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>
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 AVRational pixel_aspect[17] = {
61 static const uint8_t default_scaling4[2][16] = {
62 { 6, 13, 20, 28, 13, 20, 28, 32,
63 20, 28, 32, 37, 28, 32, 37, 42 },
64 { 10, 14, 20, 24, 14, 20, 24, 27,
65 20, 24, 27, 30, 24, 27, 30, 34 }
68 static const uint8_t default_scaling8[2][64] = {
69 { 6, 10, 13, 16, 18, 23, 25, 27,
70 10, 11, 16, 18, 23, 25, 27, 29,
71 13, 16, 18, 23, 25, 27, 29, 31,
72 16, 18, 23, 25, 27, 29, 31, 33,
73 18, 23, 25, 27, 29, 31, 33, 36,
74 23, 25, 27, 29, 31, 33, 36, 38,
75 25, 27, 29, 31, 33, 36, 38, 40,
76 27, 29, 31, 33, 36, 38, 40, 42 },
77 { 9, 13, 15, 17, 19, 21, 22, 24,
78 13, 13, 17, 19, 21, 22, 24, 25,
79 15, 17, 19, 21, 22, 24, 25, 27,
80 17, 19, 21, 22, 24, 25, 27, 28,
81 19, 21, 22, 24, 25, 27, 28, 30,
82 21, 22, 24, 25, 27, 28, 30, 32,
83 22, 24, 25, 27, 28, 30, 32, 33,
84 24, 25, 27, 28, 30, 32, 33, 35 }
87 /* maximum number of MBs in the DPB for a given level */
88 static const int level_max_dpb_mbs[][2] = {
107 static void remove_pps(H264ParamSets *s, int id)
109 if (s->pps_list[id] && s->pps == (const PPS*)s->pps_list[id]->data)
111 av_buffer_unref(&s->pps_list[id]);
114 static void remove_sps(H264ParamSets *s, int id)
117 if (s->sps_list[id]) {
118 if (s->sps == (SPS*)s->sps_list[id]->data)
121 /* drop all PPS that depend on this SPS */
122 for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
123 if (s->pps_list[i] && ((PPS*)s->pps_list[i]->data)->sps_id == id)
126 av_buffer_unref(&s->sps_list[id]);
129 static inline int decode_hrd_parameters(GetBitContext *gb, AVCodecContext *avctx,
133 cpb_count = get_ue_golomb_31(gb) + 1;
135 if (cpb_count > 32U) {
136 av_log(avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
137 return AVERROR_INVALIDDATA;
140 get_bits(gb, 4); /* bit_rate_scale */
141 get_bits(gb, 4); /* cpb_size_scale */
142 for (i = 0; i < cpb_count; i++) {
143 get_ue_golomb_long(gb); /* bit_rate_value_minus1 */
144 get_ue_golomb_long(gb); /* cpb_size_value_minus1 */
145 get_bits1(gb); /* cbr_flag */
147 sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1;
148 sps->cpb_removal_delay_length = get_bits(gb, 5) + 1;
149 sps->dpb_output_delay_length = get_bits(gb, 5) + 1;
150 sps->time_offset_length = get_bits(gb, 5);
151 sps->cpb_cnt = cpb_count;
155 static inline int decode_vui_parameters(GetBitContext *gb, AVCodecContext *avctx,
158 int aspect_ratio_info_present_flag;
159 unsigned int aspect_ratio_idc;
161 aspect_ratio_info_present_flag = get_bits1(gb);
163 if (aspect_ratio_info_present_flag) {
164 aspect_ratio_idc = get_bits(gb, 8);
165 if (aspect_ratio_idc == EXTENDED_SAR) {
166 sps->sar.num = get_bits(gb, 16);
167 sps->sar.den = get_bits(gb, 16);
168 } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(pixel_aspect)) {
169 sps->sar = pixel_aspect[aspect_ratio_idc];
171 av_log(avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
172 return AVERROR_INVALIDDATA;
179 if (get_bits1(gb)) /* overscan_info_present_flag */
180 get_bits1(gb); /* overscan_appropriate_flag */
182 sps->video_signal_type_present_flag = get_bits1(gb);
183 if (sps->video_signal_type_present_flag) {
184 get_bits(gb, 3); /* video_format */
185 sps->full_range = get_bits1(gb); /* video_full_range_flag */
187 sps->colour_description_present_flag = get_bits1(gb);
188 if (sps->colour_description_present_flag) {
189 sps->color_primaries = get_bits(gb, 8); /* colour_primaries */
190 sps->color_trc = get_bits(gb, 8); /* transfer_characteristics */
191 sps->colorspace = get_bits(gb, 8); /* matrix_coefficients */
192 if (sps->color_primaries >= AVCOL_PRI_NB)
193 sps->color_primaries = AVCOL_PRI_UNSPECIFIED;
194 if (sps->color_trc >= AVCOL_TRC_NB)
195 sps->color_trc = AVCOL_TRC_UNSPECIFIED;
196 if (sps->colorspace >= AVCOL_SPC_NB)
197 sps->colorspace = AVCOL_SPC_UNSPECIFIED;
201 /* chroma_location_info_present_flag */
203 /* chroma_sample_location_type_top_field */
204 avctx->chroma_sample_location = get_ue_golomb(gb) + 1;
205 get_ue_golomb(gb); /* chroma_sample_location_type_bottom_field */
208 sps->timing_info_present_flag = get_bits1(gb);
209 if (sps->timing_info_present_flag) {
210 sps->num_units_in_tick = get_bits_long(gb, 32);
211 sps->time_scale = get_bits_long(gb, 32);
212 if (!sps->num_units_in_tick || !sps->time_scale) {
213 av_log(avctx, AV_LOG_ERROR,
214 "time_scale/num_units_in_tick invalid or unsupported (%"PRIu32"/%"PRIu32")\n",
215 sps->time_scale, sps->num_units_in_tick);
216 return AVERROR_INVALIDDATA;
218 sps->fixed_frame_rate_flag = get_bits1(gb);
221 sps->nal_hrd_parameters_present_flag = get_bits1(gb);
222 if (sps->nal_hrd_parameters_present_flag)
223 if (decode_hrd_parameters(gb, avctx, sps) < 0)
224 return AVERROR_INVALIDDATA;
225 sps->vcl_hrd_parameters_present_flag = get_bits1(gb);
226 if (sps->vcl_hrd_parameters_present_flag)
227 if (decode_hrd_parameters(gb, avctx, sps) < 0)
228 return AVERROR_INVALIDDATA;
229 if (sps->nal_hrd_parameters_present_flag ||
230 sps->vcl_hrd_parameters_present_flag)
231 get_bits1(gb); /* low_delay_hrd_flag */
232 sps->pic_struct_present_flag = get_bits1(gb);
234 sps->bitstream_restriction_flag = get_bits1(gb);
235 if (sps->bitstream_restriction_flag) {
236 get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */
237 get_ue_golomb(gb); /* max_bytes_per_pic_denom */
238 get_ue_golomb(gb); /* max_bits_per_mb_denom */
239 get_ue_golomb(gb); /* log2_max_mv_length_horizontal */
240 get_ue_golomb(gb); /* log2_max_mv_length_vertical */
241 sps->num_reorder_frames = get_ue_golomb(gb);
242 get_ue_golomb(gb); /*max_dec_frame_buffering*/
244 if (get_bits_left(gb) < 0) {
245 sps->num_reorder_frames = 0;
246 sps->bitstream_restriction_flag = 0;
249 if (sps->num_reorder_frames > 16U
250 /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
251 av_log(avctx, AV_LOG_ERROR,
252 "Clipping illegal num_reorder_frames %d\n",
253 sps->num_reorder_frames);
254 sps->num_reorder_frames = 16;
255 return AVERROR_INVALIDDATA;
258 if (get_bits_left(gb) < 0) {
259 av_log(avctx, AV_LOG_ERROR,
260 "Overread VUI by %d bits\n", -get_bits_left(gb));
261 return AVERROR_INVALIDDATA;
267 static void decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
268 const uint8_t *jvt_list,
269 const uint8_t *fallback_list)
271 int i, last = 8, next = 8;
272 const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
273 if (!get_bits1(gb)) /* matrix not written, we use the predicted one */
274 memcpy(factors, fallback_list, size * sizeof(uint8_t));
276 for (i = 0; i < size; i++) {
278 next = (last + get_se_golomb(gb)) & 0xff;
279 if (!i && !next) { /* matrix not written, we use the preset one */
280 memcpy(factors, jvt_list, size * sizeof(uint8_t));
283 last = factors[scan[i]] = next ? next : last;
287 static void decode_scaling_matrices(GetBitContext *gb, SPS *sps,
288 PPS *pps, int is_sps,
289 uint8_t(*scaling_matrix4)[16],
290 uint8_t(*scaling_matrix8)[64])
292 int fallback_sps = !is_sps && sps->scaling_matrix_present;
293 const uint8_t *fallback[4] = {
294 fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
295 fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
296 fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
297 fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
300 sps->scaling_matrix_present |= is_sps;
301 decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
302 decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
303 decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
304 decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
305 decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
306 decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
307 if (is_sps || pps->transform_8x8_mode) {
308 decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
309 if (sps->chroma_format_idc == 3) {
310 decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
311 decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
313 decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
314 if (sps->chroma_format_idc == 3) {
315 decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
316 decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
322 int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
325 AVBufferRef *sps_buf;
326 int profile_idc, level_idc, constraint_set_flags = 0;
328 int i, log2_max_frame_num_minus4;
331 profile_idc = get_bits(gb, 8);
332 constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
333 constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
334 constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag
335 constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag
336 constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag
337 constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag
338 skip_bits(gb, 2); // reserved_zero_2bits
339 level_idc = get_bits(gb, 8);
340 sps_id = get_ue_golomb_31(gb);
342 if (sps_id >= MAX_SPS_COUNT) {
343 av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
344 return AVERROR_INVALIDDATA;
347 sps_buf = av_buffer_allocz(sizeof(*sps));
349 return AVERROR(ENOMEM);
350 sps = (SPS*)sps_buf->data;
352 sps->sps_id = sps_id;
353 sps->time_offset_length = 24;
354 sps->profile_idc = profile_idc;
355 sps->constraint_set_flags = constraint_set_flags;
356 sps->level_idc = level_idc;
358 memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
359 memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
360 sps->scaling_matrix_present = 0;
362 if (sps->profile_idc == 100 || // High profile
363 sps->profile_idc == 110 || // High10 profile
364 sps->profile_idc == 122 || // High422 profile
365 sps->profile_idc == 244 || // High444 Predictive profile
366 sps->profile_idc == 44 || // Cavlc444 profile
367 sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
368 sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
369 sps->profile_idc == 118 || // Stereo High profile (MVC)
370 sps->profile_idc == 128 || // Multiview High profile (MVC)
371 sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
372 sps->profile_idc == 144) { // old High444 profile
373 sps->chroma_format_idc = get_ue_golomb_31(gb);
374 if (sps->chroma_format_idc > 3) {
375 avpriv_request_sample(avctx, "chroma_format_idc %u",
376 sps->chroma_format_idc);
378 } else if (sps->chroma_format_idc == 3) {
379 sps->residual_color_transform_flag = get_bits1(gb);
381 sps->bit_depth_luma = get_ue_golomb(gb) + 8;
382 sps->bit_depth_chroma = get_ue_golomb(gb) + 8;
383 if (sps->bit_depth_chroma != sps->bit_depth_luma) {
384 avpriv_request_sample(avctx,
385 "Different chroma and luma bit depth");
388 sps->transform_bypass = get_bits1(gb);
389 decode_scaling_matrices(gb, sps, NULL, 1,
390 sps->scaling_matrix4, sps->scaling_matrix8);
392 sps->chroma_format_idc = 1;
393 sps->bit_depth_luma = 8;
394 sps->bit_depth_chroma = 8;
397 log2_max_frame_num_minus4 = get_ue_golomb(gb);
398 if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
399 log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
400 av_log(avctx, AV_LOG_ERROR,
401 "log2_max_frame_num_minus4 out of range (0-12): %d\n",
402 log2_max_frame_num_minus4);
405 sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
407 sps->poc_type = get_ue_golomb_31(gb);
409 if (sps->poc_type == 0) { // FIXME #define
410 sps->log2_max_poc_lsb = get_ue_golomb(gb) + 4;
411 } else if (sps->poc_type == 1) { // FIXME #define
412 sps->delta_pic_order_always_zero_flag = get_bits1(gb);
413 sps->offset_for_non_ref_pic = get_se_golomb(gb);
414 sps->offset_for_top_to_bottom_field = get_se_golomb(gb);
415 sps->poc_cycle_length = get_ue_golomb(gb);
417 if ((unsigned)sps->poc_cycle_length >=
418 FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
419 av_log(avctx, AV_LOG_ERROR,
420 "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
424 for (i = 0; i < sps->poc_cycle_length; i++)
425 sps->offset_for_ref_frame[i] = get_se_golomb(gb);
426 } else if (sps->poc_type != 2) {
427 av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
431 sps->ref_frame_count = get_ue_golomb_31(gb);
432 if (sps->ref_frame_count > H264_MAX_PICTURE_COUNT - 2 ||
433 sps->ref_frame_count >= 32U) {
434 av_log(avctx, AV_LOG_ERROR,
435 "too many reference frames %d\n", sps->ref_frame_count);
438 sps->gaps_in_frame_num_allowed_flag = get_bits1(gb);
439 sps->mb_width = get_ue_golomb(gb) + 1;
440 sps->mb_height = get_ue_golomb(gb) + 1;
441 if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
442 (unsigned)sps->mb_height >= INT_MAX / 16 ||
443 av_image_check_size(16 * sps->mb_width,
444 16 * sps->mb_height, 0, avctx)) {
445 av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
449 sps->frame_mbs_only_flag = get_bits1(gb);
450 if (!sps->frame_mbs_only_flag)
451 sps->mb_aff = get_bits1(gb);
455 sps->direct_8x8_inference_flag = get_bits1(gb);
456 if (!sps->frame_mbs_only_flag && !sps->direct_8x8_inference_flag) {
457 av_log(avctx, AV_LOG_ERROR,
458 "This stream was generated by a broken encoder, invalid 8x8 inference\n");
462 #ifndef ALLOW_INTERLACE
464 av_log(avctx, AV_LOG_ERROR,
465 "MBAFF support not included; enable it at compile-time.\n");
467 sps->crop = get_bits1(gb);
469 unsigned int crop_left = get_ue_golomb(gb);
470 unsigned int crop_right = get_ue_golomb(gb);
471 unsigned int crop_top = get_ue_golomb(gb);
472 unsigned int crop_bottom = get_ue_golomb(gb);
474 if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
475 av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
476 "values are l:%d r:%d t:%d b:%d\n",
477 crop_left, crop_right, crop_top, crop_bottom);
482 sps->crop_bottom = 0;
484 int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
485 int hsub = (sps->chroma_format_idc == 1 ||
486 sps->chroma_format_idc == 2) ? 1 : 0;
487 int step_x = 1 << hsub;
488 int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
490 if (crop_left & (0x1F >> (sps->bit_depth_luma > 8)) &&
491 !(avctx->flags & AV_CODEC_FLAG_UNALIGNED)) {
492 crop_left &= ~(0x1F >> (sps->bit_depth_luma > 8));
493 av_log(avctx, AV_LOG_WARNING,
494 "Reducing left cropping to %d "
495 "chroma samples to preserve alignment.\n",
499 if (INT_MAX / step_x <= crop_left ||
500 INT_MAX / step_x - crop_left <= crop_right ||
501 16 * sps->mb_width <= step_x * (crop_left + crop_right) ||
502 INT_MAX / step_y <= crop_top ||
503 INT_MAX / step_y - crop_top <= crop_bottom ||
504 16 * sps->mb_height <= step_y * (crop_top + crop_bottom)) {
505 av_log(avctx, AV_LOG_WARNING, "Invalid crop parameters\n");
506 if (avctx->err_recognition & AV_EF_EXPLODE)
508 crop_left = crop_right = crop_top = crop_bottom = 0;
511 sps->crop_left = crop_left * step_x;
512 sps->crop_right = crop_right * step_x;
513 sps->crop_top = crop_top * step_y;
514 sps->crop_bottom = crop_bottom * step_y;
524 sps->vui_parameters_present_flag = get_bits1(gb);
525 if (sps->vui_parameters_present_flag) {
526 int ret = decode_vui_parameters(gb, avctx, sps);
527 if (ret < 0 && avctx->err_recognition & AV_EF_EXPLODE)
531 /* if the maximum delay is not stored in the SPS, derive it based on the
533 if (!sps->bitstream_restriction_flag) {
534 sps->num_reorder_frames = MAX_DELAYED_PIC_COUNT - 1;
535 for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
536 if (level_max_dpb_mbs[i][0] == sps->level_idc) {
537 sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
538 sps->num_reorder_frames);
547 if (avctx->debug & FF_DEBUG_PICT_INFO) {
548 static const char csp[4][5] = { "Gray", "420", "422", "444" };
549 av_log(avctx, AV_LOG_DEBUG,
550 "sps:%u profile:%d/%d poc:%d ref:%d %dx%d %s %s crop:%u/%u/%u/%u %s %s %"PRId32"/%"PRId32"\n",
551 sps_id, sps->profile_idc, sps->level_idc,
553 sps->ref_frame_count,
554 sps->mb_width, sps->mb_height,
555 sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
556 sps->direct_8x8_inference_flag ? "8B8" : "",
557 sps->crop_left, sps->crop_right,
558 sps->crop_top, sps->crop_bottom,
559 sps->vui_parameters_present_flag ? "VUI" : "",
560 csp[sps->chroma_format_idc],
561 sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
562 sps->timing_info_present_flag ? sps->time_scale : 0);
565 /* check if this is a repeat of an already parsed SPS, then keep the
567 * otherwise drop all PPSes that depend on it */
568 if (ps->sps_list[sps_id] &&
569 !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
570 av_buffer_unref(&sps_buf);
572 remove_sps(ps, sps_id);
573 ps->sps_list[sps_id] = sps_buf;
579 av_buffer_unref(&sps_buf);
580 return AVERROR_INVALIDDATA;
583 static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
586 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
588 for (i = 0; i < 6; i++) {
589 pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
590 for (j = 0; j < i; j++)
591 if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
592 64 * sizeof(uint8_t))) {
593 pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
599 for (q = 0; q < max_qp + 1; q++) {
600 int shift = ff_h264_quant_div6[q];
601 int idx = ff_h264_quant_rem6[q];
602 for (x = 0; x < 64; x++)
603 pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
604 ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
605 pps->scaling_matrix8[i][x]) << shift;
610 static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
613 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
614 for (i = 0; i < 6; i++) {
615 pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
616 for (j = 0; j < i; j++)
617 if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
618 16 * sizeof(uint8_t))) {
619 pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
625 for (q = 0; q < max_qp + 1; q++) {
626 int shift = ff_h264_quant_div6[q] + 2;
627 int idx = ff_h264_quant_rem6[q];
628 for (x = 0; x < 16; x++)
629 pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
630 ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
631 pps->scaling_matrix4[i][x]) << shift;
636 static void init_dequant_tables(PPS *pps, const SPS *sps)
639 init_dequant4_coeff_table(pps, sps);
640 if (pps->transform_8x8_mode)
641 init_dequant8_coeff_table(pps, sps);
642 if (sps->transform_bypass) {
643 for (i = 0; i < 6; i++)
644 for (x = 0; x < 16; x++)
645 pps->dequant4_coeff[i][0][x] = 1 << 6;
646 if (pps->transform_8x8_mode)
647 for (i = 0; i < 6; i++)
648 for (x = 0; x < 64; x++)
649 pps->dequant8_coeff[i][0][x] = 1 << 6;
653 static void build_qp_table(PPS *pps, int t, int index, const int depth)
656 const int max_qp = 51 + 6 * (depth - 8);
657 for (i = 0; i < max_qp + 1; i++)
658 pps->chroma_qp_table[t][i] =
659 ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
662 int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
663 H264ParamSets *ps, int bit_length)
665 AVBufferRef *pps_buf;
667 unsigned int pps_id = get_ue_golomb(gb);
673 if (pps_id >= MAX_PPS_COUNT) {
674 av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
675 return AVERROR_INVALIDDATA;
678 pps_buf = av_buffer_allocz(sizeof(*pps));
680 return AVERROR(ENOMEM);
681 pps = (PPS*)pps_buf->data;
683 pps->sps_id = get_ue_golomb_31(gb);
684 if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
685 !ps->sps_list[pps->sps_id]) {
686 av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
687 ret = AVERROR_INVALIDDATA;
690 sps = (SPS*)ps->sps_list[pps->sps_id]->data;
692 if (sps->bit_depth_luma > 10) {
693 av_log(avctx, AV_LOG_ERROR,
694 "Unimplemented luma bit depth=%d (max=10)\n",
695 sps->bit_depth_luma);
696 ret = AVERROR_PATCHWELCOME;
700 pps->cabac = get_bits1(gb);
701 pps->pic_order_present = get_bits1(gb);
702 pps->slice_group_count = get_ue_golomb(gb) + 1;
703 if (pps->slice_group_count > 1) {
704 pps->mb_slice_group_map_type = get_ue_golomb(gb);
705 av_log(avctx, AV_LOG_ERROR, "FMO not supported\n");
706 switch (pps->mb_slice_group_map_type) {
709 | for (i = 0; i <= num_slice_groups_minus1; i++) | | |
710 | run_length[i] |1 |ue(v) |
715 | for (i = 0; i < num_slice_groups_minus1; i++) { | | |
716 | top_left_mb[i] |1 |ue(v) |
717 | bottom_right_mb[i] |1 |ue(v) |
725 | slice_group_change_direction_flag |1 |u(1) |
726 | slice_group_change_rate_minus1 |1 |ue(v) |
731 | slice_group_id_cnt_minus1 |1 |ue(v) |
732 | for (i = 0; i <= slice_group_id_cnt_minus1; i++)| | |
733 | slice_group_id[i] |1 |u(v) |
738 pps->ref_count[0] = get_ue_golomb(gb) + 1;
739 pps->ref_count[1] = get_ue_golomb(gb) + 1;
740 if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
741 av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
742 ret = AVERROR_INVALIDDATA;
746 qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
748 pps->weighted_pred = get_bits1(gb);
749 pps->weighted_bipred_idc = get_bits(gb, 2);
750 pps->init_qp = get_se_golomb(gb) + 26 + qp_bd_offset;
751 pps->init_qs = get_se_golomb(gb) + 26 + qp_bd_offset;
752 pps->chroma_qp_index_offset[0] = get_se_golomb(gb);
753 pps->deblocking_filter_parameters_present = get_bits1(gb);
754 pps->constrained_intra_pred = get_bits1(gb);
755 pps->redundant_pic_cnt_present = get_bits1(gb);
757 pps->transform_8x8_mode = 0;
758 memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
759 sizeof(pps->scaling_matrix4));
760 memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
761 sizeof(pps->scaling_matrix8));
763 bits_left = bit_length - get_bits_count(gb);
764 if (bits_left && (bits_left > 8 ||
765 show_bits(gb, bits_left) != 1 << (bits_left - 1))) {
766 pps->transform_8x8_mode = get_bits1(gb);
767 decode_scaling_matrices(gb, sps, pps, 0,
768 pps->scaling_matrix4, pps->scaling_matrix8);
769 // second_chroma_qp_index_offset
770 pps->chroma_qp_index_offset[1] = get_se_golomb(gb);
772 pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
775 build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
776 sps->bit_depth_luma);
777 build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
778 sps->bit_depth_luma);
780 init_dequant_tables(pps, sps);
782 if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
783 pps->chroma_qp_diff = 1;
785 if (avctx->debug & FF_DEBUG_PICT_INFO) {
786 av_log(avctx, AV_LOG_DEBUG,
787 "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
789 pps->cabac ? "CABAC" : "CAVLC",
790 pps->slice_group_count,
791 pps->ref_count[0], pps->ref_count[1],
792 pps->weighted_pred ? "weighted" : "",
793 pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
794 pps->deblocking_filter_parameters_present ? "LPAR" : "",
795 pps->constrained_intra_pred ? "CONSTR" : "",
796 pps->redundant_pic_cnt_present ? "REDU" : "",
797 pps->transform_8x8_mode ? "8x8DCT" : "");
800 remove_pps(ps, pps_id);
801 ps->pps_list[pps_id] = pps_buf;
806 av_buffer_unref(&pps_buf);