FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
vc1dec.c
Go to the documentation of this file.
1 /*
2  * VC-1 and WMV3 decoder
3  * Copyright (c) 2011 Mashiat Sarker Shakkhar
4  * Copyright (c) 2006-2007 Konstantin Shishkov
5  * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 /**
25  * @file
26  * VC-1 and WMV3 decoder
27  */
28 
29 #include "avcodec.h"
30 #include "blockdsp.h"
31 #include "get_bits.h"
32 #include "internal.h"
33 #include "mpeg_er.h"
34 #include "mpegvideo.h"
35 #include "msmpeg4.h"
36 #include "msmpeg4data.h"
37 #include "profiles.h"
38 #include "vc1.h"
39 #include "vc1data.h"
40 #include "vdpau_compat.h"
41 #include "libavutil/avassert.h"
42 
43 
44 #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER
45 
46 typedef struct SpriteData {
47  /**
48  * Transform coefficients for both sprites in 16.16 fixed point format,
49  * in the order they appear in the bitstream:
50  * x scale
51  * rotation 1 (unused)
52  * x offset
53  * rotation 2 (unused)
54  * y scale
55  * y offset
56  * alpha
57  */
58  int coefs[2][7];
59 
60  int effect_type, effect_flag;
61  int effect_pcount1, effect_pcount2; ///< amount of effect parameters stored in effect_params
62  int effect_params1[15], effect_params2[10]; ///< effect parameters in 16.16 fixed point format
63 } SpriteData;
64 
65 static inline int get_fp_val(GetBitContext* gb)
66 {
67  return (get_bits_long(gb, 30) - (1 << 29)) << 1;
68 }
69 
70 static void vc1_sprite_parse_transform(GetBitContext* gb, int c[7])
71 {
72  c[1] = c[3] = 0;
73 
74  switch (get_bits(gb, 2)) {
75  case 0:
76  c[0] = 1 << 16;
77  c[2] = get_fp_val(gb);
78  c[4] = 1 << 16;
79  break;
80  case 1:
81  c[0] = c[4] = get_fp_val(gb);
82  c[2] = get_fp_val(gb);
83  break;
84  case 2:
85  c[0] = get_fp_val(gb);
86  c[2] = get_fp_val(gb);
87  c[4] = get_fp_val(gb);
88  break;
89  case 3:
90  c[0] = get_fp_val(gb);
91  c[1] = get_fp_val(gb);
92  c[2] = get_fp_val(gb);
93  c[3] = get_fp_val(gb);
94  c[4] = get_fp_val(gb);
95  break;
96  }
97  c[5] = get_fp_val(gb);
98  if (get_bits1(gb))
99  c[6] = get_fp_val(gb);
100  else
101  c[6] = 1 << 16;
102 }
103 
104 static int vc1_parse_sprites(VC1Context *v, GetBitContext* gb, SpriteData* sd)
105 {
106  AVCodecContext *avctx = v->s.avctx;
107  int sprite, i;
108 
109  for (sprite = 0; sprite <= v->two_sprites; sprite++) {
110  vc1_sprite_parse_transform(gb, sd->coefs[sprite]);
111  if (sd->coefs[sprite][1] || sd->coefs[sprite][3])
112  avpriv_request_sample(avctx, "Non-zero rotation coefficients");
113  av_log(avctx, AV_LOG_DEBUG, sprite ? "S2:" : "S1:");
114  for (i = 0; i < 7; i++)
115  av_log(avctx, AV_LOG_DEBUG, " %d.%.3d",
116  sd->coefs[sprite][i] / (1<<16),
117  (abs(sd->coefs[sprite][i]) & 0xFFFF) * 1000 / (1 << 16));
118  av_log(avctx, AV_LOG_DEBUG, "\n");
119  }
120 
121  skip_bits(gb, 2);
122  if (sd->effect_type = get_bits_long(gb, 30)) {
123  switch (sd->effect_pcount1 = get_bits(gb, 4)) {
124  case 7:
125  vc1_sprite_parse_transform(gb, sd->effect_params1);
126  break;
127  case 14:
128  vc1_sprite_parse_transform(gb, sd->effect_params1);
129  vc1_sprite_parse_transform(gb, sd->effect_params1 + 7);
130  break;
131  default:
132  for (i = 0; i < sd->effect_pcount1; i++)
133  sd->effect_params1[i] = get_fp_val(gb);
134  }
135  if (sd->effect_type != 13 || sd->effect_params1[0] != sd->coefs[0][6]) {
136  // effect 13 is simple alpha blending and matches the opacity above
137  av_log(avctx, AV_LOG_DEBUG, "Effect: %d; params: ", sd->effect_type);
138  for (i = 0; i < sd->effect_pcount1; i++)
139  av_log(avctx, AV_LOG_DEBUG, " %d.%.2d",
140  sd->effect_params1[i] / (1 << 16),
141  (abs(sd->effect_params1[i]) & 0xFFFF) * 1000 / (1 << 16));
142  av_log(avctx, AV_LOG_DEBUG, "\n");
143  }
144 
145  sd->effect_pcount2 = get_bits(gb, 16);
146  if (sd->effect_pcount2 > 10) {
147  av_log(avctx, AV_LOG_ERROR, "Too many effect parameters\n");
148  return AVERROR_INVALIDDATA;
149  } else if (sd->effect_pcount2) {
150  i = -1;
151  av_log(avctx, AV_LOG_DEBUG, "Effect params 2: ");
152  while (++i < sd->effect_pcount2) {
153  sd->effect_params2[i] = get_fp_val(gb);
154  av_log(avctx, AV_LOG_DEBUG, " %d.%.2d",
155  sd->effect_params2[i] / (1 << 16),
156  (abs(sd->effect_params2[i]) & 0xFFFF) * 1000 / (1 << 16));
157  }
158  av_log(avctx, AV_LOG_DEBUG, "\n");
159  }
160  }
161  if (sd->effect_flag = get_bits1(gb))
162  av_log(avctx, AV_LOG_DEBUG, "Effect flag set\n");
163 
164  if (get_bits_count(gb) >= gb->size_in_bits +
165  (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE ? 64 : 0)) {
166  av_log(avctx, AV_LOG_ERROR, "Buffer overrun\n");
167  return AVERROR_INVALIDDATA;
168  }
169  if (get_bits_count(gb) < gb->size_in_bits - 8)
170  av_log(avctx, AV_LOG_WARNING, "Buffer not fully read\n");
171 
172  return 0;
173 }
174 
175 static void vc1_draw_sprites(VC1Context *v, SpriteData* sd)
176 {
177  int i, plane, row, sprite;
178  int sr_cache[2][2] = { { -1, -1 }, { -1, -1 } };
179  uint8_t* src_h[2][2];
180  int xoff[2], xadv[2], yoff[2], yadv[2], alpha;
181  int ysub[2];
182  MpegEncContext *s = &v->s;
183 
184  for (i = 0; i <= v->two_sprites; i++) {
185  xoff[i] = av_clip(sd->coefs[i][2], 0, v->sprite_width-1 << 16);
186  xadv[i] = sd->coefs[i][0];
187  if (xadv[i] != 1<<16 || (v->sprite_width << 16) - (v->output_width << 16) - xoff[i])
188  xadv[i] = av_clip(xadv[i], 0, ((v->sprite_width<<16) - xoff[i] - 1) / v->output_width);
189 
190  yoff[i] = av_clip(sd->coefs[i][5], 0, v->sprite_height-1 << 16);
191  yadv[i] = av_clip(sd->coefs[i][4], 0, ((v->sprite_height << 16) - yoff[i]) / v->output_height);
192  }
193  alpha = av_clip_uint16(sd->coefs[1][6]);
194 
195  for (plane = 0; plane < (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY ? 1 : 3); plane++) {
196  int width = v->output_width>>!!plane;
197 
198  for (row = 0; row < v->output_height>>!!plane; row++) {
199  uint8_t *dst = v->sprite_output_frame->data[plane] +
201 
202  for (sprite = 0; sprite <= v->two_sprites; sprite++) {
203  uint8_t *iplane = s->current_picture.f->data[plane];
204  int iline = s->current_picture.f->linesize[plane];
205  int ycoord = yoff[sprite] + yadv[sprite] * row;
206  int yline = ycoord >> 16;
207  int next_line;
208  ysub[sprite] = ycoord & 0xFFFF;
209  if (sprite) {
210  iplane = s->last_picture.f->data[plane];
211  iline = s->last_picture.f->linesize[plane];
212  }
213  next_line = FFMIN(yline + 1, (v->sprite_height >> !!plane) - 1) * iline;
214  if (!(xoff[sprite] & 0xFFFF) && xadv[sprite] == 1 << 16) {
215  src_h[sprite][0] = iplane + (xoff[sprite] >> 16) + yline * iline;
216  if (ysub[sprite])
217  src_h[sprite][1] = iplane + (xoff[sprite] >> 16) + next_line;
218  } else {
219  if (sr_cache[sprite][0] != yline) {
220  if (sr_cache[sprite][1] == yline) {
221  FFSWAP(uint8_t*, v->sr_rows[sprite][0], v->sr_rows[sprite][1]);
222  FFSWAP(int, sr_cache[sprite][0], sr_cache[sprite][1]);
223  } else {
224  v->vc1dsp.sprite_h(v->sr_rows[sprite][0], iplane + yline * iline, xoff[sprite], xadv[sprite], width);
225  sr_cache[sprite][0] = yline;
226  }
227  }
228  if (ysub[sprite] && sr_cache[sprite][1] != yline + 1) {
229  v->vc1dsp.sprite_h(v->sr_rows[sprite][1],
230  iplane + next_line, xoff[sprite],
231  xadv[sprite], width);
232  sr_cache[sprite][1] = yline + 1;
233  }
234  src_h[sprite][0] = v->sr_rows[sprite][0];
235  src_h[sprite][1] = v->sr_rows[sprite][1];
236  }
237  }
238 
239  if (!v->two_sprites) {
240  if (ysub[0]) {
241  v->vc1dsp.sprite_v_single(dst, src_h[0][0], src_h[0][1], ysub[0], width);
242  } else {
243  memcpy(dst, src_h[0][0], width);
244  }
245  } else {
246  if (ysub[0] && ysub[1]) {
247  v->vc1dsp.sprite_v_double_twoscale(dst, src_h[0][0], src_h[0][1], ysub[0],
248  src_h[1][0], src_h[1][1], ysub[1], alpha, width);
249  } else if (ysub[0]) {
250  v->vc1dsp.sprite_v_double_onescale(dst, src_h[0][0], src_h[0][1], ysub[0],
251  src_h[1][0], alpha, width);
252  } else if (ysub[1]) {
253  v->vc1dsp.sprite_v_double_onescale(dst, src_h[1][0], src_h[1][1], ysub[1],
254  src_h[0][0], (1<<16)-1-alpha, width);
255  } else {
256  v->vc1dsp.sprite_v_double_noscale(dst, src_h[0][0], src_h[1][0], alpha, width);
257  }
258  }
259  }
260 
261  if (!plane) {
262  for (i = 0; i <= v->two_sprites; i++) {
263  xoff[i] >>= 1;
264  yoff[i] >>= 1;
265  }
266  }
267 
268  }
269 }
270 
271 
272 static int vc1_decode_sprites(VC1Context *v, GetBitContext* gb)
273 {
274  int ret;
275  MpegEncContext *s = &v->s;
276  AVCodecContext *avctx = s->avctx;
277  SpriteData sd;
278 
279  memset(&sd, 0, sizeof(sd));
280 
281  ret = vc1_parse_sprites(v, gb, &sd);
282  if (ret < 0)
283  return ret;
284 
285  if (!s->current_picture.f || !s->current_picture.f->data[0]) {
286  av_log(avctx, AV_LOG_ERROR, "Got no sprites\n");
287  return AVERROR_UNKNOWN;
288  }
289 
290  if (v->two_sprites && (!s->last_picture_ptr || !s->last_picture.f->data[0])) {
291  av_log(avctx, AV_LOG_WARNING, "Need two sprites, only got one\n");
292  v->two_sprites = 0;
293  }
294 
296  if ((ret = ff_get_buffer(avctx, v->sprite_output_frame, 0)) < 0)
297  return ret;
298 
299  vc1_draw_sprites(v, &sd);
300 
301  return 0;
302 }
303 
304 static void vc1_sprite_flush(AVCodecContext *avctx)
305 {
306  VC1Context *v = avctx->priv_data;
307  MpegEncContext *s = &v->s;
308  AVFrame *f = s->current_picture.f;
309  int plane, i;
310 
311  /* Windows Media Image codecs have a convergence interval of two keyframes.
312  Since we can't enforce it, clear to black the missing sprite. This is
313  wrong but it looks better than doing nothing. */
314 
315  if (f && f->data[0])
316  for (plane = 0; plane < (CONFIG_GRAY && s->avctx->flags & AV_CODEC_FLAG_GRAY ? 1 : 3); plane++)
317  for (i = 0; i < v->sprite_height>>!!plane; i++)
318  memset(f->data[plane] + i * f->linesize[plane],
319  plane ? 128 : 0, f->linesize[plane]);
320 }
321 
322 #endif
323 
325 {
326  MpegEncContext *s = &v->s;
327  int i, ret = AVERROR(ENOMEM);
328  int mb_height = FFALIGN(s->mb_height, 2);
329 
330  /* Allocate mb bitplanes */
331  v->mv_type_mb_plane = av_malloc (s->mb_stride * mb_height);
332  v->direct_mb_plane = av_malloc (s->mb_stride * mb_height);
333  v->forward_mb_plane = av_malloc (s->mb_stride * mb_height);
334  v->fieldtx_plane = av_mallocz(s->mb_stride * mb_height);
335  v->acpred_plane = av_malloc (s->mb_stride * mb_height);
336  v->over_flags_plane = av_malloc (s->mb_stride * mb_height);
337  if (!v->mv_type_mb_plane || !v->direct_mb_plane || !v->forward_mb_plane ||
338  !v->fieldtx_plane || !v->acpred_plane || !v->over_flags_plane)
339  goto error;
340 
341  v->n_allocated_blks = s->mb_width + 2;
342  v->block = av_malloc(sizeof(*v->block) * v->n_allocated_blks);
343  v->cbp_base = av_malloc(sizeof(v->cbp_base[0]) * 2 * s->mb_stride);
344  if (!v->block || !v->cbp_base)
345  goto error;
346  v->cbp = v->cbp_base + s->mb_stride;
347  v->ttblk_base = av_malloc(sizeof(v->ttblk_base[0]) * 2 * s->mb_stride);
348  if (!v->ttblk_base)
349  goto error;
350  v->ttblk = v->ttblk_base + s->mb_stride;
351  v->is_intra_base = av_mallocz(sizeof(v->is_intra_base[0]) * 2 * s->mb_stride);
352  if (!v->is_intra_base)
353  goto error;
354  v->is_intra = v->is_intra_base + s->mb_stride;
355  v->luma_mv_base = av_mallocz(sizeof(v->luma_mv_base[0]) * 2 * s->mb_stride);
356  if (!v->luma_mv_base)
357  goto error;
358  v->luma_mv = v->luma_mv_base + s->mb_stride;
359 
360  /* allocate block type info in that way so it could be used with s->block_index[] */
361  v->mb_type_base = av_malloc(s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2);
362  if (!v->mb_type_base)
363  goto error;
364  v->mb_type[0] = v->mb_type_base + s->b8_stride + 1;
365  v->mb_type[1] = v->mb_type_base + s->b8_stride * (mb_height * 2 + 1) + s->mb_stride + 1;
366  v->mb_type[2] = v->mb_type[1] + s->mb_stride * (mb_height + 1);
367 
368  /* allocate memory to store block level MV info */
369  v->blk_mv_type_base = av_mallocz( s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2);
370  if (!v->blk_mv_type_base)
371  goto error;
372  v->blk_mv_type = v->blk_mv_type_base + s->b8_stride + 1;
373  v->mv_f_base = av_mallocz(2 * (s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2));
374  if (!v->mv_f_base)
375  goto error;
376  v->mv_f[0] = v->mv_f_base + s->b8_stride + 1;
377  v->mv_f[1] = v->mv_f[0] + (s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2);
378  v->mv_f_next_base = av_mallocz(2 * (s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2));
379  if (!v->mv_f_next_base)
380  goto error;
381  v->mv_f_next[0] = v->mv_f_next_base + s->b8_stride + 1;
382  v->mv_f_next[1] = v->mv_f_next[0] + (s->b8_stride * (mb_height * 2 + 1) + s->mb_stride * (mb_height + 1) * 2);
383 
385  for (i = 0; i < 4; i++)
386  if (!(v->sr_rows[i >> 1][i & 1] = av_malloc(v->output_width)))
387  return AVERROR(ENOMEM);
388  }
389 
390  ret = ff_intrax8_common_init(s->avctx, &v->x8, &s->idsp,
391  s->block, s->block_last_index,
392  s->mb_width, s->mb_height);
393  if (ret < 0)
394  goto error;
395 
396  return 0;
397 
398 error:
400  return ret;
401 }
402 
404 {
405  int i;
406  for (i = 0; i < 64; i++) {
407 #define transpose(x) (((x) >> 3) | (((x) & 7) << 3))
408  v->zz_8x8[0][i] = transpose(ff_wmv1_scantable[0][i]);
409  v->zz_8x8[1][i] = transpose(ff_wmv1_scantable[1][i]);
410  v->zz_8x8[2][i] = transpose(ff_wmv1_scantable[2][i]);
411  v->zz_8x8[3][i] = transpose(ff_wmv1_scantable[3][i]);
413  }
414  v->left_blk_sh = 0;
415  v->top_blk_sh = 3;
416 }
417 
418 /** Initialize a VC1/WMV3 decoder
419  * @todo TODO: Handle VC-1 IDUs (Transport level?)
420  * @todo TODO: Decipher remaining bits in extra_data
421  */
423 {
424  VC1Context *v = avctx->priv_data;
425  MpegEncContext *s = &v->s;
426  GetBitContext gb;
427  int ret;
428 
429  /* save the container output size for WMImage */
430  v->output_width = avctx->width;
431  v->output_height = avctx->height;
432 
433  if (!avctx->extradata_size || !avctx->extradata)
434  return -1;
435  v->s.avctx = avctx;
436 
437  if ((ret = ff_vc1_init_common(v)) < 0)
438  return ret;
439 
440  if (avctx->codec_id == AV_CODEC_ID_WMV3 || avctx->codec_id == AV_CODEC_ID_WMV3IMAGE) {
441  int count = 0;
442 
443  // looks like WMV3 has a sequence header stored in the extradata
444  // advanced sequence header may be before the first frame
445  // the last byte of the extradata is a version number, 1 for the
446  // samples we can decode
447 
448  init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);
449 
450  if ((ret = ff_vc1_decode_sequence_header(avctx, v, &gb)) < 0)
451  return ret;
452 
453  count = avctx->extradata_size*8 - get_bits_count(&gb);
454  if (count > 0) {
455  av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",
456  count, get_bits_long(&gb, FFMIN(count, 32)));
457  } else if (count < 0) {
458  av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);
459  }
460  } else { // VC1/WVC1/WVP2
461  const uint8_t *start = avctx->extradata;
462  uint8_t *end = avctx->extradata + avctx->extradata_size;
463  const uint8_t *next;
464  int size, buf2_size;
465  uint8_t *buf2 = NULL;
466  int seq_initialized = 0, ep_initialized = 0;
467 
468  if (avctx->extradata_size < 16) {
469  av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);
470  return -1;
471  }
472 
474  if (!buf2)
475  return AVERROR(ENOMEM);
476 
477  start = find_next_marker(start, end); // in WVC1 extradata first byte is its size, but can be 0 in mkv
478  next = start;
479  for (; next < end; start = next) {
480  next = find_next_marker(start + 4, end);
481  size = next - start - 4;
482  if (size <= 0)
483  continue;
484  buf2_size = vc1_unescape_buffer(start + 4, size, buf2);
485  init_get_bits(&gb, buf2, buf2_size * 8);
486  switch (AV_RB32(start)) {
487  case VC1_CODE_SEQHDR:
488  if ((ret = ff_vc1_decode_sequence_header(avctx, v, &gb)) < 0) {
489  av_free(buf2);
490  return ret;
491  }
492  seq_initialized = 1;
493  break;
494  case VC1_CODE_ENTRYPOINT:
495  if ((ret = ff_vc1_decode_entry_point(avctx, v, &gb)) < 0) {
496  av_free(buf2);
497  return ret;
498  }
499  ep_initialized = 1;
500  break;
501  }
502  }
503  av_free(buf2);
504  if (!seq_initialized || !ep_initialized) {
505  av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");
506  return -1;
507  }
508  v->res_sprite = (avctx->codec_id == AV_CODEC_ID_VC1IMAGE);
509  }
510 
511  avctx->profile = v->profile;
512  if (v->profile == PROFILE_ADVANCED)
513  avctx->level = v->level;
514 
515  if (!CONFIG_GRAY || !(avctx->flags & AV_CODEC_FLAG_GRAY))
516  avctx->pix_fmt = ff_get_format(avctx, avctx->codec->pix_fmts);
517  else {
518  avctx->pix_fmt = AV_PIX_FMT_GRAY8;
519  if (avctx->color_range == AVCOL_RANGE_UNSPECIFIED)
520  avctx->color_range = AVCOL_RANGE_MPEG;
521  }
522 
523  // ensure static VLC tables are initialized
524  if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
525  return ret;
526  if ((ret = ff_vc1_decode_init_alloc_tables(v)) < 0)
527  return ret;
528  // Hack to ensure the above functions will be called
529  // again once we know all necessary settings.
530  // That this is necessary might indicate a bug.
531  ff_vc1_decode_end(avctx);
532 
533  ff_blockdsp_init(&s->bdsp, avctx);
535  ff_qpeldsp_init(&s->qdsp);
536 
537  // Must happen after calling ff_vc1_decode_end
538  // to avoid de-allocating the sprite_output_frame
540  if (!v->sprite_output_frame)
541  return AVERROR(ENOMEM);
542 
543  avctx->has_b_frames = !!avctx->max_b_frames;
544 
545  if (v->color_prim == 1 || v->color_prim == 5 || v->color_prim == 6)
546  avctx->color_primaries = v->color_prim;
547  if (v->transfer_char == 1 || v->transfer_char == 7)
548  avctx->color_trc = v->transfer_char;
549  if (v->matrix_coef == 1 || v->matrix_coef == 6 || v->matrix_coef == 7)
550  avctx->colorspace = v->matrix_coef;
551 
552  s->mb_width = (avctx->coded_width + 15) >> 4;
553  s->mb_height = (avctx->coded_height + 15) >> 4;
554 
555  if (v->profile == PROFILE_ADVANCED || v->res_fasttx) {
557  } else {
558  memcpy(v->zz_8x8, ff_wmv1_scantable, 4*64);
559  v->left_blk_sh = 3;
560  v->top_blk_sh = 0;
561  }
562 
563  if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
564  v->sprite_width = avctx->coded_width;
565  v->sprite_height = avctx->coded_height;
566 
567  avctx->coded_width = avctx->width = v->output_width;
568  avctx->coded_height = avctx->height = v->output_height;
569 
570  // prevent 16.16 overflows
571  if (v->sprite_width > 1 << 14 ||
572  v->sprite_height > 1 << 14 ||
573  v->output_width > 1 << 14 ||
574  v->output_height > 1 << 14) return -1;
575 
576  if ((v->sprite_width&1) || (v->sprite_height&1)) {
577  avpriv_request_sample(avctx, "odd sprites support");
578  return AVERROR_PATCHWELCOME;
579  }
580  }
581  return 0;
582 }
583 
584 /** Close a VC1/WMV3 decoder
585  * @warning Initial try at using MpegEncContext stuff
586  */
588 {
589  VC1Context *v = avctx->priv_data;
590  int i;
591 
593 
594  for (i = 0; i < 4; i++)
595  av_freep(&v->sr_rows[i >> 1][i & 1]);
596  av_freep(&v->hrd_rate);
597  av_freep(&v->hrd_buffer);
598  ff_mpv_common_end(&v->s);
602  av_freep(&v->fieldtx_plane);
603  av_freep(&v->acpred_plane);
605  av_freep(&v->mb_type_base);
607  av_freep(&v->mv_f_base);
609  av_freep(&v->block);
610  av_freep(&v->cbp_base);
611  av_freep(&v->ttblk_base);
612  av_freep(&v->is_intra_base); // FIXME use v->mb_type[]
613  av_freep(&v->luma_mv_base);
615  return 0;
616 }
617 
618 
619 /** Decode a VC1/WMV3 frame
620  * @todo TODO: Handle VC-1 IDUs (Transport level?)
621  */
622 static int vc1_decode_frame(AVCodecContext *avctx, void *data,
623  int *got_frame, AVPacket *avpkt)
624 {
625  const uint8_t *buf = avpkt->data;
626  int buf_size = avpkt->size, n_slices = 0, i, ret;
627  VC1Context *v = avctx->priv_data;
628  MpegEncContext *s = &v->s;
629  AVFrame *pict = data;
630  uint8_t *buf2 = NULL;
631  const uint8_t *buf_start = buf, *buf_start_second_field = NULL;
632  int mb_height, n_slices1=-1;
633  struct {
634  uint8_t *buf;
635  GetBitContext gb;
636  int mby_start;
637  } *slices = NULL, *tmp;
638 
639  v->second_field = 0;
640 
642  s->low_delay = 1;
643 
644  /* no supplementary picture */
645  if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == VC1_CODE_ENDOFSEQ)) {
646  /* special case for last picture */
647  if (s->low_delay == 0 && s->next_picture_ptr) {
648  if ((ret = av_frame_ref(pict, s->next_picture_ptr->f)) < 0)
649  return ret;
650  s->next_picture_ptr = NULL;
651 
652  *got_frame = 1;
653  }
654 
655  return buf_size;
656  }
657 
658 #if FF_API_CAP_VDPAU
660  if (v->profile < PROFILE_ADVANCED)
662  else
663  avctx->pix_fmt = AV_PIX_FMT_VDPAU_VC1;
664  }
665 #endif
666 
667  //for advanced profile we may need to parse and unescape data
668  if (avctx->codec_id == AV_CODEC_ID_VC1 || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
669  int buf_size2 = 0;
670  buf2 = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
671  if (!buf2)
672  return AVERROR(ENOMEM);
673 
674  if (IS_MARKER(AV_RB32(buf))) { /* frame starts with marker and needs to be parsed */
675  const uint8_t *start, *end, *next;
676  int size;
677 
678  next = buf;
679  for (start = buf, end = buf + buf_size; next < end; start = next) {
680  next = find_next_marker(start + 4, end);
681  size = next - start - 4;
682  if (size <= 0) continue;
683  switch (AV_RB32(start)) {
684  case VC1_CODE_FRAME:
685  if (avctx->hwaccel
688 #endif
689  )
690  buf_start = start;
691  buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);
692  break;
693  case VC1_CODE_FIELD: {
694  int buf_size3;
695  if (avctx->hwaccel
698 #endif
699  )
700  buf_start_second_field = start;
701  tmp = av_realloc_array(slices, sizeof(*slices), (n_slices+1));
702  if (!tmp) {
703  ret = AVERROR(ENOMEM);
704  goto err;
705  }
706  slices = tmp;
707  slices[n_slices].buf = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
708  if (!slices[n_slices].buf) {
709  ret = AVERROR(ENOMEM);
710  goto err;
711  }
712  buf_size3 = vc1_unescape_buffer(start + 4, size,
713  slices[n_slices].buf);
714  init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,
715  buf_size3 << 3);
716  /* assuming that the field marker is at the exact middle,
717  hope it's correct */
718  slices[n_slices].mby_start = s->mb_height + 1 >> 1;
719  n_slices1 = n_slices - 1; // index of the last slice of the first field
720  n_slices++;
721  break;
722  }
723  case VC1_CODE_ENTRYPOINT: /* it should be before frame data */
724  buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);
725  init_get_bits(&s->gb, buf2, buf_size2 * 8);
726  ff_vc1_decode_entry_point(avctx, v, &s->gb);
727  break;
728  case VC1_CODE_SLICE: {
729  int buf_size3;
730  tmp = av_realloc_array(slices, sizeof(*slices), (n_slices+1));
731  if (!tmp) {
732  ret = AVERROR(ENOMEM);
733  goto err;
734  }
735  slices = tmp;
736  slices[n_slices].buf = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
737  if (!slices[n_slices].buf) {
738  ret = AVERROR(ENOMEM);
739  goto err;
740  }
741  buf_size3 = vc1_unescape_buffer(start + 4, size,
742  slices[n_slices].buf);
743  init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,
744  buf_size3 << 3);
745  slices[n_slices].mby_start = get_bits(&slices[n_slices].gb, 9);
746  n_slices++;
747  break;
748  }
749  }
750  }
751  } else if (v->interlace && ((buf[0] & 0xC0) == 0xC0)) { /* WVC1 interlaced stores both fields divided by marker */
752  const uint8_t *divider;
753  int buf_size3;
754 
755  divider = find_next_marker(buf, buf + buf_size);
756  if ((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD) {
757  av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");
758  ret = AVERROR_INVALIDDATA;
759  goto err;
760  } else { // found field marker, unescape second field
761  if (avctx->hwaccel
764 #endif
765  )
766  buf_start_second_field = divider;
767  tmp = av_realloc_array(slices, sizeof(*slices), (n_slices+1));
768  if (!tmp) {
769  ret = AVERROR(ENOMEM);
770  goto err;
771  }
772  slices = tmp;
773  slices[n_slices].buf = av_mallocz(buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
774  if (!slices[n_slices].buf) {
775  ret = AVERROR(ENOMEM);
776  goto err;
777  }
778  buf_size3 = vc1_unescape_buffer(divider + 4, buf + buf_size - divider - 4, slices[n_slices].buf);
779  init_get_bits(&slices[n_slices].gb, slices[n_slices].buf,
780  buf_size3 << 3);
781  slices[n_slices].mby_start = s->mb_height + 1 >> 1;
782  n_slices1 = n_slices - 1;
783  n_slices++;
784  }
785  buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);
786  } else {
787  buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);
788  }
789  init_get_bits(&s->gb, buf2, buf_size2*8);
790  } else
791  init_get_bits(&s->gb, buf, buf_size*8);
792 
793  if (v->res_sprite) {
794  v->new_sprite = !get_bits1(&s->gb);
795  v->two_sprites = get_bits1(&s->gb);
796  /* res_sprite means a Windows Media Image stream, AV_CODEC_ID_*IMAGE means
797  we're using the sprite compositor. These are intentionally kept separate
798  so you can get the raw sprites by using the wmv3 decoder for WMVP or
799  the vc1 one for WVP2 */
800  if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
801  if (v->new_sprite) {
802  // switch AVCodecContext parameters to those of the sprites
803  avctx->width = avctx->coded_width = v->sprite_width;
804  avctx->height = avctx->coded_height = v->sprite_height;
805  } else {
806  goto image;
807  }
808  }
809  }
810 
811  if (s->context_initialized &&
812  (s->width != avctx->coded_width ||
813  s->height != avctx->coded_height)) {
814  ff_vc1_decode_end(avctx);
815  }
816 
817  if (!s->context_initialized) {
818  if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
819  goto err;
820  if ((ret = ff_vc1_decode_init_alloc_tables(v)) < 0) {
822  goto err;
823  }
824 
825  s->low_delay = !avctx->has_b_frames || v->res_sprite;
826 
827  if (v->profile == PROFILE_ADVANCED) {
828  if(avctx->coded_width<=1 || avctx->coded_height<=1) {
829  ret = AVERROR_INVALIDDATA;
830  goto err;
831  }
832  s->h_edge_pos = avctx->coded_width;
833  s->v_edge_pos = avctx->coded_height;
834  }
835  }
836 
837  // do parse frame header
838  v->pic_header_flag = 0;
839  v->first_pic_header_flag = 1;
840  if (v->profile < PROFILE_ADVANCED) {
841  if ((ret = ff_vc1_parse_frame_header(v, &s->gb)) < 0) {
842  goto err;
843  }
844  } else {
845  if ((ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
846  goto err;
847  }
848  }
849  v->first_pic_header_flag = 0;
850 
851  if (avctx->debug & FF_DEBUG_PICT_INFO)
852  av_log(v->s.avctx, AV_LOG_DEBUG, "pict_type: %c\n", av_get_picture_type_char(s->pict_type));
853 
854  if ((avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE)
855  && s->pict_type != AV_PICTURE_TYPE_I) {
856  av_log(v->s.avctx, AV_LOG_ERROR, "Sprite decoder: expected I-frame\n");
857  ret = AVERROR_INVALIDDATA;
858  goto err;
859  }
860 
861  if ((s->mb_height >> v->field_mode) == 0) {
862  av_log(v->s.avctx, AV_LOG_ERROR, "image too short\n");
863  ret = AVERROR_INVALIDDATA;
864  goto err;
865  }
866 
867  // for skipping the frame
870 
871  /* skip B-frames if we don't have reference frames */
872  if (!s->last_picture_ptr && (s->pict_type == AV_PICTURE_TYPE_B || s->droppable)) {
873  av_log(v->s.avctx, AV_LOG_DEBUG, "Skipping B frame without reference frames\n");
874  goto end;
875  }
876  if ((avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type == AV_PICTURE_TYPE_B) ||
878  avctx->skip_frame >= AVDISCARD_ALL) {
879  goto end;
880  }
881 
882  if (s->next_p_frame_damaged) {
883  if (s->pict_type == AV_PICTURE_TYPE_B)
884  goto end;
885  else
886  s->next_p_frame_damaged = 0;
887  }
888 
889  if ((ret = ff_mpv_frame_start(s, avctx)) < 0) {
890  goto err;
891  }
892 
896 
897  // process pulldown flags
899  // Pulldown flags are only valid when 'broadcast' has been set.
900  // So ticks_per_frame will be 2
901  if (v->rff) {
902  // repeat field
904  } else if (v->rptfrm) {
905  // repeat frames
906  s->current_picture_ptr->f->repeat_pict = v->rptfrm * 2;
907  }
908 
911 
912 #if FF_API_CAP_VDPAU
913  if ((CONFIG_VC1_VDPAU_DECODER)
915  if (v->field_mode && buf_start_second_field) {
916  ff_vdpau_vc1_decode_picture(s, buf_start, buf_start_second_field - buf_start);
917  ff_vdpau_vc1_decode_picture(s, buf_start_second_field, (buf + buf_size) - buf_start_second_field);
918  } else {
919  ff_vdpau_vc1_decode_picture(s, buf_start, (buf + buf_size) - buf_start);
920  }
921  } else
922 #endif
923  if (avctx->hwaccel) {
924  if (v->field_mode && buf_start_second_field) {
925  // decode first field
927  if ((ret = avctx->hwaccel->start_frame(avctx, buf_start, buf_start_second_field - buf_start)) < 0)
928  goto err;
929  if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start, buf_start_second_field - buf_start)) < 0)
930  goto err;
931  if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
932  goto err;
933 
934  // decode second field
935  s->gb = slices[n_slices1 + 1].gb;
937  v->second_field = 1;
938  v->pic_header_flag = 0;
939  if (ff_vc1_parse_frame_header_adv(v, &s->gb) < 0) {
940  av_log(avctx, AV_LOG_ERROR, "parsing header for second field failed");
941  ret = AVERROR_INVALIDDATA;
942  goto err;
943  }
945 
946  if ((ret = avctx->hwaccel->start_frame(avctx, buf_start_second_field, (buf + buf_size) - buf_start_second_field)) < 0)
947  goto err;
948  if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start_second_field, (buf + buf_size) - buf_start_second_field)) < 0)
949  goto err;
950  if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
951  goto err;
952  } else {
954  if ((ret = avctx->hwaccel->start_frame(avctx, buf_start, (buf + buf_size) - buf_start)) < 0)
955  goto err;
956  if ((ret = avctx->hwaccel->decode_slice(avctx, buf_start, (buf + buf_size) - buf_start)) < 0)
957  goto err;
958  if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
959  goto err;
960  }
961  } else {
962  int header_ret = 0;
963 
965 
966  v->bits = buf_size * 8;
967  v->end_mb_x = s->mb_width;
968  if (v->field_mode) {
969  s->current_picture.f->linesize[0] <<= 1;
970  s->current_picture.f->linesize[1] <<= 1;
971  s->current_picture.f->linesize[2] <<= 1;
972  s->linesize <<= 1;
973  s->uvlinesize <<= 1;
974  }
975  mb_height = s->mb_height >> v->field_mode;
976 
977  av_assert0 (mb_height > 0);
978 
979  for (i = 0; i <= n_slices; i++) {
980  if (i > 0 && slices[i - 1].mby_start >= mb_height) {
981  if (v->field_mode <= 0) {
982  av_log(v->s.avctx, AV_LOG_ERROR, "Slice %d starts beyond "
983  "picture boundary (%d >= %d)\n", i,
984  slices[i - 1].mby_start, mb_height);
985  continue;
986  }
987  v->second_field = 1;
988  av_assert0((s->mb_height & 1) == 0);
989  v->blocks_off = s->b8_stride * (s->mb_height&~1);
990  v->mb_off = s->mb_stride * s->mb_height >> 1;
991  } else {
992  v->second_field = 0;
993  v->blocks_off = 0;
994  v->mb_off = 0;
995  }
996  if (i) {
997  v->pic_header_flag = 0;
998  if (v->field_mode && i == n_slices1 + 2) {
999  if ((header_ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
1000  av_log(v->s.avctx, AV_LOG_ERROR, "Field header damaged\n");
1001  ret = AVERROR_INVALIDDATA;
1002  if (avctx->err_recognition & AV_EF_EXPLODE)
1003  goto err;
1004  continue;
1005  }
1006  } else if (get_bits1(&s->gb)) {
1007  v->pic_header_flag = 1;
1008  if ((header_ret = ff_vc1_parse_frame_header_adv(v, &s->gb)) < 0) {
1009  av_log(v->s.avctx, AV_LOG_ERROR, "Slice header damaged\n");
1010  ret = AVERROR_INVALIDDATA;
1011  if (avctx->err_recognition & AV_EF_EXPLODE)
1012  goto err;
1013  continue;
1014  }
1015  }
1016  }
1017  if (header_ret < 0)
1018  continue;
1019  s->start_mb_y = (i == 0) ? 0 : FFMAX(0, slices[i-1].mby_start % mb_height);
1020  if (!v->field_mode || v->second_field)
1021  s->end_mb_y = (i == n_slices ) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);
1022  else {
1023  if (i >= n_slices) {
1024  av_log(v->s.avctx, AV_LOG_ERROR, "first field slice count too large\n");
1025  continue;
1026  }
1027  s->end_mb_y = (i <= n_slices1 + 1) ? mb_height : FFMIN(mb_height, slices[i].mby_start % mb_height);
1028  }
1029  if (s->end_mb_y <= s->start_mb_y) {
1030  av_log(v->s.avctx, AV_LOG_ERROR, "end mb y %d %d invalid\n", s->end_mb_y, s->start_mb_y);
1031  continue;
1032  }
1033  if (!v->p_frame_skipped && s->pict_type != AV_PICTURE_TYPE_I && !v->cbpcy_vlc) {
1034  av_log(v->s.avctx, AV_LOG_ERROR, "missing cbpcy_vlc\n");
1035  continue;
1036  }
1038  if (i != n_slices)
1039  s->gb = slices[i].gb;
1040  }
1041  if (v->field_mode) {
1042  v->second_field = 0;
1043  s->current_picture.f->linesize[0] >>= 1;
1044  s->current_picture.f->linesize[1] >>= 1;
1045  s->current_picture.f->linesize[2] >>= 1;
1046  s->linesize >>= 1;
1047  s->uvlinesize >>= 1;
1049  FFSWAP(uint8_t *, v->mv_f_next[0], v->mv_f[0]);
1050  FFSWAP(uint8_t *, v->mv_f_next[1], v->mv_f[1]);
1051  }
1052  }
1053  ff_dlog(s->avctx, "Consumed %i/%i bits\n",
1054  get_bits_count(&s->gb), s->gb.size_in_bits);
1055 // if (get_bits_count(&s->gb) > buf_size * 8)
1056 // return -1;
1057  if(s->er.error_occurred && s->pict_type == AV_PICTURE_TYPE_B) {
1058  ret = AVERROR_INVALIDDATA;
1059  goto err;
1060  }
1061  if (!v->field_mode)
1062  ff_er_frame_end(&s->er);
1063  }
1064 
1065  ff_mpv_frame_end(s);
1066 
1067  if (avctx->codec_id == AV_CODEC_ID_WMV3IMAGE || avctx->codec_id == AV_CODEC_ID_VC1IMAGE) {
1068 image:
1069  avctx->width = avctx->coded_width = v->output_width;
1070  avctx->height = avctx->coded_height = v->output_height;
1071  if (avctx->skip_frame >= AVDISCARD_NONREF)
1072  goto end;
1073 #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER
1074  if ((ret = vc1_decode_sprites(v, &s->gb)) < 0)
1075  goto err;
1076 #endif
1077  if ((ret = av_frame_ref(pict, v->sprite_output_frame)) < 0)
1078  goto err;
1079  *got_frame = 1;
1080  } else {
1081  if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
1082  if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
1083  goto err;
1085  *got_frame = 1;
1086  } else if (s->last_picture_ptr) {
1087  if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
1088  goto err;
1090  *got_frame = 1;
1091  }
1092  }
1093 
1094 end:
1095  av_free(buf2);
1096  for (i = 0; i < n_slices; i++)
1097  av_free(slices[i].buf);
1098  av_free(slices);
1099  return buf_size;
1100 
1101 err:
1102  av_free(buf2);
1103  for (i = 0; i < n_slices; i++)
1104  av_free(slices[i].buf);
1105  av_free(slices);
1106  return ret;
1107 }
1108 
1109 
1111 #if CONFIG_VC1_DXVA2_HWACCEL
1113 #endif
1114 #if CONFIG_VC1_D3D11VA_HWACCEL
1116 #endif
1117 #if CONFIG_VC1_VAAPI_HWACCEL
1119 #endif
1120 #if CONFIG_VC1_VDPAU_HWACCEL
1122 #endif
1125 };
1126 
1128  .name = "vc1",
1129  .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1"),
1130  .type = AVMEDIA_TYPE_VIDEO,
1131  .id = AV_CODEC_ID_VC1,
1132  .priv_data_size = sizeof(VC1Context),
1133  .init = vc1_decode_init,
1134  .close = ff_vc1_decode_end,
1136  .flush = ff_mpeg_flush,
1137  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
1138  .pix_fmts = vc1_hwaccel_pixfmt_list_420,
1140 };
1141 
1142 #if CONFIG_WMV3_DECODER
1143 AVCodec ff_wmv3_decoder = {
1144  .name = "wmv3",
1145  .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9"),
1146  .type = AVMEDIA_TYPE_VIDEO,
1147  .id = AV_CODEC_ID_WMV3,
1148  .priv_data_size = sizeof(VC1Context),
1149  .init = vc1_decode_init,
1150  .close = ff_vc1_decode_end,
1152  .flush = ff_mpeg_flush,
1153  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
1154  .pix_fmts = vc1_hwaccel_pixfmt_list_420,
1156 };
1157 #endif
1158 
1159 #if CONFIG_WMV3_VDPAU_DECODER && FF_API_VDPAU
1160 AVCodec ff_wmv3_vdpau_decoder = {
1161  .name = "wmv3_vdpau",
1162  .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 VDPAU"),
1163  .type = AVMEDIA_TYPE_VIDEO,
1164  .id = AV_CODEC_ID_WMV3,
1165  .priv_data_size = sizeof(VC1Context),
1166  .init = vc1_decode_init,
1167  .close = ff_vc1_decode_end,
1172 };
1173 #endif
1174 
1175 #if CONFIG_VC1_VDPAU_DECODER && FF_API_VDPAU
1176 AVCodec ff_vc1_vdpau_decoder = {
1177  .name = "vc1_vdpau",
1178  .long_name = NULL_IF_CONFIG_SMALL("SMPTE VC-1 VDPAU"),
1179  .type = AVMEDIA_TYPE_VIDEO,
1180  .id = AV_CODEC_ID_VC1,
1181  .priv_data_size = sizeof(VC1Context),
1182  .init = vc1_decode_init,
1183  .close = ff_vc1_decode_end,
1188 };
1189 #endif
1190 
1191 #if CONFIG_WMV3IMAGE_DECODER
1192 AVCodec ff_wmv3image_decoder = {
1193  .name = "wmv3image",
1194  .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 Image"),
1195  .type = AVMEDIA_TYPE_VIDEO,
1196  .id = AV_CODEC_ID_WMV3IMAGE,
1197  .priv_data_size = sizeof(VC1Context),
1198  .init = vc1_decode_init,
1199  .close = ff_vc1_decode_end,
1201  .capabilities = AV_CODEC_CAP_DR1,
1202  .flush = vc1_sprite_flush,
1203  .pix_fmts = (const enum AVPixelFormat[]) {
1206  },
1207 };
1208 #endif
1209 
1210 #if CONFIG_VC1IMAGE_DECODER
1211 AVCodec ff_vc1image_decoder = {
1212  .name = "vc1image",
1213  .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 9 Image v2"),
1214  .type = AVMEDIA_TYPE_VIDEO,
1215  .id = AV_CODEC_ID_VC1IMAGE,
1216  .priv_data_size = sizeof(VC1Context),
1217  .init = vc1_decode_init,
1218  .close = ff_vc1_decode_end,
1220  .capabilities = AV_CODEC_CAP_DR1,
1221  .flush = vc1_sprite_flush,
1222  .pix_fmts = (const enum AVPixelFormat[]) {
1225  },
1226 };
1227 #endif
int color_prim
8 bits, chroma coordinates of the color primaries
Definition: vc1.h:206
in the bitstream is reported as 00b
Definition: vc1.h:149
int plane
Definition: avisynth_c.h:291
IDCTDSPContext idsp
Definition: mpegvideo.h:227
#define NULL
Definition: coverity.c:32
const struct AVCodec * codec
Definition: avcodec.h:1658
discard all frames except keyframes
Definition: avcodec.h:783
int(* start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Called at the beginning of each frame or field picture.
Definition: avcodec.h:3725
BI type.
Definition: avutil.h:272
qpel_mc_func avg_qpel_pixels_tab[2][16]
Definition: qpeldsp.h:74
int p_frame_skipped
Definition: vc1.h:380
const char * s
Definition: avisynth_c.h:631
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
The VC1 Context.
Definition: vc1.h:173
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
int start_mb_y
start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) ...
Definition: mpegvideo.h:150
static void flush(AVCodecContext *avctx)
uint8_t * mv_f_base
Definition: vc1.h:350
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1851
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:247
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int ff_msmpeg4_decode_init(AVCodecContext *avctx)
Definition: msmpeg4dec.c:287
int end_mb_y
end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) ...
Definition: mpegvideo.h:151
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int max_b_frames
maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 re...
Definition: avcodec.h:1935
av_cold int ff_vc1_decode_end(AVCodecContext *avctx)
Close a VC1/WMV3 decoder.
Definition: vc1dec.c:587
int v_edge_pos
horizontal / vertical position of the right/bottom edge (pixel replication)
Definition: mpegvideo.h:129
void ff_er_frame_end(ERContext *s)
void(* sprite_v_double_onescale)(uint8_t *dst, const uint8_t *src1a, const uint8_t *src1b, int offset1, const uint8_t *src2a, int alpha, int width)
Definition: vc1dsp.h:70
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:2385
int repeat_pict
When decoding, this signals how much the picture must be delayed.
Definition: frame.h:313
int size
Definition: avcodec.h:1581
int transfer_char
8 bits, Opto-electronic transfer characteristics
Definition: vc1.h:207
int field_picture
whether or not the picture was encoded in separate fields
Definition: mpegpicture.h:79
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1877
static enum AVPixelFormat vc1_hwaccel_pixfmt_list_420[]
Definition: vc1dec.c:1110
uint8_t zz_8x8[4][64]
Zigzag table for TT_8x8, permuted for IDCT.
Definition: vc1.h:239
av_cold void ff_h264chroma_init(H264ChromaContext *c, int bit_depth)
Definition: h264chroma.c:41
mpegvideo header.
IntraX8Context x8
Definition: vc1.h:175
uint8_t * mb_type_base
Definition: vc1.h:264
discard all
Definition: avcodec.h:784
uint8_t * mv_f[2]
0: MV obtained from same field, 1: opposite field
Definition: vc1.h:350
int sprite_height
Definition: vc1.h:376
int end_mb_x
Horizontal macroblock limit (used only by mss2)
Definition: vc1.h:393
int profile
profile
Definition: avcodec.h:3153
QpelDSPContext qdsp
Definition: mpegvideo.h:232
AVCodec.
Definition: avcodec.h:3542
av_cold int ff_intrax8_common_init(AVCodecContext *avctx, IntraX8Context *w, IDCTDSPContext *idsp, int16_t(*block)[64], int block_last_index[12], int mb_width, int mb_height)
Initialize IntraX8 frame decoder.
Definition: intrax8.c:728
uint8_t rff
Definition: vc1.h:311
enum AVDiscard skip_frame
Skip decoding for selected frames.
Definition: avcodec.h:3264
int bits
Definition: vc1.h:179
struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:2968
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:981
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
uint8_t * acpred_plane
AC prediction flags bitplane.
Definition: vc1.h:321
VC-1 tables.
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
int matrix_coef
8 bits, Color primaries->YCbCr transform matrix
Definition: vc1.h:208
uint8_t
#define av_cold
Definition: attributes.h:82
#define av_malloc(s)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:140
int first_pic_header_flag
Definition: vc1.h:368
uint16_t * hrd_rate
Definition: vc1.h:326
av_cold int ff_vc1_init_common(VC1Context *v)
Init VC-1 specific tables and VC1Context members.
Definition: vc1.c:1575
void(* sprite_v_double_twoscale)(uint8_t *dst, const uint8_t *src1a, const uint8_t *src1b, int offset1, const uint8_t *src2a, const uint8_t *src2b, int offset2, int alpha, int width)
Definition: vc1dsp.h:72
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:2889
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int interlace
Progressive/interlaced (RPTFTM syntax element)
Definition: vc1.h:201
int second_field
Definition: vc1.h:354
int n_allocated_blks
Definition: vc1.h:385
qpel_mc_func(* qpel_put)[16]
Definition: motion_est.h:91
#define AV_CODEC_FLAG_LOW_DELAY
Force low delay.
Definition: avcodec.h:875
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
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1764
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:177
int16_t((* luma_mv)[2]
Definition: vc1.h:388
#define FF_API_CAP_VDPAU
Definition: version.h:73
int profile
Sequence header data for all Profiles TODO: choose between ints, uint8_ts and monobit flags...
Definition: vc1.h:218
#define PICT_BOTTOM_FIELD
Definition: mpegutils.h:38
MSMPEG4 data tables.
uint8_t * data
Definition: avcodec.h:1580
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:199
char av_get_picture_type_char(enum AVPictureType pict_type)
Return a single letter to describe the given picture type pict_type.
Definition: utils.c:91
#define AV_CODEC_CAP_HWACCEL_VDPAU
Codec can export data for HW decoding (VDPAU).
Definition: avcodec.h:992
#define ff_dlog(a,...)
bitstream reader API header.
uint8_t * forward_mb_plane
bitplane for "forward" MBs
Definition: vc1.h:288
WMV3 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstrea...
Definition: pixfmt.h:107
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:318
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:126
ptrdiff_t size
Definition: opengl_enc.c:101
static av_cold int vc1_decode_init(AVCodecContext *avctx)
Initialize a VC1/WMV3 decoder.
Definition: vc1dec.c:422
int ff_vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)
Decode Simple/Main Profiles sequence header.
Definition: vc1.c:276
uint8_t * over_flags_plane
Overflags bitplane.
Definition: vc1.h:323
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:858
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
int16_t(* block)[6][64]
Definition: vc1.h:384
static double alpha(void *priv, double x, double y)
Definition: vf_geq.c:99
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int has_b_frames
Size of the frame reordering buffer in the decoder.
Definition: avcodec.h:1971
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:153
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
ERContext er
Definition: mpegvideo.h:550
int capabilities
Codec capabilities.
Definition: avcodec.h:3561
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
#define IS_MARKER(state)
Definition: dca_parser.c:49
uint8_t * mv_f_next_base
Definition: vc1.h:351
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1744
simple assert() macros that are a bit more flexible than ISO C assert().
void ff_vc1_decode_blocks(VC1Context *v)
Definition: vc1_block.c:2929
#define PICT_TOP_FIELD
Definition: mpegutils.h:37
const char * name
Name of the codec implementation.
Definition: avcodec.h:3549
int low_delay
no reordering needed / has no B-frames
Definition: mpegvideo.h:404
qpel_mc_func put_qpel_pixels_tab[2][16]
Definition: qpeldsp.h:73
GetBitContext gb
Definition: mpegvideo.h:445
GLsizei count
Definition: opengl_enc.c:109
void ff_mpv_common_end(MpegEncContext *s)
Definition: mpegvideo.c:1115
#define FFMAX(a, b)
Definition: common.h:94
uint8_t * blk_mv_type
0: frame MV, 1: field MV (interlaced frame)
Definition: vc1.h:349
void ff_mpeg_flush(AVCodecContext *avctx)
Definition: mpegvideo.c:2771
int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext *gb)
Definition: vc1.c:844
const uint8_t ff_vc1_adv_interlaced_8x8_zz[64]
Definition: vc1data.c:1047
const uint8_t ff_wmv1_scantable[WMV1_SCANTABLE_COUNT][64]
Definition: msmpeg4data.c:1809
enum AVPixelFormat * pix_fmts
array of supported pixel formats, or NULL if unknown, array is terminated by -1
Definition: avcodec.h:3563
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:258
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2936
#define FFMIN(a, b)
Definition: common.h:96
int next_p_frame_damaged
set if the next p frame is damaged, to avoid showing trashed B-frames
Definition: mpegvideo.h:360
uint8_t * blk_mv_type_base
Definition: vc1.h:349
#define width
int field_mode
1 for interlaced field pictures
Definition: vc1.h:352
av_cold void ff_intrax8_common_end(IntraX8Context *w)
Destroy IntraX8 frame structure.
Definition: intrax8.c:768
int width
picture width / height.
Definition: avcodec.h:1836
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:181
int mb_off
Definition: vc1.h:364
void ff_mpeg_er_frame_start(MpegEncContext *s)
Definition: mpeg_er.c:46
int size_in_bits
Definition: get_bits.h:58
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:2364
int ff_vc1_parse_frame_header(VC1Context *v, GetBitContext *gb)
Definition: vc1.c:627
int level
level
Definition: avcodec.h:3242
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:83
MotionEstContext me
Definition: mpegvideo.h:282
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2947
uint32_t * cbp
Definition: vc1.h:386
int left_blk_sh
Definition: vc1.h:240
int16_t(* luma_mv_base)[2]
Definition: vc1.h:388
uint8_t * fieldtx_plane
Definition: vc1.h:346
int * ttblk_base
Definition: vc1.h:259
VLC * cbpcy_vlc
CBPCY VLC table.
Definition: vc1.h:284
uint8_t * sr_rows[2][2]
Sprite resizer line cache.
Definition: vc1.h:377
int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
Select the (possibly hardware accelerated) pixel format.
Definition: utils.c:1090
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
av_cold void ff_vc1_init_transposed_scantables(VC1Context *v)
Definition: vc1dec.c:403
int res_sprite
Simple/Main Profile sequence header.
Definition: vc1.h:183
int top_blk_sh
Either 3 or 0, positions of l/t in blk[].
Definition: vc1.h:240
Libavcodec external API header.
static av_always_inline int vc1_unescape_buffer(const uint8_t *src, int size, uint8_t *dst)
Definition: vc1_common.h:70
ptrdiff_t linesize
line size, in bytes, may be different from width
Definition: mpegvideo.h:131
enum AVCodecID codec_id
Definition: avcodec.h:1666
BlockDSPContext bdsp
Definition: mpegvideo.h:223
av_cold void ff_blockdsp_init(BlockDSPContext *c, AVCodecContext *avctx)
Definition: blockdsp.c:58
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:215
int debug
debug
Definition: avcodec.h:2888
uint32_t * cbp_base
Definition: vc1.h:386
main external API structure.
Definition: avcodec.h:1649
uint8_t * is_intra
Definition: vc1.h:387
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:97
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:928
void * buf
Definition: avisynth_c.h:553
void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict)
Definition: mpegvideo.c:1961
void(* sprite_v_double_noscale)(uint8_t *dst, const uint8_t *src1a, const uint8_t *src2a, int alpha, int width)
Definition: vc1dsp.h:69
int extradata_size
Definition: avcodec.h:1765
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:299
int sprite_width
Definition: vc1.h:376
uint8_t * is_intra_base
Definition: vc1.h:387
int coded_height
Definition: avcodec.h:1851
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:292
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2378
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:2371
struct AVFrame * f
Definition: mpegpicture.h:46
HW acceleration through VDPAU, Picture.data[3] contains a VdpVideoSurface.
Definition: pixfmt.h:208
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:406
int context_initialized
Definition: mpegvideo.h:121
ptrdiff_t uvlinesize
line size, for chroma in bytes, may be different from width
Definition: mpegvideo.h:132
int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx)
generic function called after decoding the header and before a frame is decoded.
Definition: mpegvideo.c:1189
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:332
av_cold int ff_vc1_decode_init_alloc_tables(VC1Context *v)
Definition: vc1dec.c:324
uint8_t * direct_mb_plane
bitplane for "direct" MBs
Definition: vc1.h:287
HW decoding through DXVA2, Picture.data[3] contains a LPDIRECT3DSURFACE9 pointer. ...
Definition: pixfmt.h:148
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:209
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:262
AVCodec ff_vc1_decoder
Definition: vc1dec.c:1127
uint8_t * mv_type_mb_plane
bitplane for mv_type == (4MV)
Definition: vc1.h:286
int blocks_off
Definition: vc1.h:364
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:484
uint8_t tff
Definition: vc1.h:311
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:198
qpel_mc_func(* qpel_avg)[16]
Definition: motion_est.h:92
int b8_stride
2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
Definition: mpegvideo.h:128
the normal 219*2^(n-8) "MPEG" YUV ranges
Definition: pixfmt.h:456
MpegEncContext s
Definition: vc1.h:174
MpegEncContext.
Definition: mpegvideo.h:78
Picture * next_picture_ptr
pointer to the next picture (for bidir pred)
Definition: mpegvideo.h:180
struct AVCodecContext * avctx
Definition: mpegvideo.h:95
VC-1 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstrea...
Definition: pixfmt.h:108
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:722
#define transpose(x)
const AVProfile ff_vc1_profiles[]
Definition: profiles.c:115
discard all non reference
Definition: avcodec.h:780
static const AVProfile profiles[]
Definition: libfaac.c:216
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
Y , 8bpp.
Definition: pixfmt.h:70
common internal api header.
int mb_stride
mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 ...
Definition: mpegvideo.h:127
int output_width
Definition: vc1.h:376
enum FrameCodingMode fcm
Frame decoding info for Advanced profile.
Definition: vc1.h:308
static double c[64]
Picture last_picture
copy of the previous picture structure.
Definition: mpegvideo.h:159
Picture * last_picture_ptr
pointer to the previous picture.
Definition: mpegvideo.h:179
Bi-dir predicted.
Definition: avutil.h:268
int res_fasttx
reserved, always 1
Definition: vc1.h:187
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:208
int pic_header_flag
Definition: vc1.h:369
int * ttblk
Transform type at the block level.
Definition: vc1.h:259
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:71
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:731
void * priv_data
Definition: avcodec.h:1691
int ff_vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)
Definition: vc1.c:509
#define PICT_FRAME
Definition: mpegutils.h:39
int picture_structure
Definition: mpegvideo.h:457
#define av_free(p)
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:323
AVFrame * sprite_output_frame
Definition: vc1.h:375
void ff_mpv_frame_end(MpegEncContext *s)
Definition: mpegvideo.c:1421
uint8_t zzi_8x8[64]
Definition: vc1.h:348
void(* sprite_v_single)(uint8_t *dst, const uint8_t *src1a, const uint8_t *src1b, int offset, int width)
Definition: vc1dsp.h:68
int16_t(* block)[64]
points to one of the following blocks
Definition: mpegvideo.h:497
static uint8_t tmp[8]
Definition: des.c:38
uint8_t rptfrm
Definition: vc1.h:311
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:253
H264ChromaContext h264chroma
Definition: vc1.h:176
int level
Advanced Profile.
Definition: vc1.h:197
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:553
HW decoding through Direct3D11, Picture.data[3] contains a ID3D11VideoDecoderOutputView pointer...
Definition: pixfmt.h:242
int new_sprite
Frame decoding info for sprite modes.
Definition: vc1.h:373
uint8_t * mv_f_next[2]
Definition: vc1.h:351
av_cold void ff_qpeldsp_init(QpelDSPContext *c)
Definition: qpeldsp.c:783
#define FFSWAP(type, a, b)
Definition: common.h:99
int two_sprites
Definition: vc1.h:374
uint8_t * mb_type[3]
Definition: vc1.h:264
uint16_t * hrd_buffer
Definition: vc1.h:326
int(* decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Callback for each slice.
Definition: avcodec.h:3739
int(* end_frame)(AVCodecContext *avctx)
Called at the end of each frame or field picture.
Definition: avcodec.h:3750
void ff_vdpau_vc1_decode_picture(MpegEncContext *s, const uint8_t *buf, int buf_size)
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
This structure stores compressed data.
Definition: avcodec.h:1557
static av_always_inline const uint8_t * find_next_marker(const uint8_t *src, const uint8_t *end)
Find VC-1 marker in buffer.
Definition: vc1_common.h:59
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:252
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:956
VC1DSPContext vc1dsp
Definition: vc1.h:177
static int vc1_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Decode a VC1/WMV3 frame.
Definition: vc1dec.c:622
int output_height
Definition: vc1.h:376
void(* sprite_h)(uint8_t *dst, const uint8_t *src, int offset, int advance, int count)
Definition: vc1dsp.h:67