FFmpeg  4.4.5
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 
66  int error;
68 
71 
72  /* TM2 streams */
77  /* for blocks decoding */
78  int D[4];
79  int CD[4];
80  int *last;
81  int *clast;
82 
83  /* data for current and previous frame */
84  int *Y_base, *UV_base;
85  int *Y1, *U1, *V1, *Y2, *U2, *V2;
87  int cur;
88 } TM2Context;
89 
90 /**
91 * Huffman codes for each of streams
92 */
93 typedef struct TM2Codes {
94  VLC vlc; ///< table for FFmpeg bitstream reader
95  int bits;
96  int *recode; ///< table for converting from code indexes to values
97  int length;
98 } TM2Codes;
99 
100 /**
101 * structure for gathering Huffman codes information
102 */
103 typedef struct TM2Huff {
104  int val_bits; ///< length of literal
105  int max_bits; ///< maximum length of code
106  int min_bits; ///< minimum length of code
107  int nodes; ///< total number of nodes in tree
108  int num; ///< current number filled
109  int max_num; ///< total number of codes
110  int *nums; ///< literals
111  uint8_t *lens; ///< codelengths
112 } TM2Huff;
113 
114 /**
115  *
116  * @returns the length of the longest code or an AVERROR code
117  */
118 static int tm2_read_tree(TM2Context *ctx, int length, TM2Huff *huff)
119 {
120  int ret, ret2;
121  if (length > huff->max_bits) {
122  av_log(ctx->avctx, AV_LOG_ERROR, "Tree exceeded its given depth (%i)\n",
123  huff->max_bits);
124  return AVERROR_INVALIDDATA;
125  }
126 
127  if (!get_bits1(&ctx->gb)) { /* literal */
128  if (length == 0) {
129  length = 1;
130  }
131  if (huff->num >= huff->max_num) {
132  av_log(ctx->avctx, AV_LOG_DEBUG, "Too many literals\n");
133  return AVERROR_INVALIDDATA;
134  }
135  huff->nums[huff->num] = get_bits_long(&ctx->gb, huff->val_bits);
136  huff->lens[huff->num] = length;
137  huff->num++;
138  return length;
139  } else { /* non-terminal node */
140  if ((ret2 = tm2_read_tree(ctx, length + 1, huff)) < 0)
141  return ret2;
142  if ((ret = tm2_read_tree(ctx, length + 1, huff)) < 0)
143  return ret;
144  }
145  return FFMAX(ret, ret2);
146 }
147 
149 {
150  TM2Huff huff;
151  int res = 0;
152 
153  huff.val_bits = get_bits(&ctx->gb, 5);
154  huff.max_bits = get_bits(&ctx->gb, 5);
155  huff.min_bits = get_bits(&ctx->gb, 5);
156  huff.nodes = get_bits(&ctx->gb, 17);
157  huff.num = 0;
158 
159  /* check for correct codes parameters */
160  if ((huff.val_bits < 1) || (huff.val_bits > 32) ||
161  (huff.max_bits < 0) || (huff.max_bits > 25)) {
162  av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect tree parameters - literal "
163  "length: %i, max code length: %i\n", huff.val_bits, huff.max_bits);
164  return AVERROR_INVALIDDATA;
165  }
166  if ((huff.nodes <= 0) || (huff.nodes > 0x10000)) {
167  av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of Huffman tree "
168  "nodes: %i\n", huff.nodes);
169  return AVERROR_INVALIDDATA;
170  }
171  /* one-node tree */
172  if (huff.max_bits == 0)
173  huff.max_bits = 1;
174 
175  /* allocate space for codes - it is exactly ceil(nodes / 2) entries */
176  huff.max_num = (huff.nodes + 1) >> 1;
177  huff.nums = av_calloc(huff.max_num, sizeof(int));
178  huff.lens = av_mallocz(huff.max_num);
179 
180  if (!huff.nums || !huff.lens) {
181  res = AVERROR(ENOMEM);
182  goto out;
183  }
184 
185  res = tm2_read_tree(ctx, 0, &huff);
186 
187  if (res >= 0 && res != huff.max_bits) {
188  av_log(ctx->avctx, AV_LOG_ERROR, "Got less bits than expected: %i of %i\n",
189  res, huff.max_bits);
190  res = AVERROR_INVALIDDATA;
191  }
192  if (huff.num != huff.max_num) {
193  av_log(ctx->avctx, AV_LOG_ERROR, "Got less codes than expected: %i of %i\n",
194  huff.num, huff.max_num);
195  res = AVERROR_INVALIDDATA;
196  }
197 
198  /* convert codes to vlc_table */
199  if (res >= 0) {
200  res = ff_init_vlc_from_lengths(&code->vlc, huff.max_bits, huff.max_num,
201  huff.lens, sizeof(huff.lens[0]),
202  NULL, 0, 0, 0, 0, ctx->avctx);
203  if (res < 0)
204  av_log(ctx->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
205  else {
206  code->bits = huff.max_bits;
207  code->length = huff.max_num;
208  code->recode = huff.nums;
209  huff.nums = NULL;
210  }
211  }
212 
213 out:
214  /* free allocated memory */
215  av_free(huff.nums);
216  av_free(huff.lens);
217 
218  return res;
219 }
220 
222 {
223  av_free(code->recode);
224  if (code->vlc.table)
225  ff_free_vlc(&code->vlc);
226 }
227 
228 static inline int tm2_get_token(GetBitContext *gb, TM2Codes *code)
229 {
230  int val;
231  val = get_vlc2(gb, code->vlc.table, code->bits, 1);
232  if(val<0)
233  return -1;
234  return code->recode[val];
235 }
236 
237 #define TM2_OLD_HEADER_MAGIC 0x00000100
238 #define TM2_NEW_HEADER_MAGIC 0x00000101
239 
240 static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
241 {
242  uint32_t magic = AV_RL32(buf);
243 
244  switch (magic) {
246  avpriv_request_sample(ctx->avctx, "Old TM2 header");
247  return 0;
249  return 0;
250  default:
251  av_log(ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08"PRIX32"\n",
252  magic);
253  return AVERROR_INVALIDDATA;
254  }
255 }
256 
257 static int tm2_read_deltas(TM2Context *ctx, int stream_id)
258 {
259  int d, mb;
260  int i, v;
261 
262  d = get_bits(&ctx->gb, 9);
263  mb = get_bits(&ctx->gb, 5);
264 
265  av_assert2(mb < 32);
266  if ((d < 1) || (d > TM2_DELTAS) || (mb < 1)) {
267  av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect delta table: %i deltas x %i bits\n", d, mb);
268  return AVERROR_INVALIDDATA;
269  }
270 
271  for (i = 0; i < d; i++) {
272  v = get_bits_long(&ctx->gb, mb);
273  if (v & (1 << (mb - 1)))
274  ctx->deltas[stream_id][i] = v - (1U << mb);
275  else
276  ctx->deltas[stream_id][i] = v;
277  }
278  for (; i < TM2_DELTAS; i++)
279  ctx->deltas[stream_id][i] = 0;
280 
281  return 0;
282 }
283 
284 static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
285 {
286  int i, ret;
287  int skip = 0;
288  int len, toks, pos;
289  TM2Codes codes;
290  GetByteContext gb;
291 
292  if (buf_size < 4) {
293  av_log(ctx->avctx, AV_LOG_ERROR, "not enough space for len left\n");
294  return AVERROR_INVALIDDATA;
295  }
296 
297  /* get stream length in dwords */
298  bytestream2_init(&gb, buf, buf_size);
299  len = bytestream2_get_be32(&gb);
300 
301  if (len == 0)
302  return 4;
303 
304  if (len >= INT_MAX / 4 - 1 || len < 0 || len * 4 + 4 > buf_size) {
305  av_log(ctx->avctx, AV_LOG_ERROR, "Error, invalid stream size.\n");
306  return AVERROR_INVALIDDATA;
307  }
308  skip = len * 4 + 4;
309 
310  toks = bytestream2_get_be32(&gb);
311  if (toks & 1) {
312  len = bytestream2_get_be32(&gb);
313  if (len == TM2_ESCAPE) {
314  len = bytestream2_get_be32(&gb);
315  }
316  if (len > 0) {
317  pos = bytestream2_tell(&gb);
318  if (skip <= pos)
319  return AVERROR_INVALIDDATA;
320  init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
321  if ((ret = tm2_read_deltas(ctx, stream_id)) < 0)
322  return ret;
323  bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
324  }
325  }
326  /* skip unused fields */
327  len = bytestream2_get_be32(&gb);
328  if (len == TM2_ESCAPE) { /* some unknown length - could be escaped too */
329  bytestream2_skip(&gb, 8); /* unused by decoder */
330  } else {
331  bytestream2_skip(&gb, 4); /* unused by decoder */
332  }
333 
334  pos = bytestream2_tell(&gb);
335  if (skip <= pos)
336  return AVERROR_INVALIDDATA;
337  init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
338  if ((ret = tm2_build_huff_table(ctx, &codes)) < 0)
339  return ret;
340  bytestream2_skip(&gb, ((get_bits_count(&ctx->gb) + 31) >> 5) << 2);
341 
342  toks >>= 1;
343  /* check if we have sane number of tokens */
344  if ((toks < 0) || (toks > 0xFFFFFF)) {
345  av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
346  ret = AVERROR_INVALIDDATA;
347  goto end;
348  }
349  ret = av_reallocp_array(&ctx->tokens[stream_id], toks, sizeof(int));
350  if (ret < 0) {
351  ctx->tok_lens[stream_id] = 0;
352  goto end;
353  }
354  ctx->tok_lens[stream_id] = toks;
355  len = bytestream2_get_be32(&gb);
356  if (len > 0) {
357  pos = bytestream2_tell(&gb);
358  if (skip <= pos) {
359  ret = AVERROR_INVALIDDATA;
360  goto end;
361  }
362  init_get_bits(&ctx->gb, buf + pos, (skip - pos) * 8);
363  for (i = 0; i < toks; i++) {
364  if (get_bits_left(&ctx->gb) <= 0) {
365  av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect number of tokens: %i\n", toks);
366  ret = AVERROR_INVALIDDATA;
367  goto end;
368  }
369  ctx->tokens[stream_id][i] = tm2_get_token(&ctx->gb, &codes);
370  if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS || ctx->tokens[stream_id][i]<0) {
371  av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
372  ctx->tokens[stream_id][i], stream_id, i);
373  ret = AVERROR_INVALIDDATA;
374  goto end;
375  }
376  }
377  } else {
378  if (len < 0) {
379  ret = AVERROR_INVALIDDATA;
380  goto end;
381  }
382  for (i = 0; i < toks; i++) {
383  ctx->tokens[stream_id][i] = codes.recode[0];
384  if (stream_id <= TM2_MOT && ctx->tokens[stream_id][i] >= TM2_DELTAS) {
385  av_log(ctx->avctx, AV_LOG_ERROR, "Invalid delta token index %d for type %d, n=%d\n",
386  ctx->tokens[stream_id][i], stream_id, i);
387  ret = AVERROR_INVALIDDATA;
388  goto end;
389  }
390  }
391  }
392 
393  ret = skip;
394 
395 end:
396  tm2_free_codes(&codes);
397  return ret;
398 }
399 
400 static inline int GET_TOK(TM2Context *ctx,int type)
401 {
402  if (ctx->tok_ptrs[type] >= ctx->tok_lens[type]) {
403  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]);
404  ctx->error = 1;
405  return 0;
406  }
407  if (type <= TM2_MOT) {
408  if (ctx->tokens[type][ctx->tok_ptrs[type]] >= TM2_DELTAS) {
409  av_log(ctx->avctx, AV_LOG_ERROR, "token %d is too large\n", ctx->tokens[type][ctx->tok_ptrs[type]]);
410  return 0;
411  }
412  return ctx->deltas[type][ctx->tokens[type][ctx->tok_ptrs[type]++]];
413  }
414  return ctx->tokens[type][ctx->tok_ptrs[type]++];
415 }
416 
417 /* blocks decoding routines */
418 
419 /* common Y, U, V pointers initialisation */
420 #define TM2_INIT_POINTERS() \
421  int *last, *clast; \
422  int *Y, *U, *V;\
423  int Ystride, Ustride, Vstride;\
424 \
425  Ystride = ctx->y_stride;\
426  Vstride = ctx->uv_stride;\
427  Ustride = ctx->uv_stride;\
428  Y = (ctx->cur?ctx->Y2:ctx->Y1) + by * 4 * Ystride + bx * 4;\
429  V = (ctx->cur?ctx->V2:ctx->V1) + by * 2 * Vstride + bx * 2;\
430  U = (ctx->cur?ctx->U2:ctx->U1) + by * 2 * Ustride + bx * 2;\
431  last = ctx->last + bx * 4;\
432  clast = ctx->clast + bx * 4;
433 
434 #define TM2_INIT_POINTERS_2() \
435  unsigned *Yo, *Uo, *Vo;\
436  int oYstride, oUstride, oVstride;\
437 \
438  TM2_INIT_POINTERS();\
439  oYstride = Ystride;\
440  oVstride = Vstride;\
441  oUstride = Ustride;\
442  Yo = (ctx->cur?ctx->Y1:ctx->Y2) + by * 4 * oYstride + bx * 4;\
443  Vo = (ctx->cur?ctx->V1:ctx->V2) + by * 2 * oVstride + bx * 2;\
444  Uo = (ctx->cur?ctx->U1:ctx->U2) + by * 2 * oUstride + bx * 2;
445 
446 /* recalculate last and delta values for next blocks */
447 #define TM2_RECALC_BLOCK(CHR, stride, last, CD) {\
448  CD[0] = (unsigned)CHR[ 1] - (unsigned)last[1];\
449  CD[1] = (unsigned)CHR[stride + 1] - (unsigned) CHR[1];\
450  last[0] = (int)CHR[stride + 0];\
451  last[1] = (int)CHR[stride + 1];}
452 
453 /* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */
454 static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
455 {
456  unsigned ct, d;
457  int i, j;
458 
459  for (j = 0; j < 4; j++){
460  ct = ctx->D[j];
461  for (i = 0; i < 4; i++){
462  d = deltas[i + j * 4];
463  ct += d;
464  last[i] += ct;
465  Y[i] = av_clip_uint8(last[i]);
466  }
467  Y += stride;
468  ctx->D[j] = ct;
469  }
470 }
471 
472 static inline void tm2_high_chroma(int *data, int stride, int *last, unsigned *CD, int *deltas)
473 {
474  int i, j;
475  for (j = 0; j < 2; j++) {
476  for (i = 0; i < 2; i++) {
477  CD[j] += deltas[i + j * 2];
478  last[i] += CD[j];
479  data[i] = last[i];
480  }
481  data += stride;
482  }
483 }
484 
485 static inline void tm2_low_chroma(int *data, int stride, int *clast, unsigned *CD, int *deltas, int bx)
486 {
487  int t;
488  int l;
489  int prev;
490 
491  if (bx > 0)
492  prev = clast[-3];
493  else
494  prev = 0;
495  t = (int)(CD[0] + CD[1]) >> 1;
496  l = (int)(prev - CD[0] - CD[1] + clast[1]) >> 1;
497  CD[1] = CD[0] + CD[1] - t;
498  CD[0] = t;
499  clast[0] = l;
500 
501  tm2_high_chroma(data, stride, clast, CD, deltas);
502 }
503 
504 static inline void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
505 {
506  int i;
507  int deltas[16];
509 
510  /* hi-res chroma */
511  for (i = 0; i < 4; i++) {
512  deltas[i] = GET_TOK(ctx, TM2_C_HI);
513  deltas[i + 4] = GET_TOK(ctx, TM2_C_HI);
514  }
515  tm2_high_chroma(U, Ustride, clast, ctx->CD, deltas);
516  tm2_high_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas + 4);
517 
518  /* hi-res luma */
519  for (i = 0; i < 16; i++)
520  deltas[i] = GET_TOK(ctx, TM2_L_HI);
521 
522  tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
523 }
524 
525 static inline void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
526 {
527  int i;
528  int deltas[16];
530 
531  /* low-res chroma */
532  deltas[0] = GET_TOK(ctx, TM2_C_LO);
533  deltas[1] = deltas[2] = deltas[3] = 0;
534  tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
535 
536  deltas[0] = GET_TOK(ctx, TM2_C_LO);
537  deltas[1] = deltas[2] = deltas[3] = 0;
538  tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
539 
540  /* hi-res luma */
541  for (i = 0; i < 16; i++)
542  deltas[i] = GET_TOK(ctx, TM2_L_HI);
543 
544  tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
545 }
546 
547 static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
548 {
549  int i;
550  int t1, t2;
551  int deltas[16];
553 
554  /* low-res chroma */
555  deltas[0] = GET_TOK(ctx, TM2_C_LO);
556  deltas[1] = deltas[2] = deltas[3] = 0;
557  tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
558 
559  deltas[0] = GET_TOK(ctx, TM2_C_LO);
560  deltas[1] = deltas[2] = deltas[3] = 0;
561  tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
562 
563  /* low-res luma */
564  for (i = 0; i < 16; i++)
565  deltas[i] = 0;
566 
567  deltas[ 0] = GET_TOK(ctx, TM2_L_LO);
568  deltas[ 2] = GET_TOK(ctx, TM2_L_LO);
569  deltas[ 8] = GET_TOK(ctx, TM2_L_LO);
570  deltas[10] = GET_TOK(ctx, TM2_L_LO);
571 
572  if (bx > 0)
573  last[0] = (int)((unsigned)last[-1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3] + last[1]) >> 1;
574  else
575  last[0] = (int)((unsigned)last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
576  last[2] = (int)((unsigned)last[1] + last[3]) >> 1;
577 
578  t1 = ctx->D[0] + (unsigned)ctx->D[1];
579  ctx->D[0] = t1 >> 1;
580  ctx->D[1] = t1 - (t1 >> 1);
581  t2 = ctx->D[2] + (unsigned)ctx->D[3];
582  ctx->D[2] = t2 >> 1;
583  ctx->D[3] = t2 - (t2 >> 1);
584 
585  tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
586 }
587 
588 static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
589 {
590  int i;
591  int ct;
592  unsigned left, right;
593  int diff;
594  int deltas[16];
596 
597  /* null chroma */
598  deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
599  tm2_low_chroma(U, Ustride, clast, ctx->CD, deltas, bx);
600 
601  deltas[0] = deltas[1] = deltas[2] = deltas[3] = 0;
602  tm2_low_chroma(V, Vstride, clast + 2, ctx->CD + 2, deltas, bx);
603 
604  /* null luma */
605  for (i = 0; i < 16; i++)
606  deltas[i] = 0;
607 
608  ct = (unsigned)ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3];
609 
610  if (bx > 0)
611  left = last[-1] - (unsigned)ct;
612  else
613  left = 0;
614 
615  right = last[3];
616  diff = right - left;
617  last[0] = left + (diff >> 2);
618  last[1] = left + (diff >> 1);
619  last[2] = right - (diff >> 2);
620  last[3] = right;
621  {
622  unsigned tp = left;
623 
624  ctx->D[0] = (tp + (ct >> 2)) - left;
625  left += ctx->D[0];
626  ctx->D[1] = (tp + (ct >> 1)) - left;
627  left += ctx->D[1];
628  ctx->D[2] = ((tp + ct) - (ct >> 2)) - left;
629  left += ctx->D[2];
630  ctx->D[3] = (tp + ct) - left;
631  }
632  tm2_apply_deltas(ctx, Y, Ystride, deltas, last);
633 }
634 
635 static inline void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
636 {
637  int i, j;
639 
640  /* update chroma */
641  for (j = 0; j < 2; j++) {
642  for (i = 0; i < 2; i++){
643  U[i] = Uo[i];
644  V[i] = Vo[i];
645  }
646  U += Ustride; V += Vstride;
647  Uo += oUstride; Vo += oVstride;
648  }
649  U -= Ustride * 2;
650  V -= Vstride * 2;
651  TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
652  TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
653 
654  /* update deltas */
655  ctx->D[0] = Yo[3] - last[3];
656  ctx->D[1] = Yo[3 + oYstride] - Yo[3];
657  ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
658  ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
659 
660  for (j = 0; j < 4; j++) {
661  for (i = 0; i < 4; i++) {
662  Y[i] = Yo[i];
663  last[i] = Yo[i];
664  }
665  Y += Ystride;
666  Yo += oYstride;
667  }
668 }
669 
670 static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
671 {
672  int i, j;
673  unsigned d;
675 
676  /* update chroma */
677  for (j = 0; j < 2; j++) {
678  for (i = 0; i < 2; i++) {
679  U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
680  V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
681  }
682  U += Ustride;
683  V += Vstride;
684  Uo += oUstride;
685  Vo += oVstride;
686  }
687  U -= Ustride * 2;
688  V -= Vstride * 2;
689  TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
690  TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
691 
692  /* update deltas */
693  ctx->D[0] = Yo[3] - last[3];
694  ctx->D[1] = Yo[3 + oYstride] - Yo[3];
695  ctx->D[2] = Yo[3 + oYstride * 2] - Yo[3 + oYstride];
696  ctx->D[3] = Yo[3 + oYstride * 3] - Yo[3 + oYstride * 2];
697 
698  for (j = 0; j < 4; j++) {
699  d = last[3];
700  for (i = 0; i < 4; i++) {
701  Y[i] = Yo[i] + (unsigned)GET_TOK(ctx, TM2_UPD);
702  last[i] = Y[i];
703  }
704  ctx->D[j] = last[3] - d;
705  Y += Ystride;
706  Yo += oYstride;
707  }
708 }
709 
710 static inline void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
711 {
712  int i, j;
713  int mx, my;
715 
716  mx = GET_TOK(ctx, TM2_MOT);
717  my = GET_TOK(ctx, TM2_MOT);
718  mx = av_clip(mx, -(bx * 4 + 4), ctx->avctx->width - bx * 4);
719  my = av_clip(my, -(by * 4 + 4), ctx->avctx->height - by * 4);
720 
721  if (4*bx+mx<0 || 4*by+my<0 || 4*bx+mx+4 > ctx->avctx->width || 4*by+my+4 > ctx->avctx->height) {
722  av_log(ctx->avctx, AV_LOG_ERROR, "MV out of picture\n");
723  return;
724  }
725 
726  Yo += my * oYstride + mx;
727  Uo += (my >> 1) * oUstride + (mx >> 1);
728  Vo += (my >> 1) * oVstride + (mx >> 1);
729 
730  /* copy chroma */
731  for (j = 0; j < 2; j++) {
732  for (i = 0; i < 2; i++) {
733  U[i] = Uo[i];
734  V[i] = Vo[i];
735  }
736  U += Ustride;
737  V += Vstride;
738  Uo += oUstride;
739  Vo += oVstride;
740  }
741  U -= Ustride * 2;
742  V -= Vstride * 2;
743  TM2_RECALC_BLOCK(U, Ustride, clast, ctx->CD);
744  TM2_RECALC_BLOCK(V, Vstride, (clast + 2), (ctx->CD + 2));
745 
746  /* copy luma */
747  for (j = 0; j < 4; j++) {
748  for (i = 0; i < 4; i++) {
749  Y[i] = Yo[i];
750  }
751  Y += Ystride;
752  Yo += oYstride;
753  }
754  /* calculate deltas */
755  Y -= Ystride * 4;
756  ctx->D[0] = (unsigned)Y[3] - last[3];
757  ctx->D[1] = (unsigned)Y[3 + Ystride] - Y[3];
758  ctx->D[2] = (unsigned)Y[3 + Ystride * 2] - Y[3 + Ystride];
759  ctx->D[3] = (unsigned)Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
760  for (i = 0; i < 4; i++)
761  last[i] = Y[i + Ystride * 3];
762 }
763 
765 {
766  int i, j;
767  int w = ctx->avctx->width, h = ctx->avctx->height, bw = w >> 2, bh = h >> 2, cw = w >> 1;
768  int type;
769  int keyframe = 1;
770  int *Y, *U, *V;
771  uint8_t *dst;
772 
773  for (i = 0; i < TM2_NUM_STREAMS; i++)
774  ctx->tok_ptrs[i] = 0;
775 
776  if (ctx->tok_lens[TM2_TYPE]<bw*bh) {
777  av_log(ctx->avctx,AV_LOG_ERROR,"Got %i tokens for %i blocks\n",ctx->tok_lens[TM2_TYPE],bw*bh);
778  return AVERROR_INVALIDDATA;
779  }
780 
781  memset(ctx->last, 0, 4 * bw * sizeof(int));
782  memset(ctx->clast, 0, 4 * bw * sizeof(int));
783 
784  for (j = 0; j < bh; j++) {
785  memset(ctx->D, 0, 4 * sizeof(int));
786  memset(ctx->CD, 0, 4 * sizeof(int));
787  for (i = 0; i < bw; i++) {
788  type = GET_TOK(ctx, TM2_TYPE);
789  switch(type) {
790  case TM2_HI_RES:
791  tm2_hi_res_block(ctx, p, i, j);
792  break;
793  case TM2_MED_RES:
794  tm2_med_res_block(ctx, p, i, j);
795  break;
796  case TM2_LOW_RES:
797  tm2_low_res_block(ctx, p, i, j);
798  break;
799  case TM2_NULL_RES:
800  tm2_null_res_block(ctx, p, i, j);
801  break;
802  case TM2_UPDATE:
803  tm2_update_block(ctx, p, i, j);
804  keyframe = 0;
805  break;
806  case TM2_STILL:
807  tm2_still_block(ctx, p, i, j);
808  keyframe = 0;
809  break;
810  case TM2_MOTION:
811  tm2_motion_block(ctx, p, i, j);
812  keyframe = 0;
813  break;
814  default:
815  av_log(ctx->avctx, AV_LOG_ERROR, "Skipping unknown block type %i\n", type);
816  }
817  if (ctx->error)
818  return AVERROR_INVALIDDATA;
819  }
820  }
821 
822  /* copy data from our buffer to AVFrame */
823  Y = (ctx->cur?ctx->Y2:ctx->Y1);
824  U = (ctx->cur?ctx->U2:ctx->U1);
825  V = (ctx->cur?ctx->V2:ctx->V1);
826  dst = p->data[0];
827  for (j = 0; j < h; j++) {
828  for (i = 0; i < w; i++) {
829  unsigned y = Y[i], u = U[i >> 1], v = V[i >> 1];
830  dst[3*i+0] = av_clip_uint8(y + v);
831  dst[3*i+1] = av_clip_uint8(y);
832  dst[3*i+2] = av_clip_uint8(y + u);
833  }
834 
835  /* horizontal edge extension */
836  Y[-4] = Y[-3] = Y[-2] = Y[-1] = Y[0];
837  Y[w + 3] = Y[w + 2] = Y[w + 1] = Y[w] = Y[w - 1];
838 
839  /* vertical edge extension */
840  if (j == 0) {
841  memcpy(Y - 4 - 1 * ctx->y_stride, Y - 4, ctx->y_stride);
842  memcpy(Y - 4 - 2 * ctx->y_stride, Y - 4, ctx->y_stride);
843  memcpy(Y - 4 - 3 * ctx->y_stride, Y - 4, ctx->y_stride);
844  memcpy(Y - 4 - 4 * ctx->y_stride, Y - 4, ctx->y_stride);
845  } else if (j == h - 1) {
846  memcpy(Y - 4 + 1 * ctx->y_stride, Y - 4, ctx->y_stride);
847  memcpy(Y - 4 + 2 * ctx->y_stride, Y - 4, ctx->y_stride);
848  memcpy(Y - 4 + 3 * ctx->y_stride, Y - 4, ctx->y_stride);
849  memcpy(Y - 4 + 4 * ctx->y_stride, Y - 4, ctx->y_stride);
850  }
851 
852  Y += ctx->y_stride;
853  if (j & 1) {
854  /* horizontal edge extension */
855  U[-2] = U[-1] = U[0];
856  V[-2] = V[-1] = V[0];
857  U[cw + 1] = U[cw] = U[cw - 1];
858  V[cw + 1] = V[cw] = V[cw - 1];
859 
860  /* vertical edge extension */
861  if (j == 1) {
862  memcpy(U - 2 - 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
863  memcpy(V - 2 - 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
864  memcpy(U - 2 - 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
865  memcpy(V - 2 - 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
866  } else if (j == h - 1) {
867  memcpy(U - 2 + 1 * ctx->uv_stride, U - 2, ctx->uv_stride);
868  memcpy(V - 2 + 1 * ctx->uv_stride, V - 2, ctx->uv_stride);
869  memcpy(U - 2 + 2 * ctx->uv_stride, U - 2, ctx->uv_stride);
870  memcpy(V - 2 + 2 * ctx->uv_stride, V - 2, ctx->uv_stride);
871  }
872 
873  U += ctx->uv_stride;
874  V += ctx->uv_stride;
875  }
876  dst += p->linesize[0];
877  }
878 
879  return keyframe;
880 }
881 
882 static const int tm2_stream_order[TM2_NUM_STREAMS] = {
884 };
885 
886 #define TM2_HEADER_SIZE 40
887 
888 static int decode_frame(AVCodecContext *avctx,
889  void *data, int *got_frame,
890  AVPacket *avpkt)
891 {
892  TM2Context * const l = avctx->priv_data;
893  const uint8_t *buf = avpkt->data;
894  int buf_size = avpkt->size & ~3;
895  AVFrame * const p = l->pic;
896  int offset = TM2_HEADER_SIZE;
897  int i, t, ret;
898 
899  l->error = 0;
900 
901  av_fast_padded_malloc(&l->buffer, &l->buffer_size, buf_size);
902  if (!l->buffer) {
903  av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n");
904  return AVERROR(ENOMEM);
905  }
906 
907  if ((ret = ff_reget_buffer(avctx, p, 0)) < 0)
908  return ret;
909 
910  l->bdsp.bswap_buf((uint32_t *) l->buffer, (const uint32_t *) buf,
911  buf_size >> 2);
912 
913  if ((ret = tm2_read_header(l, l->buffer)) < 0) {
914  return ret;
915  }
916 
917  for (i = 0; i < TM2_NUM_STREAMS; i++) {
918  if (offset >= buf_size) {
919  av_log(avctx, AV_LOG_ERROR, "no space for tm2_read_stream\n");
920  return AVERROR_INVALIDDATA;
921  }
922 
924  buf_size - offset);
925  if (t < 0) {
926  int j = tm2_stream_order[i];
927  if (l->tok_lens[j])
928  memset(l->tokens[j], 0, sizeof(**l->tokens) * l->tok_lens[j]);
929  return t;
930  }
931  offset += t;
932  }
933  p->key_frame = tm2_decode_blocks(l, p);
934  if (p->key_frame)
936  else
938 
939  l->cur = !l->cur;
940  *got_frame = 1;
941  ret = av_frame_ref(data, l->pic);
942 
943  return (ret < 0) ? ret : buf_size;
944 }
945 
947 {
948  TM2Context * const l = avctx->priv_data;
949  int w = avctx->width, h = avctx->height;
950 
951  if ((avctx->width & 3) || (avctx->height & 3)) {
952  av_log(avctx, AV_LOG_ERROR, "Width and height must be multiple of 4\n");
953  return AVERROR(EINVAL);
954  }
955 
956  l->avctx = avctx;
957  avctx->pix_fmt = AV_PIX_FMT_BGR24;
958 
959  l->pic = av_frame_alloc();
960  if (!l->pic)
961  return AVERROR(ENOMEM);
962 
963  ff_bswapdsp_init(&l->bdsp);
964 
965  l->last = av_malloc_array(w, 2 * sizeof(*l->last));
966  if (!l->last)
967  return AVERROR(ENOMEM);
968  l->clast = l->last + w;
969 
970  w += 8;
971  h += 8;
972  l->Y_base = av_calloc(w * h, 2 * sizeof(*l->Y_base));
973  if (!l->Y_base)
974  return AVERROR(ENOMEM);
975  l->y_stride = w;
976  l->Y1 = l->Y_base + l->y_stride * 4 + 4;
977  l->Y2 = l->Y1 + w * h;
978  w = (w + 1) >> 1;
979  h = (h + 1) >> 1;
980  l->UV_base = av_calloc(w * h, 4 * sizeof(*l->UV_base));
981  if (!l->UV_base)
982  return AVERROR(ENOMEM);
983  l->uv_stride = w;
984  l->U1 = l->UV_base + l->uv_stride * 2 + 2;
985  l->U2 = l->U1 + w * h;
986  l->V1 = l->U2 + w * h;
987  l->V2 = l->V1 + w * h;
988 
989  return 0;
990 }
991 
993 {
994  TM2Context * const l = avctx->priv_data;
995  int i;
996 
997  av_freep(&l->last);
998  for (i = 0; i < TM2_NUM_STREAMS; i++)
999  av_freep(&l->tokens[i]);
1000 
1001  av_freep(&l->Y_base);
1002  av_freep(&l->UV_base);
1003  av_freep(&l->buffer);
1004  l->buffer_size = 0;
1005 
1006  av_frame_free(&l->pic);
1007 
1008  return 0;
1009 }
1010 
1012  .name = "truemotion2",
1013  .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0"),
1014  .type = AVMEDIA_TYPE_VIDEO,
1016  .priv_data_size = sizeof(TM2Context),
1017  .init = decode_init,
1018  .close = decode_end,
1019  .decode = decode_frame,
1020  .capabilities = AV_CODEC_CAP_DR1,
1022 };
static double val(void *priv, double ch)
Definition: aeval.c:76
#define U(x)
Definition: vp56_arith.h:37
#define av_cold
Definition: attributes.h:88
uint8_t
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
Libavcodec external API header.
#define V
Definition: avdct.c:30
#define AV_RL32
Definition: intreadwrite.h:146
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:431
int ff_init_vlc_from_lengths(VLC *vlc_arg, int nb_bits, int nb_codes, const int8_t *lens, int lens_wrap, const void *symbols, int symbols_wrap, int symbols_size, int offset, int flags, void *logctx)
Build VLC decoding tables suitable for use with get_vlc2()
Definition: bitstream.c:381
#define Y
Definition: boxblur.h:38
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:137
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:168
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:192
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:264
#define av_clip
Definition: common.h:122
#define FFMAX(a, b)
Definition: common.h:103
#define av_clip_uint8
Definition: common.h:128
#define NULL
Definition: coverity.c:32
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Identical in function to ff_get_buffer(), except it reuses the existing buffer if available.
Definition: decode.c:2007
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
int
bitstream reader API header.
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:546
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:797
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:659
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
@ AV_CODEC_ID_TRUEMOTION2
Definition: codec_id.h:126
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:50
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
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:443
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:190
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:245
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Allocate, reallocate, or free an array through a pointer to a pointer.
Definition: mem.c:206
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
@ AV_PICTURE_TYPE_P
Predicted.
Definition: avutil.h:275
cl_device_type type
int i
Definition: input.c:407
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
Definition: bswapdsp.c:49
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:41
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:49
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
uint8_t w
Definition: llviddspenc.c:39
int stride
Definition: mace.c:144
const char data[16]
Definition: mxf.c:142
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
#define t1
Definition: regdef.h:29
#define t2
Definition: regdef.h:30
const uint8_t * code
Definition: spdifenc.c:413
unsigned int pos
Definition: spdifenc.c:412
main external API structure.
Definition: avcodec.h:536
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:746
int width
picture width / height.
Definition: avcodec.h:709
void * priv_data
Definition: avcodec.h:563
AVCodec.
Definition: codec.h:197
const char * name
Name of the codec implementation.
Definition: codec.h:204
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:332
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:396
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:349
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:401
This structure stores compressed data.
Definition: packet.h:346
int size
Definition: packet.h:370
uint8_t * data
Definition: packet.h:369
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
Definition: bswapdsp.h:25
Huffman codes for each of streams.
Definition: truemotion2.c:93
int length
Definition: truemotion2.c:97
int bits
Definition: truemotion2.c:95
VLC vlc
table for FFmpeg bitstream reader
Definition: truemotion2.c:94
int * recode
table for converting from code indexes to values
Definition: truemotion2.c:96
int * Y_base
Definition: truemotion2.c:84
int CD[4]
Definition: truemotion2.c:79
int * U1
Definition: truemotion2.c:85
BswapDSPContext bdsp
Definition: truemotion2.c:67
int * UV_base
Definition: truemotion2.c:84
int * V2
Definition: truemotion2.c:85
int buffer_size
Definition: truemotion2.c:70
AVCodecContext * avctx
Definition: truemotion2.c:62
int * V1
Definition: truemotion2.c:85
int * U2
Definition: truemotion2.c:85
int * last
Definition: truemotion2.c:80
GetBitContext gb
Definition: truemotion2.c:65
int * tokens[TM2_NUM_STREAMS]
Definition: truemotion2.c:73
int deltas[TM2_NUM_STREAMS][TM2_DELTAS]
Definition: truemotion2.c:76
int uv_stride
Definition: truemotion2.c:86
int y_stride
Definition: truemotion2.c:86
AVFrame * pic
Definition: truemotion2.c:63
uint8_t * buffer
Definition: truemotion2.c:69
int tok_ptrs[TM2_NUM_STREAMS]
Definition: truemotion2.c:75
int * Y1
Definition: truemotion2.c:85
int * Y2
Definition: truemotion2.c:85
int D[4]
Definition: truemotion2.c:78
int * clast
Definition: truemotion2.c:81
int tok_lens[TM2_NUM_STREAMS]
Definition: truemotion2.c:74
structure for gathering Huffman codes information
Definition: truemotion2.c:103
int nodes
total number of nodes in tree
Definition: truemotion2.c:107
int * nums
literals
Definition: truemotion2.c:110
int val_bits
length of literal
Definition: truemotion2.c:104
uint8_t * lens
codelengths
Definition: truemotion2.c:111
int min_bits
minimum length of code
Definition: truemotion2.c:106
int num
current number filled
Definition: truemotion2.c:108
int max_bits
maximum length of code
Definition: truemotion2.c:105
int max_num
total number of codes
Definition: truemotion2.c:109
Definition: vlc.h:26
#define av_free(p)
#define av_malloc_array(a, b)
#define avpriv_request_sample(...)
#define av_freep(p)
#define av_log(a,...)
FILE * out
Definition: movenc.c:54
AVFormatContext * ctx
Definition: movenc.c:48
static int tm2_read_deltas(TM2Context *ctx, int stream_id)
Definition: truemotion2.c:257
static const int tm2_stream_order[TM2_NUM_STREAMS]
Definition: truemotion2.c:882
#define TM2_INIT_POINTERS_2()
Definition: truemotion2.c:434
AVCodec ff_truemotion2_decoder
Definition: truemotion2.c:1011
static int tm2_build_huff_table(TM2Context *ctx, TM2Codes *code)
Definition: truemotion2.c:148
static void tm2_med_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:525
#define TM2_INIT_POINTERS()
Definition: truemotion2.c:420
static int tm2_read_tree(TM2Context *ctx, int length, TM2Huff *huff)
Definition: truemotion2.c:118
#define TM2_OLD_HEADER_MAGIC
Definition: truemotion2.c:237
static int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
Definition: truemotion2.c:240
static int GET_TOK(TM2Context *ctx, int type)
Definition: truemotion2.c:400
static void tm2_low_chroma(int *data, int stride, int *clast, unsigned *CD, int *deltas, int bx)
Definition: truemotion2.c:485
static void tm2_still_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:635
#define TM2_NEW_HEADER_MAGIC
Definition: truemotion2.c:238
static void tm2_free_codes(TM2Codes *code)
Definition: truemotion2.c:221
TM2_STREAMS
Definition: truemotion2.c:39
@ TM2_C_LO
Definition: truemotion2.c:41
@ TM2_L_LO
Definition: truemotion2.c:43
@ TM2_TYPE
Definition: truemotion2.c:46
@ TM2_L_HI
Definition: truemotion2.c:42
@ TM2_MOT
Definition: truemotion2.c:45
@ TM2_NUM_STREAMS
Definition: truemotion2.c:47
@ TM2_UPD
Definition: truemotion2.c:44
@ TM2_C_HI
Definition: truemotion2.c:40
static av_cold int decode_init(AVCodecContext *avctx)
Definition: truemotion2.c:946
static void tm2_high_chroma(int *data, int stride, int *last, unsigned *CD, int *deltas)
Definition: truemotion2.c:472
static av_cold int decode_end(AVCodecContext *avctx)
Definition: truemotion2.c:992
static void tm2_motion_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:710
static int tm2_read_stream(TM2Context *ctx, const uint8_t *buf, int stream_id, int buf_size)
Definition: truemotion2.c:284
static void tm2_hi_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:504
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: truemotion2.c:888
static void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:670
static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
Definition: truemotion2.c:764
#define TM2_HEADER_SIZE
Definition: truemotion2.c:886
static int tm2_get_token(GetBitContext *gb, TM2Codes *code)
Definition: truemotion2.c:228
static void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:588
#define TM2_RECALC_BLOCK(CHR, stride, last, CD)
Definition: truemotion2.c:447
TM2_BLOCKS
Definition: truemotion2.c:51
@ TM2_LOW_RES
Definition: truemotion2.c:54
@ TM2_HI_RES
Definition: truemotion2.c:52
@ TM2_UPDATE
Definition: truemotion2.c:56
@ TM2_MOTION
Definition: truemotion2.c:58
@ TM2_STILL
Definition: truemotion2.c:57
@ TM2_NULL_RES
Definition: truemotion2.c:55
@ TM2_MED_RES
Definition: truemotion2.c:53
static void tm2_apply_deltas(TM2Context *ctx, int *Y, int stride, int *deltas, int *last)
Definition: truemotion2.c:454
static void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int by)
Definition: truemotion2.c:547
#define TM2_DELTAS
Definition: truemotion2.c:36
#define TM2_ESCAPE
Definition: truemotion2.c:35
#define mb
if(ret< 0)
Definition: vf_mcdeint.c:282
static av_always_inline int diff(const uint32_t a, const uint32_t b)
static const uint8_t offset[127][2]
Definition: vf_spp.c:107
int len