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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 FFmpeg.
6  *
7  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * Duck TrueMotion2 decoder.
25  */
26 
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 
70 
71  /* TM2 streams */
76  /* for blocks decoding */
77  int D[4];
78  int CD[4];
79  int *last;
80  int *clast;
81 
82  /* data for current and previous frame */
84  int *Y1, *U1, *V1, *Y2, *U2, *V2;
86  int cur;
87 } TM2Context;
88 
89 /**
90 * Huffman codes for each of streams
91 */
92 typedef struct TM2Codes {
93  VLC vlc; ///< table for FFmpeg bitstream reader
94  int bits;
95  int *recode; ///< table for converting from code indexes to values
96  int length;
97 } TM2Codes;
98 
99 /**
100 * structure for gathering Huffman codes information
101 */
102 typedef struct TM2Huff {
103  int val_bits; ///< length of literal
104  int max_bits; ///< maximum length of code
105  int min_bits; ///< minimum length of code
106  int nodes; ///< total number of nodes in tree
107  int num; ///< current number filled
108  int max_num; ///< total number of codes
109  int *nums; ///< literals
110  uint32_t *bits; ///< codes
111  int *lens; ///< codelengths
112 } TM2Huff;
113 
114 static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
115 {
116  int ret;
117  if (length > huff->max_bits) {
118  av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n",
119  huff->max_bits);
120  return AVERROR_INVALIDDATA;
121  }
122 
123  if (!get_bits1(&ctx->gb)) { /* literal */
124  if (length == 0) {
125  length = 1;
126  }
127  if (huff->num >= huff->max_num) {
128  av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
129  return AVERROR_INVALIDDATA;
130  }
131  huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits);
132  huff->bits[huff->num] = prefix;
133  huff->lens[huff->num] = length;
134  huff->num++;
135  return 0;
136  } else { /* non-terminal node */
137  if ((ret = tm2_read_tree(ctx, prefix << 1, length + 1, huff)) < 0)
138  return ret;
139  if ((ret = tm2_read_tree(ctx, (prefix << 1) | 1, length + 1, huff)) < 0)
140  return ret;
141  }
142  return 0;
143 }
144 
146 {
147  TM2Huff huff;
148  int res = 0;
149 
150  huff.val_bits = get_bits(&ctx->gb, 5);
151  huff.max_bits = get_bits(&ctx->gb, 5);
152  huff.min_bits = get_bits(&ctx->gb, 5);
153  huff.nodes = get_bits_long(&ctx->gb, 17);
154  huff.num = 0;
155 
156  /* check for correct codes parameters */
157  if ((huff.val_bits < 1) || (huff.val_bits > 32) ||
158  (huff.max_bits < 0) || (huff.max_bits > 25)) {
159  av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal "
160  "length: %i, max code length: %i\n", huff.val_bits, huff.max_bits);
161  return AVERROR_INVALIDDATA;
162  }
163  if ((huff.nodes <= 0) || (huff.nodes > 0x10000)) {
164  av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree "
165  "nodes: %i\n", huff.nodes);
166  return AVERROR_INVALIDDATA;
167  }
168  /* one-node tree */
169  if (huff.max_bits == 0)
170  huff.max_bits = 1;
171 
172  /* allocate space for codes - it is exactly ceil(nodes / 2) entries */
173  huff.max_num = (huff.nodes + 1) >> 1;
174  huff.nums = av_calloc(huff.max_num, sizeof(int));
175  huff.bits = av_calloc(huff.max_num, sizeof(uint32_t));
176  huff.lens = av_calloc(huff.max_num, sizeof(int));
177 
178  if (!huff.nums || !huff.bits || !huff.lens) {
179  res = AVERROR(ENOMEM);
180  goto out;
181  }
182 
183  res = tm2_read_tree(ctx, 0, 0, &huff);
184 
185  if (huff.num != huff.max_num) {
186  av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n",
187  huff.num, huff.max_num);
188  res = AVERROR_INVALIDDATA;
189  }
190 
191  /* convert codes to vlc_table */
192  if (res >= 0) {
193  int i;
194 
195  res = init_vlc(&code->vlc, huff.max_bits, huff.max_num,
196  huff.lens, sizeof(int), sizeof(int),
197  huff.bits, sizeof(uint32_t), sizeof(uint32_t), 0);
198  if (res < 0)
199  av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
200  else {
201  code->bits = huff.max_bits;
202  code->length = huff.max_num;
203  code->recode = av_malloc_array(code->length, sizeof(int));
204  if (!code->recode) {
205  res = AVERROR(ENOMEM);
206  goto out;
207  }
208  for (i = 0; i < code->length; i++)
209  code->recode[i] = huff.nums[i];
210  }
211  }
212 
213 out:
214  /* free allocated memory */
215  av_free(huff.nums);
216  av_free(huff.bits);
217  av_free(huff.lens);
218 
219  return res;
220 }
221 
222 static void tm2_free_codes(TM2Codes *code)
223 {
224  av_free(code->recode);
225  if (code->vlc.table)
226  ff_free_vlc(&code->vlc);
227 }
228 
229 static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
230 {
231  int val;
232  val = get_vlc2(gb, code->vlc.table, code->bits, 1);
233  if(val<0)
234  return -1;
235  return code->recode[val];
236 }
237 
238 #define TM2_OLD_HEADER_MAGIC 0x00000100
239 #define TM2_NEW_HEADER_MAGIC 0x00000101
240 
241 static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
242 {
243  uint32_t magic = AV_RL32(buf);
244 
245  switch (magic) {
247  avpriv_request_sample(ctx->avctx, "Old TM2 header");
248  return 0;
250  return 0;
251  default:
252  av_log(ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08"PRIX32"\n",
253  magic);
254  return AVERROR_INVALIDDATA;
255  }
256 }
257 
258 static int tm2_read_deltas(TM2Context *ctx, int stream_id)
259 {
260  int d, mb;
261  int i, v;
262 
263  d = get_bits(&ctx->gb, 9);
264  mb = get_bits(&ctx->gb, 5);
265 
266  av_assert2(mb < 32);
267  if ((d < 1) || (d > TM2_DELTAS) || (mb < 1)) {
268  av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb);
269  return AVERROR_INVALIDDATA;
270  }
271 
272  for (i = 0; i < d; i++) {
273  v = get_bits_long(&ctx->gb, mb);
274  if (v & (1 << (mb - 1)))
275  ctx->deltas[stream_id][i] = v - (1 << mb);
276  else
277  ctx->deltas[stream_id][i] = v;
278  }
279  for (; i < TM2_DELTAS; i++)
280  ctx->deltas[stream_id][i] = 0;
281 
282  return 0;
283 }
284 
285 static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
286 {
287  int i, ret;
288  int skip = 0;
289  int len, toks, pos;
290  TM2Codes codes;
291  GetByteContext gb;
292 
293  if (buf_size < 4) {
294  av_log(ctx->avctx, AV_LOG_ERROR, "not enough space for len left\n");
295  return AVERROR_INVALIDDATA;
296  }
297 
298  /* get stream length in dwords */
299  bytestream2_init(&gb, buf, buf_size);
300  len = bytestream2_get_be32(&gb);
301  skip = len * 4 + 4;
302 
303  if (len == 0)
304  return 4;
305 
306  if (len >= INT_MAX / 4 - 1 || len < 0 || skip > buf_size) {
307  av_log(ctx->avctx, AV_LOG_ERROR, "Error, invalid stream size.\n");
308  return AVERROR_INVALIDDATA;
309  }
310 
311  toks = bytestream2_get_be32(&gb);
312  if (toks & 1) {
313  len = bytestream2_get_be32(&gb);
314  if (len == TM2_ESCAPE) {
315  len = bytestream2_get_be32(&gb);
316  }
317  if (len > 0) {
318  pos = bytestream2_tell(&gb);
319  if (skip <= pos)
320  return AVERROR_INVALIDDATA;
321  init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
322  if ((ret = tm2_read_deltas(ctx, stream_id)) < 0)
323  return ret;
324  bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
325  }
326  }
327  /* skip unused fields */
328  len = bytestream2_get_be32(&gb);
329  if (len == TM2_ESCAPE) { /* some unknown length - could be escaped too */
330  bytestream2_skip(&gb, 8); /* unused by decoder */
331  } else {
332  bytestream2_skip(&gb, 4); /* unused by decoder */
333  }
334 
335  pos = bytestream2_tell(&gb);
336  if (skip <= pos)
337  return AVERROR_INVALIDDATA;
338  init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
339  if ((ret = tm2_build_huff_table(ctx, &codes)) < 0)
340  return ret;
341  bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
342 
343  toks >>= 1;
344  /* check if we have sane number of tokens */
345  if ((toks < 0) || (toks > 0xFFFFFF)) {
346  av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
347  ret = AVERROR_INVALIDDATA;
348  goto end;
349  }
350  ret = av_reallocp_array(&ctx->tokens[stream_id], toks, sizeof(int));
351  if (ret < 0) {
352  ctx->tok_lens[stream_id] = 0;
353  goto end;
354  }
355  ctx->tok_lens[stream_id] = toks;
356  len = bytestream2_get_be32(&gb);
357  if (len > 0) {
358  pos = bytestream2_tell(&gb);
359  if (skip <= pos) {
360  ret = AVERROR_INVALIDDATA;
361  goto end;
362  }
363  init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
364  for (i = 0; i < toks; i++) {
365  if (get_bits_left(&ctx->gb) <= 0) {
366  av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
367  ret = AVERROR_INVALIDDATA;
368  goto end;
369  }
370  ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
371  if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS || ctx->tokens[stream_id][i]<0) {
372  av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
373  ctx->tokens[stream_id][i], stream_id, i);
374  ret = AVERROR_INVALIDDATA;
375  goto end;
376  }
377  }
378  } else {
379  for (i = 0; i < toks; i++) {
380  ctx->tokens[stream_id][i] = codes.recode[0];
381  if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) {
382  av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
383  ctx->tokens[stream_id][i], stream_id, i);
384  ret = AVERROR_INVALIDDATA;
385  goto end;
386  }
387  }
388  }
389 
390  ret = skip;
391 
392 end:
393  tm2_free_codes(&codes);
394  return ret;
395 }
396 
397 static inline int GET_TOK(TM2Context *ctx,int type)
398 {
399  if (ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
400  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]);
401  return 0;
402  }
403  if (type <= TM2_MOT) {
404  if (ctx->tokens[type][ctx->tok_ptrs[type]] >= TM2_DELTAS) {
405  av_log(ctx->avctx, AV_LOG_ERROR, "token %d is too large\n", ctx->tokens[type][ctx->tok_ptrs[type]]);
406  return 0;
407  }
408  return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
409  }
410  return ctx->tokens[type][ctx->tok_ptrs[type]++];
411 }
412 
413 /* blocks decoding routines */
414 
415 /* common Y, U, V pointers initialisation */
416 #define TM2_INIT_POINTERS() \
417  int *last, *clast; \
418  int *Y, *U, *V;\
419  int Ystride, Ustride, Vstride;\
420 \
421  Ystride = ctx->y_stride;\
422  Vstride = ctx->uv_stride;\
423  Ustride = ctx->uv_stride;\
424  Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
425  V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
426  U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
427  last = ctx->last + bx * 4;\
428  clast = ctx->clast + bx * 4;
429 
430 #define TM2_INIT_POINTERS_2() \
431  int *Yo, *Uo, *Vo;\
432  int oYstride, oUstride, oVstride;\
433 \
434  TM2_INIT_POINTERS();\
435  oYstride = Ystride;\
436  oVstride = Vstride;\
437  oUstride = Ustride;\
438  Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
439  Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
440  Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;
441 
442 /* recalculate last and delta values for next blocks */
443 #define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
444  CD[0] = CHR[1] - last[1];\
445  CD[1] = (int)CHR[stride + 1] - (int)CHR[1];\
446  last[0] = (int)CHR[stride + 0];\
447  last[1] = (int)CHR[stride + 1];}
448 
449 /* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */
450 static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
451 {
452  int ct, d;
453  int i, j;
454 
455  for (j = 0; j < 4; j++){
456  ct = ctx->D[j];
457  for (i = 0; i < 4; i++){
458  d = deltas[i + j * 4];
459  ct += d;
460  last[i] += ct;
461  Y[i] = av_clip_uint8(last[i]);
462  }
463  Y += stride;
464  ctx->D[j] = ct;
465  }
466 }
467 
468 static inline void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas)
469 {
470  int i, j;
471  for (j = 0; j < 2; j++) {
472  for (i = 0; i < 2; i++) {
473  CD[j] += deltas[i + j * 2];
474  last[i] += CD[j];
475  data[i] = last[i];
476  }
477  data += stride;
478  }
479 }
480 
481 static inline void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx)
482 {
483  int t;
484  int l;
485  int prev;
486 
487  if (bx > 0)
488  prev = clast[-3];
489  else
490  prev = 0;
491  t = (CD[0] + CD[1]) >> 1;
492  l = (prev - CD[0] - CD[1] + clast[1]) >> 1;
493  CD[1] = CD[0] + CD[1] - t;
494  CD[0] = t;
495  clast[0] = l;
496 
497  tm2_high_chroma(data, stride, clast, CD, deltas);
498 }
499 
500 static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
501 {
502  int i;
503  int deltas[16];
505 
506  /* hi-res chroma */
507  for (i = 0; i < 4; i++) {
508  deltas[i] = GET_TOK(ctx, TM2_C_HI);
509  deltas[i + 4] = GET_TOK(ctx, TM2_C_HI);
510  }
511  tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
512  tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
513 
514  /* hi-res luma */
515  for (i = 0; i < 16; i++)
516  deltas[i] = GET_TOK(ctx, TM2_L_HI);
517 
518  tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
519 }
520 
521 static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
522 {
523  int i;
524  int deltas[16];
526 
527  /* low-res chroma */
528  deltas[0] = GET_TOK(ctx, TM2_C_LO);
529  deltas[1] = deltas[2] = deltas[3] = 0;
530  tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
531 
532  deltas[0] = GET_TOK(ctx, TM2_C_LO);
533  deltas[1] = deltas[2] = deltas[3] = 0;
534  tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
535 
536  /* hi-res luma */
537  for (i = 0; i < 16; i++)
538  deltas[i] = GET_TOK(ctx, TM2_L_HI);
539 
540  tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
541 }
542 
543 static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
544 {
545  int i;
546  int t1, t2;
547  int deltas[16];
549 
550  /* low-res chroma */
551  deltas[0] = GET_TOK(ctx, TM2_C_LO);
552  deltas[1] = deltas[2] = deltas[3] = 0;
553  tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
554 
555  deltas[0] = GET_TOK(ctx, TM2_C_LO);
556  deltas[1] = deltas[2] = deltas[3] = 0;
557  tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
558 
559  /* low-res luma */
560  for (i = 0; i < 16; i++)
561  deltas[i] = 0;
562 
563  deltas[ 0] = GET_TOK(ctx, TM2_L_LO);
564  deltas[ 2] = GET_TOK(ctx, TM2_L_LO);
565  deltas[ 8] = GET_TOK(ctx, TM2_L_LO);
566  deltas[10] = GET_TOK(ctx, TM2_L_LO);
567 
568  if (bx > 0)
569  last[0] = (last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
570  else
571  last[0] = (last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
572  last[2] = (last[1] + last[3]) >> 1;
573 
574  t1 = ctx->D[0] + ctx->D[1];
575  ctx->D[0] = t1 >> 1;
576  ctx->D[1] = t1 - (t1 >> 1);
577  t2 = ctx->D[2] + ctx->D[3];
578  ctx->D[2] = t2 >> 1;
579  ctx->D[3] = t2 - (t2 >> 1);
580 
581  tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
582 }
583 
584 static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
585 {
586  int i;
587  int ct;
588  int left, right, diff;
589  int deltas[16];
591 
592  /* null chroma */
593  deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
594  tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
595 
596  deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
597  tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
598 
599  /* null luma */
600  for (i = 0; i < 16; i++)
601  deltas[i] = 0;
602 
603  ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
604 
605  if (bx > 0)
606  left = last[-1] - ct;
607  else
608  left = 0;
609 
610  right = last[3];
611  diff = right - left;
612  last[0] = left + (diff >> 2);
613  last[1] = left + (diff >> 1);
614  last[2] = right - (diff >> 2);
615  last[3] = right;
616  {
617  int tp = left;
618 
619  ctx->D[0] = (tp + (ct >> 2)) - left;
620  left += ctx->D[0];
621  ctx->D[1] = (tp + (ct >> 1)) - left;
622  left += ctx->D[1];
623  ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
624  left += ctx->D[2];
625  ctx->D[3] = (tp + ct) - left;
626  }
627  tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
628 }
629 
630 static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
631 {
632  int i, j;
634 
635  /* update chroma */
636  for (j = 0; j < 2; j++) {
637  for (i = 0; i < 2; i++){
638  U[i] = Uo[i];
639  V[i] = Vo[i];
640  }
641  U += Ustride; V += Vstride;
642  Uo += oUstride; Vo += oVstride;
643  }
644  U -= Ustride * 2;
645  V -= Vstride * 2;
646  TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
647  TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
648 
649  /* update deltas */
650  ctx->D[0] = Yo[3] - last[3];
651  ctx->D[1] = Yo[3 + oYstride] - Yo[3];
652  ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
653  ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
654 
655  for (j = 0; j < 4; j++) {
656  for (i = 0; i < 4; i++) {
657  Y[i] = Yo[i];
658  last[i] = Yo[i];
659  }
660  Y += Ystride;
661  Yo += oYstride;
662  }
663 }
664 
665 static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
666 {
667  int i, j;
668  int d;
670 
671  /* update chroma */
672  for (j = 0; j < 2; j++) {
673  for (i = 0; i < 2; i++) {
674  U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
675  V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
676  }
677  U += Ustride;
678  V += Vstride;
679  Uo += oUstride;
680  Vo += oVstride;
681  }
682  U -= Ustride * 2;
683  V -= Vstride * 2;
684  TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
685  TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
686 
687  /* update deltas */
688  ctx->D[0] = Yo[3] - last[3];
689  ctx->D[1] = Yo[3 + oYstride] - Yo[3];
690  ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
691  ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
692 
693  for (j = 0; j < 4; j++) {
694  d = last[3];
695  for (i = 0; i < 4; i++) {
696  Y[i] = Yo[i] + GET_TOK(ctx, TM2_UPD);
697  last[i] = Y[i];
698  }
699  ctx->D[j] = last[3] - d;
700  Y += Ystride;
701  Yo += oYstride;
702  }
703 }
704 
705 static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
706 {
707  int i, j;
708  int mx, my;
710 
711  mx = GET_TOK(ctx, TM2_MOT);
712  my = GET_TOK(ctx, TM2_MOT);
713  mx = av_clip(mx, -(bx * 4 + 4), ctx->avctx->width - bx * 4);
714  my = av_clip(my, -(by * 4 + 4), ctx->avctx->height - by * 4);
715 
716  if (4*bx+mx<0 || 4*by+my<0 || 4*bx+mx+4 > ctx->avctx->width || 4*by+my+4 > ctx->avctx->height) {
717  av_log(ctx->avctx, AV_LOG_ERROR, "MV out of picture\n");
718  return;
719  }
720 
721  Yo += my * oYstride + mx;
722  Uo += (my >> 1) * oUstride + (mx >> 1);
723  Vo += (my >> 1) * oVstride + (mx >> 1);
724 
725  /* copy chroma */
726  for (j = 0; j < 2; j++) {
727  for (i = 0; i < 2; i++) {
728  U[i] = Uo[i];
729  V[i] = Vo[i];
730  }
731  U += Ustride;
732  V += Vstride;
733  Uo += oUstride;
734  Vo += oVstride;
735  }
736  U -= Ustride * 2;
737  V -= Vstride * 2;
738  TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
739  TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
740 
741  /* copy luma */
742  for (j = 0; j < 4; j++) {
743  for (i = 0; i < 4; i++) {
744  Y[i] = Yo[i];
745  }
746  Y += Ystride;
747  Yo += oYstride;
748  }
749  /* calculate deltas */
750  Y -= Ystride * 4;
751  ctx->D[0] = Y[3] - last[3];
752  ctx->D[1] = Y[3 + Ystride] - Y[3];
753  ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride];
754  ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
755  for (i = 0; i < 4; i++)
756  last[i] = Y[i + Ystride * 3];
757 }
758 
760 {
761  int i, j;
762  int w = ctx->avctx->width, h = ctx->avctx->height, bw = w >> 2, bh = h >> 2, cw = w >> 1;
763  int type;
764  int keyframe = 1;
765  int *Y, *U, *V;
766  uint8_t *dst;
767 
768  for (i = 0; i < TM2_NUM_STREAMS; i++)
769  ctx->tok_ptrs[i] = 0;
770 
771  if (ctx->tok_lens[TM2_TYPE]<bw*bh) {
772  av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh);
773  return AVERROR_INVALIDDATA;
774  }
775 
776  memset(ctx->last, 0, 4 * bw * sizeof(int));
777  memset(ctx->clast, 0, 4 * bw * sizeof(int));
778 
779  for (j = 0; j < bh; j++) {
780  memset(ctx->D, 0, 4 * sizeof(int));
781  memset(ctx->CD, 0, 4 * sizeof(int));
782  for (i = 0; i < bw; i++) {
783  type = GET_TOK(ctx, TM2_TYPE);
784  switch(type) {
785  case TM2_HI_RES:
786  tm2_hi_res_block(ctx, p, i, j);
787  break;
788  case TM2_MED_RES:
789  tm2_med_res_block(ctx, p, i, j);
790  break;
791  case TM2_LOW_RES:
792  tm2_low_res_block(ctx, p, i, j);
793  break;
794  case TM2_NULL_RES:
795  tm2_null_res_block(ctx, p, i, j);
796  break;
797  case TM2_UPDATE:
798  tm2_update_block(ctx, p, i, j);
799  keyframe = 0;
800  break;
801  case TM2_STILL:
802  tm2_still_block(ctx, p, i, j);
803  keyframe = 0;
804  break;
805  case TM2_MOTION:
806  tm2_motion_block(ctx, p, i, j);
807  keyframe = 0;
808  break;
809  default:
810  av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
811  }
812  }
813  }
814 
815  /* copy data from our buffer to AVFrame */
816  Y = (ctx->cur?ctx->Y2:ctx->Y1);
817  U = (ctx->cur?ctx->U2:ctx->U1);
818  V = (ctx->cur?ctx->V2:ctx->V1);
819  dst = p->data[0];
820  for (j = 0; j < h; j++) {
821  for (i = 0; i < w; i++) {
822  int y = Y[i], u = U[i >> 1], v = V[i >> 1];
823  dst[3*i+0] = av_clip_uint8(y + v);
824  dst[3*i+1] = av_clip_uint8(y);
825  dst[3*i+2] = av_clip_uint8(y + u);
826  }
827 
828  /* horizontal edge extension */
829  Y[-4] = Y[-3] = Y[-2] = Y[-1] = Y[0];
830  Y[w + 3] = Y[w + 2] = Y[w + 1] = Y[w] = Y[w - 1];
831 
832  /* vertical edge extension */
833  if (j == 0) {
834  memcpy(Y - 4 - 1 * ctx->y_stride, Y - 4, ctx->y_stride);
835  memcpy(Y - 4 - 2 * ctx->y_stride, Y - 4, ctx->y_stride);
836  memcpy(Y - 4 - 3 * ctx->y_stride, Y - 4, ctx->y_stride);
837  memcpy(Y - 4 - 4 * ctx->y_stride, Y - 4, ctx->y_stride);
838  } else if (j == h - 1) {
839  memcpy(Y - 4 + 1 * ctx->y_stride, Y - 4, ctx->y_stride);
840  memcpy(Y - 4 + 2 * ctx->y_stride, Y - 4, ctx->y_stride);
841  memcpy(Y - 4 + 3 * ctx->y_stride, Y - 4, ctx->y_stride);
842  memcpy(Y - 4 + 4 * ctx->y_stride, Y - 4, ctx->y_stride);
843  }
844 
845  Y += ctx->y_stride;
846  if (j & 1) {
847  /* horizontal edge extension */
848  U[-2] = U[-1] = U[0];
849  V[-2] = V[-1] = V[0];
850  U[cw + 1] = U[cw] = U[cw - 1];
851  V[cw + 1] = V[cw] = V[cw - 1];
852 
853  /* vertical edge extension */
854  if (j == 1) {
855  memcpy(U - 2 - 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
856  memcpy(V - 2 - 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
857  memcpy(U - 2 - 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
858  memcpy(V - 2 - 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
859  } else if (j == h - 1) {
860  memcpy(U - 2 + 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
861  memcpy(V - 2 + 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
862  memcpy(U - 2 + 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
863  memcpy(V - 2 + 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
864  }
865 
866  U += ctx->uv_stride;
867  V += ctx->uv_stride;
868  }
869  dst += p->linesize[0];
870  }
871 
872  return keyframe;
873 }
874 
875 static const int tm2_stream_order[TM2_NUM_STREAMS] = {
877 };
878 
879 #define TM2_HEADER_SIZE 40
880 
881 static int decode_frame(AVCodecContext *avctx,
882  void *data, int *got_frame,
883  AVPacket *avpkt)
884 {
885  TM2Context * const l = avctx->priv_data;
886  const uint8_t *buf = avpkt->data;
887  int buf_size = avpkt->size & ~3;
888  AVFrame * const p = l->pic;
889  int offset = TM2_HEADER_SIZE;
890  int i, t, ret;
891 
892  av_fast_padded_malloc(&l->buffer, &l->buffer_size, buf_size);
893  if (!l->buffer) {
894  av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");
895  return AVERROR(ENOMEM);
896  }
897 
898  if ((ret = ff_reget_buffer(avctx, p)) < 0)
899  return ret;
900 
901  l->bdsp.bswap_buf((uint32_t *) l->buffer, (const uint32_t *) buf,
902  buf_size >> 2);
903 
904  if ((ret = tm2_read_header(l, l->buffer)) < 0) {
905  return ret;
906  }
907 
908  for (i = 0; i < TM2_NUM_STREAMS; i++) {
909  if (offset >= buf_size) {
910  av_log(avctx, AV_LOG_ERROR, "no space for tm2_read_stream\n");
911  return AVERROR_INVALIDDATA;
912  }
913 
914  t = tm2_read_stream(l, l->buffer + offset, tm2_stream_order[i],
915  buf_size - offset);
916  if (t < 0) {
917  int j = tm2_stream_order[i];
918  memset(l->tokens[j], 0, sizeof(**l->tokens) * l->tok_lens[j]);
919  return t;
920  }
921  offset += t;
922  }
923  p->key_frame = tm2_decode_blocks(l, p);
924  if (p->key_frame)
926  else
928 
929  l->cur = !l->cur;
930  *got_frame = 1;
931  ret = av_frame_ref(data, l->pic);
932 
933  return (ret < 0) ? ret : buf_size;
934 }
935 
937 {
938  TM2Context * const l = avctx->priv_data;
939  int i, w = avctx->width, h = avctx->height;
940 
941  if ((avctx->width & 3) || (avctx->height & 3)) {
942  av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
943  return AVERROR(EINVAL);
944  }
945 
946  l->avctx = avctx;
947  avctx->pix_fmt = AV_PIX_FMT_BGR24;
948 
949  l->pic = av_frame_alloc();
950  if (!l->pic)
951  return AVERROR(ENOMEM);
952 
953  ff_bswapdsp_init(&l->bdsp);
954 
955  l->last = av_malloc_array(w >> 2, 4 * sizeof(*l->last) );
956  l->clast = av_malloc_array(w >> 2, 4 * sizeof(*l->clast));
957 
958  for (i = 0; i < TM2_NUM_STREAMS; i++) {
959  l->tokens[i] = NULL;
960  l->tok_lens[i] = 0;
961  }
962 
963  w += 8;
964  h += 8;
965  l->Y1_base = av_calloc(w * h, sizeof(*l->Y1_base));
966  l->Y2_base = av_calloc(w * h, sizeof(*l->Y2_base));
967  l->y_stride = w;
968  w = (w + 1) >> 1;
969  h = (h + 1) >> 1;
970  l->U1_base = av_calloc(w * h, sizeof(*l->U1_base));
971  l->V1_base = av_calloc(w * h, sizeof(*l->V1_base));
972  l->U2_base = av_calloc(w * h, sizeof(*l->U2_base));
973  l->V2_base = av_calloc(w * h, sizeof(*l->V1_base));
974  l->uv_stride = w;
975  l->cur = 0;
976  if (!l->Y1_base || !l->Y2_base || !l->U1_base ||
977  !l->V1_base || !l->U2_base || !l->V2_base ||
978  !l->last || !l->clast) {
979  av_freep(&l->Y1_base);
980  av_freep(&l->Y2_base);
981  av_freep(&l->U1_base);
982  av_freep(&l->U2_base);
983  av_freep(&l->V1_base);
984  av_freep(&l->V2_base);
985  av_freep(&l->last);
986  av_freep(&l->clast);
987  av_frame_free(&l->pic);
988  return AVERROR(ENOMEM);
989  }
990  l->Y1 = l->Y1_base + l->y_stride * 4 + 4;
991  l->Y2 = l->Y2_base + l->y_stride * 4 + 4;
992  l->U1 = l->U1_base + l->uv_stride * 2 + 2;
993  l->U2 = l->U2_base + l->uv_stride * 2 + 2;
994  l->V1 = l->V1_base + l->uv_stride * 2 + 2;
995  l->V2 = l->V2_base + l->uv_stride * 2 + 2;
996 
997  return 0;
998 }
999 
1001 {
1002  TM2Context * const l = avctx->priv_data;
1003  int i;
1004 
1005  av_free(l->last);
1006  av_free(l->clast);
1007  for (i = 0; i < TM2_NUM_STREAMS; i++)
1008  av_freep(&l->tokens[i]);
1009  if (l->Y1) {
1010  av_freep(&l->Y1_base);
1011  av_freep(&l->U1_base);
1012  av_freep(&l->V1_base);
1013  av_freep(&l->Y2_base);
1014  av_freep(&l->U2_base);
1015  av_freep(&l->V2_base);
1016  }
1017  av_freep(&l->buffer);
1018  l->buffer_size = 0;
1019 
1020  av_frame_free(&l->pic);
1021 
1022  return 0;
1023 }
1024 
1026  .name = "truemotion2",
1027  .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"),
1028  .type = AVMEDIA_TYPE_VIDEO,
1030  .priv_data_size = sizeof(TM2Context),
1031  .init = decode_init,
1032  .close = decode_end,
1033  .decode = decode_frame,
1034  .capabilities = AV_CODEC_CAP_DR1,
1035 };
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
Definition: bswapdsp.h:25
#define NULL
Definition: coverity.c:32
static void tm2_low_chroma(int *data, int stride, int *clast, int *CD, int *deltas, int bx)
Definition: truemotion2.c:481
const char const char void * val
Definition: avisynth_c.h:634
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:180
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
AVFormatContext * ctx
Definition: movenc-test.c:48
int * V2
Definition: truemotion2.c:84
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:260
int * U1_base
Definition: truemotion2.c:83
int D[4]
Definition: truemotion2.c:77
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int * last
Definition: truemotion2.c:79
int * recode
table for converting from code indexes to values
Definition: truemotion2.c:95
int size
Definition: avcodec.h:1578
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1870
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:120
AVCodec ff_truemotion2_decoder
Definition: truemotion2.c:1025
AVCodec.
Definition: avcodec.h:3535
int num
current number filled
Definition: truemotion2.c:107
static int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
Definition: truemotion2.c:241
#define TM2_HEADER_SIZE
Definition: truemotion2.c:879
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:102
uint8_t
#define av_cold
Definition: attributes.h:82
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:140
#define mb
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:63
#define Y
Definition: vf_boxblur.c:76
TM2_STREAMS
Definition: truemotion2.c:39
static const int tm2_stream_order[TM2_NUM_STREAMS]
Definition: truemotion2.c:875
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
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:374
int max_bits
maximum length of code
Definition: truemotion2.c:104
static int tm2_read_deltas(TM2Context *ctx, int stream_id)
Definition: truemotion2.c:258
static void tm2_free_codes(TM2Codes *code)
Definition: truemotion2.c:222
uint8_t * data
Definition: avcodec.h:1577
int min_bits
minimum length of code
Definition: truemotion2.c:105
int * U2
Definition: truemotion2.c:84
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:212
static int tm2_read_tree(TM2Context *ctx, uint32_t prefix, int length, TM2Huff *huff)
Definition: truemotion2.c:114
VLC vlc
table for FFmpeg bitstream reader
Definition: truemotion2.c:93
bitstream reader API header.
static void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:500
static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
Definition: truemotion2.c:285
#define av_log(a,...)
static void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:665
#define U(x)
Definition: vp56_arith.h:37
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:607
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:215
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int val_bits
length of literal
Definition: truemotion2.c:103
#define AVERROR(e)
Definition: error.h:43
static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
Definition: truemotion2.c:145
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:164
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:153
static void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:543
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
Definition: truemotion2.c:759
int * tokens[TM2_NUM_STREAMS]
Definition: truemotion2.c:72
#define t1
Definition: regdef.h:29
GLsizei GLsizei * length
Definition: opengl_enc.c:115
const char * name
Name of the codec implementation.
Definition: avcodec.h:3542
int * clast
Definition: truemotion2.c:80
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
Definition: get_bits.h:63
AVFrame * pic
Definition: truemotion2.c:63
int * V1
Definition: truemotion2.c:84
int * V2_base
Definition: truemotion2.c:83
int max_num
total number of codes
Definition: truemotion2.c:108
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:977
int bits
Definition: truemotion2.c:94
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:254
static int GET_TOK(TM2Context *ctx, int type)
Definition: truemotion2.c:397
int width
picture width / height.
Definition: avcodec.h:1829
#define TM2_OLD_HEADER_MAGIC
Definition: truemotion2.c:238
int uv_stride
Definition: truemotion2.c:85
uint8_t * buffer
Definition: truemotion2.c:68
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:574
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:65
static int tm2_get_token(GetBitContext *gb, TM2Codes *code)
Definition: truemotion2.c:229
int CD[4]
Definition: truemotion2.c:78
int * nums
literals
Definition: truemotion2.c:109
int nodes
total number of nodes in tree
Definition: truemotion2.c:106
static av_cold int decode_end(AVCodecContext *avctx)
Definition: truemotion2.c:1000
int * Y1
Definition: truemotion2.c:84
FILE * out
Definition: movenc-test.c:54
int * V1_base
Definition: truemotion2.c:83
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:188
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:211
#define TM2_INIT_POINTERS_2()
Definition: truemotion2.c:430
main external API structure.
Definition: avcodec.h:1642
static void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:630
#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:465
void * buf
Definition: avisynth_c.h:553
GLint GLenum type
Definition: opengl_enc.c:105
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:312
#define TM2_INIT_POINTERS()
Definition: truemotion2.c:416
int * Y1_base
Definition: truemotion2.c:83
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:418
static void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:521
static void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:705
uint32_t * bits
codes
Definition: truemotion2.c:110
int length
Definition: truemotion2.c:96
#define u(width,...)
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:345
static void tm2_apply_deltas(TM2Context *ctx, int *Y, int stride, int *deltas, int *last)
Definition: truemotion2.c:450
#define TM2_ESCAPE
Definition: truemotion2.c:35
void * av_calloc(size_t nmemb, size_t size)
Allocate a block of nmemb * size bytes with alignment suitable for all memory accesses (including vec...
Definition: mem.c:260
#define TM2_RECALC_BLOCK(CHR, stride, last, CD)
Definition: truemotion2.c:443
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:194
int * U1
Definition: truemotion2.c:84
int * Y2
Definition: truemotion2.c:84
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:722
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:282
int y_stride
Definition: truemotion2.c:85
static void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:584
int deltas[TM2_NUM_STREAMS][TM2_DELTAS]
Definition: truemotion2.c:75
int * lens
codelengths
Definition: truemotion2.c:111
static av_cold int decode_init(AVCodecContext *avctx)
Definition: truemotion2.c:936
int * Y2_base
Definition: truemotion2.c:83
int buffer_size
Definition: truemotion2.c:69
#define TM2_NEW_HEADER_MAGIC
Definition: truemotion2.c:239
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
Definition: bswapdsp.c:49
void * priv_data
Definition: avcodec.h:1684
int * U2_base
Definition: truemotion2.c:83
TM2_BLOCKS
Definition: truemotion2.c:51
static av_always_inline int diff(const uint32_t a, const uint32_t b)
#define av_free(p)
GetBitContext gb
Definition: truemotion2.c:65
int len
VLC_TYPE(* table)[2]
code, bits
Definition: get_bits.h:65
int tok_lens[TM2_NUM_STREAMS]
Definition: truemotion2.c:73
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:249
static void tm2_high_chroma(int *data, int stride, int *last, int *CD, int *deltas)
Definition: truemotion2.c:468
#define av_freep(p)
Huffman codes for each of streams.
Definition: truemotion2.c:92
#define av_malloc_array(a, b)
#define stride
int tok_ptrs[TM2_NUM_STREAMS]
Definition: truemotion2.c:74
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1554
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:360
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:953
BswapDSPContext bdsp
Definition: truemotion2.c:66
#define t2
Definition: regdef.h:30
Predicted.
Definition: avutil.h:267
#define V
Definition: avdct.c:30
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: truemotion2.c:881