2 * H.26L/H.264/AVC/JVT/14496-10/... parameter set decoding
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
5 * This file is part of FFmpeg.
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.
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.
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
24 * H.264 / AVC / MPEG4 part10 parameter set decoding.
25 * @author Michael Niedermayer <michaelni@gmx.at>
30 #include "libavutil/imgutils.h"
38 #define MAX_LOG2_MAX_FRAME_NUM (12 + 4)
39 #define MIN_LOG2_MAX_FRAME_NUM 4
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 }
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 }
67 /* maximum number of MBs in the DPB for a given level */
68 static const int level_max_dpb_mbs[][2] = {
87 static inline int decode_hrd_parameters(H264Context *h, SPS *sps)
90 cpb_count = get_ue_golomb_31(&h->gb) + 1;
92 if (cpb_count > 32U) {
93 av_log(h->avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
94 return AVERROR_INVALIDDATA;
97 get_bits(&h->gb, 4); /* bit_rate_scale */
98 get_bits(&h->gb, 4); /* cpb_size_scale */
99 for (i = 0; i < cpb_count; i++) {
100 get_ue_golomb_long(&h->gb); /* bit_rate_value_minus1 */
101 get_ue_golomb_long(&h->gb); /* cpb_size_value_minus1 */
102 get_bits1(&h->gb); /* cbr_flag */
104 sps->initial_cpb_removal_delay_length = get_bits(&h->gb, 5) + 1;
105 sps->cpb_removal_delay_length = get_bits(&h->gb, 5) + 1;
106 sps->dpb_output_delay_length = get_bits(&h->gb, 5) + 1;
107 sps->time_offset_length = get_bits(&h->gb, 5);
108 sps->cpb_cnt = cpb_count;
112 static inline int decode_vui_parameters(H264Context *h, SPS *sps)
114 int aspect_ratio_info_present_flag;
115 unsigned int aspect_ratio_idc;
117 aspect_ratio_info_present_flag = get_bits1(&h->gb);
119 if (aspect_ratio_info_present_flag) {
120 aspect_ratio_idc = get_bits(&h->gb, 8);
121 if (aspect_ratio_idc == EXTENDED_SAR) {
122 sps->sar.num = get_bits(&h->gb, 16);
123 sps->sar.den = get_bits(&h->gb, 16);
124 } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(ff_h264_pixel_aspect)) {
125 sps->sar = ff_h264_pixel_aspect[aspect_ratio_idc];
127 av_log(h->avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
128 return AVERROR_INVALIDDATA;
135 if (get_bits1(&h->gb)) /* overscan_info_present_flag */
136 get_bits1(&h->gb); /* overscan_appropriate_flag */
138 sps->video_signal_type_present_flag = get_bits1(&h->gb);
139 if (sps->video_signal_type_present_flag) {
140 get_bits(&h->gb, 3); /* video_format */
141 sps->full_range = get_bits1(&h->gb); /* video_full_range_flag */
143 sps->colour_description_present_flag = get_bits1(&h->gb);
144 if (sps->colour_description_present_flag) {
145 sps->color_primaries = get_bits(&h->gb, 8); /* colour_primaries */
146 sps->color_trc = get_bits(&h->gb, 8); /* transfer_characteristics */
147 sps->colorspace = get_bits(&h->gb, 8); /* matrix_coefficients */
148 if (sps->color_primaries >= AVCOL_PRI_NB)
149 sps->color_primaries = AVCOL_PRI_UNSPECIFIED;
150 if (sps->color_trc >= AVCOL_TRC_NB)
151 sps->color_trc = AVCOL_TRC_UNSPECIFIED;
152 if (sps->colorspace >= AVCOL_SPC_NB)
153 sps->colorspace = AVCOL_SPC_UNSPECIFIED;
157 /* chroma_location_info_present_flag */
158 if (get_bits1(&h->gb)) {
159 /* chroma_sample_location_type_top_field */
160 h->avctx->chroma_sample_location = get_ue_golomb(&h->gb) + 1;
161 get_ue_golomb(&h->gb); /* chroma_sample_location_type_bottom_field */
164 if (show_bits1(&h->gb) && get_bits_left(&h->gb) < 10) {
165 av_log(h->avctx, AV_LOG_WARNING, "Truncated VUI\n");
169 sps->timing_info_present_flag = get_bits1(&h->gb);
170 if (sps->timing_info_present_flag) {
171 unsigned num_units_in_tick = get_bits_long(&h->gb, 32);
172 unsigned time_scale = get_bits_long(&h->gb, 32);
173 if (!num_units_in_tick || !time_scale) {
174 av_log(h->avctx, AV_LOG_ERROR,
175 "time_scale/num_units_in_tick invalid or unsupported (%u/%u)\n",
176 time_scale, num_units_in_tick);
177 sps->timing_info_present_flag = 0;
179 sps->num_units_in_tick = num_units_in_tick;
180 sps->time_scale = time_scale;
182 sps->fixed_frame_rate_flag = get_bits1(&h->gb);
185 sps->nal_hrd_parameters_present_flag = get_bits1(&h->gb);
186 if (sps->nal_hrd_parameters_present_flag)
187 if (decode_hrd_parameters(h, sps) < 0)
188 return AVERROR_INVALIDDATA;
189 sps->vcl_hrd_parameters_present_flag = get_bits1(&h->gb);
190 if (sps->vcl_hrd_parameters_present_flag)
191 if (decode_hrd_parameters(h, sps) < 0)
192 return AVERROR_INVALIDDATA;
193 if (sps->nal_hrd_parameters_present_flag ||
194 sps->vcl_hrd_parameters_present_flag)
195 get_bits1(&h->gb); /* low_delay_hrd_flag */
196 sps->pic_struct_present_flag = get_bits1(&h->gb);
197 if (!get_bits_left(&h->gb))
199 sps->bitstream_restriction_flag = get_bits1(&h->gb);
200 if (sps->bitstream_restriction_flag) {
201 get_bits1(&h->gb); /* motion_vectors_over_pic_boundaries_flag */
202 get_ue_golomb(&h->gb); /* max_bytes_per_pic_denom */
203 get_ue_golomb(&h->gb); /* max_bits_per_mb_denom */
204 get_ue_golomb(&h->gb); /* log2_max_mv_length_horizontal */
205 get_ue_golomb(&h->gb); /* log2_max_mv_length_vertical */
206 sps->num_reorder_frames = get_ue_golomb(&h->gb);
207 get_ue_golomb(&h->gb); /*max_dec_frame_buffering*/
209 if (get_bits_left(&h->gb) < 0) {
210 sps->num_reorder_frames = 0;
211 sps->bitstream_restriction_flag = 0;
214 if (sps->num_reorder_frames > 16U
215 /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
216 av_log(h->avctx, AV_LOG_ERROR,
217 "Clipping illegal num_reorder_frames %d\n",
218 sps->num_reorder_frames);
219 sps->num_reorder_frames = 16;
220 return AVERROR_INVALIDDATA;
227 static void decode_scaling_list(H264Context *h, uint8_t *factors, int size,
228 const uint8_t *jvt_list,
229 const uint8_t *fallback_list)
231 int i, last = 8, next = 8;
232 const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
233 if (!get_bits1(&h->gb)) /* matrix not written, we use the predicted one */
234 memcpy(factors, fallback_list, size * sizeof(uint8_t));
236 for (i = 0; i < size; i++) {
238 next = (last + get_se_golomb(&h->gb)) & 0xff;
239 if (!i && !next) { /* matrix not written, we use the preset one */
240 memcpy(factors, jvt_list, size * sizeof(uint8_t));
243 last = factors[scan[i]] = next ? next : last;
247 static void decode_scaling_matrices(H264Context *h, SPS *sps,
248 PPS *pps, int is_sps,
249 uint8_t(*scaling_matrix4)[16],
250 uint8_t(*scaling_matrix8)[64])
252 int fallback_sps = !is_sps && sps->scaling_matrix_present;
253 const uint8_t *fallback[4] = {
254 fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
255 fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
256 fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
257 fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
259 if (get_bits1(&h->gb)) {
260 sps->scaling_matrix_present |= is_sps;
261 decode_scaling_list(h, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
262 decode_scaling_list(h, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
263 decode_scaling_list(h, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
264 decode_scaling_list(h, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
265 decode_scaling_list(h, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
266 decode_scaling_list(h, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
267 if (is_sps || pps->transform_8x8_mode) {
268 decode_scaling_list(h, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
269 decode_scaling_list(h, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
270 if (sps->chroma_format_idc == 3) {
271 decode_scaling_list(h, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
272 decode_scaling_list(h, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
273 decode_scaling_list(h, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
274 decode_scaling_list(h, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
280 int ff_h264_decode_seq_parameter_set(H264Context *h, int ignore_truncation)
282 int profile_idc, level_idc, constraint_set_flags = 0;
284 int i, log2_max_frame_num_minus4;
287 sps = av_mallocz(sizeof(SPS));
289 return AVERROR(ENOMEM);
291 sps->data_size = h->gb.buffer_end - h->gb.buffer;
292 if (sps->data_size > sizeof(sps->data)) {
293 av_log(h->avctx, AV_LOG_WARNING, "Truncating likely oversized SPS\n");
294 sps->data_size = sizeof(sps->data);
296 memcpy(sps->data, h->gb.buffer, sps->data_size);
298 profile_idc = get_bits(&h->gb, 8);
299 constraint_set_flags |= get_bits1(&h->gb) << 0; // constraint_set0_flag
300 constraint_set_flags |= get_bits1(&h->gb) << 1; // constraint_set1_flag
301 constraint_set_flags |= get_bits1(&h->gb) << 2; // constraint_set2_flag
302 constraint_set_flags |= get_bits1(&h->gb) << 3; // constraint_set3_flag
303 constraint_set_flags |= get_bits1(&h->gb) << 4; // constraint_set4_flag
304 constraint_set_flags |= get_bits1(&h->gb) << 5; // constraint_set5_flag
305 skip_bits(&h->gb, 2); // reserved_zero_2bits
306 level_idc = get_bits(&h->gb, 8);
307 sps_id = get_ue_golomb_31(&h->gb);
309 if (sps_id >= MAX_SPS_COUNT) {
310 av_log(h->avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
314 sps->sps_id = sps_id;
315 sps->time_offset_length = 24;
316 sps->profile_idc = profile_idc;
317 sps->constraint_set_flags = constraint_set_flags;
318 sps->level_idc = level_idc;
319 sps->full_range = -1;
321 memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
322 memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
323 sps->scaling_matrix_present = 0;
324 sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
326 if (sps->profile_idc == 100 || // High profile
327 sps->profile_idc == 110 || // High10 profile
328 sps->profile_idc == 122 || // High422 profile
329 sps->profile_idc == 244 || // High444 Predictive profile
330 sps->profile_idc == 44 || // Cavlc444 profile
331 sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
332 sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
333 sps->profile_idc == 118 || // Stereo High profile (MVC)
334 sps->profile_idc == 128 || // Multiview High profile (MVC)
335 sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
336 sps->profile_idc == 144) { // old High444 profile
337 sps->chroma_format_idc = get_ue_golomb_31(&h->gb);
338 if (sps->chroma_format_idc > 3U) {
339 avpriv_request_sample(h->avctx, "chroma_format_idc %u",
340 sps->chroma_format_idc);
342 } else if (sps->chroma_format_idc == 3) {
343 sps->residual_color_transform_flag = get_bits1(&h->gb);
344 if (sps->residual_color_transform_flag) {
345 av_log(h->avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
349 sps->bit_depth_luma = get_ue_golomb(&h->gb) + 8;
350 sps->bit_depth_chroma = get_ue_golomb(&h->gb) + 8;
351 if (sps->bit_depth_chroma != sps->bit_depth_luma) {
352 avpriv_request_sample(h->avctx,
353 "Different chroma and luma bit depth");
356 if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 ||
357 sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
358 av_log(h->avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
359 sps->bit_depth_luma, sps->bit_depth_chroma);
362 sps->transform_bypass = get_bits1(&h->gb);
363 decode_scaling_matrices(h, sps, NULL, 1,
364 sps->scaling_matrix4, sps->scaling_matrix8);
366 sps->chroma_format_idc = 1;
367 sps->bit_depth_luma = 8;
368 sps->bit_depth_chroma = 8;
371 log2_max_frame_num_minus4 = get_ue_golomb(&h->gb);
372 if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
373 log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
374 av_log(h->avctx, AV_LOG_ERROR,
375 "log2_max_frame_num_minus4 out of range (0-12): %d\n",
376 log2_max_frame_num_minus4);
379 sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
381 sps->poc_type = get_ue_golomb_31(&h->gb);
383 if (sps->poc_type == 0) { // FIXME #define
384 unsigned t = get_ue_golomb(&h->gb);
386 av_log(h->avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
389 sps->log2_max_poc_lsb = t + 4;
390 } else if (sps->poc_type == 1) { // FIXME #define
391 sps->delta_pic_order_always_zero_flag = get_bits1(&h->gb);
392 sps->offset_for_non_ref_pic = get_se_golomb(&h->gb);
393 sps->offset_for_top_to_bottom_field = get_se_golomb(&h->gb);
394 sps->poc_cycle_length = get_ue_golomb(&h->gb);
396 if ((unsigned)sps->poc_cycle_length >=
397 FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
398 av_log(h->avctx, AV_LOG_ERROR,
399 "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
403 for (i = 0; i < sps->poc_cycle_length; i++)
404 sps->offset_for_ref_frame[i] = get_se_golomb(&h->gb);
405 } else if (sps->poc_type != 2) {
406 av_log(h->avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
410 sps->ref_frame_count = get_ue_golomb_31(&h->gb);
411 if (h->avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
412 sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
413 if (sps->ref_frame_count > H264_MAX_PICTURE_COUNT - 2 ||
414 sps->ref_frame_count > 16U) {
415 av_log(h->avctx, AV_LOG_ERROR,
416 "too many reference frames %d\n", sps->ref_frame_count);
419 sps->gaps_in_frame_num_allowed_flag = get_bits1(&h->gb);
420 sps->mb_width = get_ue_golomb(&h->gb) + 1;
421 sps->mb_height = get_ue_golomb(&h->gb) + 1;
422 if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
423 (unsigned)sps->mb_height >= INT_MAX / 16 ||
424 av_image_check_size(16 * sps->mb_width,
425 16 * sps->mb_height, 0, h->avctx)) {
426 av_log(h->avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
430 sps->frame_mbs_only_flag = get_bits1(&h->gb);
431 if (!sps->frame_mbs_only_flag)
432 sps->mb_aff = get_bits1(&h->gb);
436 sps->direct_8x8_inference_flag = get_bits1(&h->gb);
438 #ifndef ALLOW_INTERLACE
440 av_log(h->avctx, AV_LOG_ERROR,
441 "MBAFF support not included; enable it at compile-time.\n");
443 sps->crop = get_bits1(&h->gb);
445 unsigned int crop_left = get_ue_golomb(&h->gb);
446 unsigned int crop_right = get_ue_golomb(&h->gb);
447 unsigned int crop_top = get_ue_golomb(&h->gb);
448 unsigned int crop_bottom = get_ue_golomb(&h->gb);
449 int width = 16 * sps->mb_width;
450 int height = 16 * sps->mb_height * (2 - sps->frame_mbs_only_flag);
452 if (h->avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
453 av_log(h->avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
454 "values are l:%d r:%d t:%d b:%d\n",
455 crop_left, crop_right, crop_top, crop_bottom);
460 sps->crop_bottom = 0;
462 int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
463 int hsub = (sps->chroma_format_idc == 1 ||
464 sps->chroma_format_idc == 2) ? 1 : 0;
465 int step_x = 1 << hsub;
466 int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
468 if (crop_left & (0x1F >> (sps->bit_depth_luma > 8)) &&
469 !(h->avctx->flags & AV_CODEC_FLAG_UNALIGNED)) {
470 crop_left &= ~(0x1F >> (sps->bit_depth_luma > 8));
471 av_log(h->avctx, AV_LOG_WARNING,
472 "Reducing left cropping to %d "
473 "chroma samples to preserve alignment.\n",
477 if (crop_left > (unsigned)INT_MAX / 4 / step_x ||
478 crop_right > (unsigned)INT_MAX / 4 / step_x ||
479 crop_top > (unsigned)INT_MAX / 4 / step_y ||
480 crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
481 (crop_left + crop_right ) * step_x >= width ||
482 (crop_top + crop_bottom) * step_y >= height
484 av_log(h->avctx, AV_LOG_ERROR, "crop values invalid %d %d %d %d / %d %d\n", crop_left, crop_right, crop_top, crop_bottom, width, height);
488 sps->crop_left = crop_left * step_x;
489 sps->crop_right = crop_right * step_x;
490 sps->crop_top = crop_top * step_y;
491 sps->crop_bottom = crop_bottom * step_y;
501 sps->vui_parameters_present_flag = get_bits1(&h->gb);
502 if (sps->vui_parameters_present_flag) {
503 int ret = decode_vui_parameters(h, sps);
508 if (get_bits_left(&h->gb) < 0) {
509 av_log(h->avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR,
510 "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(&h->gb));
511 if (!ignore_truncation)
515 /* if the maximum delay is not stored in the SPS, derive it based on the
517 if (!sps->bitstream_restriction_flag) {
518 sps->num_reorder_frames = MAX_DELAYED_PIC_COUNT - 1;
519 for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
520 if (level_max_dpb_mbs[i][0] == sps->level_idc) {
521 sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
522 sps->num_reorder_frames);
531 if (h->avctx->debug & FF_DEBUG_PICT_INFO) {
532 static const char csp[4][5] = { "Gray", "420", "422", "444" };
533 av_log(h->avctx, AV_LOG_DEBUG,
534 "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",
535 sps_id, sps->profile_idc, sps->level_idc,
537 sps->ref_frame_count,
538 sps->mb_width, sps->mb_height,
539 sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
540 sps->direct_8x8_inference_flag ? "8B8" : "",
541 sps->crop_left, sps->crop_right,
542 sps->crop_top, sps->crop_bottom,
543 sps->vui_parameters_present_flag ? "VUI" : "",
544 csp[sps->chroma_format_idc],
545 sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
546 sps->timing_info_present_flag ? sps->time_scale : 0,
548 sps->bitstream_restriction_flag ? sps->num_reorder_frames : -1
553 av_free(h->sps_buffers[sps_id]);
554 h->sps_buffers[sps_id] = sps;
560 return AVERROR_INVALIDDATA;
563 static void build_qp_table(PPS *pps, int t, int index, const int depth)
566 const int max_qp = 51 + 6 * (depth - 8);
567 for (i = 0; i < max_qp + 1; i++)
568 pps->chroma_qp_table[t][i] =
569 ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
572 static int more_rbsp_data_in_pps(H264Context *h, PPS *pps)
574 const SPS *sps = h->sps_buffers[pps->sps_id];
575 int profile_idc = sps->profile_idc;
577 if ((profile_idc == 66 || profile_idc == 77 ||
578 profile_idc == 88) && (sps->constraint_set_flags & 7)) {
579 av_log(h->avctx, AV_LOG_VERBOSE,
580 "Current profile doesn't provide more RBSP data in PPS, skipping\n");
587 int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length)
590 unsigned int pps_id = get_ue_golomb(&h->gb);
596 if (pps_id >= MAX_PPS_COUNT) {
597 av_log(h->avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
598 return AVERROR_INVALIDDATA;
601 pps = av_mallocz(sizeof(PPS));
603 return AVERROR(ENOMEM);
604 pps->data_size = h->gb.buffer_end - h->gb.buffer;
605 if (pps->data_size > sizeof(pps->data)) {
606 av_log(h->avctx, AV_LOG_WARNING, "Truncating likely oversized PPS\n");
607 pps->data_size = sizeof(pps->data);
609 memcpy(pps->data, h->gb.buffer, pps->data_size);
610 pps->sps_id = get_ue_golomb_31(&h->gb);
611 if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
612 !h->sps_buffers[pps->sps_id]) {
613 av_log(h->avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
614 ret = AVERROR_INVALIDDATA;
617 sps = h->sps_buffers[pps->sps_id];
618 if (sps->bit_depth_luma > 14) {
619 av_log(h->avctx, AV_LOG_ERROR,
620 "Invalid luma bit depth=%d\n",
621 sps->bit_depth_luma);
622 ret = AVERROR_INVALIDDATA;
624 } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
625 av_log(h->avctx, AV_LOG_ERROR,
626 "Unimplemented luma bit depth=%d\n",
627 sps->bit_depth_luma);
628 ret = AVERROR_PATCHWELCOME;
632 pps->cabac = get_bits1(&h->gb);
633 pps->pic_order_present = get_bits1(&h->gb);
634 pps->slice_group_count = get_ue_golomb(&h->gb) + 1;
635 if (pps->slice_group_count > 1) {
636 pps->mb_slice_group_map_type = get_ue_golomb(&h->gb);
637 av_log(h->avctx, AV_LOG_ERROR, "FMO not supported\n");
638 switch (pps->mb_slice_group_map_type) {
641 | for (i = 0; i <= num_slice_groups_minus1; i++) | | |
642 | run_length[i] |1 |ue(v) |
647 | for (i = 0; i < num_slice_groups_minus1; i++) { | | |
648 | top_left_mb[i] |1 |ue(v) |
649 | bottom_right_mb[i] |1 |ue(v) |
657 | slice_group_change_direction_flag |1 |u(1) |
658 | slice_group_change_rate_minus1 |1 |ue(v) |
663 | slice_group_id_cnt_minus1 |1 |ue(v) |
664 | for (i = 0; i <= slice_group_id_cnt_minus1; i++)| | |
665 | slice_group_id[i] |1 |u(v) |
670 pps->ref_count[0] = get_ue_golomb(&h->gb) + 1;
671 pps->ref_count[1] = get_ue_golomb(&h->gb) + 1;
672 if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
673 av_log(h->avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
674 ret = AVERROR_INVALIDDATA;
678 qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
680 pps->weighted_pred = get_bits1(&h->gb);
681 pps->weighted_bipred_idc = get_bits(&h->gb, 2);
682 pps->init_qp = get_se_golomb(&h->gb) + 26 + qp_bd_offset;
683 pps->init_qs = get_se_golomb(&h->gb) + 26 + qp_bd_offset;
684 pps->chroma_qp_index_offset[0] = get_se_golomb(&h->gb);
685 pps->deblocking_filter_parameters_present = get_bits1(&h->gb);
686 pps->constrained_intra_pred = get_bits1(&h->gb);
687 pps->redundant_pic_cnt_present = get_bits1(&h->gb);
689 pps->transform_8x8_mode = 0;
690 // contents of sps/pps can change even if id doesn't, so reinit
691 h->dequant_coeff_pps = -1;
692 memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4,
693 sizeof(pps->scaling_matrix4));
694 memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8,
695 sizeof(pps->scaling_matrix8));
697 bits_left = bit_length - get_bits_count(&h->gb);
698 if (bits_left > 0 && more_rbsp_data_in_pps(h, pps)) {
699 pps->transform_8x8_mode = get_bits1(&h->gb);
700 decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0,
701 pps->scaling_matrix4, pps->scaling_matrix8);
702 // second_chroma_qp_index_offset
703 pps->chroma_qp_index_offset[1] = get_se_golomb(&h->gb);
705 pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
708 build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
709 sps->bit_depth_luma);
710 build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
711 sps->bit_depth_luma);
712 if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
713 pps->chroma_qp_diff = 1;
715 if (h->avctx->debug & FF_DEBUG_PICT_INFO) {
716 av_log(h->avctx, AV_LOG_DEBUG,
717 "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
719 pps->cabac ? "CABAC" : "CAVLC",
720 pps->slice_group_count,
721 pps->ref_count[0], pps->ref_count[1],
722 pps->weighted_pred ? "weighted" : "",
723 pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
724 pps->deblocking_filter_parameters_present ? "LPAR" : "",
725 pps->constrained_intra_pred ? "CONSTR" : "",
726 pps->redundant_pic_cnt_present ? "REDU" : "",
727 pps->transform_8x8_mode ? "8x8DCT" : "");
730 av_free(h->pps_buffers[pps_id]);
731 h->pps_buffers[pps_id] = pps;