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 / MPEG-4 part10 parameter set decoding.
25 * @author Michael Niedermayer <michaelni@gmx.at>
30 #include "libavutil/imgutils.h"
32 #include "golomb_legacy.h"
39 #define MAX_LOG2_MAX_FRAME_NUM (12 + 4)
40 #define MIN_LOG2_MAX_FRAME_NUM 4
42 #define EXTENDED_SAR 255
44 static const AVRational pixel_aspect[17] = {
64 static const uint8_t default_scaling4[2][16] = {
65 { 6, 13, 20, 28, 13, 20, 28, 32,
66 20, 28, 32, 37, 28, 32, 37, 42 },
67 { 10, 14, 20, 24, 14, 20, 24, 27,
68 20, 24, 27, 30, 24, 27, 30, 34 }
71 static const uint8_t default_scaling8[2][64] = {
72 { 6, 10, 13, 16, 18, 23, 25, 27,
73 10, 11, 16, 18, 23, 25, 27, 29,
74 13, 16, 18, 23, 25, 27, 29, 31,
75 16, 18, 23, 25, 27, 29, 31, 33,
76 18, 23, 25, 27, 29, 31, 33, 36,
77 23, 25, 27, 29, 31, 33, 36, 38,
78 25, 27, 29, 31, 33, 36, 38, 40,
79 27, 29, 31, 33, 36, 38, 40, 42 },
80 { 9, 13, 15, 17, 19, 21, 22, 24,
81 13, 13, 17, 19, 21, 22, 24, 25,
82 15, 17, 19, 21, 22, 24, 25, 27,
83 17, 19, 21, 22, 24, 25, 27, 28,
84 19, 21, 22, 24, 25, 27, 28, 30,
85 21, 22, 24, 25, 27, 28, 30, 32,
86 22, 24, 25, 27, 28, 30, 32, 33,
87 24, 25, 27, 28, 30, 32, 33, 35 }
90 /* maximum number of MBs in the DPB for a given level */
91 static const int level_max_dpb_mbs[][2] = {
110 static void remove_pps(H264ParamSets *s, int id)
112 if (s->pps_list[id] && s->pps == (const PPS*)s->pps_list[id]->data)
114 av_buffer_unref(&s->pps_list[id]);
117 static void remove_sps(H264ParamSets *s, int id)
120 if (s->sps_list[id]) {
121 if (s->sps == (SPS*)s->sps_list[id]->data)
124 /* drop all PPS that depend on this SPS */
125 for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
126 if (s->pps_list[i] && ((PPS*)s->pps_list[i]->data)->sps_id == id)
129 av_buffer_unref(&s->sps_list[id]);
132 static inline int decode_hrd_parameters(GetBitContext *gb, AVCodecContext *avctx,
136 cpb_count = get_ue_golomb_31(gb) + 1;
138 if (cpb_count > 32U) {
139 av_log(avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
140 return AVERROR_INVALIDDATA;
143 get_bits(gb, 4); /* bit_rate_scale */
144 get_bits(gb, 4); /* cpb_size_scale */
145 for (i = 0; i < cpb_count; i++) {
146 get_ue_golomb_long(gb); /* bit_rate_value_minus1 */
147 get_ue_golomb_long(gb); /* cpb_size_value_minus1 */
148 get_bits1(gb); /* cbr_flag */
150 sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1;
151 sps->cpb_removal_delay_length = get_bits(gb, 5) + 1;
152 sps->dpb_output_delay_length = get_bits(gb, 5) + 1;
153 sps->time_offset_length = get_bits(gb, 5);
154 sps->cpb_cnt = cpb_count;
158 static inline int decode_vui_parameters(GetBitContext *gb, AVCodecContext *avctx,
161 int aspect_ratio_info_present_flag;
162 unsigned int aspect_ratio_idc;
164 aspect_ratio_info_present_flag = get_bits1(gb);
166 if (aspect_ratio_info_present_flag) {
167 aspect_ratio_idc = get_bits(gb, 8);
168 if (aspect_ratio_idc == EXTENDED_SAR) {
169 sps->sar.num = get_bits(gb, 16);
170 sps->sar.den = get_bits(gb, 16);
171 } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(pixel_aspect)) {
172 sps->sar = pixel_aspect[aspect_ratio_idc];
174 av_log(avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
175 return AVERROR_INVALIDDATA;
182 if (get_bits1(gb)) /* overscan_info_present_flag */
183 get_bits1(gb); /* overscan_appropriate_flag */
185 sps->video_signal_type_present_flag = get_bits1(gb);
186 if (sps->video_signal_type_present_flag) {
187 get_bits(gb, 3); /* video_format */
188 sps->full_range = get_bits1(gb); /* video_full_range_flag */
190 sps->colour_description_present_flag = get_bits1(gb);
191 if (sps->colour_description_present_flag) {
192 sps->color_primaries = get_bits(gb, 8); /* colour_primaries */
193 sps->color_trc = get_bits(gb, 8); /* transfer_characteristics */
194 sps->colorspace = get_bits(gb, 8); /* matrix_coefficients */
196 // Set invalid values to "unspecified"
197 if (!av_color_primaries_name(sps->color_primaries))
198 sps->color_primaries = AVCOL_PRI_UNSPECIFIED;
199 if (!av_color_transfer_name(sps->color_trc))
200 sps->color_trc = AVCOL_TRC_UNSPECIFIED;
201 if (!av_color_space_name(sps->colorspace))
202 sps->colorspace = AVCOL_SPC_UNSPECIFIED;
206 /* chroma_location_info_present_flag */
208 /* chroma_sample_location_type_top_field */
209 avctx->chroma_sample_location = get_ue_golomb(gb) + 1;
210 get_ue_golomb(gb); /* chroma_sample_location_type_bottom_field */
213 sps->timing_info_present_flag = get_bits1(gb);
214 if (sps->timing_info_present_flag) {
215 sps->num_units_in_tick = get_bits_long(gb, 32);
216 sps->time_scale = get_bits_long(gb, 32);
217 if (!sps->num_units_in_tick || !sps->time_scale) {
218 av_log(avctx, AV_LOG_ERROR,
219 "time_scale/num_units_in_tick invalid or unsupported (%"PRIu32"/%"PRIu32")\n",
220 sps->time_scale, sps->num_units_in_tick);
221 return AVERROR_INVALIDDATA;
223 sps->fixed_frame_rate_flag = get_bits1(gb);
226 sps->nal_hrd_parameters_present_flag = get_bits1(gb);
227 if (sps->nal_hrd_parameters_present_flag)
228 if (decode_hrd_parameters(gb, avctx, sps) < 0)
229 return AVERROR_INVALIDDATA;
230 sps->vcl_hrd_parameters_present_flag = get_bits1(gb);
231 if (sps->vcl_hrd_parameters_present_flag)
232 if (decode_hrd_parameters(gb, avctx, sps) < 0)
233 return AVERROR_INVALIDDATA;
234 if (sps->nal_hrd_parameters_present_flag ||
235 sps->vcl_hrd_parameters_present_flag)
236 get_bits1(gb); /* low_delay_hrd_flag */
237 sps->pic_struct_present_flag = get_bits1(gb);
239 sps->bitstream_restriction_flag = get_bits1(gb);
240 if (sps->bitstream_restriction_flag) {
241 get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */
242 get_ue_golomb(gb); /* max_bytes_per_pic_denom */
243 get_ue_golomb(gb); /* max_bits_per_mb_denom */
244 get_ue_golomb(gb); /* log2_max_mv_length_horizontal */
245 get_ue_golomb(gb); /* log2_max_mv_length_vertical */
246 sps->num_reorder_frames = get_ue_golomb(gb);
247 get_ue_golomb(gb); /*max_dec_frame_buffering*/
249 if (get_bits_left(gb) < 0) {
250 sps->num_reorder_frames = 0;
251 sps->bitstream_restriction_flag = 0;
254 if (sps->num_reorder_frames > 16U
255 /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
256 av_log(avctx, AV_LOG_ERROR,
257 "Clipping illegal num_reorder_frames %d\n",
258 sps->num_reorder_frames);
259 sps->num_reorder_frames = 16;
260 return AVERROR_INVALIDDATA;
263 if (get_bits_left(gb) < 0) {
264 av_log(avctx, AV_LOG_ERROR,
265 "Overread VUI by %d bits\n", -get_bits_left(gb));
266 return AVERROR_INVALIDDATA;
272 static void decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
273 const uint8_t *jvt_list,
274 const uint8_t *fallback_list)
276 int i, last = 8, next = 8;
277 const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
278 if (!get_bits1(gb)) /* matrix not written, we use the predicted one */
279 memcpy(factors, fallback_list, size * sizeof(uint8_t));
281 for (i = 0; i < size; i++) {
283 next = (last + get_se_golomb(gb)) & 0xff;
284 if (!i && !next) { /* matrix not written, we use the preset one */
285 memcpy(factors, jvt_list, size * sizeof(uint8_t));
288 last = factors[scan[i]] = next ? next : last;
292 static void decode_scaling_matrices(GetBitContext *gb, SPS *sps,
293 PPS *pps, int is_sps,
294 uint8_t(*scaling_matrix4)[16],
295 uint8_t(*scaling_matrix8)[64])
297 int fallback_sps = !is_sps && sps->scaling_matrix_present;
298 const uint8_t *fallback[4] = {
299 fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
300 fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
301 fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
302 fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
305 sps->scaling_matrix_present |= is_sps;
306 decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
307 decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
308 decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
309 decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
310 decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
311 decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
312 if (is_sps || pps->transform_8x8_mode) {
313 decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
314 if (sps->chroma_format_idc == 3) {
315 decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
316 decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
318 decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
319 if (sps->chroma_format_idc == 3) {
320 decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
321 decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
327 int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
330 AVBufferRef *sps_buf;
331 int profile_idc, level_idc, constraint_set_flags = 0;
333 int i, log2_max_frame_num_minus4;
336 profile_idc = get_bits(gb, 8);
337 constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
338 constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
339 constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag
340 constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag
341 constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag
342 constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag
343 skip_bits(gb, 2); // reserved_zero_2bits
344 level_idc = get_bits(gb, 8);
345 sps_id = get_ue_golomb_31(gb);
347 if (sps_id >= MAX_SPS_COUNT) {
348 av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
349 return AVERROR_INVALIDDATA;
352 sps_buf = av_buffer_allocz(sizeof(*sps));
354 return AVERROR(ENOMEM);
355 sps = (SPS*)sps_buf->data;
357 sps->sps_id = sps_id;
358 sps->time_offset_length = 24;
359 sps->profile_idc = profile_idc;
360 sps->constraint_set_flags = constraint_set_flags;
361 sps->level_idc = level_idc;
363 memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
364 memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
365 sps->scaling_matrix_present = 0;
367 if (sps->profile_idc == 100 || // High profile
368 sps->profile_idc == 110 || // High10 profile
369 sps->profile_idc == 122 || // High422 profile
370 sps->profile_idc == 244 || // High444 Predictive profile
371 sps->profile_idc == 44 || // Cavlc444 profile
372 sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
373 sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
374 sps->profile_idc == 118 || // Stereo High profile (MVC)
375 sps->profile_idc == 128 || // Multiview High profile (MVC)
376 sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
377 sps->profile_idc == 144) { // old High444 profile
378 sps->chroma_format_idc = get_ue_golomb_31(gb);
379 if (sps->chroma_format_idc > 3) {
380 avpriv_request_sample(avctx, "chroma_format_idc %u",
381 sps->chroma_format_idc);
383 } else if (sps->chroma_format_idc == 3) {
384 sps->residual_color_transform_flag = get_bits1(gb);
386 sps->bit_depth_luma = get_ue_golomb(gb) + 8;
387 sps->bit_depth_chroma = get_ue_golomb(gb) + 8;
388 if (sps->bit_depth_chroma != sps->bit_depth_luma) {
389 avpriv_request_sample(avctx,
390 "Different chroma and luma bit depth");
393 sps->transform_bypass = get_bits1(gb);
394 decode_scaling_matrices(gb, sps, NULL, 1,
395 sps->scaling_matrix4, sps->scaling_matrix8);
397 sps->chroma_format_idc = 1;
398 sps->bit_depth_luma = 8;
399 sps->bit_depth_chroma = 8;
402 log2_max_frame_num_minus4 = get_ue_golomb(gb);
403 if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
404 log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
405 av_log(avctx, AV_LOG_ERROR,
406 "log2_max_frame_num_minus4 out of range (0-12): %d\n",
407 log2_max_frame_num_minus4);
410 sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
412 sps->poc_type = get_ue_golomb_31(gb);
414 if (sps->poc_type == 0) { // FIXME #define
415 sps->log2_max_poc_lsb = get_ue_golomb(gb) + 4;
416 } else if (sps->poc_type == 1) { // FIXME #define
417 sps->delta_pic_order_always_zero_flag = get_bits1(gb);
418 sps->offset_for_non_ref_pic = get_se_golomb(gb);
419 sps->offset_for_top_to_bottom_field = get_se_golomb(gb);
420 sps->poc_cycle_length = get_ue_golomb(gb);
422 if ((unsigned)sps->poc_cycle_length >=
423 FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
424 av_log(avctx, AV_LOG_ERROR,
425 "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
429 for (i = 0; i < sps->poc_cycle_length; i++)
430 sps->offset_for_ref_frame[i] = get_se_golomb(gb);
431 } else if (sps->poc_type != 2) {
432 av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
436 sps->ref_frame_count = get_ue_golomb_31(gb);
437 if (sps->ref_frame_count > MAX_DELAYED_PIC_COUNT) {
438 av_log(avctx, AV_LOG_ERROR,
439 "too many reference frames %d\n", sps->ref_frame_count);
442 sps->gaps_in_frame_num_allowed_flag = get_bits1(gb);
443 sps->mb_width = get_ue_golomb(gb) + 1;
444 sps->mb_height = get_ue_golomb(gb) + 1;
446 sps->frame_mbs_only_flag = get_bits1(gb);
448 if (sps->mb_height >= INT_MAX / 2) {
449 av_log(avctx, AV_LOG_ERROR, "height overflow\n");
452 sps->mb_height *= 2 - sps->frame_mbs_only_flag;
454 if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
455 (unsigned)sps->mb_height >= INT_MAX / 16 ||
456 av_image_check_size(16 * sps->mb_width,
457 16 * sps->mb_height, 0, avctx)) {
458 av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
462 if (!sps->frame_mbs_only_flag)
463 sps->mb_aff = get_bits1(gb);
467 sps->direct_8x8_inference_flag = get_bits1(gb);
468 if (!sps->frame_mbs_only_flag && !sps->direct_8x8_inference_flag) {
469 av_log(avctx, AV_LOG_ERROR,
470 "This stream was generated by a broken encoder, invalid 8x8 inference\n");
474 #ifndef ALLOW_INTERLACE
476 av_log(avctx, AV_LOG_ERROR,
477 "MBAFF support not included; enable it at compile-time.\n");
479 sps->crop = get_bits1(gb);
481 unsigned int crop_left = get_ue_golomb(gb);
482 unsigned int crop_right = get_ue_golomb(gb);
483 unsigned int crop_top = get_ue_golomb(gb);
484 unsigned int crop_bottom = get_ue_golomb(gb);
486 if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
487 av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
488 "values are l:%d r:%d t:%d b:%d\n",
489 crop_left, crop_right, crop_top, crop_bottom);
494 sps->crop_bottom = 0;
496 int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
497 int hsub = (sps->chroma_format_idc == 1 ||
498 sps->chroma_format_idc == 2) ? 1 : 0;
499 int step_x = 1 << hsub;
500 int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
502 if (INT_MAX / step_x <= crop_left ||
503 INT_MAX / step_x - crop_left <= crop_right ||
504 16 * sps->mb_width <= step_x * (crop_left + crop_right) ||
505 INT_MAX / step_y <= crop_top ||
506 INT_MAX / step_y - crop_top <= crop_bottom ||
507 16 * sps->mb_height <= step_y * (crop_top + crop_bottom)) {
508 av_log(avctx, AV_LOG_WARNING, "Invalid crop parameters\n");
509 if (avctx->err_recognition & AV_EF_EXPLODE)
511 crop_left = crop_right = crop_top = crop_bottom = 0;
514 sps->crop_left = crop_left * step_x;
515 sps->crop_right = crop_right * step_x;
516 sps->crop_top = crop_top * step_y;
517 sps->crop_bottom = crop_bottom * step_y;
527 sps->vui_parameters_present_flag = get_bits1(gb);
528 if (sps->vui_parameters_present_flag) {
529 int ret = decode_vui_parameters(gb, avctx, sps);
530 if (ret < 0 && avctx->err_recognition & AV_EF_EXPLODE)
534 /* if the maximum delay is not stored in the SPS, derive it based on the
536 if (!sps->bitstream_restriction_flag &&
537 (sps->ref_frame_count || avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT)) {
538 sps->num_reorder_frames = MAX_DELAYED_PIC_COUNT - 1;
539 for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
540 if (level_max_dpb_mbs[i][0] == sps->level_idc) {
541 sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
542 sps->num_reorder_frames);
551 if (avctx->debug & FF_DEBUG_PICT_INFO) {
552 static const char csp[4][5] = { "Gray", "420", "422", "444" };
553 av_log(avctx, AV_LOG_DEBUG,
554 "sps:%u profile:%d/%d poc:%d ref:%d %dx%d %s %s crop:%u/%u/%u/%u %s %s %"PRId32"/%"PRId32"\n",
555 sps_id, sps->profile_idc, sps->level_idc,
557 sps->ref_frame_count,
558 sps->mb_width, sps->mb_height,
559 sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
560 sps->direct_8x8_inference_flag ? "8B8" : "",
561 sps->crop_left, sps->crop_right,
562 sps->crop_top, sps->crop_bottom,
563 sps->vui_parameters_present_flag ? "VUI" : "",
564 csp[sps->chroma_format_idc],
565 sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
566 sps->timing_info_present_flag ? sps->time_scale : 0);
569 /* check if this is a repeat of an already parsed SPS, then keep the
571 * otherwise drop all PPSes that depend on it */
572 if (ps->sps_list[sps_id] &&
573 !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
574 av_buffer_unref(&sps_buf);
576 remove_sps(ps, sps_id);
577 ps->sps_list[sps_id] = sps_buf;
583 av_buffer_unref(&sps_buf);
584 return AVERROR_INVALIDDATA;
587 static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
590 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
592 for (i = 0; i < 6; i++) {
593 pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
594 for (j = 0; j < i; j++)
595 if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
596 64 * sizeof(uint8_t))) {
597 pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
603 for (q = 0; q < max_qp + 1; q++) {
604 int shift = ff_h264_quant_div6[q];
605 int idx = ff_h264_quant_rem6[q];
606 for (x = 0; x < 64; x++)
607 pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
608 ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
609 pps->scaling_matrix8[i][x]) << shift;
614 static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
617 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
618 for (i = 0; i < 6; i++) {
619 pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
620 for (j = 0; j < i; j++)
621 if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
622 16 * sizeof(uint8_t))) {
623 pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
629 for (q = 0; q < max_qp + 1; q++) {
630 int shift = ff_h264_quant_div6[q] + 2;
631 int idx = ff_h264_quant_rem6[q];
632 for (x = 0; x < 16; x++)
633 pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
634 ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
635 pps->scaling_matrix4[i][x]) << shift;
640 static void init_dequant_tables(PPS *pps, const SPS *sps)
643 init_dequant4_coeff_table(pps, sps);
644 if (pps->transform_8x8_mode)
645 init_dequant8_coeff_table(pps, sps);
646 if (sps->transform_bypass) {
647 for (i = 0; i < 6; i++)
648 for (x = 0; x < 16; x++)
649 pps->dequant4_coeff[i][0][x] = 1 << 6;
650 if (pps->transform_8x8_mode)
651 for (i = 0; i < 6; i++)
652 for (x = 0; x < 64; x++)
653 pps->dequant8_coeff[i][0][x] = 1 << 6;
657 static void build_qp_table(PPS *pps, int t, int index, const int depth)
660 const int max_qp = 51 + 6 * (depth - 8);
661 for (i = 0; i < max_qp + 1; i++)
662 pps->chroma_qp_table[t][i] =
663 ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
666 int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
667 H264ParamSets *ps, int bit_length)
669 AVBufferRef *pps_buf;
671 unsigned int pps_id = get_ue_golomb(gb);
677 if (pps_id >= MAX_PPS_COUNT) {
678 av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
679 return AVERROR_INVALIDDATA;
682 pps_buf = av_buffer_allocz(sizeof(*pps));
684 return AVERROR(ENOMEM);
685 pps = (PPS*)pps_buf->data;
687 pps->sps_id = get_ue_golomb_31(gb);
688 if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
689 !ps->sps_list[pps->sps_id]) {
690 av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
691 ret = AVERROR_INVALIDDATA;
694 sps = (SPS*)ps->sps_list[pps->sps_id]->data;
696 if (sps->bit_depth_luma > 10) {
697 avpriv_report_missing_feature(avctx, "Luma bit depth=%d (max=10)",
698 sps->bit_depth_luma);
699 ret = AVERROR_PATCHWELCOME;
703 pps->cabac = get_bits1(gb);
704 pps->pic_order_present = get_bits1(gb);
705 pps->slice_group_count = get_ue_golomb(gb) + 1;
706 if (pps->slice_group_count > 1) {
707 pps->mb_slice_group_map_type = get_ue_golomb(gb);
708 av_log(avctx, AV_LOG_ERROR, "FMO not supported\n");
710 pps->ref_count[0] = get_ue_golomb(gb) + 1;
711 pps->ref_count[1] = get_ue_golomb(gb) + 1;
712 if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
713 av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
714 ret = AVERROR_INVALIDDATA;
718 qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
720 pps->weighted_pred = get_bits1(gb);
721 pps->weighted_bipred_idc = get_bits(gb, 2);
722 pps->init_qp = get_se_golomb(gb) + 26 + qp_bd_offset;
723 pps->init_qs = get_se_golomb(gb) + 26 + qp_bd_offset;
724 pps->chroma_qp_index_offset[0] = get_se_golomb(gb);
725 pps->deblocking_filter_parameters_present = get_bits1(gb);
726 pps->constrained_intra_pred = get_bits1(gb);
727 pps->redundant_pic_cnt_present = get_bits1(gb);
729 pps->transform_8x8_mode = 0;
730 memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
731 sizeof(pps->scaling_matrix4));
732 memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
733 sizeof(pps->scaling_matrix8));
735 bits_left = bit_length - get_bits_count(gb);
736 if (bits_left && (bits_left > 8 ||
737 show_bits(gb, bits_left) != 1 << (bits_left - 1))) {
738 pps->transform_8x8_mode = get_bits1(gb);
739 decode_scaling_matrices(gb, sps, pps, 0,
740 pps->scaling_matrix4, pps->scaling_matrix8);
741 // second_chroma_qp_index_offset
742 pps->chroma_qp_index_offset[1] = get_se_golomb(gb);
744 pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
747 build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
748 sps->bit_depth_luma);
749 build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
750 sps->bit_depth_luma);
752 init_dequant_tables(pps, sps);
754 if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
755 pps->chroma_qp_diff = 1;
757 if (avctx->debug & FF_DEBUG_PICT_INFO) {
758 av_log(avctx, AV_LOG_DEBUG,
759 "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
761 pps->cabac ? "CABAC" : "CAVLC",
762 pps->slice_group_count,
763 pps->ref_count[0], pps->ref_count[1],
764 pps->weighted_pred ? "weighted" : "",
765 pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
766 pps->deblocking_filter_parameters_present ? "LPAR" : "",
767 pps->constrained_intra_pred ? "CONSTR" : "",
768 pps->redundant_pic_cnt_present ? "REDU" : "",
769 pps->transform_8x8_mode ? "8x8DCT" : "");
772 remove_pps(ps, pps_id);
773 ps->pps_list[pps_id] = pps_buf;
778 av_buffer_unref(&pps_buf);