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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 "mpegvideo.h" | ||
42 | #include "mpegvideodec.h" | ||
43 | #include "mpeg4video.h" | ||
44 | #include "mpegvideodata.h" | ||
45 | #include "rv10dec.h" | ||
46 | |||
47 | #define RV_GET_MAJOR_VER(x) ((x) >> 28) | ||
48 | #define RV_GET_MINOR_VER(x) (((x) >> 20) & 0xFF) | ||
49 | #define RV_GET_MICRO_VER(x) (((x) >> 12) & 0xFF) | ||
50 | |||
51 | #define MAX_VLC_ENTRIES 1023 // Note: Does not include the skip entries. | ||
52 | #define DC_VLC_BITS 9 | ||
53 | |||
54 | typedef struct RVDecContext { | ||
55 | MpegEncContext m; | ||
56 | int sub_id; | ||
57 | int orig_width, orig_height; | ||
58 | } RVDecContext; | ||
59 | |||
60 | /* (run, length) encoded value for the symbols table. The actual symbols | ||
61 | * are run..run - length (mod 256). | ||
62 | * The last two entries in the following table apply to luma only. | ||
63 | * The skip values are not included in this list. */ | ||
64 | static const uint8_t rv_sym_run_len[][2] = { | ||
65 | { 0, 0 }, { 1, 0 }, { 255, 0 }, { 3, 1 }, { 254, 1 }, | ||
66 | { 7, 3 }, { 252, 3 }, { 15, 7 }, { 248, 7 }, { 31, 15 }, | ||
67 | { 240, 15 }, { 63, 31 }, { 224, 31 }, { 127, 63 }, { 192, 63 }, | ||
68 | { 255, 127 }, { 128, 127 }, { 127, 255 }, { 128, 255 }, | ||
69 | }; | ||
70 | |||
71 | /* entry[i] of the following tables gives | ||
72 | * the number of VLC codes of length i + 2. */ | ||
73 | static const uint16_t rv_lum_len_count[15] = { | ||
74 | 1, 0, 2, 4, 8, 16, 32, 0, 64, 0, 128, 0, 256, 0, 512, | ||
75 | }; | ||
76 | |||
77 | static const uint16_t rv_chrom_len_count[15] = { | ||
78 | 1, 2, 4, 0, 8, 0, 16, 0, 32, 0, 64, 0, 128, 0, 256, | ||
79 | }; | ||
80 | |||
81 | static VLCElem rv_dc_lum[1472], rv_dc_chrom[992]; | ||
82 | |||
83 | ✗ | int ff_rv_decode_dc(MpegEncContext *s, int n) | |
84 | { | ||
85 | int code; | ||
86 | |||
87 | ✗ | if (n < 4) { | |
88 | ✗ | code = get_vlc2(&s->gb, rv_dc_lum, DC_VLC_BITS, 2); | |
89 | } else { | ||
90 | ✗ | code = get_vlc2(&s->gb, rv_dc_chrom, DC_VLC_BITS, 2); | |
91 | ✗ | if (code < 0) { | |
92 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n"); | |
93 | ✗ | return -1; | |
94 | } | ||
95 | } | ||
96 | ✗ | return code; | |
97 | } | ||
98 | |||
99 | /* read RV 1.0 compatible frame header */ | ||
100 | 150 | static int rv10_decode_picture_header(MpegEncContext *s) | |
101 | { | ||
102 | int mb_count, pb_frame, marker, mb_xy; | ||
103 | |||
104 | 150 | marker = get_bits1(&s->gb); | |
105 | |||
106 |
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150 | if (get_bits1(&s->gb)) |
107 | 135 | s->pict_type = AV_PICTURE_TYPE_P; | |
108 | else | ||
109 | 15 | s->pict_type = AV_PICTURE_TYPE_I; | |
110 | |||
111 |
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150 | if (!marker) |
112 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "marker missing\n"); | |
113 | |||
114 | 150 | pb_frame = get_bits1(&s->gb); | |
115 | |||
116 | ff_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame); | ||
117 | |||
118 |
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150 | if (pb_frame) { |
119 | ✗ | avpriv_request_sample(s->avctx, "PB-frame"); | |
120 | ✗ | return AVERROR_PATCHWELCOME; | |
121 | } | ||
122 | |||
123 | 150 | s->qscale = get_bits(&s->gb, 5); | |
124 |
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150 | if (s->qscale == 0) { |
125 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n"); | |
126 | ✗ | return AVERROR_INVALIDDATA; | |
127 | } | ||
128 | |||
129 |
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150 | if (s->pict_type == AV_PICTURE_TYPE_I) { |
130 |
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15 | if (s->rv10_version == 3) { |
131 | /* specific MPEG like DC coding not used */ | ||
132 | ✗ | s->last_dc[0] = get_bits(&s->gb, 8); | |
133 | ✗ | s->last_dc[1] = get_bits(&s->gb, 8); | |
134 | ✗ | s->last_dc[2] = get_bits(&s->gb, 8); | |
135 | ff_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0], | ||
136 | s->last_dc[1], s->last_dc[2]); | ||
137 | } | ||
138 | } | ||
139 | /* if multiple packets per frame are sent, the position at which | ||
140 | * to display the macroblocks is coded here */ | ||
141 | |||
142 | 150 | mb_xy = s->mb_x + s->mb_y * s->mb_width; | |
143 |
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150 | if (show_bits(&s->gb, 12) == 0 || (mb_xy && mb_xy < s->mb_num)) { |
144 | 150 | s->mb_x = get_bits(&s->gb, 6); /* mb_x */ | |
145 | 150 | s->mb_y = get_bits(&s->gb, 6); /* mb_y */ | |
146 | 150 | mb_count = get_bits(&s->gb, 12); | |
147 | } else { | ||
148 | ✗ | s->mb_x = 0; | |
149 | ✗ | s->mb_y = 0; | |
150 | ✗ | mb_count = s->mb_width * s->mb_height; | |
151 | } | ||
152 | 150 | skip_bits(&s->gb, 3); /* ignored */ | |
153 | |||
154 | 150 | return mb_count; | |
155 | } | ||
156 | |||
157 | 742 | static int rv20_decode_picture_header(RVDecContext *rv, int whole_size) | |
158 | { | ||
159 | static const enum AVPictureType pict_types[] = | ||
160 | { AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_I /* hmm ... */, | ||
161 | AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B }; | ||
162 | 742 | MpegEncContext *s = &rv->m; | |
163 | int seq, mb_pos, ret; | ||
164 | int rpr_max; | ||
165 | |||
166 | 742 | s->pict_type = pict_types[get_bits(&s->gb, 2)]; | |
167 | |||
168 |
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742 | if (s->low_delay && s->pict_type == AV_PICTURE_TYPE_B) { |
169 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "low delay B\n"); | |
170 | ✗ | return -1; | |
171 | } | ||
172 |
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742 | if (!s->last_pic.ptr && s->pict_type == AV_PICTURE_TYPE_B) { |
173 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "early B-frame\n"); | |
174 | ✗ | return AVERROR_INVALIDDATA; | |
175 | } | ||
176 | |||
177 |
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742 | if (get_bits1(&s->gb)) { |
178 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n"); | |
179 | ✗ | return AVERROR_INVALIDDATA; | |
180 | } | ||
181 | |||
182 | 742 | s->qscale = get_bits(&s->gb, 5); | |
183 |
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742 | if (s->qscale == 0) { |
184 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n"); | |
185 | ✗ | return AVERROR_INVALIDDATA; | |
186 | } | ||
187 | |||
188 |
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742 | if (RV_GET_MINOR_VER(rv->sub_id) >= 2) |
189 |
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592 | s->loop_filter = get_bits1(&s->gb) && !s->avctx->lowres; |
190 | |||
191 |
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742 | if (RV_GET_MINOR_VER(rv->sub_id) <= 1) |
192 | 150 | seq = get_bits(&s->gb, 8) << 7; | |
193 | else | ||
194 | 592 | seq = get_bits(&s->gb, 13) << 2; | |
195 | |||
196 | 742 | rpr_max = s->avctx->extradata[1] & 7; | |
197 |
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742 | if (rpr_max) { |
198 | int f, new_w, new_h; | ||
199 | 592 | int rpr_bits = av_log2(rpr_max) + 1; | |
200 | |||
201 | 592 | f = get_bits(&s->gb, rpr_bits); | |
202 | |||
203 |
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592 | if (f) { |
204 | ✗ | if (s->avctx->extradata_size < 8 + 2 * f) { | |
205 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Extradata too small.\n"); | |
206 | ✗ | return AVERROR_INVALIDDATA; | |
207 | } | ||
208 | |||
209 | ✗ | new_w = 4 * s->avctx->extradata[6 + 2 * f]; | |
210 | ✗ | new_h = 4 * s->avctx->extradata[7 + 2 * f]; | |
211 | } else { | ||
212 | 592 | new_w = rv->orig_width; | |
213 | 592 | new_h = rv->orig_height; | |
214 | } | ||
215 |
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592 | if (new_w != s->width || new_h != s->height || !s->context_initialized) { |
216 | ✗ | AVRational old_aspect = s->avctx->sample_aspect_ratio; | |
217 | ✗ | av_log(s->avctx, AV_LOG_DEBUG, | |
218 | "attempting to change resolution to %dx%d\n", new_w, new_h); | ||
219 | ✗ | if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0) | |
220 | ✗ | return AVERROR_INVALIDDATA; | |
221 | |||
222 | ✗ | if (whole_size < (new_w + 15)/16 * ((new_h + 15)/16) / 8) | |
223 | ✗ | return AVERROR_INVALIDDATA; | |
224 | |||
225 | ✗ | ff_mpv_common_end(s); | |
226 | |||
227 | // attempt to keep aspect during typical resolution switches | ||
228 | ✗ | if (!old_aspect.num) | |
229 | ✗ | old_aspect = (AVRational){1, 1}; | |
230 | ✗ | if (2 * (int64_t)new_w * s->height == (int64_t)new_h * s->width) | |
231 | ✗ | s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){2, 1}); | |
232 | ✗ | if ((int64_t)new_w * s->height == 2 * (int64_t)new_h * s->width) | |
233 | ✗ | s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){1, 2}); | |
234 | |||
235 | ✗ | ret = ff_set_dimensions(s->avctx, new_w, new_h); | |
236 | ✗ | if (ret < 0) | |
237 | ✗ | return ret; | |
238 | |||
239 | ✗ | s->width = new_w; | |
240 | ✗ | s->height = new_h; | |
241 | ✗ | if ((ret = ff_mpv_common_init(s)) < 0) | |
242 | ✗ | return ret; | |
243 | } | ||
244 | |||
245 |
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592 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) { |
246 | ✗ | av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d/%d\n", f, rpr_bits, rpr_max); | |
247 | } | ||
248 | } | ||
249 |
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742 | if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0) |
250 | ✗ | return AVERROR_INVALIDDATA; | |
251 | |||
252 | 742 | mb_pos = ff_h263_decode_mba(s); | |
253 | |||
254 | 742 | seq |= s->time & ~0x7FFF; | |
255 |
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742 | if (seq - s->time > 0x4000) |
256 | ✗ | seq -= 0x8000; | |
257 |
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742 | if (seq - s->time < -0x4000) |
258 | ✗ | seq += 0x8000; | |
259 | |||
260 |
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742 | if (seq != s->time) { |
261 |
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292 | if (s->pict_type != AV_PICTURE_TYPE_B) { |
262 | 220 | s->time = seq; | |
263 | 220 | s->pp_time = s->time - s->last_non_b_time; | |
264 | 220 | s->last_non_b_time = s->time; | |
265 | } else { | ||
266 | 72 | s->time = seq; | |
267 | 72 | s->pb_time = s->pp_time - (s->last_non_b_time - s->time); | |
268 | } | ||
269 | } | ||
270 |
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742 | if (s->pict_type == AV_PICTURE_TYPE_B) { |
271 |
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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) { |
272 | ✗ | av_log(s->avctx, AV_LOG_DEBUG, | |
273 | "messed up order, possible from seeking? skipping current B-frame\n"); | ||
274 | #define ERROR_SKIP_FRAME -123 | ||
275 | ✗ | return ERROR_SKIP_FRAME; | |
276 | } | ||
277 | 181 | ff_mpeg4_init_direct_mv(s); | |
278 | } | ||
279 | |||
280 | 742 | s->no_rounding = get_bits1(&s->gb); | |
281 | |||
282 |
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742 | if (RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B) |
283 | // binary decoder reads 3+2 bits here but they don't seem to be used | ||
284 | ✗ | skip_bits(&s->gb, 5); | |
285 | |||
286 | 742 | s->h263_aic = s->pict_type == AV_PICTURE_TYPE_I; | |
287 |
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742 | if (s->h263_aic) { |
288 | 67 | s->y_dc_scale_table = | |
289 | 67 | s->c_dc_scale_table = ff_aic_dc_scale_table; | |
290 | } else { | ||
291 | 675 | s->y_dc_scale_table = | |
292 | 675 | s->c_dc_scale_table = ff_mpeg1_dc_scale_table; | |
293 | } | ||
294 |
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742 | if (!s->avctx->lowres) |
295 | 150 | s->loop_filter = 1; | |
296 | |||
297 |
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742 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) { |
298 | ✗ | av_log(s->avctx, AV_LOG_INFO, | |
299 | "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n", | ||
300 | seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, | ||
301 | s->no_rounding); | ||
302 | } | ||
303 | |||
304 |
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742 | av_assert0(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay); |
305 | |||
306 | 742 | return s->mb_width * s->mb_height - mb_pos; | |
307 | } | ||
308 | |||
309 | 26 | static av_cold void rv10_build_vlc(VLCElem vlc[], int table_size, | |
310 | const uint16_t len_count[15], | ||
311 | const uint8_t sym_rl[][2], int sym_rl_elems) | ||
312 | { | ||
313 | uint16_t syms[MAX_VLC_ENTRIES]; | ||
314 | uint8_t lens[MAX_VLC_ENTRIES]; | ||
315 | 26 | unsigned nb_syms = 0, nb_lens = 0; | |
316 | |||
317 |
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494 | for (unsigned i = 0; i < sym_rl_elems; i++) { |
318 | 468 | unsigned cur_sym = sym_rl[i][0]; | |
319 |
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20410 | for (unsigned tmp = nb_syms + sym_rl[i][1]; nb_syms <= tmp; nb_syms++) |
320 | 19942 | syms[nb_syms] = 0xFF & cur_sym--; | |
321 | } | ||
322 | |||
323 |
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416 | for (unsigned i = 0; i < 15; i++) |
324 |
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20332 | for (unsigned tmp = nb_lens + len_count[i]; nb_lens < tmp; nb_lens++) |
325 | 19942 | lens[nb_lens] = i + 2; | |
326 | av_assert1(nb_lens == nb_syms); | ||
327 | 26 | ff_vlc_init_table_from_lengths(vlc, table_size, DC_VLC_BITS, nb_lens, | |
328 | lens, 1, syms, 2, 2, 0, 0); | ||
329 | 26 | } | |
330 | |||
331 | 13 | static av_cold void rv10_init_static(void) | |
332 | { | ||
333 | 13 | rv10_build_vlc(rv_dc_lum, FF_ARRAY_ELEMS(rv_dc_lum), rv_lum_len_count, | |
334 | rv_sym_run_len, FF_ARRAY_ELEMS(rv_sym_run_len)); | ||
335 |
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65 | for (int i = 0; i < 1 << (DC_VLC_BITS - 7 /* Length of skip prefix */); i++) { |
336 | /* All codes beginning with 0x7F have the same length and value. | ||
337 | * Modifying the table directly saves us the useless subtables. */ | ||
338 | 52 | rv_dc_lum[(0x7F << (DC_VLC_BITS - 7)) + i].sym = 255; | |
339 | 52 | rv_dc_lum[(0x7F << (DC_VLC_BITS - 7)) + i].len = 18; | |
340 | } | ||
341 | 13 | rv10_build_vlc(rv_dc_chrom, FF_ARRAY_ELEMS(rv_dc_chrom), rv_chrom_len_count, | |
342 | rv_sym_run_len, FF_ARRAY_ELEMS(rv_sym_run_len) - 2); | ||
343 |
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26 | for (int i = 0; i < 1 << (DC_VLC_BITS - 9 /* Length of skip prefix */); i++) { |
344 | /* Same as above. */ | ||
345 | 13 | rv_dc_chrom[(0x1FE << (DC_VLC_BITS - 9)) + i].sym = 255; | |
346 | 13 | rv_dc_chrom[(0x1FE << (DC_VLC_BITS - 9)) + i].len = 18; | |
347 | } | ||
348 | 13 | } | |
349 | |||
350 | 20 | static av_cold int rv10_decode_init(AVCodecContext *avctx) | |
351 | { | ||
352 | static AVOnce init_static_once = AV_ONCE_INIT; | ||
353 | 20 | RVDecContext *rv = avctx->priv_data; | |
354 | 20 | MpegEncContext *s = &rv->m; | |
355 | int major_ver, minor_ver, micro_ver, ret; | ||
356 | |||
357 |
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20 | if (avctx->extradata_size < 8) { |
358 | ✗ | av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n"); | |
359 | ✗ | return AVERROR_INVALIDDATA; | |
360 | } | ||
361 |
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20 | if ((ret = av_image_check_size(avctx->coded_width, |
362 | 20 | avctx->coded_height, 0, avctx)) < 0) | |
363 | ✗ | return ret; | |
364 | |||
365 | 20 | ret = ff_h263_decode_init(avctx); | |
366 |
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20 | if (ret < 0) |
367 | ✗ | return ret; | |
368 | |||
369 | 20 | rv->orig_width = avctx->coded_width; | |
370 | 20 | rv->orig_height = avctx->coded_height; | |
371 | |||
372 | 20 | s->h263_long_vectors = avctx->extradata[3] & 1; | |
373 | 20 | rv->sub_id = AV_RB32A(avctx->extradata + 4); | |
374 |
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20 | if (avctx->codec_id == AV_CODEC_ID_RV20) { |
375 | 11 | s->modified_quant = 1; | |
376 | 11 | s->chroma_qscale_table = ff_h263_chroma_qscale_table; | |
377 | } | ||
378 | |||
379 | 20 | major_ver = RV_GET_MAJOR_VER(rv->sub_id); | |
380 | 20 | minor_ver = RV_GET_MINOR_VER(rv->sub_id); | |
381 | 20 | micro_ver = RV_GET_MICRO_VER(rv->sub_id); | |
382 | |||
383 |
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20 | switch (major_ver) { |
384 | 9 | case 1: | |
385 |
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9 | s->rv10_version = micro_ver ? 3 : 1; |
386 | 9 | s->obmc = micro_ver == 2; | |
387 | 9 | break; | |
388 | 11 | case 2: | |
389 |
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11 | if (minor_ver >= 2) { |
390 | 3 | s->low_delay = 0; | |
391 | 3 | avctx->has_b_frames = 1; | |
392 | } | ||
393 | 11 | break; | |
394 | ✗ | default: | |
395 | ✗ | av_log(avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id); | |
396 | ✗ | avpriv_request_sample(avctx, "RV1/2 version"); | |
397 | ✗ | return AVERROR_PATCHWELCOME; | |
398 | } | ||
399 | |||
400 |
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20 | if (avctx->debug & FF_DEBUG_PICT_INFO) { |
401 | ✗ | av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%"PRIX32"\n", rv->sub_id, | |
402 | ✗ | AV_RL32A(avctx->extradata)); | |
403 | } | ||
404 | |||
405 | /* init static VLCs */ | ||
406 | 20 | ff_thread_once(&init_static_once, rv10_init_static); | |
407 | |||
408 | 20 | return 0; | |
409 | } | ||
410 | |||
411 | 892 | static int rv10_decode_packet(AVCodecContext *avctx, const uint8_t *buf, | |
412 | int buf_size, int buf_size2, int whole_size) | ||
413 | { | ||
414 | 892 | RVDecContext *rv = avctx->priv_data; | |
415 | 892 | MpegEncContext *s = &rv->m; | |
416 | int mb_count, mb_pos, left, start_mb_x, active_bits_size, ret; | ||
417 | |||
418 | 892 | active_bits_size = buf_size * 8; | |
419 | 892 | init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8); | |
420 |
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892 | if (s->codec_id == AV_CODEC_ID_RV10) |
421 | 150 | mb_count = rv10_decode_picture_header(s); | |
422 | else | ||
423 | 742 | mb_count = rv20_decode_picture_header(rv, whole_size); | |
424 |
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892 | if (mb_count < 0) { |
425 | ✗ | if (mb_count != ERROR_SKIP_FRAME) | |
426 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n"); | |
427 | ✗ | return AVERROR_INVALIDDATA; | |
428 | } | ||
429 | |||
430 |
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892 | if (s->mb_x >= s->mb_width || |
431 |
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892 | s->mb_y >= s->mb_height) { |
432 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y); | |
433 | ✗ | return AVERROR_INVALIDDATA; | |
434 | } | ||
435 | 892 | mb_pos = s->mb_y * s->mb_width + s->mb_x; | |
436 | 892 | left = s->mb_width * s->mb_height - mb_pos; | |
437 |
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892 | if (mb_count > left) { |
438 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n"); | |
439 | ✗ | return AVERROR_INVALIDDATA; | |
440 | } | ||
441 | |||
442 |
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892 | if (whole_size < s->mb_width * s->mb_height / 8) |
443 | ✗ | return AVERROR_INVALIDDATA; | |
444 | |||
445 |
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892 | if ((s->mb_x == 0 && s->mb_y == 0) || !s->cur_pic.ptr) { |
446 | // FIXME write parser so we always have complete frames? | ||
447 |
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445 | if (s->cur_pic.ptr) { |
448 | ✗ | ff_er_frame_end(&s->er, NULL); | |
449 | ✗ | ff_mpv_frame_end(s); | |
450 | ✗ | s->mb_x = s->mb_y = s->resync_mb_x = s->resync_mb_y = 0; | |
451 | } | ||
452 |
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445 | if ((ret = ff_mpv_frame_start(s, avctx)) < 0) |
453 | ✗ | return ret; | |
454 | 445 | ff_mpeg_er_frame_start(s); | |
455 | } else { | ||
456 |
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447 | if (s->cur_pic.ptr->f->pict_type != s->pict_type) { |
457 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n"); | |
458 | ✗ | return AVERROR_INVALIDDATA; | |
459 | } | ||
460 | } | ||
461 | |||
462 | |||
463 | ff_dlog(avctx, "qscale=%d\n", s->qscale); | ||
464 | |||
465 | /* default quantization values */ | ||
466 |
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892 | if (s->codec_id == AV_CODEC_ID_RV10) { |
467 |
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150 | if (s->mb_y == 0) |
468 | 150 | s->first_slice_line = 1; | |
469 | } else { | ||
470 | 742 | s->first_slice_line = 1; | |
471 | 742 | s->resync_mb_x = s->mb_x; | |
472 | } | ||
473 | 892 | start_mb_x = s->mb_x; | |
474 | 892 | s->resync_mb_y = s->mb_y; | |
475 | |||
476 | 892 | ff_set_qscale(s, s->qscale); | |
477 | |||
478 | 892 | s->rv10_first_dc_coded[0] = 0; | |
479 | 892 | s->rv10_first_dc_coded[1] = 0; | |
480 | 892 | s->rv10_first_dc_coded[2] = 0; | |
481 | 892 | ff_init_block_index(s); | |
482 | |||
483 | /* decode each macroblock */ | ||
484 |
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162300 | for (s->mb_num_left = mb_count; s->mb_num_left > 0; s->mb_num_left--) { |
485 | int ret; | ||
486 | 162300 | ff_update_block_index(s, 8, s->avctx->lowres, 1); | |
487 | ff_tlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y); | ||
488 | |||
489 | 162300 | s->mv_dir = MV_DIR_FORWARD; | |
490 | 162300 | s->mv_type = MV_TYPE_16X16; | |
491 | 162300 | ret = ff_h263_decode_mb(s, s->block); | |
492 | |||
493 | // Repeat the slice end check from ff_h263_decode_mb with our active | ||
494 | // bitstream size | ||
495 |
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162300 | if (ret != SLICE_ERROR && active_bits_size >= get_bits_count(&s->gb)) { |
496 | 162300 | int v = show_bits(&s->gb, 16); | |
497 | |||
498 |
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162300 | if (get_bits_count(&s->gb) + 16 > active_bits_size) |
499 | 1341 | v >>= get_bits_count(&s->gb) + 16 - active_bits_size; | |
500 | |||
501 |
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162300 | if (!v) |
502 | 892 | ret = SLICE_END; | |
503 | } | ||
504 |
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162300 | if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) && |
505 | ✗ | 8 * buf_size2 >= get_bits_count(&s->gb)) { | |
506 | ✗ | active_bits_size = buf_size2 * 8; | |
507 | ✗ | av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n", | |
508 | 8 * buf_size, active_bits_size); | ||
509 | ✗ | ret = SLICE_OK; | |
510 | } | ||
511 | |||
512 |
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162300 | if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) { |
513 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, | |
514 | s->mb_y); | ||
515 | ✗ | return AVERROR_INVALIDDATA; | |
516 | } | ||
517 |
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162300 | if (s->pict_type != AV_PICTURE_TYPE_B) |
518 | 140700 | ff_h263_update_motion_val(s); | |
519 | 162300 | ff_mpv_reconstruct_mb(s, s->block); | |
520 |
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162300 | if (s->loop_filter) |
521 | 59400 | ff_h263_loop_filter(s); | |
522 | |||
523 |
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162300 | if (++s->mb_x == s->mb_width) { |
524 | 7575 | s->mb_x = 0; | |
525 | 7575 | s->mb_y++; | |
526 | 7575 | ff_init_block_index(s); | |
527 | } | ||
528 |
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162300 | if (s->mb_x == s->resync_mb_x) |
529 | 7297 | s->first_slice_line = 0; | |
530 |
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162300 | if (ret == SLICE_END) |
531 | 892 | break; | |
532 | } | ||
533 | |||
534 | 892 | ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x - 1, s->mb_y, | |
535 | ER_MB_END); | ||
536 | |||
537 | 892 | return active_bits_size; | |
538 | } | ||
539 | |||
540 | 1667 | static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n) | |
541 | { | ||
542 | 1667 | return AV_RL32(buf + n * 8); | |
543 | } | ||
544 | |||
545 | 449 | static int rv10_decode_frame(AVCodecContext *avctx, AVFrame *pict, | |
546 | int *got_frame, AVPacket *avpkt) | ||
547 | { | ||
548 | 449 | const uint8_t *buf = avpkt->data; | |
549 | 449 | int buf_size = avpkt->size; | |
550 | 449 | MpegEncContext *s = avctx->priv_data; | |
551 | int i, ret; | ||
552 | int slice_count; | ||
553 | 449 | const uint8_t *slices_hdr = NULL; | |
554 | |||
555 | ff_dlog(avctx, "*****frame %"PRId64" size=%d\n", avctx->frame_num, buf_size); | ||
556 | |||
557 | /* no supplementary picture */ | ||
558 |
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449 | if (buf_size == 0) { |
559 | 4 | return 0; | |
560 | } | ||
561 | |||
562 | 445 | slice_count = (*buf++) + 1; | |
563 | 445 | buf_size--; | |
564 | |||
565 |
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445 | if (!slice_count || buf_size <= 8 * slice_count) { |
566 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n", | |
567 | slice_count); | ||
568 | ✗ | return AVERROR_INVALIDDATA; | |
569 | } | ||
570 | |||
571 | 445 | slices_hdr = buf + 4; | |
572 | 445 | buf += 8 * slice_count; | |
573 | 445 | buf_size -= 8 * slice_count; | |
574 | |||
575 |
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1337 | for (i = 0; i < slice_count; i++) { |
576 | 892 | unsigned offset = get_slice_offset(avctx, slices_hdr, i); | |
577 | int size, size2; | ||
578 | |||
579 |
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892 | if (offset >= buf_size) |
580 | ✗ | return AVERROR_INVALIDDATA; | |
581 | |||
582 |
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892 | if (i + 1 == slice_count) |
583 | 445 | size = buf_size - offset; | |
584 | else | ||
585 | 447 | size = get_slice_offset(avctx, slices_hdr, i + 1) - offset; | |
586 | |||
587 |
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892 | if (i + 2 >= slice_count) |
588 | 564 | size2 = buf_size - offset; | |
589 | else | ||
590 | 328 | size2 = get_slice_offset(avctx, slices_hdr, i + 2) - offset; | |
591 | |||
592 |
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892 | if (size <= 0 || size2 <= 0 || |
593 |
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892 | offset + FFMAX(size, size2) > buf_size) |
594 | ✗ | return AVERROR_INVALIDDATA; | |
595 | |||
596 |
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892 | if ((ret = rv10_decode_packet(avctx, buf + offset, size, size2, buf_size)) < 0) |
597 | ✗ | return ret; | |
598 | |||
599 |
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892 | if (ret > 8 * size) |
600 | ✗ | i++; | |
601 | } | ||
602 | |||
603 |
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445 | if (s->cur_pic.ptr && s->mb_y >= s->mb_height) { |
604 | 445 | ff_er_frame_end(&s->er, NULL); | |
605 | 445 | ff_mpv_frame_end(s); | |
606 | |||
607 |
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445 | if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) { |
608 |
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372 | if ((ret = av_frame_ref(pict, s->cur_pic.ptr->f)) < 0) |
609 | ✗ | return ret; | |
610 | 372 | ff_print_debug_info(s, s->cur_pic.ptr, pict); | |
611 | 372 | ff_mpv_export_qp_table(s, pict, s->cur_pic.ptr, FF_MPV_QSCALE_TYPE_MPEG1); | |
612 |
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73 | } else if (s->last_pic.ptr) { |
613 |
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72 | if ((ret = av_frame_ref(pict, s->last_pic.ptr->f)) < 0) |
614 | ✗ | return ret; | |
615 | 72 | ff_print_debug_info(s, s->last_pic.ptr, pict); | |
616 | 72 | ff_mpv_export_qp_table(s, pict,s->last_pic.ptr, FF_MPV_QSCALE_TYPE_MPEG1); | |
617 | } | ||
618 | |||
619 |
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445 | if (s->last_pic.ptr || s->low_delay) { |
620 | 444 | *got_frame = 1; | |
621 | } | ||
622 | |||
623 | // so we can detect if frame_end was not called (find some nicer solution...) | ||
624 | 445 | ff_mpv_unref_picture(&s->cur_pic); | |
625 | } | ||
626 | |||
627 | 445 | return avpkt->size; | |
628 | } | ||
629 | |||
630 | const FFCodec ff_rv10_decoder = { | ||
631 | .p.name = "rv10", | ||
632 | CODEC_LONG_NAME("RealVideo 1.0"), | ||
633 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
634 | .p.id = AV_CODEC_ID_RV10, | ||
635 | .priv_data_size = sizeof(RVDecContext), | ||
636 | .init = rv10_decode_init, | ||
637 | FF_CODEC_DECODE_CB(rv10_decode_frame), | ||
638 | .close = ff_mpv_decode_close, | ||
639 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
640 | .p.max_lowres = 3, | ||
641 | .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, | ||
642 | }; | ||
643 | |||
644 | const FFCodec ff_rv20_decoder = { | ||
645 | .p.name = "rv20", | ||
646 | CODEC_LONG_NAME("RealVideo 2.0"), | ||
647 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
648 | .p.id = AV_CODEC_ID_RV20, | ||
649 | .priv_data_size = sizeof(RVDecContext), | ||
650 | .init = rv10_decode_init, | ||
651 | FF_CODEC_DECODE_CB(rv10_decode_frame), | ||
652 | .close = ff_mpv_decode_close, | ||
653 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY, | ||
654 | .flush = ff_mpeg_flush, | ||
655 | .p.max_lowres = 3, | ||
656 | .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, | ||
657 | }; | ||
658 |