yading@10: /*
yading@10:  * H.26L/H.264/AVC/JVT/14496-10/... parameter set decoding
yading@10:  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * H.264 / AVC / MPEG4 part10 parameter set decoding.
yading@10:  * @author Michael Niedermayer <michaelni@gmx.at>
yading@10:  */
yading@10: 
yading@10: #include "libavutil/imgutils.h"
yading@10: #include "internal.h"
yading@10: #include "avcodec.h"
yading@10: #include "h264.h"
yading@10: #include "h264data.h" //FIXME FIXME FIXME (just for zigzag_scan)
yading@10: #include "golomb.h"
yading@10: 
yading@10: 
yading@10: //#undef NDEBUG
yading@10: #include <assert.h>
yading@10: 
yading@10: #define MAX_LOG2_MAX_FRAME_NUM    (12 + 4)
yading@10: #define MIN_LOG2_MAX_FRAME_NUM    4
yading@10: 
yading@10: static const AVRational pixel_aspect[17]={
yading@10:  {0, 1},
yading@10:  {1, 1},
yading@10:  {12, 11},
yading@10:  {10, 11},
yading@10:  {16, 11},
yading@10:  {40, 33},
yading@10:  {24, 11},
yading@10:  {20, 11},
yading@10:  {32, 11},
yading@10:  {80, 33},
yading@10:  {18, 11},
yading@10:  {15, 11},
yading@10:  {64, 33},
yading@10:  {160,99},
yading@10:  {4, 3},
yading@10:  {3, 2},
yading@10:  {2, 1},
yading@10: };
yading@10: 
yading@10: #define QP(qP,depth) ( (qP)+6*((depth)-8) )
yading@10: 
yading@10: #define CHROMA_QP_TABLE_END(d) \
yading@10:      QP(0,d),  QP(1,d),  QP(2,d),  QP(3,d),  QP(4,d),  QP(5,d),\
yading@10:      QP(6,d),  QP(7,d),  QP(8,d),  QP(9,d), QP(10,d), QP(11,d),\
yading@10:     QP(12,d), QP(13,d), QP(14,d), QP(15,d), QP(16,d), QP(17,d),\
yading@10:     QP(18,d), QP(19,d), QP(20,d), QP(21,d), QP(22,d), QP(23,d),\
yading@10:     QP(24,d), QP(25,d), QP(26,d), QP(27,d), QP(28,d), QP(29,d),\
yading@10:     QP(29,d), QP(30,d), QP(31,d), QP(32,d), QP(32,d), QP(33,d),\
yading@10:     QP(34,d), QP(34,d), QP(35,d), QP(35,d), QP(36,d), QP(36,d),\
yading@10:     QP(37,d), QP(37,d), QP(37,d), QP(38,d), QP(38,d), QP(38,d),\
yading@10:     QP(39,d), QP(39,d), QP(39,d), QP(39,d)
yading@10: 
yading@10: const uint8_t ff_h264_chroma_qp[7][QP_MAX_NUM+1] = {
yading@10:     {
yading@10:         CHROMA_QP_TABLE_END(8)
yading@10:     },
yading@10:     {
yading@10:         0, 1, 2, 3, 4, 5,
yading@10:         CHROMA_QP_TABLE_END(9)
yading@10:     },
yading@10:     {
yading@10:         0, 1, 2, 3,  4,  5,
yading@10:         6, 7, 8, 9, 10, 11,
yading@10:         CHROMA_QP_TABLE_END(10)
yading@10:     },
yading@10:     {
yading@10:         0,  1, 2, 3,  4,  5,
yading@10:         6,  7, 8, 9, 10, 11,
yading@10:         12,13,14,15, 16, 17,
yading@10:         CHROMA_QP_TABLE_END(11)
yading@10:     },
yading@10:     {
yading@10:         0,  1, 2, 3,  4,  5,
yading@10:         6,  7, 8, 9, 10, 11,
yading@10:         12,13,14,15, 16, 17,
yading@10:         18,19,20,21, 22, 23,
yading@10:         CHROMA_QP_TABLE_END(12)
yading@10:     },
yading@10:     {
yading@10:         0,  1, 2, 3,  4,  5,
yading@10:         6,  7, 8, 9, 10, 11,
yading@10:         12,13,14,15, 16, 17,
yading@10:         18,19,20,21, 22, 23,
yading@10:         24,25,26,27, 28, 29,
yading@10:         CHROMA_QP_TABLE_END(13)
yading@10:     },
yading@10:     {
yading@10:         0,  1, 2, 3,  4,  5,
yading@10:         6,  7, 8, 9, 10, 11,
yading@10:         12,13,14,15, 16, 17,
yading@10:         18,19,20,21, 22, 23,
yading@10:         24,25,26,27, 28, 29,
yading@10:         30,31,32,33, 34, 35,
yading@10:         CHROMA_QP_TABLE_END(14)
yading@10:     },
yading@10: };
yading@10: 
yading@10: static const uint8_t default_scaling4[2][16]={
yading@10: {   6,13,20,28,
yading@10:    13,20,28,32,
yading@10:    20,28,32,37,
yading@10:    28,32,37,42
yading@10: },{
yading@10:    10,14,20,24,
yading@10:    14,20,24,27,
yading@10:    20,24,27,30,
yading@10:    24,27,30,34
yading@10: }};
yading@10: 
yading@10: static const uint8_t default_scaling8[2][64]={
yading@10: {   6,10,13,16,18,23,25,27,
yading@10:    10,11,16,18,23,25,27,29,
yading@10:    13,16,18,23,25,27,29,31,
yading@10:    16,18,23,25,27,29,31,33,
yading@10:    18,23,25,27,29,31,33,36,
yading@10:    23,25,27,29,31,33,36,38,
yading@10:    25,27,29,31,33,36,38,40,
yading@10:    27,29,31,33,36,38,40,42
yading@10: },{
yading@10:     9,13,15,17,19,21,22,24,
yading@10:    13,13,17,19,21,22,24,25,
yading@10:    15,17,19,21,22,24,25,27,
yading@10:    17,19,21,22,24,25,27,28,
yading@10:    19,21,22,24,25,27,28,30,
yading@10:    21,22,24,25,27,28,30,32,
yading@10:    22,24,25,27,28,30,32,33,
yading@10:    24,25,27,28,30,32,33,35
yading@10: }};
yading@10: 
yading@10: static inline int decode_hrd_parameters(H264Context *h, SPS *sps){
yading@10:     int cpb_count, i;
yading@10:     cpb_count = get_ue_golomb_31(&h->gb) + 1;
yading@10: 
yading@10:     if(cpb_count > 32U){
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
yading@10:         return -1;
yading@10:     }
yading@10: 
yading@10:     get_bits(&h->gb, 4); /* bit_rate_scale */
yading@10:     get_bits(&h->gb, 4); /* cpb_size_scale */
yading@10:     for(i=0; i<cpb_count; i++){
yading@10:         get_ue_golomb_long(&h->gb); /* bit_rate_value_minus1 */
yading@10:         get_ue_golomb_long(&h->gb); /* cpb_size_value_minus1 */
yading@10:         get_bits1(&h->gb);     /* cbr_flag */
yading@10:     }
yading@10:     sps->initial_cpb_removal_delay_length = get_bits(&h->gb, 5) + 1;
yading@10:     sps->cpb_removal_delay_length = get_bits(&h->gb, 5) + 1;
yading@10:     sps->dpb_output_delay_length = get_bits(&h->gb, 5) + 1;
yading@10:     sps->time_offset_length = get_bits(&h->gb, 5);
yading@10:     sps->cpb_cnt = cpb_count;
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static inline int decode_vui_parameters(H264Context *h, SPS *sps){
yading@10:     int aspect_ratio_info_present_flag;
yading@10:     unsigned int aspect_ratio_idc;
yading@10: 
yading@10:     aspect_ratio_info_present_flag= get_bits1(&h->gb);
yading@10: 
yading@10:     if( aspect_ratio_info_present_flag ) {
yading@10:         aspect_ratio_idc= get_bits(&h->gb, 8);
yading@10:         if( aspect_ratio_idc == EXTENDED_SAR ) {
yading@10:             sps->sar.num= get_bits(&h->gb, 16);
yading@10:             sps->sar.den= get_bits(&h->gb, 16);
yading@10:         }else if(aspect_ratio_idc < FF_ARRAY_ELEMS(pixel_aspect)){
yading@10:             sps->sar=  pixel_aspect[aspect_ratio_idc];
yading@10:         }else{
yading@10:             av_log(h->avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
yading@10:             return -1;
yading@10:         }
yading@10:     }else{
yading@10:         sps->sar.num=
yading@10:         sps->sar.den= 0;
yading@10:     }
yading@10: //            s->avctx->aspect_ratio= sar_width*s->width / (float)(s->height*sar_height);
yading@10: 
yading@10:     if(get_bits1(&h->gb)){      /* overscan_info_present_flag */
yading@10:         get_bits1(&h->gb);      /* overscan_appropriate_flag */
yading@10:     }
yading@10: 
yading@10:     sps->video_signal_type_present_flag = get_bits1(&h->gb);
yading@10:     if(sps->video_signal_type_present_flag){
yading@10:         get_bits(&h->gb, 3);    /* video_format */
yading@10:         sps->full_range = get_bits1(&h->gb); /* video_full_range_flag */
yading@10: 
yading@10:         sps->colour_description_present_flag = get_bits1(&h->gb);
yading@10:         if(sps->colour_description_present_flag){
yading@10:             sps->color_primaries = get_bits(&h->gb, 8); /* colour_primaries */
yading@10:             sps->color_trc       = get_bits(&h->gb, 8); /* transfer_characteristics */
yading@10:             sps->colorspace      = get_bits(&h->gb, 8); /* matrix_coefficients */
yading@10:             if (sps->color_primaries >= AVCOL_PRI_NB)
yading@10:                 sps->color_primaries  = AVCOL_PRI_UNSPECIFIED;
yading@10:             if (sps->color_trc >= AVCOL_TRC_NB)
yading@10:                 sps->color_trc  = AVCOL_TRC_UNSPECIFIED;
yading@10:             if (sps->colorspace >= AVCOL_SPC_NB)
yading@10:                 sps->colorspace  = AVCOL_SPC_UNSPECIFIED;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     if(get_bits1(&h->gb)){      /* chroma_location_info_present_flag */
yading@10:         h->avctx->chroma_sample_location = get_ue_golomb(&h->gb)+1;  /* chroma_sample_location_type_top_field */
yading@10:         get_ue_golomb(&h->gb);  /* chroma_sample_location_type_bottom_field */
yading@10:     }
yading@10: 
yading@10:     sps->timing_info_present_flag = get_bits1(&h->gb);
yading@10:     if(sps->timing_info_present_flag){
yading@10:         sps->num_units_in_tick = get_bits_long(&h->gb, 32);
yading@10:         sps->time_scale = get_bits_long(&h->gb, 32);
yading@10:         if(!sps->num_units_in_tick || !sps->time_scale){
yading@10:             av_log(h->avctx, AV_LOG_ERROR, "time_scale/num_units_in_tick invalid or unsupported (%d/%d)\n", sps->time_scale, sps->num_units_in_tick);
yading@10:             return -1;
yading@10:         }
yading@10:         sps->fixed_frame_rate_flag = get_bits1(&h->gb);
yading@10:     }
yading@10: 
yading@10:     sps->nal_hrd_parameters_present_flag = get_bits1(&h->gb);
yading@10:     if(sps->nal_hrd_parameters_present_flag)
yading@10:         if(decode_hrd_parameters(h, sps) < 0)
yading@10:             return -1;
yading@10:     sps->vcl_hrd_parameters_present_flag = get_bits1(&h->gb);
yading@10:     if(sps->vcl_hrd_parameters_present_flag)
yading@10:         if(decode_hrd_parameters(h, sps) < 0)
yading@10:             return -1;
yading@10:     if(sps->nal_hrd_parameters_present_flag || sps->vcl_hrd_parameters_present_flag)
yading@10:         get_bits1(&h->gb);     /* low_delay_hrd_flag */
yading@10:     sps->pic_struct_present_flag = get_bits1(&h->gb);
yading@10:     if(!get_bits_left(&h->gb))
yading@10:         return 0;
yading@10:     sps->bitstream_restriction_flag = get_bits1(&h->gb);
yading@10:     if(sps->bitstream_restriction_flag){
yading@10:         get_bits1(&h->gb);     /* motion_vectors_over_pic_boundaries_flag */
yading@10:         get_ue_golomb(&h->gb); /* max_bytes_per_pic_denom */
yading@10:         get_ue_golomb(&h->gb); /* max_bits_per_mb_denom */
yading@10:         get_ue_golomb(&h->gb); /* log2_max_mv_length_horizontal */
yading@10:         get_ue_golomb(&h->gb); /* log2_max_mv_length_vertical */
yading@10:         sps->num_reorder_frames= get_ue_golomb(&h->gb);
yading@10:         get_ue_golomb(&h->gb); /*max_dec_frame_buffering*/
yading@10: 
yading@10:         if (get_bits_left(&h->gb) < 0) {
yading@10:             sps->num_reorder_frames=0;
yading@10:             sps->bitstream_restriction_flag= 0;
yading@10:         }
yading@10: 
yading@10:         if(sps->num_reorder_frames > 16U /*max_dec_frame_buffering || max_dec_frame_buffering > 16*/){
yading@10:             av_log(h->avctx, AV_LOG_ERROR, "illegal num_reorder_frames %d\n", sps->num_reorder_frames);
yading@10:             return -1;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     if (get_bits_left(&h->gb) < 0) {
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "Overread VUI by %d bits\n", -get_bits_left(&h->gb));
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     }
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static void decode_scaling_list(H264Context *h, uint8_t *factors, int size,
yading@10:                                 const uint8_t *jvt_list, const uint8_t *fallback_list){
yading@10:     int i, last = 8, next = 8;
yading@10:     const uint8_t *scan = size == 16 ? zigzag_scan : ff_zigzag_direct;
yading@10:     if(!get_bits1(&h->gb)) /* matrix not written, we use the predicted one */
yading@10:         memcpy(factors, fallback_list, size*sizeof(uint8_t));
yading@10:     else
yading@10:     for(i=0;i<size;i++){
yading@10:         if(next)
yading@10:             next = (last + get_se_golomb(&h->gb)) & 0xff;
yading@10:         if(!i && !next){ /* matrix not written, we use the preset one */
yading@10:             memcpy(factors, jvt_list, size*sizeof(uint8_t));
yading@10:             break;
yading@10:         }
yading@10:         last = factors[scan[i]] = next ? next : last;
yading@10:     }
yading@10: }
yading@10: 
yading@10: static void decode_scaling_matrices(H264Context *h, SPS *sps, PPS *pps, int is_sps,
yading@10:                                    uint8_t (*scaling_matrix4)[16], uint8_t (*scaling_matrix8)[64]){
yading@10:     int fallback_sps = !is_sps && sps->scaling_matrix_present;
yading@10:     const uint8_t *fallback[4] = {
yading@10:         fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
yading@10:         fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
yading@10:         fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
yading@10:         fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
yading@10:     };
yading@10:     if(get_bits1(&h->gb)){
yading@10:         sps->scaling_matrix_present |= is_sps;
yading@10:         decode_scaling_list(h,scaling_matrix4[0],16,default_scaling4[0],fallback[0]); // Intra, Y
yading@10:         decode_scaling_list(h,scaling_matrix4[1],16,default_scaling4[0],scaling_matrix4[0]); // Intra, Cr
yading@10:         decode_scaling_list(h,scaling_matrix4[2],16,default_scaling4[0],scaling_matrix4[1]); // Intra, Cb
yading@10:         decode_scaling_list(h,scaling_matrix4[3],16,default_scaling4[1],fallback[1]); // Inter, Y
yading@10:         decode_scaling_list(h,scaling_matrix4[4],16,default_scaling4[1],scaling_matrix4[3]); // Inter, Cr
yading@10:         decode_scaling_list(h,scaling_matrix4[5],16,default_scaling4[1],scaling_matrix4[4]); // Inter, Cb
yading@10:         if(is_sps || pps->transform_8x8_mode){
yading@10:             decode_scaling_list(h,scaling_matrix8[0],64,default_scaling8[0],fallback[2]);  // Intra, Y
yading@10:             decode_scaling_list(h,scaling_matrix8[3],64,default_scaling8[1],fallback[3]);  // Inter, Y
yading@10:             if(sps->chroma_format_idc == 3){
yading@10:                 decode_scaling_list(h,scaling_matrix8[1],64,default_scaling8[0],scaling_matrix8[0]);  // Intra, Cr
yading@10:                 decode_scaling_list(h,scaling_matrix8[4],64,default_scaling8[1],scaling_matrix8[3]);  // Inter, Cr
yading@10:                 decode_scaling_list(h,scaling_matrix8[2],64,default_scaling8[0],scaling_matrix8[1]);  // Intra, Cb
yading@10:                 decode_scaling_list(h,scaling_matrix8[5],64,default_scaling8[1],scaling_matrix8[4]);  // Inter, Cb
yading@10:             }
yading@10:         }
yading@10:     }
yading@10: }
yading@10: 
yading@10: int ff_h264_decode_seq_parameter_set(H264Context *h){
yading@10:     int profile_idc, level_idc, constraint_set_flags = 0;
yading@10:     unsigned int sps_id;
yading@10:     int i, log2_max_frame_num_minus4;
yading@10:     SPS *sps;
yading@10: 
yading@10:     profile_idc= get_bits(&h->gb, 8);
yading@10:     constraint_set_flags |= get_bits1(&h->gb) << 0;   //constraint_set0_flag
yading@10:     constraint_set_flags |= get_bits1(&h->gb) << 1;   //constraint_set1_flag
yading@10:     constraint_set_flags |= get_bits1(&h->gb) << 2;   //constraint_set2_flag
yading@10:     constraint_set_flags |= get_bits1(&h->gb) << 3;   //constraint_set3_flag
yading@10:     constraint_set_flags |= get_bits1(&h->gb) << 4;   //constraint_set4_flag
yading@10:     constraint_set_flags |= get_bits1(&h->gb) << 5;   //constraint_set5_flag
yading@10:     get_bits(&h->gb, 2); // reserved
yading@10:     level_idc= get_bits(&h->gb, 8);
yading@10:     sps_id= get_ue_golomb_31(&h->gb);
yading@10: 
yading@10:     if(sps_id >= MAX_SPS_COUNT) {
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "sps_id (%d) out of range\n", sps_id);
yading@10:         return -1;
yading@10:     }
yading@10:     sps= av_mallocz(sizeof(SPS));
yading@10:     if(sps == NULL)
yading@10:         return -1;
yading@10: 
yading@10:     sps->time_offset_length = 24;
yading@10:     sps->profile_idc= profile_idc;
yading@10:     sps->constraint_set_flags = constraint_set_flags;
yading@10:     sps->level_idc= level_idc;
yading@10:     sps->full_range = -1;
yading@10: 
yading@10:     memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
yading@10:     memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
yading@10:     sps->scaling_matrix_present = 0;
yading@10:     sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
yading@10: 
yading@10:     if (sps->profile_idc == 100 || sps->profile_idc == 110 ||
yading@10:         sps->profile_idc == 122 || sps->profile_idc == 244 ||
yading@10:         sps->profile_idc ==  44 || sps->profile_idc ==  83 ||
yading@10:         sps->profile_idc ==  86 || sps->profile_idc == 118 ||
yading@10:         sps->profile_idc == 128 || sps->profile_idc == 144) {
yading@10:         sps->chroma_format_idc= get_ue_golomb_31(&h->gb);
yading@10:         if (sps->chroma_format_idc > 3U) {
yading@10:             av_log(h->avctx, AV_LOG_ERROR, "chroma_format_idc %d is illegal\n", sps->chroma_format_idc);
yading@10:             goto fail;
yading@10:         } else if(sps->chroma_format_idc == 3) {
yading@10:             sps->residual_color_transform_flag = get_bits1(&h->gb);
yading@10:             if(sps->residual_color_transform_flag) {
yading@10:                 av_log(h->avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
yading@10:                 goto fail;
yading@10:             }
yading@10:         }
yading@10:         sps->bit_depth_luma   = get_ue_golomb(&h->gb) + 8;
yading@10:         sps->bit_depth_chroma = get_ue_golomb(&h->gb) + 8;
yading@10:         if (sps->bit_depth_luma > 14U || sps->bit_depth_chroma > 14U || sps->bit_depth_luma != sps->bit_depth_chroma) {
yading@10:             av_log(h->avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
yading@10:                    sps->bit_depth_luma, sps->bit_depth_chroma);
yading@10:             goto fail;
yading@10:         }
yading@10:         sps->transform_bypass = get_bits1(&h->gb);
yading@10:         decode_scaling_matrices(h, sps, NULL, 1, sps->scaling_matrix4, sps->scaling_matrix8);
yading@10:     }else{
yading@10:         sps->chroma_format_idc= 1;
yading@10:         sps->bit_depth_luma   = 8;
yading@10:         sps->bit_depth_chroma = 8;
yading@10:     }
yading@10: 
yading@10:     log2_max_frame_num_minus4 = get_ue_golomb(&h->gb);
yading@10:     if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
yading@10:         log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
yading@10:         av_log(h->avctx, AV_LOG_ERROR,
yading@10:                "log2_max_frame_num_minus4 out of range (0-12): %d\n",
yading@10:                log2_max_frame_num_minus4);
yading@10:         goto fail;
yading@10:     }
yading@10:     sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
yading@10: 
yading@10:     sps->poc_type= get_ue_golomb_31(&h->gb);
yading@10: 
yading@10:     if(sps->poc_type == 0){ //FIXME #define
yading@10:         unsigned t = get_ue_golomb(&h->gb);
yading@10:         if(t>12){
yading@10:             av_log(h->avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
yading@10:             goto fail;
yading@10:         }
yading@10:         sps->log2_max_poc_lsb= t + 4;
yading@10:     } else if(sps->poc_type == 1){//FIXME #define
yading@10:         sps->delta_pic_order_always_zero_flag= get_bits1(&h->gb);
yading@10:         sps->offset_for_non_ref_pic= get_se_golomb(&h->gb);
yading@10:         sps->offset_for_top_to_bottom_field= get_se_golomb(&h->gb);
yading@10:         sps->poc_cycle_length                = get_ue_golomb(&h->gb);
yading@10: 
yading@10:         if((unsigned)sps->poc_cycle_length >= FF_ARRAY_ELEMS(sps->offset_for_ref_frame)){
yading@10:             av_log(h->avctx, AV_LOG_ERROR, "poc_cycle_length overflow %u\n", sps->poc_cycle_length);
yading@10:             goto fail;
yading@10:         }
yading@10: 
yading@10:         for(i=0; i<sps->poc_cycle_length; i++)
yading@10:             sps->offset_for_ref_frame[i]= get_se_golomb(&h->gb);
yading@10:     }else if(sps->poc_type != 2){
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
yading@10:         goto fail;
yading@10:     }
yading@10: 
yading@10:     sps->ref_frame_count= get_ue_golomb_31(&h->gb);
yading@10:     if (h->avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
yading@10:         sps->ref_frame_count= FFMAX(2, sps->ref_frame_count);
yading@10:     if(sps->ref_frame_count > MAX_PICTURE_COUNT-2 || sps->ref_frame_count > 16U){
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "too many reference frames\n");
yading@10:         goto fail;
yading@10:     }
yading@10:     sps->gaps_in_frame_num_allowed_flag= get_bits1(&h->gb);
yading@10:     sps->mb_width = get_ue_golomb(&h->gb) + 1;
yading@10:     sps->mb_height= get_ue_golomb(&h->gb) + 1;
yading@10:     if((unsigned)sps->mb_width >= INT_MAX/16 || (unsigned)sps->mb_height >= INT_MAX/16 ||
yading@10:        av_image_check_size(16*sps->mb_width, 16*sps->mb_height, 0, h->avctx)){
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
yading@10:         goto fail;
yading@10:     }
yading@10: 
yading@10:     sps->frame_mbs_only_flag= get_bits1(&h->gb);
yading@10:     if(!sps->frame_mbs_only_flag)
yading@10:         sps->mb_aff= get_bits1(&h->gb);
yading@10:     else
yading@10:         sps->mb_aff= 0;
yading@10: 
yading@10:     sps->direct_8x8_inference_flag= get_bits1(&h->gb);
yading@10: 
yading@10: #ifndef ALLOW_INTERLACE
yading@10:     if(sps->mb_aff)
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "MBAFF support not included; enable it at compile-time.\n");
yading@10: #endif
yading@10:     sps->crop= get_bits1(&h->gb);
yading@10:     if(sps->crop){
yading@10:         int crop_left   = get_ue_golomb(&h->gb);
yading@10:         int crop_right  = get_ue_golomb(&h->gb);
yading@10:         int crop_top    = get_ue_golomb(&h->gb);
yading@10:         int crop_bottom = get_ue_golomb(&h->gb);
yading@10: 
yading@10:         if (h->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) {
yading@10:             av_log(h->avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
yading@10:                    "values are l:%u r:%u t:%u b:%u\n", crop_left, crop_right,
yading@10:                    crop_top, crop_bottom);
yading@10: 
yading@10:             sps->crop_left   =
yading@10:             sps->crop_right  =
yading@10:             sps->crop_top    =
yading@10:             sps->crop_bottom = 0;
yading@10:         } else {
yading@10:             int vsub = (sps->chroma_format_idc == 1) ? 1 : 0;
yading@10:             int hsub = (sps->chroma_format_idc == 1 || sps->chroma_format_idc == 2) ? 1 : 0;
yading@10:             int step_x = 1 << hsub;
yading@10:             int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
yading@10: 
yading@10:             if (crop_left & (0x1F >> (sps->bit_depth_luma > 8)) &&
yading@10:                 !(h->avctx->flags & CODEC_FLAG_UNALIGNED)) {
yading@10:                 crop_left &= ~(0x1F >> (sps->bit_depth_luma > 8));
yading@10:                 av_log(h->avctx, AV_LOG_WARNING, "Reducing left cropping to %d "
yading@10:                        "chroma samples to preserve alignment.\n",
yading@10:                        crop_left);
yading@10:             }
yading@10: 
yading@10:             sps->crop_left   = crop_left   * step_x;
yading@10:             sps->crop_right  = crop_right  * step_x;
yading@10:             sps->crop_top    = crop_top    * step_y;
yading@10:             sps->crop_bottom = crop_bottom * step_y;
yading@10:         }
yading@10:     }else{
yading@10:         sps->crop_left  =
yading@10:         sps->crop_right =
yading@10:         sps->crop_top   =
yading@10:         sps->crop_bottom= 0;
yading@10:         sps->crop = 0;
yading@10:     }
yading@10: 
yading@10:     sps->vui_parameters_present_flag= get_bits1(&h->gb);
yading@10:     if( sps->vui_parameters_present_flag )
yading@10:         if (decode_vui_parameters(h, sps) < 0)
yading@10:             goto fail;
yading@10: 
yading@10:     if(!sps->sar.den)
yading@10:         sps->sar.den= 1;
yading@10: 
yading@10:     if(h->avctx->debug&FF_DEBUG_PICT_INFO){
yading@10:         static const char csp[4][5] = { "Gray", "420", "422", "444" };
yading@10:         av_log(h->avctx, AV_LOG_DEBUG, "sps:%u profile:%d/%d poc:%d ref:%d %dx%d %s %s crop:%d/%d/%d/%d %s %s %d/%d b%d reo:%d\n",
yading@10:                sps_id, sps->profile_idc, sps->level_idc,
yading@10:                sps->poc_type,
yading@10:                sps->ref_frame_count,
yading@10:                sps->mb_width, sps->mb_height,
yading@10:                sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
yading@10:                sps->direct_8x8_inference_flag ? "8B8" : "",
yading@10:                sps->crop_left, sps->crop_right,
yading@10:                sps->crop_top, sps->crop_bottom,
yading@10:                sps->vui_parameters_present_flag ? "VUI" : "",
yading@10:                csp[sps->chroma_format_idc],
yading@10:                sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
yading@10:                sps->timing_info_present_flag ? sps->time_scale : 0,
yading@10:                sps->bit_depth_luma,
yading@10:                h->sps.bitstream_restriction_flag ? sps->num_reorder_frames : -1
yading@10:                );
yading@10:     }
yading@10:     sps->new = 1;
yading@10: 
yading@10:     av_free(h->sps_buffers[sps_id]);
yading@10:     h->sps_buffers[sps_id] = sps;
yading@10:     h->sps                 = *sps;
yading@10:     h->current_sps_id      = sps_id;
yading@10: 
yading@10:     return 0;
yading@10: fail:
yading@10:     av_free(sps);
yading@10:     return -1;
yading@10: }
yading@10: 
yading@10: static void
yading@10: build_qp_table(PPS *pps, int t, int index, const int depth)
yading@10: {
yading@10:     int i;
yading@10:     const int max_qp = 51 + 6*(depth-8);
yading@10:     for(i = 0; i < max_qp+1; i++)
yading@10:         pps->chroma_qp_table[t][i] = ff_h264_chroma_qp[depth-8][av_clip(i + index, 0, max_qp)];
yading@10: }
yading@10: 
yading@10: static int more_rbsp_data_in_pps(H264Context *h, PPS *pps)
yading@10: {
yading@10:     const SPS *sps = h->sps_buffers[pps->sps_id];
yading@10:     int profile_idc = sps->profile_idc;
yading@10: 
yading@10:     if ((profile_idc == 66 || profile_idc == 77 ||
yading@10:          profile_idc == 88) && (sps->constraint_set_flags & 7)) {
yading@10:         av_log(h->avctx, AV_LOG_VERBOSE,
yading@10:                "Current profile doesn't provide more RBSP data in PPS, skipping\n");
yading@10:         return 0;
yading@10:     }
yading@10: 
yading@10:     return 1;
yading@10: }
yading@10: 
yading@10: int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length){
yading@10:     unsigned int pps_id= get_ue_golomb(&h->gb);
yading@10:     PPS *pps;
yading@10:     const int qp_bd_offset = 6*(h->sps.bit_depth_luma-8);
yading@10:     int bits_left;
yading@10: 
yading@10:     if(pps_id >= MAX_PPS_COUNT) {
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "pps_id (%d) out of range\n", pps_id);
yading@10:         return -1;
yading@10:     } else if (h->sps.bit_depth_luma > 14) {
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "Invalid luma bit depth=%d\n", h->sps.bit_depth_luma);
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     } else if (h->sps.bit_depth_luma == 11 || h->sps.bit_depth_luma == 13) {
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "Unimplemented luma bit depth=%d\n", h->sps.bit_depth_luma);
yading@10:         return AVERROR_PATCHWELCOME;
yading@10:     }
yading@10: 
yading@10:     pps= av_mallocz(sizeof(PPS));
yading@10:     if(pps == NULL)
yading@10:         return -1;
yading@10:     pps->sps_id= get_ue_golomb_31(&h->gb);
yading@10:     if((unsigned)pps->sps_id>=MAX_SPS_COUNT || h->sps_buffers[pps->sps_id] == NULL){
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "sps_id out of range\n");
yading@10:         goto fail;
yading@10:     }
yading@10: 
yading@10:     pps->cabac= get_bits1(&h->gb);
yading@10:     pps->pic_order_present= get_bits1(&h->gb);
yading@10:     pps->slice_group_count= get_ue_golomb(&h->gb) + 1;
yading@10:     if(pps->slice_group_count > 1 ){
yading@10:         pps->mb_slice_group_map_type= get_ue_golomb(&h->gb);
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "FMO not supported\n");
yading@10:         switch(pps->mb_slice_group_map_type){
yading@10:         case 0:
yading@10: #if 0
yading@10: |   for( i = 0; i <= num_slice_groups_minus1; i++ ) |   |        |
yading@10: |    run_length[ i ]                                |1  |ue(v)   |
yading@10: #endif
yading@10:             break;
yading@10:         case 2:
yading@10: #if 0
yading@10: |   for( i = 0; i < num_slice_groups_minus1; i++ )  |   |        |
yading@10: |{                                                  |   |        |
yading@10: |    top_left_mb[ i ]                               |1  |ue(v)   |
yading@10: |    bottom_right_mb[ i ]                           |1  |ue(v)   |
yading@10: |   }                                               |   |        |
yading@10: #endif
yading@10:             break;
yading@10:         case 3:
yading@10:         case 4:
yading@10:         case 5:
yading@10: #if 0
yading@10: |   slice_group_change_direction_flag               |1  |u(1)    |
yading@10: |   slice_group_change_rate_minus1                  |1  |ue(v)   |
yading@10: #endif
yading@10:             break;
yading@10:         case 6:
yading@10: #if 0
yading@10: |   slice_group_id_cnt_minus1                       |1  |ue(v)   |
yading@10: |   for( i = 0; i <= slice_group_id_cnt_minus1; i++ |   |        |
yading@10: |)                                                  |   |        |
yading@10: |    slice_group_id[ i ]                            |1  |u(v)    |
yading@10: #endif
yading@10:             break;
yading@10:         }
yading@10:     }
yading@10:     pps->ref_count[0]= get_ue_golomb(&h->gb) + 1;
yading@10:     pps->ref_count[1]= get_ue_golomb(&h->gb) + 1;
yading@10:     if(pps->ref_count[0]-1 > 32-1 || pps->ref_count[1]-1 > 32-1){
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
yading@10:         goto fail;
yading@10:     }
yading@10: 
yading@10:     pps->weighted_pred= get_bits1(&h->gb);
yading@10:     pps->weighted_bipred_idc= get_bits(&h->gb, 2);
yading@10:     pps->init_qp= get_se_golomb(&h->gb) + 26 + qp_bd_offset;
yading@10:     pps->init_qs= get_se_golomb(&h->gb) + 26 + qp_bd_offset;
yading@10:     pps->chroma_qp_index_offset[0]= get_se_golomb(&h->gb);
yading@10:     pps->deblocking_filter_parameters_present= get_bits1(&h->gb);
yading@10:     pps->constrained_intra_pred= get_bits1(&h->gb);
yading@10:     pps->redundant_pic_cnt_present = get_bits1(&h->gb);
yading@10: 
yading@10:     pps->transform_8x8_mode= 0;
yading@10:     h->dequant_coeff_pps= -1; //contents of sps/pps can change even if id doesn't, so reinit
yading@10:     memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4, sizeof(pps->scaling_matrix4));
yading@10:     memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8, sizeof(pps->scaling_matrix8));
yading@10: 
yading@10:     bits_left = bit_length - get_bits_count(&h->gb);
yading@10:     if(bits_left > 0 && more_rbsp_data_in_pps(h, pps)){
yading@10:         pps->transform_8x8_mode= get_bits1(&h->gb);
yading@10:         decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0, pps->scaling_matrix4, pps->scaling_matrix8);
yading@10:         pps->chroma_qp_index_offset[1]= get_se_golomb(&h->gb); //second_chroma_qp_index_offset
yading@10:     } else {
yading@10:         pps->chroma_qp_index_offset[1]= pps->chroma_qp_index_offset[0];
yading@10:     }
yading@10: 
yading@10:     build_qp_table(pps, 0, pps->chroma_qp_index_offset[0], h->sps.bit_depth_luma);
yading@10:     build_qp_table(pps, 1, pps->chroma_qp_index_offset[1], h->sps.bit_depth_luma);
yading@10:     if(pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
yading@10:         pps->chroma_qp_diff= 1;
yading@10: 
yading@10:     if(h->avctx->debug&FF_DEBUG_PICT_INFO){
yading@10:         av_log(h->avctx, AV_LOG_DEBUG, "pps:%u sps:%u %s slice_groups:%d ref:%d/%d %s qp:%d/%d/%d/%d %s %s %s %s\n",
yading@10:                pps_id, pps->sps_id,
yading@10:                pps->cabac ? "CABAC" : "CAVLC",
yading@10:                pps->slice_group_count,
yading@10:                pps->ref_count[0], pps->ref_count[1],
yading@10:                pps->weighted_pred ? "weighted" : "",
yading@10:                pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
yading@10:                pps->deblocking_filter_parameters_present ? "LPAR" : "",
yading@10:                pps->constrained_intra_pred ? "CONSTR" : "",
yading@10:                pps->redundant_pic_cnt_present ? "REDU" : "",
yading@10:                pps->transform_8x8_mode ? "8x8DCT" : ""
yading@10:                );
yading@10:     }
yading@10: 
yading@10:     av_free(h->pps_buffers[pps_id]);
yading@10:     h->pps_buffers[pps_id]= pps;
yading@10:     return 0;
yading@10: fail:
yading@10:     av_free(pps);
yading@10:     return -1;
yading@10: }