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 Libav.
7 * Libav 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 * Libav 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 Libav; 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>
28 #include "libavutil/imgutils.h"
32 #include "h264data.h" //FIXME FIXME FIXME (just for zigzag_scan)
35 #define MAX_LOG2_MAX_FRAME_NUM (12 + 4)
36 #define MIN_LOG2_MAX_FRAME_NUM 4
38 static const AVRational pixel_aspect[17] = {
58 #define QP(qP, depth) ((qP) + 6 * ((depth) - 8))
60 #define CHROMA_QP_TABLE_END(d) \
61 QP(0, d), QP(1, d), QP(2, d), QP(3, d), QP(4, d), QP(5, d), \
62 QP(6, d), QP(7, d), QP(8, d), QP(9, d), QP(10, d), QP(11, d), \
63 QP(12, d), QP(13, d), QP(14, d), QP(15, d), QP(16, d), QP(17, d), \
64 QP(18, d), QP(19, d), QP(20, d), QP(21, d), QP(22, d), QP(23, d), \
65 QP(24, d), QP(25, d), QP(26, d), QP(27, d), QP(28, d), QP(29, d), \
66 QP(29, d), QP(30, d), QP(31, d), QP(32, d), QP(32, d), QP(33, d), \
67 QP(34, d), QP(34, d), QP(35, d), QP(35, d), QP(36, d), QP(36, d), \
68 QP(37, d), QP(37, d), QP(37, d), QP(38, d), QP(38, d), QP(38, d), \
69 QP(39, d), QP(39, d), QP(39, d), QP(39, d)
71 const uint8_t ff_h264_chroma_qp[3][QP_MAX_NUM + 1] = {
72 { CHROMA_QP_TABLE_END(8) },
74 CHROMA_QP_TABLE_END(9) },
77 CHROMA_QP_TABLE_END(10) },
80 static const uint8_t default_scaling4[2][16] = {
81 { 6, 13, 20, 28, 13, 20, 28, 32,
82 20, 28, 32, 37, 28, 32, 37, 42 },
83 { 10, 14, 20, 24, 14, 20, 24, 27,
84 20, 24, 27, 30, 24, 27, 30, 34 }
87 static const uint8_t default_scaling8[2][64] = {
88 { 6, 10, 13, 16, 18, 23, 25, 27,
89 10, 11, 16, 18, 23, 25, 27, 29,
90 13, 16, 18, 23, 25, 27, 29, 31,
91 16, 18, 23, 25, 27, 29, 31, 33,
92 18, 23, 25, 27, 29, 31, 33, 36,
93 23, 25, 27, 29, 31, 33, 36, 38,
94 25, 27, 29, 31, 33, 36, 38, 40,
95 27, 29, 31, 33, 36, 38, 40, 42 },
96 { 9, 13, 15, 17, 19, 21, 22, 24,
97 13, 13, 17, 19, 21, 22, 24, 25,
98 15, 17, 19, 21, 22, 24, 25, 27,
99 17, 19, 21, 22, 24, 25, 27, 28,
100 19, 21, 22, 24, 25, 27, 28, 30,
101 21, 22, 24, 25, 27, 28, 30, 32,
102 22, 24, 25, 27, 28, 30, 32, 33,
103 24, 25, 27, 28, 30, 32, 33, 35 }
106 static inline int decode_hrd_parameters(H264Context *h, SPS *sps)
109 cpb_count = get_ue_golomb_31(&h->gb) + 1;
111 if (cpb_count > 32U) {
112 av_log(h->avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
113 return AVERROR_INVALIDDATA;
116 get_bits(&h->gb, 4); /* bit_rate_scale */
117 get_bits(&h->gb, 4); /* cpb_size_scale */
118 for (i = 0; i < cpb_count; i++) {
119 get_ue_golomb_long(&h->gb); /* bit_rate_value_minus1 */
120 get_ue_golomb_long(&h->gb); /* cpb_size_value_minus1 */
121 get_bits1(&h->gb); /* cbr_flag */
123 sps->initial_cpb_removal_delay_length = get_bits(&h->gb, 5) + 1;
124 sps->cpb_removal_delay_length = get_bits(&h->gb, 5) + 1;
125 sps->dpb_output_delay_length = get_bits(&h->gb, 5) + 1;
126 sps->time_offset_length = get_bits(&h->gb, 5);
127 sps->cpb_cnt = cpb_count;
131 static inline int decode_vui_parameters(H264Context *h, SPS *sps)
133 int aspect_ratio_info_present_flag;
134 unsigned int aspect_ratio_idc;
136 aspect_ratio_info_present_flag = get_bits1(&h->gb);
138 if (aspect_ratio_info_present_flag) {
139 aspect_ratio_idc = get_bits(&h->gb, 8);
140 if (aspect_ratio_idc == EXTENDED_SAR) {
141 sps->sar.num = get_bits(&h->gb, 16);
142 sps->sar.den = get_bits(&h->gb, 16);
143 } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(pixel_aspect)) {
144 sps->sar = pixel_aspect[aspect_ratio_idc];
146 av_log(h->avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
147 return AVERROR_INVALIDDATA;
154 if (get_bits1(&h->gb)) /* overscan_info_present_flag */
155 get_bits1(&h->gb); /* overscan_appropriate_flag */
157 sps->video_signal_type_present_flag = get_bits1(&h->gb);
158 if (sps->video_signal_type_present_flag) {
159 get_bits(&h->gb, 3); /* video_format */
160 sps->full_range = get_bits1(&h->gb); /* video_full_range_flag */
162 sps->colour_description_present_flag = get_bits1(&h->gb);
163 if (sps->colour_description_present_flag) {
164 sps->color_primaries = get_bits(&h->gb, 8); /* colour_primaries */
165 sps->color_trc = get_bits(&h->gb, 8); /* transfer_characteristics */
166 sps->colorspace = get_bits(&h->gb, 8); /* matrix_coefficients */
167 if (sps->color_primaries >= AVCOL_PRI_NB)
168 sps->color_primaries = AVCOL_PRI_UNSPECIFIED;
169 if (sps->color_trc >= AVCOL_TRC_NB)
170 sps->color_trc = AVCOL_TRC_UNSPECIFIED;
171 if (sps->colorspace >= AVCOL_SPC_NB)
172 sps->colorspace = AVCOL_SPC_UNSPECIFIED;
176 /* chroma_location_info_present_flag */
177 if (get_bits1(&h->gb)) {
178 /* chroma_sample_location_type_top_field */
179 h->avctx->chroma_sample_location = get_ue_golomb(&h->gb) + 1;
180 get_ue_golomb(&h->gb); /* chroma_sample_location_type_bottom_field */
183 sps->timing_info_present_flag = get_bits1(&h->gb);
184 if (sps->timing_info_present_flag) {
185 sps->num_units_in_tick = get_bits_long(&h->gb, 32);
186 sps->time_scale = get_bits_long(&h->gb, 32);
187 if (!sps->num_units_in_tick || !sps->time_scale) {
188 av_log(h->avctx, AV_LOG_ERROR,
189 "time_scale/num_units_in_tick invalid or unsupported (%d/%d)\n",
190 sps->time_scale, sps->num_units_in_tick);
191 return AVERROR_INVALIDDATA;
193 sps->fixed_frame_rate_flag = get_bits1(&h->gb);
196 sps->nal_hrd_parameters_present_flag = get_bits1(&h->gb);
197 if (sps->nal_hrd_parameters_present_flag)
198 if (decode_hrd_parameters(h, sps) < 0)
199 return AVERROR_INVALIDDATA;
200 sps->vcl_hrd_parameters_present_flag = get_bits1(&h->gb);
201 if (sps->vcl_hrd_parameters_present_flag)
202 if (decode_hrd_parameters(h, sps) < 0)
203 return AVERROR_INVALIDDATA;
204 if (sps->nal_hrd_parameters_present_flag ||
205 sps->vcl_hrd_parameters_present_flag)
206 get_bits1(&h->gb); /* low_delay_hrd_flag */
207 sps->pic_struct_present_flag = get_bits1(&h->gb);
209 sps->bitstream_restriction_flag = get_bits1(&h->gb);
210 if (sps->bitstream_restriction_flag) {
211 get_bits1(&h->gb); /* motion_vectors_over_pic_boundaries_flag */
212 get_ue_golomb(&h->gb); /* max_bytes_per_pic_denom */
213 get_ue_golomb(&h->gb); /* max_bits_per_mb_denom */
214 get_ue_golomb(&h->gb); /* log2_max_mv_length_horizontal */
215 get_ue_golomb(&h->gb); /* log2_max_mv_length_vertical */
216 sps->num_reorder_frames = get_ue_golomb(&h->gb);
217 get_ue_golomb(&h->gb); /*max_dec_frame_buffering*/
219 if (get_bits_left(&h->gb) < 0) {
220 sps->num_reorder_frames = 0;
221 sps->bitstream_restriction_flag = 0;
224 if (sps->num_reorder_frames > 16U
225 /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
226 av_log(h->avctx, AV_LOG_ERROR,
227 "Clipping illegal num_reorder_frames %d\n",
228 sps->num_reorder_frames);
229 sps->num_reorder_frames = 16;
230 return AVERROR_INVALIDDATA;
233 if (get_bits_left(&h->gb) < 0) {
234 av_log(h->avctx, AV_LOG_ERROR,
235 "Overread VUI by %d bits\n", -get_bits_left(&h->gb));
236 return AVERROR_INVALIDDATA;
242 static void decode_scaling_list(H264Context *h, uint8_t *factors, int size,
243 const uint8_t *jvt_list,
244 const uint8_t *fallback_list)
246 int i, last = 8, next = 8;
247 const uint8_t *scan = size == 16 ? zigzag_scan : ff_zigzag_direct;
248 if (!get_bits1(&h->gb)) /* matrix not written, we use the predicted one */
249 memcpy(factors, fallback_list, size * sizeof(uint8_t));
251 for (i = 0; i < size; i++) {
253 next = (last + get_se_golomb(&h->gb)) & 0xff;
254 if (!i && !next) { /* matrix not written, we use the preset one */
255 memcpy(factors, jvt_list, size * sizeof(uint8_t));
258 last = factors[scan[i]] = next ? next : last;
262 static void decode_scaling_matrices(H264Context *h, SPS *sps,
263 PPS *pps, int is_sps,
264 uint8_t(*scaling_matrix4)[16],
265 uint8_t(*scaling_matrix8)[64])
267 int fallback_sps = !is_sps && sps->scaling_matrix_present;
268 const uint8_t *fallback[4] = {
269 fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
270 fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
271 fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
272 fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
274 if (get_bits1(&h->gb)) {
275 sps->scaling_matrix_present |= is_sps;
276 decode_scaling_list(h, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
277 decode_scaling_list(h, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
278 decode_scaling_list(h, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
279 decode_scaling_list(h, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
280 decode_scaling_list(h, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
281 decode_scaling_list(h, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
282 if (is_sps || pps->transform_8x8_mode) {
283 decode_scaling_list(h, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
284 if (sps->chroma_format_idc == 3) {
285 decode_scaling_list(h, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
286 decode_scaling_list(h, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
288 decode_scaling_list(h, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
289 if (sps->chroma_format_idc == 3) {
290 decode_scaling_list(h, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
291 decode_scaling_list(h, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
297 int ff_h264_decode_seq_parameter_set(H264Context *h)
299 int profile_idc, level_idc, constraint_set_flags = 0;
301 int i, log2_max_frame_num_minus4;
304 profile_idc = get_bits(&h->gb, 8);
305 constraint_set_flags |= get_bits1(&h->gb) << 0; // constraint_set0_flag
306 constraint_set_flags |= get_bits1(&h->gb) << 1; // constraint_set1_flag
307 constraint_set_flags |= get_bits1(&h->gb) << 2; // constraint_set2_flag
308 constraint_set_flags |= get_bits1(&h->gb) << 3; // constraint_set3_flag
309 get_bits(&h->gb, 4); // reserved
310 level_idc = get_bits(&h->gb, 8);
311 sps_id = get_ue_golomb_31(&h->gb);
313 if (sps_id >= MAX_SPS_COUNT) {
314 av_log(h->avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
315 return AVERROR_INVALIDDATA;
317 sps = av_mallocz(sizeof(SPS));
319 return AVERROR(ENOMEM);
321 sps->sps_id = sps_id;
322 sps->time_offset_length = 24;
323 sps->profile_idc = profile_idc;
324 sps->constraint_set_flags = constraint_set_flags;
325 sps->level_idc = level_idc;
327 memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
328 memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
329 sps->scaling_matrix_present = 0;
331 if (sps->profile_idc == 100 || sps->profile_idc == 110 ||
332 sps->profile_idc == 122 || sps->profile_idc == 244 ||
333 sps->profile_idc == 44 || sps->profile_idc == 83 ||
334 sps->profile_idc == 86 || sps->profile_idc == 118 ||
335 sps->profile_idc == 128 || sps->profile_idc == 144) {
336 sps->chroma_format_idc = get_ue_golomb_31(&h->gb);
337 if (sps->chroma_format_idc > 3) {
338 avpriv_request_sample(h->avctx, "chroma_format_idc %u",
339 sps->chroma_format_idc);
341 } else if (sps->chroma_format_idc == 3) {
342 sps->residual_color_transform_flag = get_bits1(&h->gb);
344 sps->bit_depth_luma = get_ue_golomb(&h->gb) + 8;
345 sps->bit_depth_chroma = get_ue_golomb(&h->gb) + 8;
346 if (sps->bit_depth_chroma != sps->bit_depth_luma) {
347 avpriv_request_sample(h->avctx,
348 "Different chroma and luma bit depth");
351 sps->transform_bypass = get_bits1(&h->gb);
352 decode_scaling_matrices(h, sps, NULL, 1,
353 sps->scaling_matrix4, sps->scaling_matrix8);
355 sps->chroma_format_idc = 1;
356 sps->bit_depth_luma = 8;
357 sps->bit_depth_chroma = 8;
360 log2_max_frame_num_minus4 = get_ue_golomb(&h->gb);
361 if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
362 log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
363 av_log(h->avctx, AV_LOG_ERROR,
364 "log2_max_frame_num_minus4 out of range (0-12): %d\n",
365 log2_max_frame_num_minus4);
368 sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
370 sps->poc_type = get_ue_golomb_31(&h->gb);
372 if (sps->poc_type == 0) { // FIXME #define
373 sps->log2_max_poc_lsb = get_ue_golomb(&h->gb) + 4;
374 } else if (sps->poc_type == 1) { // FIXME #define
375 sps->delta_pic_order_always_zero_flag = get_bits1(&h->gb);
376 sps->offset_for_non_ref_pic = get_se_golomb(&h->gb);
377 sps->offset_for_top_to_bottom_field = get_se_golomb(&h->gb);
378 sps->poc_cycle_length = get_ue_golomb(&h->gb);
380 if ((unsigned)sps->poc_cycle_length >=
381 FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
382 av_log(h->avctx, AV_LOG_ERROR,
383 "poc_cycle_length overflow %u\n", sps->poc_cycle_length);
387 for (i = 0; i < sps->poc_cycle_length; i++)
388 sps->offset_for_ref_frame[i] = get_se_golomb(&h->gb);
389 } else if (sps->poc_type != 2) {
390 av_log(h->avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
394 sps->ref_frame_count = get_ue_golomb_31(&h->gb);
395 if (sps->ref_frame_count > MAX_PICTURE_COUNT - 2 ||
396 sps->ref_frame_count >= 32U) {
397 av_log(h->avctx, AV_LOG_ERROR,
398 "too many reference frames %d\n", sps->ref_frame_count);
401 sps->gaps_in_frame_num_allowed_flag = get_bits1(&h->gb);
402 sps->mb_width = get_ue_golomb(&h->gb) + 1;
403 sps->mb_height = get_ue_golomb(&h->gb) + 1;
404 if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
405 (unsigned)sps->mb_height >= INT_MAX / 16 ||
406 av_image_check_size(16 * sps->mb_width,
407 16 * sps->mb_height, 0, h->avctx)) {
408 av_log(h->avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
412 sps->frame_mbs_only_flag = get_bits1(&h->gb);
413 if (!sps->frame_mbs_only_flag)
414 sps->mb_aff = get_bits1(&h->gb);
418 sps->direct_8x8_inference_flag = get_bits1(&h->gb);
419 if (!sps->frame_mbs_only_flag && !sps->direct_8x8_inference_flag) {
420 av_log(h->avctx, AV_LOG_ERROR,
421 "This stream was generated by a broken encoder, invalid 8x8 inference\n");
425 #ifndef ALLOW_INTERLACE
427 av_log(h->avctx, AV_LOG_ERROR,
428 "MBAFF support not included; enable it at compile-time.\n");
430 sps->crop = get_bits1(&h->gb);
432 int crop_left = get_ue_golomb(&h->gb);
433 int crop_right = get_ue_golomb(&h->gb);
434 int crop_top = get_ue_golomb(&h->gb);
435 int crop_bottom = get_ue_golomb(&h->gb);
437 if (h->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) {
438 av_log(h->avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
439 "values are l:%u r:%u t:%u b:%u\n",
440 crop_left, crop_right, crop_top, crop_bottom);
445 sps->crop_bottom = 0;
447 int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
448 int hsub = (sps->chroma_format_idc == 1 ||
449 sps->chroma_format_idc == 2) ? 1 : 0;
450 int step_x = 1 << hsub;
451 int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
453 if (crop_left & (0x1F >> (sps->bit_depth_luma > 8)) &&
454 !(h->avctx->flags & CODEC_FLAG_UNALIGNED)) {
455 crop_left &= ~(0x1F >> (sps->bit_depth_luma > 8));
456 av_log(h->avctx, AV_LOG_WARNING,
457 "Reducing left cropping to %d "
458 "chroma samples to preserve alignment.\n",
462 sps->crop_left = crop_left * step_x;
463 sps->crop_right = crop_right * step_x;
464 sps->crop_top = crop_top * step_y;
465 sps->crop_bottom = crop_bottom * step_y;
475 sps->vui_parameters_present_flag = get_bits1(&h->gb);
476 if (sps->vui_parameters_present_flag) {
477 int ret = decode_vui_parameters(h, sps);
478 if (ret < 0 && h->avctx->err_recognition & AV_EF_EXPLODE)
485 if (h->avctx->debug & FF_DEBUG_PICT_INFO) {
486 static const char csp[4][5] = { "Gray", "420", "422", "444" };
487 av_log(h->avctx, AV_LOG_DEBUG,
488 "sps:%u profile:%d/%d poc:%d ref:%d %dx%d %s %s crop:%d/%d/%d/%d %s %s %d/%d\n",
489 sps_id, sps->profile_idc, sps->level_idc,
491 sps->ref_frame_count,
492 sps->mb_width, sps->mb_height,
493 sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
494 sps->direct_8x8_inference_flag ? "8B8" : "",
495 sps->crop_left, sps->crop_right,
496 sps->crop_top, sps->crop_bottom,
497 sps->vui_parameters_present_flag ? "VUI" : "",
498 csp[sps->chroma_format_idc],
499 sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
500 sps->timing_info_present_flag ? sps->time_scale : 0);
504 av_free(h->sps_buffers[sps_id]);
505 h->sps_buffers[sps_id] = sps;
515 static void build_qp_table(PPS *pps, int t, int index, const int depth)
518 const int max_qp = 51 + 6 * (depth - 8);
519 for (i = 0; i < max_qp + 1; i++)
520 pps->chroma_qp_table[t][i] =
521 ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
524 int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length)
526 unsigned int pps_id = get_ue_golomb(&h->gb);
528 const int qp_bd_offset = 6 * (h->sps.bit_depth_luma - 8);
531 if (pps_id >= MAX_PPS_COUNT) {
532 av_log(h->avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
533 return AVERROR_INVALIDDATA;
534 } else if (h->sps.bit_depth_luma > 10) {
535 av_log(h->avctx, AV_LOG_ERROR,
536 "Unimplemented luma bit depth=%d (max=10)\n",
537 h->sps.bit_depth_luma);
538 return AVERROR_PATCHWELCOME;
541 pps = av_mallocz(sizeof(PPS));
543 return AVERROR(ENOMEM);
544 pps->sps_id = get_ue_golomb_31(&h->gb);
545 if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
546 h->sps_buffers[pps->sps_id] == NULL) {
547 av_log(h->avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
551 pps->cabac = get_bits1(&h->gb);
552 pps->pic_order_present = get_bits1(&h->gb);
553 pps->slice_group_count = get_ue_golomb(&h->gb) + 1;
554 if (pps->slice_group_count > 1) {
555 pps->mb_slice_group_map_type = get_ue_golomb(&h->gb);
556 av_log(h->avctx, AV_LOG_ERROR, "FMO not supported\n");
557 switch (pps->mb_slice_group_map_type) {
560 | for (i = 0; i <= num_slice_groups_minus1; i++) | | |
561 | run_length[i] |1 |ue(v) |
566 | for (i = 0; i < num_slice_groups_minus1; i++) { | | |
567 | top_left_mb[i] |1 |ue(v) |
568 | bottom_right_mb[i] |1 |ue(v) |
576 | slice_group_change_direction_flag |1 |u(1) |
577 | slice_group_change_rate_minus1 |1 |ue(v) |
582 | slice_group_id_cnt_minus1 |1 |ue(v) |
583 | for (i = 0; i <= slice_group_id_cnt_minus1; i++)| | |
584 | slice_group_id[i] |1 |u(v) |
589 pps->ref_count[0] = get_ue_golomb(&h->gb) + 1;
590 pps->ref_count[1] = get_ue_golomb(&h->gb) + 1;
591 if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
592 av_log(h->avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
596 pps->weighted_pred = get_bits1(&h->gb);
597 pps->weighted_bipred_idc = get_bits(&h->gb, 2);
598 pps->init_qp = get_se_golomb(&h->gb) + 26 + qp_bd_offset;
599 pps->init_qs = get_se_golomb(&h->gb) + 26 + qp_bd_offset;
600 pps->chroma_qp_index_offset[0] = get_se_golomb(&h->gb);
601 pps->deblocking_filter_parameters_present = get_bits1(&h->gb);
602 pps->constrained_intra_pred = get_bits1(&h->gb);
603 pps->redundant_pic_cnt_present = get_bits1(&h->gb);
605 pps->transform_8x8_mode = 0;
606 // contents of sps/pps can change even if id doesn't, so reinit
607 h->dequant_coeff_pps = -1;
608 memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4,
609 sizeof(pps->scaling_matrix4));
610 memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8,
611 sizeof(pps->scaling_matrix8));
613 bits_left = bit_length - get_bits_count(&h->gb);
614 if (bits_left && (bits_left > 8 ||
615 show_bits(&h->gb, bits_left) != 1 << (bits_left - 1))) {
616 pps->transform_8x8_mode = get_bits1(&h->gb);
617 decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0,
618 pps->scaling_matrix4, pps->scaling_matrix8);
619 // second_chroma_qp_index_offset
620 pps->chroma_qp_index_offset[1] = get_se_golomb(&h->gb);
622 pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
625 build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
626 h->sps.bit_depth_luma);
627 build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
628 h->sps.bit_depth_luma);
629 if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
630 pps->chroma_qp_diff = 1;
632 if (h->avctx->debug & FF_DEBUG_PICT_INFO) {
633 av_log(h->avctx, AV_LOG_DEBUG,
634 "pps:%u sps:%u %s slice_groups:%d ref:%d/%d %s qp:%d/%d/%d/%d %s %s %s %s\n",
636 pps->cabac ? "CABAC" : "CAVLC",
637 pps->slice_group_count,
638 pps->ref_count[0], pps->ref_count[1],
639 pps->weighted_pred ? "weighted" : "",
640 pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
641 pps->deblocking_filter_parameters_present ? "LPAR" : "",
642 pps->constrained_intra_pred ? "CONSTR" : "",
643 pps->redundant_pic_cnt_present ? "REDU" : "",
644 pps->transform_8x8_mode ? "8x8DCT" : "");
647 av_free(h->pps_buffers[pps_id]);
648 h->pps_buffers[pps_id] = pps;