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 / MPEG-4 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 #define EXTENDED_SAR 255
43 static const uint8_t default_scaling4[2][16] = {
44 { 6, 13, 20, 28, 13, 20, 28, 32,
45 20, 28, 32, 37, 28, 32, 37, 42 },
46 { 10, 14, 20, 24, 14, 20, 24, 27,
47 20, 24, 27, 30, 24, 27, 30, 34 }
50 static const uint8_t default_scaling8[2][64] = {
51 { 6, 10, 13, 16, 18, 23, 25, 27,
52 10, 11, 16, 18, 23, 25, 27, 29,
53 13, 16, 18, 23, 25, 27, 29, 31,
54 16, 18, 23, 25, 27, 29, 31, 33,
55 18, 23, 25, 27, 29, 31, 33, 36,
56 23, 25, 27, 29, 31, 33, 36, 38,
57 25, 27, 29, 31, 33, 36, 38, 40,
58 27, 29, 31, 33, 36, 38, 40, 42 },
59 { 9, 13, 15, 17, 19, 21, 22, 24,
60 13, 13, 17, 19, 21, 22, 24, 25,
61 15, 17, 19, 21, 22, 24, 25, 27,
62 17, 19, 21, 22, 24, 25, 27, 28,
63 19, 21, 22, 24, 25, 27, 28, 30,
64 21, 22, 24, 25, 27, 28, 30, 32,
65 22, 24, 25, 27, 28, 30, 32, 33,
66 24, 25, 27, 28, 30, 32, 33, 35 }
69 /* maximum number of MBs in the DPB for a given level */
70 static const int level_max_dpb_mbs[][2] = {
89 static void remove_pps(H264ParamSets *s, int id)
91 av_buffer_unref(&s->pps_list[id]);
94 static void remove_sps(H264ParamSets *s, int id)
98 if (s->sps_list[id]) {
99 /* drop all PPS that depend on this SPS */
100 for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
101 if (s->pps_list[i] && ((PPS*)s->pps_list[i]->data)->sps_id == id)
105 av_buffer_unref(&s->sps_list[id]);
108 static inline int decode_hrd_parameters(GetBitContext *gb, AVCodecContext *avctx,
112 cpb_count = get_ue_golomb_31(gb) + 1;
114 if (cpb_count > 32U) {
115 av_log(avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
116 return AVERROR_INVALIDDATA;
119 get_bits(gb, 4); /* bit_rate_scale */
120 get_bits(gb, 4); /* cpb_size_scale */
121 for (i = 0; i < cpb_count; i++) {
122 get_ue_golomb_long(gb); /* bit_rate_value_minus1 */
123 get_ue_golomb_long(gb); /* cpb_size_value_minus1 */
124 get_bits1(gb); /* cbr_flag */
126 sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1;
127 sps->cpb_removal_delay_length = get_bits(gb, 5) + 1;
128 sps->dpb_output_delay_length = get_bits(gb, 5) + 1;
129 sps->time_offset_length = get_bits(gb, 5);
130 sps->cpb_cnt = cpb_count;
134 static inline int decode_vui_parameters(GetBitContext *gb, AVCodecContext *avctx,
137 int aspect_ratio_info_present_flag;
138 unsigned int aspect_ratio_idc;
140 aspect_ratio_info_present_flag = get_bits1(gb);
142 if (aspect_ratio_info_present_flag) {
143 aspect_ratio_idc = get_bits(gb, 8);
144 if (aspect_ratio_idc == EXTENDED_SAR) {
145 sps->sar.num = get_bits(gb, 16);
146 sps->sar.den = get_bits(gb, 16);
147 } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(ff_h264_pixel_aspect)) {
148 sps->sar = ff_h264_pixel_aspect[aspect_ratio_idc];
150 av_log(avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
151 return AVERROR_INVALIDDATA;
158 if (get_bits1(gb)) /* overscan_info_present_flag */
159 get_bits1(gb); /* overscan_appropriate_flag */
161 sps->video_signal_type_present_flag = get_bits1(gb);
162 if (sps->video_signal_type_present_flag) {
163 get_bits(gb, 3); /* video_format */
164 sps->full_range = get_bits1(gb); /* video_full_range_flag */
166 sps->colour_description_present_flag = get_bits1(gb);
167 if (sps->colour_description_present_flag) {
168 sps->color_primaries = get_bits(gb, 8); /* colour_primaries */
169 sps->color_trc = get_bits(gb, 8); /* transfer_characteristics */
170 sps->colorspace = get_bits(gb, 8); /* matrix_coefficients */
172 // Set invalid values to "unspecified"
173 if (!av_color_primaries_name(sps->color_primaries))
174 sps->color_primaries = AVCOL_PRI_UNSPECIFIED;
175 if (!av_color_transfer_name(sps->color_trc))
176 sps->color_trc = AVCOL_TRC_UNSPECIFIED;
177 if (!av_color_space_name(sps->colorspace))
178 sps->colorspace = AVCOL_SPC_UNSPECIFIED;
182 /* chroma_location_info_present_flag */
184 /* chroma_sample_location_type_top_field */
185 avctx->chroma_sample_location = get_ue_golomb(gb) + 1;
186 get_ue_golomb(gb); /* chroma_sample_location_type_bottom_field */
189 if (show_bits1(gb) && get_bits_left(gb) < 10) {
190 av_log(avctx, AV_LOG_WARNING, "Truncated VUI\n");
194 sps->timing_info_present_flag = get_bits1(gb);
195 if (sps->timing_info_present_flag) {
196 unsigned num_units_in_tick = get_bits_long(gb, 32);
197 unsigned time_scale = get_bits_long(gb, 32);
198 if (!num_units_in_tick || !time_scale) {
199 av_log(avctx, AV_LOG_ERROR,
200 "time_scale/num_units_in_tick invalid or unsupported (%u/%u)\n",
201 time_scale, num_units_in_tick);
202 sps->timing_info_present_flag = 0;
204 sps->num_units_in_tick = num_units_in_tick;
205 sps->time_scale = time_scale;
207 sps->fixed_frame_rate_flag = get_bits1(gb);
210 sps->nal_hrd_parameters_present_flag = get_bits1(gb);
211 if (sps->nal_hrd_parameters_present_flag)
212 if (decode_hrd_parameters(gb, avctx, sps) < 0)
213 return AVERROR_INVALIDDATA;
214 sps->vcl_hrd_parameters_present_flag = get_bits1(gb);
215 if (sps->vcl_hrd_parameters_present_flag)
216 if (decode_hrd_parameters(gb, avctx, sps) < 0)
217 return AVERROR_INVALIDDATA;
218 if (sps->nal_hrd_parameters_present_flag ||
219 sps->vcl_hrd_parameters_present_flag)
220 get_bits1(gb); /* low_delay_hrd_flag */
221 sps->pic_struct_present_flag = get_bits1(gb);
222 if (!get_bits_left(gb))
224 sps->bitstream_restriction_flag = get_bits1(gb);
225 if (sps->bitstream_restriction_flag) {
226 get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */
227 get_ue_golomb(gb); /* max_bytes_per_pic_denom */
228 get_ue_golomb(gb); /* max_bits_per_mb_denom */
229 get_ue_golomb(gb); /* log2_max_mv_length_horizontal */
230 get_ue_golomb(gb); /* log2_max_mv_length_vertical */
231 sps->num_reorder_frames = get_ue_golomb(gb);
232 get_ue_golomb(gb); /*max_dec_frame_buffering*/
234 if (get_bits_left(gb) < 0) {
235 sps->num_reorder_frames = 0;
236 sps->bitstream_restriction_flag = 0;
239 if (sps->num_reorder_frames > 16U
240 /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
241 av_log(avctx, AV_LOG_ERROR,
242 "Clipping illegal num_reorder_frames %d\n",
243 sps->num_reorder_frames);
244 sps->num_reorder_frames = 16;
245 return AVERROR_INVALIDDATA;
252 static int decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
253 const uint8_t *jvt_list,
254 const uint8_t *fallback_list)
256 int i, last = 8, next = 8;
257 const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
258 if (!get_bits1(gb)) /* matrix not written, we use the predicted one */
259 memcpy(factors, fallback_list, size * sizeof(uint8_t));
261 for (i = 0; i < size; i++) {
263 int v = get_se_golomb(gb);
264 if (v < -128 || v > 127) {
265 av_log(NULL, AV_LOG_ERROR, "delta scale %d is invalid\n", v);
266 return AVERROR_INVALIDDATA;
268 next = (last + v) & 0xff;
270 if (!i && !next) { /* matrix not written, we use the preset one */
271 memcpy(factors, jvt_list, size * sizeof(uint8_t));
274 last = factors[scan[i]] = next ? next : last;
279 /* returns non zero if the provided SPS scaling matrix has been filled */
280 static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps,
281 const PPS *pps, int is_sps,
282 uint8_t(*scaling_matrix4)[16],
283 uint8_t(*scaling_matrix8)[64])
285 int fallback_sps = !is_sps && sps->scaling_matrix_present;
286 const uint8_t *fallback[4] = {
287 fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
288 fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
289 fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
290 fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
294 ret |= decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
295 ret |= decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
296 ret |= decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
297 ret |= decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
298 ret |= decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
299 ret |= decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
300 if (is_sps || pps->transform_8x8_mode) {
301 ret |= decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
302 ret |= decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
303 if (sps->chroma_format_idc == 3) {
304 ret |= decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
305 ret |= decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
306 ret |= decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
307 ret |= decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
317 void ff_h264_ps_uninit(H264ParamSets *ps)
321 for (i = 0; i < MAX_SPS_COUNT; i++)
322 av_buffer_unref(&ps->sps_list[i]);
324 for (i = 0; i < MAX_PPS_COUNT; i++)
325 av_buffer_unref(&ps->pps_list[i]);
327 av_buffer_unref(&ps->sps_ref);
328 av_buffer_unref(&ps->pps_ref);
334 int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
335 H264ParamSets *ps, int ignore_truncation)
337 AVBufferRef *sps_buf;
338 int profile_idc, level_idc, constraint_set_flags = 0;
340 int i, log2_max_frame_num_minus4;
344 sps_buf = av_buffer_allocz(sizeof(*sps));
346 return AVERROR(ENOMEM);
347 sps = (SPS*)sps_buf->data;
349 sps->data_size = gb->buffer_end - gb->buffer;
350 if (sps->data_size > sizeof(sps->data)) {
351 av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized SPS\n");
352 sps->data_size = sizeof(sps->data);
354 memcpy(sps->data, gb->buffer, sps->data_size);
356 profile_idc = get_bits(gb, 8);
357 constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
358 constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
359 constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag
360 constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag
361 constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag
362 constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag
363 skip_bits(gb, 2); // reserved_zero_2bits
364 level_idc = get_bits(gb, 8);
365 sps_id = get_ue_golomb_31(gb);
367 if (sps_id >= MAX_SPS_COUNT) {
368 av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
372 sps->sps_id = sps_id;
373 sps->time_offset_length = 24;
374 sps->profile_idc = profile_idc;
375 sps->constraint_set_flags = constraint_set_flags;
376 sps->level_idc = level_idc;
377 sps->full_range = -1;
379 memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
380 memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
381 sps->scaling_matrix_present = 0;
382 sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
384 if (sps->profile_idc == 100 || // High profile
385 sps->profile_idc == 110 || // High10 profile
386 sps->profile_idc == 122 || // High422 profile
387 sps->profile_idc == 244 || // High444 Predictive profile
388 sps->profile_idc == 44 || // Cavlc444 profile
389 sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
390 sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
391 sps->profile_idc == 118 || // Stereo High profile (MVC)
392 sps->profile_idc == 128 || // Multiview High profile (MVC)
393 sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
394 sps->profile_idc == 144) { // old High444 profile
395 sps->chroma_format_idc = get_ue_golomb_31(gb);
396 if (sps->chroma_format_idc > 3U) {
397 avpriv_request_sample(avctx, "chroma_format_idc %u",
398 sps->chroma_format_idc);
400 } else if (sps->chroma_format_idc == 3) {
401 sps->residual_color_transform_flag = get_bits1(gb);
402 if (sps->residual_color_transform_flag) {
403 av_log(avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
407 sps->bit_depth_luma = get_ue_golomb(gb) + 8;
408 sps->bit_depth_chroma = get_ue_golomb(gb) + 8;
409 if (sps->bit_depth_chroma != sps->bit_depth_luma) {
410 avpriv_request_sample(avctx,
411 "Different chroma and luma bit depth");
414 if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 ||
415 sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
416 av_log(avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
417 sps->bit_depth_luma, sps->bit_depth_chroma);
420 sps->transform_bypass = get_bits1(gb);
421 ret = decode_scaling_matrices(gb, sps, NULL, 1,
422 sps->scaling_matrix4, sps->scaling_matrix8);
425 sps->scaling_matrix_present |= ret;
427 sps->chroma_format_idc = 1;
428 sps->bit_depth_luma = 8;
429 sps->bit_depth_chroma = 8;
432 log2_max_frame_num_minus4 = get_ue_golomb(gb);
433 if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
434 log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
435 av_log(avctx, AV_LOG_ERROR,
436 "log2_max_frame_num_minus4 out of range (0-12): %d\n",
437 log2_max_frame_num_minus4);
440 sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
442 sps->poc_type = get_ue_golomb_31(gb);
444 if (sps->poc_type == 0) { // FIXME #define
445 unsigned t = get_ue_golomb(gb);
447 av_log(avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
450 sps->log2_max_poc_lsb = t + 4;
451 } else if (sps->poc_type == 1) { // FIXME #define
452 sps->delta_pic_order_always_zero_flag = get_bits1(gb);
453 sps->offset_for_non_ref_pic = get_se_golomb(gb);
454 sps->offset_for_top_to_bottom_field = get_se_golomb(gb);
455 sps->poc_cycle_length = get_ue_golomb(gb);
457 if ((unsigned)sps->poc_cycle_length >=
458 FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
459 av_log(avctx, AV_LOG_ERROR,
460 "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
464 for (i = 0; i < sps->poc_cycle_length; i++)
465 sps->offset_for_ref_frame[i] = get_se_golomb(gb);
466 } else if (sps->poc_type != 2) {
467 av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
471 sps->ref_frame_count = get_ue_golomb_31(gb);
472 if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
473 sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
474 if (sps->ref_frame_count > MAX_DELAYED_PIC_COUNT) {
475 av_log(avctx, AV_LOG_ERROR,
476 "too many reference frames %d\n", sps->ref_frame_count);
479 sps->gaps_in_frame_num_allowed_flag = get_bits1(gb);
480 sps->mb_width = get_ue_golomb(gb) + 1;
481 sps->mb_height = get_ue_golomb(gb) + 1;
483 sps->frame_mbs_only_flag = get_bits1(gb);
485 if (sps->mb_height >= INT_MAX / 2U) {
486 av_log(avctx, AV_LOG_ERROR, "height overflow\n");
489 sps->mb_height *= 2 - sps->frame_mbs_only_flag;
491 if (!sps->frame_mbs_only_flag)
492 sps->mb_aff = get_bits1(gb);
496 if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
497 (unsigned)sps->mb_height >= INT_MAX / 16 ||
498 av_image_check_size(16 * sps->mb_width,
499 16 * sps->mb_height, 0, avctx)) {
500 av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
504 sps->direct_8x8_inference_flag = get_bits1(gb);
506 #ifndef ALLOW_INTERLACE
508 av_log(avctx, AV_LOG_ERROR,
509 "MBAFF support not included; enable it at compile-time.\n");
511 sps->crop = get_bits1(gb);
513 unsigned int crop_left = get_ue_golomb(gb);
514 unsigned int crop_right = get_ue_golomb(gb);
515 unsigned int crop_top = get_ue_golomb(gb);
516 unsigned int crop_bottom = get_ue_golomb(gb);
517 int width = 16 * sps->mb_width;
518 int height = 16 * sps->mb_height;
520 if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
521 av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
522 "values are l:%d r:%d t:%d b:%d\n",
523 crop_left, crop_right, crop_top, crop_bottom);
528 sps->crop_bottom = 0;
530 int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
531 int hsub = (sps->chroma_format_idc == 1 ||
532 sps->chroma_format_idc == 2) ? 1 : 0;
533 int step_x = 1 << hsub;
534 int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
536 if (crop_left > (unsigned)INT_MAX / 4 / step_x ||
537 crop_right > (unsigned)INT_MAX / 4 / step_x ||
538 crop_top > (unsigned)INT_MAX / 4 / step_y ||
539 crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
540 (crop_left + crop_right ) * step_x >= width ||
541 (crop_top + crop_bottom) * step_y >= height
543 av_log(avctx, AV_LOG_ERROR, "crop values invalid %d %d %d %d / %d %d\n", crop_left, crop_right, crop_top, crop_bottom, width, height);
547 sps->crop_left = crop_left * step_x;
548 sps->crop_right = crop_right * step_x;
549 sps->crop_top = crop_top * step_y;
550 sps->crop_bottom = crop_bottom * step_y;
560 sps->vui_parameters_present_flag = get_bits1(gb);
561 if (sps->vui_parameters_present_flag) {
562 int ret = decode_vui_parameters(gb, avctx, sps);
567 if (get_bits_left(gb) < 0) {
568 av_log(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR,
569 "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
570 if (!ignore_truncation)
574 /* if the maximum delay is not stored in the SPS, derive it based on the
576 if (!sps->bitstream_restriction_flag &&
577 (sps->ref_frame_count || avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT)) {
578 sps->num_reorder_frames = MAX_DELAYED_PIC_COUNT - 1;
579 for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
580 if (level_max_dpb_mbs[i][0] == sps->level_idc) {
581 sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
582 sps->num_reorder_frames);
591 if (avctx->debug & FF_DEBUG_PICT_INFO) {
592 static const char csp[4][5] = { "Gray", "420", "422", "444" };
593 av_log(avctx, AV_LOG_DEBUG,
594 "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",
595 sps_id, sps->profile_idc, sps->level_idc,
597 sps->ref_frame_count,
598 sps->mb_width, sps->mb_height,
599 sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
600 sps->direct_8x8_inference_flag ? "8B8" : "",
601 sps->crop_left, sps->crop_right,
602 sps->crop_top, sps->crop_bottom,
603 sps->vui_parameters_present_flag ? "VUI" : "",
604 csp[sps->chroma_format_idc],
605 sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
606 sps->timing_info_present_flag ? sps->time_scale : 0,
608 sps->bitstream_restriction_flag ? sps->num_reorder_frames : -1
612 /* check if this is a repeat of an already parsed SPS, then keep the
614 * otherwise drop all PPSes that depend on it */
615 if (ps->sps_list[sps_id] &&
616 !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
617 av_buffer_unref(&sps_buf);
619 remove_sps(ps, sps_id);
620 ps->sps_list[sps_id] = sps_buf;
626 av_buffer_unref(&sps_buf);
627 return AVERROR_INVALIDDATA;
630 static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
633 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
635 for (i = 0; i < 6; i++) {
636 pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
637 for (j = 0; j < i; j++)
638 if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
639 64 * sizeof(uint8_t))) {
640 pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
646 for (q = 0; q < max_qp + 1; q++) {
647 int shift = ff_h264_quant_div6[q];
648 int idx = ff_h264_quant_rem6[q];
649 for (x = 0; x < 64; x++)
650 pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
651 ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
652 pps->scaling_matrix8[i][x]) << shift;
657 static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
660 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
661 for (i = 0; i < 6; i++) {
662 pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
663 for (j = 0; j < i; j++)
664 if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
665 16 * sizeof(uint8_t))) {
666 pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
672 for (q = 0; q < max_qp + 1; q++) {
673 int shift = ff_h264_quant_div6[q] + 2;
674 int idx = ff_h264_quant_rem6[q];
675 for (x = 0; x < 16; x++)
676 pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
677 ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
678 pps->scaling_matrix4[i][x]) << shift;
683 static void init_dequant_tables(PPS *pps, const SPS *sps)
686 init_dequant4_coeff_table(pps, sps);
687 memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
689 if (pps->transform_8x8_mode)
690 init_dequant8_coeff_table(pps, sps);
691 if (sps->transform_bypass) {
692 for (i = 0; i < 6; i++)
693 for (x = 0; x < 16; x++)
694 pps->dequant4_coeff[i][0][x] = 1 << 6;
695 if (pps->transform_8x8_mode)
696 for (i = 0; i < 6; i++)
697 for (x = 0; x < 64; x++)
698 pps->dequant8_coeff[i][0][x] = 1 << 6;
702 static void build_qp_table(PPS *pps, int t, int index, const int depth)
705 const int max_qp = 51 + 6 * (depth - 8);
706 for (i = 0; i < max_qp + 1; i++)
707 pps->chroma_qp_table[t][i] =
708 ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
711 static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
713 int profile_idc = sps->profile_idc;
715 if ((profile_idc == 66 || profile_idc == 77 ||
716 profile_idc == 88) && (sps->constraint_set_flags & 7)) {
717 av_log(logctx, AV_LOG_VERBOSE,
718 "Current profile doesn't provide more RBSP data in PPS, skipping\n");
725 int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
726 H264ParamSets *ps, int bit_length)
728 AVBufferRef *pps_buf;
730 unsigned int pps_id = get_ue_golomb(gb);
736 if (pps_id >= MAX_PPS_COUNT) {
737 av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
738 return AVERROR_INVALIDDATA;
741 pps_buf = av_buffer_allocz(sizeof(*pps));
743 return AVERROR(ENOMEM);
744 pps = (PPS*)pps_buf->data;
746 pps->data_size = gb->buffer_end - gb->buffer;
747 if (pps->data_size > sizeof(pps->data)) {
748 av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized PPS "
749 "(%"SIZE_SPECIFIER" > %"SIZE_SPECIFIER")\n",
750 pps->data_size, sizeof(pps->data));
751 pps->data_size = sizeof(pps->data);
753 memcpy(pps->data, gb->buffer, pps->data_size);
755 pps->sps_id = get_ue_golomb_31(gb);
756 if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
757 !ps->sps_list[pps->sps_id]) {
758 av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
759 ret = AVERROR_INVALIDDATA;
762 sps = (const SPS*)ps->sps_list[pps->sps_id]->data;
763 if (sps->bit_depth_luma > 14) {
764 av_log(avctx, AV_LOG_ERROR,
765 "Invalid luma bit depth=%d\n",
766 sps->bit_depth_luma);
767 ret = AVERROR_INVALIDDATA;
769 } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
770 avpriv_report_missing_feature(avctx,
771 "Unimplemented luma bit depth=%d",
772 sps->bit_depth_luma);
773 ret = AVERROR_PATCHWELCOME;
777 pps->cabac = get_bits1(gb);
778 pps->pic_order_present = get_bits1(gb);
779 pps->slice_group_count = get_ue_golomb(gb) + 1;
780 if (pps->slice_group_count > 1) {
781 pps->mb_slice_group_map_type = get_ue_golomb(gb);
782 av_log(avctx, AV_LOG_ERROR, "FMO not supported\n");
784 pps->ref_count[0] = get_ue_golomb(gb) + 1;
785 pps->ref_count[1] = get_ue_golomb(gb) + 1;
786 if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
787 av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
788 ret = AVERROR_INVALIDDATA;
792 qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
794 pps->weighted_pred = get_bits1(gb);
795 pps->weighted_bipred_idc = get_bits(gb, 2);
796 pps->init_qp = get_se_golomb(gb) + 26U + qp_bd_offset;
797 pps->init_qs = get_se_golomb(gb) + 26U + qp_bd_offset;
798 pps->chroma_qp_index_offset[0] = get_se_golomb(gb);
799 if (pps->chroma_qp_index_offset[0] < -12 || pps->chroma_qp_index_offset[0] > 12) {
800 ret = AVERROR_INVALIDDATA;
804 pps->deblocking_filter_parameters_present = get_bits1(gb);
805 pps->constrained_intra_pred = get_bits1(gb);
806 pps->redundant_pic_cnt_present = get_bits1(gb);
808 pps->transform_8x8_mode = 0;
809 memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
810 sizeof(pps->scaling_matrix4));
811 memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
812 sizeof(pps->scaling_matrix8));
814 bits_left = bit_length - get_bits_count(gb);
815 if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
816 pps->transform_8x8_mode = get_bits1(gb);
817 ret = decode_scaling_matrices(gb, sps, pps, 0,
818 pps->scaling_matrix4, pps->scaling_matrix8);
821 // second_chroma_qp_index_offset
822 pps->chroma_qp_index_offset[1] = get_se_golomb(gb);
823 if (pps->chroma_qp_index_offset[1] < -12 || pps->chroma_qp_index_offset[1] > 12) {
824 ret = AVERROR_INVALIDDATA;
828 pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
831 build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
832 sps->bit_depth_luma);
833 build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
834 sps->bit_depth_luma);
836 init_dequant_tables(pps, sps);
838 if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
839 pps->chroma_qp_diff = 1;
841 if (avctx->debug & FF_DEBUG_PICT_INFO) {
842 av_log(avctx, AV_LOG_DEBUG,
843 "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
845 pps->cabac ? "CABAC" : "CAVLC",
846 pps->slice_group_count,
847 pps->ref_count[0], pps->ref_count[1],
848 pps->weighted_pred ? "weighted" : "",
849 pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
850 pps->deblocking_filter_parameters_present ? "LPAR" : "",
851 pps->constrained_intra_pred ? "CONSTR" : "",
852 pps->redundant_pic_cnt_present ? "REDU" : "",
853 pps->transform_8x8_mode ? "8x8DCT" : "");
856 remove_pps(ps, pps_id);
857 ps->pps_list[pps_id] = pps_buf;
862 av_buffer_unref(&pps_buf);