FFmpeg  4.4.5
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 
160  sps->video_signal_type_present_flag = get_bits1(gb);
161  if (sps->video_signal_type_present_flag) {
162  get_bits(gb, 3); /* video_format */
163  sps->full_range = get_bits1(gb); /* video_full_range_flag */
164 
165  sps->colour_description_present_flag = get_bits1(gb);
166  if (sps->colour_description_present_flag) {
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"
172  if (!av_color_primaries_name(sps->color_primaries))
173  sps->color_primaries = AVCOL_PRI_UNSPECIFIED;
174  if (!av_color_transfer_name(sps->color_trc))
175  sps->color_trc = AVCOL_TRC_UNSPECIFIED;
176  if (!av_color_space_name(sps->colorspace))
177  sps->colorspace = AVCOL_SPC_UNSPECIFIED;
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
187  sps->chroma_location = AVCHROMA_LOC_LEFT;
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 
194  sps->timing_info_present_flag = get_bits1(gb);
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 
210  sps->nal_hrd_parameters_present_flag = get_bits1(gb);
211  if (sps->nal_hrd_parameters_present_flag)
212  if (decode_hrd_parameters(gb, logctx, sps) < 0)
213  return AVERROR_INVALIDDATA;
214  sps->vcl_hrd_parameters_present_flag = get_bits1(gb);
215  if (sps->vcl_hrd_parameters_present_flag)
216  if (decode_hrd_parameters(gb, logctx, sps) < 0)
217  return AVERROR_INVALIDDATA;
218  if (sps->nal_hrd_parameters_present_flag ||
219  sps->vcl_hrd_parameters_present_flag)
220  get_bits1(gb); /* low_delay_hrd_flag */
221  sps->pic_struct_present_flag = get_bits1(gb);
222  if (!get_bits_left(gb))
223  return 0;
224  sps->bitstream_restriction_flag = get_bits1(gb);
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 */
231  sps->num_reorder_frames = get_ue_golomb_31(gb);
232  get_ue_golomb_31(gb); /*max_dec_frame_buffering*/
233 
234  if (get_bits_left(gb) < 0) {
235  sps->num_reorder_frames = 0;
236  sps->bitstream_restriction_flag = 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
394  sps->chroma_format_idc = get_ue_golomb_31(gb);
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) {
400  sps->residual_color_transform_flag = get_bits1(gb);
401  if (sps->residual_color_transform_flag) {
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
451  sps->delta_pic_order_always_zero_flag = get_bits1(gb);
452  sps->offset_for_non_ref_pic = get_se_golomb_long(gb);
453  sps->offset_for_top_to_bottom_field = get_se_golomb_long(gb);
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 >=
466  FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
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++) {
473  sps->offset_for_ref_frame[i] = get_se_golomb_long(gb);
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 
485  sps->ref_frame_count = get_ue_golomb_31(gb);
486  if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
487  sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
488  if (sps->ref_frame_count > MAX_DELAYED_PIC_COUNT) {
489  av_log(avctx, AV_LOG_ERROR,
490  "too many reference frames %d\n", sps->ref_frame_count);
491  goto fail;
492  }
493  sps->gaps_in_frame_num_allowed_flag = get_bits1(gb);
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 
518  sps->direct_8x8_inference_flag = get_bits1(gb);
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 
574  sps->vui_parameters_present_flag = get_bits1(gb);
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,
583  &ps->overread_warning_printed[sps->vui_parameters_present_flag],
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 &&
592  (sps->ref_frame_count || avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT)) {
593  sps->num_reorder_frames = MAX_DELAYED_PIC_COUNT - 1;
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],
620  sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
621  sps->timing_info_present_flag ? sps->time_scale : 0,
622  sps->bit_depth_luma,
623  sps->bitstream_restriction_flag ? sps->num_reorder_frames : -1
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;
702  memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
703 
704  if (pps->transform_8x8_mode)
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) {
817  pps->mb_slice_group_map_type = get_ue_golomb(gb);
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;
836  pps->chroma_qp_index_offset[0] = get_se_golomb(gb);
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 
842  pps->deblocking_filter_parameters_present = get_bits1(gb);
843  pps->constrained_intra_pred = get_bits1(gb);
844  pps->redundant_pic_cnt_present = get_bits1(gb);
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
860  pps->chroma_qp_index_offset[1] = get_se_golomb(gb);
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 {
866  pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
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 
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 }
uint8_t
Libavcodec external API header.
#define FF_COMPLIANCE_STRICT
Strictly conform to all the things in the spec no matter what consequences.
Definition: avcodec.h:1603
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:1624
static int FUNC() pps(CodedBitstreamContext *ctx, RWContext *rw, H264RawPPS *current)
static int FUNC() sps(CodedBitstreamContext *ctx, RWContext *rw, H264RawSPS *current)
#define s(width, name)
Definition: cbs_vp9.c:257
#define fail()
Definition: checkasm.h:133
#define FFMIN(a, b)
Definition: common.h:105
#define MKTAG(a, b, c, d)
Definition: common.h:478
#define av_clip
Definition: common.h:122
#define FFMAX(a, b)
Definition: common.h:103
#define NULL
Definition: coverity.c:32
enum AVCodecID id
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:546
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:467
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
static unsigned int show_bits1(GetBitContext *s)
Definition: get_bits.h:533
exp golomb vlc stuff
static int get_se_golomb(GetBitContext *gb)
read signed exp golomb code.
Definition: golomb.h:241
static int get_ue_golomb_31(GetBitContext *gb)
read unsigned exp golomb code, constraint to a max of 31.
Definition: golomb.h:122
static int get_ue_golomb(GetBitContext *gb)
Read an unsigned Exp-Golomb code in the range 0 to 8190.
Definition: golomb.h:55
static int get_se_golomb_long(GetBitContext *gb)
Definition: golomb.h:296
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 AV_CODEC_FLAG2_IGNORE_CROP
Discard cropping information from SPS.
Definition: avcodec.h:371
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
AVBufferRef * av_buffer_allocz(buffer_size_t size)
Same as av_buffer_alloc(), except the returned buffer will be initialized to zero.
Definition: buffer.c:83
AVBufferRef * av_buffer_create(uint8_t *data, buffer_size_t size, void(*free)(void *opaque, uint8_t *data), void *opaque, int flags)
Create an AVBuffer from an existing array.
Definition: buffer.c:29
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:93
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
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 index
Definition: gxfenc.c:89
int profile_idc
Definition: h264_levels.c:52
static int decode_hrd_parameters(GetBitContext *gb, void *logctx, SPS *sps)
Definition: h264_ps.c:107
static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
Definition: h264_ps.c:726
static const uint8_t default_scaling4[2][16]
Definition: h264_ps.c:42
#define MIN_LOG2_MAX_FRAME_NUM
Definition: h264_ps.c:38
void ff_h264_ps_uninit(H264ParamSets *ps)
Uninit H264 param sets structure.
Definition: h264_ps.c:317
static void build_qp_table(PPS *pps, int t, int index, const int depth)
Definition: h264_ps.c:717
int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int bit_length)
Decode PPS.
Definition: h264_ps.c:749
static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
Definition: h264_ps.c:645
static void init_dequant_tables(PPS *pps, const SPS *sps)
Definition: h264_ps.c:698
static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
Definition: h264_ps.c:672
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
static void remove_pps(H264ParamSets *s, int id)
Definition: h264_ps.c:88
static const int level_max_dpb_mbs[][2]
Definition: h264_ps.c:69
int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int ignore_truncation)
Decode SPS.
Definition: h264_ps.c:333
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
static int decode_vui_parameters(GetBitContext *gb, void *logctx, SPS *sps)
Definition: h264_ps.c:133
#define EXTENDED_SAR
Definition: h264_ps.c:40
static const uint8_t default_scaling8[2][64]
Definition: h264_ps.c:49
static void pps_free(void *opaque, uint8_t *data)
Definition: h264_ps.c:740
static void remove_sps(H264ParamSets *s, int id)
Definition: h264_ps.c:93
H.264 parameter set handling.
#define MAX_SPS_COUNT
Definition: h264_ps.h:37
#define MAX_PPS_COUNT
Definition: h264_ps.h:38
#define MAX_LOG2_MAX_FRAME_NUM
Definition: h264_ps.h:39
const uint8_t ff_h264_quant_div6[QP_MAX_NUM+1]
Definition: h264data.c:182
const uint8_t ff_h264_quant_rem6[QP_MAX_NUM+1]
Definition: h264data.c:174
const uint8_t ff_h264_dequant4_coeff_init[6][3]
Definition: h264data.c:152
const uint8_t ff_h264_dequant8_coeff_init_scan[16]
Definition: h264data.c:161
const uint8_t ff_h264_chroma_qp[7][QP_MAX_NUM+1]
Definition: h264data.c:203
const uint8_t ff_h264_dequant8_coeff_init[6][6]
Definition: h264data.c:165
static const AVRational ff_h264_pixel_aspect[17]
Definition: h264data.h:51
#define MAX_DELAYED_PIC_COUNT
Definition: h264dec.h:57
misc image utilities
int i
Definition: input.c:407
common internal API header
#define SIZE_SPECIFIER
Definition: internal.h:193
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
void av_log_once(void *avcl, int initial_level, int subsequent_level, int *state, const char *fmt,...)
Definition: log.c:415
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
const uint8_t ff_zigzag_scan[16+1]
Definition: mathtables.c:109
const char data[16]
Definition: mxf.c:142
const char * av_color_transfer_name(enum AVColorTransferCharacteristic transfer)
Definition: pixdesc.c:2940
const char * av_color_space_name(enum AVColorSpace space)
Definition: pixdesc.c:2961
const char * av_color_primaries_name(enum AVColorPrimaries primaries)
Definition: pixdesc.c:2919
@ AVCHROMA_LOC_LEFT
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:607
@ AVCOL_PRI_UNSPECIFIED
Definition: pixfmt.h:461
@ AVCOL_TRC_UNSPECIFIED
Definition: pixfmt.h:486
@ AVCOL_SPC_UNSPECIFIED
Definition: pixfmt.h:515
#define FF_ARRAY_ELEMS(a)
static int shift(int a, int b)
Definition: sonic.c:82
A reference to a data buffer.
Definition: buffer.h:84
int size
Size of data in bytes.
Definition: buffer.h:97
uint8_t * data
The data buffer.
Definition: buffer.h:92
main external API structure.
Definition: avcodec.h:536
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:623
int debug
debug
Definition: avcodec.h:1623
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:561
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:1601
const uint8_t * buffer
Definition: get_bits.h:62
const uint8_t * buffer_end
Definition: get_bits.h:62
const PPS * pps
Definition: h264_ps.h:149
const SPS * sps
Definition: h264_ps.h:150
AVBufferRef * sps_list[MAX_SPS_COUNT]
Definition: h264_ps.h:144
AVBufferRef * pps_ref
Definition: h264_ps.h:147
int overread_warning_printed[2]
Definition: h264_ps.h:152
AVBufferRef * pps_list[MAX_PPS_COUNT]
Definition: h264_ps.h:145
Picture parameter set.
Definition: h264_ps.h:111
Sequence parameter set.
Definition: h264_ps.h:44
#define avpriv_request_sample(...)
#define av_freep(p)
#define av_log(a,...)
int level_idc
Definition: h264_levels.c:25
#define height
#define width
int size
if(ret< 0)
Definition: vf_mcdeint.c:282
static void hsub(htype *dst, const htype *src, int bins)
Definition: vf_median.c:75