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 static const uint8_t default_scaling4[2][16] = {
42 { 6, 13, 20, 28, 13, 20, 28, 32,
43 20, 28, 32, 37, 28, 32, 37, 42 },
44 { 10, 14, 20, 24, 14, 20, 24, 27,
45 20, 24, 27, 30, 24, 27, 30, 34 }
48 static const uint8_t default_scaling8[2][64] = {
49 { 6, 10, 13, 16, 18, 23, 25, 27,
50 10, 11, 16, 18, 23, 25, 27, 29,
51 13, 16, 18, 23, 25, 27, 29, 31,
52 16, 18, 23, 25, 27, 29, 31, 33,
53 18, 23, 25, 27, 29, 31, 33, 36,
54 23, 25, 27, 29, 31, 33, 36, 38,
55 25, 27, 29, 31, 33, 36, 38, 40,
56 27, 29, 31, 33, 36, 38, 40, 42 },
57 { 9, 13, 15, 17, 19, 21, 22, 24,
58 13, 13, 17, 19, 21, 22, 24, 25,
59 15, 17, 19, 21, 22, 24, 25, 27,
60 17, 19, 21, 22, 24, 25, 27, 28,
61 19, 21, 22, 24, 25, 27, 28, 30,
62 21, 22, 24, 25, 27, 28, 30, 32,
63 22, 24, 25, 27, 28, 30, 32, 33,
64 24, 25, 27, 28, 30, 32, 33, 35 }
67 /* maximum number of MBs in the DPB for a given level */
68 static const int level_max_dpb_mbs[][2] = {
87 static void remove_pps(H264ParamSets *s, int id)
89 av_buffer_unref(&s->pps_list[id]);
92 static void remove_sps(H264ParamSets *s, int id)
96 if (s->sps_list[id]) {
97 /* drop all PPS that depend on this SPS */
98 for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
99 if (s->pps_list[i] && ((PPS*)s->pps_list[i]->data)->sps_id == id)
103 av_buffer_unref(&s->sps_list[id]);
106 static inline int decode_hrd_parameters(GetBitContext *gb, AVCodecContext *avctx,
110 cpb_count = get_ue_golomb_31(gb) + 1;
112 if (cpb_count > 32U) {
113 av_log(avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
114 return AVERROR_INVALIDDATA;
117 get_bits(gb, 4); /* bit_rate_scale */
118 get_bits(gb, 4); /* cpb_size_scale */
119 for (i = 0; i < cpb_count; i++) {
120 get_ue_golomb_long(gb); /* bit_rate_value_minus1 */
121 get_ue_golomb_long(gb); /* cpb_size_value_minus1 */
122 get_bits1(gb); /* cbr_flag */
124 sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1;
125 sps->cpb_removal_delay_length = get_bits(gb, 5) + 1;
126 sps->dpb_output_delay_length = get_bits(gb, 5) + 1;
127 sps->time_offset_length = get_bits(gb, 5);
128 sps->cpb_cnt = cpb_count;
132 static inline int decode_vui_parameters(GetBitContext *gb, AVCodecContext *avctx,
135 int aspect_ratio_info_present_flag;
136 unsigned int aspect_ratio_idc;
138 aspect_ratio_info_present_flag = get_bits1(gb);
140 if (aspect_ratio_info_present_flag) {
141 aspect_ratio_idc = get_bits(gb, 8);
142 if (aspect_ratio_idc == EXTENDED_SAR) {
143 sps->sar.num = get_bits(gb, 16);
144 sps->sar.den = get_bits(gb, 16);
145 } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(ff_h264_pixel_aspect)) {
146 sps->sar = ff_h264_pixel_aspect[aspect_ratio_idc];
148 av_log(avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
149 return AVERROR_INVALIDDATA;
156 if (get_bits1(gb)) /* overscan_info_present_flag */
157 get_bits1(gb); /* overscan_appropriate_flag */
159 sps->video_signal_type_present_flag = get_bits1(gb);
160 if (sps->video_signal_type_present_flag) {
161 get_bits(gb, 3); /* video_format */
162 sps->full_range = get_bits1(gb); /* video_full_range_flag */
164 sps->colour_description_present_flag = get_bits1(gb);
165 if (sps->colour_description_present_flag) {
166 sps->color_primaries = get_bits(gb, 8); /* colour_primaries */
167 sps->color_trc = get_bits(gb, 8); /* transfer_characteristics */
168 sps->colorspace = get_bits(gb, 8); /* matrix_coefficients */
169 if (sps->color_primaries >= AVCOL_PRI_NB)
170 sps->color_primaries = AVCOL_PRI_UNSPECIFIED;
171 if (sps->color_trc >= AVCOL_TRC_NB)
172 sps->color_trc = AVCOL_TRC_UNSPECIFIED;
173 if (sps->colorspace >= AVCOL_SPC_NB)
174 sps->colorspace = AVCOL_SPC_UNSPECIFIED;
178 /* chroma_location_info_present_flag */
180 /* chroma_sample_location_type_top_field */
181 avctx->chroma_sample_location = get_ue_golomb(gb) + 1;
182 get_ue_golomb(gb); /* chroma_sample_location_type_bottom_field */
185 if (show_bits1(gb) && get_bits_left(gb) < 10) {
186 av_log(avctx, AV_LOG_WARNING, "Truncated VUI\n");
190 sps->timing_info_present_flag = get_bits1(gb);
191 if (sps->timing_info_present_flag) {
192 unsigned num_units_in_tick = get_bits_long(gb, 32);
193 unsigned time_scale = get_bits_long(gb, 32);
194 if (!num_units_in_tick || !time_scale) {
195 av_log(avctx, AV_LOG_ERROR,
196 "time_scale/num_units_in_tick invalid or unsupported (%u/%u)\n",
197 time_scale, num_units_in_tick);
198 sps->timing_info_present_flag = 0;
200 sps->num_units_in_tick = num_units_in_tick;
201 sps->time_scale = time_scale;
203 sps->fixed_frame_rate_flag = get_bits1(gb);
206 sps->nal_hrd_parameters_present_flag = get_bits1(gb);
207 if (sps->nal_hrd_parameters_present_flag)
208 if (decode_hrd_parameters(gb, avctx, sps) < 0)
209 return AVERROR_INVALIDDATA;
210 sps->vcl_hrd_parameters_present_flag = get_bits1(gb);
211 if (sps->vcl_hrd_parameters_present_flag)
212 if (decode_hrd_parameters(gb, avctx, sps) < 0)
213 return AVERROR_INVALIDDATA;
214 if (sps->nal_hrd_parameters_present_flag ||
215 sps->vcl_hrd_parameters_present_flag)
216 get_bits1(gb); /* low_delay_hrd_flag */
217 sps->pic_struct_present_flag = get_bits1(gb);
218 if (!get_bits_left(gb))
220 sps->bitstream_restriction_flag = get_bits1(gb);
221 if (sps->bitstream_restriction_flag) {
222 get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */
223 get_ue_golomb(gb); /* max_bytes_per_pic_denom */
224 get_ue_golomb(gb); /* max_bits_per_mb_denom */
225 get_ue_golomb(gb); /* log2_max_mv_length_horizontal */
226 get_ue_golomb(gb); /* log2_max_mv_length_vertical */
227 sps->num_reorder_frames = get_ue_golomb(gb);
228 get_ue_golomb(gb); /*max_dec_frame_buffering*/
230 if (get_bits_left(gb) < 0) {
231 sps->num_reorder_frames = 0;
232 sps->bitstream_restriction_flag = 0;
235 if (sps->num_reorder_frames > 16U
236 /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
237 av_log(avctx, AV_LOG_ERROR,
238 "Clipping illegal num_reorder_frames %d\n",
239 sps->num_reorder_frames);
240 sps->num_reorder_frames = 16;
241 return AVERROR_INVALIDDATA;
248 static void decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
249 const uint8_t *jvt_list,
250 const uint8_t *fallback_list)
252 int i, last = 8, next = 8;
253 const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
254 if (!get_bits1(gb)) /* matrix not written, we use the predicted one */
255 memcpy(factors, fallback_list, size * sizeof(uint8_t));
257 for (i = 0; i < size; i++) {
259 next = (last + get_se_golomb(gb)) & 0xff;
260 if (!i && !next) { /* matrix not written, we use the preset one */
261 memcpy(factors, jvt_list, size * sizeof(uint8_t));
264 last = factors[scan[i]] = next ? next : last;
268 /* returns non zero if the provided SPS scaling matrix has been filled */
269 static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps,
270 const PPS *pps, int is_sps,
271 uint8_t(*scaling_matrix4)[16],
272 uint8_t(*scaling_matrix8)[64])
274 int fallback_sps = !is_sps && sps->scaling_matrix_present;
275 const uint8_t *fallback[4] = {
276 fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
277 fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
278 fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
279 fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
284 decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
285 decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
286 decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
287 decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
288 decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
289 decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
290 if (is_sps || pps->transform_8x8_mode) {
291 decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
292 decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
293 if (sps->chroma_format_idc == 3) {
294 decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
295 decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
296 decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
297 decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
305 void ff_h264_ps_uninit(H264ParamSets *ps)
309 for (i = 0; i < MAX_SPS_COUNT; i++)
310 av_buffer_unref(&ps->sps_list[i]);
312 for (i = 0; i < MAX_PPS_COUNT; i++)
313 av_buffer_unref(&ps->pps_list[i]);
315 av_buffer_unref(&ps->sps_ref);
316 av_buffer_unref(&ps->pps_ref);
322 int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
323 H264ParamSets *ps, int ignore_truncation)
325 AVBufferRef *sps_buf;
326 int profile_idc, level_idc, constraint_set_flags = 0;
328 int i, log2_max_frame_num_minus4;
331 sps_buf = av_buffer_allocz(sizeof(*sps));
333 return AVERROR(ENOMEM);
334 sps = (SPS*)sps_buf->data;
336 sps->data_size = gb->buffer_end - gb->buffer;
337 if (sps->data_size > sizeof(sps->data)) {
338 av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized SPS\n");
339 sps->data_size = sizeof(sps->data);
341 memcpy(sps->data, gb->buffer, sps->data_size);
343 profile_idc = get_bits(gb, 8);
344 constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
345 constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
346 constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag
347 constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag
348 constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag
349 constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag
350 skip_bits(gb, 2); // reserved_zero_2bits
351 level_idc = get_bits(gb, 8);
352 sps_id = get_ue_golomb_31(gb);
354 if (sps_id >= MAX_SPS_COUNT) {
355 av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
359 sps->sps_id = sps_id;
360 sps->time_offset_length = 24;
361 sps->profile_idc = profile_idc;
362 sps->constraint_set_flags = constraint_set_flags;
363 sps->level_idc = level_idc;
364 sps->full_range = -1;
366 memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
367 memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
368 sps->scaling_matrix_present = 0;
369 sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
371 if (sps->profile_idc == 100 || // High profile
372 sps->profile_idc == 110 || // High10 profile
373 sps->profile_idc == 122 || // High422 profile
374 sps->profile_idc == 244 || // High444 Predictive profile
375 sps->profile_idc == 44 || // Cavlc444 profile
376 sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
377 sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
378 sps->profile_idc == 118 || // Stereo High profile (MVC)
379 sps->profile_idc == 128 || // Multiview High profile (MVC)
380 sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
381 sps->profile_idc == 144) { // old High444 profile
382 sps->chroma_format_idc = get_ue_golomb_31(gb);
383 if (sps->chroma_format_idc > 3U) {
384 avpriv_request_sample(avctx, "chroma_format_idc %u",
385 sps->chroma_format_idc);
387 } else if (sps->chroma_format_idc == 3) {
388 sps->residual_color_transform_flag = get_bits1(gb);
389 if (sps->residual_color_transform_flag) {
390 av_log(avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
394 sps->bit_depth_luma = get_ue_golomb(gb) + 8;
395 sps->bit_depth_chroma = get_ue_golomb(gb) + 8;
396 if (sps->bit_depth_chroma != sps->bit_depth_luma) {
397 avpriv_request_sample(avctx,
398 "Different chroma and luma bit depth");
401 if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 ||
402 sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
403 av_log(avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
404 sps->bit_depth_luma, sps->bit_depth_chroma);
407 sps->transform_bypass = get_bits1(gb);
408 sps->scaling_matrix_present |= decode_scaling_matrices(gb, sps, NULL, 1,
409 sps->scaling_matrix4, sps->scaling_matrix8);
411 sps->chroma_format_idc = 1;
412 sps->bit_depth_luma = 8;
413 sps->bit_depth_chroma = 8;
416 log2_max_frame_num_minus4 = get_ue_golomb(gb);
417 if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
418 log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
419 av_log(avctx, AV_LOG_ERROR,
420 "log2_max_frame_num_minus4 out of range (0-12): %d\n",
421 log2_max_frame_num_minus4);
424 sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
426 sps->poc_type = get_ue_golomb_31(gb);
428 if (sps->poc_type == 0) { // FIXME #define
429 unsigned t = get_ue_golomb(gb);
431 av_log(avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
434 sps->log2_max_poc_lsb = t + 4;
435 } else if (sps->poc_type == 1) { // FIXME #define
436 sps->delta_pic_order_always_zero_flag = get_bits1(gb);
437 sps->offset_for_non_ref_pic = get_se_golomb(gb);
438 sps->offset_for_top_to_bottom_field = get_se_golomb(gb);
439 sps->poc_cycle_length = get_ue_golomb(gb);
441 if ((unsigned)sps->poc_cycle_length >=
442 FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
443 av_log(avctx, AV_LOG_ERROR,
444 "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
448 for (i = 0; i < sps->poc_cycle_length; i++)
449 sps->offset_for_ref_frame[i] = get_se_golomb(gb);
450 } else if (sps->poc_type != 2) {
451 av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
455 sps->ref_frame_count = get_ue_golomb_31(gb);
456 if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
457 sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
458 if (sps->ref_frame_count > H264_MAX_PICTURE_COUNT - 2 ||
459 sps->ref_frame_count > 16U) {
460 av_log(avctx, AV_LOG_ERROR,
461 "too many reference frames %d\n", sps->ref_frame_count);
464 sps->gaps_in_frame_num_allowed_flag = get_bits1(gb);
465 sps->mb_width = get_ue_golomb(gb) + 1;
466 sps->mb_height = get_ue_golomb(gb) + 1;
468 sps->frame_mbs_only_flag = get_bits1(gb);
469 if (!sps->frame_mbs_only_flag)
470 sps->mb_aff = get_bits1(gb);
474 if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
475 (unsigned)sps->mb_height >= INT_MAX / (16 * (2 - sps->frame_mbs_only_flag)) ||
476 av_image_check_size(16 * sps->mb_width,
477 16 * sps->mb_height * (2 - sps->frame_mbs_only_flag), 0, avctx)) {
478 av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
482 sps->direct_8x8_inference_flag = get_bits1(gb);
484 #ifndef ALLOW_INTERLACE
486 av_log(avctx, AV_LOG_ERROR,
487 "MBAFF support not included; enable it at compile-time.\n");
489 sps->crop = get_bits1(gb);
491 unsigned int crop_left = get_ue_golomb(gb);
492 unsigned int crop_right = get_ue_golomb(gb);
493 unsigned int crop_top = get_ue_golomb(gb);
494 unsigned int crop_bottom = get_ue_golomb(gb);
495 int width = 16 * sps->mb_width;
496 int height = 16 * sps->mb_height * (2 - sps->frame_mbs_only_flag);
498 if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
499 av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
500 "values are l:%d r:%d t:%d b:%d\n",
501 crop_left, crop_right, crop_top, crop_bottom);
506 sps->crop_bottom = 0;
508 int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
509 int hsub = (sps->chroma_format_idc == 1 ||
510 sps->chroma_format_idc == 2) ? 1 : 0;
511 int step_x = 1 << hsub;
512 int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
514 if (crop_left & (0x1F >> (sps->bit_depth_luma > 8)) &&
515 !(avctx->flags & AV_CODEC_FLAG_UNALIGNED)) {
516 crop_left &= ~(0x1F >> (sps->bit_depth_luma > 8));
517 av_log(avctx, AV_LOG_WARNING,
518 "Reducing left cropping to %d "
519 "chroma samples to preserve alignment.\n",
523 if (crop_left > (unsigned)INT_MAX / 4 / step_x ||
524 crop_right > (unsigned)INT_MAX / 4 / step_x ||
525 crop_top > (unsigned)INT_MAX / 4 / step_y ||
526 crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
527 (crop_left + crop_right ) * step_x >= width ||
528 (crop_top + crop_bottom) * step_y >= height
530 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);
534 sps->crop_left = crop_left * step_x;
535 sps->crop_right = crop_right * step_x;
536 sps->crop_top = crop_top * step_y;
537 sps->crop_bottom = crop_bottom * step_y;
547 sps->vui_parameters_present_flag = get_bits1(gb);
548 if (sps->vui_parameters_present_flag) {
549 int ret = decode_vui_parameters(gb, avctx, sps);
554 if (get_bits_left(gb) < 0) {
555 av_log(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR,
556 "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
557 if (!ignore_truncation)
561 /* if the maximum delay is not stored in the SPS, derive it based on the
563 if (!sps->bitstream_restriction_flag &&
564 (sps->ref_frame_count || avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT)) {
565 sps->num_reorder_frames = MAX_DELAYED_PIC_COUNT - 1;
566 for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
567 if (level_max_dpb_mbs[i][0] == sps->level_idc) {
568 sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
569 sps->num_reorder_frames);
578 if (avctx->debug & FF_DEBUG_PICT_INFO) {
579 static const char csp[4][5] = { "Gray", "420", "422", "444" };
580 av_log(avctx, AV_LOG_DEBUG,
581 "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",
582 sps_id, sps->profile_idc, sps->level_idc,
584 sps->ref_frame_count,
585 sps->mb_width, sps->mb_height,
586 sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
587 sps->direct_8x8_inference_flag ? "8B8" : "",
588 sps->crop_left, sps->crop_right,
589 sps->crop_top, sps->crop_bottom,
590 sps->vui_parameters_present_flag ? "VUI" : "",
591 csp[sps->chroma_format_idc],
592 sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
593 sps->timing_info_present_flag ? sps->time_scale : 0,
595 sps->bitstream_restriction_flag ? sps->num_reorder_frames : -1
599 /* check if this is a repeat of an already parsed SPS, then keep the
601 * otherwise drop all PPSes that depend on it */
602 if (ps->sps_list[sps_id] &&
603 !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
604 av_buffer_unref(&sps_buf);
606 remove_sps(ps, sps_id);
607 ps->sps_list[sps_id] = sps_buf;
613 av_buffer_unref(&sps_buf);
614 return AVERROR_INVALIDDATA;
617 static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
620 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
622 for (i = 0; i < 6; i++) {
623 pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
624 for (j = 0; j < i; j++)
625 if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
626 64 * sizeof(uint8_t))) {
627 pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
633 for (q = 0; q < max_qp + 1; q++) {
634 int shift = ff_h264_quant_div6[q];
635 int idx = ff_h264_quant_rem6[q];
636 for (x = 0; x < 64; x++)
637 pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
638 ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
639 pps->scaling_matrix8[i][x]) << shift;
644 static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
647 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
648 for (i = 0; i < 6; i++) {
649 pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
650 for (j = 0; j < i; j++)
651 if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
652 16 * sizeof(uint8_t))) {
653 pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
659 for (q = 0; q < max_qp + 1; q++) {
660 int shift = ff_h264_quant_div6[q] + 2;
661 int idx = ff_h264_quant_rem6[q];
662 for (x = 0; x < 16; x++)
663 pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
664 ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
665 pps->scaling_matrix4[i][x]) << shift;
670 static void init_dequant_tables(PPS *pps, const SPS *sps)
673 init_dequant4_coeff_table(pps, sps);
674 memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
676 if (pps->transform_8x8_mode)
677 init_dequant8_coeff_table(pps, sps);
678 if (sps->transform_bypass) {
679 for (i = 0; i < 6; i++)
680 for (x = 0; x < 16; x++)
681 pps->dequant4_coeff[i][0][x] = 1 << 6;
682 if (pps->transform_8x8_mode)
683 for (i = 0; i < 6; i++)
684 for (x = 0; x < 64; x++)
685 pps->dequant8_coeff[i][0][x] = 1 << 6;
689 static void build_qp_table(PPS *pps, int t, int index, const int depth)
692 const int max_qp = 51 + 6 * (depth - 8);
693 for (i = 0; i < max_qp + 1; i++)
694 pps->chroma_qp_table[t][i] =
695 ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
698 static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
700 int profile_idc = sps->profile_idc;
702 if ((profile_idc == 66 || profile_idc == 77 ||
703 profile_idc == 88) && (sps->constraint_set_flags & 7)) {
704 av_log(logctx, AV_LOG_VERBOSE,
705 "Current profile doesn't provide more RBSP data in PPS, skipping\n");
712 int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
713 H264ParamSets *ps, int bit_length)
715 AVBufferRef *pps_buf;
717 unsigned int pps_id = get_ue_golomb(gb);
723 if (pps_id >= MAX_PPS_COUNT) {
724 av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
725 return AVERROR_INVALIDDATA;
728 pps_buf = av_buffer_allocz(sizeof(*pps));
730 return AVERROR(ENOMEM);
731 pps = (PPS*)pps_buf->data;
733 pps->data_size = gb->buffer_end - gb->buffer;
734 if (pps->data_size > sizeof(pps->data)) {
735 av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized PPS\n");
736 pps->data_size = sizeof(pps->data);
738 memcpy(pps->data, gb->buffer, pps->data_size);
740 pps->sps_id = get_ue_golomb_31(gb);
741 if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
742 !ps->sps_list[pps->sps_id]) {
743 av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
744 ret = AVERROR_INVALIDDATA;
747 sps = (const SPS*)ps->sps_list[pps->sps_id]->data;
748 if (sps->bit_depth_luma > 14) {
749 av_log(avctx, AV_LOG_ERROR,
750 "Invalid luma bit depth=%d\n",
751 sps->bit_depth_luma);
752 ret = AVERROR_INVALIDDATA;
754 } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
755 av_log(avctx, AV_LOG_ERROR,
756 "Unimplemented luma bit depth=%d\n",
757 sps->bit_depth_luma);
758 ret = AVERROR_PATCHWELCOME;
762 pps->cabac = get_bits1(gb);
763 pps->pic_order_present = get_bits1(gb);
764 pps->slice_group_count = get_ue_golomb(gb) + 1;
765 if (pps->slice_group_count > 1) {
766 pps->mb_slice_group_map_type = get_ue_golomb(gb);
767 av_log(avctx, AV_LOG_ERROR, "FMO not supported\n");
768 switch (pps->mb_slice_group_map_type) {
771 | for (i = 0; i <= num_slice_groups_minus1; i++) | | |
772 | run_length[i] |1 |ue(v) |
777 | for (i = 0; i < num_slice_groups_minus1; i++) { | | |
778 | top_left_mb[i] |1 |ue(v) |
779 | bottom_right_mb[i] |1 |ue(v) |
787 | slice_group_change_direction_flag |1 |u(1) |
788 | slice_group_change_rate_minus1 |1 |ue(v) |
793 | slice_group_id_cnt_minus1 |1 |ue(v) |
794 | for (i = 0; i <= slice_group_id_cnt_minus1; i++)| | |
795 | slice_group_id[i] |1 |u(v) |
800 pps->ref_count[0] = get_ue_golomb(gb) + 1;
801 pps->ref_count[1] = get_ue_golomb(gb) + 1;
802 if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
803 av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
804 ret = AVERROR_INVALIDDATA;
808 qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
810 pps->weighted_pred = get_bits1(gb);
811 pps->weighted_bipred_idc = get_bits(gb, 2);
812 pps->init_qp = get_se_golomb(gb) + 26 + qp_bd_offset;
813 pps->init_qs = get_se_golomb(gb) + 26 + qp_bd_offset;
814 pps->chroma_qp_index_offset[0] = get_se_golomb(gb);
815 pps->deblocking_filter_parameters_present = get_bits1(gb);
816 pps->constrained_intra_pred = get_bits1(gb);
817 pps->redundant_pic_cnt_present = get_bits1(gb);
819 pps->transform_8x8_mode = 0;
820 memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
821 sizeof(pps->scaling_matrix4));
822 memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
823 sizeof(pps->scaling_matrix8));
825 bits_left = bit_length - get_bits_count(gb);
826 if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
827 pps->transform_8x8_mode = get_bits1(gb);
828 decode_scaling_matrices(gb, sps, pps, 0,
829 pps->scaling_matrix4, pps->scaling_matrix8);
830 // second_chroma_qp_index_offset
831 pps->chroma_qp_index_offset[1] = get_se_golomb(gb);
833 pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
836 build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
837 sps->bit_depth_luma);
838 build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
839 sps->bit_depth_luma);
841 init_dequant_tables(pps, sps);
843 if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
844 pps->chroma_qp_diff = 1;
846 if (avctx->debug & FF_DEBUG_PICT_INFO) {
847 av_log(avctx, AV_LOG_DEBUG,
848 "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
850 pps->cabac ? "CABAC" : "CAVLC",
851 pps->slice_group_count,
852 pps->ref_count[0], pps->ref_count[1],
853 pps->weighted_pred ? "weighted" : "",
854 pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
855 pps->deblocking_filter_parameters_present ? "LPAR" : "",
856 pps->constrained_intra_pred ? "CONSTR" : "",
857 pps->redundant_pic_cnt_present ? "REDU" : "",
858 pps->transform_8x8_mode ? "8x8DCT" : "");
861 remove_pps(ps, pps_id);
862 ps->pps_list[pps_id] = pps_buf;
867 av_buffer_unref(&pps_buf);