FFmpeg
h264_ps.c
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1 /*
2  * H.26L/H.264/AVC/JVT/14496-10/... parameter set decoding
3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * H.264 / AVC / MPEG-4 part10 parameter set decoding.
25  * @author Michael Niedermayer <michaelni@gmx.at>
26  */
27 
28 #include <inttypes.h>
29 
30 #include "libavutil/imgutils.h"
31 #include "internal.h"
32 #include "mathops.h"
33 #include "avcodec.h"
34 #include "h264data.h"
35 #include "h264_ps.h"
36 #include "golomb.h"
37 
38 #define MIN_LOG2_MAX_FRAME_NUM 4
39 
40 #define EXTENDED_SAR 255
41 
42 static const uint8_t default_scaling4[2][16] = {
43  { 6, 13, 20, 28, 13, 20, 28, 32,
44  20, 28, 32, 37, 28, 32, 37, 42 },
45  { 10, 14, 20, 24, 14, 20, 24, 27,
46  20, 24, 27, 30, 24, 27, 30, 34 }
47 };
48 
49 static const uint8_t default_scaling8[2][64] = {
50  { 6, 10, 13, 16, 18, 23, 25, 27,
51  10, 11, 16, 18, 23, 25, 27, 29,
52  13, 16, 18, 23, 25, 27, 29, 31,
53  16, 18, 23, 25, 27, 29, 31, 33,
54  18, 23, 25, 27, 29, 31, 33, 36,
55  23, 25, 27, 29, 31, 33, 36, 38,
56  25, 27, 29, 31, 33, 36, 38, 40,
57  27, 29, 31, 33, 36, 38, 40, 42 },
58  { 9, 13, 15, 17, 19, 21, 22, 24,
59  13, 13, 17, 19, 21, 22, 24, 25,
60  15, 17, 19, 21, 22, 24, 25, 27,
61  17, 19, 21, 22, 24, 25, 27, 28,
62  19, 21, 22, 24, 25, 27, 28, 30,
63  21, 22, 24, 25, 27, 28, 30, 32,
64  22, 24, 25, 27, 28, 30, 32, 33,
65  24, 25, 27, 28, 30, 32, 33, 35 }
66 };
67 
68 /* maximum number of MBs in the DPB for a given level */
69 static const int level_max_dpb_mbs[][2] = {
70  { 10, 396 },
71  { 11, 900 },
72  { 12, 2376 },
73  { 13, 2376 },
74  { 20, 2376 },
75  { 21, 4752 },
76  { 22, 8100 },
77  { 30, 8100 },
78  { 31, 18000 },
79  { 32, 20480 },
80  { 40, 32768 },
81  { 41, 32768 },
82  { 42, 34816 },
83  { 50, 110400 },
84  { 51, 184320 },
85  { 52, 184320 },
86 };
87 
88 static void remove_pps(H264ParamSets *s, int id)
89 {
90  av_buffer_unref(&s->pps_list[id]);
91 }
92 
93 static void remove_sps(H264ParamSets *s, int id)
94 {
95 #if 0
96  int i;
97  if (s->sps_list[id]) {
98  /* drop all PPS that depend on this SPS */
99  for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
100  if (s->pps_list[i] && ((PPS*)s->pps_list[i]->data)->sps_id == id)
101  remove_pps(s, i);
102  }
103 #endif
104  av_buffer_unref(&s->sps_list[id]);
105 }
106 
107 static inline int decode_hrd_parameters(GetBitContext *gb, void *logctx,
108  SPS *sps)
109 {
110  int cpb_count, i;
111  cpb_count = get_ue_golomb_31(gb) + 1;
112 
113  if (cpb_count > 32U) {
114  av_log(logctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
115  return AVERROR_INVALIDDATA;
116  }
117 
118  get_bits(gb, 4); /* bit_rate_scale */
119  get_bits(gb, 4); /* cpb_size_scale */
120  for (i = 0; i < cpb_count; i++) {
121  get_ue_golomb_long(gb); /* bit_rate_value_minus1 */
122  get_ue_golomb_long(gb); /* cpb_size_value_minus1 */
123  get_bits1(gb); /* cbr_flag */
124  }
125  sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1;
126  sps->cpb_removal_delay_length = get_bits(gb, 5) + 1;
127  sps->dpb_output_delay_length = get_bits(gb, 5) + 1;
128  sps->time_offset_length = get_bits(gb, 5);
129  sps->cpb_cnt = cpb_count;
130  return 0;
131 }
132 
133 static inline int decode_vui_parameters(GetBitContext *gb, void *logctx,
134  SPS *sps)
135 {
136  int aspect_ratio_info_present_flag;
137  unsigned int aspect_ratio_idc;
138 
139  aspect_ratio_info_present_flag = get_bits1(gb);
140 
141  if (aspect_ratio_info_present_flag) {
142  aspect_ratio_idc = get_bits(gb, 8);
143  if (aspect_ratio_idc == EXTENDED_SAR) {
144  sps->sar.num = get_bits(gb, 16);
145  sps->sar.den = get_bits(gb, 16);
146  } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(ff_h264_pixel_aspect)) {
147  sps->sar = ff_h264_pixel_aspect[aspect_ratio_idc];
148  } else {
149  av_log(logctx, AV_LOG_ERROR, "illegal aspect ratio\n");
150  return AVERROR_INVALIDDATA;
151  }
152  } else {
153  sps->sar.num =
154  sps->sar.den = 0;
155  }
156 
157  if (get_bits1(gb)) /* overscan_info_present_flag */
158  get_bits1(gb); /* overscan_appropriate_flag */
159 
162  get_bits(gb, 3); /* video_format */
163  sps->full_range = get_bits1(gb); /* video_full_range_flag */
164 
167  sps->color_primaries = get_bits(gb, 8); /* colour_primaries */
168  sps->color_trc = get_bits(gb, 8); /* transfer_characteristics */
169  sps->colorspace = get_bits(gb, 8); /* matrix_coefficients */
170 
171  // Set invalid values to "unspecified"
176  if (!av_color_space_name(sps->colorspace))
178  }
179  }
180 
181  /* chroma_location_info_present_flag */
182  if (get_bits1(gb)) {
183  /* chroma_sample_location_type_top_field */
184  sps->chroma_location = get_ue_golomb_31(gb) + 1;
185  get_ue_golomb_31(gb); /* chroma_sample_location_type_bottom_field */
186  } else
188 
189  if (show_bits1(gb) && get_bits_left(gb) < 10) {
190  av_log(logctx, AV_LOG_WARNING, "Truncated VUI (%d)\n", get_bits_left(gb));
191  return 0;
192  }
193 
195  if (sps->timing_info_present_flag) {
196  unsigned num_units_in_tick = get_bits_long(gb, 32);
197  unsigned time_scale = get_bits_long(gb, 32);
198  if (!num_units_in_tick || !time_scale) {
199  av_log(logctx, AV_LOG_ERROR,
200  "time_scale/num_units_in_tick invalid or unsupported (%u/%u)\n",
201  time_scale, num_units_in_tick);
202  sps->timing_info_present_flag = 0;
203  } else {
204  sps->num_units_in_tick = num_units_in_tick;
205  sps->time_scale = time_scale;
206  }
207  sps->fixed_frame_rate_flag = get_bits1(gb);
208  }
209 
212  if (decode_hrd_parameters(gb, logctx, sps) < 0)
213  return AVERROR_INVALIDDATA;
216  if (decode_hrd_parameters(gb, logctx, sps) < 0)
217  return AVERROR_INVALIDDATA;
220  get_bits1(gb); /* low_delay_hrd_flag */
222  if (!get_bits_left(gb))
223  return 0;
225  if (sps->bitstream_restriction_flag) {
226  get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */
227  get_ue_golomb_31(gb); /* max_bytes_per_pic_denom */
228  get_ue_golomb_31(gb); /* max_bits_per_mb_denom */
229  get_ue_golomb_31(gb); /* log2_max_mv_length_horizontal */
230  get_ue_golomb_31(gb); /* log2_max_mv_length_vertical */
232  get_ue_golomb_31(gb); /*max_dec_frame_buffering*/
233 
234  if (get_bits_left(gb) < 0) {
235  sps->num_reorder_frames = 0;
237  }
238 
239  if (sps->num_reorder_frames > 16U
240  /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
241  av_log(logctx, AV_LOG_ERROR,
242  "Clipping illegal num_reorder_frames %d\n",
243  sps->num_reorder_frames);
244  sps->num_reorder_frames = 16;
245  return AVERROR_INVALIDDATA;
246  }
247  }
248 
249  return 0;
250 }
251 
252 static int decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
253  const uint8_t *jvt_list,
254  const uint8_t *fallback_list)
255 {
256  int i, last = 8, next = 8;
257  const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
258  if (!get_bits1(gb)) /* matrix not written, we use the predicted one */
259  memcpy(factors, fallback_list, size * sizeof(uint8_t));
260  else
261  for (i = 0; i < size; i++) {
262  if (next) {
263  int v = get_se_golomb(gb);
264  if (v < -128 || v > 127) {
265  av_log(NULL, AV_LOG_ERROR, "delta scale %d is invalid\n", v);
266  return AVERROR_INVALIDDATA;
267  }
268  next = (last + v) & 0xff;
269  }
270  if (!i && !next) { /* matrix not written, we use the preset one */
271  memcpy(factors, jvt_list, size * sizeof(uint8_t));
272  break;
273  }
274  last = factors[scan[i]] = next ? next : last;
275  }
276  return 0;
277 }
278 
279 /* returns non zero if the provided SPS scaling matrix has been filled */
281  const PPS *pps, int is_sps,
282  uint8_t(*scaling_matrix4)[16],
283  uint8_t(*scaling_matrix8)[64])
284 {
285  int fallback_sps = !is_sps && sps->scaling_matrix_present;
286  const uint8_t *fallback[4] = {
287  fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
288  fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
289  fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
290  fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
291  };
292  int ret = 0;
293  if (get_bits1(gb)) {
294  ret |= decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
295  ret |= decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
296  ret |= decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
297  ret |= decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
298  ret |= decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
299  ret |= decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
300  if (is_sps || pps->transform_8x8_mode) {
301  ret |= decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
302  ret |= decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
303  if (sps->chroma_format_idc == 3) {
304  ret |= decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
305  ret |= decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
306  ret |= decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
307  ret |= decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
308  }
309  }
310  if (!ret)
311  ret = is_sps;
312  }
313 
314  return ret;
315 }
316 
318 {
319  int i;
320 
321  for (i = 0; i < MAX_SPS_COUNT; i++)
322  av_buffer_unref(&ps->sps_list[i]);
323 
324  for (i = 0; i < MAX_PPS_COUNT; i++)
325  av_buffer_unref(&ps->pps_list[i]);
326 
327  av_buffer_unref(&ps->pps_ref);
328 
329  ps->pps = NULL;
330  ps->sps = NULL;
331 }
332 
334  H264ParamSets *ps, int ignore_truncation)
335 {
336  AVBufferRef *sps_buf;
337  int profile_idc, level_idc, constraint_set_flags = 0;
338  unsigned int sps_id;
339  int i, log2_max_frame_num_minus4;
340  SPS *sps;
341  int ret;
342 
343  sps_buf = av_buffer_allocz(sizeof(*sps));
344  if (!sps_buf)
345  return AVERROR(ENOMEM);
346  sps = (SPS*)sps_buf->data;
347 
348  sps->data_size = gb->buffer_end - gb->buffer;
349  if (sps->data_size > sizeof(sps->data)) {
350  av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized SPS\n");
351  sps->data_size = sizeof(sps->data);
352  }
353  memcpy(sps->data, gb->buffer, sps->data_size);
354 
355  profile_idc = get_bits(gb, 8);
356  constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
357  constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
358  constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag
359  constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag
360  constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag
361  constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag
362  skip_bits(gb, 2); // reserved_zero_2bits
363  level_idc = get_bits(gb, 8);
364  sps_id = get_ue_golomb_31(gb);
365 
366  if (sps_id >= MAX_SPS_COUNT) {
367  av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
368  goto fail;
369  }
370 
371  sps->sps_id = sps_id;
372  sps->time_offset_length = 24;
373  sps->profile_idc = profile_idc;
374  sps->constraint_set_flags = constraint_set_flags;
375  sps->level_idc = level_idc;
376  sps->full_range = -1;
377 
378  memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
379  memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
380  sps->scaling_matrix_present = 0;
381  sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
382 
383  if (sps->profile_idc == 100 || // High profile
384  sps->profile_idc == 110 || // High10 profile
385  sps->profile_idc == 122 || // High422 profile
386  sps->profile_idc == 244 || // High444 Predictive profile
387  sps->profile_idc == 44 || // Cavlc444 profile
388  sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
389  sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
390  sps->profile_idc == 118 || // Stereo High profile (MVC)
391  sps->profile_idc == 128 || // Multiview High profile (MVC)
392  sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
393  sps->profile_idc == 144) { // old High444 profile
395  if (sps->chroma_format_idc > 3U) {
396  avpriv_request_sample(avctx, "chroma_format_idc %u",
397  sps->chroma_format_idc);
398  goto fail;
399  } else if (sps->chroma_format_idc == 3) {
402  av_log(avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
403  goto fail;
404  }
405  }
406  sps->bit_depth_luma = get_ue_golomb_31(gb) + 8;
407  sps->bit_depth_chroma = get_ue_golomb_31(gb) + 8;
408  if (sps->bit_depth_chroma != sps->bit_depth_luma) {
409  avpriv_request_sample(avctx,
410  "Different chroma and luma bit depth");
411  goto fail;
412  }
413  if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 ||
414  sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
415  av_log(avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
416  sps->bit_depth_luma, sps->bit_depth_chroma);
417  goto fail;
418  }
419  sps->transform_bypass = get_bits1(gb);
420  ret = decode_scaling_matrices(gb, sps, NULL, 1,
421  sps->scaling_matrix4, sps->scaling_matrix8);
422  if (ret < 0)
423  goto fail;
424  sps->scaling_matrix_present |= ret;
425  } else {
426  sps->chroma_format_idc = 1;
427  sps->bit_depth_luma = 8;
428  sps->bit_depth_chroma = 8;
429  }
430 
431  log2_max_frame_num_minus4 = get_ue_golomb_31(gb);
432  if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
433  log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
434  av_log(avctx, AV_LOG_ERROR,
435  "log2_max_frame_num_minus4 out of range (0-12): %d\n",
436  log2_max_frame_num_minus4);
437  goto fail;
438  }
439  sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
440 
441  sps->poc_type = get_ue_golomb_31(gb);
442 
443  if (sps->poc_type == 0) { // FIXME #define
444  unsigned t = get_ue_golomb_31(gb);
445  if (t>12) {
446  av_log(avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
447  goto fail;
448  }
449  sps->log2_max_poc_lsb = t + 4;
450  } else if (sps->poc_type == 1) { // FIXME #define
454 
455  if ( sps->offset_for_non_ref_pic == INT32_MIN
456  || sps->offset_for_top_to_bottom_field == INT32_MIN
457  ) {
458  av_log(avctx, AV_LOG_ERROR,
459  "offset_for_non_ref_pic or offset_for_top_to_bottom_field is out of range\n");
460  goto fail;
461  }
462 
463  sps->poc_cycle_length = get_ue_golomb(gb);
464 
465  if ((unsigned)sps->poc_cycle_length >=
467  av_log(avctx, AV_LOG_ERROR,
468  "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
469  goto fail;
470  }
471 
472  for (i = 0; i < sps->poc_cycle_length; i++) {
474  if (sps->offset_for_ref_frame[i] == INT32_MIN) {
475  av_log(avctx, AV_LOG_ERROR,
476  "offset_for_ref_frame is out of range\n");
477  goto fail;
478  }
479  }
480  } else if (sps->poc_type != 2) {
481  av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
482  goto fail;
483  }
484 
486  if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
487  sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
489  av_log(avctx, AV_LOG_ERROR,
490  "too many reference frames %d\n", sps->ref_frame_count);
491  goto fail;
492  }
494  sps->mb_width = get_ue_golomb(gb) + 1;
495  sps->mb_height = get_ue_golomb(gb) + 1;
496 
497  sps->frame_mbs_only_flag = get_bits1(gb);
498 
499  if (sps->mb_height >= INT_MAX / 2U) {
500  av_log(avctx, AV_LOG_ERROR, "height overflow\n");
501  goto fail;
502  }
503  sps->mb_height *= 2 - sps->frame_mbs_only_flag;
504 
505  if (!sps->frame_mbs_only_flag)
506  sps->mb_aff = get_bits1(gb);
507  else
508  sps->mb_aff = 0;
509 
510  if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
511  (unsigned)sps->mb_height >= INT_MAX / 16 ||
512  av_image_check_size(16 * sps->mb_width,
513  16 * sps->mb_height, 0, avctx)) {
514  av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
515  goto fail;
516  }
517 
519 
520 #ifndef ALLOW_INTERLACE
521  if (sps->mb_aff)
522  av_log(avctx, AV_LOG_ERROR,
523  "MBAFF support not included; enable it at compile-time.\n");
524 #endif
525  sps->crop = get_bits1(gb);
526  if (sps->crop) {
527  unsigned int crop_left = get_ue_golomb(gb);
528  unsigned int crop_right = get_ue_golomb(gb);
529  unsigned int crop_top = get_ue_golomb(gb);
530  unsigned int crop_bottom = get_ue_golomb(gb);
531  int width = 16 * sps->mb_width;
532  int height = 16 * sps->mb_height;
533 
534  if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
535  av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
536  "values are l:%d r:%d t:%d b:%d\n",
537  crop_left, crop_right, crop_top, crop_bottom);
538 
539  sps->crop_left =
540  sps->crop_right =
541  sps->crop_top =
542  sps->crop_bottom = 0;
543  } else {
544  int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
545  int hsub = (sps->chroma_format_idc == 1 ||
546  sps->chroma_format_idc == 2) ? 1 : 0;
547  int step_x = 1 << hsub;
548  int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
549 
550  if (crop_left > (unsigned)INT_MAX / 4 / step_x ||
551  crop_right > (unsigned)INT_MAX / 4 / step_x ||
552  crop_top > (unsigned)INT_MAX / 4 / step_y ||
553  crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
554  (crop_left + crop_right ) * step_x >= width ||
555  (crop_top + crop_bottom) * step_y >= height
556  ) {
557  av_log(avctx, AV_LOG_ERROR, "crop values invalid %d %d %d %d / %d %d\n", crop_left, crop_right, crop_top, crop_bottom, width, height);
558  goto fail;
559  }
560 
561  sps->crop_left = crop_left * step_x;
562  sps->crop_right = crop_right * step_x;
563  sps->crop_top = crop_top * step_y;
564  sps->crop_bottom = crop_bottom * step_y;
565  }
566  } else {
567  sps->crop_left =
568  sps->crop_right =
569  sps->crop_top =
570  sps->crop_bottom =
571  sps->crop = 0;
572  }
573 
575  if (sps->vui_parameters_present_flag) {
576  int ret = decode_vui_parameters(gb, avctx, sps);
577  if (ret < 0)
578  goto fail;
579  }
580 
581  if (get_bits_left(gb) < 0) {
582  av_log_once(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR, AV_LOG_DEBUG,
584  "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
585  if (!ignore_truncation)
586  goto fail;
587  }
588 
589  /* if the maximum delay is not stored in the SPS, derive it based on the
590  * level */
591  if (!sps->bitstream_restriction_flag &&
594  for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
595  if (level_max_dpb_mbs[i][0] == sps->level_idc) {
596  sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
597  sps->num_reorder_frames);
598  break;
599  }
600  }
601  }
602 
603  if (!sps->sar.den)
604  sps->sar.den = 1;
605 
606  if (avctx->debug & FF_DEBUG_PICT_INFO) {
607  static const char csp[4][5] = { "Gray", "420", "422", "444" };
608  av_log(avctx, AV_LOG_DEBUG,
609  "sps:%u profile:%d/%d poc:%d ref:%d %dx%d %s %s crop:%u/%u/%u/%u %s %s %"PRId32"/%"PRId32" b%d reo:%d\n",
610  sps_id, sps->profile_idc, sps->level_idc,
611  sps->poc_type,
612  sps->ref_frame_count,
613  sps->mb_width, sps->mb_height,
614  sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
615  sps->direct_8x8_inference_flag ? "8B8" : "",
616  sps->crop_left, sps->crop_right,
617  sps->crop_top, sps->crop_bottom,
618  sps->vui_parameters_present_flag ? "VUI" : "",
619  csp[sps->chroma_format_idc],
621  sps->timing_info_present_flag ? sps->time_scale : 0,
622  sps->bit_depth_luma,
624  );
625  }
626 
627  /* check if this is a repeat of an already parsed SPS, then keep the
628  * original one.
629  * otherwise drop all PPSes that depend on it */
630  if (ps->sps_list[sps_id] &&
631  !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
632  av_buffer_unref(&sps_buf);
633  } else {
634  remove_sps(ps, sps_id);
635  ps->sps_list[sps_id] = sps_buf;
636  }
637 
638  return 0;
639 
640 fail:
641  av_buffer_unref(&sps_buf);
642  return AVERROR_INVALIDDATA;
643 }
644 
645 static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
646 {
647  int i, j, q, x;
648  const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
649 
650  for (i = 0; i < 6; i++) {
651  pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
652  for (j = 0; j < i; j++)
653  if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
654  64 * sizeof(uint8_t))) {
655  pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
656  break;
657  }
658  if (j < i)
659  continue;
660 
661  for (q = 0; q < max_qp + 1; q++) {
662  int shift = ff_h264_quant_div6[q];
663  int idx = ff_h264_quant_rem6[q];
664  for (x = 0; x < 64; x++)
665  pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
666  ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
667  pps->scaling_matrix8[i][x]) << shift;
668  }
669  }
670 }
671 
672 static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
673 {
674  int i, j, q, x;
675  const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
676  for (i = 0; i < 6; i++) {
677  pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
678  for (j = 0; j < i; j++)
679  if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
680  16 * sizeof(uint8_t))) {
681  pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
682  break;
683  }
684  if (j < i)
685  continue;
686 
687  for (q = 0; q < max_qp + 1; q++) {
688  int shift = ff_h264_quant_div6[q] + 2;
689  int idx = ff_h264_quant_rem6[q];
690  for (x = 0; x < 16; x++)
691  pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
692  ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
693  pps->scaling_matrix4[i][x]) << shift;
694  }
695  }
696 }
697 
698 static void init_dequant_tables(PPS *pps, const SPS *sps)
699 {
700  int i, x;
701  init_dequant4_coeff_table(pps, sps);
702  memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
703 
704  if (pps->transform_8x8_mode)
705  init_dequant8_coeff_table(pps, sps);
706  if (sps->transform_bypass) {
707  for (i = 0; i < 6; i++)
708  for (x = 0; x < 16; x++)
709  pps->dequant4_coeff[i][0][x] = 1 << 6;
710  if (pps->transform_8x8_mode)
711  for (i = 0; i < 6; i++)
712  for (x = 0; x < 64; x++)
713  pps->dequant8_coeff[i][0][x] = 1 << 6;
714  }
715 }
716 
717 static void build_qp_table(PPS *pps, int t, int index, const int depth)
718 {
719  int i;
720  const int max_qp = 51 + 6 * (depth - 8);
721  for (i = 0; i < max_qp + 1; i++)
722  pps->chroma_qp_table[t][i] =
723  ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
724 }
725 
726 static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
727 {
728  int profile_idc = sps->profile_idc;
729 
730  if ((profile_idc == 66 || profile_idc == 77 ||
731  profile_idc == 88) && (sps->constraint_set_flags & 7)) {
732  av_log(logctx, AV_LOG_VERBOSE,
733  "Current profile doesn't provide more RBSP data in PPS, skipping\n");
734  return 0;
735  }
736 
737  return 1;
738 }
739 
740 static void pps_free(void *opaque, uint8_t *data)
741 {
742  PPS *pps = (PPS*)data;
743 
744  av_buffer_unref(&pps->sps_ref);
745 
746  av_freep(&data);
747 }
748 
750  H264ParamSets *ps, int bit_length)
751 {
752  AVBufferRef *pps_buf;
753  const SPS *sps;
754  unsigned int pps_id = get_ue_golomb(gb);
755  PPS *pps;
756  int qp_bd_offset;
757  int bits_left;
758  int ret;
759 
760  if (pps_id >= MAX_PPS_COUNT) {
761  av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
762  return AVERROR_INVALIDDATA;
763  }
764 
765  pps = av_mallocz(sizeof(*pps));
766  if (!pps)
767  return AVERROR(ENOMEM);
768  pps_buf = av_buffer_create((uint8_t*)pps, sizeof(*pps),
769  pps_free, NULL, 0);
770  if (!pps_buf) {
771  av_freep(&pps);
772  return AVERROR(ENOMEM);
773  }
774 
775  pps->data_size = gb->buffer_end - gb->buffer;
776  if (pps->data_size > sizeof(pps->data)) {
777  av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized PPS "
778  "(%"SIZE_SPECIFIER" > %"SIZE_SPECIFIER")\n",
779  pps->data_size, sizeof(pps->data));
780  pps->data_size = sizeof(pps->data);
781  }
782  memcpy(pps->data, gb->buffer, pps->data_size);
783 
784  pps->sps_id = get_ue_golomb_31(gb);
785  if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
786  !ps->sps_list[pps->sps_id]) {
787  av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
788  ret = AVERROR_INVALIDDATA;
789  goto fail;
790  }
791  pps->sps_ref = av_buffer_ref(ps->sps_list[pps->sps_id]);
792  if (!pps->sps_ref) {
793  ret = AVERROR(ENOMEM);
794  goto fail;
795  }
796  pps->sps = (const SPS*)pps->sps_ref->data;
797  sps = pps->sps;
798 
799  if (sps->bit_depth_luma > 14) {
800  av_log(avctx, AV_LOG_ERROR,
801  "Invalid luma bit depth=%d\n",
802  sps->bit_depth_luma);
803  ret = AVERROR_INVALIDDATA;
804  goto fail;
805  } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
807  "Unimplemented luma bit depth=%d",
808  sps->bit_depth_luma);
809  ret = AVERROR_PATCHWELCOME;
810  goto fail;
811  }
812 
813  pps->cabac = get_bits1(gb);
814  pps->pic_order_present = get_bits1(gb);
815  pps->slice_group_count = get_ue_golomb(gb) + 1;
816  if (pps->slice_group_count > 1) {
818  avpriv_report_missing_feature(avctx, "FMO");
819  ret = AVERROR_PATCHWELCOME;
820  goto fail;
821  }
822  pps->ref_count[0] = get_ue_golomb(gb) + 1;
823  pps->ref_count[1] = get_ue_golomb(gb) + 1;
824  if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
825  av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
826  ret = AVERROR_INVALIDDATA;
827  goto fail;
828  }
829 
830  qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
831 
832  pps->weighted_pred = get_bits1(gb);
833  pps->weighted_bipred_idc = get_bits(gb, 2);
834  pps->init_qp = get_se_golomb(gb) + 26U + qp_bd_offset;
835  pps->init_qs = get_se_golomb(gb) + 26U + qp_bd_offset;
837  if (pps->chroma_qp_index_offset[0] < -12 || pps->chroma_qp_index_offset[0] > 12) {
838  ret = AVERROR_INVALIDDATA;
839  goto fail;
840  }
841 
845 
846  pps->transform_8x8_mode = 0;
847  memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
848  sizeof(pps->scaling_matrix4));
849  memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
850  sizeof(pps->scaling_matrix8));
851 
852  bits_left = bit_length - get_bits_count(gb);
853  if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
854  pps->transform_8x8_mode = get_bits1(gb);
855  ret = decode_scaling_matrices(gb, sps, pps, 0,
856  pps->scaling_matrix4, pps->scaling_matrix8);
857  if (ret < 0)
858  goto fail;
859  // second_chroma_qp_index_offset
861  if (pps->chroma_qp_index_offset[1] < -12 || pps->chroma_qp_index_offset[1] > 12) {
862  ret = AVERROR_INVALIDDATA;
863  goto fail;
864  }
865  } else {
867  }
868 
869  build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
870  sps->bit_depth_luma);
871  build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
872  sps->bit_depth_luma);
873 
874  init_dequant_tables(pps, sps);
875 
876  if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
877  pps->chroma_qp_diff = 1;
878 
879  if (avctx->debug & FF_DEBUG_PICT_INFO) {
880  av_log(avctx, AV_LOG_DEBUG,
881  "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
882  pps_id, pps->sps_id,
883  pps->cabac ? "CABAC" : "CAVLC",
884  pps->slice_group_count,
885  pps->ref_count[0], pps->ref_count[1],
886  pps->weighted_pred ? "weighted" : "",
887  pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
888  pps->deblocking_filter_parameters_present ? "LPAR" : "",
889  pps->constrained_intra_pred ? "CONSTR" : "",
890  pps->redundant_pic_cnt_present ? "REDU" : "",
891  pps->transform_8x8_mode ? "8x8DCT" : "");
892  }
893 
894  remove_pps(ps, pps_id);
895  ps->pps_list[pps_id] = pps_buf;
896 
897  return 0;
898 
899 fail:
900  av_buffer_unref(&pps_buf);
901  return ret;
902 }
int chroma_format_idc
Definition: h264_ps.h:48
int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int bit_length)
Decode PPS.
Definition: h264_ps.c:749
static unsigned int show_bits1(GetBitContext *s)
Definition: get_bits.h:533
int video_signal_type_present_flag
Definition: h264_ps.h:74
static void remove_pps(H264ParamSets *s, int id)
Definition: h264_ps.c:88
#define NULL
Definition: coverity.c:32
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static int shift(int a, int b)
Definition: sonic.c:82
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:125
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:607
#define MAX_SPS_COUNT
Definition: h264_ps.h:37
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
static int get_se_golomb(GetBitContext *gb)
read signed exp golomb code.
Definition: golomb.h:241
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
int weighted_bipred_idc
Definition: h264_ps.h:119
int chroma_qp_index_offset[2]
Definition: h264_ps.h:122
AVBufferRef * sps_list[MAX_SPS_COUNT]
Definition: h264_ps.h:144
int scaling_matrix_present
Definition: h264_ps.h:89
uint8_t scaling_matrix4[6][16]
Definition: h264_ps.h:90
#define avpriv_request_sample(...)
void av_log_once(void *avcl, int initial_level, int subsequent_level, int *state, const char *fmt,...)
Definition: log.c:415
Sequence parameter set.
Definition: h264_ps.h:44
int bitstream_restriction_flag
Definition: h264_ps.h:87
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264_ps.h:117
int num
Numerator.
Definition: rational.h:59
const uint8_t * buffer
Definition: get_bits.h:62
Picture parameter set.
Definition: h264_ps.h:111
int frame_mbs_only_flag
Definition: h264_ps.h:62
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
const uint8_t ff_h264_quant_rem6[QP_MAX_NUM+1]
Definition: h264data.c:174
AVBufferRef * sps_ref
Definition: h264_ps.h:139
int chroma_qp_diff
Definition: h264_ps.h:130
uint32_t num_units_in_tick
Definition: h264_ps.h:83
int profile_idc
Definition: h264_ps.h:46
const char * av_color_space_name(enum AVColorSpace space)
Definition: pixdesc.c:2966
int profile_idc
Definition: h264_levels.c:52
unsigned int crop_top
frame_cropping_rect_top_offset
Definition: h264_ps.h:70
int fixed_frame_rate_flag
Definition: h264_ps.h:85
uint8_t scaling_matrix4[6][16]
Definition: h264_ps.h:127
int deblocking_filter_parameters_present
deblocking_filter_parameters_present_flag
Definition: h264_ps.h:123
static const AVRational ff_h264_pixel_aspect[17]
Definition: h264data.h:51
const uint8_t ff_h264_dequant4_coeff_init[6][3]
Definition: h264data.c:152
const PPS * pps
Definition: h264_ps.h:149
uint8_t
int full_range
Definition: h264_ps.h:75
unsigned int crop_left
frame_cropping_rect_left_offset
Definition: h264_ps.h:68
int offset_for_non_ref_pic
Definition: h264_ps.h:54
int gaps_in_frame_num_allowed_flag
Definition: h264_ps.h:58
int bit_depth_chroma
bit_depth_chroma_minus8 + 8
Definition: h264_ps.h:101
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:1612
enum AVColorPrimaries color_primaries
Definition: h264_ps.h:77
static void pps_free(void *opaque, uint8_t *data)
Definition: h264_ps.c:740
int cabac
entropy_coding_mode_flag
Definition: h264_ps.h:113
unsigned int crop_right
frame_cropping_rect_right_offset
Definition: h264_ps.h:69
int overread_warning_printed[2]
Definition: h264_ps.h:152
int level_idc
Definition: h264_levels.c:25
uint32_t(*[6] dequant4_coeff)[16]
Definition: h264_ps.h:136
#define height
#define MAX_PPS_COUNT
Definition: h264_ps.h:38
int transform_bypass
qpprime_y_zero_transform_bypass_flag
Definition: h264_ps.h:49
uint32_t(*[6] dequant8_coeff)[64]
Definition: h264_ps.h:137
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
static const int level_max_dpb_mbs[][2]
Definition: h264_ps.c:69
int redundant_pic_cnt_present
redundant_pic_cnt_present_flag
Definition: h264_ps.h:125
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
ptrdiff_t size
Definition: opengl_enc.c:100
#define av_log(a,...)
#define U(x)
Definition: vp56_arith.h:37
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
H.264 parameter set handling.
int mb_aff
mb_adaptive_frame_field_flag
Definition: h264_ps.h:63
enum AVColorTransferCharacteristic color_trc
Definition: h264_ps.h:78
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
#define AV_CODEC_FLAG2_IGNORE_CROP
Discard cropping information from SPS.
Definition: avcodec.h:371
static int get_ue_golomb(GetBitContext *gb)
Read an unsigned Exp-Golomb code in the range 0 to 8190.
Definition: golomb.h:55
int poc_type
pic_order_cnt_type
Definition: h264_ps.h:51
int constrained_intra_pred
constrained_intra_pred_flag
Definition: h264_ps.h:124
int num_reorder_frames
Definition: h264_ps.h:88
int time_offset_length
Definition: h264_ps.h:95
const uint8_t ff_zigzag_scan[16+1]
Definition: mathtables.c:109
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
int weighted_pred
weighted_pred_flag
Definition: h264_ps.h:118
AVBufferRef * av_buffer_create(uint8_t *data, int size, void(*free)(void *opaque, uint8_t *data), void *opaque, int flags)
Create an AVBuffer from an existing array.
Definition: buffer.c:29
static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps, const PPS *pps, int is_sps, uint8_t(*scaling_matrix4)[16], uint8_t(*scaling_matrix8)[64])
Definition: h264_ps.c:280
#define MIN_LOG2_MAX_FRAME_NUM
Definition: h264_ps.c:38
int residual_color_transform_flag
residual_colour_transform_flag
Definition: h264_ps.h:102
#define FFMAX(a, b)
Definition: common.h:94
#define fail()
Definition: checkasm.h:123
int delta_pic_order_always_zero_flag
Definition: h264_ps.h:53
int offset_for_top_to_bottom_field
Definition: h264_ps.h:55
const char * av_color_primaries_name(enum AVColorPrimaries primaries)
Definition: pixdesc.c:2918
static void remove_sps(H264ParamSets *s, int id)
Definition: h264_ps.c:93
static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
Definition: h264_ps.c:645
int crop
frame_cropping_flag
Definition: h264_ps.h:65
uint8_t scaling_matrix8[6][64]
Definition: h264_ps.h:128
size_t data_size
Definition: h264_ps.h:105
static int decode_vui_parameters(GetBitContext *gb, void *logctx, SPS *sps)
Definition: h264_ps.c:133
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
Definition: imgutils.c:317
int ref_frame_count
num_ref_frames
Definition: h264_ps.h:57
int initial_cpb_removal_delay_length
initial_cpb_removal_delay_length_minus1 + 1
Definition: h264_ps.h:97
uint8_t data[4096]
Definition: h264_ps.h:131
#define FFMIN(a, b)
Definition: common.h:96
int poc_cycle_length
num_ref_frames_in_pic_order_cnt_cycle
Definition: h264_ps.h:56
int colour_description_present_flag
Definition: h264_ps.h:76
AVRational sar
Definition: h264_ps.h:73
#define width
uint8_t chroma_qp_table[2][QP_MAX_NUM+1]
pre-scaled (with chroma_qp_index_offset) version of qp_table
Definition: h264_ps.h:129
#define s(width, name)
Definition: cbs_vp9.c:257
int init_qp
pic_init_qp_minus26 + 26
Definition: h264_ps.h:120
enum AVChromaLocation chroma_location
Definition: h264_ps.h:80
int direct_8x8_inference_flag
Definition: h264_ps.h:64
uint8_t scaling_matrix8[6][64]
Definition: h264_ps.h:91
static int decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size, const uint8_t *jvt_list, const uint8_t *fallback_list)
Definition: h264_ps.c:252
unsigned int sps_id
Definition: h264_ps.h:45
#define FF_ARRAY_ELEMS(a)
if(ret)
static unsigned get_ue_golomb_long(GetBitContext *gb)
Read an unsigned Exp-Golomb code in the range 0 to UINT32_MAX-1.
Definition: golomb.h:106
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
int pic_order_present
pic_order_present_flag
Definition: h264_ps.h:114
static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
Definition: h264_ps.c:726
int timing_info_present_flag
Definition: h264_ps.h:82
static int get_se_golomb_long(GetBitContext *gb)
Definition: golomb.h:296
int vcl_hrd_parameters_present_flag
Definition: h264_ps.h:93
Libavcodec external API header.
#define MAX_DELAYED_PIC_COUNT
Definition: h264dec.h:56
AVBufferRef * pps_list[MAX_PPS_COUNT]
Definition: h264_ps.h:145
static int get_ue_golomb_31(GetBitContext *gb)
read unsigned exp golomb code, constraint to a max of 31.
Definition: golomb.h:122
int debug
debug
Definition: avcodec.h:1611
main external API structure.
Definition: avcodec.h:526
const uint8_t ff_h264_chroma_qp[7][QP_MAX_NUM+1]
Definition: h264data.c:203
int dpb_output_delay_length
dpb_output_delay_length_minus1 + 1
Definition: h264_ps.h:99
uint8_t * data
The data buffer.
Definition: buffer.h:89
int vui_parameters_present_flag
Definition: h264_ps.h:72
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> (&#39;D&#39;<<24) + (&#39;C&#39;<<16) + (&#39;B&#39;<<8) + &#39;A&#39;).
Definition: avcodec.h:551
static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
Definition: h264_ps.c:672
AVBufferRef * av_buffer_allocz(int size)
Same as av_buffer_alloc(), except the returned buffer will be initialized to zero.
Definition: buffer.c:83
int constraint_set_flags
constraint_set[0-3]_flag
Definition: h264_ps.h:103
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
const uint8_t ff_h264_quant_div6[QP_MAX_NUM+1]
Definition: h264data.c:182
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:467
static int FUNC() pps(CodedBitstreamContext *ctx, RWContext *rw, H264RawPPS *current)
int index
Definition: gxfenc.c:89
#define EXTENDED_SAR
Definition: h264_ps.c:40
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
static int FUNC() sps(CodedBitstreamContext *ctx, RWContext *rw, H264RawSPS *current)
#define FF_COMPLIANCE_STRICT
Strictly conform to all the things in the spec no matter what consequences.
Definition: avcodec.h:1591
const SPS * sps
Definition: h264_ps.h:150
static int decode_hrd_parameters(GetBitContext *gb, void *logctx, SPS *sps)
Definition: h264_ps.c:107
unsigned int sps_id
Definition: h264_ps.h:112
int log2_max_poc_lsb
log2_max_pic_order_cnt_lsb_minus4
Definition: h264_ps.h:52
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:546
int size
Size of data in bytes.
Definition: buffer.h:93
uint32_t time_scale
Definition: h264_ps.h:84
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
int transform_8x8_mode
transform_8x8_mode_flag
Definition: h264_ps.h:126
#define SIZE_SPECIFIER
Definition: internal.h:229
int pic_struct_present_flag
Definition: h264_ps.h:94
const uint8_t ff_h264_dequant8_coeff_init[6][6]
Definition: h264data.c:165
#define MAX_LOG2_MAX_FRAME_NUM
Definition: h264_ps.h:39
A reference to a data buffer.
Definition: buffer.h:81
int mb_height
Definition: h264_ps.h:61
int init_qs
pic_init_qs_minus26 + 26
Definition: h264_ps.h:121
common internal api header.
uint8_t data[4096]
Definition: h264_ps.h:104
AVBufferRef * pps_ref
Definition: h264_ps.h:147
int nal_hrd_parameters_present_flag
Definition: h264_ps.h:92
size_t data_size
Definition: h264_ps.h:132
int log2_max_frame_num
log2_max_frame_num_minus4 + 4
Definition: h264_ps.h:50
const char * av_color_transfer_name(enum AVColorTransferCharacteristic transfer)
Definition: pixdesc.c:2942
const uint8_t * buffer_end
Definition: get_bits.h:62
static const uint8_t default_scaling4[2][16]
Definition: h264_ps.c:42
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:93
int den
Denominator.
Definition: rational.h:60
void ff_h264_ps_uninit(H264ParamSets *ps)
Uninit H264 param sets structure.
Definition: h264_ps.c:317
int bit_depth_luma
bit_depth_luma_minus8 + 8
Definition: h264_ps.h:100
int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int ignore_truncation)
Decode SPS.
Definition: h264_ps.c:333
int mb_width
pic_width_in_mbs_minus1 + 1
Definition: h264_ps.h:59
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:613
int slice_group_count
num_slice_groups_minus1 + 1
Definition: h264_ps.h:115
int cpb_cnt
See H.264 E.1.2.
Definition: h264_ps.h:96
uint32_t dequant4_buffer[6][QP_MAX_NUM+1][16]
Definition: h264_ps.h:134
#define av_freep(p)
const SPS * sps
Definition: h264_ps.h:140
int32_t offset_for_ref_frame[256]
Definition: h264_ps.h:86
static const uint8_t default_scaling8[2][64]
Definition: h264_ps.c:49
uint32_t dequant8_buffer[6][QP_MAX_NUM+1][64]
Definition: h264_ps.h:135
int cpb_removal_delay_length
cpb_removal_delay_length_minus1 + 1
Definition: h264_ps.h:98
static void init_dequant_tables(PPS *pps, const SPS *sps)
Definition: h264_ps.c:698
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
#define MKTAG(a, b, c, d)
Definition: common.h:405
unsigned int crop_bottom
frame_cropping_rect_bottom_offset
Definition: h264_ps.h:71
exp golomb vlc stuff
enum AVCodecID id
int level_idc
Definition: h264_ps.h:47
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:1589
static void hsub(htype *dst, const htype *src, int bins)
Definition: vf_median.c:75
int i
Definition: input.c:407
const uint8_t ff_h264_dequant8_coeff_init_scan[16]
Definition: h264data.c:161
static void build_qp_table(PPS *pps, int t, int index, const int depth)
Definition: h264_ps.c:717
int mb_slice_group_map_type
Definition: h264_ps.h:116
enum AVColorSpace colorspace
Definition: h264_ps.h:79