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 av_log(h->avctx, AV_LOG_ERROR,
339 "chroma_format_idc %u out of range\n",
340 sps->chroma_format_idc);
342 } else if (sps->chroma_format_idc == 3) {
343 sps->residual_color_transform_flag = get_bits1(&h->gb);
345 sps->bit_depth_luma = get_ue_golomb(&h->gb) + 8;
346 sps->bit_depth_chroma = get_ue_golomb(&h->gb) + 8;
347 if (sps->bit_depth_chroma != sps->bit_depth_luma) {
348 avpriv_request_sample(h->avctx,
349 "Different chroma and luma bit depth");
352 sps->transform_bypass = get_bits1(&h->gb);
353 decode_scaling_matrices(h, sps, NULL, 1,
354 sps->scaling_matrix4, sps->scaling_matrix8);
356 sps->chroma_format_idc = 1;
357 sps->bit_depth_luma = 8;
358 sps->bit_depth_chroma = 8;
361 log2_max_frame_num_minus4 = get_ue_golomb(&h->gb);
362 if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
363 log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
364 av_log(h->avctx, AV_LOG_ERROR,
365 "log2_max_frame_num_minus4 out of range (0-12): %d\n",
366 log2_max_frame_num_minus4);
369 sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
371 sps->poc_type = get_ue_golomb_31(&h->gb);
373 if (sps->poc_type == 0) { // FIXME #define
374 sps->log2_max_poc_lsb = get_ue_golomb(&h->gb) + 4;
375 } else if (sps->poc_type == 1) { // FIXME #define
376 sps->delta_pic_order_always_zero_flag = get_bits1(&h->gb);
377 sps->offset_for_non_ref_pic = get_se_golomb(&h->gb);
378 sps->offset_for_top_to_bottom_field = get_se_golomb(&h->gb);
379 sps->poc_cycle_length = get_ue_golomb(&h->gb);
381 if ((unsigned)sps->poc_cycle_length >=
382 FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
383 av_log(h->avctx, AV_LOG_ERROR,
384 "poc_cycle_length overflow %u\n", sps->poc_cycle_length);
388 for (i = 0; i < sps->poc_cycle_length; i++)
389 sps->offset_for_ref_frame[i] = get_se_golomb(&h->gb);
390 } else if (sps->poc_type != 2) {
391 av_log(h->avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
395 sps->ref_frame_count = get_ue_golomb_31(&h->gb);
396 if (sps->ref_frame_count > MAX_PICTURE_COUNT - 2 ||
397 sps->ref_frame_count >= 32U) {
398 av_log(h->avctx, AV_LOG_ERROR,
399 "too many reference frames %d\n", sps->ref_frame_count);
402 sps->gaps_in_frame_num_allowed_flag = get_bits1(&h->gb);
403 sps->mb_width = get_ue_golomb(&h->gb) + 1;
404 sps->mb_height = get_ue_golomb(&h->gb) + 1;
405 if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
406 (unsigned)sps->mb_height >= INT_MAX / 16 ||
407 av_image_check_size(16 * sps->mb_width,
408 16 * sps->mb_height, 0, h->avctx)) {
409 av_log(h->avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
413 sps->frame_mbs_only_flag = get_bits1(&h->gb);
414 if (!sps->frame_mbs_only_flag)
415 sps->mb_aff = get_bits1(&h->gb);
419 sps->direct_8x8_inference_flag = get_bits1(&h->gb);
420 if (!sps->frame_mbs_only_flag && !sps->direct_8x8_inference_flag) {
421 av_log(h->avctx, AV_LOG_ERROR,
422 "This stream was generated by a broken encoder, invalid 8x8 inference\n");
426 #ifndef ALLOW_INTERLACE
428 av_log(h->avctx, AV_LOG_ERROR,
429 "MBAFF support not included; enable it at compile-time.\n");
431 sps->crop = get_bits1(&h->gb);
433 int crop_left = get_ue_golomb(&h->gb);
434 int crop_right = get_ue_golomb(&h->gb);
435 int crop_top = get_ue_golomb(&h->gb);
436 int crop_bottom = get_ue_golomb(&h->gb);
438 if (h->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) {
439 av_log(h->avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
440 "values are l:%u r:%u t:%u b:%u\n",
441 crop_left, crop_right, crop_top, crop_bottom);
446 sps->crop_bottom = 0;
448 int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
449 int hsub = (sps->chroma_format_idc == 1 ||
450 sps->chroma_format_idc == 2) ? 1 : 0;
451 int step_x = 1 << hsub;
452 int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
454 if (crop_left & (0x1F >> (sps->bit_depth_luma > 8)) &&
455 !(h->avctx->flags & CODEC_FLAG_UNALIGNED)) {
456 crop_left &= ~(0x1F >> (sps->bit_depth_luma > 8));
457 av_log(h->avctx, AV_LOG_WARNING,
458 "Reducing left cropping to %d "
459 "chroma samples to preserve alignment.\n",
463 sps->crop_left = crop_left * step_x;
464 sps->crop_right = crop_right * step_x;
465 sps->crop_top = crop_top * step_y;
466 sps->crop_bottom = crop_bottom * step_y;
476 sps->vui_parameters_present_flag = get_bits1(&h->gb);
477 if (sps->vui_parameters_present_flag) {
478 int ret = decode_vui_parameters(h, sps);
479 if (ret < 0 && h->avctx->err_recognition & AV_EF_EXPLODE)
486 if (h->avctx->debug & FF_DEBUG_PICT_INFO) {
487 static const char csp[4][5] = { "Gray", "420", "422", "444" };
488 av_log(h->avctx, AV_LOG_DEBUG,
489 "sps:%u profile:%d/%d poc:%d ref:%d %dx%d %s %s crop:%d/%d/%d/%d %s %s %d/%d\n",
490 sps_id, sps->profile_idc, sps->level_idc,
492 sps->ref_frame_count,
493 sps->mb_width, sps->mb_height,
494 sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
495 sps->direct_8x8_inference_flag ? "8B8" : "",
496 sps->crop_left, sps->crop_right,
497 sps->crop_top, sps->crop_bottom,
498 sps->vui_parameters_present_flag ? "VUI" : "",
499 csp[sps->chroma_format_idc],
500 sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
501 sps->timing_info_present_flag ? sps->time_scale : 0);
505 av_free(h->sps_buffers[sps_id]);
506 h->sps_buffers[sps_id] = sps;
516 static void build_qp_table(PPS *pps, int t, int index, const int depth)
519 const int max_qp = 51 + 6 * (depth - 8);
520 for (i = 0; i < max_qp + 1; i++)
521 pps->chroma_qp_table[t][i] =
522 ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
525 int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length)
527 unsigned int pps_id = get_ue_golomb(&h->gb);
529 const int qp_bd_offset = 6 * (h->sps.bit_depth_luma - 8);
532 if (pps_id >= MAX_PPS_COUNT) {
533 av_log(h->avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
534 return AVERROR_INVALIDDATA;
535 } else if (h->sps.bit_depth_luma > 10) {
536 av_log(h->avctx, AV_LOG_ERROR,
537 "Unimplemented luma bit depth=%d (max=10)\n",
538 h->sps.bit_depth_luma);
539 return AVERROR_PATCHWELCOME;
542 pps = av_mallocz(sizeof(PPS));
544 return AVERROR(ENOMEM);
545 pps->sps_id = get_ue_golomb_31(&h->gb);
546 if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
547 h->sps_buffers[pps->sps_id] == NULL) {
548 av_log(h->avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
552 pps->cabac = get_bits1(&h->gb);
553 pps->pic_order_present = get_bits1(&h->gb);
554 pps->slice_group_count = get_ue_golomb(&h->gb) + 1;
555 if (pps->slice_group_count > 1) {
556 pps->mb_slice_group_map_type = get_ue_golomb(&h->gb);
557 av_log(h->avctx, AV_LOG_ERROR, "FMO not supported\n");
558 switch (pps->mb_slice_group_map_type) {
561 | for (i = 0; i <= num_slice_groups_minus1; i++) | | |
562 | run_length[i] |1 |ue(v) |
567 | for (i = 0; i < num_slice_groups_minus1; i++) { | | |
568 | top_left_mb[i] |1 |ue(v) |
569 | bottom_right_mb[i] |1 |ue(v) |
577 | slice_group_change_direction_flag |1 |u(1) |
578 | slice_group_change_rate_minus1 |1 |ue(v) |
583 | slice_group_id_cnt_minus1 |1 |ue(v) |
584 | for (i = 0; i <= slice_group_id_cnt_minus1; i++)| | |
585 | slice_group_id[i] |1 |u(v) |
590 pps->ref_count[0] = get_ue_golomb(&h->gb) + 1;
591 pps->ref_count[1] = get_ue_golomb(&h->gb) + 1;
592 if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
593 av_log(h->avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
597 pps->weighted_pred = get_bits1(&h->gb);
598 pps->weighted_bipred_idc = get_bits(&h->gb, 2);
599 pps->init_qp = get_se_golomb(&h->gb) + 26 + qp_bd_offset;
600 pps->init_qs = get_se_golomb(&h->gb) + 26 + qp_bd_offset;
601 pps->chroma_qp_index_offset[0] = get_se_golomb(&h->gb);
602 pps->deblocking_filter_parameters_present = get_bits1(&h->gb);
603 pps->constrained_intra_pred = get_bits1(&h->gb);
604 pps->redundant_pic_cnt_present = get_bits1(&h->gb);
606 pps->transform_8x8_mode = 0;
607 // contents of sps/pps can change even if id doesn't, so reinit
608 h->dequant_coeff_pps = -1;
609 memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4,
610 sizeof(pps->scaling_matrix4));
611 memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8,
612 sizeof(pps->scaling_matrix8));
614 bits_left = bit_length - get_bits_count(&h->gb);
615 if (bits_left && (bits_left > 8 ||
616 show_bits(&h->gb, bits_left) != 1 << (bits_left - 1))) {
617 pps->transform_8x8_mode = get_bits1(&h->gb);
618 decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0,
619 pps->scaling_matrix4, pps->scaling_matrix8);
620 // second_chroma_qp_index_offset
621 pps->chroma_qp_index_offset[1] = get_se_golomb(&h->gb);
623 pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
626 build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
627 h->sps.bit_depth_luma);
628 build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
629 h->sps.bit_depth_luma);
630 if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
631 pps->chroma_qp_diff = 1;
633 if (h->avctx->debug & FF_DEBUG_PICT_INFO) {
634 av_log(h->avctx, AV_LOG_DEBUG,
635 "pps:%u sps:%u %s slice_groups:%d ref:%d/%d %s qp:%d/%d/%d/%d %s %s %s %s\n",
637 pps->cabac ? "CABAC" : "CAVLC",
638 pps->slice_group_count,
639 pps->ref_count[0], pps->ref_count[1],
640 pps->weighted_pred ? "weighted" : "",
641 pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
642 pps->deblocking_filter_parameters_present ? "LPAR" : "",
643 pps->constrained_intra_pred ? "CONSTR" : "",
644 pps->redundant_pic_cnt_present ? "REDU" : "",
645 pps->transform_8x8_mode ? "8x8DCT" : "");
648 av_free(h->pps_buffers[pps_id]);
649 h->pps_buffers[pps_id] = pps;