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 "mathops.h"
32 #include "avcodec.h"
33 #include "h264data.h"
34 #include "h264_ps.h"
35 #include "golomb.h"
36 
37 #define MIN_LOG2_MAX_FRAME_NUM 4
38 
39 #define EXTENDED_SAR 255
40 
41 static const uint8_t default_scaling4[2][16] = {
42  { 6, 13, 20, 28, 13, 20, 28, 32,
43  20, 28, 32, 37, 28, 32, 37, 42 },
44  { 10, 14, 20, 24, 14, 20, 24, 27,
45  20, 24, 27, 30, 24, 27, 30, 34 }
46 };
47 
48 static const uint8_t default_scaling8[2][64] = {
49  { 6, 10, 13, 16, 18, 23, 25, 27,
50  10, 11, 16, 18, 23, 25, 27, 29,
51  13, 16, 18, 23, 25, 27, 29, 31,
52  16, 18, 23, 25, 27, 29, 31, 33,
53  18, 23, 25, 27, 29, 31, 33, 36,
54  23, 25, 27, 29, 31, 33, 36, 38,
55  25, 27, 29, 31, 33, 36, 38, 40,
56  27, 29, 31, 33, 36, 38, 40, 42 },
57  { 9, 13, 15, 17, 19, 21, 22, 24,
58  13, 13, 17, 19, 21, 22, 24, 25,
59  15, 17, 19, 21, 22, 24, 25, 27,
60  17, 19, 21, 22, 24, 25, 27, 28,
61  19, 21, 22, 24, 25, 27, 28, 30,
62  21, 22, 24, 25, 27, 28, 30, 32,
63  22, 24, 25, 27, 28, 30, 32, 33,
64  24, 25, 27, 28, 30, 32, 33, 35 }
65 };
66 
67 /* maximum number of MBs in the DPB for a given level */
68 static const int level_max_dpb_mbs[][2] = {
69  { 10, 396 },
70  { 11, 900 },
71  { 12, 2376 },
72  { 13, 2376 },
73  { 20, 2376 },
74  { 21, 4752 },
75  { 22, 8100 },
76  { 30, 8100 },
77  { 31, 18000 },
78  { 32, 20480 },
79  { 40, 32768 },
80  { 41, 32768 },
81  { 42, 34816 },
82  { 50, 110400 },
83  { 51, 184320 },
84  { 52, 184320 },
85 };
86 
87 static void remove_pps(H264ParamSets *s, int id)
88 {
89  av_buffer_unref(&s->pps_list[id]);
90 }
91 
92 static void remove_sps(H264ParamSets *s, int id)
93 {
94 #if 0
95  int i;
96  if (s->sps_list[id]) {
97  /* drop all PPS that depend on this SPS */
98  for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
99  if (s->pps_list[i] && ((PPS*)s->pps_list[i]->data)->sps_id == id)
100  remove_pps(s, i);
101  }
102 #endif
103  av_buffer_unref(&s->sps_list[id]);
104 }
105 
106 static inline int decode_hrd_parameters(GetBitContext *gb, void *logctx,
107  SPS *sps)
108 {
109  int cpb_count, i;
110  cpb_count = get_ue_golomb_31(gb) + 1;
111 
112  if (cpb_count > 32U) {
113  av_log(logctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
114  return AVERROR_INVALIDDATA;
115  }
116 
117  get_bits(gb, 4); /* bit_rate_scale */
118  get_bits(gb, 4); /* cpb_size_scale */
119  for (i = 0; i < cpb_count; i++) {
120  get_ue_golomb_long(gb); /* bit_rate_value_minus1 */
121  get_ue_golomb_long(gb); /* cpb_size_value_minus1 */
122  get_bits1(gb); /* cbr_flag */
123  }
124  sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1;
125  sps->cpb_removal_delay_length = get_bits(gb, 5) + 1;
126  sps->dpb_output_delay_length = get_bits(gb, 5) + 1;
127  sps->time_offset_length = get_bits(gb, 5);
128  sps->cpb_cnt = cpb_count;
129  return 0;
130 }
131 
132 static inline int decode_vui_parameters(GetBitContext *gb, void *logctx,
133  SPS *sps)
134 {
135  int aspect_ratio_info_present_flag;
136  unsigned int aspect_ratio_idc;
137 
138  aspect_ratio_info_present_flag = get_bits1(gb);
139 
140  if (aspect_ratio_info_present_flag) {
141  aspect_ratio_idc = get_bits(gb, 8);
142  if (aspect_ratio_idc == EXTENDED_SAR) {
143  sps->sar.num = get_bits(gb, 16);
144  sps->sar.den = get_bits(gb, 16);
145  } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(ff_h264_pixel_aspect)) {
146  sps->sar = ff_h264_pixel_aspect[aspect_ratio_idc];
147  } else {
148  av_log(logctx, AV_LOG_ERROR, "illegal aspect ratio\n");
149  return AVERROR_INVALIDDATA;
150  }
151  } else {
152  sps->sar.num =
153  sps->sar.den = 0;
154  }
155 
156  if (get_bits1(gb)) /* overscan_info_present_flag */
157  get_bits1(gb); /* overscan_appropriate_flag */
158 
159  sps->video_signal_type_present_flag = get_bits1(gb);
160  if (sps->video_signal_type_present_flag) {
161  get_bits(gb, 3); /* video_format */
162  sps->full_range = get_bits1(gb); /* video_full_range_flag */
163 
164  sps->colour_description_present_flag = get_bits1(gb);
165  if (sps->colour_description_present_flag) {
166  sps->color_primaries = get_bits(gb, 8); /* colour_primaries */
167  sps->color_trc = get_bits(gb, 8); /* transfer_characteristics */
168  sps->colorspace = get_bits(gb, 8); /* matrix_coefficients */
169 
170  // Set invalid values to "unspecified"
171  if (!av_color_primaries_name(sps->color_primaries))
172  sps->color_primaries = AVCOL_PRI_UNSPECIFIED;
173  if (!av_color_transfer_name(sps->color_trc))
174  sps->color_trc = AVCOL_TRC_UNSPECIFIED;
175  if (!av_color_space_name(sps->colorspace))
176  sps->colorspace = AVCOL_SPC_UNSPECIFIED;
177  }
178  }
179 
180  /* chroma_location_info_present_flag */
181  if (get_bits1(gb)) {
182  /* chroma_sample_location_type_top_field */
183  sps->chroma_location = get_ue_golomb_31(gb) + 1;
184  get_ue_golomb_31(gb); /* chroma_sample_location_type_bottom_field */
185  } else
186  sps->chroma_location = AVCHROMA_LOC_LEFT;
187 
188  if (show_bits1(gb) && get_bits_left(gb) < 10) {
189  av_log(logctx, AV_LOG_WARNING, "Truncated VUI (%d)\n", get_bits_left(gb));
190  return 0;
191  }
192 
193  sps->timing_info_present_flag = get_bits1(gb);
194  if (sps->timing_info_present_flag) {
195  unsigned num_units_in_tick = get_bits_long(gb, 32);
196  unsigned time_scale = get_bits_long(gb, 32);
197  if (!num_units_in_tick || !time_scale) {
198  av_log(logctx, AV_LOG_ERROR,
199  "time_scale/num_units_in_tick invalid or unsupported (%u/%u)\n",
200  time_scale, num_units_in_tick);
201  sps->timing_info_present_flag = 0;
202  } else {
203  sps->num_units_in_tick = num_units_in_tick;
204  sps->time_scale = time_scale;
205  }
206  sps->fixed_frame_rate_flag = get_bits1(gb);
207  }
208 
209  sps->nal_hrd_parameters_present_flag = get_bits1(gb);
210  if (sps->nal_hrd_parameters_present_flag)
211  if (decode_hrd_parameters(gb, logctx, sps) < 0)
212  return AVERROR_INVALIDDATA;
213  sps->vcl_hrd_parameters_present_flag = get_bits1(gb);
214  if (sps->vcl_hrd_parameters_present_flag)
215  if (decode_hrd_parameters(gb, logctx, sps) < 0)
216  return AVERROR_INVALIDDATA;
217  if (sps->nal_hrd_parameters_present_flag ||
218  sps->vcl_hrd_parameters_present_flag)
219  get_bits1(gb); /* low_delay_hrd_flag */
220  sps->pic_struct_present_flag = get_bits1(gb);
221  if (!get_bits_left(gb))
222  return 0;
223  sps->bitstream_restriction_flag = get_bits1(gb);
224  if (sps->bitstream_restriction_flag) {
225  get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */
226  get_ue_golomb_31(gb); /* max_bytes_per_pic_denom */
227  get_ue_golomb_31(gb); /* max_bits_per_mb_denom */
228  get_ue_golomb_31(gb); /* log2_max_mv_length_horizontal */
229  get_ue_golomb_31(gb); /* log2_max_mv_length_vertical */
230  sps->num_reorder_frames = get_ue_golomb_31(gb);
231  get_ue_golomb_31(gb); /*max_dec_frame_buffering*/
232 
233  if (get_bits_left(gb) < 0) {
234  sps->num_reorder_frames = 0;
235  sps->bitstream_restriction_flag = 0;
236  }
237 
238  if (sps->num_reorder_frames > 16U
239  /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
240  av_log(logctx, AV_LOG_ERROR,
241  "Clipping illegal num_reorder_frames %d\n",
242  sps->num_reorder_frames);
243  sps->num_reorder_frames = 16;
244  return AVERROR_INVALIDDATA;
245  }
246  }
247 
248  return 0;
249 }
250 
251 static int decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
252  const uint8_t *jvt_list,
253  const uint8_t *fallback_list)
254 {
255  int i, last = 8, next = 8;
256  const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
257  if (!get_bits1(gb)) /* matrix not written, we use the predicted one */
258  memcpy(factors, fallback_list, size * sizeof(uint8_t));
259  else
260  for (i = 0; i < size; i++) {
261  if (next) {
262  int v = get_se_golomb(gb);
263  if (v < -128 || v > 127) {
264  av_log(NULL, AV_LOG_ERROR, "delta scale %d is invalid\n", v);
265  return AVERROR_INVALIDDATA;
266  }
267  next = (last + v) & 0xff;
268  }
269  if (!i && !next) { /* matrix not written, we use the preset one */
270  memcpy(factors, jvt_list, size * sizeof(uint8_t));
271  break;
272  }
273  last = factors[scan[i]] = next ? next : last;
274  }
275  return 0;
276 }
277 
278 /* returns non zero if the provided SPS scaling matrix has been filled */
280  const PPS *pps, int is_sps,
281  uint8_t(*scaling_matrix4)[16],
282  uint8_t(*scaling_matrix8)[64])
283 {
284  int fallback_sps = !is_sps && sps->scaling_matrix_present;
285  const uint8_t *fallback[4] = {
286  fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
287  fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
288  fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
289  fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
290  };
291  int ret = 0;
292  if (get_bits1(gb)) {
293  ret |= decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
294  ret |= decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
295  ret |= decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
296  ret |= decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
297  ret |= decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
298  ret |= decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
299  if (is_sps || pps->transform_8x8_mode) {
300  ret |= decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
301  ret |= decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
302  if (sps->chroma_format_idc == 3) {
303  ret |= decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
304  ret |= decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
305  ret |= decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
306  ret |= decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
307  }
308  }
309  if (!ret)
310  ret = is_sps;
311  }
312 
313  return ret;
314 }
315 
317 {
318  int i;
319 
320  for (i = 0; i < MAX_SPS_COUNT; i++)
321  av_buffer_unref(&ps->sps_list[i]);
322 
323  for (i = 0; i < MAX_PPS_COUNT; i++)
324  av_buffer_unref(&ps->pps_list[i]);
325 
326  av_buffer_unref(&ps->pps_ref);
327 
328  ps->pps = NULL;
329  ps->sps = NULL;
330 }
331 
333  H264ParamSets *ps, int ignore_truncation)
334 {
335  AVBufferRef *sps_buf;
336  int profile_idc, level_idc, constraint_set_flags = 0;
337  unsigned int sps_id;
338  int i, log2_max_frame_num_minus4;
339  SPS *sps;
340  int ret;
341 
342  sps_buf = av_buffer_allocz(sizeof(*sps));
343  if (!sps_buf)
344  return AVERROR(ENOMEM);
345  sps = (SPS*)sps_buf->data;
346 
347  sps->data_size = gb->buffer_end - gb->buffer;
348  if (sps->data_size > sizeof(sps->data)) {
349  av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized SPS\n");
350  sps->data_size = sizeof(sps->data);
351  }
352  memcpy(sps->data, gb->buffer, sps->data_size);
353 
354  profile_idc = get_bits(gb, 8);
355  constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
356  constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
357  constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag
358  constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag
359  constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag
360  constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag
361  skip_bits(gb, 2); // reserved_zero_2bits
362  level_idc = get_bits(gb, 8);
363  sps_id = get_ue_golomb_31(gb);
364 
365  if (sps_id >= MAX_SPS_COUNT) {
366  av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
367  goto fail;
368  }
369 
370  sps->sps_id = sps_id;
371  sps->time_offset_length = 24;
372  sps->profile_idc = profile_idc;
373  sps->constraint_set_flags = constraint_set_flags;
374  sps->level_idc = level_idc;
375  sps->full_range = -1;
376 
377  memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
378  memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
379  sps->scaling_matrix_present = 0;
380  sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
381 
382  if (sps->profile_idc == 100 || // High profile
383  sps->profile_idc == 110 || // High10 profile
384  sps->profile_idc == 122 || // High422 profile
385  sps->profile_idc == 244 || // High444 Predictive profile
386  sps->profile_idc == 44 || // Cavlc444 profile
387  sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
388  sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
389  sps->profile_idc == 118 || // Stereo High profile (MVC)
390  sps->profile_idc == 128 || // Multiview High profile (MVC)
391  sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
392  sps->profile_idc == 144) { // old High444 profile
393  sps->chroma_format_idc = get_ue_golomb_31(gb);
394  if (sps->chroma_format_idc > 3U) {
395  avpriv_request_sample(avctx, "chroma_format_idc %u",
396  sps->chroma_format_idc);
397  goto fail;
398  } else if (sps->chroma_format_idc == 3) {
399  sps->residual_color_transform_flag = get_bits1(gb);
400  if (sps->residual_color_transform_flag) {
401  av_log(avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
402  goto fail;
403  }
404  }
405  sps->bit_depth_luma = get_ue_golomb_31(gb) + 8;
406  sps->bit_depth_chroma = get_ue_golomb_31(gb) + 8;
407  if (sps->bit_depth_chroma != sps->bit_depth_luma) {
408  avpriv_request_sample(avctx,
409  "Different chroma and luma bit depth");
410  goto fail;
411  }
412  if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 ||
413  sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
414  av_log(avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
415  sps->bit_depth_luma, sps->bit_depth_chroma);
416  goto fail;
417  }
418  sps->transform_bypass = get_bits1(gb);
420  sps->scaling_matrix4, sps->scaling_matrix8);
421  if (ret < 0)
422  goto fail;
423  sps->scaling_matrix_present |= ret;
424  } else {
425  sps->chroma_format_idc = 1;
426  sps->bit_depth_luma = 8;
427  sps->bit_depth_chroma = 8;
428  }
429 
430  log2_max_frame_num_minus4 = get_ue_golomb_31(gb);
431  if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
432  log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
433  av_log(avctx, AV_LOG_ERROR,
434  "log2_max_frame_num_minus4 out of range (0-12): %d\n",
435  log2_max_frame_num_minus4);
436  goto fail;
437  }
438  sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
439 
440  sps->poc_type = get_ue_golomb_31(gb);
441 
442  if (sps->poc_type == 0) { // FIXME #define
443  unsigned t = get_ue_golomb_31(gb);
444  if (t>12) {
445  av_log(avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
446  goto fail;
447  }
448  sps->log2_max_poc_lsb = t + 4;
449  } else if (sps->poc_type == 1) { // FIXME #define
450  sps->delta_pic_order_always_zero_flag = get_bits1(gb);
451  sps->offset_for_non_ref_pic = get_se_golomb_long(gb);
452  sps->offset_for_top_to_bottom_field = get_se_golomb_long(gb);
453 
454  if ( sps->offset_for_non_ref_pic == INT32_MIN
455  || sps->offset_for_top_to_bottom_field == INT32_MIN
456  ) {
457  av_log(avctx, AV_LOG_ERROR,
458  "offset_for_non_ref_pic or offset_for_top_to_bottom_field is out of range\n");
459  goto fail;
460  }
461 
462  sps->poc_cycle_length = get_ue_golomb(gb);
463 
464  if ((unsigned)sps->poc_cycle_length >=
465  FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
466  av_log(avctx, AV_LOG_ERROR,
467  "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
468  goto fail;
469  }
470 
471  for (i = 0; i < sps->poc_cycle_length; i++) {
472  sps->offset_for_ref_frame[i] = get_se_golomb_long(gb);
473  if (sps->offset_for_ref_frame[i] == INT32_MIN) {
474  av_log(avctx, AV_LOG_ERROR,
475  "offset_for_ref_frame is out of range\n");
476  goto fail;
477  }
478  }
479  } else if (sps->poc_type != 2) {
480  av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
481  goto fail;
482  }
483 
484  sps->ref_frame_count = get_ue_golomb_31(gb);
485  if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
486  sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
487  if (sps->ref_frame_count > H264_MAX_DPB_FRAMES) {
488  av_log(avctx, AV_LOG_ERROR,
489  "too many reference frames %d\n", sps->ref_frame_count);
490  goto fail;
491  }
492  sps->gaps_in_frame_num_allowed_flag = get_bits1(gb);
493  sps->mb_width = get_ue_golomb(gb) + 1;
494  sps->mb_height = get_ue_golomb(gb) + 1;
495 
496  sps->frame_mbs_only_flag = get_bits1(gb);
497 
498  if (sps->mb_height >= INT_MAX / 2U) {
499  av_log(avctx, AV_LOG_ERROR, "height overflow\n");
500  goto fail;
501  }
502  sps->mb_height *= 2 - sps->frame_mbs_only_flag;
503 
504  if (!sps->frame_mbs_only_flag)
505  sps->mb_aff = get_bits1(gb);
506  else
507  sps->mb_aff = 0;
508 
509  if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
510  (unsigned)sps->mb_height >= INT_MAX / 16 ||
511  av_image_check_size(16 * sps->mb_width,
512  16 * sps->mb_height, 0, avctx)) {
513  av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
514  goto fail;
515  }
516 
517  sps->direct_8x8_inference_flag = get_bits1(gb);
518 
519  sps->crop = get_bits1(gb);
520  if (sps->crop) {
521  unsigned int crop_left = get_ue_golomb(gb);
522  unsigned int crop_right = get_ue_golomb(gb);
523  unsigned int crop_top = get_ue_golomb(gb);
524  unsigned int crop_bottom = get_ue_golomb(gb);
525  int width = 16 * sps->mb_width;
526  int height = 16 * sps->mb_height;
527 
528  if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
529  av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
530  "values are l:%d r:%d t:%d b:%d\n",
531  crop_left, crop_right, crop_top, crop_bottom);
532 
533  sps->crop_left =
534  sps->crop_right =
535  sps->crop_top =
536  sps->crop_bottom = 0;
537  } else {
538  int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
539  int hsub = (sps->chroma_format_idc == 1 ||
540  sps->chroma_format_idc == 2) ? 1 : 0;
541  int step_x = 1 << hsub;
542  int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
543 
544  if (crop_left > (unsigned)INT_MAX / 4 / step_x ||
545  crop_right > (unsigned)INT_MAX / 4 / step_x ||
546  crop_top > (unsigned)INT_MAX / 4 / step_y ||
547  crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
548  (crop_left + crop_right ) * step_x >= width ||
549  (crop_top + crop_bottom) * step_y >= height
550  ) {
551  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);
552  goto fail;
553  }
554 
555  sps->crop_left = crop_left * step_x;
556  sps->crop_right = crop_right * step_x;
557  sps->crop_top = crop_top * step_y;
558  sps->crop_bottom = crop_bottom * step_y;
559  }
560  } else {
561  sps->crop_left =
562  sps->crop_right =
563  sps->crop_top =
564  sps->crop_bottom =
565  sps->crop = 0;
566  }
567 
568  sps->vui_parameters_present_flag = get_bits1(gb);
569  if (sps->vui_parameters_present_flag) {
570  int ret = decode_vui_parameters(gb, avctx, sps);
571  if (ret < 0)
572  goto fail;
573  }
574 
575  if (get_bits_left(gb) < 0) {
576  av_log_once(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR, AV_LOG_DEBUG,
577  &ps->overread_warning_printed[sps->vui_parameters_present_flag],
578  "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
579  if (!ignore_truncation)
580  goto fail;
581  }
582 
583  /* if the maximum delay is not stored in the SPS, derive it based on the
584  * level */
585  if (!sps->bitstream_restriction_flag &&
586  (sps->ref_frame_count || avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT)) {
587  sps->num_reorder_frames = H264_MAX_DPB_FRAMES - 1;
588  for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
589  if (level_max_dpb_mbs[i][0] == sps->level_idc) {
590  sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
591  sps->num_reorder_frames);
592  break;
593  }
594  }
595  }
596 
597  if (!sps->sar.den)
598  sps->sar.den = 1;
599 
600  if (avctx->debug & FF_DEBUG_PICT_INFO) {
601  static const char csp[4][5] = { "Gray", "420", "422", "444" };
602  av_log(avctx, AV_LOG_DEBUG,
603  "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",
604  sps_id, sps->profile_idc, sps->level_idc,
605  sps->poc_type,
606  sps->ref_frame_count,
607  sps->mb_width, sps->mb_height,
608  sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
609  sps->direct_8x8_inference_flag ? "8B8" : "",
610  sps->crop_left, sps->crop_right,
611  sps->crop_top, sps->crop_bottom,
612  sps->vui_parameters_present_flag ? "VUI" : "",
613  csp[sps->chroma_format_idc],
614  sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
615  sps->timing_info_present_flag ? sps->time_scale : 0,
616  sps->bit_depth_luma,
617  sps->bitstream_restriction_flag ? sps->num_reorder_frames : -1
618  );
619  }
620 
621  /* check if this is a repeat of an already parsed SPS, then keep the
622  * original one.
623  * otherwise drop all PPSes that depend on it */
624  if (ps->sps_list[sps_id] &&
625  !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
626  av_buffer_unref(&sps_buf);
627  } else {
628  remove_sps(ps, sps_id);
629  ps->sps_list[sps_id] = sps_buf;
630  }
631 
632  return 0;
633 
634 fail:
635  av_buffer_unref(&sps_buf);
636  return AVERROR_INVALIDDATA;
637 }
638 
639 static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
640 {
641  int i, j, q, x;
642  const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
643 
644  for (i = 0; i < 6; i++) {
645  pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
646  for (j = 0; j < i; j++)
647  if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
648  64 * sizeof(uint8_t))) {
649  pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
650  break;
651  }
652  if (j < i)
653  continue;
654 
655  for (q = 0; q < max_qp + 1; q++) {
656  int shift = ff_h264_quant_div6[q];
657  int idx = ff_h264_quant_rem6[q];
658  for (x = 0; x < 64; x++)
659  pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
660  ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
661  pps->scaling_matrix8[i][x]) << shift;
662  }
663  }
664 }
665 
666 static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
667 {
668  int i, j, q, x;
669  const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
670  for (i = 0; i < 6; i++) {
671  pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
672  for (j = 0; j < i; j++)
673  if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
674  16 * sizeof(uint8_t))) {
675  pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
676  break;
677  }
678  if (j < i)
679  continue;
680 
681  for (q = 0; q < max_qp + 1; q++) {
682  int shift = ff_h264_quant_div6[q] + 2;
683  int idx = ff_h264_quant_rem6[q];
684  for (x = 0; x < 16; x++)
685  pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
686  ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
687  pps->scaling_matrix4[i][x]) << shift;
688  }
689  }
690 }
691 
692 static void init_dequant_tables(PPS *pps, const SPS *sps)
693 {
694  int i, x;
696  memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
697 
698  if (pps->transform_8x8_mode)
700  if (sps->transform_bypass) {
701  for (i = 0; i < 6; i++)
702  for (x = 0; x < 16; x++)
703  pps->dequant4_coeff[i][0][x] = 1 << 6;
704  if (pps->transform_8x8_mode)
705  for (i = 0; i < 6; i++)
706  for (x = 0; x < 64; x++)
707  pps->dequant8_coeff[i][0][x] = 1 << 6;
708  }
709 }
710 
711 static void build_qp_table(PPS *pps, int t, int index, const int depth)
712 {
713  int i;
714  const int max_qp = 51 + 6 * (depth - 8);
715  for (i = 0; i < max_qp + 1; i++)
716  pps->chroma_qp_table[t][i] =
717  ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
718 }
719 
720 static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
721 {
722  int profile_idc = sps->profile_idc;
723 
724  if ((profile_idc == 66 || profile_idc == 77 ||
725  profile_idc == 88) && (sps->constraint_set_flags & 7)) {
726  av_log(logctx, AV_LOG_VERBOSE,
727  "Current profile doesn't provide more RBSP data in PPS, skipping\n");
728  return 0;
729  }
730 
731  return 1;
732 }
733 
734 static void pps_free(void *opaque, uint8_t *data)
735 {
736  PPS *pps = (PPS*)data;
737 
738  av_buffer_unref(&pps->sps_ref);
739 
740  av_freep(&data);
741 }
742 
744  H264ParamSets *ps, int bit_length)
745 {
746  AVBufferRef *pps_buf;
747  const SPS *sps;
748  unsigned int pps_id = get_ue_golomb(gb);
749  PPS *pps;
750  int qp_bd_offset;
751  int bits_left;
752  int ret;
753 
754  if (pps_id >= MAX_PPS_COUNT) {
755  av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
756  return AVERROR_INVALIDDATA;
757  }
758 
759  pps = av_mallocz(sizeof(*pps));
760  if (!pps)
761  return AVERROR(ENOMEM);
762  pps_buf = av_buffer_create((uint8_t*)pps, sizeof(*pps),
763  pps_free, NULL, 0);
764  if (!pps_buf) {
765  av_freep(&pps);
766  return AVERROR(ENOMEM);
767  }
768 
769  pps->data_size = gb->buffer_end - gb->buffer;
770  if (pps->data_size > sizeof(pps->data)) {
771  av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized PPS "
772  "(%"SIZE_SPECIFIER" > %"SIZE_SPECIFIER")\n",
773  pps->data_size, sizeof(pps->data));
774  pps->data_size = sizeof(pps->data);
775  }
776  memcpy(pps->data, gb->buffer, pps->data_size);
777 
778  pps->sps_id = get_ue_golomb_31(gb);
779  if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
780  !ps->sps_list[pps->sps_id]) {
781  av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
783  goto fail;
784  }
785  pps->sps_ref = av_buffer_ref(ps->sps_list[pps->sps_id]);
786  if (!pps->sps_ref) {
787  ret = AVERROR(ENOMEM);
788  goto fail;
789  }
790  pps->sps = (const SPS*)pps->sps_ref->data;
791  sps = pps->sps;
792 
793  if (sps->bit_depth_luma > 14) {
794  av_log(avctx, AV_LOG_ERROR,
795  "Invalid luma bit depth=%d\n",
796  sps->bit_depth_luma);
798  goto fail;
799  } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
801  "Unimplemented luma bit depth=%d",
802  sps->bit_depth_luma);
804  goto fail;
805  }
806 
807  pps->cabac = get_bits1(gb);
808  pps->pic_order_present = get_bits1(gb);
809  pps->slice_group_count = get_ue_golomb(gb) + 1;
810  if (pps->slice_group_count > 1) {
811  pps->mb_slice_group_map_type = get_ue_golomb(gb);
812  avpriv_report_missing_feature(avctx, "FMO");
814  goto fail;
815  }
816  pps->ref_count[0] = get_ue_golomb(gb) + 1;
817  pps->ref_count[1] = get_ue_golomb(gb) + 1;
818  if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
819  av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
821  goto fail;
822  }
823 
824  qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
825 
826  pps->weighted_pred = get_bits1(gb);
827  pps->weighted_bipred_idc = get_bits(gb, 2);
828  pps->init_qp = get_se_golomb(gb) + 26U + qp_bd_offset;
829  pps->init_qs = get_se_golomb(gb) + 26U + qp_bd_offset;
830  pps->chroma_qp_index_offset[0] = get_se_golomb(gb);
831  if (pps->chroma_qp_index_offset[0] < -12 || pps->chroma_qp_index_offset[0] > 12) {
833  goto fail;
834  }
835 
836  pps->deblocking_filter_parameters_present = get_bits1(gb);
837  pps->constrained_intra_pred = get_bits1(gb);
838  pps->redundant_pic_cnt_present = get_bits1(gb);
839 
840  pps->transform_8x8_mode = 0;
841  memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
842  sizeof(pps->scaling_matrix4));
843  memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
844  sizeof(pps->scaling_matrix8));
845 
846  bits_left = bit_length - get_bits_count(gb);
847  if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
848  pps->transform_8x8_mode = get_bits1(gb);
850  pps->scaling_matrix4, pps->scaling_matrix8);
851  if (ret < 0)
852  goto fail;
853  // second_chroma_qp_index_offset
854  pps->chroma_qp_index_offset[1] = get_se_golomb(gb);
855  if (pps->chroma_qp_index_offset[1] < -12 || pps->chroma_qp_index_offset[1] > 12) {
857  goto fail;
858  }
859  } else {
860  pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
861  }
862 
863  build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
864  sps->bit_depth_luma);
865  build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
866  sps->bit_depth_luma);
867 
869 
870  if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
871  pps->chroma_qp_diff = 1;
872 
873  if (avctx->debug & FF_DEBUG_PICT_INFO) {
874  av_log(avctx, AV_LOG_DEBUG,
875  "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
876  pps_id, pps->sps_id,
877  pps->cabac ? "CABAC" : "CAVLC",
878  pps->slice_group_count,
879  pps->ref_count[0], pps->ref_count[1],
880  pps->weighted_pred ? "weighted" : "",
881  pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
882  pps->deblocking_filter_parameters_present ? "LPAR" : "",
883  pps->constrained_intra_pred ? "CONSTR" : "",
884  pps->redundant_pic_cnt_present ? "REDU" : "",
885  pps->transform_8x8_mode ? "8x8DCT" : "");
886  }
887 
888  remove_pps(ps, pps_id);
889  ps->pps_list[pps_id] = pps_buf;
890 
891  return 0;
892 
893 fail:
894  av_buffer_unref(&pps_buf);
895  return ret;
896 }
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
H264ParamSets::sps
const SPS * sps
Definition: h264_ps.h:150
av_clip
#define av_clip
Definition: common.h:95
show_bits1
static unsigned int show_bits1(GetBitContext *s)
Definition: get_bits.h:534
get_bits_left
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:850
AVERROR
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
ff_h264_ps_uninit
void ff_h264_ps_uninit(H264ParamSets *ps)
Uninit H264 param sets structure.
Definition: h264_ps.c:316
pps_free
static void pps_free(void *opaque, uint8_t *data)
Definition: h264_ps.c:734
get_se_golomb_long
static int get_se_golomb_long(GetBitContext *gb)
Definition: golomb.h:294
AVBufferRef::data
uint8_t * data
The data buffer.
Definition: buffer.h:90
get_bits_long
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:547
ff_h264_chroma_qp
const uint8_t ff_h264_chroma_qp[7][QP_MAX_NUM+1]
Definition: h264data.c:203
get_bits_count
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:220
get_ue_golomb
static int get_ue_golomb(GetBitContext *gb)
Read an unsigned Exp-Golomb code in the range 0 to 8190.
Definition: golomb.h:53
level_idc
int level_idc
Definition: h264_levels.c:25
AVCOL_TRC_UNSPECIFIED
@ AVCOL_TRC_UNSPECIFIED
Definition: pixfmt.h:499
data
const char data[16]
Definition: mxf.c:143
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
init_dequant_tables
static void init_dequant_tables(PPS *pps, const SPS *sps)
Definition: h264_ps.c:692
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
av_buffer_ref
AVBufferRef * av_buffer_ref(const AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:103
FF_DEBUG_PICT_INFO
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:1323
AV_CODEC_FLAG2_IGNORE_CROP
#define AV_CODEC_FLAG2_IGNORE_CROP
Discard cropping information from SPS.
Definition: avcodec.h:316
hsub
static void hsub(htype *dst, const htype *src, int bins)
Definition: vf_median.c:74
ff_h264_decode_picture_parameter_set
int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int bit_length)
Decode PPS.
Definition: h264_ps.c:743
skip_bits
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:468
golomb.h
exp golomb vlc stuff
remove_pps
static void remove_pps(H264ParamSets *s, int id)
Definition: h264_ps.c:87
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:380
av_color_space_name
const char * av_color_space_name(enum AVColorSpace space)
Definition: pixdesc.c:3050
U
#define U(x)
Definition: vp56_arith.h:37
fail
#define fail()
Definition: checkasm.h:130
GetBitContext
Definition: get_bits.h:62
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
width
#define width
s
#define s(width, name)
Definition: cbs_vp9.c:256
H264ParamSets::overread_warning_printed
int overread_warning_printed[2]
Definition: h264_ps.h:152
h264data.h
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
H264ParamSets::sps_list
AVBufferRef * sps_list[MAX_SPS_COUNT]
Definition: h264_ps.h:144
AVCOL_PRI_UNSPECIFIED
@ AVCOL_PRI_UNSPECIFIED
Definition: pixfmt.h:474
get_se_golomb
static int get_se_golomb(GetBitContext *gb)
read signed exp golomb code.
Definition: golomb.h:239
decode_scaling_list
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:251
if
if(ret)
Definition: filter_design.txt:179
GetBitContext::buffer
const uint8_t * buffer
Definition: get_bits.h:63
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
av_buffer_unref
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:139
AVCHROMA_LOC_LEFT
@ AVCHROMA_LOC_LEFT
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:620
profile_idc
int profile_idc
Definition: h264_levels.c:53
more_rbsp_data_in_pps
static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
Definition: h264_ps.c:720
ff_h264_dequant8_coeff_init_scan
const uint8_t ff_h264_dequant8_coeff_init_scan[16]
Definition: h264data.c:161
SPS
Sequence parameter set.
Definition: h264_ps.h:44
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:499
PPS
Picture parameter set.
Definition: h264_ps.h:111
mathops.h
av_color_primaries_name
const char * av_color_primaries_name(enum AVColorPrimaries primaries)
Definition: pixdesc.c:3008
MAX_PPS_COUNT
#define MAX_PPS_COUNT
Definition: h264_ps.h:38
level_max_dpb_mbs
static const int level_max_dpb_mbs[][2]
Definition: h264_ps.c:68
h264_ps.h
index
int index
Definition: gxfenc.c:89
decode_hrd_parameters
static int decode_hrd_parameters(GetBitContext *gb, void *logctx, SPS *sps)
Definition: h264_ps.c:106
av_buffer_create
AVBufferRef * av_buffer_create(uint8_t *data, size_t size, void(*free)(void *opaque, uint8_t *data), void *opaque, int flags)
Create an AVBuffer from an existing array.
Definition: buffer.c:55
AVCodecContext::flags2
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:476
ff_zigzag_scan
const uint8_t ff_zigzag_scan[16+1]
Definition: mathtables.c:109
EXTENDED_SAR
#define EXTENDED_SAR
Definition: h264_ps.c:39
id
enum AVCodecID id
Definition: extract_extradata_bsf.c:324
ff_h264_dequant8_coeff_init
const uint8_t ff_h264_dequant8_coeff_init[6][6]
Definition: h264data.c:165
pps
static int FUNC() pps(CodedBitstreamContext *ctx, RWContext *rw, H264RawPPS *current)
Definition: cbs_h264_syntax_template.c:404
FF_COMPLIANCE_STRICT
#define FF_COMPLIANCE_STRICT
Strictly conform to all the things in the spec no matter what consequences.
Definition: avcodec.h:1302
size
int size
Definition: twinvq_data.h:10344
avpriv_report_missing_feature
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
remove_sps
static void remove_sps(H264ParamSets *s, int id)
Definition: h264_ps.c:92
init_dequant8_coeff_table
static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
Definition: h264_ps.c:639
MAX_LOG2_MAX_FRAME_NUM
#define MAX_LOG2_MAX_FRAME_NUM
Definition: h264_ps.h:39
height
#define height
ff_h264_quant_rem6
const uint8_t ff_h264_quant_rem6[QP_MAX_NUM+1]
Definition: h264data.c:174
decode_vui_parameters
static int decode_vui_parameters(GetBitContext *gb, void *logctx, SPS *sps)
Definition: h264_ps.c:132
decode_scaling_matrices
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:279
MIN_LOG2_MAX_FRAME_NUM
#define MIN_LOG2_MAX_FRAME_NUM
Definition: h264_ps.c:37
AVBufferRef::size
size_t size
Size of data in bytes.
Definition: buffer.h:94
ff_h264_pixel_aspect
static const AVRational ff_h264_pixel_aspect[17]
Definition: h264data.h:52
default_scaling4
static const uint8_t default_scaling4[2][16]
Definition: h264_ps.c:41
ff_h264_decode_seq_parameter_set
int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int ignore_truncation)
Decode SPS.
Definition: h264_ps.c:332
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:264
AVCOL_SPC_UNSPECIFIED
@ AVCOL_SPC_UNSPECIFIED
Definition: pixfmt.h:528
GetBitContext::buffer_end
const uint8_t * buffer_end
Definition: get_bits.h:63
avcodec.h
ff_zigzag_direct
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
av_buffer_allocz
AVBufferRef * av_buffer_allocz(size_t size)
Same as av_buffer_alloc(), except the returned buffer will be initialized to zero.
Definition: buffer.c:93
ret
ret
Definition: filter_design.txt:187
AVCodecContext::strict_std_compliance
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:1300
sps
static int FUNC() sps(CodedBitstreamContext *ctx, RWContext *rw, H264RawSPS *current)
Definition: cbs_h264_syntax_template.c:260
default_scaling8
static const uint8_t default_scaling8[2][64]
Definition: h264_ps.c:48
build_qp_table
static void build_qp_table(PPS *pps, int t, int index, const int depth)
Definition: h264_ps.c:711
SIZE_SPECIFIER
#define SIZE_SPECIFIER
Definition: internal.h:192
AVCodecContext
main external API structure.
Definition: avcodec.h:389
ff_h264_dequant4_coeff_init
const uint8_t ff_h264_dequant4_coeff_init[6][3]
Definition: h264data.c:152
get_ue_golomb_31
static int get_ue_golomb_31(GetBitContext *gb)
read unsigned exp golomb code, constraint to a max of 31.
Definition: golomb.h:120
H264ParamSets::pps_list
AVBufferRef * pps_list[MAX_PPS_COUNT]
Definition: h264_ps.h:145
H264ParamSets
Definition: h264_ps.h:143
MAX_SPS_COUNT
#define MAX_SPS_COUNT
Definition: h264_ps.h:37
ff_h264_quant_div6
const uint8_t ff_h264_quant_div6[QP_MAX_NUM+1]
Definition: h264data.c:182
AVCodecContext::debug
int debug
debug
Definition: avcodec.h:1322
H264_MAX_DPB_FRAMES
@ H264_MAX_DPB_FRAMES
Definition: h264.h:76
av_log_once
void av_log_once(void *avcl, int initial_level, int subsequent_level, int *state, const char *fmt,...)
Definition: log.c:417
shift
static int shift(int a, int b)
Definition: sonic.c:88
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:82
get_ue_golomb_long
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:104
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
init_dequant4_coeff_table
static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
Definition: h264_ps.c:666
AVCodecContext::codec_tag
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:414
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
imgutils.h
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
MKTAG
#define MKTAG(a, b, c, d)
Definition: macros.h:55
H264ParamSets::pps
const PPS * pps
Definition: h264_ps.h:149
av_image_check_size
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:318
av_color_transfer_name
const char * av_color_transfer_name(enum AVColorTransferCharacteristic transfer)
Definition: pixdesc.c:3029
H264ParamSets::pps_ref
AVBufferRef * pps_ref
Definition: h264_ps.h:147