Libav
truemotion2.c
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1 /*
2  * Duck/ON2 TrueMotion 2 Decoder
3  * Copyright (c) 2005 Konstantin Shishkov
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
27 #include <inttypes.h>
28 
29 #include "avcodec.h"
30 #include "bswapdsp.h"
31 #include "bytestream.h"
32 #include "get_bits.h"
33 #include "internal.h"
34 
35 #define TM2_ESCAPE 0x80000000
36 #define TM2_DELTAS 64
37 
38 /* Huffman-coded streams of different types of blocks */
40  TM2_C_HI = 0,
48 };
49 
50 /* Block types */
51 enum TM2_BLOCKS {
59 };
60 
61 typedef struct TM2Context {
64 
67 
68  /* TM2 streams */
73  /* for blocks decoding */
74  int D[4];
75  int CD[4];
76  int *last;
77  int *clast;
78 
79  /* data for current and previous frame */
81  int *Y1, *U1, *V1, *Y2, *U2, *V2;
83  int cur;
84 } TM2Context;
85 
89 typedef struct TM2Codes {
90  VLC vlc;
91  int bits;
92  int *recode;
93  int length;
94 } TM2Codes;
95 
99 typedef struct TM2Huff {
100  int val_bits;
101  int max_bits;
102  int min_bits;
103  int nodes;
104  int num;
105  int max_num;
106  int *nums;
107  uint32_t *bits;
108  int *lens;
109 } TM2Huff;
110 
111 static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
112 {
113  int ret;
114  if (length > huff->max_bits) {
115  av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n",
116  huff->max_bits);
117  return AVERROR_INVALIDDATA;
118  }
119 
120  if (!get_bits1(&ctx->gb)) { /* literal */
121  if (length == 0) {
122  length = 1;
123  }
124  if (huff->num >= huff->max_num) {
125  av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
126  return AVERROR_INVALIDDATA;
127  }
128  huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits);
129  huff->bits[huff->num] = prefix;
130  huff->lens[huff->num] = length;
131  huff->num++;
132  return 0;
133  } else { /* non-terminal node */
134  if ((ret = tm2_read_tree(ctx, prefix << 1, length + 1, huff)) < 0)
135  return ret;
136  if ((ret = tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff)) < 0)
137  return ret;
138  }
139  return 0;
140 }
141 
142 static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
143 {
144  TM2Huff huff;
145  int res = 0;
146 
147  huff.val_bits = get_bits(&ctx->gb, 5);
148  huff.max_bits = get_bits(&ctx->gb, 5);
149  huff.min_bits = get_bits(&ctx->gb, 5);
150  huff.nodes = get_bits_long(&ctx->gb, 17);
151  huff.num = 0;
152 
153  /* check for correct codes parameters */
154  if ((huff.val_bits < 1) || (huff.val_bits > 32) ||
155  (huff.max_bits < 0) || (huff.max_bits > 25)) {
156  av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal "
157  "length: %i, max code length: %i\n", huff.val_bits, huff.max_bits);
158  return AVERROR_INVALIDDATA;
159  }
160  if ((huff.nodes <= 0) || (huff.nodes > 0x10000)) {
161  av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree "
162  "nodes: %i\n", huff.nodes);
163  return AVERROR_INVALIDDATA;
164  }
165  /* one-node tree */
166  if (huff.max_bits == 0)
167  huff.max_bits = 1;
168 
169  /* allocate space for codes - it is exactly ceil(nodes / 2) entries */
170  huff.max_num = (huff.nodes + 1) >> 1;
171  huff.nums = av_mallocz(huff.max_num * sizeof(int));
172  huff.bits = av_mallocz(huff.max_num * sizeof(uint32_t));
173  huff.lens = av_mallocz(huff.max_num * sizeof(int));
174 
175  res = tm2_read_tree(ctx, 0, 0, &huff);
176 
177  if (huff.num != huff.max_num) {
178  av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n",
179  huff.num, huff.max_num);
180  res = AVERROR_INVALIDDATA;
181  }
182 
183  /* convert codes to vlc_table */
184  if (res >= 0) {
185  int i;
186 
187  res = init_vlc(&code->vlc, huff.max_bits, huff.max_num,
188  huff.lens, sizeof(int), sizeof(int),
189  huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0);
190  if (res < 0)
191  av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
192  else {
193  code->bits = huff.max_bits;
194  code->length = huff.max_num;
195  code->recode = av_malloc(code->length * sizeof(int));
196  for (i = 0; i < code->length; i++)
197  code->recode[i] = huff.nums[i];
198  }
199  }
200  /* free allocated memory */
201  av_free(huff.nums);
202  av_free(huff.bits);
203  av_free(huff.lens);
204 
205  return res;
206 }
207 
208 static void tm2_free_codes(TM2Codes *code)
209 {
210  av_free(code->recode);
211  if (code->vlc.table)
212  ff_free_vlc(&code->vlc);
213 }
214 
215 static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
216 {
217  int val;
218  val = get_vlc2(gb, code->vlc.table, code->bits, 1);
219  return code->recode[val];
220 }
221 
222 #define TM2_OLD_HEADER_MAGIC 0x00000100
223 #define TM2_NEW_HEADER_MAGIC 0x00000101
224 
225 static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
226 {
227  uint32_t magic = AV_RL32(buf);
228 
229  switch (magic) {
231  avpriv_request_sample(ctx->avctx, "Old TM2 header");
232  return 0;
234  return 0;
235  default:
236  av_log(ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08"PRIX32"\n",
237  magic);
238  return AVERROR_INVALIDDATA;
239  }
240 }
241 
242 static int tm2_read_deltas(TM2Context *ctx, int stream_id)
243 {
244  int d, mb;
245  int i, v;
246 
247  d = get_bits(&ctx->gb, 9);
248  mb = get_bits(&ctx->gb, 5);
249 
250  if ((d < 1) || (d > TM2_DELTAS) || (mb < 1) || (mb > 32)) {
251  av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb);
252  return AVERROR_INVALIDDATA;
253  }
254 
255  for (i = 0; i < d; i++) {
256  v = get_bits_long(&ctx->gb, mb);
257  if (v & (1 << (mb - 1)))
258  ctx->deltas[stream_id][i] = v - (1 << mb);
259  else
260  ctx->deltas[stream_id][i] = v;
261  }
262  for (; i < TM2_DELTAS; i++)
263  ctx->deltas[stream_id][i] = 0;
264 
265  return 0;
266 }
267 
268 static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
269 {
270  int i, ret;
271  int skip = 0;
272  int len, toks, pos;
273  TM2Codes codes;
274  GetByteContext gb;
275 
276  /* get stream length in dwords */
277  bytestream2_init(&gb, buf, buf_size);
278  len = bytestream2_get_be32(&gb);
279  skip = len * 4 + 4;
280 
281  if (len == 0)
282  return 4;
283 
284  if (len >= INT_MAX/4-1 || len < 0 || len > buf_size) {
285  av_log(ctx->avctx, AV_LOG_ERROR, "Error, invalid stream size.\n");
286  return AVERROR_INVALIDDATA;
287  }
288 
289  toks = bytestream2_get_be32(&gb);
290  if (toks & 1) {
291  len = bytestream2_get_be32(&gb);
292  if (len == TM2_ESCAPE) {
293  len = bytestream2_get_be32(&gb);
294  }
295  if (len > 0) {
296  pos = bytestream2_tell(&gb);
297  if (skip <= pos)
298  return AVERROR_INVALIDDATA;
299  init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
300  if ((ret = tm2_read_deltas(ctx, stream_id)) < 0)
301  return ret;
302  bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
303  }
304  }
305  /* skip unused fields */
306  len = bytestream2_get_be32(&gb);
307  if (len == TM2_ESCAPE) { /* some unknown length - could be escaped too */
308  bytestream2_skip(&gb, 8); /* unused by decoder */
309  } else {
310  bytestream2_skip(&gb, 4); /* unused by decoder */
311  }
312 
313  pos = bytestream2_tell(&gb);
314  if (skip <= pos)
315  return AVERROR_INVALIDDATA;
316  init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
317  if ((ret = tm2_build_huff_table(ctx, &codes)) < 0)
318  return ret;
319  bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
320 
321  toks >>= 1;
322  /* check if we have sane number of tokens */
323  if ((toks < 0) || (toks > 0xFFFFFF)) {
324  av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
325  tm2_free_codes(&codes);
326  return AVERROR_INVALIDDATA;
327  }
328  ctx->tokens[stream_id] = av_realloc(ctx->tokens[stream_id], toks * sizeof(int));
329  ctx->tok_lens[stream_id] = toks;
330  len = bytestream2_get_be32(&gb);
331  if (len > 0) {
332  pos = bytestream2_tell(&gb);
333  if (skip <= pos)
334  return AVERROR_INVALIDDATA;
335  init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
336  for (i = 0; i < toks; i++) {
337  if (get_bits_left(&ctx->gb) <= 0) {
338  av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
339  return AVERROR_INVALIDDATA;
340  }
341  ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
342  if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) {
343  av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
344  ctx->tokens[stream_id][i], stream_id, i);
345  return AVERROR_INVALIDDATA;
346  }
347  }
348  } else {
349  for (i = 0; i < toks; i++) {
350  ctx->tokens[stream_id][i] = codes.recode[0];
351  if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) {
352  av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
353  ctx->tokens[stream_id][i], stream_id, i);
354  return AVERROR_INVALIDDATA;
355  }
356  }
357  }
358  tm2_free_codes(&codes);
359 
360  return skip;
361 }
362 
363 static inline int GET_TOK(TM2Context *ctx,int type)
364 {
365  if (ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
366  av_log(ctx->avctx, AV_LOG_ERROR, "Read token from stream %i out of bounds (%i>=%i)\n", type, ctx->tok_ptrs[type], ctx->tok_lens[type]);
367  return 0;
368  }
369  if (type <= TM2_MOT)
370  return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
371  return ctx->tokens[type][ctx->tok_ptrs[type]++];
372 }
373 
374 /* blocks decoding routines */
375 
376 /* common Y, U, V pointers initialisation */
377 #define TM2_INIT_POINTERS() \
378  int *last, *clast; \
379  int *Y, *U, *V;\
380  int Ystride, Ustride, Vstride;\
381 \
382  Ystride = ctx->y_stride;\
383  Vstride = ctx->uv_stride;\
384  Ustride = ctx->uv_stride;\
385  Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
386  V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
387  U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
388  last = ctx->last + bx * 4;\
389  clast = ctx->clast + bx * 4;
390 
391 #define TM2_INIT_POINTERS_2() \
392  int *Yo, *Uo, *Vo;\
393  int oYstride, oUstride, oVstride;\
394 \
395  TM2_INIT_POINTERS();\
396  oYstride = Ystride;\
397  oVstride = Vstride;\
398  oUstride = Ustride;\
399  Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
400  Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
401  Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;
402 
403 /* recalculate last and delta values for next blocks */
404 #define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
405  CD[0] = CHR[1] - last[1];\
406  CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\
407  last[0] = (int)CHR[stride + 0];\
408  last[1] = (int)CHR[stride + 1];}
409 
410 /* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */
411 static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
412 {
413  int ct, d;
414  int i, j;
415 
416  for (j = 0; j < 4; j++){
417  ct = ctx->D[j];
418  for (i = 0; i < 4; i++){
419  d = deltas[i + j * 4];
420  ct += d;
421  last[i] += ct;
422  Y[i] = av_clip_uint8(last[i]);
423  }
424  Y += stride;
425  ctx->D[j] = ct;
426  }
427 }
428 
429 static inline void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas)
430 {
431  int i, j;
432  for (j = 0; j < 2; j++) {
433  for (i = 0; i < 2; i++) {
434  CD[j] += deltas[i + j * 2];
435  last[i] += CD[j];
436  data[i] = last[i];
437  }
438  data += stride;
439  }
440 }
441 
442 static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx)
443 {
444  int t;
445  int l;
446  int prev;
447 
448  if (bx > 0)
449  prev = clast[-3];
450  else
451  prev = 0;
452  t = (CD[0] + CD[1]) >> 1;
453  l = (prev - CD[0] - CD[1] + clast[1]) >> 1;
454  CD[1] = CD[0] + CD[1] - t;
455  CD[0] = t;
456  clast[0] = l;
457 
458  tm2_high_chroma(data, stride, clast, CD, deltas);
459 }
460 
461 static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
462 {
463  int i;
464  int deltas[16];
466 
467  /* hi-res chroma */
468  for (i = 0; i < 4; i++) {
469  deltas[i] = GET_TOK(ctx, TM2_C_HI);
470  deltas[i + 4] = GET_TOK(ctx, TM2_C_HI);
471  }
472  tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
473  tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
474 
475  /* hi-res luma */
476  for (i = 0; i < 16; i++)
477  deltas[i] = GET_TOK(ctx, TM2_L_HI);
478 
479  tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
480 }
481 
482 static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
483 {
484  int i;
485  int deltas[16];
487 
488  /* low-res chroma */
489  deltas[0] = GET_TOK(ctx, TM2_C_LO);
490  deltas[1] = deltas[2] = deltas[3] = 0;
491  tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
492 
493  deltas[0] = GET_TOK(ctx, TM2_C_LO);
494  deltas[1] = deltas[2] = deltas[3] = 0;
495  tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
496 
497  /* hi-res luma */
498  for (i = 0; i < 16; i++)
499  deltas[i] = GET_TOK(ctx, TM2_L_HI);
500 
501  tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
502 }
503 
504 static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
505 {
506  int i;
507  int t1, t2;
508  int deltas[16];
510 
511  /* low-res chroma */
512  deltas[0] = GET_TOK(ctx, TM2_C_LO);
513  deltas[1] = deltas[2] = deltas[3] = 0;
514  tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
515 
516  deltas[0] = GET_TOK(ctx, TM2_C_LO);
517  deltas[1] = deltas[2] = deltas[3] = 0;
518  tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
519 
520  /* low-res luma */
521  for (i = 0; i < 16; i++)
522  deltas[i] = 0;
523 
524  deltas[ 0] = GET_TOK(ctx, TM2_L_LO);
525  deltas[ 2] = GET_TOK(ctx, TM2_L_LO);
526  deltas[ 8] = GET_TOK(ctx, TM2_L_LO);
527  deltas[10] = GET_TOK(ctx, TM2_L_LO);
528 
529  if (bx > 0)
530  last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
531  else
532  last[0] = (last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
533  last[2] = (last[1] + last[3]) >> 1;
534 
535  t1 = ctx->D[0] + ctx->D[1];
536  ctx->D[0] = t1 >> 1;
537  ctx->D[1] = t1 - (t1 >> 1);
538  t2 = ctx->D[2] + ctx->D[3];
539  ctx->D[2] = t2 >> 1;
540  ctx->D[3] = t2 - (t2 >> 1);
541 
542  tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
543 }
544 
545 static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
546 {
547  int i;
548  int ct;
549  int left, right, diff;
550  int deltas[16];
552 
553  /* null chroma */
554  deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
555  tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
556 
557  deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
558  tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
559 
560  /* null luma */
561  for (i = 0; i < 16; i++)
562  deltas[i] = 0;
563 
564  ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
565 
566  if (bx > 0)
567  left = last[-1] - ct;
568  else
569  left = 0;
570 
571  right = last[3];
572  diff = right - left;
573  last[0] = left + (diff >> 2);
574  last[1] = left + (diff >> 1);
575  last[2] = right - (diff >> 2);
576  last[3] = right;
577  {
578  int tp = left;
579 
580  ctx->D[0] = (tp + (ct >> 2)) - left;
581  left += ctx->D[0];
582  ctx->D[1] = (tp + (ct >> 1)) - left;
583  left += ctx->D[1];
584  ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
585  left += ctx->D[2];
586  ctx->D[3] = (tp + ct) - left;
587  }
588  tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
589 }
590 
591 static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
592 {
593  int i, j;
595 
596  /* update chroma */
597  for (j = 0; j < 2; j++) {
598  for (i = 0; i < 2; i++){
599  U[i] = Uo[i];
600  V[i] = Vo[i];
601  }
602  U += Ustride; V += Vstride;
603  Uo += oUstride; Vo += oVstride;
604  }
605  U -= Ustride * 2;
606  V -= Vstride * 2;
607  TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
608  TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
609 
610  /* update deltas */
611  ctx->D[0] = Yo[3] - last[3];
612  ctx->D[1] = Yo[3 + oYstride] - Yo[3];
613  ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
614  ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
615 
616  for (j = 0; j < 4; j++) {
617  for (i = 0; i < 4; i++) {
618  Y[i] = Yo[i];
619  last[i] = Yo[i];
620  }
621  Y += Ystride;
622  Yo += oYstride;
623  }
624 }
625 
626 static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
627 {
628  int i, j;
629  int d;
631 
632  /* update chroma */
633  for (j = 0; j < 2; j++) {
634  for (i = 0; i < 2; i++) {
635  U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
636  V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
637  }
638  U += Ustride;
639  V += Vstride;
640  Uo += oUstride;
641  Vo += oVstride;
642  }
643  U -= Ustride * 2;
644  V -= Vstride * 2;
645  TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
646  TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
647 
648  /* update deltas */
649  ctx->D[0] = Yo[3] - last[3];
650  ctx->D[1] = Yo[3 + oYstride] - Yo[3];
651  ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
652  ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
653 
654  for (j = 0; j < 4; j++) {
655  d = last[3];
656  for (i = 0; i < 4; i++) {
657  Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD);
658  last[i] = Y[i];
659  }
660  ctx->D[j] = last[3] - d;
661  Y += Ystride;
662  Yo += oYstride;
663  }
664 }
665 
666 static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
667 {
668  int i, j;
669  int mx, my;
671 
672  mx = GET_TOK(ctx, TM2_MOT);
673  my = GET_TOK(ctx, TM2_MOT);
674  mx = av_clip(mx, -(bx * 4 + 4), ctx->avctx->width - bx * 4);
675  my = av_clip(my, -(by * 4 + 4), ctx->avctx->height - by * 4);
676 
677  Yo += my * oYstride + mx;
678  Uo += (my >> 1) * oUstride + (mx >> 1);
679  Vo += (my >> 1) * oVstride + (mx >> 1);
680 
681  /* copy chroma */
682  for (j = 0; j < 2; j++) {
683  for (i = 0; i < 2; i++) {
684  U[i] = Uo[i];
685  V[i] = Vo[i];
686  }
687  U += Ustride;
688  V += Vstride;
689  Uo += oUstride;
690  Vo += oVstride;
691  }
692  U -= Ustride * 2;
693  V -= Vstride * 2;
694  TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
695  TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
696 
697  /* copy luma */
698  for (j = 0; j < 4; j++) {
699  for (i = 0; i < 4; i++) {
700  Y[i] = Yo[i];
701  }
702  Y += Ystride;
703  Yo += oYstride;
704  }
705  /* calculate deltas */
706  Y -= Ystride * 4;
707  ctx->D[0] = Y[3] - last[3];
708  ctx->D[1] = Y[3 + Ystride] - Y[3];
709  ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride];
710  ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
711  for (i = 0; i < 4; i++)
712  last[i] = Y[i + Ystride * 3];
713 }
714 
716 {
717  int i, j;
718  int w = ctx->avctx->width, h = ctx->avctx->height, bw = w >> 2, bh = h >> 2, cw = w >> 1;
719  int type;
720  int keyframe = 1;
721  int *Y, *U, *V;
722  uint8_t *dst;
723 
724  for (i = 0; i < TM2_NUM_STREAMS; i++)
725  ctx->tok_ptrs[i] = 0;
726 
727  if (ctx->tok_lens[TM2_TYPE]<bw*bh) {
728  av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh);
729  return AVERROR_INVALIDDATA;
730  }
731 
732  memset(ctx->last, 0, 4 * bw * sizeof(int));
733  memset(ctx->clast, 0, 4 * bw * sizeof(int));
734 
735  for (j = 0; j < bh; j++) {
736  memset(ctx->D, 0, 4 * sizeof(int));
737  memset(ctx->CD, 0, 4 * sizeof(int));
738  for (i = 0; i < bw; i++) {
739  type = GET_TOK(ctx, TM2_TYPE);
740  switch(type) {
741  case TM2_HI_RES:
742  tm2_hi_res_block(ctx, p, i, j);
743  break;
744  case TM2_MED_RES:
745  tm2_med_res_block(ctx, p, i, j);
746  break;
747  case TM2_LOW_RES:
748  tm2_low_res_block(ctx, p, i, j);
749  break;
750  case TM2_NULL_RES:
751  tm2_null_res_block(ctx, p, i, j);
752  break;
753  case TM2_UPDATE:
754  tm2_update_block(ctx, p, i, j);
755  keyframe = 0;
756  break;
757  case TM2_STILL:
758  tm2_still_block(ctx, p, i, j);
759  keyframe = 0;
760  break;
761  case TM2_MOTION:
762  tm2_motion_block(ctx, p, i, j);
763  keyframe = 0;
764  break;
765  default:
766  av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
767  }
768  }
769  }
770 
771  /* copy data from our buffer to AVFrame */
772  Y = (ctx->cur?ctx->Y2:ctx->Y1);
773  U = (ctx->cur?ctx->U2:ctx->U1);
774  V = (ctx->cur?ctx->V2:ctx->V1);
775  dst = p->data[0];
776  for (j = 0; j < h; j++) {
777  for (i = 0; i < w; i++) {
778  int y = Y[i], u = U[i >> 1], v = V[i >> 1];
779  dst[3*i+0] = av_clip_uint8(y + v);
780  dst[3*i+1] = av_clip_uint8(y);
781  dst[3*i+2] = av_clip_uint8(y + u);
782  }
783 
784  /* horizontal edge extension */
785  Y[-4] = Y[-3] = Y[-2] = Y[-1] = Y[0];
786  Y[w + 3] = Y[w + 2] = Y[w + 1] = Y[w] = Y[w - 1];
787 
788  /* vertical edge extension */
789  if (j == 0) {
790  memcpy(Y - 4 - 1 * ctx->y_stride, Y - 4, ctx->y_stride);
791  memcpy(Y - 4 - 2 * ctx->y_stride, Y - 4, ctx->y_stride);
792  memcpy(Y - 4 - 3 * ctx->y_stride, Y - 4, ctx->y_stride);
793  memcpy(Y - 4 - 4 * ctx->y_stride, Y - 4, ctx->y_stride);
794  } else if (j == h - 1) {
795  memcpy(Y - 4 + 1 * ctx->y_stride, Y - 4, ctx->y_stride);
796  memcpy(Y - 4 + 2 * ctx->y_stride, Y - 4, ctx->y_stride);
797  memcpy(Y - 4 + 3 * ctx->y_stride, Y - 4, ctx->y_stride);
798  memcpy(Y - 4 + 4 * ctx->y_stride, Y - 4, ctx->y_stride);
799  }
800 
801  Y += ctx->y_stride;
802  if (j & 1) {
803  /* horizontal edge extension */
804  U[-2] = U[-1] = U[0];
805  V[-2] = V[-1] = V[0];
806  U[cw + 1] = U[cw] = U[cw - 1];
807  V[cw + 1] = V[cw] = V[cw - 1];
808 
809  /* vertical edge extension */
810  if (j == 1) {
811  memcpy(U - 2 - 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
812  memcpy(V - 2 - 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
813  memcpy(U - 2 - 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
814  memcpy(V - 2 - 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
815  } else if (j == h - 1) {
816  memcpy(U - 2 + 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
817  memcpy(V - 2 + 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
818  memcpy(U - 2 + 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
819  memcpy(V - 2 + 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
820  }
821 
822  U += ctx->uv_stride;
823  V += ctx->uv_stride;
824  }
825  dst += p->linesize[0];
826  }
827 
828  return keyframe;
829 }
830 
831 static const int tm2_stream_order[TM2_NUM_STREAMS] = {
833 };
834 
835 #define TM2_HEADER_SIZE 40
836 
837 static int decode_frame(AVCodecContext *avctx,
838  void *data, int *got_frame,
839  AVPacket *avpkt)
840 {
841  TM2Context * const l = avctx->priv_data;
842  const uint8_t *buf = avpkt->data;
843  int buf_size = avpkt->size & ~3;
844  AVFrame * const p = l->pic;
845  int offset = TM2_HEADER_SIZE;
846  int i, t, ret;
847  uint8_t *swbuf;
848 
849  swbuf = av_malloc(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
850  if (!swbuf) {
851  av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");
852  return AVERROR(ENOMEM);
853  }
854 
855  if ((ret = ff_reget_buffer(avctx, p)) < 0) {
856  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
857  av_free(swbuf);
858  return ret;
859  }
860 
861  l->bdsp.bswap_buf((uint32_t *) swbuf, (const uint32_t *) buf,
862  buf_size >> 2);
863 
864  if ((ret = tm2_read_header(l, swbuf)) < 0) {
865  av_free(swbuf);
866  return ret;
867  }
868 
869  for (i = 0; i < TM2_NUM_STREAMS; i++) {
870  if (offset >= buf_size) {
871  av_free(swbuf);
872  return AVERROR_INVALIDDATA;
873  }
874  t = tm2_read_stream(l, swbuf + offset, tm2_stream_order[i],
875  buf_size - offset);
876  if (t < 0) {
877  av_free(swbuf);
878  return t;
879  }
880  offset += t;
881  }
882  p->key_frame = tm2_decode_blocks(l, p);
883  if (p->key_frame)
885  else
887 
888  l->cur = !l->cur;
889  *got_frame = 1;
890  ret = av_frame_ref(data, l->pic);
891  av_free(swbuf);
892 
893  return (ret < 0) ? ret : buf_size;
894 }
895 
897 {
898  TM2Context * const l = avctx->priv_data;
899  int i, w = avctx->width, h = avctx->height;
900 
901  if ((avctx->width & 3) || (avctx->height & 3)) {
902  av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
903  return AVERROR(EINVAL);
904  }
905 
906  l->avctx = avctx;
907  avctx->pix_fmt = AV_PIX_FMT_BGR24;
908 
909  l->pic = av_frame_alloc();
910  if (!l->pic)
911  return AVERROR(ENOMEM);
912 
913  ff_bswapdsp_init(&l->bdsp);
914 
915  l->last = av_malloc(4 * sizeof(*l->last) * (w >> 2));
916  l->clast = av_malloc(4 * sizeof(*l->clast) * (w >> 2));
917 
918  for (i = 0; i < TM2_NUM_STREAMS; i++) {
919  l->tokens[i] = NULL;
920  l->tok_lens[i] = 0;
921  }
922 
923  w += 8;
924  h += 8;
925  l->Y1_base = av_malloc(sizeof(*l->Y1_base) * w * h);
926  l->Y2_base = av_malloc(sizeof(*l->Y2_base) * w * h);
927  l->y_stride = w;
928  w = (w + 1) >> 1;
929  h = (h + 1) >> 1;
930  l->U1_base = av_malloc(sizeof(*l->U1_base) * w * h);
931  l->V1_base = av_malloc(sizeof(*l->V1_base) * w * h);
932  l->U2_base = av_malloc(sizeof(*l->U2_base) * w * h);
933  l->V2_base = av_malloc(sizeof(*l->V1_base) * w * h);
934  l->uv_stride = w;
935  l->cur = 0;
936  if (!l->Y1_base || !l->Y2_base || !l->U1_base ||
937  !l->V1_base || !l->U2_base || !l->V2_base ||
938  !l->last || !l->clast) {
939  av_freep(&l->Y1_base);
940  av_freep(&l->Y2_base);
941  av_freep(&l->U1_base);
942  av_freep(&l->U2_base);
943  av_freep(&l->V1_base);
944  av_freep(&l->V2_base);
945  av_freep(&l->last);
946  av_freep(&l->clast);
947  return AVERROR(ENOMEM);
948  }
949  l->Y1 = l->Y1_base + l->y_stride * 4 + 4;
950  l->Y2 = l->Y2_base + l->y_stride * 4 + 4;
951  l->U1 = l->U1_base + l->uv_stride * 2 + 2;
952  l->U2 = l->U2_base + l->uv_stride * 2 + 2;
953  l->V1 = l->V1_base + l->uv_stride * 2 + 2;
954  l->V2 = l->V2_base + l->uv_stride * 2 + 2;
955 
956  return 0;
957 }
958 
960 {
961  TM2Context * const l = avctx->priv_data;
962  int i;
963 
964  av_free(l->last);
965  av_free(l->clast);
966  for (i = 0; i < TM2_NUM_STREAMS; i++)
967  av_free(l->tokens[i]);
968  if (l->Y1) {
969  av_free(l->Y1_base);
970  av_free(l->U1_base);
971  av_free(l->V1_base);
972  av_free(l->Y2_base);
973  av_free(l->U2_base);
974  av_free(l->V2_base);
975  }
976 
977  av_frame_free(&l->pic);
978 
979  return 0;
980 }
981 
983  .name = "truemotion2",
984  .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"),
985  .type = AVMEDIA_TYPE_VIDEO,
987  .priv_data_size = sizeof(TM2Context),
988  .init = decode_init,
989  .close = decode_end,
990  .decode = decode_frame,
991  .capabilities = CODEC_CAP_DR1,
992 };
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
Definition: bswapdsp.h:25
static void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx)
Definition: truemotion2.c:442
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:62
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
This structure describes decoded (raw) audio or video data.
Definition: frame.h:135
int * V2
Definition: truemotion2.c:81
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:240
int * U1_base
Definition: truemotion2.c:80
int D[4]
Definition: truemotion2.c:74
int * last
Definition: truemotion2.c:76
int * recode
table for converting from code indexes to values
Definition: truemotion2.c:92
int size
Definition: avcodec.h:974
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1254
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:130
AVCodec ff_truemotion2_decoder
Definition: truemotion2.c:982
int stride
Definition: mace.c:144
AVCodec.
Definition: avcodec.h:2796
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:198
int num
current number filled
Definition: truemotion2.c:104
static int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
Definition: truemotion2.c:225
#define TM2_HEADER_SIZE
Definition: truemotion2.c:835
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:275
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
structure for gathering Huffman codes information
Definition: truemotion2.c:99
uint8_t
#define av_cold
Definition: attributes.h:66
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:57
TM2_STREAMS
Definition: truemotion2.c:39
static const int tm2_stream_order[TM2_NUM_STREAMS]
Definition: truemotion2.c:831
AVCodecContext * avctx
Definition: truemotion2.c:62
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:188
int max_bits
maximum length of code
Definition: truemotion2.c:101
static int tm2_read_deltas(TM2Context *ctx, int stream_id)
Definition: truemotion2.c:242
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:684
const char data[16]
Definition: mxf.c:70
static void tm2_free_codes(TM2Codes *code)
Definition: truemotion2.c:208
uint8_t * data
Definition: avcodec.h:973
int min_bits
minimum length of code
Definition: truemotion2.c:102
int * U2
Definition: truemotion2.c:81
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:194
static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
Definition: truemotion2.c:111
VLC vlc
table for Libav bitstream reader
Definition: truemotion2.c:90
bitstream reader API header.
static void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:461
static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
Definition: truemotion2.c:268
static void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:626
Definition: vf_drawbox.c:37
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:555
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:186
int val_bits
length of literal
Definition: truemotion2.c:100
#define AVERROR(e)
Definition: error.h:43
static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
Definition: truemotion2.c:142
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:159
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:69
static void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:504
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:150
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:144
static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
Definition: truemotion2.c:715
int * tokens[TM2_NUM_STREAMS]
Definition: truemotion2.c:69
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:168
const char * name
Name of the codec implementation.
Definition: avcodec.h:2803
int * clast
Definition: truemotion2.c:77
Definition: get_bits.h:64
AVFrame * pic
Definition: truemotion2.c:63
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
Definition: bswapdsp.c:49
int * V1
Definition: truemotion2.c:81
int * V2_base
Definition: truemotion2.c:80
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:531
int max_num
total number of codes
Definition: truemotion2.c:105
#define V
Definition: options_table.h:35
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
Identical in function to av_frame_make_writable(), except it uses ff_get_buffer() to allocate the buf...
Definition: utils.c:808
int bits
Definition: truemotion2.c:91
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:196
static int GET_TOK(TM2Context *ctx, int type)
Definition: truemotion2.c:363
int width
picture width / height.
Definition: avcodec.h:1224
#define TM2_OLD_HEADER_MAGIC
Definition: truemotion2.c:222
int uv_stride
Definition: truemotion2.c:82
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:522
#define AV_RL32
Definition: intreadwrite.h:146
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:68
static int tm2_get_token(GetBitContext *gb, TM2Codes *code)
Definition: truemotion2.c:215
int CD[4]
Definition: truemotion2.c:75
int * nums
literals
Definition: truemotion2.c:106
int nodes
total number of nodes in tree
Definition: truemotion2.c:103
if(ac->has_optimized_func)
static av_cold int decode_end(AVCodecContext *avctx)
Definition: truemotion2.c:959
int * Y1
Definition: truemotion2.c:81
int * V1_base
Definition: truemotion2.c:80
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:183
NULL
Definition: eval.c:55
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:153
#define TM2_INIT_POINTERS_2()
Definition: truemotion2.c:391
main external API structure.
Definition: avcodec.h:1050
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:490
static void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:591
#define TM2_DELTAS
Definition: truemotion2.c:36
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: get_bits.h:424
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:271
#define TM2_INIT_POINTERS()
Definition: truemotion2.c:377
int * Y1_base
Definition: truemotion2.c:80
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:375
static void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:482
static void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:666
uint32_t * bits
codes
Definition: truemotion2.c:107
int length
Definition: truemotion2.c:93
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:304
static void tm2_apply_deltas(TM2Context *ctx, int *Y, int stride, int *deltas, int *last)
Definition: truemotion2.c:411
#define TM2_ESCAPE
Definition: truemotion2.c:35
#define TM2_RECALC_BLOCK(CHR, stride, last, CD)
Definition: truemotion2.c:404
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:141
int * U1
Definition: truemotion2.c:81
int * Y2
Definition: truemotion2.c:81
common internal api header.
void * av_realloc(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:117
int y_stride
Definition: truemotion2.c:82
static void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:545
int deltas[TM2_NUM_STREAMS][TM2_DELTAS]
Definition: truemotion2.c:72
int * lens
codelengths
Definition: truemotion2.c:108
static av_cold int decode_init(AVCodecContext *avctx)
Definition: truemotion2.c:896
int * Y2_base
Definition: truemotion2.c:80
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:499
#define TM2_NEW_HEADER_MAGIC
Definition: truemotion2.c:223
void * priv_data
Definition: avcodec.h:1092
int * U2_base
Definition: truemotion2.c:80
TM2_BLOCKS
Definition: truemotion2.c:51
GetBitContext gb
Definition: truemotion2.c:65
int len
VLC_TYPE(* table)[2]
code, bits
Definition: get_bits.h:66
int tok_lens[TM2_NUM_STREAMS]
Definition: truemotion2.c:70
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:191
static void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas)
Definition: truemotion2.c:429
Huffman codes for each of streams.
Definition: truemotion2.c:89
int tok_ptrs[TM2_NUM_STREAMS]
Definition: truemotion2.c:71
This structure stores compressed data.
Definition: avcodec.h:950
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:333
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:205
BswapDSPContext bdsp
Definition: truemotion2.c:66
Predicted.
Definition: avutil.h:254
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: truemotion2.c:837
Definition: vf_drawbox.c:37