FFmpeg  4.3.6
wmv2dec.c
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1 /*
2  * Copyright (c) 2002 The FFmpeg Project
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "avcodec.h"
22 #include "h263.h"
23 #include "internal.h"
24 #include "intrax8.h"
25 #include "mathops.h"
26 #include "mpegutils.h"
27 #include "mpegvideo.h"
28 #include "msmpeg4.h"
29 #include "msmpeg4data.h"
30 #include "wmv2.h"
31 
32 
34 {
35  int mb_x, mb_y;
36  int coded_mb_count = 0;
37  MpegEncContext *const s = &w->s;
38  uint32_t *const mb_type = s->current_picture_ptr->mb_type;
39 
40  w->skip_type = get_bits(&s->gb, 2);
41  switch (w->skip_type) {
42  case SKIP_TYPE_NONE:
43  for (mb_y = 0; mb_y < s->mb_height; mb_y++)
44  for (mb_x = 0; mb_x < s->mb_width; mb_x++)
45  mb_type[mb_y * s->mb_stride + mb_x] =
47  break;
48  case SKIP_TYPE_MPEG:
49  if (get_bits_left(&s->gb) < s->mb_height * s->mb_width)
50  return AVERROR_INVALIDDATA;
51  for (mb_y = 0; mb_y < s->mb_height; mb_y++)
52  for (mb_x = 0; mb_x < s->mb_width; mb_x++)
53  mb_type[mb_y * s->mb_stride + mb_x] =
55  break;
56  case SKIP_TYPE_ROW:
57  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
58  if (get_bits_left(&s->gb) < 1)
59  return AVERROR_INVALIDDATA;
60  if (get_bits1(&s->gb)) {
61  for (mb_x = 0; mb_x < s->mb_width; mb_x++)
62  mb_type[mb_y * s->mb_stride + mb_x] =
64  } else {
65  for (mb_x = 0; mb_x < s->mb_width; mb_x++)
66  mb_type[mb_y * s->mb_stride + mb_x] =
68  }
69  }
70  break;
71  case SKIP_TYPE_COL:
72  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
73  if (get_bits_left(&s->gb) < 1)
74  return AVERROR_INVALIDDATA;
75  if (get_bits1(&s->gb)) {
76  for (mb_y = 0; mb_y < s->mb_height; mb_y++)
77  mb_type[mb_y * s->mb_stride + mb_x] =
79  } else {
80  for (mb_y = 0; mb_y < s->mb_height; mb_y++)
81  mb_type[mb_y * s->mb_stride + mb_x] =
83  }
84  }
85  break;
86  }
87 
88  for (mb_y = 0; mb_y < s->mb_height; mb_y++)
89  for (mb_x = 0; mb_x < s->mb_width; mb_x++)
90  coded_mb_count += !IS_SKIP(mb_type[mb_y * s->mb_stride + mb_x]);
91 
92  if (coded_mb_count > get_bits_left(&s->gb))
93  return AVERROR_INVALIDDATA;
94 
95  return 0;
96 }
97 
99 {
100  MpegEncContext *const s = &w->s;
101  GetBitContext gb;
102  int fps;
103  int code;
104 
105  if (s->avctx->extradata_size < 4)
106  return AVERROR_INVALIDDATA;
107 
108  init_get_bits(&gb, s->avctx->extradata, 32);
109 
110  fps = get_bits(&gb, 5);
111  s->bit_rate = get_bits(&gb, 11) * 1024;
112  w->mspel_bit = get_bits1(&gb);
113  s->loop_filter = get_bits1(&gb);
114  w->abt_flag = get_bits1(&gb);
115  w->j_type_bit = get_bits1(&gb);
116  w->top_left_mv_flag = get_bits1(&gb);
117  w->per_mb_rl_bit = get_bits1(&gb);
118  code = get_bits(&gb, 3);
119 
120  if (code == 0)
121  return AVERROR_INVALIDDATA;
122 
123  s->slice_height = s->mb_height / code;
124 
125  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
127  "fps:%d, br:%"PRId64", qpbit:%d, abt_flag:%d, j_type_bit:%d, "
128  "tl_mv_flag:%d, mbrl_bit:%d, code:%d, loop_filter:%d, "
129  "slices:%d\n",
130  fps, s->bit_rate, w->mspel_bit, w->abt_flag, w->j_type_bit,
131  w->top_left_mv_flag, w->per_mb_rl_bit, code, s->loop_filter,
132  code);
133  return 0;
134 }
135 
137 {
138  Wmv2Context *const w = (Wmv2Context *) s;
139  int code;
140 
141  if (s->picture_number == 0)
143 
144  s->pict_type = get_bits1(&s->gb) + 1;
145  if (s->pict_type == AV_PICTURE_TYPE_I) {
146  code = get_bits(&s->gb, 7);
147  av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code);
148  }
149  s->chroma_qscale = s->qscale = get_bits(&s->gb, 5);
150  if (s->qscale <= 0)
151  return AVERROR_INVALIDDATA;
152 
153  if (s->pict_type != AV_PICTURE_TYPE_I && show_bits(&s->gb, 1)) {
154  GetBitContext gb = s->gb;
155  int skip_type = get_bits(&gb, 2);
156  int run = skip_type == SKIP_TYPE_COL ? s->mb_width : s->mb_height;
157 
158  while (run > 0) {
159  int block = FFMIN(run, 25);
160  if (get_bits(&gb, block) + 1 != 1<<block)
161  break;
162  run -= block;
163  }
164  if (!run)
165  return FRAME_SKIPPED;
166  }
167 
168  return 0;
169 }
170 
172 {
173  Wmv2Context *const w = (Wmv2Context *) s;
174 
175  if (s->pict_type == AV_PICTURE_TYPE_I) {
176  if (w->j_type_bit)
177  w->j_type = get_bits1(&s->gb);
178  else
179  w->j_type = 0; // FIXME check
180 
181  if (!w->j_type) {
182  if (w->per_mb_rl_bit)
183  s->per_mb_rl_table = get_bits1(&s->gb);
184  else
185  s->per_mb_rl_table = 0;
186 
187  if (!s->per_mb_rl_table) {
189  s->rl_table_index = decode012(&s->gb);
190  }
191 
192  s->dc_table_index = get_bits1(&s->gb);
193 
194  // at minimum one bit per macroblock is required at least in a valid frame,
195  // we discard frames much smaller than this. Frames smaller than 1/8 of the
196  // smallest "black/skip" frame generally contain not much recoverable content
197  // while at the same time they have the highest computational requirements
198  // per byte
199  if (get_bits_left(&s->gb) * 8LL < (s->width+15)/16 * ((s->height+15)/16))
200  return AVERROR_INVALIDDATA;
201  }
202  s->inter_intra_pred = 0;
203  s->no_rounding = 1;
204  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
206  "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n",
209  }
210  } else {
211  int cbp_index;
212  int ret;
213  w->j_type = 0;
214 
215  ret = parse_mb_skip(w);
216  if (ret < 0)
217  return ret;
218  cbp_index = decode012(&s->gb);
219  w->cbp_table_index = wmv2_get_cbp_table_index(s, cbp_index);
220 
221  if (w->mspel_bit)
222  s->mspel = get_bits1(&s->gb);
223  else
224  s->mspel = 0; // FIXME check
225 
226  if (w->abt_flag) {
227  w->per_mb_abt = get_bits1(&s->gb) ^ 1;
228  if (!w->per_mb_abt)
229  w->abt_type = decode012(&s->gb);
230  }
231 
232  if (w->per_mb_rl_bit)
233  s->per_mb_rl_table = get_bits1(&s->gb);
234  else
235  s->per_mb_rl_table = 0;
236 
237  if (!s->per_mb_rl_table) {
238  s->rl_table_index = decode012(&s->gb);
240  }
241 
242  if (get_bits_left(&s->gb) < 2)
243  return AVERROR_INVALIDDATA;
244 
245  s->dc_table_index = get_bits1(&s->gb);
246  s->mv_table_index = get_bits1(&s->gb);
247 
248  s->inter_intra_pred = 0; // (s->width * s->height < 320 * 240 && s->bit_rate <= II_BITRATE);
249  s->no_rounding ^= 1;
250 
251  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
253  "rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d mspel:%d "
254  "per_mb_abt:%d abt_type:%d cbp:%d ii:%d\n",
257  s->per_mb_rl_table, s->qscale, s->mspel,
259  s->inter_intra_pred);
260  }
261  }
262  s->esc3_level_length = 0;
263  s->esc3_run_length = 0;
264  s->picture_number++; // FIXME ?
265 
266  if (w->j_type) {
268  &s->gb, &s->mb_x, &s->mb_y,
269  2 * s->qscale, (s->qscale - 1) | 1,
270  s->loop_filter, s->low_delay);
271 
272  ff_er_add_slice(&w->s.er, 0, 0,
273  (w->s.mb_x >> 1) - 1, (w->s.mb_y >> 1) - 1,
274  ER_MB_END);
275  return 1;
276  }
277 
278  return 0;
279 }
280 
281 static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr)
282 {
283  MpegEncContext *const s = &w->s;
284  int ret;
285 
286  ret = ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr);
287 
288  if (ret < 0)
289  return ret;
290 
291  if ((((*mx_ptr) | (*my_ptr)) & 1) && s->mspel)
292  w->hshift = get_bits1(&s->gb);
293  else
294  w->hshift = 0;
295 
296  return 0;
297 }
298 
299 static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py)
300 {
301  MpegEncContext *const s = &w->s;
302  int xy, wrap, diff, type;
303  int16_t *A, *B, *C, *mot_val;
304 
305  wrap = s->b8_stride;
306  xy = s->block_index[0];
307 
308  mot_val = s->current_picture.motion_val[0][xy];
309 
310  A = s->current_picture.motion_val[0][xy - 1];
311  B = s->current_picture.motion_val[0][xy - wrap];
312  C = s->current_picture.motion_val[0][xy + 2 - wrap];
313 
314  if (s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag)
315  diff = FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1]));
316  else
317  diff = 0;
318 
319  if (diff >= 8)
320  type = get_bits1(&s->gb);
321  else
322  type = 2;
323 
324  if (type == 0) {
325  *px = A[0];
326  *py = A[1];
327  } else if (type == 1) {
328  *px = B[0];
329  *py = B[1];
330  } else {
331  /* special case for first (slice) line */
332  if (s->first_slice_line) {
333  *px = A[0];
334  *py = A[1];
335  } else {
336  *px = mid_pred(A[0], B[0], C[0]);
337  *py = mid_pred(A[1], B[1], C[1]);
338  }
339  }
340 
341  return mot_val;
342 }
343 
344 static inline int wmv2_decode_inter_block(Wmv2Context *w, int16_t *block,
345  int n, int cbp)
346 {
347  MpegEncContext *const s = &w->s;
348  static const int sub_cbp_table[3] = { 2, 3, 1 };
349  int sub_cbp, ret;
350 
351  if (!cbp) {
352  s->block_last_index[n] = -1;
353  return 0;
354  }
355 
356  if (w->per_block_abt)
357  w->abt_type = decode012(&s->gb);
358  w->abt_type_table[n] = w->abt_type;
359 
360  if (w->abt_type) {
361 // const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].permutated;
362  const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].scantable;
363 // const uint8_t *scantable = w->abt_type - 1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
364 
365  sub_cbp = sub_cbp_table[decode012(&s->gb)];
366 
367  if (sub_cbp & 1)
368  if ((ret = ff_msmpeg4_decode_block(s, block, n, 1, scantable)) < 0)
369  return ret;
370 
371  if (sub_cbp & 2)
372  if ((ret = ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable)) < 0)
373  return ret;
374 
375  s->block_last_index[n] = 63;
376 
377  return 0;
378  } else {
379  return ff_msmpeg4_decode_block(s, block, n, 1,
381  }
382 }
383 
385 {
386  Wmv2Context *const w = (Wmv2Context *) s;
387  int cbp, code, i, ret;
388  uint8_t *coded_val;
389 
390  if (w->j_type)
391  return 0;
392 
393  if (s->pict_type == AV_PICTURE_TYPE_P) {
394  if (IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])) {
395  /* skip mb */
396  s->mb_intra = 0;
397  for (i = 0; i < 6; i++)
398  s->block_last_index[i] = -1;
399  s->mv_dir = MV_DIR_FORWARD;
400  s->mv_type = MV_TYPE_16X16;
401  s->mv[0][0][0] = 0;
402  s->mv[0][0][1] = 0;
403  s->mb_skipped = 1;
404  w->hshift = 0;
405  return 0;
406  }
407  if (get_bits_left(&s->gb) <= 0)
408  return AVERROR_INVALIDDATA;
409 
412  if (code < 0)
413  return AVERROR_INVALIDDATA;
414  s->mb_intra = (~code & 0x40) >> 6;
415 
416  cbp = code & 0x3f;
417  } else {
418  s->mb_intra = 1;
419  if (get_bits_left(&s->gb) <= 0)
420  return AVERROR_INVALIDDATA;
422  if (code < 0) {
424  "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
425  return AVERROR_INVALIDDATA;
426  }
427  /* predict coded block pattern */
428  cbp = 0;
429  for (i = 0; i < 6; i++) {
430  int val = ((code >> (5 - i)) & 1);
431  if (i < 4) {
432  int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val);
433  val = val ^ pred;
434  *coded_val = val;
435  }
436  cbp |= val << (5 - i);
437  }
438  }
439 
440  if (!s->mb_intra) {
441  int mx, my;
442  wmv2_pred_motion(w, &mx, &my);
443 
444  if (cbp) {
445  s->bdsp.clear_blocks(s->block[0]);
446  if (s->per_mb_rl_table) {
447  s->rl_table_index = decode012(&s->gb);
449  }
450 
451  if (w->abt_flag && w->per_mb_abt) {
452  w->per_block_abt = get_bits1(&s->gb);
453  if (!w->per_block_abt)
454  w->abt_type = decode012(&s->gb);
455  } else
456  w->per_block_abt = 0;
457  }
458 
459  if ((ret = wmv2_decode_motion(w, &mx, &my)) < 0)
460  return ret;
461 
462  s->mv_dir = MV_DIR_FORWARD;
463  s->mv_type = MV_TYPE_16X16;
464  s->mv[0][0][0] = mx;
465  s->mv[0][0][1] = my;
466 
467  for (i = 0; i < 6; i++) {
468  if ((ret = wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1)) < 0) {
470  "\nerror while decoding inter block: %d x %d (%d)\n",
471  s->mb_x, s->mb_y, i);
472  return ret;
473  }
474  }
475  } else {
476  if (s->pict_type == AV_PICTURE_TYPE_P)
477  ff_dlog(s->avctx, "%d%d ", s->inter_intra_pred, cbp);
478  ff_dlog(s->avctx, "I at %d %d %d %06X\n", s->mb_x, s->mb_y,
479  ((cbp & 3) ? 1 : 0) + ((cbp & 0x3C) ? 2 : 0),
480  show_bits(&s->gb, 24));
481  s->ac_pred = get_bits1(&s->gb);
482  if (s->inter_intra_pred) {
485  ff_dlog(s->avctx, "%d%d %d %d/",
486  s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
487  }
488  if (s->per_mb_rl_table && cbp) {
489  s->rl_table_index = decode012(&s->gb);
491  }
492 
493  s->bdsp.clear_blocks(s->block[0]);
494  for (i = 0; i < 6; i++) {
495  if ((ret = ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL)) < 0) {
497  "\nerror while decoding intra block: %d x %d (%d)\n",
498  s->mb_x, s->mb_y, i);
499  return ret;
500  }
501  }
502  }
503 
504  return 0;
505 }
506 
508 {
509  Wmv2Context *const w = avctx->priv_data;
510  int ret;
511 
512  if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
513  return ret;
514 
516 
517  return ff_intrax8_common_init(avctx, &w->x8, &w->s.idsp,
518  w->s.block, w->s.block_last_index,
519  w->s.mb_width, w->s.mb_height);
520 }
521 
523 {
524  Wmv2Context *w = avctx->priv_data;
525 
527  return ff_h263_decode_end(avctx);
528 }
529 
531  .name = "wmv2",
532  .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
533  .type = AVMEDIA_TYPE_VIDEO,
534  .id = AV_CODEC_ID_WMV2,
535  .priv_data_size = sizeof(Wmv2Context),
537  .close = wmv2_decode_end,
540  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
541  AV_PIX_FMT_NONE },
542 };
static av_cold int wmv2_decode_init(AVCodecContext *avctx)
Definition: wmv2dec.c:507
int inter_intra_pred
Definition: mpegvideo.h:444
int j_type_bit
Definition: wmv2.h:39
IDCTDSPContext idsp
Definition: mpegvideo.h:230
#define NULL
Definition: coverity.c:32
int picture_number
Definition: mpegvideo.h:127
#define SKIP_TYPE_COL
Definition: wmv2.h:32
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static av_always_inline int wmv2_get_cbp_table_index(MpegEncContext *s, int cbp_index)
Definition: wmv2.h:74
int esc3_level_length
Definition: mpegvideo.h:440
static av_cold int wmv2_decode_end(AVCodecContext *avctx)
Definition: wmv2dec.c:522
int ff_wmv2_decode_mb(MpegEncContext *s, int16_t block[6][64])
Definition: wmv2dec.c:384
#define C
int ff_wmv2_decode_secondary_picture_header(MpegEncContext *s)
Definition: wmv2dec.c:171
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
#define ER_MB_END
int ff_msmpeg4_decode_init(AVCodecContext *avctx)
Definition: msmpeg4dec.c:301
int16_t abt_block2[6][64]
Definition: wmv2.h:54
static int wmv2_decode_inter_block(Wmv2Context *w, int16_t *block, int n, int cbp)
Definition: wmv2dec.c:344
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int per_mb_abt
Definition: wmv2.h:44
static int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr)
Definition: wmv2dec.c:281
static int decode_ext_header(Wmv2Context *w)
Definition: wmv2dec.c:98
int abt_type_table[6]
Definition: wmv2.h:43
mpegvideo header.
int per_mb_rl_bit
Definition: wmv2.h:49
uint8_t permutated[64]
Definition: idctdsp.h:33
uint8_t run
Definition: svq3.c:209
AVCodec.
Definition: codec.h:190
#define MB_NON_INTRA_VLC_BITS
Definition: msmpeg4.h:34
int qscale
QP.
Definition: mpegvideo.h:204
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
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
static int16_t block[64]
Definition: dct.c:115
int esc3_run_length
Definition: mpegvideo.h:441
uint8_t
#define av_cold
Definition: attributes.h:88
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:1612
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:627
int no_rounding
apply no rounding to motion compensation (MPEG-4, msmpeg4, ...) for B-frames rounding mode is always ...
Definition: mpegvideo.h:284
#define MB_TYPE_16x16
Definition: mpegutils.h:54
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:180
int ff_msmpeg4_decode_motion(MpegEncContext *s, int *mx_ptr, int *my_ptr)
Definition: msmpeg4dec.c:843
MSMPEG4 data tables.
int ff_intrax8_decode_picture(IntraX8Context *w, Picture *pict, GetBitContext *gb, int *mb_x, int *mb_y, int dquant, int quant_offset, int loopfilter, int lowdelay)
Decode single IntraX8 frame.
Definition: intrax8.c:773
#define ff_dlog(a,...)
const uint8_t * scantable
Definition: idctdsp.h:32
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:129
MpegEncContext s
Definition: wmv2.h:36
#define A(x)
Definition: vp56_arith.h:28
#define av_log(a,...)
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
int ff_wmv2_decode_picture_header(MpegEncContext *s)
Definition: wmv2dec.c:136
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
void ff_er_add_slice(ERContext *s, int startx, int starty, int endx, int endy, int status)
Add a slice.
int rl_chroma_table_index
Definition: mpegvideo.h:432
int mb_skipped
MUST BE SET only during DECODING.
Definition: mpegvideo.h:195
void(* clear_blocks)(int16_t *blocks)
Definition: blockdsp.h:37
#define B
Definition: huffyuvdsp.h:32
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
ERContext er
Definition: mpegvideo.h:566
const uint8_t * code
Definition: spdifenc.c:413
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
int per_mb_rl_table
Definition: mpegvideo.h:439
#define wrap(func)
Definition: neontest.h:65
const char * name
Name of the codec implementation.
Definition: codec.h:197
#define IS_SKIP(a)
Definition: mpegutils.h:81
int low_delay
no reordering needed / has no B-frames
Definition: mpegvideo.h:406
AVCodec ff_wmv2_decoder
Definition: wmv2dec.c:530
GetBitContext gb
Definition: mpegvideo.h:448
#define FFMAX(a, b)
Definition: common.h:94
int ff_h263_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: h263dec.c:421
#define AV_CODEC_CAP_DRAW_HORIZ_BAND
Decoder can use draw_horiz_band callback.
Definition: codec.h:44
#define FFMIN(a, b)
Definition: common.h:96
av_cold void ff_intrax8_common_end(IntraX8Context *w)
Destroy IntraX8 frame structure.
Definition: intrax8.c:768
uint8_t w
Definition: llviddspenc.c:38
static int parse_mb_skip(Wmv2Context *w)
Definition: wmv2dec.c:33
int16_t(*[2] motion_val)[2]
Definition: mpegpicture.h:53
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:184
ScanTable abt_scantable[2]
Definition: wmv2.h:53
int abt_type
Definition: wmv2.h:42
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:446
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
#define s(width, name)
Definition: cbs_vp9.c:257
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
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:86
#define FRAME_SKIPPED
Return value for header parsers if frame is not coded.
Definition: mpegutils.h:34
static int16_t * wmv2_pred_motion(Wmv2Context *w, int *px, int *py)
Definition: wmv2dec.c:299
int block_index[6]
index to current MB in block based arrays with edges
Definition: mpegvideo.h:293
static const float pred[4]
Definition: siprdata.h:259
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:266
int first_slice_line
used in MPEG-4 too to handle resync markers
Definition: mpegvideo.h:436
int abt_flag
Definition: wmv2.h:41
Libavcodec external API header.
#define SKIP_TYPE_MPEG
Definition: wmv2.h:30
BlockDSPContext bdsp
Definition: mpegvideo.h:226
int cbp_table_index
Definition: wmv2.h:47
int debug
debug
Definition: avcodec.h:1611
main external API structure.
Definition: avcodec.h:526
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:100
VLC ff_inter_intra_vlc
Definition: msmpeg4dec.c:70
int skip_type
Definition: wmv2.h:50
int extradata_size
Definition: avcodec.h:628
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:659
cl_device_type type
#define MB_INTRA_VLC_BITS
Definition: msmpeg4.h:35
int slice_height
in macroblocks
Definition: mpegvideo.h:435
#define mid_pred
Definition: mathops.h:97
#define MB_TYPE_SKIP
Definition: mpegutils.h:62
#define MV_DIR_FORWARD
Definition: mpegvideo.h:262
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:212
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
int mv[2][4][2]
motion vectors for a macroblock first coordinate : 0 = forward 1 = backward second " : depend...
Definition: mpegvideo.h:276
int b8_stride
2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
Definition: mpegvideo.h:131
MpegEncContext.
Definition: mpegvideo.h:81
struct AVCodecContext * avctx
Definition: mpegvideo.h:98
#define SKIP_TYPE_NONE
Definition: wmv2.h:29
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
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:130
if(ret< 0)
Definition: vf_mcdeint.c:279
VLC ff_mb_non_intra_vlc[4]
Definition: msmpeg4dec.c:64
int per_block_abt
Definition: wmv2.h:45
int ff_h263_decode_end(AVCodecContext *avctx)
Definition: h263dec.c:155
void * priv_data
Definition: avcodec.h:553
int hshift
Definition: wmv2.h:51
static av_always_inline int diff(const uint32_t a, const uint32_t b)
IntraX8Context x8
Definition: wmv2.h:37
av_cold void ff_wmv2_common_init(Wmv2Context *w)
Definition: wmv2.c:31
int16_t(* block)[64]
points to one of the following blocks
Definition: mpegvideo.h:508
static int decode012(GetBitContext *gb)
Definition: get_bits.h:831
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
int64_t bit_rate
wanted bit rate
Definition: mpegvideo.h:103
int rl_table_index
Definition: mpegvideo.h:431
int chroma_qscale
chroma QP
Definition: mpegvideo.h:205
int ff_msmpeg4_decode_block(MpegEncContext *s, int16_t *block, int n, int coded, const uint8_t *scan_table)
Definition: msmpeg4dec.c:656
int mspel_bit
Definition: wmv2.h:46
#define INTER_INTRA_VLC_BITS
Definition: msmpeg4.h:33
uint32_t * mb_type
types and macros are defined in mpegutils.h
Definition: mpegpicture.h:56
VLC ff_msmp4_mb_i_vlc
Definition: msmpeg4data.c:38
ScanTable inter_scantable
if inter == intra then intra should be used to reduce the cache usage
Definition: mpegvideo.h:90
int ff_msmpeg4_coded_block_pred(MpegEncContext *s, int n, uint8_t **coded_block_ptr)
Definition: msmpeg4.c:153
#define SKIP_TYPE_ROW
Definition: wmv2.h:31
int mv_table_index
Definition: mpegvideo.h:430
int h263_aic_dir
AIC direction: 0 = left, 1 = top.
Definition: mpegvideo.h:376
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
static double val(void *priv, double ch)
Definition: aeval.c:76
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:50
int dc_table_index
Definition: mpegvideo.h:433
#define MB_TYPE_L0
Definition: mpegutils.h:67
Predicted.
Definition: avutil.h:275
int top_left_mv_flag
Definition: wmv2.h:48
int j_type
Definition: wmv2.h:40