FFmpeg: libavcodec/h264_ps.c Source File

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 MAX_LOG2_MAX_FRAME_NUM (12 + 4)
39  #define MIN_LOG2_MAX_FRAME_NUM 4
40 
41  #define EXTENDED_SAR 255
42 
43  static const uint8_t default_scaling4[2][16] = {
44  { 6, 13, 20, 28, 13, 20, 28, 32,
45  20, 28, 32, 37, 28, 32, 37, 42 },
46  { 10, 14, 20, 24, 14, 20, 24, 27,
47  20, 24, 27, 30, 24, 27, 30, 34 }
48 };
49 
50  static const uint8_t default_scaling8[2][64] = {
51  { 6, 10, 13, 16, 18, 23, 25, 27,
52  10, 11, 16, 18, 23, 25, 27, 29,
53  13, 16, 18, 23, 25, 27, 29, 31,
54  16, 18, 23, 25, 27, 29, 31, 33,
55  18, 23, 25, 27, 29, 31, 33, 36,
56  23, 25, 27, 29, 31, 33, 36, 38,
57  25, 27, 29, 31, 33, 36, 38, 40,
58  27, 29, 31, 33, 36, 38, 40, 42 },
59  { 9, 13, 15, 17, 19, 21, 22, 24,
60  13, 13, 17, 19, 21, 22, 24, 25,
61  15, 17, 19, 21, 22, 24, 25, 27,
62  17, 19, 21, 22, 24, 25, 27, 28,
63  19, 21, 22, 24, 25, 27, 28, 30,
64  21, 22, 24, 25, 27, 28, 30, 32,
65  22, 24, 25, 27, 28, 30, 32, 33,
66  24, 25, 27, 28, 30, 32, 33, 35 }
67 };
68 
69 /* maximum number of MBs in the DPB for a given level */
70  static const int level_max_dpb_mbs[][2] = {
71  { 10, 396 },
72  { 11, 900 },
73  { 12, 2376 },
74  { 13, 2376 },
75  { 20, 2376 },
76  { 21, 4752 },
77  { 22, 8100 },
78  { 30, 8100 },
79  { 31, 18000 },
80  { 32, 20480 },
81  { 40, 32768 },
82  { 41, 32768 },
83  { 42, 34816 },
84  { 50, 110400 },
85  { 51, 184320 },
86  { 52, 184320 },
87 };
88 
89  static void remove_pps(H264ParamSets *s, int id)
90 {
91  av_buffer_unref(&s->pps_list[id]);
92 }
93 
94  static void remove_sps(H264ParamSets *s, int id)
95 {
96 #if 0
97  int i;
98  if (s->sps_list[id]) {
99  /* drop all PPS that depend on this SPS */
100  for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
101  if (s->pps_list[i] && ((PPS*)s->pps_list[i]->data)->sps_id == id)
102  remove_pps(s, i);
103  }
104 #endif
105  av_buffer_unref(&s->sps_list[id]);
106 }
107 
108  static inline int decode_hrd_parameters(GetBitContext *gb, AVCodecContext *avctx,
109  SPS *sps)
110 {
111  int cpb_count, i;
112  cpb_count = get_ue_golomb_31(gb) + 1;
113 
114  if (cpb_count > 32U) {
115  av_log(avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
116  return AVERROR_INVALIDDATA;
117  }
118 
119  get_bits(gb, 4); /* bit_rate_scale */
120  get_bits(gb, 4); /* cpb_size_scale */
121  for (i = 0; i < cpb_count; i++) {
122  get_ue_golomb_long(gb); /* bit_rate_value_minus1 */
123  get_ue_golomb_long(gb); /* cpb_size_value_minus1 */
124  get_bits1(gb); /* cbr_flag */
125  }
126  sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1;
127  sps->cpb_removal_delay_length = get_bits(gb, 5) + 1;
128  sps->dpb_output_delay_length = get_bits(gb, 5) + 1;
129  sps->time_offset_length = get_bits(gb, 5);
130  sps->cpb_cnt = cpb_count;
131  return 0;
132 }
133 
134  static inline int decode_vui_parameters(GetBitContext *gb, AVCodecContext *avctx,
135  SPS *sps)
136 {
137  int aspect_ratio_info_present_flag;
138  unsigned int aspect_ratio_idc;
139 
140  aspect_ratio_info_present_flag = get_bits1(gb);
141 
142  if (aspect_ratio_info_present_flag) {
143  aspect_ratio_idc = get_bits(gb, 8);
144  if (aspect_ratio_idc == EXTENDED_SAR) {
145  sps->sar.num = get_bits(gb, 16);
146  sps->sar.den = get_bits(gb, 16);
147  } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(ff_h264_pixel_aspect)) {
148  sps->sar = ff_h264_pixel_aspect[aspect_ratio_idc];
149  } else {
150  av_log(avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
151  return AVERROR_INVALIDDATA;
152  }
153  } else {
154  sps->sar.num =
155  sps->sar.den = 0;
156  }
157 
158  if (get_bits1(gb)) /* overscan_info_present_flag */
159  get_bits1(gb); /* overscan_appropriate_flag */
160 
161  sps->video_signal_type_present_flag = get_bits1(gb);
162  if (sps->video_signal_type_present_flag) {
163  get_bits(gb, 3); /* video_format */
164  sps->full_range = get_bits1(gb); /* video_full_range_flag */
165 
166  sps->colour_description_present_flag = get_bits1(gb);
167  if (sps->colour_description_present_flag) {
168  sps->color_primaries = get_bits(gb, 8); /* colour_primaries */
169  sps->color_trc = get_bits(gb, 8); /* transfer_characteristics */
170  sps->colorspace = get_bits(gb, 8); /* matrix_coefficients */
171 
172  // Set invalid values to "unspecified"
173  if (!av_color_primaries_name(sps->color_primaries))
174  sps->color_primaries = AVCOL_PRI_UNSPECIFIED;
175  if (!av_color_transfer_name(sps->color_trc))
176  sps->color_trc = AVCOL_TRC_UNSPECIFIED;
177  if (!av_color_space_name(sps->colorspace))
178  sps->colorspace = AVCOL_SPC_UNSPECIFIED;
179  }
180  }
181 
182  /* chroma_location_info_present_flag */
183  if (get_bits1(gb)) {
184  /* chroma_sample_location_type_top_field */
185  avctx->chroma_sample_location = get_ue_golomb(gb) + 1;
186  get_ue_golomb(gb); /* chroma_sample_location_type_bottom_field */
187  }
188 
189  if (show_bits1(gb) && get_bits_left(gb) < 10) {
190  av_log(avctx, AV_LOG_WARNING, "Truncated VUI\n");
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(avctx, 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, avctx, 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, avctx, 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(gb); /* max_bytes_per_pic_denom */
228  get_ue_golomb(gb); /* max_bits_per_mb_denom */
229  get_ue_golomb(gb); /* log2_max_mv_length_horizontal */
230  get_ue_golomb(gb); /* log2_max_mv_length_vertical */
231  sps->num_reorder_frames = get_ue_golomb(gb);
232  get_ue_golomb(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(avctx, 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 */
280  static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps,
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 
317  void ff_h264_ps_uninit(H264ParamSets *ps)
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->sps_ref);
328  av_buffer_unref(&ps->pps_ref);
329 
330  ps->pps = NULL;
331  ps->sps = NULL;
332 }
333 
334  int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
335  H264ParamSets *ps, int ignore_truncation)
336 {
337  AVBufferRef *sps_buf;
338  int profile_idc, level_idc, constraint_set_flags = 0;
339  unsigned int sps_id;
340  int i, log2_max_frame_num_minus4;
341  SPS *sps;
342  int ret;
343 
344  sps_buf = av_buffer_allocz(sizeof(*sps));
345  if (!sps_buf)
346  return AVERROR(ENOMEM);
347  sps = (SPS*)sps_buf->data;
348 
349  sps->data_size = gb->buffer_end - gb->buffer;
350  if (sps->data_size > sizeof(sps->data)) {
351  av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized SPS\n");
352  sps->data_size = sizeof(sps->data);
353  }
354  memcpy(sps->data, gb->buffer, sps->data_size);
355 
356  profile_idc = get_bits(gb, 8);
357  constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
358  constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
359  constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag
360  constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag
361  constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag
362  constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag
363  skip_bits(gb, 2); // reserved_zero_2bits
364  level_idc = get_bits(gb, 8);
365  sps_id = get_ue_golomb_31(gb);
366 
367  if (sps_id >= MAX_SPS_COUNT) {
368  av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
369  goto fail;
370  }
371 
372  sps->sps_id = sps_id;
373  sps->time_offset_length = 24;
374  sps->profile_idc = profile_idc;
375  sps->constraint_set_flags = constraint_set_flags;
376  sps->level_idc = level_idc;
377  sps->full_range = -1;
378 
379  memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
380  memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
381  sps->scaling_matrix_present = 0;
382  sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
383 
384  if (sps->profile_idc == 100 || // High profile
385  sps->profile_idc == 110 || // High10 profile
386  sps->profile_idc == 122 || // High422 profile
387  sps->profile_idc == 244 || // High444 Predictive profile
388  sps->profile_idc == 44 || // Cavlc444 profile
389  sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
390  sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
391  sps->profile_idc == 118 || // Stereo High profile (MVC)
392  sps->profile_idc == 128 || // Multiview High profile (MVC)
393  sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
394  sps->profile_idc == 144) { // old High444 profile
395  sps->chroma_format_idc = get_ue_golomb_31(gb);
396  if (sps->chroma_format_idc > 3U) {
397  avpriv_request_sample(avctx, "chroma_format_idc %u",
398  sps->chroma_format_idc);
399  goto fail;
400  } else if (sps->chroma_format_idc == 3) {
401  sps->residual_color_transform_flag = get_bits1(gb);
402  if (sps->residual_color_transform_flag) {
403  av_log(avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
404  goto fail;
405  }
406  }
407  sps->bit_depth_luma = get_ue_golomb(gb) + 8;
408  sps->bit_depth_chroma = get_ue_golomb(gb) + 8;
409  if (sps->bit_depth_chroma != sps->bit_depth_luma) {
410  avpriv_request_sample(avctx,
411  "Different chroma and luma bit depth");
412  goto fail;
413  }
414  if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 ||
415  sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
416  av_log(avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
417  sps->bit_depth_luma, sps->bit_depth_chroma);
418  goto fail;
419  }
420  sps->transform_bypass = get_bits1(gb);
421  ret = decode_scaling_matrices(gb, sps, NULL, 1,
422  sps->scaling_matrix4, sps->scaling_matrix8);
423  if (ret < 0)
424  goto fail;
425  sps->scaling_matrix_present |= ret;
426  } else {
427  sps->chroma_format_idc = 1;
428  sps->bit_depth_luma = 8;
429  sps->bit_depth_chroma = 8;
430  }
431 
432  log2_max_frame_num_minus4 = get_ue_golomb(gb);
433  if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
434  log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
435  av_log(avctx, AV_LOG_ERROR,
436  "log2_max_frame_num_minus4 out of range (0-12): %d\n",
437  log2_max_frame_num_minus4);
438  goto fail;
439  }
440  sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
441 
442  sps->poc_type = get_ue_golomb_31(gb);
443 
444  if (sps->poc_type == 0) { // FIXME #define
445  unsigned t = get_ue_golomb(gb);
446  if (t>12) {
447  av_log(avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
448  goto fail;
449  }
450  sps->log2_max_poc_lsb = t + 4;
451  } else if (sps->poc_type == 1) { // FIXME #define
452  sps->delta_pic_order_always_zero_flag = get_bits1(gb);
453  sps->offset_for_non_ref_pic = get_se_golomb(gb);
454  sps->offset_for_top_to_bottom_field = get_se_golomb(gb);
455  sps->poc_cycle_length = get_ue_golomb(gb);
456 
457  if ((unsigned)sps->poc_cycle_length >=
458  FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
459  av_log(avctx, AV_LOG_ERROR,
460  "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
461  goto fail;
462  }
463 
464  for (i = 0; i < sps->poc_cycle_length; i++)
465  sps->offset_for_ref_frame[i] = get_se_golomb(gb);
466  } else if (sps->poc_type != 2) {
467  av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
468  goto fail;
469  }
470 
471  sps->ref_frame_count = get_ue_golomb_31(gb);
472  if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
473  sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
474  if (sps->ref_frame_count > MAX_DELAYED_PIC_COUNT) {
475  av_log(avctx, AV_LOG_ERROR,
476  "too many reference frames %d\n", sps->ref_frame_count);
477  goto fail;
478  }
479  sps->gaps_in_frame_num_allowed_flag = get_bits1(gb);
480  sps->mb_width = get_ue_golomb(gb) + 1;
481  sps->mb_height = get_ue_golomb(gb) + 1;
482 
483  sps->frame_mbs_only_flag = get_bits1(gb);
484 
485  if (sps->mb_height >= INT_MAX / 2U) {
486  av_log(avctx, AV_LOG_ERROR, "height overflow\n");
487  goto fail;
488  }
489  sps->mb_height *= 2 - sps->frame_mbs_only_flag;
490 
491  if (!sps->frame_mbs_only_flag)
492  sps->mb_aff = get_bits1(gb);
493  else
494  sps->mb_aff = 0;
495 
496  if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
497  (unsigned)sps->mb_height >= INT_MAX / 16 ||
498  av_image_check_size(16 * sps->mb_width,
499  16 * sps->mb_height, 0, avctx)) {
500  av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
501  goto fail;
502  }
503 
504  sps->direct_8x8_inference_flag = get_bits1(gb);
505 
506 #ifndef ALLOW_INTERLACE
507  if (sps->mb_aff)
508  av_log(avctx, AV_LOG_ERROR,
509  "MBAFF support not included; enable it at compile-time.\n");
510 #endif
511  sps->crop = get_bits1(gb);
512  if (sps->crop) {
513  unsigned int crop_left = get_ue_golomb(gb);
514  unsigned int crop_right = get_ue_golomb(gb);
515  unsigned int crop_top = get_ue_golomb(gb);
516  unsigned int crop_bottom = get_ue_golomb(gb);
517  int width = 16 * sps->mb_width;
518  int height = 16 * sps->mb_height;
519 
520  if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
521  av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
522  "values are l:%d r:%d t:%d b:%d\n",
523  crop_left, crop_right, crop_top, crop_bottom);
524 
525  sps->crop_left =
526  sps->crop_right =
527  sps->crop_top =
528  sps->crop_bottom = 0;
529  } else {
530  int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
531  int hsub = (sps->chroma_format_idc == 1 ||
532  sps->chroma_format_idc == 2) ? 1 : 0;
533  int step_x = 1 << hsub;
534  int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
535 
536  if (crop_left > (unsigned)INT_MAX / 4 / step_x ||
537  crop_right > (unsigned)INT_MAX / 4 / step_x ||
538  crop_top > (unsigned)INT_MAX / 4 / step_y ||
539  crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
540  (crop_left + crop_right ) * step_x >= width ||
541  (crop_top + crop_bottom) * step_y >= height
542  ) {
543  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);
544  goto fail;
545  }
546 
547  sps->crop_left = crop_left * step_x;
548  sps->crop_right = crop_right * step_x;
549  sps->crop_top = crop_top * step_y;
550  sps->crop_bottom = crop_bottom * step_y;
551  }
552  } else {
553  sps->crop_left =
554  sps->crop_right =
555  sps->crop_top =
556  sps->crop_bottom =
557  sps->crop = 0;
558  }
559 
560  sps->vui_parameters_present_flag = get_bits1(gb);
561  if (sps->vui_parameters_present_flag) {
562  int ret = decode_vui_parameters(gb, avctx, sps);
563  if (ret < 0)
564  goto fail;
565  }
566 
567  if (get_bits_left(gb) < 0) {
568  av_log(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR,
569  "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
570  if (!ignore_truncation)
571  goto fail;
572  }
573 
574  /* if the maximum delay is not stored in the SPS, derive it based on the
575  * level */
576  if (!sps->bitstream_restriction_flag &&
577  (sps->ref_frame_count || avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT)) {
578  sps->num_reorder_frames = MAX_DELAYED_PIC_COUNT - 1;
579  for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
580  if (level_max_dpb_mbs[i][0] == sps->level_idc) {
581  sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
582  sps->num_reorder_frames);
583  break;
584  }
585  }
586  }
587 
588  if (!sps->sar.den)
589  sps->sar.den = 1;
590 
591  if (avctx->debug & FF_DEBUG_PICT_INFO) {
592  static const char csp[4][5] = { "Gray", "420", "422", "444" };
593  av_log(avctx, AV_LOG_DEBUG,
594  "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",
595  sps_id, sps->profile_idc, sps->level_idc,
596  sps->poc_type,
597  sps->ref_frame_count,
598  sps->mb_width, sps->mb_height,
599  sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
600  sps->direct_8x8_inference_flag ? "8B8" : "",
601  sps->crop_left, sps->crop_right,
602  sps->crop_top, sps->crop_bottom,
603  sps->vui_parameters_present_flag ? "VUI" : "",
604  csp[sps->chroma_format_idc],
605  sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
606  sps->timing_info_present_flag ? sps->time_scale : 0,
607  sps->bit_depth_luma,
608  sps->bitstream_restriction_flag ? sps->num_reorder_frames : -1
609  );
610  }
611 
612  /* check if this is a repeat of an already parsed SPS, then keep the
613  * original one.
614  * otherwise drop all PPSes that depend on it */
615  if (ps->sps_list[sps_id] &&
616  !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
617  av_buffer_unref(&sps_buf);
618  } else {
619  remove_sps(ps, sps_id);
620  ps->sps_list[sps_id] = sps_buf;
621  }
622 
623  return 0;
624 
625 fail:
626  av_buffer_unref(&sps_buf);
627  return AVERROR_INVALIDDATA;
628 }
629 
630  static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
631 {
632  int i, j, q, x;
633  const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
634 
635  for (i = 0; i < 6; i++) {
636  pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
637  for (j = 0; j < i; j++)
638  if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
639  64 * sizeof(uint8_t))) {
640  pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
641  break;
642  }
643  if (j < i)
644  continue;
645 
646  for (q = 0; q < max_qp + 1; q++) {
647  int shift = ff_h264_quant_div6[q];
648  int idx = ff_h264_quant_rem6[q];
649  for (x = 0; x < 64; x++)
650  pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
651  ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
652  pps->scaling_matrix8[i][x]) << shift;
653  }
654  }
655 }
656 
657  static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
658 {
659  int i, j, q, x;
660  const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
661  for (i = 0; i < 6; i++) {
662  pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
663  for (j = 0; j < i; j++)
664  if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
665  16 * sizeof(uint8_t))) {
666  pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
667  break;
668  }
669  if (j < i)
670  continue;
671 
672  for (q = 0; q < max_qp + 1; q++) {
673  int shift = ff_h264_quant_div6[q] + 2;
674  int idx = ff_h264_quant_rem6[q];
675  for (x = 0; x < 16; x++)
676  pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
677  ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
678  pps->scaling_matrix4[i][x]) << shift;
679  }
680  }
681 }
682 
683  static void init_dequant_tables(PPS *pps, const SPS *sps)
684 {
685  int i, x;
686  init_dequant4_coeff_table(pps, sps);
687  memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
688 
689  if (pps->transform_8x8_mode)
690  init_dequant8_coeff_table(pps, sps);
691  if (sps->transform_bypass) {
692  for (i = 0; i < 6; i++)
693  for (x = 0; x < 16; x++)
694  pps->dequant4_coeff[i][0][x] = 1 << 6;
695  if (pps->transform_8x8_mode)
696  for (i = 0; i < 6; i++)
697  for (x = 0; x < 64; x++)
698  pps->dequant8_coeff[i][0][x] = 1 << 6;
699  }
700 }
701 
702  static void build_qp_table(PPS *pps, int t, int index, const int depth)
703 {
704  int i;
705  const int max_qp = 51 + 6 * (depth - 8);
706  for (i = 0; i < max_qp + 1; i++)
707  pps->chroma_qp_table[t][i] =
708  ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
709 }
710 
711  static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
712 {
713  int profile_idc = sps->profile_idc;
714 
715  if ((profile_idc == 66 || profile_idc == 77 ||
716  profile_idc == 88) && (sps->constraint_set_flags & 7)) {
717  av_log(logctx, AV_LOG_VERBOSE,
718  "Current profile doesn't provide more RBSP data in PPS, skipping\n");
719  return 0;
720  }
721 
722  return 1;
723 }
724 
725  int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
726  H264ParamSets *ps, int bit_length)
727 {
728  AVBufferRef *pps_buf;
729  const SPS *sps;
730  unsigned int pps_id = get_ue_golomb(gb);
731  PPS *pps;
732  int qp_bd_offset;
733  int bits_left;
734  int ret;
735 
736  if (pps_id >= MAX_PPS_COUNT) {
737  av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
738  return AVERROR_INVALIDDATA;
739  }
740 
741  pps_buf = av_buffer_allocz(sizeof(*pps));
742  if (!pps_buf)
743  return AVERROR(ENOMEM);
744  pps = (PPS*)pps_buf->data;
745 
746  pps->data_size = gb->buffer_end - gb->buffer;
747  if (pps->data_size > sizeof(pps->data)) {
748  av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized PPS "
749  "(%"SIZE_SPECIFIER " > %"SIZE_SPECIFIER ")\n",
750  pps->data_size, sizeof(pps->data));
751  pps->data_size = sizeof(pps->data);
752  }
753  memcpy(pps->data, gb->buffer, pps->data_size);
754 
755  pps->sps_id = get_ue_golomb_31(gb);
756  if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
757  !ps->sps_list[pps->sps_id]) {
758  av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
759  ret = AVERROR_INVALIDDATA;
760  goto fail;
761  }
762  sps = (const SPS*)ps->sps_list[pps->sps_id]->data;
763  if (sps->bit_depth_luma > 14) {
764  av_log(avctx, AV_LOG_ERROR,
765  "Invalid luma bit depth=%d\n",
766  sps->bit_depth_luma);
767  ret = AVERROR_INVALIDDATA;
768  goto fail;
769  } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
770  avpriv_report_missing_feature(avctx,
771  "Unimplemented luma bit depth=%d",
772  sps->bit_depth_luma);
773  ret = AVERROR_PATCHWELCOME;
774  goto fail;
775  }
776 
777  pps->cabac = get_bits1(gb);
778  pps->pic_order_present = get_bits1(gb);
779  pps->slice_group_count = get_ue_golomb(gb) + 1;
780  if (pps->slice_group_count > 1) {
781  pps->mb_slice_group_map_type = get_ue_golomb(gb);
782  av_log(avctx, AV_LOG_ERROR, "FMO not supported\n");
783  }
784  pps->ref_count[0] = get_ue_golomb(gb) + 1;
785  pps->ref_count[1] = get_ue_golomb(gb) + 1;
786  if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
787  av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
788  ret = AVERROR_INVALIDDATA;
789  goto fail;
790  }
791 
792  qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
793 
794  pps->weighted_pred = get_bits1(gb);
795  pps->weighted_bipred_idc = get_bits(gb, 2);
796  pps->init_qp = get_se_golomb(gb) + 26U + qp_bd_offset;
797  pps->init_qs = get_se_golomb(gb) + 26U + qp_bd_offset;
798  pps->chroma_qp_index_offset[0] = get_se_golomb(gb);
799  if (pps->chroma_qp_index_offset[0] < -12 || pps->chroma_qp_index_offset[0] > 12) {
800  ret = AVERROR_INVALIDDATA;
801  goto fail;
802  }
803 
804  pps->deblocking_filter_parameters_present = get_bits1(gb);
805  pps->constrained_intra_pred = get_bits1(gb);
806  pps->redundant_pic_cnt_present = get_bits1(gb);
807 
808  pps->transform_8x8_mode = 0;
809  memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
810  sizeof(pps->scaling_matrix4));
811  memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
812  sizeof(pps->scaling_matrix8));
813 
814  bits_left = bit_length - get_bits_count(gb);
815  if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
816  pps->transform_8x8_mode = get_bits1(gb);
817  ret = decode_scaling_matrices(gb, sps, pps, 0,
818  pps->scaling_matrix4, pps->scaling_matrix8);
819  if (ret < 0)
820  goto fail;
821  // second_chroma_qp_index_offset
822  pps->chroma_qp_index_offset[1] = get_se_golomb(gb);
823  if (pps->chroma_qp_index_offset[1] < -12 || pps->chroma_qp_index_offset[1] > 12) {
824  ret = AVERROR_INVALIDDATA;
825  goto fail;
826  }
827  } else {
828  pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
829  }
830 
831  build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
832  sps->bit_depth_luma);
833  build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
834  sps->bit_depth_luma);
835 
836  init_dequant_tables(pps, sps);
837 
838  if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
839  pps->chroma_qp_diff = 1;
840 
841  if (avctx->debug & FF_DEBUG_PICT_INFO) {
842  av_log(avctx, AV_LOG_DEBUG,
843  "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
844  pps_id, pps->sps_id,
845  pps->cabac ? "CABAC" : "CAVLC",
846  pps->slice_group_count,
847  pps->ref_count[0], pps->ref_count[1],
848  pps->weighted_pred ? "weighted" : "",
849  pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
850  pps->deblocking_filter_parameters_present ? "LPAR" : "",
851  pps->constrained_intra_pred ? "CONSTR" : "",
852  pps->redundant_pic_cnt_present ? "REDU" : "",
853  pps->transform_8x8_mode ? "8x8DCT" : "");
854  }
855 
856  remove_pps(ps, pps_id);
857  ps->pps_list[pps_id] = pps_buf;
858 
859  return 0;
860 
861 fail:
862  av_buffer_unref(&pps_buf);
863  return ret;
864 }
SPS::chroma_format_idc
int chroma_format_idc
Definition: h264_ps.h:47
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int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, H264ParamSets *ps, int bit_length)
Decode PPS.
Definition: h264_ps.c:725
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static unsigned int show_bits1(GetBitContext *s)
Definition: get_bits.h:341
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#define MAX_LOG2_MAX_FRAME_NUM
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Invalid data found when processing input.
Definition: error.h:59
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Definition: h264_ps.c:108
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Definition: sonic.c:82
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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
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Definition: h264_ps.h:37
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read signed exp golomb code.
Definition: golomb.h:183
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Definition: get_bits.h:269
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Definition: h264_ps.h:43
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Definition: h264_ps.h:108
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Log a generic warning message about a missing feature.
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Definition: h264_ps.h:144
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Definition: h264_ps.h:134
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Definition: get_bits.h:200
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Definition: h264_ps.h:122
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Detailed information.
Definition: log.h:192
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enum AVChromaLocation chroma_sample_location
This defines the location of chroma samples.
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static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:596
h264_ps.h
H.264 parameter set handling.
SPS::mb_aff
int mb_aff
mb_adaptive_frame_field_flag
Definition: h264_ps.h:62
SPS::color_trc
enum AVColorTransferCharacteristic color_trc
Definition: h264_ps.h:77
H264ParamSets::sps_ref
AVBufferRef * sps_ref
Definition: h264_ps.h:142
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AV_CODEC_FLAG2_IGNORE_CROP
#define AV_CODEC_FLAG2_IGNORE_CROP
Discard cropping information from SPS.
Definition: avcodec.h:924
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
SPS::poc_type
int poc_type
pic_order_cnt_type
Definition: h264_ps.h:50
PPS::constrained_intra_pred
int constrained_intra_pred
constrained_intra_pred_flag
Definition: h264_ps.h:121
SPS::num_reorder_frames
int num_reorder_frames
Definition: h264_ps.h:85
AVERROR
#define AVERROR(e)
Definition: error.h:43
SPS::time_offset_length
int time_offset_length
Definition: h264_ps.h:92
ff_zigzag_scan
const uint8_t ff_zigzag_scan[16+1]
Definition: mathtables.c:109
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
width
uint16_t width
Definition: gdv.c:47
PPS::weighted_pred
int weighted_pred
weighted_pred_flag
Definition: h264_ps.h:115
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:280
MIN_LOG2_MAX_FRAME_NUM
#define MIN_LOG2_MAX_FRAME_NUM
Definition: h264_ps.c:39
SPS::residual_color_transform_flag
int residual_color_transform_flag
residual_colour_transform_flag
Definition: h264_ps.h:99
FFMAX
#define FFMAX(a, b)
Definition: common.h:94
fail
#define fail()
Definition: checkasm.h:116
SPS::delta_pic_order_always_zero_flag
int delta_pic_order_always_zero_flag
Definition: h264_ps.h:52
SPS::offset_for_top_to_bottom_field
int offset_for_top_to_bottom_field
Definition: h264_ps.h:54
av_color_primaries_name
const char * av_color_primaries_name(enum AVColorPrimaries primaries)
Definition: pixdesc.c:2709
remove_sps
static void remove_sps(H264ParamSets *s, int id)
Definition: h264_ps.c:94
init_dequant8_coeff_table
static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
Definition: h264_ps.c:630
SPS::crop
int crop
frame_cropping_flag
Definition: h264_ps.h:64
PPS::scaling_matrix8
uint8_t scaling_matrix8[6][64]
Definition: h264_ps.h:125
SPS::data_size
size_t data_size
Definition: h264_ps.h:102
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:282
SPS::ref_frame_count
int ref_frame_count
num_ref_frames
Definition: h264_ps.h:56
SPS::initial_cpb_removal_delay_length
int initial_cpb_removal_delay_length
initial_cpb_removal_delay_length_minus1 + 1
Definition: h264_ps.h:94
PPS::data
uint8_t data[4096]
Definition: h264_ps.h:128
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
SPS::poc_cycle_length
int poc_cycle_length
num_ref_frames_in_pic_order_cnt_cycle
Definition: h264_ps.h:55
SPS::colour_description_present_flag
int colour_description_present_flag
Definition: h264_ps.h:75
SPS::sar
AVRational sar
Definition: h264_ps.h:72
PPS::chroma_qp_table
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:126
PPS::init_qp
int init_qp
pic_init_qp_minus26 + 26
Definition: h264_ps.h:117
SPS::direct_8x8_inference_flag
int direct_8x8_inference_flag
Definition: h264_ps.h:63
SPS::scaling_matrix8
uint8_t scaling_matrix8[6][64]
Definition: h264_ps.h:88
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:252
SPS::sps_id
unsigned int sps_id
Definition: h264_ps.h:44
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen_template.c:36
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:85
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
PPS::pic_order_present
int pic_order_present
pic_order_present_flag
Definition: h264_ps.h:111
SPS::offset_for_ref_frame
short offset_for_ref_frame[256]
Definition: h264_ps.h:83
more_rbsp_data_in_pps
static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
Definition: h264_ps.c:711
decode_vui_parameters
static int decode_vui_parameters(GetBitContext *gb, AVCodecContext *avctx, SPS *sps)
Definition: h264_ps.c:134
SPS::timing_info_present_flag
int timing_info_present_flag
Definition: h264_ps.h:79
SPS::vcl_hrd_parameters_present_flag
int vcl_hrd_parameters_present_flag
Definition: h264_ps.h:90
avcodec.h
Libavcodec external API header.
MAX_DELAYED_PIC_COUNT
#define MAX_DELAYED_PIC_COUNT
Definition: h264dec.h:56
H264ParamSets::pps_list
AVBufferRef * pps_list[MAX_PPS_COUNT]
Definition: h264_ps.h:139
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:100
AVCodecContext::debug
int debug
debug
Definition: avcodec.h:2598
AVCodecContext
main external API structure.
Definition: avcodec.h:1518
ff_h264_chroma_qp
const uint8_t ff_h264_chroma_qp[7][QP_MAX_NUM+1]
Definition: h264data.c:203
SPS::dpb_output_delay_length
int dpb_output_delay_length
dpb_output_delay_length_minus1 + 1
Definition: h264_ps.h:96
AVBufferRef::data
uint8_t * data
The data buffer.
Definition: buffer.h:89
SPS::vui_parameters_present_flag
int vui_parameters_present_flag
Definition: h264_ps.h:71
AVCodecContext::codec_tag
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1543
init_dequant4_coeff_table
static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
Definition: h264_ps.c:657
av_buffer_allocz
AVBufferRef * av_buffer_allocz(int size)
Same as av_buffer_alloc(), except the returned buffer will be initialized to zero.
Definition: buffer.c:83
SPS::constraint_set_flags
int constraint_set_flags
constraint_set[0-3]_flag
Definition: h264_ps.h:100
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:321
ff_h264_quant_div6
const uint8_t ff_h264_quant_div6[QP_MAX_NUM+1]
Definition: h264data.c:182
skip_bits
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:314
pps
static int FUNC() pps(CodedBitstreamContext *ctx, RWContext *rw, H264RawPPS *current)
Definition: cbs_h264_syntax_template.c:356
index
int index
Definition: gxfenc.c:89
EXTENDED_SAR
#define EXTENDED_SAR
Definition: h264_ps.c:41
ff_zigzag_direct
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
sps
static int FUNC() sps(CodedBitstreamContext *ctx, RWContext *rw, H264RawSPS *current)
Definition: cbs_h264_syntax_template.c:214
FF_COMPLIANCE_STRICT
#define FF_COMPLIANCE_STRICT
Strictly conform to all the things in the spec no matter what consequences.
Definition: avcodec.h:2578
H264ParamSets::sps
const SPS * sps
Definition: h264_ps.h:145
PPS::sps_id
unsigned int sps_id
Definition: h264_ps.h:109
SPS::log2_max_poc_lsb
int log2_max_poc_lsb
log2_max_pic_order_cnt_lsb_minus4
Definition: h264_ps.h:51
get_bits_long
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:354
AVBufferRef::size
int size
Size of data in bytes.
Definition: buffer.h:93
SPS::time_scale
uint32_t time_scale
Definition: h264_ps.h:81
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.
PPS::transform_8x8_mode
int transform_8x8_mode
transform_8x8_mode_flag
Definition: h264_ps.h:123
SIZE_SPECIFIER
#define SIZE_SPECIFIER
Definition: internal.h:262
SPS::pic_struct_present_flag
int pic_struct_present_flag
Definition: h264_ps.h:91
ff_h264_dequant8_coeff_init
const uint8_t ff_h264_dequant8_coeff_init[6][6]
Definition: h264data.c:165
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:81
SPS::mb_height
int mb_height
Definition: h264_ps.h:60
PPS::init_qs
int init_qs
pic_init_qs_minus26 + 26
Definition: h264_ps.h:118
internal.h
common internal api header.
if
if(ret< 0)
Definition: vf_mcdeint.c:279
SPS::data
uint8_t data[4096]
Definition: h264_ps.h:101
H264ParamSets::pps_ref
AVBufferRef * pps_ref
Definition: h264_ps.h:141
SPS::nal_hrd_parameters_present_flag
int nal_hrd_parameters_present_flag
Definition: h264_ps.h:89
PPS::data_size
size_t data_size
Definition: h264_ps.h:129
SPS::log2_max_frame_num
int log2_max_frame_num
log2_max_frame_num_minus4 + 4
Definition: h264_ps.h:49
av_color_transfer_name
const char * av_color_transfer_name(enum AVColorTransferCharacteristic transfer)
Definition: pixdesc.c:2728
GetBitContext::buffer_end
const uint8_t * buffer_end
Definition: get_bits.h:57
default_scaling4
static const uint8_t default_scaling4[2][16]
Definition: h264_ps.c:43
AVRational::den
int den
Denominator.
Definition: rational.h:60
ff_h264_ps_uninit
void ff_h264_ps_uninit(H264ParamSets *ps)
Uninit H264 param sets structure.
Definition: h264_ps.c:317
SPS::bit_depth_luma
int bit_depth_luma
bit_depth_luma_minus8 + 8
Definition: h264_ps.h:97
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:334
SPS::mb_width
int mb_width
pic_width_in_mbs_minus1 + 1
Definition: h264_ps.h:58
AVCodecContext::flags2
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1605
PPS::slice_group_count
int slice_group_count
num_slice_groups_minus1 + 1
Definition: h264_ps.h:112
SPS::cpb_cnt
int cpb_cnt
See H.264 E.1.2.
Definition: h264_ps.h:93
PPS::dequant4_buffer
uint32_t dequant4_buffer[6][QP_MAX_NUM+1][16]
Definition: h264_ps.h:131
default_scaling8
static const uint8_t default_scaling8[2][64]
Definition: h264_ps.c:50
PPS::dequant8_buffer
uint32_t dequant8_buffer[6][QP_MAX_NUM+1][64]
Definition: h264_ps.h:132
SPS::cpb_removal_delay_length
int cpb_removal_delay_length
cpb_removal_delay_length_minus1 + 1
Definition: h264_ps.h:95
init_dequant_tables
static void init_dequant_tables(PPS *pps, const SPS *sps)
Definition: h264_ps.c:683
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:366
SPS::crop_bottom
unsigned int crop_bottom
frame_cropping_rect_bottom_offset
Definition: h264_ps.h:70
golomb.h
exp golomb vlc stuff
id
enum AVCodecID id
Definition: extract_extradata_bsf.c:250
SPS::level_idc
int level_idc
Definition: h264_ps.h:46
AVCodecContext::strict_std_compliance
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:2576
ff_h264_dequant8_coeff_init_scan
const uint8_t ff_h264_dequant8_coeff_init_scan[16]
Definition: h264data.c:161
build_qp_table
static void build_qp_table(PPS *pps, int t, int index, const int depth)
Definition: h264_ps.c:702
PPS::mb_slice_group_map_type
int mb_slice_group_map_type
Definition: h264_ps.h:113
SPS::colorspace
enum AVColorSpace colorspace
Definition: h264_ps.h:78
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