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 MIN_LOG2_MAX_FRAME_NUM 4
40 #define EXTENDED_SAR 255
42 static const uint8_t default_scaling4[2][16] = {
43 { 6, 13, 20, 28, 13, 20, 28, 32,
44 20, 28, 32, 37, 28, 32, 37, 42 },
45 { 10, 14, 20, 24, 14, 20, 24, 27,
46 20, 24, 27, 30, 24, 27, 30, 34 }
49 static const uint8_t default_scaling8[2][64] = {
50 { 6, 10, 13, 16, 18, 23, 25, 27,
51 10, 11, 16, 18, 23, 25, 27, 29,
52 13, 16, 18, 23, 25, 27, 29, 31,
53 16, 18, 23, 25, 27, 29, 31, 33,
54 18, 23, 25, 27, 29, 31, 33, 36,
55 23, 25, 27, 29, 31, 33, 36, 38,
56 25, 27, 29, 31, 33, 36, 38, 40,
57 27, 29, 31, 33, 36, 38, 40, 42 },
58 { 9, 13, 15, 17, 19, 21, 22, 24,
59 13, 13, 17, 19, 21, 22, 24, 25,
60 15, 17, 19, 21, 22, 24, 25, 27,
61 17, 19, 21, 22, 24, 25, 27, 28,
62 19, 21, 22, 24, 25, 27, 28, 30,
63 21, 22, 24, 25, 27, 28, 30, 32,
64 22, 24, 25, 27, 28, 30, 32, 33,
65 24, 25, 27, 28, 30, 32, 33, 35 }
68 /* maximum number of MBs in the DPB for a given level */
69 static const int level_max_dpb_mbs[][2] = {
88 static void remove_pps(H264ParamSets *s, int id)
90 av_buffer_unref(&s->pps_list[id]);
93 static void remove_sps(H264ParamSets *s, int id)
97 if (s->sps_list[id]) {
98 /* drop all PPS that depend on this SPS */
99 for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
100 if (s->pps_list[i] && ((PPS*)s->pps_list[i]->data)->sps_id == id)
104 av_buffer_unref(&s->sps_list[id]);
107 static inline int decode_hrd_parameters(GetBitContext *gb, void *logctx,
111 cpb_count = get_ue_golomb_31(gb) + 1;
113 if (cpb_count > 32U) {
114 av_log(logctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
115 return AVERROR_INVALIDDATA;
118 get_bits(gb, 4); /* bit_rate_scale */
119 get_bits(gb, 4); /* cpb_size_scale */
120 for (i = 0; i < cpb_count; i++) {
121 get_ue_golomb_long(gb); /* bit_rate_value_minus1 */
122 get_ue_golomb_long(gb); /* cpb_size_value_minus1 */
123 get_bits1(gb); /* cbr_flag */
125 sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1;
126 sps->cpb_removal_delay_length = get_bits(gb, 5) + 1;
127 sps->dpb_output_delay_length = get_bits(gb, 5) + 1;
128 sps->time_offset_length = get_bits(gb, 5);
129 sps->cpb_cnt = cpb_count;
133 static inline int decode_vui_parameters(GetBitContext *gb, void *logctx,
136 int aspect_ratio_info_present_flag;
137 unsigned int aspect_ratio_idc;
139 aspect_ratio_info_present_flag = get_bits1(gb);
141 if (aspect_ratio_info_present_flag) {
142 aspect_ratio_idc = get_bits(gb, 8);
143 if (aspect_ratio_idc == EXTENDED_SAR) {
144 sps->sar.num = get_bits(gb, 16);
145 sps->sar.den = get_bits(gb, 16);
146 } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(ff_h264_pixel_aspect)) {
147 sps->sar = ff_h264_pixel_aspect[aspect_ratio_idc];
149 av_log(logctx, AV_LOG_ERROR, "illegal aspect ratio\n");
150 return AVERROR_INVALIDDATA;
157 if (get_bits1(gb)) /* overscan_info_present_flag */
158 get_bits1(gb); /* overscan_appropriate_flag */
160 sps->video_signal_type_present_flag = get_bits1(gb);
161 if (sps->video_signal_type_present_flag) {
162 get_bits(gb, 3); /* video_format */
163 sps->full_range = get_bits1(gb); /* video_full_range_flag */
165 sps->colour_description_present_flag = get_bits1(gb);
166 if (sps->colour_description_present_flag) {
167 sps->color_primaries = get_bits(gb, 8); /* colour_primaries */
168 sps->color_trc = get_bits(gb, 8); /* transfer_characteristics */
169 sps->colorspace = get_bits(gb, 8); /* matrix_coefficients */
171 // Set invalid values to "unspecified"
172 if (!av_color_primaries_name(sps->color_primaries))
173 sps->color_primaries = AVCOL_PRI_UNSPECIFIED;
174 if (!av_color_transfer_name(sps->color_trc))
175 sps->color_trc = AVCOL_TRC_UNSPECIFIED;
176 if (!av_color_space_name(sps->colorspace))
177 sps->colorspace = AVCOL_SPC_UNSPECIFIED;
181 /* chroma_location_info_present_flag */
183 /* chroma_sample_location_type_top_field */
184 sps->chroma_location = get_ue_golomb(gb) + 1;
185 get_ue_golomb(gb); /* chroma_sample_location_type_bottom_field */
187 sps->chroma_location = AVCHROMA_LOC_LEFT;
189 if (show_bits1(gb) && get_bits_left(gb) < 10) {
190 av_log(logctx, AV_LOG_WARNING, "Truncated VUI (%d)\n", get_bits_left(gb));
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(logctx, 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, logctx, 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, logctx, 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(logctx, 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_DEBUG, "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_long(gb);
454 sps->offset_for_top_to_bottom_field = get_se_golomb_long(gb);
456 if ( sps->offset_for_non_ref_pic == INT32_MIN
457 || sps->offset_for_top_to_bottom_field == INT32_MIN
459 av_log(avctx, AV_LOG_ERROR,
460 "offset_for_non_ref_pic or offset_for_top_to_bottom_field is out of range\n");
464 sps->poc_cycle_length = get_ue_golomb(gb);
466 if ((unsigned)sps->poc_cycle_length >=
467 FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
468 av_log(avctx, AV_LOG_ERROR,
469 "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
473 for (i = 0; i < sps->poc_cycle_length; i++) {
474 sps->offset_for_ref_frame[i] = get_se_golomb_long(gb);
475 if (sps->offset_for_ref_frame[i] == INT32_MIN) {
476 av_log(avctx, AV_LOG_ERROR,
477 "offset_for_ref_frame is out of range\n");
481 } else if (sps->poc_type != 2) {
482 av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
486 sps->ref_frame_count = get_ue_golomb_31(gb);
487 if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
488 sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
489 if (sps->ref_frame_count > MAX_DELAYED_PIC_COUNT) {
490 av_log(avctx, AV_LOG_ERROR,
491 "too many reference frames %d\n", sps->ref_frame_count);
494 sps->gaps_in_frame_num_allowed_flag = get_bits1(gb);
495 sps->mb_width = get_ue_golomb(gb) + 1;
496 sps->mb_height = get_ue_golomb(gb) + 1;
498 sps->frame_mbs_only_flag = get_bits1(gb);
500 if (sps->mb_height >= INT_MAX / 2U) {
501 av_log(avctx, AV_LOG_ERROR, "height overflow\n");
504 sps->mb_height *= 2 - sps->frame_mbs_only_flag;
506 if (!sps->frame_mbs_only_flag)
507 sps->mb_aff = get_bits1(gb);
511 if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
512 (unsigned)sps->mb_height >= INT_MAX / 16 ||
513 av_image_check_size(16 * sps->mb_width,
514 16 * sps->mb_height, 0, avctx)) {
515 av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
519 sps->direct_8x8_inference_flag = get_bits1(gb);
521 #ifndef ALLOW_INTERLACE
523 av_log(avctx, AV_LOG_ERROR,
524 "MBAFF support not included; enable it at compile-time.\n");
526 sps->crop = get_bits1(gb);
528 unsigned int crop_left = get_ue_golomb(gb);
529 unsigned int crop_right = get_ue_golomb(gb);
530 unsigned int crop_top = get_ue_golomb(gb);
531 unsigned int crop_bottom = get_ue_golomb(gb);
532 int width = 16 * sps->mb_width;
533 int height = 16 * sps->mb_height;
535 if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
536 av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
537 "values are l:%d r:%d t:%d b:%d\n",
538 crop_left, crop_right, crop_top, crop_bottom);
543 sps->crop_bottom = 0;
545 int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
546 int hsub = (sps->chroma_format_idc == 1 ||
547 sps->chroma_format_idc == 2) ? 1 : 0;
548 int step_x = 1 << hsub;
549 int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
551 if (crop_left > (unsigned)INT_MAX / 4 / step_x ||
552 crop_right > (unsigned)INT_MAX / 4 / step_x ||
553 crop_top > (unsigned)INT_MAX / 4 / step_y ||
554 crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
555 (crop_left + crop_right ) * step_x >= width ||
556 (crop_top + crop_bottom) * step_y >= height
558 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);
562 sps->crop_left = crop_left * step_x;
563 sps->crop_right = crop_right * step_x;
564 sps->crop_top = crop_top * step_y;
565 sps->crop_bottom = crop_bottom * step_y;
575 sps->vui_parameters_present_flag = get_bits1(gb);
576 if (sps->vui_parameters_present_flag) {
577 int ret = decode_vui_parameters(gb, avctx, sps);
582 if (get_bits_left(gb) < 0) {
583 av_log_once(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR, AV_LOG_DEBUG,
584 &ps->overread_warning_printed[sps->vui_parameters_present_flag],
585 "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
586 if (!ignore_truncation)
590 /* if the maximum delay is not stored in the SPS, derive it based on the
592 if (!sps->bitstream_restriction_flag &&
593 (sps->ref_frame_count || avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT)) {
594 sps->num_reorder_frames = MAX_DELAYED_PIC_COUNT - 1;
595 for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
596 if (level_max_dpb_mbs[i][0] == sps->level_idc) {
597 sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
598 sps->num_reorder_frames);
607 if (avctx->debug & FF_DEBUG_PICT_INFO) {
608 static const char csp[4][5] = { "Gray", "420", "422", "444" };
609 av_log(avctx, AV_LOG_DEBUG,
610 "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",
611 sps_id, sps->profile_idc, sps->level_idc,
613 sps->ref_frame_count,
614 sps->mb_width, sps->mb_height,
615 sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
616 sps->direct_8x8_inference_flag ? "8B8" : "",
617 sps->crop_left, sps->crop_right,
618 sps->crop_top, sps->crop_bottom,
619 sps->vui_parameters_present_flag ? "VUI" : "",
620 csp[sps->chroma_format_idc],
621 sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
622 sps->timing_info_present_flag ? sps->time_scale : 0,
624 sps->bitstream_restriction_flag ? sps->num_reorder_frames : -1
628 /* check if this is a repeat of an already parsed SPS, then keep the
630 * otherwise drop all PPSes that depend on it */
631 if (ps->sps_list[sps_id] &&
632 !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
633 av_buffer_unref(&sps_buf);
635 remove_sps(ps, sps_id);
636 ps->sps_list[sps_id] = sps_buf;
642 av_buffer_unref(&sps_buf);
643 return AVERROR_INVALIDDATA;
646 static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
649 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
651 for (i = 0; i < 6; i++) {
652 pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
653 for (j = 0; j < i; j++)
654 if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
655 64 * sizeof(uint8_t))) {
656 pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
662 for (q = 0; q < max_qp + 1; q++) {
663 int shift = ff_h264_quant_div6[q];
664 int idx = ff_h264_quant_rem6[q];
665 for (x = 0; x < 64; x++)
666 pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
667 ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
668 pps->scaling_matrix8[i][x]) << shift;
673 static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
676 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
677 for (i = 0; i < 6; i++) {
678 pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
679 for (j = 0; j < i; j++)
680 if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
681 16 * sizeof(uint8_t))) {
682 pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
688 for (q = 0; q < max_qp + 1; q++) {
689 int shift = ff_h264_quant_div6[q] + 2;
690 int idx = ff_h264_quant_rem6[q];
691 for (x = 0; x < 16; x++)
692 pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
693 ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
694 pps->scaling_matrix4[i][x]) << shift;
699 static void init_dequant_tables(PPS *pps, const SPS *sps)
702 init_dequant4_coeff_table(pps, sps);
703 memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
705 if (pps->transform_8x8_mode)
706 init_dequant8_coeff_table(pps, sps);
707 if (sps->transform_bypass) {
708 for (i = 0; i < 6; i++)
709 for (x = 0; x < 16; x++)
710 pps->dequant4_coeff[i][0][x] = 1 << 6;
711 if (pps->transform_8x8_mode)
712 for (i = 0; i < 6; i++)
713 for (x = 0; x < 64; x++)
714 pps->dequant8_coeff[i][0][x] = 1 << 6;
718 static void build_qp_table(PPS *pps, int t, int index, const int depth)
721 const int max_qp = 51 + 6 * (depth - 8);
722 for (i = 0; i < max_qp + 1; i++)
723 pps->chroma_qp_table[t][i] =
724 ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
727 static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
729 int profile_idc = sps->profile_idc;
731 if ((profile_idc == 66 || profile_idc == 77 ||
732 profile_idc == 88) && (sps->constraint_set_flags & 7)) {
733 av_log(logctx, AV_LOG_VERBOSE,
734 "Current profile doesn't provide more RBSP data in PPS, skipping\n");
741 int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
742 H264ParamSets *ps, int bit_length)
744 AVBufferRef *pps_buf;
746 unsigned int pps_id = get_ue_golomb(gb);
752 if (pps_id >= MAX_PPS_COUNT) {
753 av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
754 return AVERROR_INVALIDDATA;
757 pps_buf = av_buffer_allocz(sizeof(*pps));
759 return AVERROR(ENOMEM);
760 pps = (PPS*)pps_buf->data;
762 pps->data_size = gb->buffer_end - gb->buffer;
763 if (pps->data_size > sizeof(pps->data)) {
764 av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized PPS "
765 "(%"SIZE_SPECIFIER" > %"SIZE_SPECIFIER")\n",
766 pps->data_size, sizeof(pps->data));
767 pps->data_size = sizeof(pps->data);
769 memcpy(pps->data, gb->buffer, pps->data_size);
771 pps->sps_id = get_ue_golomb_31(gb);
772 if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
773 !ps->sps_list[pps->sps_id]) {
774 av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
775 ret = AVERROR_INVALIDDATA;
778 sps = (const SPS*)ps->sps_list[pps->sps_id]->data;
779 if (sps->bit_depth_luma > 14) {
780 av_log(avctx, AV_LOG_ERROR,
781 "Invalid luma bit depth=%d\n",
782 sps->bit_depth_luma);
783 ret = AVERROR_INVALIDDATA;
785 } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
786 avpriv_report_missing_feature(avctx,
787 "Unimplemented luma bit depth=%d",
788 sps->bit_depth_luma);
789 ret = AVERROR_PATCHWELCOME;
793 pps->cabac = get_bits1(gb);
794 pps->pic_order_present = get_bits1(gb);
795 pps->slice_group_count = get_ue_golomb(gb) + 1;
796 if (pps->slice_group_count > 1) {
797 pps->mb_slice_group_map_type = get_ue_golomb(gb);
798 avpriv_report_missing_feature(avctx, "FMO");
799 ret = AVERROR_PATCHWELCOME;
802 pps->ref_count[0] = get_ue_golomb(gb) + 1;
803 pps->ref_count[1] = get_ue_golomb(gb) + 1;
804 if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
805 av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
806 ret = AVERROR_INVALIDDATA;
810 qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
812 pps->weighted_pred = get_bits1(gb);
813 pps->weighted_bipred_idc = get_bits(gb, 2);
814 pps->init_qp = get_se_golomb(gb) + 26U + qp_bd_offset;
815 pps->init_qs = get_se_golomb(gb) + 26U + qp_bd_offset;
816 pps->chroma_qp_index_offset[0] = get_se_golomb(gb);
817 if (pps->chroma_qp_index_offset[0] < -12 || pps->chroma_qp_index_offset[0] > 12) {
818 ret = AVERROR_INVALIDDATA;
822 pps->deblocking_filter_parameters_present = get_bits1(gb);
823 pps->constrained_intra_pred = get_bits1(gb);
824 pps->redundant_pic_cnt_present = get_bits1(gb);
826 pps->transform_8x8_mode = 0;
827 memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
828 sizeof(pps->scaling_matrix4));
829 memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
830 sizeof(pps->scaling_matrix8));
832 bits_left = bit_length - get_bits_count(gb);
833 if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
834 pps->transform_8x8_mode = get_bits1(gb);
835 ret = decode_scaling_matrices(gb, sps, pps, 0,
836 pps->scaling_matrix4, pps->scaling_matrix8);
839 // second_chroma_qp_index_offset
840 pps->chroma_qp_index_offset[1] = get_se_golomb(gb);
841 if (pps->chroma_qp_index_offset[1] < -12 || pps->chroma_qp_index_offset[1] > 12) {
842 ret = AVERROR_INVALIDDATA;
846 pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
849 build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
850 sps->bit_depth_luma);
851 build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
852 sps->bit_depth_luma);
854 init_dequant_tables(pps, sps);
856 if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
857 pps->chroma_qp_diff = 1;
859 if (avctx->debug & FF_DEBUG_PICT_INFO) {
860 av_log(avctx, AV_LOG_DEBUG,
861 "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
863 pps->cabac ? "CABAC" : "CAVLC",
864 pps->slice_group_count,
865 pps->ref_count[0], pps->ref_count[1],
866 pps->weighted_pred ? "weighted" : "",
867 pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
868 pps->deblocking_filter_parameters_present ? "LPAR" : "",
869 pps->constrained_intra_pred ? "CONSTR" : "",
870 pps->redundant_pic_cnt_present ? "REDU" : "",
871 pps->transform_8x8_mode ? "8x8DCT" : "");
874 remove_pps(ps, pps_id);
875 ps->pps_list[pps_id] = pps_buf;
880 av_buffer_unref(&pps_buf);