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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 
33 static void parse_mb_skip(Wmv2Context *w)
34 {
35  int mb_x, mb_y;
36  MpegEncContext *const s = &w->s;
37  uint32_t *const mb_type = s->current_picture_ptr->mb_type;
38 
39  w->skip_type = get_bits(&s->gb, 2);
40  switch (w->skip_type) {
41  case SKIP_TYPE_NONE:
42  for (mb_y = 0; mb_y < s->mb_height; mb_y++)
43  for (mb_x = 0; mb_x < s->mb_width; mb_x++)
44  mb_type[mb_y * s->mb_stride + mb_x] =
46  break;
47  case SKIP_TYPE_MPEG:
48  for (mb_y = 0; mb_y < s->mb_height; mb_y++)
49  for (mb_x = 0; mb_x < s->mb_width; mb_x++)
50  mb_type[mb_y * s->mb_stride + mb_x] =
52  break;
53  case SKIP_TYPE_ROW:
54  for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
55  if (get_bits1(&s->gb)) {
56  for (mb_x = 0; mb_x < s->mb_width; mb_x++)
57  mb_type[mb_y * s->mb_stride + mb_x] =
59  } else {
60  for (mb_x = 0; mb_x < s->mb_width; mb_x++)
61  mb_type[mb_y * s->mb_stride + mb_x] =
63  }
64  }
65  break;
66  case SKIP_TYPE_COL:
67  for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
68  if (get_bits1(&s->gb)) {
69  for (mb_y = 0; mb_y < s->mb_height; mb_y++)
70  mb_type[mb_y * s->mb_stride + mb_x] =
72  } else {
73  for (mb_y = 0; mb_y < s->mb_height; mb_y++)
74  mb_type[mb_y * s->mb_stride + mb_x] =
76  }
77  }
78  break;
79  }
80 }
81 
83 {
84  MpegEncContext *const s = &w->s;
85  GetBitContext gb;
86  int fps;
87  int code;
88 
89  if (s->avctx->extradata_size < 4)
90  return AVERROR_INVALIDDATA;
91 
92  init_get_bits(&gb, s->avctx->extradata, 32);
93 
94  fps = get_bits(&gb, 5);
95  s->bit_rate = get_bits(&gb, 11) * 1024;
96  w->mspel_bit = get_bits1(&gb);
97  s->loop_filter = get_bits1(&gb);
98  w->abt_flag = get_bits1(&gb);
99  w->j_type_bit = get_bits1(&gb);
100  w->top_left_mv_flag = get_bits1(&gb);
101  w->per_mb_rl_bit = get_bits1(&gb);
102  code = get_bits(&gb, 3);
103 
104  if (code == 0)
105  return AVERROR_INVALIDDATA;
106 
107  s->slice_height = s->mb_height / code;
108 
109  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
111  "fps:%d, br:%"PRId64", qpbit:%d, abt_flag:%d, j_type_bit:%d, "
112  "tl_mv_flag:%d, mbrl_bit:%d, code:%d, loop_filter:%d, "
113  "slices:%d\n",
114  fps, s->bit_rate, w->mspel_bit, w->abt_flag, w->j_type_bit,
115  w->top_left_mv_flag, w->per_mb_rl_bit, code, s->loop_filter,
116  code);
117  return 0;
118 }
119 
121 {
122  Wmv2Context *const w = (Wmv2Context *) s;
123  int code;
124 
125  if (s->picture_number == 0)
127 
128  s->pict_type = get_bits1(&s->gb) + 1;
129  if (s->pict_type == AV_PICTURE_TYPE_I) {
130  code = get_bits(&s->gb, 7);
131  av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code);
132  }
133  s->chroma_qscale = s->qscale = get_bits(&s->gb, 5);
134  if (s->qscale <= 0)
135  return AVERROR_INVALIDDATA;
136 
137  return 0;
138 }
139 
141 {
142  Wmv2Context *const w = (Wmv2Context *) s;
143 
144  if (s->pict_type == AV_PICTURE_TYPE_I) {
145  if (w->j_type_bit)
146  w->j_type = get_bits1(&s->gb);
147  else
148  w->j_type = 0; // FIXME check
149 
150  if (!w->j_type) {
151  if (w->per_mb_rl_bit)
152  s->per_mb_rl_table = get_bits1(&s->gb);
153  else
154  s->per_mb_rl_table = 0;
155 
156  if (!s->per_mb_rl_table) {
158  s->rl_table_index = decode012(&s->gb);
159  }
160 
161  s->dc_table_index = get_bits1(&s->gb);
162  }
163  s->inter_intra_pred = 0;
164  s->no_rounding = 1;
165  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
167  "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n",
170  }
171  } else {
172  int cbp_index;
173  w->j_type = 0;
174 
175  parse_mb_skip(w);
176  cbp_index = decode012(&s->gb);
177  w->cbp_table_index = wmv2_get_cbp_table_index(s, cbp_index);
178 
179  if (w->mspel_bit)
180  s->mspel = get_bits1(&s->gb);
181  else
182  s->mspel = 0; // FIXME check
183 
184  if (w->abt_flag) {
185  w->per_mb_abt = get_bits1(&s->gb) ^ 1;
186  if (!w->per_mb_abt)
187  w->abt_type = decode012(&s->gb);
188  }
189 
190  if (w->per_mb_rl_bit)
191  s->per_mb_rl_table = get_bits1(&s->gb);
192  else
193  s->per_mb_rl_table = 0;
194 
195  if (!s->per_mb_rl_table) {
196  s->rl_table_index = decode012(&s->gb);
198  }
199 
200  s->dc_table_index = get_bits1(&s->gb);
201  s->mv_table_index = get_bits1(&s->gb);
202 
203  s->inter_intra_pred = 0; // (s->width * s->height < 320 * 240 && s->bit_rate <= II_BITRATE);
204  s->no_rounding ^= 1;
205 
206  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
208  "rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d mspel:%d "
209  "per_mb_abt:%d abt_type:%d cbp:%d ii:%d\n",
212  s->per_mb_rl_table, s->qscale, s->mspel,
214  s->inter_intra_pred);
215  }
216  }
217  s->esc3_level_length = 0;
218  s->esc3_run_length = 0;
219  s->picture_number++; // FIXME ?
220 
221  if (w->j_type) {
223  &s->gb, &s->mb_x, &s->mb_y,
224  2 * s->qscale, (s->qscale - 1) | 1,
225  s->loop_filter, s->low_delay);
226 
227  ff_er_add_slice(&w->s.er, 0, 0,
228  (w->s.mb_x >> 1) - 1, (w->s.mb_y >> 1) - 1,
229  ER_MB_END);
230  return 1;
231  }
232 
233  return 0;
234 }
235 
236 static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr)
237 {
238  MpegEncContext *const s = &w->s;
239  int ret;
240 
241  ret = ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr);
242 
243  if (ret < 0)
244  return ret;
245 
246  if ((((*mx_ptr) | (*my_ptr)) & 1) && s->mspel)
247  w->hshift = get_bits1(&s->gb);
248  else
249  w->hshift = 0;
250 
251  return 0;
252 }
253 
254 static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py)
255 {
256  MpegEncContext *const s = &w->s;
257  int xy, wrap, diff, type;
258  int16_t *A, *B, *C, *mot_val;
259 
260  wrap = s->b8_stride;
261  xy = s->block_index[0];
262 
263  mot_val = s->current_picture.motion_val[0][xy];
264 
265  A = s->current_picture.motion_val[0][xy - 1];
266  B = s->current_picture.motion_val[0][xy - wrap];
267  C = s->current_picture.motion_val[0][xy + 2 - wrap];
268 
269  if (s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag)
270  diff = FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1]));
271  else
272  diff = 0;
273 
274  if (diff >= 8)
275  type = get_bits1(&s->gb);
276  else
277  type = 2;
278 
279  if (type == 0) {
280  *px = A[0];
281  *py = A[1];
282  } else if (type == 1) {
283  *px = B[0];
284  *py = B[1];
285  } else {
286  /* special case for first (slice) line */
287  if (s->first_slice_line) {
288  *px = A[0];
289  *py = A[1];
290  } else {
291  *px = mid_pred(A[0], B[0], C[0]);
292  *py = mid_pred(A[1], B[1], C[1]);
293  }
294  }
295 
296  return mot_val;
297 }
298 
299 static inline int wmv2_decode_inter_block(Wmv2Context *w, int16_t *block,
300  int n, int cbp)
301 {
302  MpegEncContext *const s = &w->s;
303  static const int sub_cbp_table[3] = { 2, 3, 1 };
304  int sub_cbp, ret;
305 
306  if (!cbp) {
307  s->block_last_index[n] = -1;
308  return 0;
309  }
310 
311  if (w->per_block_abt)
312  w->abt_type = decode012(&s->gb);
313  w->abt_type_table[n] = w->abt_type;
314 
315  if (w->abt_type) {
316 // const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].permutated;
317  const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].scantable;
318 // const uint8_t *scantable = w->abt_type - 1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
319 
320  sub_cbp = sub_cbp_table[decode012(&s->gb)];
321 
322  if (sub_cbp & 1)
323  if ((ret = ff_msmpeg4_decode_block(s, block, n, 1, scantable)) < 0)
324  return ret;
325 
326  if (sub_cbp & 2)
327  if ((ret = ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable)) < 0)
328  return ret;
329 
330  s->block_last_index[n] = 63;
331 
332  return 0;
333  } else {
334  return ff_msmpeg4_decode_block(s, block, n, 1,
336  }
337 }
338 
340 {
341  Wmv2Context *const w = (Wmv2Context *) s;
342  int cbp, code, i, ret;
343  uint8_t *coded_val;
344 
345  if (w->j_type)
346  return 0;
347 
348  if (s->pict_type == AV_PICTURE_TYPE_P) {
349  if (IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])) {
350  /* skip mb */
351  s->mb_intra = 0;
352  for (i = 0; i < 6; i++)
353  s->block_last_index[i] = -1;
354  s->mv_dir = MV_DIR_FORWARD;
355  s->mv_type = MV_TYPE_16X16;
356  s->mv[0][0][0] = 0;
357  s->mv[0][0][1] = 0;
358  s->mb_skipped = 1;
359  w->hshift = 0;
360  return 0;
361  }
362 
365  if (code < 0)
366  return AVERROR_INVALIDDATA;
367  s->mb_intra = (~code & 0x40) >> 6;
368 
369  cbp = code & 0x3f;
370  } else {
371  s->mb_intra = 1;
373  if (code < 0) {
375  "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
376  return AVERROR_INVALIDDATA;
377  }
378  /* predict coded block pattern */
379  cbp = 0;
380  for (i = 0; i < 6; i++) {
381  int val = ((code >> (5 - i)) & 1);
382  if (i < 4) {
383  int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val);
384  val = val ^ pred;
385  *coded_val = val;
386  }
387  cbp |= val << (5 - i);
388  }
389  }
390 
391  if (!s->mb_intra) {
392  int mx, my;
393  wmv2_pred_motion(w, &mx, &my);
394 
395  if (cbp) {
396  s->bdsp.clear_blocks(s->block[0]);
397  if (s->per_mb_rl_table) {
398  s->rl_table_index = decode012(&s->gb);
400  }
401 
402  if (w->abt_flag && w->per_mb_abt) {
403  w->per_block_abt = get_bits1(&s->gb);
404  if (!w->per_block_abt)
405  w->abt_type = decode012(&s->gb);
406  } else
407  w->per_block_abt = 0;
408  }
409 
410  if ((ret = wmv2_decode_motion(w, &mx, &my)) < 0)
411  return ret;
412 
413  s->mv_dir = MV_DIR_FORWARD;
414  s->mv_type = MV_TYPE_16X16;
415  s->mv[0][0][0] = mx;
416  s->mv[0][0][1] = my;
417 
418  for (i = 0; i < 6; i++) {
419  if ((ret = wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1)) < 0) {
421  "\nerror while decoding inter block: %d x %d (%d)\n",
422  s->mb_x, s->mb_y, i);
423  return ret;
424  }
425  }
426  } else {
427  if (s->pict_type == AV_PICTURE_TYPE_P)
428  ff_dlog(s->avctx, "%d%d ", s->inter_intra_pred, cbp);
429  ff_dlog(s->avctx, "I at %d %d %d %06X\n", s->mb_x, s->mb_y,
430  ((cbp & 3) ? 1 : 0) + ((cbp & 0x3C) ? 2 : 0),
431  show_bits(&s->gb, 24));
432  s->ac_pred = get_bits1(&s->gb);
433  if (s->inter_intra_pred) {
436  ff_dlog(s->avctx, "%d%d %d %d/",
437  s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
438  }
439  if (s->per_mb_rl_table && cbp) {
440  s->rl_table_index = decode012(&s->gb);
442  }
443 
444  s->bdsp.clear_blocks(s->block[0]);
445  for (i = 0; i < 6; i++) {
446  if ((ret = ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL)) < 0) {
448  "\nerror while decoding intra block: %d x %d (%d)\n",
449  s->mb_x, s->mb_y, i);
450  return ret;
451  }
452  }
453  }
454 
455  return 0;
456 }
457 
459 {
460  Wmv2Context *const w = avctx->priv_data;
461  int ret;
462 
463 #if FF_API_EMU_EDGE
464  avctx->flags |= CODEC_FLAG_EMU_EDGE;
465 #endif
466 
467  if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
468  return ret;
469 
471 
472  return ff_intrax8_common_init(avctx, &w->x8, &w->s.idsp,
473  w->s.block, w->s.block_last_index,
474  w->s.mb_width, w->s.mb_height);
475 }
476 
478 {
479  Wmv2Context *w = avctx->priv_data;
480 
482  return ff_h263_decode_end(avctx);
483 }
484 
486  .name = "wmv2",
487  .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
488  .type = AVMEDIA_TYPE_VIDEO,
489  .id = AV_CODEC_ID_WMV2,
490  .priv_data_size = sizeof(Wmv2Context),
492  .close = wmv2_decode_end,
495  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
496  AV_PIX_FMT_NONE },
497 };
static av_cold int wmv2_decode_init(AVCodecContext *avctx)
Definition: wmv2dec.c:458
int inter_intra_pred
Definition: mpegvideo.h:441
int j_type_bit
Definition: wmv2.h:39
IDCTDSPContext idsp
Definition: mpegvideo.h:227
#define NULL
Definition: coverity.c:32
#define MB_TYPE_SKIP
Definition: avcodec.h:1264
const char const char void * val
Definition: avisynth_c.h:771
int picture_number
Definition: mpegvideo.h:124
const char * s
Definition: avisynth_c.h:768
#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:437
static av_cold int wmv2_decode_end(AVCodecContext *avctx)
Definition: wmv2dec.c:477
int ff_wmv2_decode_mb(MpegEncContext *s, int16_t block[6][64])
Definition: wmv2dec.c:339
#define C
int ff_wmv2_decode_secondary_picture_header(MpegEncContext *s)
Definition: wmv2dec.c:140
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:247
#define ER_MB_END
int ff_msmpeg4_decode_init(AVCodecContext *avctx)
Definition: msmpeg4dec.c:287
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:299
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int per_mb_abt
Definition: wmv2.h:44
void(* clear_blocks)(int16_t *blocks)
Definition: blockdsp.h:36
static int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr)
Definition: wmv2dec.c:236
static int decode_ext_header(Wmv2Context *w)
Definition: wmv2dec.c:82
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:31
AVCodec.
Definition: avcodec.h:3601
#define MB_NON_INTRA_VLC_BITS
Definition: msmpeg4.h:34
int qscale
QP.
Definition: mpegvideo.h:201
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 int16_t block[64]
Definition: dct.c:113
int esc3_run_length
Definition: mpegvideo.h:438
int ff_intrax8_decode_picture(IntraX8Context *const 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
uint8_t
#define av_cold
Definition: attributes.h:82
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:2918
Definition: vf_geq.c:46
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1791
int no_rounding
apply no rounding to motion compensation (MPEG-4, msmpeg4, ...) for B-frames rounding mode is always ...
Definition: mpegvideo.h:284
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:177
int ff_msmpeg4_decode_motion(MpegEncContext *s, int *mx_ptr, int *my_ptr)
Definition: msmpeg4dec.c:828
MSMPEG4 data tables.
#define ff_dlog(a,...)
const uint8_t * scantable
Definition: idctdsp.h:30
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:126
MpegEncContext s
Definition: wmv2.h:36
#define A(x)
Definition: vp56_arith.h:28
#define av_log(a,...)
int ff_wmv2_decode_picture_header(MpegEncContext *s)
Definition: wmv2dec.c:120
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static void parse_mb_skip(Wmv2Context *w)
Definition: wmv2dec.c:33
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:429
int mb_skipped
MUST BE SET only during DECODING.
Definition: mpegvideo.h:192
#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
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
int per_mb_rl_table
Definition: mpegvideo.h:436
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1771
#define wrap(func)
Definition: neontest.h:65
const char * name
Name of the codec implementation.
Definition: avcodec.h:3608
#define IS_SKIP(a)
Definition: mpegutils.h:83
int low_delay
no reordering needed / has no B-frames
Definition: mpegvideo.h:404
AVCodec ff_wmv2_decoder
Definition: wmv2dec.c:485
GetBitContext gb
Definition: mpegvideo.h:445
#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:409
#define AV_CODEC_CAP_DRAW_HORIZ_BAND
Decoder can use draw_horiz_band callback.
Definition: avcodec.h:953
av_cold void ff_intrax8_common_end(IntraX8Context *w)
Destroy IntraX8 frame structure.
Definition: intrax8.c:768
int16_t(*[2] motion_val)[2]
Definition: mpegpicture.h:53
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:181
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:282
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
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:535
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:83
int n
Definition: avisynth_c.h:684
static int16_t * wmv2_pred_motion(Wmv2Context *w, int *px, int *py)
Definition: wmv2dec.c:254
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:433
int abt_flag
Definition: wmv2.h:41
Libavcodec external API header.
#define SKIP_TYPE_MPEG
Definition: wmv2.h:30
BlockDSPContext bdsp
Definition: mpegvideo.h:223
int cbp_table_index
Definition: wmv2.h:47
int debug
debug
Definition: avcodec.h:2917
main external API structure.
Definition: avcodec.h:1676
VLC ff_inter_intra_vlc
Definition: msmpeg4dec.c:70
int skip_type
Definition: wmv2.h:50
GLint GLenum type
Definition: opengl_enc.c:105
int extradata_size
Definition: avcodec.h:1792
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:299
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:406
#define MB_INTRA_VLC_BITS
Definition: msmpeg4.h:35
int slice_height
in macroblocks
Definition: mpegvideo.h:432
#define MB_TYPE_16x16
Definition: avcodec.h:1256
#define mid_pred
Definition: mathops.h:96
#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:209
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:262
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:128
MpegEncContext.
Definition: mpegvideo.h:78
struct AVCodecContext * avctx
Definition: mpegvideo.h:95
#define SKIP_TYPE_NONE
Definition: wmv2.h:29
#define CODEC_FLAG_EMU_EDGE
Definition: avcodec.h:1097
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
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
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:149
void * priv_data
Definition: avcodec.h:1718
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:497
static int decode012(GetBitContext *gb)
Definition: get_bits.h:550
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
int64_t bit_rate
wanted bit rate
Definition: mpegvideo.h:100
int rl_table_index
Definition: mpegvideo.h:428
int chroma_qscale
chroma QP
Definition: mpegvideo.h:202
int ff_msmpeg4_decode_block(MpegEncContext *s, int16_t *block, int n, int coded, const uint8_t *scan_table)
Definition: msmpeg4dec.c:641
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:87
static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
Definition: ffmpeg.c:2045
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:427
int h263_aic_dir
AIC direction: 0 = left, 1 = top.
Definition: mpegvideo.h:376
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:959
int dc_table_index
Definition: mpegvideo.h:430
for(j=16;j >0;--j)
#define MB_TYPE_L0
Definition: avcodec.h:1269
Predicted.
Definition: avutil.h:269
int top_left_mv_flag
Definition: wmv2.h:48
int j_type
Definition: wmv2.h:40