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 */
171 if (sps->color_primaries >= AVCOL_PRI_NB)
172 sps->color_primaries = AVCOL_PRI_UNSPECIFIED;
173 if (sps->color_trc >= AVCOL_TRC_NB)
174 sps->color_trc = AVCOL_TRC_UNSPECIFIED;
175 if (sps->colorspace >= AVCOL_SPC_NB)
176 sps->colorspace = AVCOL_SPC_UNSPECIFIED;
180 /* chroma_location_info_present_flag */
182 /* chroma_sample_location_type_top_field */
183 avctx->chroma_sample_location = get_ue_golomb(gb) + 1;
184 get_ue_golomb(gb); /* chroma_sample_location_type_bottom_field */
187 if (show_bits1(gb) && get_bits_left(gb) < 10) {
188 av_log(avctx, AV_LOG_WARNING, "Truncated VUI\n");
192 sps->timing_info_present_flag = get_bits1(gb);
193 if (sps->timing_info_present_flag) {
194 unsigned num_units_in_tick = get_bits_long(gb, 32);
195 unsigned time_scale = get_bits_long(gb, 32);
196 if (!num_units_in_tick || !time_scale) {
197 av_log(avctx, AV_LOG_ERROR,
198 "time_scale/num_units_in_tick invalid or unsupported (%u/%u)\n",
199 time_scale, num_units_in_tick);
200 sps->timing_info_present_flag = 0;
202 sps->num_units_in_tick = num_units_in_tick;
203 sps->time_scale = time_scale;
205 sps->fixed_frame_rate_flag = get_bits1(gb);
208 sps->nal_hrd_parameters_present_flag = get_bits1(gb);
209 if (sps->nal_hrd_parameters_present_flag)
210 if (decode_hrd_parameters(gb, avctx, sps) < 0)
211 return AVERROR_INVALIDDATA;
212 sps->vcl_hrd_parameters_present_flag = get_bits1(gb);
213 if (sps->vcl_hrd_parameters_present_flag)
214 if (decode_hrd_parameters(gb, avctx, sps) < 0)
215 return AVERROR_INVALIDDATA;
216 if (sps->nal_hrd_parameters_present_flag ||
217 sps->vcl_hrd_parameters_present_flag)
218 get_bits1(gb); /* low_delay_hrd_flag */
219 sps->pic_struct_present_flag = get_bits1(gb);
220 if (!get_bits_left(gb))
222 sps->bitstream_restriction_flag = get_bits1(gb);
223 if (sps->bitstream_restriction_flag) {
224 get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */
225 get_ue_golomb(gb); /* max_bytes_per_pic_denom */
226 get_ue_golomb(gb); /* max_bits_per_mb_denom */
227 get_ue_golomb(gb); /* log2_max_mv_length_horizontal */
228 get_ue_golomb(gb); /* log2_max_mv_length_vertical */
229 sps->num_reorder_frames = get_ue_golomb(gb);
230 get_ue_golomb(gb); /*max_dec_frame_buffering*/
232 if (get_bits_left(gb) < 0) {
233 sps->num_reorder_frames = 0;
234 sps->bitstream_restriction_flag = 0;
237 if (sps->num_reorder_frames > 16U
238 /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
239 av_log(avctx, AV_LOG_ERROR,
240 "Clipping illegal num_reorder_frames %d\n",
241 sps->num_reorder_frames);
242 sps->num_reorder_frames = 16;
243 return AVERROR_INVALIDDATA;
250 static void decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
251 const uint8_t *jvt_list,
252 const uint8_t *fallback_list)
254 int i, last = 8, next = 8;
255 const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
256 if (!get_bits1(gb)) /* matrix not written, we use the predicted one */
257 memcpy(factors, fallback_list, size * sizeof(uint8_t));
259 for (i = 0; i < size; i++) {
261 next = (last + get_se_golomb(gb)) & 0xff;
262 if (!i && !next) { /* matrix not written, we use the preset one */
263 memcpy(factors, jvt_list, size * sizeof(uint8_t));
266 last = factors[scan[i]] = next ? next : last;
270 /* returns non zero if the provided SPS scaling matrix has been filled */
271 static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps,
272 const PPS *pps, int is_sps,
273 uint8_t(*scaling_matrix4)[16],
274 uint8_t(*scaling_matrix8)[64])
276 int fallback_sps = !is_sps && sps->scaling_matrix_present;
277 const uint8_t *fallback[4] = {
278 fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
279 fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
280 fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
281 fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
286 decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
287 decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
288 decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
289 decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
290 decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
291 decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
292 if (is_sps || pps->transform_8x8_mode) {
293 decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
294 decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
295 if (sps->chroma_format_idc == 3) {
296 decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
297 decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
298 decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
299 decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
307 void ff_h264_ps_uninit(H264ParamSets *ps)
311 for (i = 0; i < MAX_SPS_COUNT; i++)
312 av_buffer_unref(&ps->sps_list[i]);
314 for (i = 0; i < MAX_PPS_COUNT; i++)
315 av_buffer_unref(&ps->pps_list[i]);
317 av_buffer_unref(&ps->sps_ref);
318 av_buffer_unref(&ps->pps_ref);
324 int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
325 H264ParamSets *ps, int ignore_truncation)
327 AVBufferRef *sps_buf;
328 int profile_idc, level_idc, constraint_set_flags = 0;
330 int i, log2_max_frame_num_minus4;
333 sps_buf = av_buffer_allocz(sizeof(*sps));
335 return AVERROR(ENOMEM);
336 sps = (SPS*)sps_buf->data;
338 sps->data_size = gb->buffer_end - gb->buffer;
339 if (sps->data_size > sizeof(sps->data)) {
340 av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized SPS\n");
341 sps->data_size = sizeof(sps->data);
343 memcpy(sps->data, gb->buffer, sps->data_size);
345 profile_idc = get_bits(gb, 8);
346 constraint_set_flags |= get_bits1(gb) << 0; // constraint_set0_flag
347 constraint_set_flags |= get_bits1(gb) << 1; // constraint_set1_flag
348 constraint_set_flags |= get_bits1(gb) << 2; // constraint_set2_flag
349 constraint_set_flags |= get_bits1(gb) << 3; // constraint_set3_flag
350 constraint_set_flags |= get_bits1(gb) << 4; // constraint_set4_flag
351 constraint_set_flags |= get_bits1(gb) << 5; // constraint_set5_flag
352 skip_bits(gb, 2); // reserved_zero_2bits
353 level_idc = get_bits(gb, 8);
354 sps_id = get_ue_golomb_31(gb);
356 if (sps_id >= MAX_SPS_COUNT) {
357 av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
361 sps->sps_id = sps_id;
362 sps->time_offset_length = 24;
363 sps->profile_idc = profile_idc;
364 sps->constraint_set_flags = constraint_set_flags;
365 sps->level_idc = level_idc;
366 sps->full_range = -1;
368 memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
369 memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
370 sps->scaling_matrix_present = 0;
371 sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
373 if (sps->profile_idc == 100 || // High profile
374 sps->profile_idc == 110 || // High10 profile
375 sps->profile_idc == 122 || // High422 profile
376 sps->profile_idc == 244 || // High444 Predictive profile
377 sps->profile_idc == 44 || // Cavlc444 profile
378 sps->profile_idc == 83 || // Scalable Constrained High profile (SVC)
379 sps->profile_idc == 86 || // Scalable High Intra profile (SVC)
380 sps->profile_idc == 118 || // Stereo High profile (MVC)
381 sps->profile_idc == 128 || // Multiview High profile (MVC)
382 sps->profile_idc == 138 || // Multiview Depth High profile (MVCD)
383 sps->profile_idc == 144) { // old High444 profile
384 sps->chroma_format_idc = get_ue_golomb_31(gb);
385 if (sps->chroma_format_idc > 3U) {
386 avpriv_request_sample(avctx, "chroma_format_idc %u",
387 sps->chroma_format_idc);
389 } else if (sps->chroma_format_idc == 3) {
390 sps->residual_color_transform_flag = get_bits1(gb);
391 if (sps->residual_color_transform_flag) {
392 av_log(avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
396 sps->bit_depth_luma = get_ue_golomb(gb) + 8;
397 sps->bit_depth_chroma = get_ue_golomb(gb) + 8;
398 if (sps->bit_depth_chroma != sps->bit_depth_luma) {
399 avpriv_request_sample(avctx,
400 "Different chroma and luma bit depth");
403 if (sps->bit_depth_luma < 8 || sps->bit_depth_luma > 14 ||
404 sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
405 av_log(avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
406 sps->bit_depth_luma, sps->bit_depth_chroma);
409 sps->transform_bypass = get_bits1(gb);
410 sps->scaling_matrix_present |= decode_scaling_matrices(gb, sps, NULL, 1,
411 sps->scaling_matrix4, sps->scaling_matrix8);
413 sps->chroma_format_idc = 1;
414 sps->bit_depth_luma = 8;
415 sps->bit_depth_chroma = 8;
418 log2_max_frame_num_minus4 = get_ue_golomb(gb);
419 if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
420 log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
421 av_log(avctx, AV_LOG_ERROR,
422 "log2_max_frame_num_minus4 out of range (0-12): %d\n",
423 log2_max_frame_num_minus4);
426 sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
428 sps->poc_type = get_ue_golomb_31(gb);
430 if (sps->poc_type == 0) { // FIXME #define
431 unsigned t = get_ue_golomb(gb);
433 av_log(avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
436 sps->log2_max_poc_lsb = t + 4;
437 } else if (sps->poc_type == 1) { // FIXME #define
438 sps->delta_pic_order_always_zero_flag = get_bits1(gb);
439 sps->offset_for_non_ref_pic = get_se_golomb(gb);
440 sps->offset_for_top_to_bottom_field = get_se_golomb(gb);
441 sps->poc_cycle_length = get_ue_golomb(gb);
443 if ((unsigned)sps->poc_cycle_length >=
444 FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
445 av_log(avctx, AV_LOG_ERROR,
446 "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
450 for (i = 0; i < sps->poc_cycle_length; i++)
451 sps->offset_for_ref_frame[i] = get_se_golomb(gb);
452 } else if (sps->poc_type != 2) {
453 av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
457 sps->ref_frame_count = get_ue_golomb_31(gb);
458 if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
459 sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
460 if (sps->ref_frame_count > MAX_DELAYED_PIC_COUNT) {
461 av_log(avctx, AV_LOG_ERROR,
462 "too many reference frames %d\n", sps->ref_frame_count);
465 sps->gaps_in_frame_num_allowed_flag = get_bits1(gb);
466 sps->mb_width = get_ue_golomb(gb) + 1;
467 sps->mb_height = get_ue_golomb(gb) + 1;
469 sps->frame_mbs_only_flag = get_bits1(gb);
470 if (!sps->frame_mbs_only_flag)
471 sps->mb_aff = get_bits1(gb);
475 if ((unsigned)sps->mb_width >= INT_MAX / 16 ||
476 (unsigned)sps->mb_height >= INT_MAX / (16 * (2 - sps->frame_mbs_only_flag)) ||
477 av_image_check_size(16 * sps->mb_width,
478 16 * sps->mb_height * (2 - sps->frame_mbs_only_flag), 0, avctx)) {
479 av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
483 sps->direct_8x8_inference_flag = get_bits1(gb);
485 #ifndef ALLOW_INTERLACE
487 av_log(avctx, AV_LOG_ERROR,
488 "MBAFF support not included; enable it at compile-time.\n");
490 sps->crop = get_bits1(gb);
492 unsigned int crop_left = get_ue_golomb(gb);
493 unsigned int crop_right = get_ue_golomb(gb);
494 unsigned int crop_top = get_ue_golomb(gb);
495 unsigned int crop_bottom = get_ue_golomb(gb);
496 int width = 16 * sps->mb_width;
497 int height = 16 * sps->mb_height * (2 - sps->frame_mbs_only_flag);
499 if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
500 av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
501 "values are l:%d r:%d t:%d b:%d\n",
502 crop_left, crop_right, crop_top, crop_bottom);
507 sps->crop_bottom = 0;
509 int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
510 int hsub = (sps->chroma_format_idc == 1 ||
511 sps->chroma_format_idc == 2) ? 1 : 0;
512 int step_x = 1 << hsub;
513 int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
515 if (crop_left & (0x1F >> (sps->bit_depth_luma > 8)) &&
516 !(avctx->flags & AV_CODEC_FLAG_UNALIGNED)) {
517 crop_left &= ~(0x1F >> (sps->bit_depth_luma > 8));
518 av_log(avctx, AV_LOG_WARNING,
519 "Reducing left cropping to %d "
520 "chroma samples to preserve alignment.\n",
524 if (crop_left > (unsigned)INT_MAX / 4 / step_x ||
525 crop_right > (unsigned)INT_MAX / 4 / step_x ||
526 crop_top > (unsigned)INT_MAX / 4 / step_y ||
527 crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
528 (crop_left + crop_right ) * step_x >= width ||
529 (crop_top + crop_bottom) * step_y >= height
531 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);
535 sps->crop_left = crop_left * step_x;
536 sps->crop_right = crop_right * step_x;
537 sps->crop_top = crop_top * step_y;
538 sps->crop_bottom = crop_bottom * step_y;
548 sps->vui_parameters_present_flag = get_bits1(gb);
549 if (sps->vui_parameters_present_flag) {
550 int ret = decode_vui_parameters(gb, avctx, sps);
555 if (get_bits_left(gb) < 0) {
556 av_log(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR,
557 "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
558 if (!ignore_truncation)
562 /* if the maximum delay is not stored in the SPS, derive it based on the
564 if (!sps->bitstream_restriction_flag &&
565 (sps->ref_frame_count || avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT)) {
566 sps->num_reorder_frames = MAX_DELAYED_PIC_COUNT - 1;
567 for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
568 if (level_max_dpb_mbs[i][0] == sps->level_idc) {
569 sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
570 sps->num_reorder_frames);
579 if (avctx->debug & FF_DEBUG_PICT_INFO) {
580 static const char csp[4][5] = { "Gray", "420", "422", "444" };
581 av_log(avctx, AV_LOG_DEBUG,
582 "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",
583 sps_id, sps->profile_idc, sps->level_idc,
585 sps->ref_frame_count,
586 sps->mb_width, sps->mb_height,
587 sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
588 sps->direct_8x8_inference_flag ? "8B8" : "",
589 sps->crop_left, sps->crop_right,
590 sps->crop_top, sps->crop_bottom,
591 sps->vui_parameters_present_flag ? "VUI" : "",
592 csp[sps->chroma_format_idc],
593 sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
594 sps->timing_info_present_flag ? sps->time_scale : 0,
596 sps->bitstream_restriction_flag ? sps->num_reorder_frames : -1
600 /* check if this is a repeat of an already parsed SPS, then keep the
602 * otherwise drop all PPSes that depend on it */
603 if (ps->sps_list[sps_id] &&
604 !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
605 av_buffer_unref(&sps_buf);
607 remove_sps(ps, sps_id);
608 ps->sps_list[sps_id] = sps_buf;
614 av_buffer_unref(&sps_buf);
615 return AVERROR_INVALIDDATA;
618 static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
621 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
623 for (i = 0; i < 6; i++) {
624 pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
625 for (j = 0; j < i; j++)
626 if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
627 64 * sizeof(uint8_t))) {
628 pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
634 for (q = 0; q < max_qp + 1; q++) {
635 int shift = ff_h264_quant_div6[q];
636 int idx = ff_h264_quant_rem6[q];
637 for (x = 0; x < 64; x++)
638 pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
639 ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
640 pps->scaling_matrix8[i][x]) << shift;
645 static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
648 const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
649 for (i = 0; i < 6; i++) {
650 pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
651 for (j = 0; j < i; j++)
652 if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
653 16 * sizeof(uint8_t))) {
654 pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
660 for (q = 0; q < max_qp + 1; q++) {
661 int shift = ff_h264_quant_div6[q] + 2;
662 int idx = ff_h264_quant_rem6[q];
663 for (x = 0; x < 16; x++)
664 pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
665 ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
666 pps->scaling_matrix4[i][x]) << shift;
671 static void init_dequant_tables(PPS *pps, const SPS *sps)
674 init_dequant4_coeff_table(pps, sps);
675 memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
677 if (pps->transform_8x8_mode)
678 init_dequant8_coeff_table(pps, sps);
679 if (sps->transform_bypass) {
680 for (i = 0; i < 6; i++)
681 for (x = 0; x < 16; x++)
682 pps->dequant4_coeff[i][0][x] = 1 << 6;
683 if (pps->transform_8x8_mode)
684 for (i = 0; i < 6; i++)
685 for (x = 0; x < 64; x++)
686 pps->dequant8_coeff[i][0][x] = 1 << 6;
690 static void build_qp_table(PPS *pps, int t, int index, const int depth)
693 const int max_qp = 51 + 6 * (depth - 8);
694 for (i = 0; i < max_qp + 1; i++)
695 pps->chroma_qp_table[t][i] =
696 ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
699 static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
701 int profile_idc = sps->profile_idc;
703 if ((profile_idc == 66 || profile_idc == 77 ||
704 profile_idc == 88) && (sps->constraint_set_flags & 7)) {
705 av_log(logctx, AV_LOG_VERBOSE,
706 "Current profile doesn't provide more RBSP data in PPS, skipping\n");
713 int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
714 H264ParamSets *ps, int bit_length)
716 AVBufferRef *pps_buf;
718 unsigned int pps_id = get_ue_golomb(gb);
724 if (pps_id >= MAX_PPS_COUNT) {
725 av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
726 return AVERROR_INVALIDDATA;
729 pps_buf = av_buffer_allocz(sizeof(*pps));
731 return AVERROR(ENOMEM);
732 pps = (PPS*)pps_buf->data;
734 pps->data_size = gb->buffer_end - gb->buffer;
735 if (pps->data_size > sizeof(pps->data)) {
736 av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized PPS "
737 "(%"SIZE_SPECIFIER" > %"SIZE_SPECIFIER")\n",
738 pps->data_size, sizeof(pps->data));
739 pps->data_size = sizeof(pps->data);
741 memcpy(pps->data, gb->buffer, pps->data_size);
743 pps->sps_id = get_ue_golomb_31(gb);
744 if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
745 !ps->sps_list[pps->sps_id]) {
746 av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
747 ret = AVERROR_INVALIDDATA;
750 sps = (const SPS*)ps->sps_list[pps->sps_id]->data;
751 if (sps->bit_depth_luma > 14) {
752 av_log(avctx, AV_LOG_ERROR,
753 "Invalid luma bit depth=%d\n",
754 sps->bit_depth_luma);
755 ret = AVERROR_INVALIDDATA;
757 } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
758 av_log(avctx, AV_LOG_ERROR,
759 "Unimplemented luma bit depth=%d\n",
760 sps->bit_depth_luma);
761 ret = AVERROR_PATCHWELCOME;
765 pps->cabac = get_bits1(gb);
766 pps->pic_order_present = get_bits1(gb);
767 pps->slice_group_count = get_ue_golomb(gb) + 1;
768 if (pps->slice_group_count > 1) {
769 pps->mb_slice_group_map_type = get_ue_golomb(gb);
770 av_log(avctx, AV_LOG_ERROR, "FMO not supported\n");
771 switch (pps->mb_slice_group_map_type) {
774 | for (i = 0; i <= num_slice_groups_minus1; i++) | | |
775 | run_length[i] |1 |ue(v) |
780 | for (i = 0; i < num_slice_groups_minus1; i++) { | | |
781 | top_left_mb[i] |1 |ue(v) |
782 | bottom_right_mb[i] |1 |ue(v) |
790 | slice_group_change_direction_flag |1 |u(1) |
791 | slice_group_change_rate_minus1 |1 |ue(v) |
796 | slice_group_id_cnt_minus1 |1 |ue(v) |
797 | for (i = 0; i <= slice_group_id_cnt_minus1; i++)| | |
798 | slice_group_id[i] |1 |u(v) |
803 pps->ref_count[0] = get_ue_golomb(gb) + 1;
804 pps->ref_count[1] = get_ue_golomb(gb) + 1;
805 if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
806 av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
807 ret = AVERROR_INVALIDDATA;
811 qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
813 pps->weighted_pred = get_bits1(gb);
814 pps->weighted_bipred_idc = get_bits(gb, 2);
815 pps->init_qp = get_se_golomb(gb) + 26 + qp_bd_offset;
816 pps->init_qs = get_se_golomb(gb) + 26 + qp_bd_offset;
817 pps->chroma_qp_index_offset[0] = get_se_golomb(gb);
818 pps->deblocking_filter_parameters_present = get_bits1(gb);
819 pps->constrained_intra_pred = get_bits1(gb);
820 pps->redundant_pic_cnt_present = get_bits1(gb);
822 pps->transform_8x8_mode = 0;
823 memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
824 sizeof(pps->scaling_matrix4));
825 memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
826 sizeof(pps->scaling_matrix8));
828 bits_left = bit_length - get_bits_count(gb);
829 if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
830 pps->transform_8x8_mode = get_bits1(gb);
831 decode_scaling_matrices(gb, sps, pps, 0,
832 pps->scaling_matrix4, pps->scaling_matrix8);
833 // second_chroma_qp_index_offset
834 pps->chroma_qp_index_offset[1] = get_se_golomb(gb);
836 pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
839 build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
840 sps->bit_depth_luma);
841 build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
842 sps->bit_depth_luma);
844 init_dequant_tables(pps, sps);
846 if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
847 pps->chroma_qp_diff = 1;
849 if (avctx->debug & FF_DEBUG_PICT_INFO) {
850 av_log(avctx, AV_LOG_DEBUG,
851 "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
853 pps->cabac ? "CABAC" : "CAVLC",
854 pps->slice_group_count,
855 pps->ref_count[0], pps->ref_count[1],
856 pps->weighted_pred ? "weighted" : "",
857 pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
858 pps->deblocking_filter_parameters_present ? "LPAR" : "",
859 pps->constrained_intra_pred ? "CONSTR" : "",
860 pps->redundant_pic_cnt_present ? "REDU" : "",
861 pps->transform_8x8_mode ? "8x8DCT" : "");
864 remove_pps(ps, pps_id);
865 ps->pps_list[pps_id] = pps_buf;
870 av_buffer_unref(&pps_buf);