_id == AV_CODEC_ID_RV10) { |
499 |
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150 | if (s->mb_y == 0) |
500 | 150 | s->first_slice_line = 1; | |
501 | } else { | ||
502 | 742 | s->first_slice_line = 1; | |
503 | 742 | s->resync_mb_x = s->mb_x; | |
504 | } | ||
505 | 892 | start_mb_x = s->mb_x; | |
506 | 892 | s->resync_mb_y = s->mb_y; | |
507 |
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892 | if (s->h263_aic) { |
508 | 67 | s->y_dc_scale_table = | |
509 | 67 | s->c_dc_scale_table = ff_aic_dc_scale_table; | |
510 | } else { | ||
511 | 825 | s->y_dc_scale_table = | |
512 | 825 | s->c_dc_scale_table = ff_mpeg1_dc_scale_table; | |
513 | } | ||
514 | |||
515 |
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892 | if (s->modified_quant) |
516 | 742 | s->chroma_qscale_table = ff_h263_chroma_qscale_table; | |
517 | |||
518 | 892 | ff_set_qscale(s, s->qscale); | |
519 | |||
520 | 892 | s->rv10_first_dc_coded[0] = 0; | |
521 | 892 | s->rv10_first_dc_coded[1] = 0; | |
522 | 892 | s->rv10_first_dc_coded[2] = 0; | |
523 | 892 | s->block_wrap[0] = | |
524 | 892 | s->block_wrap[1] = | |
525 | 892 | s->block_wrap[2] = | |
526 | 892 | s->block_wrap[3] = s->b8_stride; | |
527 | 892 | s->block_wrap[4] = | |
528 | 892 | s->block_wrap[5] = s->mb_stride; | |
529 | 892 | ff_init_block_index(s); | |
530 | |||
531 | /* decode each macroblock */ | ||
532 |
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162300 | for (s->mb_num_left = mb_count; s->mb_num_left > 0; s->mb_num_left--) { |
533 | int ret; | ||
534 | 162300 | ff_update_block_index(s, 8, s->avctx->lowres, 1); | |
535 | ff_tlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y); | ||
536 | |||
537 | 162300 | s->mv_dir = MV_DIR_FORWARD; | |
538 | 162300 | s->mv_type = MV_TYPE_16X16; | |
539 | 162300 | ret = ff_h263_decode_mb(s, s->block); | |
540 | |||
541 | // Repeat the slice end check from ff_h263_decode_mb with our active | ||
542 | // bitstream size | ||
543 |
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162300 | if (ret != SLICE_ERROR && active_bits_size >= get_bits_count(&s->gb)) { |
544 | 162300 | int v = show_bits(&s->gb, 16); | |
545 | |||
546 |
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162300 | if (get_bits_count(&s->gb) + 16 > active_bits_size) |
547 | 1341 | v >>= get_bits_count(&s->gb) + 16 - active_bits_size; | |
548 | |||
549 |
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162300 | if (!v) |
550 | 892 | ret = SLICE_END; | |
551 | } | ||
552 |
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162300 | if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) && |
553 | ✗ | 8 * buf_size2 >= get_bits_count(&s->gb)) { | |
554 | ✗ | active_bits_size = buf_size2 * 8; | |
555 | ✗ | av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n", | |
556 | 8 * buf_size, active_bits_size); | ||
557 | ✗ | ret = SLICE_OK; | |
558 | } | ||
559 | |||
560 |
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162300 | if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) { |
561 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, | |
562 | s->mb_y); | ||
563 | ✗ | return AVERROR_INVALIDDATA; | |
564 | } | ||
565 |
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162300 | if (s->pict_type != AV_PICTURE_TYPE_B) |
566 | 140700 | ff_h263_update_motion_val(s); | |
567 | 162300 | ff_mpv_reconstruct_mb(s, s->block); | |
568 |
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162300 | if (s->loop_filter) |
569 | 59400 | ff_h263_loop_filter(s); | |
570 | |||
571 |
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162300 | if (++s->mb_x == s->mb_width) { |
572 | 7575 | s->mb_x = 0; | |
573 | 7575 | s->mb_y++; | |
574 | 7575 | ff_init_block_index(s); | |
575 | } | ||
576 |
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162300 | if (s->mb_x == s->resync_mb_x) |
577 | 7297 | s->first_slice_line = 0; | |
578 |
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162300 | if (ret == SLICE_END) |
579 | 892 | break; | |
580 | } | ||
581 | |||
582 | 892 | ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x - 1, s->mb_y, | |
583 | ER_MB_END); | ||
584 | |||
585 | 892 | return active_bits_size; | |
586 | } | ||
587 | |||
588 | 1667 | static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n) | |
589 | { | ||
590 | 1667 | return AV_RL32(buf + n * 8); | |
591 | } | ||
592 | |||
593 | 449 | static int rv10_decode_frame(AVCodecContext *avctx, AVFrame *pict, | |
594 | int *got_frame, AVPacket *avpkt) | ||
595 | { | ||
596 | 449 | const uint8_t *buf = avpkt->data; | |
597 | 449 | int buf_size = avpkt->size; | |
598 | 449 | MpegEncContext *s = avctx->priv_data; | |
599 | int i, ret; | ||
600 | int slice_count; | ||
601 | 449 | const uint8_t *slices_hdr = NULL; | |
602 | |||
603 | ff_dlog(avctx, "*****frame %"PRId64" size=%d\n", avctx->frame_num, buf_size); | ||
604 | |||
605 | /* no supplementary picture */ | ||
606 |
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449 | if (buf_size == 0) { |
607 | 4 | return 0; | |
608 | } | ||
609 | |||
610 | 445 | slice_count = (*buf++) + 1; | |
611 | 445 | buf_size--; | |
612 | |||
613 |
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445 | if (!slice_count || buf_size <= 8 * slice_count) { |
614 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n", | |
615 | slice_count); | ||
616 | ✗ | return AVERROR_INVALIDDATA; | |
617 | } | ||
618 | |||
619 | 445 | slices_hdr = buf + 4; | |
620 | 445 | buf += 8 * slice_count; | |
621 | 445 | buf_size -= 8 * slice_count; | |
622 | |||
623 |
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1337 | for (i = 0; i < slice_count; i++) { |
624 | 892 | unsigned offset = get_slice_offset(avctx, slices_hdr, i); | |
625 | int size, size2; | ||
626 | |||
627 |
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892 | if (offset >= buf_size) |
628 | ✗ | return AVERROR_INVALIDDATA; | |
629 | |||
630 |
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892 | if (i + 1 == slice_count) |
631 | 445 | size = buf_size - offset; | |
632 | else | ||
633 | 447 | size = get_slice_offset(avctx, slices_hdr, i + 1) - offset; | |
634 | |||
635 |
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892 | if (i + 2 >= slice_count) |
636 | 564 | size2 = buf_size - offset; | |
637 | else | ||
638 | 328 | size2 = get_slice_offset(avctx, slices_hdr, i + 2) - offset; | |
639 | |||
640 |
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892 | if (size <= 0 || size2 <= 0 || |
641 |
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892 | offset + FFMAX(size, size2) > buf_size) |
642 | ✗ | return AVERROR_INVALIDDATA; | |
643 | |||
644 |
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892 | if ((ret = rv10_decode_packet(avctx, buf + offset, size, size2, buf_size)) < 0) |
645 | ✗ | return ret; | |
646 | |||
647 |
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892 | if (ret > 8 * size) |
648 | ✗ | i++; | |
649 | } | ||
650 | |||
651 |
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445 | if (s->current_picture_ptr && s->mb_y >= s->mb_height) { |
652 | 445 | ff_er_frame_end(&s->er); | |
653 | 445 | ff_mpv_frame_end(s); | |
654 | |||
655 |
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445 | if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) { |
656 |
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372 | if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0) |
657 | ✗ | return ret; | |
658 | 372 | ff_print_debug_info(s, s->current_picture_ptr, pict); | |
659 | 372 | ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_MPV_QSCALE_TYPE_MPEG1); | |
660 |
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73 | } else if (s->last_picture_ptr) { |
661 |
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72 | if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0) |
662 | ✗ | return ret; | |
663 | 72 | ff_print_debug_info(s, s->last_picture_ptr, pict); | |
664 | 72 | ff_mpv_export_qp_table(s, pict,s->last_picture_ptr, FF_MPV_QSCALE_TYPE_MPEG1); | |
665 | } | ||
666 | |||
667 |
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445 | if (s->last_picture_ptr || s->low_delay) { |
668 | 444 | *got_frame = 1; | |
669 | } | ||
670 | |||
671 | // so we can detect if frame_end was not called (find some nicer solution...) | ||
672 | 445 | s->current_picture_ptr = NULL; | |
673 | } | ||
674 | |||
675 | 445 | return avpkt->size; | |
676 | } | ||
677 | |||
678 | const FFCodec ff_rv10_decoder = { | ||
679 | .p.name = "rv10", | ||
680 | CODEC_LONG_NAME("RealVideo 1.0"), | ||
681 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
682 | .p.id = AV_CODEC_ID_RV10, | ||
683 | .priv_data_size = sizeof(RVDecContext), | ||
684 | .init = rv10_decode_init, | ||
685 | .close = rv10_decode_end, | ||
686 | FF_CODEC_DECODE_CB(rv10_decode_frame), | ||
687 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
688 | .p.max_lowres = 3, | ||
689 | .p.pix_fmts = (const enum AVPixelFormat[]) { | ||
690 | AV_PIX_FMT_YUV420P, | ||
691 | AV_PIX_FMT_NONE | ||
692 | }, | ||
693 | }; | ||
694 | |||
695 | const FFCodec ff_rv20_decoder = { | ||
696 | .p.name = "rv20", | ||
697 | CODEC_LONG_NAME("RealVideo 2.0"), | ||
698 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
699 | .p.id = AV_CODEC_ID_RV20, | ||
700 | .priv_data_size = sizeof(RVDecContext), | ||
701 | .init = rv10_decode_init, | ||
702 | .close = rv10_decode_end, | ||
703 | FF_CODEC_DECODE_CB(rv10_decode_frame), | ||
704 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY, | ||
705 | .flush = ff_mpeg_flush, | ||
706 | .p.max_lowres = 3, | ||
707 | .p.pix_fmts = (const enum AVPixelFormat[]) { | ||
708 | AV_PIX_FMT_YUV420P, | ||
709 | AV_PIX_FMT_NONE | ||
710 | }, | ||
711 | }; | ||
712 |