FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/mpeg12dec.c
Date: 2025-06-01 09:29:47
Exec Total Coverage
Lines: 1160 1603 72.4%
Functions: 30 33 90.9%
Branches: 666 1117 59.6%
Line Branch Exec Source
1 /*
2 * MPEG-1/2 decoder
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2002-2013 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 /**
24 * @file
25 * MPEG-1/2 decoder
26 */
27
28 #include "config_components.h"
29
30 #define UNCHECKED_BITSTREAM_READER 1
31 #include <inttypes.h>
32 #include <stdatomic.h>
33
34 #include "libavutil/attributes.h"
35 #include "libavutil/emms.h"
36 #include "libavutil/imgutils.h"
37 #include "libavutil/internal.h"
38 #include "libavutil/mem_internal.h"
39 #include "libavutil/reverse.h"
40 #include "libavutil/stereo3d.h"
41 #include "libavutil/timecode.h"
42
43 #include "avcodec.h"
44 #include "codec_internal.h"
45 #include "decode.h"
46 #include "error_resilience.h"
47 #include "hwaccel_internal.h"
48 #include "hwconfig.h"
49 #include "idctdsp.h"
50 #include "mpeg_er.h"
51 #include "mpeg12.h"
52 #include "mpeg12codecs.h"
53 #include "mpeg12data.h"
54 #include "mpeg12dec.h"
55 #include "mpegutils.h"
56 #include "mpegvideo.h"
57 #include "mpegvideodata.h"
58 #include "mpegvideodec.h"
59 #include "profiles.h"
60 #include "startcode.h"
61
62 #define A53_MAX_CC_COUNT 2000
63
64 enum Mpeg2ClosedCaptionsFormat {
65 CC_FORMAT_AUTO,
66 CC_FORMAT_A53_PART4,
67 CC_FORMAT_SCTE20,
68 CC_FORMAT_DVD,
69 CC_FORMAT_DISH
70 };
71
72 typedef struct Mpeg1Context {
73 MpegEncContext mpeg_enc_ctx;
74 AVPanScan pan_scan; /* some temporary storage for the panscan */
75 enum AVStereo3DType stereo3d_type;
76 int has_stereo3d;
77 AVBufferRef *a53_buf_ref;
78 enum Mpeg2ClosedCaptionsFormat cc_format;
79 uint8_t afd;
80 int has_afd;
81 int slice_count;
82 unsigned aspect_ratio_info;
83 int save_progressive_seq, save_chroma_format;
84 AVRational frame_rate_ext; /* MPEG-2 specific framerate modificator */
85 unsigned frame_rate_index;
86 int sync; /* Did we reach a sync point like a GOP/SEQ/KEYFrame? */
87 int closed_gop;
88 int tmpgexs;
89 int first_slice;
90 int extradata_decoded;
91 int vbv_delay;
92 int64_t bit_rate;
93 int64_t timecode_frame_start; /*< GOP timecode frame start number, in non drop frame format */
94 } Mpeg1Context;
95
96 /* as H.263, but only 17 codes */
97 5396998 static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
98 {
99 int code, sign, val, shift;
100
101 5396998 code = get_vlc2(&s->gb, ff_mv_vlc, MV_VLC_BITS, 2);
102
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 5396998 if (code == 0)
103 2006823 return pred;
104
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 3390175 if (code < 0)
105 ✗ return 0xffff;
106
107 3390175 sign = get_bits1(&s->gb);
108 3390175 shift = fcode - 1;
109 3390175 val = code;
110
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 3390175 if (shift) {
111 3050515 val = (val - 1) << shift;
112 3050515 val |= get_bits(&s->gb, shift);
113 3050515 val++;
114 }
115
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 3390175 if (sign)
116 1752791 val = -val;
117 3390175 val += pred;
118
119 /* modulo decoding */
120 3390175 return sign_extend(val, 5 + shift);
121 }
122
123 #define MAX_INDEX (64 - 1)
124 #define check_scantable_index(ctx, x) \
125 do { \
126 if ((x) > MAX_INDEX) { \
127 av_log(ctx->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", \
128 ctx->mb_x, ctx->mb_y); \
129 return AVERROR_INVALIDDATA; \
130 } \
131 } while (0)
132
133 403182 static inline int mpeg1_decode_block_inter(MpegEncContext *s,
134 int16_t *block, int n)
135 {
136 int level, i, j, run;
137 403182 const uint8_t *const scantable = s->intra_scantable.permutated;
138 403182 const uint16_t *quant_matrix = s->inter_matrix;
139 403182 const int qscale = s->qscale;
140
141 {
142 403182 OPEN_READER(re, &s->gb);
143 403182 i = -1;
144 // special case for first coefficient, no need to add second VLC table
145 403182 UPDATE_CACHE(re, &s->gb);
146
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 403182 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
147 101925 level = (3 * qscale * quant_matrix[0]) >> 5;
148 101925 level = (level - 1) | 1;
149
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 101925 if (GET_CACHE(re, &s->gb) & 0x40000000)
150 57008 level = -level;
151 101925 block[0] = level;
152 101925 i++;
153 101925 SKIP_BITS(re, &s->gb, 2);
154
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 101925 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
155 34409 goto end;
156 }
157 /* now quantify & encode AC coefficients */
158 for (;;) {
159
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 2920654 GET_RL_VLC(level, run, re, &s->gb, ff_mpeg1_rl_vlc,
160 TEX_VLC_BITS, 2, 0);
161
162
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 2920654 if (level != 0) {
163 2841520 i += run;
164
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 2841520 if (i > MAX_INDEX)
165 ✗ break;
166 2841520 j = scantable[i];
167 2841520 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
168 2841520 level = (level - 1) | 1;
169 2841520 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
170 2841520 SHOW_SBITS(re, &s->gb, 1);
171 2841520 SKIP_BITS(re, &s->gb, 1);
172 } else {
173 /* escape */
174 79134 run = SHOW_UBITS(re, &s->gb, 6) + 1;
175 79134 LAST_SKIP_BITS(re, &s->gb, 6);
176 79134 UPDATE_CACHE(re, &s->gb);
177 79134 level = SHOW_SBITS(re, &s->gb, 8);
178 79134 SKIP_BITS(re, &s->gb, 8);
179
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 79134 if (level == -128) {
180 ✗ level = SHOW_UBITS(re, &s->gb, 8) - 256;
181 ✗ SKIP_BITS(re, &s->gb, 8);
182
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 79134 } else if (level == 0) {
183 ✗ level = SHOW_UBITS(re, &s->gb, 8);
184 ✗ SKIP_BITS(re, &s->gb, 8);
185 }
186 79134 i += run;
187
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 79134 if (i > MAX_INDEX)
188 ✗ break;
189 79134 j = scantable[i];
190
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 79134 if (level < 0) {
191 38931 level = -level;
192 38931 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
193 38931 level = (level - 1) | 1;
194 38931 level = -level;
195 } else {
196 40203 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
197 40203 level = (level - 1) | 1;
198 }
199 }
200
201 2920654 block[j] = level;
202
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 2920654 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
203 368773 break;
204 2551881 UPDATE_CACHE(re, &s->gb);
205 }
206 403182 end:
207 403182 LAST_SKIP_BITS(re, &s->gb, 2);
208 403182 CLOSE_READER(re, &s->gb);
209 }
210
211
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 403182 check_scantable_index(s, i);
212
213 403182 s->block_last_index[n] = i;
214 403182 return 0;
215 }
216
217 5126690 static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
218 int16_t *block, int n)
219 {
220 int level, i, j, run;
221 5126690 const uint8_t *const scantable = s->intra_scantable.permutated;
222 const uint16_t *quant_matrix;
223 5126690 const int qscale = s->qscale;
224 int mismatch;
225
226 5126690 mismatch = 1;
227
228 {
229 5126690 OPEN_READER(re, &s->gb);
230 5126690 i = -1;
231
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 5126690 if (n < 4)
232 3837303 quant_matrix = s->inter_matrix;
233 else
234 1289387 quant_matrix = s->chroma_inter_matrix;
235
236 // Special case for first coefficient, no need to add second VLC table.
237 5126690 UPDATE_CACHE(re, &s->gb);
238
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 5126690 if (((int32_t) GET_CACHE(re, &s->gb)) < 0) {
239 1874914 level = (3 * qscale * quant_matrix[0]) >> 5;
240
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 1874914 if (GET_CACHE(re, &s->gb) & 0x40000000)
241 1185020 level = -level;
242 1874914 block[0] = level;
243 1874914 mismatch ^= level;
244 1874914 i++;
245 1874914 SKIP_BITS(re, &s->gb, 2);
246
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 1874914 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
247 892333 goto end;
248 }
249
250 /* now quantify & encode AC coefficients */
251 for (;;) {
252
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 18275325 GET_RL_VLC(level, run, re, &s->gb, ff_mpeg1_rl_vlc,
253 TEX_VLC_BITS, 2, 0);
254
255
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 18275325 if (level != 0) {
256 18003567 i += run;
257
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 18003567 if (i > MAX_INDEX)
258 ✗ break;
259 18003567 j = scantable[i];
260 18003567 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
261 18003567 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
262 18003567 SHOW_SBITS(re, &s->gb, 1);
263 18003567 SKIP_BITS(re, &s->gb, 1);
264 } else {
265 /* escape */
266 271758 run = SHOW_UBITS(re, &s->gb, 6) + 1;
267 271758 LAST_SKIP_BITS(re, &s->gb, 6);
268 271758 UPDATE_CACHE(re, &s->gb);
269 271758 level = SHOW_SBITS(re, &s->gb, 12);
270 271758 SKIP_BITS(re, &s->gb, 12);
271
272 271758 i += run;
273
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 271758 if (i > MAX_INDEX)
274 ✗ break;
275 271758 j = scantable[i];
276
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 271758 if (level < 0) {
277 131782 level = ((-level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
278 131782 level = -level;
279 } else {
280 139976 level = ((level * 2 + 1) * qscale * quant_matrix[j]) >> 5;
281 }
282 }
283
284 18275325 mismatch ^= level;
285 18275325 block[j] = level;
286
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 18275325 if (((int32_t) GET_CACHE(re, &s->gb)) <= (int32_t) 0xBFFFFFFF)
287 4234357 break;
288 14040968 UPDATE_CACHE(re, &s->gb);
289 }
290 5126690 end:
291 5126690 LAST_SKIP_BITS(re, &s->gb, 2);
292 5126690 CLOSE_READER(re, &s->gb);
293 }
294 5126690 block[63] ^= (mismatch & 1);
295
296
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 5126690 check_scantable_index(s, i);
297
298 5126690 s->block_last_index[n] = i;
299 5126690 return 0;
300 }
301
302 1918190 static inline int mpeg2_decode_block_intra(MpegEncContext *s,
303 int16_t *block, int n)
304 {
305 int level, dc, diff, i, j, run;
306 int component;
307 const RL_VLC_ELEM *rl_vlc;
308 1918190 const uint8_t *const scantable = s->intra_scantable.permutated;
309 const uint16_t *quant_matrix;
310 1918190 const int qscale = s->qscale;
311 int mismatch;
312
313 /* DC coefficient */
314
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 1918190 if (n < 4) {
315 1206588 quant_matrix = s->intra_matrix;
316 1206588 component = 0;
317 } else {
318 711602 quant_matrix = s->chroma_intra_matrix;
319 711602 component = (n & 1) + 1;
320 }
321 1918190 diff = decode_dc(&s->gb, component);
322 1918190 dc = s->last_dc[component];
323 1918190 dc += diff;
324 1918190 s->last_dc[component] = dc;
325 1918190 block[0] = dc * (1 << (3 - s->intra_dc_precision));
326 ff_tlog(s->avctx, "dc=%d\n", block[0]);
327 1918190 mismatch = block[0] ^ 1;
328 1918190 i = 0;
329
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 1918190 if (s->intra_vlc_format)
330 1335644 rl_vlc = ff_mpeg2_rl_vlc;
331 else
332 582546 rl_vlc = ff_mpeg1_rl_vlc;
333
334 {
335 1918190 OPEN_READER(re, &s->gb);
336 /* now quantify & encode AC coefficients */
337 for (;;) {
338 26595642 UPDATE_CACHE(re, &s->gb);
339
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 14256916 GET_RL_VLC(level, run, re, &s->gb, rl_vlc,
340 TEX_VLC_BITS, 2, 0);
341
342
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 14256916 if (level == 127) {
343 1918180 break;
344
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 12338736 } else if (level != 0) {
345 12204081 i += run;
346
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 12204081 if (i > MAX_INDEX)
347 10 break;
348 12204071 j = scantable[i];
349 12204071 level = (level * qscale * quant_matrix[j]) >> 4;
350 12204071 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) -
351 12204071 SHOW_SBITS(re, &s->gb, 1);
352 12204071 LAST_SKIP_BITS(re, &s->gb, 1);
353 } else {
354 /* escape */
355 134655 run = SHOW_UBITS(re, &s->gb, 6) + 1;
356 134655 SKIP_BITS(re, &s->gb, 6);
357 134655 level = SHOW_SBITS(re, &s->gb, 12);
358 134655 LAST_SKIP_BITS(re, &s->gb, 12);
359 134655 i += run;
360
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 134655 if (i > MAX_INDEX)
361 ✗ break;
362 134655 j = scantable[i];
363
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 134655 if (level < 0) {
364 60137 level = (-level * qscale * quant_matrix[j]) >> 4;
365 60137 level = -level;
366 } else {
367 74518 level = (level * qscale * quant_matrix[j]) >> 4;
368 }
369 }
370
371 12338726 mismatch ^= level;
372 12338726 block[j] = level;
373 }
374 1918190 CLOSE_READER(re, &s->gb);
375 }
376 1918190 block[63] ^= mismatch & 1;
377
378
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 1918190 check_scantable_index(s, i);
379
380 1918180 s->block_last_index[n] = i;
381 1918180 return 0;
382 }
383
384 43364 static inline int get_dmv(MpegEncContext *s)
385 {
386
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 43364 if (get_bits1(&s->gb))
387 40429 return 1 - (get_bits1(&s->gb) << 1);
388 else
389 2935 return 0;
390 }
391
392 /* motion type (for MPEG-2) */
393 #define MT_FIELD 1
394 #define MT_FRAME 2
395 #define MT_16X8 2
396 #define MT_DMV 3
397
398 2608570 static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64])
399 {
400 int i, j, k, cbp, val, mb_type, motion_type;
401 2608570 const int mb_block_count = 4 + (1 << s->chroma_format);
402 int ret;
403
404 ff_tlog(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
405
406 av_assert2(s->mb_skipped == 0);
407
408
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 2608570 if (s->mb_skip_run-- != 0) {
409
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 165474 if (s->pict_type == AV_PICTURE_TYPE_P) {
410 57407 s->mb_skipped = 1;
411 57407 s->cur_pic.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
412 MB_TYPE_SKIP | MB_TYPE_FORWARD_MV | MB_TYPE_16x16;
413 } else {
414 int mb_type;
415
416
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 108067 if (s->mb_x)
417 108067 mb_type = s->cur_pic.mb_type[s->mb_x + s->mb_y * s->mb_stride - 1];
418 else
419 // FIXME not sure if this is allowed in MPEG at all
420 ✗ mb_type = s->cur_pic.mb_type[s->mb_width + (s->mb_y - 1) * s->mb_stride - 1];
421
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 108067 if (IS_INTRA(mb_type)) {
422 ✗ av_log(s->avctx, AV_LOG_ERROR, "skip with previntra\n");
423 ✗ return AVERROR_INVALIDDATA;
424 }
425 108067 s->cur_pic.mb_type[s->mb_x + s->mb_y * s->mb_stride] =
426 108067 mb_type | MB_TYPE_SKIP;
427
428
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 108067 if ((s->mv[0][0][0] | s->mv[0][0][1] | s->mv[1][0][0] | s->mv[1][0][1]) == 0)
429 75586 s->mb_skipped = 1;
430 }
431
432 165474 return 0;
433 }
434
435
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 2443096 switch (s->pict_type) {
436 240018 default:
437 case AV_PICTURE_TYPE_I:
438
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 240018 if (get_bits1(&s->gb) == 0) {
439
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 18250 if (get_bits1(&s->gb) == 0) {
440 ✗ av_log(s->avctx, AV_LOG_ERROR,
441 "Invalid mb type in I-frame at %d %d\n",
442 s->mb_x, s->mb_y);
443 ✗ return AVERROR_INVALIDDATA;
444 }
445 18250 mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
446 } else {
447 221768 mb_type = MB_TYPE_INTRA;
448 }
449 240018 break;
450 1341785 case AV_PICTURE_TYPE_P:
451 1341785 mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc, MB_PTYPE_VLC_BITS, 1);
452
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 1341785 if (mb_type < 0) {
453 ✗ av_log(s->avctx, AV_LOG_ERROR,
454 "Invalid mb type in P-frame at %d %d\n", s->mb_x, s->mb_y);
455 ✗ return AVERROR_INVALIDDATA;
456 }
457 1341785 break;
458 861293 case AV_PICTURE_TYPE_B:
459 861293 mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc, MB_BTYPE_VLC_BITS, 1);
460
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 861293 if (mb_type < 0) {
461 ✗ av_log(s->avctx, AV_LOG_ERROR,
462 "Invalid mb type in B-frame at %d %d\n", s->mb_x, s->mb_y);
463 ✗ return AVERROR_INVALIDDATA;
464 }
465 861293 break;
466 }
467 ff_tlog(s->avctx, "mb_type=%x\n", mb_type);
468 // motion_type = 0; /* avoid warning */
469
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 2443096 if (IS_INTRA(mb_type)) {
470 322656 s->bdsp.clear_blocks(s->block[0]);
471
472
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 322656 if (!s->chroma_y_shift)
473 54159 s->bdsp.clear_blocks(s->block[6]);
474
475 /* compute DCT type */
476 // FIXME: add an interlaced_dct coded var?
477
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 322656 if (s->picture_structure == PICT_FRAME &&
478
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 263992 !s->frame_pred_frame_dct)
479 120691 s->interlaced_dct = get_bits1(&s->gb);
480
481
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 322656 if (IS_QUANT(mb_type))
482 26414 s->qscale = mpeg_get_qscale(s);
483
484
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 322656 if (s->concealment_motion_vectors) {
485 /* just parse them */
486
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 1356 if (s->picture_structure != PICT_FRAME)
487 1350 skip_bits1(&s->gb); /* field select */
488
489 1356 s->mv[0][0][0] =
490 1356 s->last_mv[0][0][0] =
491 1356 s->last_mv[0][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[0][0],
492 s->last_mv[0][0][0]);
493 1356 s->mv[0][0][1] =
494 1356 s->last_mv[0][0][1] =
495 1356 s->last_mv[0][1][1] = mpeg_decode_motion(s, s->mpeg_f_code[0][1],
496 s->last_mv[0][0][1]);
497
498 1356 check_marker(s->avctx, &s->gb, "after concealment_motion_vectors");
499 } else {
500 /* reset mv prediction */
501 321300 memset(s->last_mv, 0, sizeof(s->last_mv));
502 }
503 322656 s->mb_intra = 1;
504
505
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 322656 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
506
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 2219832 for (i = 0; i < mb_block_count; i++)
507
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 1918190 if ((ret = mpeg2_decode_block_intra(s, s->block[i], i)) < 0)
508 10 return ret;
509 } else {
510
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 147028 for (i = 0; i < 6; i++) {
511 126024 ret = ff_mpeg1_decode_block_intra(&s->gb,
512 126024 s->intra_matrix,
513 126024 s->intra_scantable.permutated,
514 126024 s->last_dc, s->block[i],
515 i, s->qscale);
516
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 126024 if (ret < 0) {
517 ✗ av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",
518 s->mb_x, s->mb_y);
519 ✗ return ret;
520 }
521
522 126024 s->block_last_index[i] = ret;
523 }
524 }
525 } else {
526
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 2120440 if (mb_type & MB_TYPE_ZERO_MV) {
527 av_assert2(mb_type & MB_TYPE_CBP);
528
529 212736 s->mv_dir = MV_DIR_FORWARD;
530
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 212736 if (s->picture_structure == PICT_FRAME) {
531
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 87905 if (s->picture_structure == PICT_FRAME
532
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 87905 && !s->frame_pred_frame_dct)
533 53337 s->interlaced_dct = get_bits1(&s->gb);
534 87905 s->mv_type = MV_TYPE_16X16;
535 } else {
536 124831 s->mv_type = MV_TYPE_FIELD;
537 124831 mb_type |= MB_TYPE_INTERLACED;
538 124831 s->field_select[0][0] = s->picture_structure - 1;
539 }
540
541
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 212736 if (IS_QUANT(mb_type))
542 52077 s->qscale = mpeg_get_qscale(s);
543
544 212736 s->last_mv[0][0][0] = 0;
545 212736 s->last_mv[0][0][1] = 0;
546 212736 s->last_mv[0][1][0] = 0;
547 212736 s->last_mv[0][1][1] = 0;
548 212736 s->mv[0][0][0] = 0;
549 212736 s->mv[0][0][1] = 0;
550 } else {
551 av_assert2(mb_type & MB_TYPE_BIDIR_MV);
552 // FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
553 /* get additional motion vector type */
554
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 1907704 if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct) {
555 700747 motion_type = MT_FRAME;
556 } else {
557 1206957 motion_type = get_bits(&s->gb, 2);
558
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 1206957 if (s->picture_structure == PICT_FRAME && HAS_CBP(mb_type))
559 515636 s->interlaced_dct = get_bits1(&s->gb);
560 }
561
562
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 1907704 if (IS_QUANT(mb_type))
563 175186 s->qscale = mpeg_get_qscale(s);
564
565 /* motion vectors */
566 1907704 s->mv_dir = MB_TYPE_MV_2_MV_DIR(mb_type);
567 ff_tlog(s->avctx, "motion_type=%d\n", motion_type);
568
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 1907704 switch (motion_type) {
569 1622844 case MT_FRAME: /* or MT_16X8 */
570
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 1622844 if (s->picture_structure == PICT_FRAME) {
571 1332186 mb_type |= MB_TYPE_16x16;
572 1332186 s->mv_type = MV_TYPE_16X16;
573
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 3996558 for (i = 0; i < 2; i++) {
574
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 2664372 if (HAS_MV(mb_type, i)) {
575 /* MT_FRAME */
576 1716696 s->mv[i][0][0] =
577 1716696 s->last_mv[i][0][0] =
578 1716696 s->last_mv[i][1][0] =
579 1716696 mpeg_decode_motion(s, s->mpeg_f_code[i][0],
580 s->last_mv[i][0][0]);
581 1716696 s->mv[i][0][1] =
582 1716696 s->last_mv[i][0][1] =
583 1716696 s->last_mv[i][1][1] =
584 1716696 mpeg_decode_motion(s, s->mpeg_f_code[i][1],
585 s->last_mv[i][0][1]);
586 /* full_pel: only for MPEG-1 */
587
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 1716696 if (s->full_pel[i]) {
588 ✗ s->mv[i][0][0] *= 2;
589 ✗ s->mv[i][0][1] *= 2;
590 }
591 }
592 }
593 } else {
594 290658 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
595 290658 s->mv_type = MV_TYPE_16X8;
596
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 871974 for (i = 0; i < 2; i++) {
597
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 581316 if (HAS_MV(mb_type, i)) {
598 /* MT_16X8 */
599
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 876060 for (j = 0; j < 2; j++) {
600 584040 s->field_select[i][j] = get_bits1(&s->gb);
601
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 1752120 for (k = 0; k < 2; k++) {
602 1168080 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
603 s->last_mv[i][j][k]);
604 1168080 s->last_mv[i][j][k] = val;
605 1168080 s->mv[i][j][k] = val;
606 }
607 }
608 }
609 }
610 }
611 1622844 break;
612 263178 case MT_FIELD:
613 263178 s->mv_type = MV_TYPE_FIELD;
614
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 263178 if (s->picture_structure == PICT_FRAME) {
615 70559 mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
616
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 211677 for (i = 0; i < 2; i++) {
617
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 141118 if (HAS_MV(mb_type, i)) {
618
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 266148 for (j = 0; j < 2; j++) {
619 177432 s->field_select[i][j] = get_bits1(&s->gb);
620 177432 val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
621 s->last_mv[i][j][0]);
622 177432 s->last_mv[i][j][0] = val;
623 177432 s->mv[i][j][0] = val;
624 ff_tlog(s->avctx, "fmx=%d\n", val);
625 177432 val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
626 177432 s->last_mv[i][j][1] >> 1);
627 177432 s->last_mv[i][j][1] = 2 * val;
628 177432 s->mv[i][j][1] = val;
629 ff_tlog(s->avctx, "fmy=%d\n", val);
630 }
631 }
632 }
633 } else {
634
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 192619 av_assert0(!s->progressive_sequence);
635 192619 mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
636
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 577857 for (i = 0; i < 2; i++) {
637
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 385238 if (HAS_MV(mb_type, i)) {
638 197293 s->field_select[i][0] = get_bits1(&s->gb);
639
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 591879 for (k = 0; k < 2; k++) {
640 394586 val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
641 s->last_mv[i][0][k]);
642 394586 s->last_mv[i][0][k] = val;
643 394586 s->last_mv[i][1][k] = val;
644 394586 s->mv[i][0][k] = val;
645 }
646 }
647 }
648 }
649 263178 break;
650 21682 case MT_DMV:
651
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 21682 if (s->progressive_sequence){
652 ✗ av_log(s->avctx, AV_LOG_ERROR, "MT_DMV in progressive_sequence\n");
653 ✗ return AVERROR_INVALIDDATA;
654 }
655 21682 s->mv_type = MV_TYPE_DMV;
656
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 65046 for (i = 0; i < 2; i++) {
657
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 43364 if (HAS_MV(mb_type, i)) {
658 int dmx, dmy, mx, my, m;
659 21682 const int my_shift = s->picture_structure == PICT_FRAME;
660
661 21682 mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
662 s->last_mv[i][0][0]);
663 21682 s->last_mv[i][0][0] = mx;
664 21682 s->last_mv[i][1][0] = mx;
665 21682 dmx = get_dmv(s);
666 21682 my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
667 21682 s->last_mv[i][0][1] >> my_shift);
668 21682 dmy = get_dmv(s);
669
670
671 21682 s->last_mv[i][0][1] = my * (1 << my_shift);
672 21682 s->last_mv[i][1][1] = my * (1 << my_shift);
673
674 21682 s->mv[i][0][0] = mx;
675 21682 s->mv[i][0][1] = my;
676 21682 s->mv[i][1][0] = mx; // not used
677 21682 s->mv[i][1][1] = my; // not used
678
679
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 21682 if (s->picture_structure == PICT_FRAME) {
680 ✗ mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
681
682 // m = 1 + 2 * s->top_field_first;
683 ✗ m = s->top_field_first ? 1 : 3;
684
685 /* top -> top pred */
686 ✗ s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
687 ✗ s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
688 ✗ m = 4 - m;
689 ✗ s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
690 ✗ s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
691 } else {
692 21682 mb_type |= MB_TYPE_16x16;
693
694 21682 s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
695 21682 s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
696
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 21682 if (s->picture_structure == PICT_TOP_FIELD)
697 18576 s->mv[i][2][1]--;
698 else
699 3106 s->mv[i][2][1]++;
700 }
701 }
702 }
703 21682 break;
704 ✗ default:
705 ✗ av_log(s->avctx, AV_LOG_ERROR,
706 "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
707 ✗ return AVERROR_INVALIDDATA;
708 }
709 }
710
711 2120440 s->mb_intra = 0;
712 2120440 s->last_dc[0] = s->last_dc[1] = s->last_dc[2] = 128 << s->intra_dc_precision;
713
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 2120440 if (HAS_CBP(mb_type)) {
714 1698815 s->bdsp.clear_blocks(s->block[0]);
715
716 1698815 cbp = get_vlc2(&s->gb, ff_mb_pat_vlc, MB_PAT_VLC_BITS, 1);
717
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 1698815 if (mb_block_count > 6) {
718 43689 cbp *= 1 << mb_block_count - 6;
719 43689 cbp |= get_bits(&s->gb, mb_block_count - 6);
720 43689 s->bdsp.clear_blocks(s->block[6]);
721 }
722
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 1698815 if (cbp <= 0) {
723 ✗ av_log(s->avctx, AV_LOG_ERROR,
724 "invalid cbp %d at %d %d\n", cbp, s->mb_x, s->mb_y);
725 ✗ return AVERROR_INVALIDDATA;
726 }
727
728
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 1698815 if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
729 1587079 cbp <<= 12 - mb_block_count;
730
731
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 11196931 for (i = 0; i < mb_block_count; i++) {
732
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 9609852 if (cbp & (1 << 11)) {
733
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 5126690 if ((ret = mpeg2_decode_block_non_intra(s, s->block[i], i)) < 0)
734 ✗ return ret;
735 } else {
736 4483162 s->block_last_index[i] = -1;
737 }
738 9609852 cbp += cbp;
739 }
740 } else {
741
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 782152 for (i = 0; i < 6; i++) {
742
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 670416 if (cbp & 32) {
743
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 403182 if ((ret = mpeg1_decode_block_inter(s, s->block[i], i)) < 0)
744 ✗ return ret;
745 } else {
746 267234 s->block_last_index[i] = -1;
747 }
748 670416 cbp += cbp;
749 }
750 }
751 } else {
752
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 5481125 for (i = 0; i < 12; i++)
753 5059500 s->block_last_index[i] = -1;
754 }
755 }
756
757 2443086 s->cur_pic.mb_type[s->mb_x + s->mb_y * s->mb_stride] = mb_type;
758
759 2443086 return 0;
760 }
761
762 288 static av_cold int mpeg_decode_init(AVCodecContext *avctx)
763 {
764 288 Mpeg1Context *s = avctx->priv_data;
765 288 MpegEncContext *s2 = &s->mpeg_enc_ctx;
766 int ret;
767
768 288 s2->out_format = FMT_MPEG1;
769
770
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 288 if ( avctx->codec_tag != AV_RL32("VCR2")
771
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 286 && avctx->codec_tag != AV_RL32("BW10"))
772 286 avctx->coded_width = avctx->coded_height = 0; // do not trust dimensions from input
773 288 ret = ff_mpv_decode_init(s2, avctx);
774
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 288 if (ret < 0)
775 ✗ return ret;
776
777 288 ff_mpeg12_init_vlcs();
778
779 288 s2->chroma_format = CHROMA_420;
780 288 avctx->color_range = AVCOL_RANGE_MPEG;
781 288 return 0;
782 }
783
784 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
785 #if CONFIG_MPEG1_NVDEC_HWACCEL
786 AV_PIX_FMT_CUDA,
787 #endif
788 #if CONFIG_MPEG1_VDPAU_HWACCEL
789 AV_PIX_FMT_VDPAU,
790 #endif
791 AV_PIX_FMT_YUV420P,
792 AV_PIX_FMT_NONE
793 };
794
795 static const enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[] = {
796 #if CONFIG_MPEG2_NVDEC_HWACCEL
797 AV_PIX_FMT_CUDA,
798 #endif
799 #if CONFIG_MPEG2_VDPAU_HWACCEL
800 AV_PIX_FMT_VDPAU,
801 #endif
802 #if CONFIG_MPEG2_DXVA2_HWACCEL
803 AV_PIX_FMT_DXVA2_VLD,
804 #endif
805 #if CONFIG_MPEG2_D3D11VA_HWACCEL
806 AV_PIX_FMT_D3D11VA_VLD,
807 AV_PIX_FMT_D3D11,
808 #endif
809 #if CONFIG_MPEG2_D3D12VA_HWACCEL
810 AV_PIX_FMT_D3D12,
811 #endif
812 #if CONFIG_MPEG2_VAAPI_HWACCEL
813 AV_PIX_FMT_VAAPI,
814 #endif
815 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
816 AV_PIX_FMT_VIDEOTOOLBOX,
817 #endif
818 AV_PIX_FMT_YUV420P,
819 AV_PIX_FMT_NONE
820 };
821
822 static const enum AVPixelFormat mpeg12_pixfmt_list_422[] = {
823 AV_PIX_FMT_YUV422P,
824 AV_PIX_FMT_NONE
825 };
826
827 static const enum AVPixelFormat mpeg12_pixfmt_list_444[] = {
828 AV_PIX_FMT_YUV444P,
829 AV_PIX_FMT_NONE
830 };
831
832 261 static enum AVPixelFormat mpeg_get_pixelformat(AVCodecContext *avctx)
833 {
834 261 Mpeg1Context *s1 = avctx->priv_data;
835 261 MpegEncContext *s = &s1->mpeg_enc_ctx;
836 const enum AVPixelFormat *pix_fmts;
837
838 if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY))
839 return AV_PIX_FMT_GRAY8;
840
841
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 261 if (s->chroma_format < CHROMA_422)
842 200 pix_fmts = avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO ?
843
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 200 mpeg1_hwaccel_pixfmt_list_420 :
844 mpeg2_hwaccel_pixfmt_list_420;
845
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 61 else if (s->chroma_format == CHROMA_422)
846 61 pix_fmts = mpeg12_pixfmt_list_422;
847 else
848 ✗ pix_fmts = mpeg12_pixfmt_list_444;
849
850 261 return ff_get_format(avctx, pix_fmts);
851 }
852
853 /* Call this function when we know all parameters.
854 * It may be called in different places for MPEG-1 and MPEG-2. */
855 5062 static int mpeg_decode_postinit(AVCodecContext *avctx)
856 {
857 5062 Mpeg1Context *s1 = avctx->priv_data;
858 5062 MpegEncContext *s = &s1->mpeg_enc_ctx;
859 int ret;
860
861
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 5062 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
862 // MPEG-1 aspect
863 494 AVRational aspect_inv = av_d2q(ff_mpeg1_aspect[s1->aspect_ratio_info], 255);
864 494 avctx->sample_aspect_ratio = (AVRational) { aspect_inv.den, aspect_inv.num };
865 } else { // MPEG-2
866 // MPEG-2 aspect
867
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 4568 if (s1->aspect_ratio_info > 1) {
868 AVRational dar =
869 2528 av_mul_q(av_div_q(ff_mpeg2_aspect[s1->aspect_ratio_info],
870 2528 (AVRational) { s1->pan_scan.width,
871 2528 s1->pan_scan.height }),
872 2528 (AVRational) { s->width, s->height });
873
874 /* We ignore the spec here and guess a bit as reality does not
875 * match the spec, see for example res_change_ffmpeg_aspect.ts
876 * and sequence-display-aspect.mpg.
877 * issue1613, 621, 562 */
878
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 3111 if ((s1->pan_scan.width == 0) || (s1->pan_scan.height == 0) ||
879
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 610 (av_cmp_q(dar, (AVRational) { 4, 3 }) &&
880 27 av_cmp_q(dar, (AVRational) { 16, 9 }))) {
881 1971 s->avctx->sample_aspect_ratio =
882 1971 av_div_q(ff_mpeg2_aspect[s1->aspect_ratio_info],
883 1971 (AVRational) { s->width, s->height });
884 } else {
885 557 s->avctx->sample_aspect_ratio =
886 557 av_div_q(ff_mpeg2_aspect[s1->aspect_ratio_info],
887 557 (AVRational) { s1->pan_scan.width, s1->pan_scan.height });
888 // issue1613 4/3 16/9 -> 16/9
889 // res_change_ffmpeg_aspect.ts 4/3 225/44 ->4/3
890 // widescreen-issue562.mpg 4/3 16/9 -> 16/9
891 // s->avctx->sample_aspect_ratio = av_mul_q(s->avctx->sample_aspect_ratio, (AVRational) {s->width, s->height});
892 ff_dlog(avctx, "aspect A %d/%d\n",
893 ff_mpeg2_aspect[s1->aspect_ratio_info].num,
894 ff_mpeg2_aspect[s1->aspect_ratio_info].den);
895 ff_dlog(avctx, "aspect B %d/%d\n", s->avctx->sample_aspect_ratio.num,
896 s->avctx->sample_aspect_ratio.den);
897 }
898 } else {
899 2040 s->avctx->sample_aspect_ratio =
900 2040 ff_mpeg2_aspect[s1->aspect_ratio_info];
901 }
902 } // MPEG-2
903
904
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 5062 if (av_image_check_sar(s->width, s->height,
905 avctx->sample_aspect_ratio) < 0) {
906 ✗ av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
907 avctx->sample_aspect_ratio.num,
908 avctx->sample_aspect_ratio.den);
909 ✗ avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
910 }
911
912
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 5062 if (!s->context_initialized ||
913
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 4803 avctx->coded_width != s->width ||
914
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 4803 avctx->coded_height != s->height ||
915
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 4803 s1->save_chroma_format != s->chroma_format ||
916
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 4803 (s1->save_progressive_seq != s->progressive_sequence && FFALIGN(s->height, 16) != FFALIGN(s->height, 32)) ||
917 0) {
918
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 259 if (s->context_initialized)
919 ✗ ff_mpv_common_end(s);
920
921 259 ret = ff_set_dimensions(avctx, s->width, s->height);
922
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 259 if (ret < 0)
923 ✗ return ret;
924
925
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 259 if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO && s1->bit_rate &&
926
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 234 (s1->bit_rate != 0x3FFFF*400)) {
927 99 avctx->rc_max_rate = s1->bit_rate;
928
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 160 } else if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && s1->bit_rate &&
929
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 25 (s1->bit_rate != 0x3FFFF*400 || s1->vbv_delay != 0xFFFF)) {
930 25 avctx->bit_rate = s1->bit_rate;
931 }
932 259 s1->save_progressive_seq = s->progressive_sequence;
933 259 s1->save_chroma_format = s->chroma_format;
934
935 /* low_delay may be forced, in this case we will have B-frames
936 * that behave like P-frames. */
937 259 avctx->has_b_frames = !s->low_delay;
938
939
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 259 if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
940 // MPEG-1 fps
941 25 avctx->framerate = ff_mpeg12_frame_rate_tab[s1->frame_rate_index];
942 25 avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
943 } else { // MPEG-2
944 // MPEG-2 fps
945 234 av_reduce(&s->avctx->framerate.num,
946 234 &s->avctx->framerate.den,
947 234 ff_mpeg12_frame_rate_tab[s1->frame_rate_index].num * s1->frame_rate_ext.num,
948 234 ff_mpeg12_frame_rate_tab[s1->frame_rate_index].den * s1->frame_rate_ext.den,
949 1 << 30);
950
951
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 234 switch (s->chroma_format) {
952 173 case CHROMA_420: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break;
953 61 case CHROMA_422:
954 61 case CHROMA_444: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break;
955 ✗ default: av_assert0(0);
956 }
957 } // MPEG-2
958
959 259 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
960
961
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 259 if ((ret = ff_mpv_common_init(s)) < 0)
962 ✗ return ret;
963
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 259 if (!s->avctx->lowres)
964
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 558 for (int i = 0; i < s->slice_context_count; i++)
965 299 ff_mpv_framesize_disable(&s->thread_context[i]->sc);
966 }
967 5062 return 0;
968 }
969
970 5062 static int mpeg1_decode_picture(AVCodecContext *avctx, const uint8_t *buf,
971 int buf_size)
972 {
973 5062 Mpeg1Context *s1 = avctx->priv_data;
974 5062 MpegEncContext *s = &s1->mpeg_enc_ctx;
975 int ref, f_code, vbv_delay, ret;
976
977 5062 ret = init_get_bits8(&s->gb, buf, buf_size);
978
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 5062 if (ret < 0)
979 ✗ return ret;
980
981 5062 ref = get_bits(&s->gb, 10); /* temporal ref */
982 5062 s->pict_type = get_bits(&s->gb, 3);
983
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 5062 if (s->pict_type == 0 || s->pict_type > 3)
984 ✗ return AVERROR_INVALIDDATA;
985
986 5062 vbv_delay = get_bits(&s->gb, 16);
987 5062 s1->vbv_delay = vbv_delay;
988
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 5062 if (s->pict_type == AV_PICTURE_TYPE_P ||
989
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 2330 s->pict_type == AV_PICTURE_TYPE_B) {
990 4350 s->full_pel[0] = get_bits1(&s->gb);
991 4350 f_code = get_bits(&s->gb, 3);
992
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 4350 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
993 ✗ return AVERROR_INVALIDDATA;
994 4350 f_code += !f_code;
995 4350 s->mpeg_f_code[0][0] = f_code;
996 4350 s->mpeg_f_code[0][1] = f_code;
997 }
998
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 5062 if (s->pict_type == AV_PICTURE_TYPE_B) {
999 1618 s->full_pel[1] = get_bits1(&s->gb);
1000 1618 f_code = get_bits(&s->gb, 3);
1001
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 1618 if (f_code == 0 && (avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)))
1002 ✗ return AVERROR_INVALIDDATA;
1003 1618 f_code += !f_code;
1004 1618 s->mpeg_f_code[1][0] = f_code;
1005 1618 s->mpeg_f_code[1][1] = f_code;
1006 }
1007
1008
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 5062 if (avctx->debug & FF_DEBUG_PICT_INFO)
1009 ✗ av_log(avctx, AV_LOG_DEBUG,
1010 "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type);
1011
1012 5062 return 0;
1013 }
1014
1015 718 static void mpeg_decode_sequence_extension(Mpeg1Context *s1)
1016 {
1017 718 MpegEncContext *s = &s1->mpeg_enc_ctx;
1018 int horiz_size_ext, vert_size_ext;
1019 int bit_rate_ext;
1020
1021 718 skip_bits(&s->gb, 1); /* profile and level esc*/
1022 718 s->avctx->profile = get_bits(&s->gb, 3);
1023 718 s->avctx->level = get_bits(&s->gb, 4);
1024 718 s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
1025 718 s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */
1026
1027
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 718 if (!s->chroma_format) {
1028 ✗ s->chroma_format = CHROMA_420;
1029 ✗ av_log(s->avctx, AV_LOG_WARNING, "Chroma format invalid\n");
1030 }
1031
1032 718 horiz_size_ext = get_bits(&s->gb, 2);
1033 718 vert_size_ext = get_bits(&s->gb, 2);
1034 718 s->width |= (horiz_size_ext << 12);
1035 718 s->height |= (vert_size_ext << 12);
1036 718 bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */
1037 718 s1->bit_rate += (bit_rate_ext << 18) * 400LL;
1038 718 check_marker(s->avctx, &s->gb, "after bit rate extension");
1039 718 s->avctx->rc_buffer_size += get_bits(&s->gb, 8) * 1024 * 16 << 10;
1040
1041 718 s->low_delay = get_bits1(&s->gb);
1042
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 718 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
1043 ✗ s->low_delay = 1;
1044
1045 718 s1->frame_rate_ext.num = get_bits(&s->gb, 2) + 1;
1046 718 s1->frame_rate_ext.den = get_bits(&s->gb, 5) + 1;
1047
1048 ff_dlog(s->avctx, "sequence extension\n");
1049 718 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1050
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 718 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1052 ✗ av_log(s->avctx, AV_LOG_DEBUG,
1053 "profile: %d, level: %d ps: %d cf:%d vbv buffer: %d, bitrate:%"PRId64"\n",
1054 ✗ s->avctx->profile, s->avctx->level, s->progressive_sequence, s->chroma_format,
1055 ✗ s->avctx->rc_buffer_size, s1->bit_rate);
1056 718 }
1057
1058 95 static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
1059 {
1060 95 MpegEncContext *s = &s1->mpeg_enc_ctx;
1061 int color_description, w, h;
1062
1063 95 skip_bits(&s->gb, 3); /* video format */
1064 95 color_description = get_bits1(&s->gb);
1065
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 95 if (color_description) {
1066 33 s->avctx->color_primaries = get_bits(&s->gb, 8);
1067 33 s->avctx->color_trc = get_bits(&s->gb, 8);
1068 33 s->avctx->colorspace = get_bits(&s->gb, 8);
1069 }
1070 95 w = get_bits(&s->gb, 14);
1071 95 skip_bits(&s->gb, 1); // marker
1072 95 h = get_bits(&s->gb, 14);
1073 // remaining 3 bits are zero padding
1074
1075 95 s1->pan_scan.width = 16 * w;
1076 95 s1->pan_scan.height = 16 * h;
1077
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 95 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1079 ✗ av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
1080 95 }
1081
1082 27 static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
1083 {
1084 27 MpegEncContext *s = &s1->mpeg_enc_ctx;
1085 int i, nofco;
1086
1087 27 nofco = 1;
1088
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 27 if (s->progressive_sequence) {
1089 ✗ if (s->repeat_first_field) {
1090 ✗ nofco++;
1091 ✗ if (s->top_field_first)
1092 ✗ nofco++;
1093 }
1094 } else {
1095
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 27 if (s->picture_structure == PICT_FRAME) {
1096 9 nofco++;
1097
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 9 if (s->repeat_first_field)
1098 6 nofco++;
1099 }
1100 }
1101
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 69 for (i = 0; i < nofco; i++) {
1102 42 s1->pan_scan.position[i][0] = get_sbits(&s->gb, 16);
1103 42 skip_bits(&s->gb, 1); // marker
1104 42 s1->pan_scan.position[i][1] = get_sbits(&s->gb, 16);
1105 42 skip_bits(&s->gb, 1); // marker
1106 }
1107
1108
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 27 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1109 ✗ av_log(s->avctx, AV_LOG_DEBUG,
1110 "pde (%"PRId16",%"PRId16") (%"PRId16",%"PRId16") (%"PRId16",%"PRId16")\n",
1111 ✗ s1->pan_scan.position[0][0], s1->pan_scan.position[0][1],
1112 ✗ s1->pan_scan.position[1][0], s1->pan_scan.position[1][1],
1113 ✗ s1->pan_scan.position[2][0], s1->pan_scan.position[2][1]);
1114 27 }
1115
1116 224 static int load_matrix(MpegEncContext *s, uint16_t matrix0[64],
1117 uint16_t matrix1[64], int intra)
1118 {
1119 int i;
1120
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 14560 for (i = 0; i < 64; i++) {
1122 14336 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
1123 14336 int v = get_bits(&s->gb, 8);
1124
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 14336 if (v == 0) {
1125 ✗ av_log(s->avctx, AV_LOG_ERROR, "matrix damaged\n");
1126 ✗ return AVERROR_INVALIDDATA;
1127 }
1128
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 14336 if (intra && i == 0 && v != 8) {
1129 ✗ av_log(s->avctx, AV_LOG_DEBUG, "intra matrix specifies invalid DC quantizer %d, ignoring\n", v);
1130 ✗ v = 8; // needed by pink.mpg / issue1046
1131 }
1132 14336 matrix0[j] = v;
1133
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 14336 if (matrix1)
1134 13696 matrix1[j] = v;
1135 }
1136 224 return 0;
1137 }
1138
1139 985 static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
1140 {
1141 ff_dlog(s->avctx, "matrix extension\n");
1142
1143
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 985 if (get_bits1(&s->gb))
1144 34 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
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 985 if (get_bits1(&s->gb))
1146 74 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
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 985 if (get_bits1(&s->gb))
1148 9 load_matrix(s, s->chroma_intra_matrix, NULL, 1);
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 985 if (get_bits1(&s->gb))
1150 1 load_matrix(s, s->chroma_inter_matrix, NULL, 0);
1151 985 }
1152
1153 4568 static int mpeg_decode_picture_coding_extension(Mpeg1Context *s1)
1154 {
1155 4568 MpegEncContext *s = &s1->mpeg_enc_ctx;
1156
1157 4568 s->full_pel[0] = s->full_pel[1] = 0;
1158 4568 s->mpeg_f_code[0][0] = get_bits(&s->gb, 4);
1159 4568 s->mpeg_f_code[0][1] = get_bits(&s->gb, 4);
1160 4568 s->mpeg_f_code[1][0] = get_bits(&s->gb, 4);
1161 4568 s->mpeg_f_code[1][1] = get_bits(&s->gb, 4);
1162 4568 s->mpeg_f_code[0][0] += !s->mpeg_f_code[0][0];
1163 4568 s->mpeg_f_code[0][1] += !s->mpeg_f_code[0][1];
1164 4568 s->mpeg_f_code[1][0] += !s->mpeg_f_code[1][0];
1165 4568 s->mpeg_f_code[1][1] += !s->mpeg_f_code[1][1];
1166
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 4568 if (!s->pict_type && s->context_initialized) {
1167 ✗ av_log(s->avctx, AV_LOG_ERROR, "Missing picture start code\n");
1168 ✗ if (s->avctx->err_recognition & AV_EF_EXPLODE)
1169 ✗ return AVERROR_INVALIDDATA;
1170 ✗ av_log(s->avctx, AV_LOG_WARNING, "Guessing pict_type from mpeg_f_code\n");
1171 ✗ if (s->mpeg_f_code[1][0] == 15 && s->mpeg_f_code[1][1] == 15) {
1172 ✗ if (s->mpeg_f_code[0][0] == 15 && s->mpeg_f_code[0][1] == 15)
1173 ✗ s->pict_type = AV_PICTURE_TYPE_I;
1174 else
1175 ✗ s->pict_type = AV_PICTURE_TYPE_P;
1176 } else
1177 ✗ s->pict_type = AV_PICTURE_TYPE_B;
1178 }
1179
1180 4568 s->intra_dc_precision = get_bits(&s->gb, 2);
1181 4568 s->picture_structure = get_bits(&s->gb, 2);
1182 4568 s->top_field_first = get_bits1(&s->gb);
1183 4568 s->frame_pred_frame_dct = get_bits1(&s->gb);
1184 4568 s->concealment_motion_vectors = get_bits1(&s->gb);
1185 4568 s->q_scale_type = get_bits1(&s->gb);
1186 4568 s->intra_vlc_format = get_bits1(&s->gb);
1187 4568 s->alternate_scan = get_bits1(&s->gb);
1188 4568 s->repeat_first_field = get_bits1(&s->gb);
1189 4568 s->chroma_420_type = get_bits1(&s->gb);
1190 4568 s->progressive_frame = get_bits1(&s->gb);
1191
1192 // We only initialize intra_scantable.permutated, as this is all we use.
1193 4568 ff_permute_scantable(s->intra_scantable.permutated,
1194 4568 s->alternate_scan ? ff_alternate_vertical_scan : ff_zigzag_direct,
1195
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 4568 s->idsp.idct_permutation);
1196
1197 /* composite display not parsed */
1198 ff_dlog(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
1199 ff_dlog(s->avctx, "picture_structure=%d\n", s->picture_structure);
1200 ff_dlog(s->avctx, "top field first=%d\n", s->top_field_first);
1201 ff_dlog(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
1202 ff_dlog(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
1203 ff_dlog(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
1204 ff_dlog(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
1205 ff_dlog(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
1206 ff_dlog(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
1207
1208 4568 return 0;
1209 }
1210
1211 4617 static int mpeg_field_start(Mpeg1Context *s1, const uint8_t *buf, int buf_size)
1212 {
1213 4617 MpegEncContext *s = &s1->mpeg_enc_ctx;
1214 4617 AVCodecContext *avctx = s->avctx;
1215 4617 int second_field = 0;
1216 int ret;
1217
1218
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 4617 if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
1219
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 4617 if (s->mb_width * s->mb_height * 11LL / (33 * 2 * 8) > buf_size)
1220 ✗ return AVERROR_INVALIDDATA;
1221 }
1222
1223 /* start frame decoding */
1224
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 8520 if (s->first_field || s->picture_structure == PICT_FRAME) {
1225 AVFrameSideData *pan_scan;
1226
1227
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 3903 if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
1228 ✗ return ret;
1229
1230
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 3903 if (s->picture_structure != PICT_FRAME) {
1231 714 s->cur_pic.ptr->f->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST *
1232
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 714 (s->picture_structure == PICT_TOP_FIELD);
1233
1234
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 2856 for (int i = 0; i < 3; i++) {
1235
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 2142 if (s->picture_structure == PICT_BOTTOM_FIELD) {
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 2136 s->cur_pic.data[i] = FF_PTR_ADD(s->cur_pic.data[i],
1237 s->cur_pic.linesize[i]);
1238 }
1239 2142 s->cur_pic.linesize[i] *= 2;
1240 }
1241 }
1242
1243 3903 ff_mpeg_er_frame_start(s);
1244
1245 /* first check if we must repeat the frame */
1246 3903 s->cur_pic.ptr->f->repeat_pict = 0;
1247
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 3903 if (s->repeat_first_field) {
1248
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 6 if (s->progressive_sequence) {
1249 ✗ if (s->top_field_first)
1250 ✗ s->cur_pic.ptr->f->repeat_pict = 4;
1251 else
1252 ✗ s->cur_pic.ptr->f->repeat_pict = 2;
1253
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 6 } else if (s->progressive_frame) {
1254 6 s->cur_pic.ptr->f->repeat_pict = 1;
1255 }
1256 }
1257
1258 3903 ret = ff_frame_new_side_data(s->avctx, s->cur_pic.ptr->f,
1259 AV_FRAME_DATA_PANSCAN, sizeof(s1->pan_scan),
1260 &pan_scan);
1261
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 3903 if (ret < 0)
1262 ✗ return ret;
1263
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 3903 if (pan_scan)
1264 3903 memcpy(pan_scan->data, &s1->pan_scan, sizeof(s1->pan_scan));
1265
1266
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 3903 if (s1->a53_buf_ref) {
1267 742 ret = ff_frame_new_side_data_from_buf(
1268 742 s->avctx, s->cur_pic.ptr->f, AV_FRAME_DATA_A53_CC,
1269 &s1->a53_buf_ref);
1270
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 742 if (ret < 0)
1271 ✗ return ret;
1272 }
1273
1274
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 3903 if (s1->has_stereo3d) {
1275 ✗ AVStereo3D *stereo = av_stereo3d_create_side_data(s->cur_pic.ptr->f);
1276 ✗ if (!stereo)
1277 ✗ return AVERROR(ENOMEM);
1278
1279 ✗ stereo->type = s1->stereo3d_type;
1280 ✗ s1->has_stereo3d = 0;
1281 }
1282
1283
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 3903 if (s1->has_afd) {
1284 AVFrameSideData *sd;
1285 202 ret = ff_frame_new_side_data(s->avctx, s->cur_pic.ptr->f,
1286 AV_FRAME_DATA_AFD, 1, &sd);
1287
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 202 if (ret < 0)
1288 ✗ return ret;
1289
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 202 if (sd)
1290 202 *sd->data = s1->afd;
1291 202 s1->has_afd = 0;
1292 }
1293 } else { // second field
1294 714 second_field = 1;
1295
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 714 if (!s->cur_pic.ptr) {
1296 ✗ av_log(s->avctx, AV_LOG_ERROR, "first field missing\n");
1297 ✗ return AVERROR_INVALIDDATA;
1298 }
1299
1300
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 714 if (s->avctx->hwaccel) {
1301 ✗ if ((ret = FF_HW_SIMPLE_CALL(s->avctx, end_frame)) < 0) {
1302 ✗ av_log(avctx, AV_LOG_ERROR,
1303 "hardware accelerator failed to decode first field\n");
1304 ✗ return ret;
1305 }
1306 }
1307 714 ret = ff_mpv_alloc_dummy_frames(s);
1308
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 714 if (ret < 0)
1309 ✗ return ret;
1310
1311
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 2856 for (int i = 0; i < 3; i++) {
1312 2142 s->cur_pic.data[i] = s->cur_pic.ptr->f->data[i];
1313
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 2142 if (s->picture_structure == PICT_BOTTOM_FIELD)
1314 6 s->cur_pic.data[i] +=
1315 6 s->cur_pic.ptr->f->linesize[i];
1316 }
1317 }
1318
1319
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 4617 if (avctx->hwaccel) {
1320 ✗ if ((ret = FF_HW_CALL(avctx, start_frame, NULL, buf, buf_size)) < 0)
1321 ✗ return ret;
1322
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 4617 } else if (s->codec_tag == MKTAG('V', 'C', 'R', '2')) {
1323 // Exchange UV
1324 157 FFSWAP(uint8_t*, s->cur_pic.data[1], s->cur_pic.data[2]);
1325 157 FFSWAP(ptrdiff_t, s->cur_pic.linesize[1], s->cur_pic.linesize[2]);
1326
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 157 if (!second_field) {
1327 157 FFSWAP(uint8_t*, s->next_pic.data[1], s->next_pic.data[2]);
1328 157 FFSWAP(ptrdiff_t, s->next_pic.linesize[1], s->next_pic.linesize[2]);
1329 157 FFSWAP(uint8_t*, s->last_pic.data[1], s->last_pic.data[2]);
1330 157 FFSWAP(ptrdiff_t, s->last_pic.linesize[1], s->last_pic.linesize[2]);
1331 }
1332 }
1333
1334 4617 return 0;
1335 }
1336
1337 #define DECODE_SLICE_ERROR -1
1338 #define DECODE_SLICE_OK 0
1339
1340 /**
1341 * Decode a slice.
1342 * MpegEncContext.mb_y must be set to the MB row from the startcode.
1343 * @return DECODE_SLICE_ERROR if the slice is damaged,
1344 * DECODE_SLICE_OK if this slice is OK
1345 */
1346 127251 static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
1347 const uint8_t **buf, int buf_size)
1348 {
1349 127251 AVCodecContext *avctx = s->avctx;
1350 127251 const int lowres = s->avctx->lowres;
1351 127251 const int field_pic = s->picture_structure != PICT_FRAME;
1352 int ret;
1353
1354 127251 s->resync_mb_x =
1355 127251 s->resync_mb_y = -1;
1356
1357
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 127251 av_assert0(mb_y < s->mb_height);
1358
1359 127251 ret = init_get_bits8(&s->gb, *buf, buf_size);
1360
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 127251 if (ret < 0)
1361 ✗ return ret;
1362
1363
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 127251 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1364 ✗ skip_bits(&s->gb, 3);
1365
1366 127251 ff_mpeg1_clean_buffers(s);
1367 127251 s->interlaced_dct = 0;
1368
1369 127251 s->qscale = mpeg_get_qscale(s);
1370
1371
1/2
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 127251 if (s->qscale == 0) {
1372 ✗ av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n");
1373 ✗ return AVERROR_INVALIDDATA;
1374 }
1375
1376 /* extra slice info */
1377
1/2
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✓ Branch 2 taken 127251 times.
 127251 if (skip_1stop_8data_bits(&s->gb) < 0)
1378 ✗ return AVERROR_INVALIDDATA;
1379
1380 127251 s->mb_x = 0;
1381
1382
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 127251 if (mb_y == 0 && s->codec_tag == AV_RL32("SLIF")) {
1383 ✗ skip_bits1(&s->gb);
1384 } else {
1385
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 267500 while (get_bits_left(&s->gb) > 0) {
1386 140249 int code = get_vlc2(&s->gb, ff_mbincr_vlc,
1387 MBINCR_VLC_BITS, 2);
1388
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 140249 if (code < 0) {
1389 ✗ av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n");
1390 ✗ return AVERROR_INVALIDDATA;
1391 }
1392
2/2
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 140249 if (code >= 33) {
1393
1/2
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✓ Branch 1 taken 12998 times.
 12998 if (code == 33)
1394 12998 s->mb_x += 33;
1395 /* otherwise, stuffing, nothing to do */
1396 } else {
1397 127251 s->mb_x += code;
1398 127251 break;
1399 }
1400 }
1401 }
1402
1403
1/2
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✓ Branch 1 taken 127251 times.
 127251 if (s->mb_x >= (unsigned) s->mb_width) {
1404 ✗ av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
1405 ✗ return AVERROR_INVALIDDATA;
1406 }
1407
1408
1/2
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✓ Branch 1 taken 127251 times.
 127251 if (avctx->hwaccel) {
1409 ✗ const uint8_t *buf_end, *buf_start = *buf - 4; /* include start_code */
1410 ✗ int start_code = -1;
1411 ✗ buf_end = avpriv_find_start_code(buf_start + 2, *buf + buf_size, &start_code);
1412 ✗ if (buf_end < *buf + buf_size)
1413 ✗ buf_end -= 4;
1414 ✗ s->mb_y = mb_y;
1415 ✗ if (FF_HW_CALL(avctx, decode_slice, buf_start, buf_end - buf_start) < 0)
1416 ✗ return DECODE_SLICE_ERROR;
1417 ✗ *buf = buf_end;
1418 ✗ return DECODE_SLICE_OK;
1419 }
1420
1421 127251 s->resync_mb_x = s->mb_x;
1422 127251 s->resync_mb_y = s->mb_y = mb_y;
1423 127251 s->mb_skip_run = 0;
1424 127251 ff_init_block_index(s);
1425
1426
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✓ Branch 6 taken 3189 times.
✓ Branch 7 taken 712 times.
 127251 if (s->mb_y == 0 && s->mb_x == 0 && (s->first_field || s->picture_structure == PICT_FRAME)) {
1427
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✓ Branch 1 taken 3191 times.
 3191 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
1428 ✗ av_log(s->avctx, AV_LOG_DEBUG,
1429 "qp:%d fc:%2d%2d%2d%2d %c %s %s %s %s dc:%d pstruct:%d fdct:%d cmv:%d qtype:%d ivlc:%d rff:%d %s\n",
1430 s->qscale,
1431 s->mpeg_f_code[0][0], s->mpeg_f_code[0][1],
1432 s->mpeg_f_code[1][0], s->mpeg_f_code[1][1],
1433 ✗ s->pict_type == AV_PICTURE_TYPE_I ? 'I' :
1434 ✗ (s->pict_type == AV_PICTURE_TYPE_P ? 'P' :
1435 ✗ (s->pict_type == AV_PICTURE_TYPE_B ? 'B' : 'S')),
1436 ✗ s->progressive_sequence ? "ps" : "",
1437 ✗ s->progressive_frame ? "pf" : "",
1438 ✗ s->alternate_scan ? "alt" : "",
1439 ✗ s->top_field_first ? "top" : "",
1440 s->intra_dc_precision, s->picture_structure,
1441 s->frame_pred_frame_dct, s->concealment_motion_vectors,
1442 s->q_scale_type, s->intra_vlc_format,
1443 ✗ s->repeat_first_field, s->chroma_420_type ? "420" : "");
1444 }
1445 }
1446
1447 for (;;) {
1448
2/2
✓ Branch 1 taken 10 times.
✓ Branch 2 taken 2608560 times.
 2608570 if ((ret = mpeg_decode_mb(s, s->block)) < 0)
1449 10 return ret;
1450
1451 // Note motion_val is normally NULL unless we want to extract the MVs.
1452
1/2
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✓ Branch 1 taken 2608560 times.
 2608560 if (s->cur_pic.motion_val[0]) {
1453 ✗ const int wrap = s->b8_stride;
1454 ✗ int xy = s->mb_x * 2 + s->mb_y * 2 * wrap;
1455 ✗ int b8_xy = 4 * (s->mb_x + s->mb_y * s->mb_stride);
1456 int motion_x, motion_y, dir, i;
1457
1458 ✗ for (i = 0; i < 2; i++) {
1459 ✗ for (dir = 0; dir < 2; dir++) {
1460 ✗ if (s->mb_intra ||
1461 ✗ (dir == 1 && s->pict_type != AV_PICTURE_TYPE_B)) {
1462 ✗ motion_x = motion_y = 0;
1463 ✗ } else if (s->mv_type == MV_TYPE_16X16 ||
1464 ✗ (s->mv_type == MV_TYPE_FIELD && field_pic)) {
1465 ✗ motion_x = s->mv[dir][0][0];
1466 ✗ motion_y = s->mv[dir][0][1];
1467 } else { /* if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8)) */
1468 ✗ motion_x = s->mv[dir][i][0];
1469 ✗ motion_y = s->mv[dir][i][1];
1470 }
1471
1472 ✗ s->cur_pic.motion_val[dir][xy][0] = motion_x;
1473 ✗ s->cur_pic.motion_val[dir][xy][1] = motion_y;
1474 ✗ s->cur_pic.motion_val[dir][xy + 1][0] = motion_x;
1475 ✗ s->cur_pic.motion_val[dir][xy + 1][1] = motion_y;
1476 ✗ s->cur_pic.ref_index [dir][b8_xy] =
1477 ✗ s->cur_pic.ref_index [dir][b8_xy + 1] = s->field_select[dir][i];
1478 av_assert2(s->field_select[dir][i] == 0 ||
1479 s->field_select[dir][i] == 1);
1480 }
1481 ✗ xy += wrap;
1482 ✗ b8_xy += 2;
1483 }
1484 }
1485
1486 2608560 s->dest[0] += 16 >> lowres;
1487 2608560 s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
1488 2608560 s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
1489
1490 2608560 ff_mpv_reconstruct_mb(s, s->block);
1491
1492
2/2
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✓ Branch 1 taken 2529220 times.
 2608560 if (++s->mb_x >= s->mb_width) {
1493 79340 const int mb_size = 16 >> s->avctx->lowres;
1494 int left;
1495
1496 79340 ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
1497
1498 79340 s->mb_x = 0;
1499 79340 s->mb_y += 1 << field_pic;
1500
1501
2/2
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✓ Branch 1 taken 74733 times.
 79340 if (s->mb_y >= s->mb_height) {
1502 4607 int left = get_bits_left(&s->gb);
1503 9475 int is_d10 = s->chroma_format == CHROMA_422 &&
1504
2/2
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✓ Branch 1 taken 212 times.
 261 s->pict_type == AV_PICTURE_TYPE_I &&
1505
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 49 avctx->profile == 0 && avctx->level == 5 &&
1506
2/2
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✓ Branch 1 taken 24 times.
 49 s->intra_dc_precision == 2 &&
1507
4/6
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 4893 s->q_scale_type == 1 && s->alternate_scan == 0 &&
1508
1/2
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 25 s->progressive_frame == 0
1509 /* vbv_delay == 0xBBB || 0xE10 */;
1510
1511
4/4
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✓ Branch 2 taken 1449 times.
✓ Branch 3 taken 25 times.
 4607 if (left >= 32 && !is_d10) {
1512 1449 GetBitContext gb = s->gb;
1513 1449 align_get_bits(&gb);
1514
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 1449 times.
 1449 if (show_bits(&gb, 24) == 0x060E2B) {
1515 ✗ av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
1516 ✗ is_d10 = 1;
1517 }
1518
3/4
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✓ Branch 4 taken 1448 times.
 1449 if (left > 32 && show_bits_long(&gb, 32) == 0x201) {
1519 ✗ av_log(avctx, AV_LOG_DEBUG, "skipping m704 alpha (unsupported)\n");
1520 ✗ goto eos;
1521 }
1522 }
1523
1524
3/4
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✓ Branch 2 taken 4305 times.
✓ Branch 3 taken 302 times.
 4607 if (left < 0 ||
1525
1/4
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✗ Branch 4 not taken.
 4305 (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) ||
1526
1/4
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✗ Branch 3 not taken.
 4607 ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
1527 ✗ av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X at %d %d\n",
1528 ✗ left, left>0 ? show_bits(&s->gb, FFMIN(left, 23)) : 0, s->mb_x, s->mb_y);
1529 ✗ return AVERROR_INVALIDDATA;
1530 } else
1531 4607 goto eos;
1532 }
1533 // There are some files out there which are missing the last slice
1534 // in cases where the slice is completely outside the visible
1535 // area, we detect this here instead of running into the end expecting
1536 // more data
1537 74733 left = get_bits_left(&s->gb);
1538
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 74733 if (s->mb_y >= ((s->height + 15) >> 4) &&
1539
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✓ Branch 3 taken 250 times.
 250 !s->progressive_sequence &&
1540 ✗ left <= 25 &&
1541 ✗ left >= 0 &&
1542 ✗ s->mb_skip_run == -1 &&
1543 ✗ (!left || show_bits(&s->gb, left) == 0))
1544 ✗ goto eos;
1545
1546 74733 ff_init_block_index(s);
1547 }
1548
1549 /* skip mb handling */
1550
2/2
✓ Branch 0 taken 2438479 times.
✓ Branch 1 taken 165474 times.
 2603953 if (s->mb_skip_run == -1) {
1551 /* read increment again */
1552 2438479 s->mb_skip_run = 0;
1553 1230 for (;;) {
1554 2439709 int code = get_vlc2(&s->gb, ff_mbincr_vlc,
1555 MBINCR_VLC_BITS, 2);
1556
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2439709 times.
 2439709 if (code < 0) {
1557 ✗ av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n");
1558 ✗ return AVERROR_INVALIDDATA;
1559 }
1560
2/2
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 2439709 if (code >= 33) {
1561
2/2
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✓ Branch 1 taken 122634 times.
 123864 if (code == 33) {
1562 1230 s->mb_skip_run += 33;
1563
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 122634 } else if (code == 35) {
1564
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✓ Branch 4 taken 122634 times.
 122634 if (s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0) {
1565 ✗ av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n");
1566 ✗ return AVERROR_INVALIDDATA;
1567 }
1568 122634 goto eos; /* end of slice */
1569 }
1570 /* otherwise, stuffing, nothing to do */
1571 } else {
1572 2315845 s->mb_skip_run += code;
1573 2315845 break;
1574 }
1575 }
1576
2/2
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✓ Branch 1 taken 2253859 times.
 2315845 if (s->mb_skip_run) {
1577 int i;
1578
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 61986 if (s->pict_type == AV_PICTURE_TYPE_I) {
1579 ✗ av_log(s->avctx, AV_LOG_ERROR,
1580 "skipped MB in I-frame at %d %d\n", s->mb_x, s->mb_y);
1581 ✗ return AVERROR_INVALIDDATA;
1582 }
1583
1584 /* skip mb */
1585 61986 s->mb_intra = 0;
1586
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✓ Branch 0 taken 743832 times.
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 805818 for (i = 0; i < 12; i++)
1587 743832 s->block_last_index[i] = -1;
1588 61986 s->last_dc[0] = s->last_dc[1] = s->last_dc[2] = 128 << s->intra_dc_precision;
1589
2/2
✓ Branch 0 taken 42242 times.
✓ Branch 1 taken 19744 times.
 61986 if (s->picture_structure == PICT_FRAME)
1590 42242 s->mv_type = MV_TYPE_16X16;
1591 else
1592 19744 s->mv_type = MV_TYPE_FIELD;
1593
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✓ Branch 1 taken 38198 times.
 61986 if (s->pict_type == AV_PICTURE_TYPE_P) {
1594 /* if P type, zero motion vector is implied */
1595 23788 s->mv_dir = MV_DIR_FORWARD;
1596 23788 s->mv[0][0][0] = s->mv[0][0][1] = 0;
1597 23788 s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
1598 23788 s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
1599 23788 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1600 } else {
1601 /* if B type, reuse previous vectors and directions */
1602 38198 s->mv[0][0][0] = s->last_mv[0][0][0];
1603 38198 s->mv[0][0][1] = s->last_mv[0][0][1];
1604 38198 s->mv[1][0][0] = s->last_mv[1][0][0];
1605 38198 s->mv[1][0][1] = s->last_mv[1][0][1];
1606 38198 s->field_select[0][0] = (s->picture_structure - 1) & 1;
1607 38198 s->field_select[1][0] = (s->picture_structure - 1) & 1;
1608 }
1609 }
1610 }
1611 }
1612 127241 eos: // end of slice
1613
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 127241 if (get_bits_left(&s->gb) < 0) {
1614 ✗ av_log(s->avctx, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
1615 ✗ return AVERROR_INVALIDDATA;
1616 }
1617 127241 *buf += (get_bits_count(&s->gb) - 1) / 8;
1618 ff_dlog(s->avctx, "Slice start:%d %d end:%d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
1619 127241 return 0;
1620 }
1621
1622 6678 static int slice_decode_thread(AVCodecContext *c, void *arg)
1623 {
1624 6678 MpegEncContext *s = *(void **) arg;
1625 6678 const uint8_t *buf = s->gb.buffer;
1626 6678 int mb_y = s->start_mb_y;
1627 6678 const int field_pic = s->picture_structure != PICT_FRAME;
1628
1629 6678 s->er.error_count = (3 * (s->end_mb_y - s->start_mb_y) * s->mb_width) >> field_pic;
1630
1631 15582 for (;;) {
1632 uint32_t start_code;
1633 int ret;
1634
1635 22260 ret = mpeg_decode_slice(s, mb_y, &buf, s->gb.buffer_end - buf);
1636 22260 emms_c();
1637 ff_dlog(c, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n",
1638 ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
1639 s->start_mb_y, s->end_mb_y, s->er.error_count);
1640
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 22260 if (ret < 0) {
1641 ✗ if (c->err_recognition & AV_EF_EXPLODE)
1642 6678 return ret;
1643 ✗ if (s->resync_mb_x >= 0 && s->resync_mb_y >= 0)
1644 ✗ ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
1645 s->mb_x, s->mb_y,
1646 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
1647 } else {
1648 22260 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
1649 22260 s->mb_x - 1, s->mb_y,
1650 ER_AC_END | ER_DC_END | ER_MV_END);
1651 }
1652
1653
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 22260 if (s->mb_y == s->end_mb_y)
1654 6678 return 0;
1655
1656 15582 start_code = -1;
1657 15582 buf = avpriv_find_start_code(buf, s->gb.buffer_end, &start_code);
1658
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 15582 if (start_code < SLICE_MIN_START_CODE || start_code > SLICE_MAX_START_CODE)
1659 ✗ return AVERROR_INVALIDDATA;
1660 15582 mb_y = start_code - SLICE_MIN_START_CODE;
1661
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 15582 if (s->codec_id != AV_CODEC_ID_MPEG1VIDEO && s->mb_height > 2800/16)
1662 ✗ mb_y += (*buf&0xE0)<<2;
1663 15582 mb_y <<= field_pic;
1664
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 15582 if (s->picture_structure == PICT_BOTTOM_FIELD)
1665 ✗ mb_y++;
1666
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 15582 if (mb_y >= s->end_mb_y)
1667 ✗ return AVERROR_INVALIDDATA;
1668 }
1669 }
1670
1671 /**
1672 * Handle slice ends.
1673 * @return 1 if it seems to be the last slice
1674 */
1675 4190 static int slice_end(AVCodecContext *avctx, AVFrame *pict, int *got_output)
1676 {
1677 4190 Mpeg1Context *s1 = avctx->priv_data;
1678 4190 MpegEncContext *s = &s1->mpeg_enc_ctx;
1679
1680
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 4190 if (!s->context_initialized || !s->cur_pic.ptr)
1681 286 return 0;
1682
1683
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 3904 if (s->avctx->hwaccel) {
1684 ✗ int ret = FF_HW_SIMPLE_CALL(s->avctx, end_frame);
1685 ✗ if (ret < 0) {
1686 ✗ av_log(avctx, AV_LOG_ERROR,
1687 "hardware accelerator failed to decode picture\n");
1688 ✗ return ret;
1689 }
1690 }
1691
1692 /* end of slice reached */
1693
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 3904 if (/* s->mb_y << field_pic == s->mb_height && */ !s->first_field && !s1->first_slice) {
1694 /* end of image */
1695
1696 3903 ff_er_frame_end(&s->er, NULL);
1697
1698 3903 ff_mpv_frame_end(s);
1699
1700
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 3903 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1701 1955 int ret = av_frame_ref(pict, s->cur_pic.ptr->f);
1702
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 1955 if (ret < 0)
1703 ✗ return ret;
1704 1955 ff_print_debug_info(s, s->cur_pic.ptr, pict);
1705 1955 ff_mpv_export_qp_table(s, pict, s->cur_pic.ptr, FF_MPV_QSCALE_TYPE_MPEG2);
1706 1955 *got_output = 1;
1707 } else {
1708 /* latency of 1 frame for I- and P-frames */
1709
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 1948 if (s->last_pic.ptr && !s->last_pic.ptr->dummy) {
1710 1886 int ret = av_frame_ref(pict, s->last_pic.ptr->f);
1711
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 1886 if (ret < 0)
1712 ✗ return ret;
1713 1886 ff_print_debug_info(s, s->last_pic.ptr, pict);
1714 1886 ff_mpv_export_qp_table(s, pict, s->last_pic.ptr, FF_MPV_QSCALE_TYPE_MPEG2);
1715 1886 *got_output = 1;
1716 }
1717 }
1718
1719 3903 return 1;
1720 } else {
1721 1 return 0;
1722 }
1723 }
1724
1725 810 static int mpeg1_decode_sequence(AVCodecContext *avctx,
1726 const uint8_t *buf, int buf_size)
1727 {
1728 810 Mpeg1Context *s1 = avctx->priv_data;
1729 810 MpegEncContext *s = &s1->mpeg_enc_ctx;
1730 int width, height;
1731 int i, v, j;
1732
1733 810 int ret = init_get_bits8(&s->gb, buf, buf_size);
1734
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 810 if (ret < 0)
1735 ✗ return ret;
1736
1737 810 width = get_bits(&s->gb, 12);
1738 810 height = get_bits(&s->gb, 12);
1739
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 810 if (width == 0 || height == 0) {
1740 ✗ av_log(avctx, AV_LOG_WARNING,
1741 "Invalid horizontal or vertical size value.\n");
1742 ✗ if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
1743 ✗ return AVERROR_INVALIDDATA;
1744 }
1745 810 s1->aspect_ratio_info = get_bits(&s->gb, 4);
1746
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 810 if (s1->aspect_ratio_info == 0) {
1747 ✗ av_log(avctx, AV_LOG_ERROR, "aspect ratio has forbidden 0 value\n");
1748 ✗ if (avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_COMPLIANT))
1749 ✗ return AVERROR_INVALIDDATA;
1750 }
1751 810 s1->frame_rate_index = get_bits(&s->gb, 4);
1752
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 810 if (s1->frame_rate_index == 0 || s1->frame_rate_index > 13) {
1753 ✗ av_log(avctx, AV_LOG_WARNING,
1754 "frame_rate_index %d is invalid\n", s1->frame_rate_index);
1755 ✗ s1->frame_rate_index = 1;
1756 }
1757 810 s1->bit_rate = get_bits(&s->gb, 18) * 400;
1758
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 810 if (check_marker(s->avctx, &s->gb, "in sequence header") == 0) {
1759 ✗ return AVERROR_INVALIDDATA;
1760 }
1761
1762 810 s->avctx->rc_buffer_size = get_bits(&s->gb, 10) * 1024 * 16;
1763 810 skip_bits(&s->gb, 1);
1764
1765 /* get matrix */
1766
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 810 if (get_bits1(&s->gb)) {
1767 22 load_matrix(s, s->chroma_intra_matrix, s->intra_matrix, 1);
1768 } else {
1769
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 51220 for (i = 0; i < 64; i++) {
1770 50432 j = s->idsp.idct_permutation[i];
1771 50432 v = ff_mpeg1_default_intra_matrix[i];
1772 50432 s->intra_matrix[j] = v;
1773 50432 s->chroma_intra_matrix[j] = v;
1774 }
1775 }
1776
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 810 if (get_bits1(&s->gb)) {
1777 84 load_matrix(s, s->chroma_inter_matrix, s->inter_matrix, 0);
1778 } else {
1779
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 47190 for (i = 0; i < 64; i++) {
1780 46464 int j = s->idsp.idct_permutation[i];
1781 46464 v = ff_mpeg1_default_non_intra_matrix[i];
1782 46464 s->inter_matrix[j] = v;
1783 46464 s->chroma_inter_matrix[j] = v;
1784 }
1785 }
1786
1787
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 810 if (show_bits(&s->gb, 23) != 0) {
1788 ✗ av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n");
1789 ✗ return AVERROR_INVALIDDATA;
1790 }
1791
1792 810 s->width = width;
1793 810 s->height = height;
1794
1795 /* We set MPEG-2 parameters so that it emulates MPEG-1. */
1796 810 s->progressive_sequence = 1;
1797 810 s->progressive_frame = 1;
1798 810 s->picture_structure = PICT_FRAME;
1799 810 s->first_field = 0;
1800 810 s->frame_pred_frame_dct = 1;
1801 810 s->chroma_format = CHROMA_420;
1802 810 s->codec_id =
1803 810 s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
1804
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 810 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
1805 ✗ s->low_delay = 1;
1806
1807
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 810 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1808 ✗ av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%"PRId64", aspect_ratio_info: %d \n",
1809 ✗ s->avctx->rc_buffer_size, s1->bit_rate, s1->aspect_ratio_info);
1810
1811 810 return 0;
1812 }
1813
1814 2 static int vcr2_init_sequence(AVCodecContext *avctx)
1815 {
1816 2 Mpeg1Context *s1 = avctx->priv_data;
1817 2 MpegEncContext *s = &s1->mpeg_enc_ctx;
1818 int i, v, ret;
1819
1820 /* start new MPEG-1 context decoding */
1821
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 2 if (s->context_initialized)
1822 ✗ ff_mpv_common_end(s);
1823
1824 2 s->width = avctx->coded_width;
1825 2 s->height = avctx->coded_height;
1826 2 avctx->has_b_frames = 0; // true?
1827 2 s->low_delay = 1;
1828
1829 2 avctx->pix_fmt = mpeg_get_pixelformat(avctx);
1830
1831
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 2 if ((ret = ff_mpv_common_init(s)) < 0)
1832 ✗ return ret;
1833
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 2 if (!s->avctx->lowres)
1834
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 4 for (int i = 0; i < s->slice_context_count; i++)
1835 2 ff_mpv_framesize_disable(&s->thread_context[i]->sc);
1836
1837
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 130 for (i = 0; i < 64; i++) {
1838 128 int j = s->idsp.idct_permutation[i];
1839 128 v = ff_mpeg1_default_intra_matrix[i];
1840 128 s->intra_matrix[j] = v;
1841 128 s->chroma_intra_matrix[j] = v;
1842
1843 128 v = ff_mpeg1_default_non_intra_matrix[i];
1844 128 s->inter_matrix[j] = v;
1845 128 s->chroma_inter_matrix[j] = v;
1846 }
1847
1848 2 s->progressive_sequence = 1;
1849 2 s->progressive_frame = 1;
1850 2 s->picture_structure = PICT_FRAME;
1851 2 s->first_field = 0;
1852 2 s->frame_pred_frame_dct = 1;
1853 2 s->chroma_format = CHROMA_420;
1854
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 2 if (s->codec_tag == AV_RL32("BW10")) {
1855 ✗ s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
1856 } else {
1857 2 s->codec_id = s->avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
1858 }
1859 2 s1->save_progressive_seq = s->progressive_sequence;
1860 2 s1->save_chroma_format = s->chroma_format;
1861 2 return 0;
1862 }
1863
1864 758 static void mpeg_set_cc_format(AVCodecContext *avctx, enum Mpeg2ClosedCaptionsFormat format,
1865 const char *label)
1866 {
1867 758 Mpeg1Context *s1 = avctx->priv_data;
1868
1869 av_assert2(format != CC_FORMAT_AUTO);
1870
1871
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 758 if (!s1->cc_format) {
1872 11 s1->cc_format = format;
1873
1874 11 av_log(avctx, AV_LOG_DEBUG, "CC: first seen substream is %s format\n", label);
1875 }
1876
1877 #if FF_API_CODEC_PROPS
1878 FF_DISABLE_DEPRECATION_WARNINGS
1879 758 avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
1880 FF_ENABLE_DEPRECATION_WARNINGS
1881 #endif
1882 758 }
1883
1884 830 static int mpeg_decode_a53_cc(AVCodecContext *avctx,
1885 const uint8_t *p, int buf_size)
1886 {
1887 830 Mpeg1Context *s1 = avctx->priv_data;
1888
1889
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 830 if ((!s1->cc_format || s1->cc_format == CC_FORMAT_A53_PART4) &&
1890 627 buf_size >= 6 &&
1891
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 627 p[0] == 'G' && p[1] == 'A' && p[2] == '9' && p[3] == '4' &&
1892
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 553 p[4] == 3 && (p[5] & 0x40)) {
1893 /* extract A53 Part 4 CC data */
1894 553 int cc_count = p[5] & 0x1f;
1895
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 553 if (cc_count > 0 && buf_size >= 7 + cc_count * 3) {
1896
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 553 int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
1897 553 const uint64_t new_size = (old_size + cc_count
1898 553 * UINT64_C(3));
1899 int ret;
1900
1901
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 553 if (new_size > 3*A53_MAX_CC_COUNT)
1902 ✗ return AVERROR(EINVAL);
1903
1904 553 ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
1905
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 553 if (ret >= 0)
1906 553 memcpy(s1->a53_buf_ref->data + old_size, p + 7, cc_count * UINT64_C(3));
1907
1908 553 mpeg_set_cc_format(avctx, CC_FORMAT_A53_PART4, "A/53 Part 4");
1909 }
1910 553 return 1;
1911
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 277 } else if ((!s1->cc_format || s1->cc_format == CC_FORMAT_SCTE20) &&
1912 277 buf_size >= 2 &&
1913
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 277 p[0] == 0x03 && (p[1]&0x7f) == 0x01) {
1914 /* extract SCTE-20 CC data */
1915 GetBitContext gb;
1916 205 int cc_count = 0;
1917 int i, ret;
1918
1919 205 ret = init_get_bits8(&gb, p + 2, buf_size - 2);
1920
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 205 if (ret < 0)
1921 ✗ return ret;
1922 205 cc_count = get_bits(&gb, 5);
1923
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 205 if (cc_count > 0) {
1924
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 205 int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
1925 205 const uint64_t new_size = (old_size + cc_count
1926 205 * UINT64_C(3));
1927
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 205 if (new_size > 3*A53_MAX_CC_COUNT)
1928 ✗ return AVERROR(EINVAL);
1929
1930 205 ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
1931
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 205 if (ret >= 0) {
1932 uint8_t field, cc1, cc2;
1933 205 uint8_t *cap = s1->a53_buf_ref->data + old_size;
1934
1935 205 memset(cap, 0, cc_count * 3);
1936
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 615 for (i = 0; i < cc_count && get_bits_left(&gb) >= 26; i++) {
1937 410 skip_bits(&gb, 2); // priority
1938 410 field = get_bits(&gb, 2);
1939 410 skip_bits(&gb, 5); // line_offset
1940 410 cc1 = get_bits(&gb, 8);
1941 410 cc2 = get_bits(&gb, 8);
1942 410 skip_bits(&gb, 1); // marker
1943
1944
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 410 if (!field) { // forbidden
1945 ✗ cap[0] = cap[1] = cap[2] = 0x00;
1946 } else {
1947 410 field = (field == 2 ? 1 : 0);
1948
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 410 if (!s1->mpeg_enc_ctx.top_field_first) field = !field;
1949 410 cap[0] = 0x04 | field;
1950 410 cap[1] = ff_reverse[cc1];
1951 410 cap[2] = ff_reverse[cc2];
1952 }
1953 410 cap += 3;
1954 }
1955 }
1956
1957 205 mpeg_set_cc_format(avctx, CC_FORMAT_SCTE20, "SCTE-20");
1958 }
1959 205 return 1;
1960
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 72 } else if ((!s1->cc_format || s1->cc_format == CC_FORMAT_DVD) &&
1961 72 buf_size >= 11 &&
1962
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 72 p[0] == 'C' && p[1] == 'C' && p[2] == 0x01 && p[3] == 0xf8) {
1963 /* extract DVD CC data
1964 *
1965 * uint32_t user_data_start_code 0x000001B2 (big endian)
1966 * uint16_t user_identifier 0x4343 "CC"
1967 * uint8_t user_data_type_code 0x01
1968 * uint8_t caption_block_size 0xF8
1969 * uint8_t
1970 * bit 7 caption_odd_field_first 1=odd field (CC1/CC2) first 0=even field (CC3/CC4) first
1971 * bit 6 caption_filler 0
1972 * bit 5:1 caption_block_count number of caption blocks (pairs of caption words = frames). Most DVDs use 15 per start of GOP.
1973 * bit 0 caption_extra_field_added 1=one additional caption word
1974 *
1975 * struct caption_field_block {
1976 * uint8_t
1977 * bit 7:1 caption_filler 0x7F (all 1s)
1978 * bit 0 caption_field_odd 1=odd field (this is CC1/CC2) 0=even field (this is CC3/CC4)
1979 * uint8_t caption_first_byte
1980 * uint8_t caption_second_byte
1981 * } caption_block[(caption_block_count * 2) + caption_extra_field_added];
1982 *
1983 * Some DVDs encode caption data for both fields with caption_field_odd=1. The only way to decode the fields
1984 * correctly is to start on the field indicated by caption_odd_field_first and count between odd/even fields.
1985 * Don't assume that the first caption word is the odd field. There do exist MPEG files in the wild that start
1986 * on the even field. There also exist DVDs in the wild that encode an odd field count and the
1987 * caption_extra_field_added/caption_odd_field_first bits change per packet to allow that. */
1988 ✗ int cc_count = 0;
1989 int i, ret;
1990 // There is a caption count field in the data, but it is often
1991 // incorrect. So count the number of captions present.
1992 ✗ for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
1993 ✗ cc_count++;
1994 // Transform the DVD format into A53 Part 4 format
1995 ✗ if (cc_count > 0) {
1996 ✗ int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
1997 ✗ const uint64_t new_size = (old_size + cc_count
1998 ✗ * UINT64_C(6));
1999 ✗ if (new_size > 3*A53_MAX_CC_COUNT)
2000 ✗ return AVERROR(EINVAL);
2001
2002 ✗ ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
2003 ✗ if (ret >= 0) {
2004 ✗ uint8_t field1 = !!(p[4] & 0x80);
2005 ✗ uint8_t *cap = s1->a53_buf_ref->data + old_size;
2006 ✗ p += 5;
2007 ✗ for (i = 0; i < cc_count; i++) {
2008 ✗ cap[0] = (p[0] == 0xff && field1) ? 0xfc : 0xfd;
2009 ✗ cap[1] = p[1];
2010 ✗ cap[2] = p[2];
2011 ✗ cap[3] = (p[3] == 0xff && !field1) ? 0xfc : 0xfd;
2012 ✗ cap[4] = p[4];
2013 ✗ cap[5] = p[5];
2014 ✗ cap += 6;
2015 ✗ p += 6;
2016 }
2017 }
2018
2019 ✗ mpeg_set_cc_format(avctx, CC_FORMAT_DVD, "DVD");
2020 }
2021 ✗ return 1;
2022
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 72 } else if ((!s1->cc_format || s1->cc_format == CC_FORMAT_DISH) &&
2023 72 buf_size >= 12 &&
2024
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 72 p[0] == 0x05 && p[1] == 0x02) {
2025 /* extract Dish Network CC data */
2026 ✗ const uint8_t cc_header = 0xf8 | 0x04 /* valid */ | 0x00 /* line 21 field 1 */;
2027 ✗ uint8_t cc_data[4] = {0};
2028 ✗ int cc_count = 0;
2029 ✗ uint8_t cc_type = p[7];
2030 ✗ p += 8;
2031 ✗ buf_size -= 8;
2032
2033 ✗ if (cc_type == 0x05 && buf_size >= 7) {
2034 ✗ cc_type = p[6];
2035 ✗ p += 7;
2036 ✗ buf_size -= 7;
2037 }
2038
2039 ✗ if (cc_type == 0x02 && buf_size >= 4) { /* 2-byte caption, can be repeated */
2040 ✗ cc_count = 1;
2041 ✗ cc_data[0] = p[1];
2042 ✗ cc_data[1] = p[2];
2043 ✗ cc_type = p[3];
2044
2045 /* Only repeat characters when the next type flag
2046 * is 0x04 and the characters are repeatable (i.e., less than
2047 * 32 with the parity stripped).
2048 */
2049 ✗ if (cc_type == 0x04 && (cc_data[0] & 0x7f) < 32) {
2050 ✗ cc_count = 2;
2051 ✗ cc_data[2] = cc_data[0];
2052 ✗ cc_data[3] = cc_data[1];
2053 }
2054 ✗ } else if (cc_type == 0x04 && buf_size >= 5) { /* 4-byte caption, not repeated */
2055 ✗ cc_count = 2;
2056 ✗ cc_data[0] = p[1];
2057 ✗ cc_data[1] = p[2];
2058 ✗ cc_data[2] = p[3];
2059 ✗ cc_data[3] = p[4];
2060 }
2061
2062 ✗ if (cc_count > 0) {
2063 int ret;
2064 ✗ int old_size = s1->a53_buf_ref ? s1->a53_buf_ref->size : 0;
2065 ✗ const uint64_t new_size = (old_size + cc_count * UINT64_C(3));
2066 ✗ if (new_size > 3 * A53_MAX_CC_COUNT)
2067 ✗ return AVERROR(EINVAL);
2068
2069 ✗ ret = av_buffer_realloc(&s1->a53_buf_ref, new_size);
2070 ✗ if (ret >= 0) {
2071 ✗ uint8_t *cap = s1->a53_buf_ref->data + old_size;
2072 ✗ cap[0] = cc_header;
2073 ✗ cap[1] = cc_data[0];
2074 ✗ cap[2] = cc_data[1];
2075 ✗ if (cc_count == 2) {
2076 ✗ cap[3] = cc_header;
2077 ✗ cap[4] = cc_data[2];
2078 ✗ cap[5] = cc_data[3];
2079 }
2080 }
2081
2082 ✗ mpeg_set_cc_format(avctx, CC_FORMAT_DISH, "Dish Network");
2083 }
2084 ✗ return 1;
2085 }
2086 72 return 0;
2087 }
2088
2089 1037 static void mpeg_decode_user_data(AVCodecContext *avctx,
2090 const uint8_t *p, int buf_size)
2091 {
2092 1037 Mpeg1Context *s = avctx->priv_data;
2093 1037 const uint8_t *buf_end = p + buf_size;
2094 1037 Mpeg1Context *s1 = avctx->priv_data;
2095
2096 #if 0
2097 int i;
2098 for(i=0; !(!p[i-2] && !p[i-1] && p[i]==1) && i<buf_size; i++){
2099 av_log(avctx, AV_LOG_ERROR, "%c", p[i]);
2100 }
2101 av_log(avctx, AV_LOG_ERROR, "\n");
2102 #endif
2103
2104
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 1037 if (buf_size > 29){
2105 int i;
2106
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 21777 for(i=0; i<20; i++)
2107
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 20740 if (!memcmp(p+i, "\0TMPGEXS\0", 9)){
2108 ✗ s->tmpgexs= 1;
2109 }
2110 }
2111 /* we parse the DTG active format information */
2112
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 1037 if (buf_end - p >= 5 &&
2113
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 1244 p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
2114 207 int flags = p[4];
2115 207 p += 5;
2116
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 207 if (flags & 0x80) {
2117 /* skip event id */
2118 ✗ p += 2;
2119 }
2120
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 207 if (flags & 0x40) {
2121
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 207 if (buf_end - p < 1)
2122 ✗ return;
2123 207 s1->has_afd = 1;
2124 207 s1->afd = p[0] & 0x0f;
2125 }
2126
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 830 } else if (buf_end - p >= 6 &&
2127
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 830 p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
2128 ✗ p[4] == 0x03) { // S3D_video_format_length
2129 // the 0x7F mask ignores the reserved_bit value
2130 ✗ const uint8_t S3D_video_format_type = p[5] & 0x7F;
2131
2132 ✗ if (S3D_video_format_type == 0x03 ||
2133 ✗ S3D_video_format_type == 0x04 ||
2134 ✗ S3D_video_format_type == 0x08 ||
2135 S3D_video_format_type == 0x23) {
2136
2137 ✗ s1->has_stereo3d = 1;
2138
2139 ✗ switch (S3D_video_format_type) {
2140 ✗ case 0x03:
2141 ✗ s1->stereo3d_type = AV_STEREO3D_SIDEBYSIDE;
2142 ✗ break;
2143 ✗ case 0x04:
2144 ✗ s1->stereo3d_type = AV_STEREO3D_TOPBOTTOM;
2145 ✗ break;
2146 ✗ case 0x08:
2147 ✗ s1->stereo3d_type = AV_STEREO3D_2D;
2148 ✗ break;
2149 ✗ case 0x23:
2150 ✗ s1->stereo3d_type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
2151 ✗ break;
2152 }
2153 }
2154
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 830 } else if (mpeg_decode_a53_cc(avctx, p, buf_size)) {
2155 758 return;
2156 }
2157 }
2158
2159 561 static int mpeg_decode_gop(AVCodecContext *avctx,
2160 const uint8_t *buf, int buf_size)
2161 {
2162 561 Mpeg1Context *s1 = avctx->priv_data;
2163 561 MpegEncContext *s = &s1->mpeg_enc_ctx;
2164 int broken_link;
2165 int64_t tc;
2166
2167 561 int ret = init_get_bits8(&s->gb, buf, buf_size);
2168
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 561 if (ret < 0)
2169 ✗ return ret;
2170
2171 561 tc = s1->timecode_frame_start = get_bits(&s->gb, 25);
2172
2173 561 s1->closed_gop = get_bits1(&s->gb);
2174 /* broken_link indicates that after editing the
2175 * reference frames of the first B-Frames after GOP I-Frame
2176 * are missing (open gop) */
2177 561 broken_link = get_bits1(&s->gb);
2178
2179
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 561 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
2180 char tcbuf[AV_TIMECODE_STR_SIZE];
2181 ✗ av_timecode_make_mpeg_tc_string(tcbuf, tc);
2182 ✗ av_log(s->avctx, AV_LOG_DEBUG,
2183 "GOP (%s) closed_gop=%d broken_link=%d\n",
2184 tcbuf, s1->closed_gop, broken_link);
2185 }
2186
2187 561 return 0;
2188 }
2189
2190 4190 static void mpeg12_execute_slice_threads(AVCodecContext *avctx,
2191 Mpeg1Context *const s)
2192 {
2193
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 4190 if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_SLICE) &&
2194
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 747 !avctx->hwaccel) {
2195 747 MpegEncContext *const s2 = &s->mpeg_enc_ctx;
2196 747 int error_count = 0;
2197
2198 747 avctx->execute(avctx, slice_decode_thread,
2199 747 s2->thread_context, NULL,
2200 s->slice_count, sizeof(void *));
2201
2202
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 7425 for (int i = 0; i < s->slice_count; i++) {
2203 6678 MpegEncContext *const slice = s2->thread_context[i];
2204 6678 int slice_err = atomic_load_explicit(&slice->er.error_count,
2205 memory_order_relaxed);
2206 // error_count can get set to INT_MAX on serious errors.
2207 // So use saturated addition.
2208
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 6678 if ((unsigned)slice_err > INT_MAX - error_count) {
2209 ✗ error_count = INT_MAX;
2210 ✗ break;
2211 }
2212 6678 error_count += slice_err;
2213 }
2214 747 atomic_store_explicit(&s2->er.error_count, error_count,
2215 memory_order_relaxed);
2216 }
2217 4190 }
2218
2219 4679 static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
2220 int *got_output, const uint8_t *buf, int buf_size)
2221 {
2222 4679 Mpeg1Context *s = avctx->priv_data;
2223 4679 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2224 4679 const uint8_t *buf_ptr = buf;
2225 4679 const uint8_t *buf_end = buf + buf_size;
2226 int ret, input_size;
2227 4679 int last_code = 0, skip_frame = 0;
2228 4679 int picture_start_code_seen = 0;
2229
2230 224444 for (;;) {
2231 /* find next start code */
2232 229123 uint32_t start_code = -1;
2233 229123 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &start_code);
2234
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 229123 if (start_code > 0x1ff) {
2235
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 4509 if (!skip_frame) {
2236 4190 mpeg12_execute_slice_threads(avctx, s);
2237
2238 4190 ret = slice_end(avctx, picture, got_output);
2239
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 4190 if (ret < 0)
2240 4679 return ret;
2241 }
2242 4509 s2->pict_type = 0;
2243
2244
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 4509 if (avctx->err_recognition & AV_EF_EXPLODE && s2->er.error_count)
2245 ✗ return AVERROR_INVALIDDATA;
2246
2247 4509 return FFMAX(0, buf_ptr - buf);
2248 }
2249
2250 224614 input_size = buf_end - buf_ptr;
2251
2252
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 224614 if (avctx->debug & FF_DEBUG_STARTCODE)
2253 ✗ av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
2254 start_code, buf_ptr - buf, input_size);
2255
2256 /* prepare data for next start code */
2257
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 224614 switch (start_code) {
2258 810 case SEQ_START_CODE:
2259
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 810 if (last_code == 0) {
2260 810 mpeg1_decode_sequence(avctx, buf_ptr, input_size);
2261
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 810 if (buf != avctx->extradata)
2262 552 s->sync = 1;
2263 } else {
2264 ✗ av_log(avctx, AV_LOG_ERROR,
2265 "ignoring SEQ_START_CODE after %X\n", last_code);
2266 ✗ if (avctx->err_recognition & AV_EF_EXPLODE)
2267 ✗ return AVERROR_INVALIDDATA;
2268 }
2269 810 break;
2270
2271 5232 case PICTURE_START_CODE:
2272
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 5232 if (picture_start_code_seen && s2->picture_structure == PICT_FRAME) {
2273 /* If it's a frame picture, there can't be more than one picture header.
2274 Yet, it does happen and we need to handle it. */
2275 ✗ av_log(avctx, AV_LOG_WARNING, "ignoring extra picture following a frame-picture\n");
2276 ✗ break;
2277 }
2278 5232 picture_start_code_seen = 1;
2279
2280
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 5232 if (buf == avctx->extradata && avctx->codec_tag == AV_RL32("AVmp")) {
2281 ✗ av_log(avctx, AV_LOG_WARNING, "ignoring picture start code in AVmp extradata\n");
2282 ✗ break;
2283 }
2284
2285
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 5232 if (s2->width <= 0 || s2->height <= 0) {
2286 170 av_log(avctx, AV_LOG_ERROR, "Invalid frame dimensions %dx%d.\n",
2287 s2->width, s2->height);
2288 170 return AVERROR_INVALIDDATA;
2289 }
2290
2291
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 5062 if (s->tmpgexs){
2292 ✗ s2->intra_dc_precision= 3;
2293 ✗ s2->intra_matrix[0]= 1;
2294 }
2295
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 5062 if (s->slice_count) {
2296 ✗ mpeg12_execute_slice_threads(avctx, s);
2297 ✗ s->slice_count = 0;
2298 }
2299
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 5062 if (last_code == 0 || last_code == SLICE_MIN_START_CODE) {
2300 5062 ret = mpeg_decode_postinit(avctx);
2301
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 5062 if (ret < 0) {
2302 ✗ av_log(avctx, AV_LOG_ERROR,
2303 "mpeg_decode_postinit() failure\n");
2304 ✗ return ret;
2305 }
2306
2307 /* We have a complete image: we try to decompress it. */
2308
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 5062 if (mpeg1_decode_picture(avctx, buf_ptr, input_size) < 0)
2309 ✗ s2->pict_type = 0;
2310 5062 s->first_slice = 1;
2311 5062 last_code = PICTURE_START_CODE;
2312 } else {
2313 ✗ av_log(avctx, AV_LOG_ERROR,
2314 "ignoring pic after %X\n", last_code);
2315 ✗ if (avctx->err_recognition & AV_EF_EXPLODE)
2316 ✗ return AVERROR_INVALIDDATA;
2317 }
2318 5062 break;
2319 6393 case EXT_START_CODE:
2320 6393 ret = init_get_bits8(&s2->gb, buf_ptr, input_size);
2321
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 6393 if (ret < 0)
2322 ✗ return ret;
2323
2324
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 6393 switch (get_bits(&s2->gb, 4)) {
2325 718 case 0x1:
2326
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 718 if (last_code == 0) {
2327 718 mpeg_decode_sequence_extension(s);
2328 } else {
2329 ✗ av_log(avctx, AV_LOG_ERROR,
2330 "ignoring seq ext after %X\n", last_code);
2331 ✗ if (avctx->err_recognition & AV_EF_EXPLODE)
2332 ✗ return AVERROR_INVALIDDATA;
2333 }
2334 718 break;
2335 95 case 0x2:
2336 95 mpeg_decode_sequence_display_extension(s);
2337 95 break;
2338 985 case 0x3:
2339 985 mpeg_decode_quant_matrix_extension(s2);
2340 985 break;
2341 27 case 0x7:
2342 27 mpeg_decode_picture_display_extension(s);
2343 27 break;
2344 4568 case 0x8:
2345
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 4568 if (last_code == PICTURE_START_CODE) {
2346 4568 int ret = mpeg_decode_picture_coding_extension(s);
2347
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 4568 if (ret < 0)
2348 ✗ return ret;
2349 } else {
2350 ✗ av_log(avctx, AV_LOG_ERROR,
2351 "ignoring pic cod ext after %X\n", last_code);
2352 ✗ if (avctx->err_recognition & AV_EF_EXPLODE)
2353 ✗ return AVERROR_INVALIDDATA;
2354 }
2355 4568 break;
2356 }
2357 6393 break;
2358 1037 case USER_START_CODE:
2359 1037 mpeg_decode_user_data(avctx, buf_ptr, input_size);
2360 1037 break;
2361 561 case GOP_START_CODE:
2362
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✗ Branch 1 not taken.
 561 if (last_code == 0) {
2363 561 s2->first_field = 0;
2364 561 ret = mpeg_decode_gop(avctx, buf_ptr, input_size);
2365
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 561 if (ret < 0)
2366 ✗ return ret;
2367 561 s->sync = 1;
2368 } else {
2369 ✗ av_log(avctx, AV_LOG_ERROR,
2370 "ignoring GOP_START_CODE after %X\n", last_code);
2371 ✗ if (avctx->err_recognition & AV_EF_EXPLODE)
2372 ✗ return AVERROR_INVALIDDATA;
2373 }
2374 561 break;
2375 210581 default:
2376
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 210581 if (start_code >= SLICE_MIN_START_CODE &&
2377
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 209675 start_code <= SLICE_MAX_START_CODE && last_code == PICTURE_START_CODE) {
2378
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 5062 if (s2->progressive_sequence && !s2->progressive_frame) {
2379 ✗ s2->progressive_frame = 1;
2380 ✗ av_log(s2->avctx, AV_LOG_ERROR,
2381 "interlaced frame in progressive sequence, ignoring\n");
2382 }
2383
2384
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 5062 if (s2->picture_structure == 0 ||
2385
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 5062 (s2->progressive_frame && s2->picture_structure != PICT_FRAME)) {
2386 ✗ av_log(s2->avctx, AV_LOG_ERROR,
2387 "picture_structure %d invalid, ignoring\n",
2388 s2->picture_structure);
2389 ✗ s2->picture_structure = PICT_FRAME;
2390 }
2391
2392
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 5062 if (s2->progressive_sequence && !s2->frame_pred_frame_dct)
2393 ✗ av_log(s2->avctx, AV_LOG_WARNING, "invalid frame_pred_frame_dct\n");
2394
2395
2/2
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 5062 if (s2->picture_structure == PICT_FRAME) {
2396 3382 s2->first_field = 0;
2397 3382 s2->v_edge_pos = 16 * s2->mb_height;
2398 } else {
2399 1680 s2->first_field ^= 1;
2400 1680 s2->v_edge_pos = 8 * s2->mb_height;
2401 1680 memset(s2->mbskip_table, 0, s2->mb_stride * s2->mb_height);
2402 }
2403 }
2404
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 210581 if (start_code >= SLICE_MIN_START_CODE &&
2405
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 209675 start_code <= SLICE_MAX_START_CODE && last_code != 0) {
2406 209500 const int field_pic = s2->picture_structure != PICT_FRAME;
2407 209500 int mb_y = start_code - SLICE_MIN_START_CODE;
2408 209500 last_code = SLICE_MIN_START_CODE;
2409
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 209500 if (s2->codec_id != AV_CODEC_ID_MPEG1VIDEO && s2->mb_height > 2800/16)
2410 ✗ mb_y += (*buf_ptr&0xE0)<<2;
2411
2412 209500 mb_y <<= field_pic;
2413
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 209500 if (s2->picture_structure == PICT_BOTTOM_FIELD)
2414 13745 mb_y++;
2415
2416
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 209500 if (buf_end - buf_ptr < 2) {
2417 ✗ av_log(s2->avctx, AV_LOG_ERROR, "slice too small\n");
2418 ✗ return AVERROR_INVALIDDATA;
2419 }
2420
2421
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 209500 if (mb_y >= s2->mb_height) {
2422 ✗ av_log(s2->avctx, AV_LOG_ERROR,
2423 "slice below image (%d >= %d)\n", mb_y, s2->mb_height);
2424 ✗ return AVERROR_INVALIDDATA;
2425 }
2426
2427
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 209500 if (!s2->last_pic.ptr) {
2428 /* Skip B-frames if we do not have reference frames and
2429 * GOP is not closed. */
2430
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 85820 if (s2->pict_type == AV_PICTURE_TYPE_B) {
2431
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 732 if (!s->closed_gop) {
2432 732 skip_frame = 1;
2433 732 av_log(s2->avctx, AV_LOG_DEBUG,
2434 "Skipping B slice due to open GOP\n");
2435 732 break;
2436 }
2437 }
2438 }
2439
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 208768 if (s2->pict_type == AV_PICTURE_TYPE_I || (s2->avctx->flags2 & AV_CODEC_FLAG2_SHOW_ALL))
2440 127739 s->sync = 1;
2441
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 208768 if (!s2->next_pic.ptr) {
2442 /* Skip P-frames if we do not have a reference frame or
2443 * we have an invalid header. */
2444
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 81593 if (s2->pict_type == AV_PICTURE_TYPE_P && !s->sync) {
2445 4032 skip_frame = 1;
2446 4032 av_log(s2->avctx, AV_LOG_DEBUG,
2447 "Skipping P slice due to !sync\n");
2448 4032 break;
2449 }
2450 }
2451
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 204736 if ((avctx->skip_frame >= AVDISCARD_NONREF &&
2452
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 77485 s2->pict_type == AV_PICTURE_TYPE_B) ||
2453
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 204736 (avctx->skip_frame >= AVDISCARD_NONKEY &&
2454
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 77485 s2->pict_type != AV_PICTURE_TYPE_I) ||
2455
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 203824 avctx->skip_frame >= AVDISCARD_ALL) {
2456 77485 skip_frame = 1;
2457 77485 break;
2458 }
2459
2460
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 127251 if (!s2->context_initialized)
2461 ✗ break;
2462
2463
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 127251 if (s2->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
2464
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 119978 if (mb_y < avctx->skip_top ||
2465
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 119978 mb_y >= s2->mb_height - avctx->skip_bottom)
2466 break;
2467 }
2468
2469
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 127251 if (!s2->pict_type) {
2470 ✗ av_log(avctx, AV_LOG_ERROR, "Missing picture start code\n");
2471 ✗ if (avctx->err_recognition & AV_EF_EXPLODE)
2472 ✗ return AVERROR_INVALIDDATA;
2473 ✗ break;
2474 }
2475
2476
2/2
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 127251 if (s->first_slice) {
2477 4617 skip_frame = 0;
2478 4617 s->first_slice = 0;
2479
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 4617 if ((ret = mpeg_field_start(s, buf, buf_size)) < 0)
2480 ✗ return ret;
2481 }
2482
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 127251 if (!s2->cur_pic.ptr) {
2483 ✗ av_log(avctx, AV_LOG_ERROR,
2484 "current_picture not initialized\n");
2485 ✗ return AVERROR_INVALIDDATA;
2486 }
2487
2488 127251 if (HAVE_THREADS &&
2489
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 127251 (avctx->active_thread_type & FF_THREAD_SLICE) &&
2490
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 22260 !avctx->hwaccel) {
2491 22260 int threshold = (s2->mb_height * s->slice_count +
2492 22260 s2->slice_context_count / 2) /
2493 22260 s2->slice_context_count;
2494
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 22260 if (threshold <= mb_y) {
2495 6678 MpegEncContext *thread_context = s2->thread_context[s->slice_count];
2496
2497 6678 thread_context->start_mb_y = mb_y;
2498 6678 thread_context->end_mb_y = s2->mb_height;
2499
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 6678 if (s->slice_count) {
2500 5936 s2->thread_context[s->slice_count - 1]->end_mb_y = mb_y;
2501 5936 ret = ff_update_duplicate_context(thread_context, s2);
2502
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 5936 if (ret < 0)
2503 ✗ return ret;
2504 }
2505 6678 ret = init_get_bits8(&thread_context->gb, buf_ptr, input_size);
2506
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 6678 if (ret < 0)
2507 ✗ return ret;
2508 6678 s->slice_count++;
2509 }
2510 22260 buf_ptr += 2; // FIXME add minimum number of bytes per slice
2511 } else {
2512 104991 ret = mpeg_decode_slice(s2, mb_y, &buf_ptr, input_size);
2513 104991 emms_c();
2514
2515
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 104991 if (ret < 0) {
2516
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 10 if (avctx->err_recognition & AV_EF_EXPLODE)
2517 ✗ return ret;
2518
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 10 if (s2->resync_mb_x >= 0 && s2->resync_mb_y >= 0)
2519 10 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2520 s2->resync_mb_y, s2->mb_x, s2->mb_y,
2521 ER_AC_ERROR | ER_DC_ERROR | ER_MV_ERROR);
2522 } else {
2523 104981 ff_er_add_slice(&s2->er, s2->resync_mb_x,
2524 104981 s2->resync_mb_y, s2->mb_x - 1, s2->mb_y,
2525 ER_AC_END | ER_DC_END | ER_MV_END);
2526 }
2527 }
2528 }
2529 128332 break;
2530 }
2531 }
2532 }
2533
2534 4561 static int mpeg_decode_frame(AVCodecContext *avctx, AVFrame *picture,
2535 int *got_output, AVPacket *avpkt)
2536 {
2537 4561 const uint8_t *buf = avpkt->data;
2538 int ret;
2539 4561 int buf_size = avpkt->size;
2540 4561 Mpeg1Context *s = avctx->priv_data;
2541 4561 MpegEncContext *s2 = &s->mpeg_enc_ctx;
2542
2543
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 4561 if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
2544 /* special case for last picture */
2545
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 140 if (s2->low_delay == 0 && s2->next_pic.ptr) {
2546 61 int ret = av_frame_ref(picture, s2->next_pic.ptr->f);
2547
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 61 if (ret < 0)
2548 ✗ return ret;
2549
2550 61 ff_mpv_unref_picture(&s2->next_pic);
2551
2552 61 *got_output = 1;
2553 }
2554 140 return buf_size;
2555 }
2556
2557
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 4421 if (!s2->context_initialized &&
2558
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 459 (s2->codec_tag == AV_RL32("VCR2") || s2->codec_tag == AV_RL32("BW10")))
2559 2 vcr2_init_sequence(avctx);
2560
2561 4421 s->slice_count = 0;
2562
2563
4/4
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✓ Branch 3 taken 3770 times.
 4421 if (avctx->extradata && !s->extradata_decoded) {
2564 258 ret = decode_chunks(avctx, picture, got_output,
2565 258 avctx->extradata, avctx->extradata_size);
2566
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 258 if (*got_output) {
2567 ✗ av_log(avctx, AV_LOG_ERROR, "picture in extradata\n");
2568 ✗ av_frame_unref(picture);
2569 ✗ *got_output = 0;
2570 }
2571 258 s->extradata_decoded = 1;
2572
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 258 if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) {
2573 ✗ ff_mpv_unref_picture(&s2->cur_pic);
2574 ✗ return ret;
2575 }
2576 }
2577
2578 4421 ret = decode_chunks(avctx, picture, got_output, buf, buf_size);
2579
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✓ Branch 3 taken 410 times.
 4421 if (ret<0 || *got_output) {
2580 4011 ff_mpv_unref_picture(&s2->cur_pic);
2581
2582
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 4011 if (s->timecode_frame_start != -1 && *got_output) {
2583 char tcbuf[AV_TIMECODE_STR_SIZE];
2584 375 AVFrameSideData *tcside = av_frame_new_side_data(picture,
2585 AV_FRAME_DATA_GOP_TIMECODE,
2586 sizeof(int64_t));
2587
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 375 if (!tcside)
2588 ✗ return AVERROR(ENOMEM);
2589 375 memcpy(tcside->data, &s->timecode_frame_start, sizeof(int64_t));
2590
2591 375 av_timecode_make_mpeg_tc_string(tcbuf, s->timecode_frame_start);
2592 375 av_dict_set(&picture->metadata, "timecode", tcbuf, 0);
2593
2594 375 s->timecode_frame_start = -1;
2595 }
2596 }
2597
2598 4421 return ret;
2599 }
2600
2601 ✗ static av_cold void flush(AVCodecContext *avctx)
2602 {
2603 ✗ Mpeg1Context *s = avctx->priv_data;
2604
2605 ✗ s->sync = 0;
2606 ✗ s->closed_gop = 0;
2607
2608 ✗ av_buffer_unref(&s->a53_buf_ref);
2609 ✗ ff_mpeg_flush(avctx);
2610 ✗ }
2611
2612 288 static av_cold int mpeg_decode_end(AVCodecContext *avctx)
2613 {
2614 288 Mpeg1Context *s = avctx->priv_data;
2615
2616 288 av_buffer_unref(&s->a53_buf_ref);
2617 288 return ff_mpv_decode_close(avctx);
2618 }
2619
2620 const FFCodec ff_mpeg1video_decoder = {
2621 .p.name = "mpeg1video",
2622 CODEC_LONG_NAME("MPEG-1 video"),
2623 .p.type = AVMEDIA_TYPE_VIDEO,
2624 .p.id = AV_CODEC_ID_MPEG1VIDEO,
2625 .priv_data_size = sizeof(Mpeg1Context),
2626 .init = mpeg_decode_init,
2627 .close = mpeg_decode_end,
2628 FF_CODEC_DECODE_CB(mpeg_decode_frame),
2629 .p.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2630 AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
2631 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2632 .flush = flush,
2633 .p.max_lowres = 3,
2634 .hw_configs = (const AVCodecHWConfigInternal *const []) {
2635 #if CONFIG_MPEG1_NVDEC_HWACCEL
2636 HWACCEL_NVDEC(mpeg1),
2637 #endif
2638 #if CONFIG_MPEG1_VDPAU_HWACCEL
2639 HWACCEL_VDPAU(mpeg1),
2640 #endif
2641 #if CONFIG_MPEG1_VIDEOTOOLBOX_HWACCEL
2642 HWACCEL_VIDEOTOOLBOX(mpeg1),
2643 #endif
2644 NULL
2645 },
2646 };
2647
2648 #define M2V_OFFSET(x) offsetof(Mpeg1Context, x)
2649 #define M2V_PARAM AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
2650
2651 static const AVOption mpeg2video_options[] = {
2652 { "cc_format", "extract a specific Closed Captions format",
2653 M2V_OFFSET(cc_format), AV_OPT_TYPE_INT, { .i64 = CC_FORMAT_AUTO },
2654 CC_FORMAT_AUTO, CC_FORMAT_DISH, M2V_PARAM, .unit = "cc_format" },
2655
2656 { "auto", "pick first seen CC substream", 0, AV_OPT_TYPE_CONST,
2657 { .i64 = CC_FORMAT_AUTO }, .flags = M2V_PARAM, .unit = "cc_format" },
2658 { "a53", "pick A/53 Part 4 CC substream", 0, AV_OPT_TYPE_CONST,
2659 { .i64 = CC_FORMAT_A53_PART4 }, .flags = M2V_PARAM, .unit = "cc_format" },
2660 { "scte20", "pick SCTE-20 CC substream", 0, AV_OPT_TYPE_CONST,
2661 { .i64 = CC_FORMAT_SCTE20 }, .flags = M2V_PARAM, .unit = "cc_format" },
2662 { "dvd", "pick DVD CC substream", 0, AV_OPT_TYPE_CONST,
2663 { .i64 = CC_FORMAT_DVD }, .flags = M2V_PARAM, .unit = "cc_format" },
2664 { "dish", "pick Dish Network CC substream", 0, AV_OPT_TYPE_CONST,
2665 { .i64 = CC_FORMAT_DISH }, .flags = M2V_PARAM, .unit = "cc_format" },
2666 { NULL }
2667 };
2668
2669 static const AVClass mpeg2video_class = {
2670 .class_name = "MPEG-2 video",
2671 .item_name = av_default_item_name,
2672 .option = mpeg2video_options,
2673 .version = LIBAVUTIL_VERSION_INT,
2674 .category = AV_CLASS_CATEGORY_DECODER,
2675 };
2676
2677 const FFCodec ff_mpeg2video_decoder = {
2678 .p.name = "mpeg2video",
2679 CODEC_LONG_NAME("MPEG-2 video"),
2680 .p.type = AVMEDIA_TYPE_VIDEO,
2681 .p.id = AV_CODEC_ID_MPEG2VIDEO,
2682 .p.priv_class = &mpeg2video_class,
2683 .priv_data_size = sizeof(Mpeg1Context),
2684 .init = mpeg_decode_init,
2685 .close = mpeg_decode_end,
2686 FF_CODEC_DECODE_CB(mpeg_decode_frame),
2687 .p.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2688 AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
2689 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2690 .flush = flush,
2691 .p.max_lowres = 3,
2692 .p.profiles = NULL_IF_CONFIG_SMALL(ff_mpeg2_video_profiles),
2693 .hw_configs = (const AVCodecHWConfigInternal *const []) {
2694 #if CONFIG_MPEG2_DXVA2_HWACCEL
2695 HWACCEL_DXVA2(mpeg2),
2696 #endif
2697 #if CONFIG_MPEG2_D3D11VA_HWACCEL
2698 HWACCEL_D3D11VA(mpeg2),
2699 #endif
2700 #if CONFIG_MPEG2_D3D11VA2_HWACCEL
2701 HWACCEL_D3D11VA2(mpeg2),
2702 #endif
2703 #if CONFIG_MPEG2_D3D12VA_HWACCEL
2704 HWACCEL_D3D12VA(mpeg2),
2705 #endif
2706 #if CONFIG_MPEG2_NVDEC_HWACCEL
2707 HWACCEL_NVDEC(mpeg2),
2708 #endif
2709 #if CONFIG_MPEG2_VAAPI_HWACCEL
2710 HWACCEL_VAAPI(mpeg2),
2711 #endif
2712 #if CONFIG_MPEG2_VDPAU_HWACCEL
2713 HWACCEL_VDPAU(mpeg2),
2714 #endif
2715 #if CONFIG_MPEG2_VIDEOTOOLBOX_HWACCEL
2716 HWACCEL_VIDEOTOOLBOX(mpeg2),
2717 #endif
2718 NULL
2719 },
2720 };
2721
2722 //legacy decoder
2723 const FFCodec ff_mpegvideo_decoder = {
2724 .p.name = "mpegvideo",
2725 CODEC_LONG_NAME("MPEG-1 video"),
2726 .p.type = AVMEDIA_TYPE_VIDEO,
2727 .p.id = AV_CODEC_ID_MPEG2VIDEO,
2728 .priv_data_size = sizeof(Mpeg1Context),
2729 .init = mpeg_decode_init,
2730 .close = mpeg_decode_end,
2731 FF_CODEC_DECODE_CB(mpeg_decode_frame),
2732 .p.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
2733 AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
2734 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
2735 .flush = flush,
2736 .p.max_lowres = 3,
2737 };
2738
2739 typedef struct IPUContext {
2740 MpegEncContext m;
2741
2742 int flags;
2743 DECLARE_ALIGNED(32, int16_t, block)[6][64];
2744 } IPUContext;
2745
2746 ✗ static int ipu_decode_frame(AVCodecContext *avctx, AVFrame *frame,
2747 int *got_frame, AVPacket *avpkt)
2748 {
2749 ✗ IPUContext *s = avctx->priv_data;
2750 ✗ MpegEncContext *m = &s->m;
2751 ✗ GetBitContext *gb = &m->gb;
2752 int ret;
2753
2754 // Check for minimal intra MB size (considering mb header, luma & chroma dc VLC, ac EOB VLC)
2755 ✗ if (avpkt->size*8LL < (avctx->width+15)/16 * ((avctx->height+15)/16) * (2LL + 3*4 + 2*2 + 2*6))
2756 ✗ return AVERROR_INVALIDDATA;
2757
2758 ✗ ret = ff_get_buffer(avctx, frame, 0);
2759 ✗ if (ret < 0)
2760 ✗ return ret;
2761
2762 ✗ ret = init_get_bits8(gb, avpkt->data, avpkt->size);
2763 ✗ if (ret < 0)
2764 ✗ return ret;
2765
2766 ✗ s->flags = get_bits(gb, 8);
2767 ✗ m->intra_dc_precision = s->flags & 3;
2768 ✗ m->q_scale_type = !!(s->flags & 0x40);
2769 ✗ m->intra_vlc_format = !!(s->flags & 0x20);
2770 ✗ m->alternate_scan = !!(s->flags & 0x10);
2771
2772 ✗ ff_permute_scantable(m->intra_scantable.permutated,
2773 ✗ s->flags & 0x10 ? ff_alternate_vertical_scan : ff_zigzag_direct,
2774 ✗ m->idsp.idct_permutation);
2775
2776 ✗ m->last_dc[0] = m->last_dc[1] = m->last_dc[2] = 1 << (7 + (s->flags & 3));
2777 ✗ m->qscale = 1;
2778
2779 ✗ for (int y = 0; y < avctx->height; y += 16) {
2780 int intraquant;
2781
2782 ✗ for (int x = 0; x < avctx->width; x += 16) {
2783 ✗ if (x || y) {
2784 ✗ if (!get_bits1(gb))
2785 ✗ return AVERROR_INVALIDDATA;
2786 }
2787 ✗ if (get_bits1(gb)) {
2788 ✗ intraquant = 0;
2789 } else {
2790 ✗ if (!get_bits1(gb))
2791 ✗ return AVERROR_INVALIDDATA;
2792 ✗ intraquant = 1;
2793 }
2794
2795 ✗ if (s->flags & 4)
2796 ✗ skip_bits1(gb);
2797
2798 ✗ if (intraquant)
2799 ✗ m->qscale = mpeg_get_qscale(m);
2800
2801 ✗ memset(s->block, 0, sizeof(s->block));
2802
2803 ✗ for (int n = 0; n < 6; n++) {
2804 ✗ if (s->flags & 0x80) {
2805 ✗ ret = ff_mpeg1_decode_block_intra(&m->gb,
2806 ✗ m->intra_matrix,
2807 ✗ m->intra_scantable.permutated,
2808 ✗ m->last_dc, s->block[n],
2809 n, m->qscale);
2810 } else {
2811 ✗ ret = mpeg2_decode_block_intra(m, s->block[n], n);
2812 }
2813
2814 ✗ if (ret < 0)
2815 ✗ return ret;
2816 }
2817
2818 ✗ m->idsp.idct_put(frame->data[0] + y * frame->linesize[0] + x,
2819 ✗ frame->linesize[0], s->block[0]);
2820 ✗ m->idsp.idct_put(frame->data[0] + y * frame->linesize[0] + x + 8,
2821 ✗ frame->linesize[0], s->block[1]);
2822 ✗ m->idsp.idct_put(frame->data[0] + (y + 8) * frame->linesize[0] + x,
2823 ✗ frame->linesize[0], s->block[2]);
2824 ✗ m->idsp.idct_put(frame->data[0] + (y + 8) * frame->linesize[0] + x + 8,
2825 ✗ frame->linesize[0], s->block[3]);
2826 ✗ m->idsp.idct_put(frame->data[1] + (y >> 1) * frame->linesize[1] + (x >> 1),
2827 ✗ frame->linesize[1], s->block[4]);
2828 ✗ m->idsp.idct_put(frame->data[2] + (y >> 1) * frame->linesize[2] + (x >> 1),
2829 ✗ frame->linesize[2], s->block[5]);
2830 }
2831 }
2832
2833 ✗ align_get_bits(gb);
2834 ✗ if (get_bits_left(gb) != 32)
2835 ✗ return AVERROR_INVALIDDATA;
2836
2837 ✗ *got_frame = 1;
2838
2839 ✗ return avpkt->size;
2840 }
2841
2842 ✗ static av_cold int ipu_decode_init(AVCodecContext *avctx)
2843 {
2844 ✗ IPUContext *s = avctx->priv_data;
2845 ✗ MpegEncContext *m = &s->m;
2846
2847 ✗ avctx->pix_fmt = AV_PIX_FMT_YUV420P;
2848 ✗ m->avctx = avctx;
2849
2850 ✗ ff_idctdsp_init(&m->idsp, avctx);
2851 ✗ ff_mpeg12_init_vlcs();
2852
2853 ✗ for (int i = 0; i < 64; i++) {
2854 ✗ int j = m->idsp.idct_permutation[i];
2855 ✗ int v = ff_mpeg1_default_intra_matrix[i];
2856 ✗ m->intra_matrix[j] = v;
2857 ✗ m->chroma_intra_matrix[j] = v;
2858 }
2859
2860 ✗ return 0;
2861 }
2862
2863 const FFCodec ff_ipu_decoder = {
2864 .p.name = "ipu",
2865 CODEC_LONG_NAME("IPU Video"),
2866 .p.type = AVMEDIA_TYPE_VIDEO,
2867 .p.id = AV_CODEC_ID_IPU,
2868 .priv_data_size = sizeof(IPUContext),
2869 .init = ipu_decode_init,
2870 FF_CODEC_DECODE_CB(ipu_decode_frame),
2871 .p.capabilities = AV_CODEC_CAP_DR1,
2872 };
2873