nengel@2: /* nengel@2: * H.26L/H.264/AVC/JVT/14496-10/... parameter set decoding nengel@2: * Copyright (c) 2003 Michael Niedermayer nengel@2: * nengel@2: * This file is part of FFmpeg. nengel@2: * nengel@2: * FFmpeg is free software; you can redistribute it and/or nengel@2: * modify it under the terms of the GNU Lesser General Public nengel@2: * License as published by the Free Software Foundation; either nengel@2: * version 2.1 of the License, or (at your option) any later version. nengel@2: * nengel@2: * FFmpeg is distributed in the hope that it will be useful, nengel@2: * but WITHOUT ANY WARRANTY; without even the implied warranty of nengel@2: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU nengel@2: * Lesser General Public License for more details. nengel@2: * nengel@2: * You should have received a copy of the GNU Lesser General Public nengel@2: * License along with FFmpeg; if not, write to the Free Software nengel@2: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA nengel@2: */ nengel@2: nengel@2: /** nengel@2: * @file nengel@2: * H.264 / AVC / MPEG4 part10 parameter set decoding. nengel@2: * @author Michael Niedermayer nengel@2: */ nengel@2: nengel@2: #include "dsputil.h" nengel@2: #include "avcodec.h" nengel@2: #include "h264_types.h" nengel@2: #include "h264_data.h" nengel@2: #include "golomb.h" nengel@2: nengel@2: nengel@2: //#undef NDEBUG nengel@2: #include nengel@2: nengel@2: static const int pixel_aspect[17][2]={ nengel@2: {0, 1}, nengel@2: {1, 1}, nengel@2: {12, 11}, nengel@2: {10, 11}, nengel@2: {16, 11}, nengel@2: {40, 33}, nengel@2: {24, 11}, nengel@2: {20, 11}, nengel@2: {32, 11}, nengel@2: {80, 33}, nengel@2: {18, 11}, nengel@2: {15, 11}, nengel@2: {64, 33}, nengel@2: {160,99}, nengel@2: {4, 3}, nengel@2: {3, 2}, nengel@2: {2, 1}, nengel@2: }; nengel@2: nengel@2: const uint8_t ff_h264_chroma_qp[52]={ nengel@2: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11, nengel@2: 12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27, nengel@2: 28,29,29,30,31,32,32,33,34,34,35,35,36,36,37,37, nengel@2: 37,38,38,38,39,39,39,39 nengel@2: }; nengel@2: nengel@2: static const uint8_t default_scaling4[2][16]={ nengel@2: { 6,13,20,28, nengel@2: 13,20,28,32, nengel@2: 20,28,32,37, nengel@2: 28,32,37,42 nengel@2: },{ nengel@2: 10,14,20,24, nengel@2: 14,20,24,27, nengel@2: 20,24,27,30, nengel@2: 24,27,30,34 nengel@2: }}; nengel@2: nengel@2: static const uint8_t default_scaling8[2][64]={ nengel@2: { 6,10,13,16,18,23,25,27, nengel@2: 10,11,16,18,23,25,27,29, nengel@2: 13,16,18,23,25,27,29,31, nengel@2: 16,18,23,25,27,29,31,33, nengel@2: 18,23,25,27,29,31,33,36, nengel@2: 23,25,27,29,31,33,36,38, nengel@2: 25,27,29,31,33,36,38,40, nengel@2: 27,29,31,33,36,38,40,42 nengel@2: },{ nengel@2: 9,13,15,17,19,21,22,24, nengel@2: 13,13,17,19,21,22,24,25, nengel@2: 15,17,19,21,22,24,25,27, nengel@2: 17,19,21,22,24,25,27,28, nengel@2: 19,21,22,24,25,27,28,30, nengel@2: 21,22,24,25,27,28,30,32, nengel@2: 22,24,25,27,28,30,32,33, nengel@2: 24,25,27,28,30,32,33,35 nengel@2: }}; nengel@2: nengel@2: static inline int decode_hrd_parameters(GetBitContext *gb, SPS *sps){ nengel@2: int cpb_count, i; nengel@2: cpb_count = get_ue_golomb_31(gb) + 1; nengel@2: nengel@2: if(cpb_count > 32){ nengel@2: av_log(AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count); nengel@2: return -1; nengel@2: } nengel@2: nengel@2: get_bits(gb, 4); /* bit_rate_scale */ nengel@2: get_bits(gb, 4); /* cpb_size_scale */ nengel@2: for(i=0; iinitial_cpb_removal_delay_length = get_bits(gb, 5) + 1; nengel@2: sps->cpb_removal_delay_length = get_bits(gb, 5) + 1; nengel@2: sps->dpb_output_delay_length = get_bits(gb, 5) + 1; nengel@2: sps->time_offset_length = get_bits(gb, 5); nengel@2: sps->cpb_cnt = cpb_count; nengel@2: return 0; nengel@2: } nengel@2: nengel@2: static inline int decode_vui_parameters(GetBitContext *gb, SPS *sps){ nengel@2: int aspect_ratio_info_present_flag; nengel@2: unsigned int aspect_ratio_idc; nengel@2: nengel@2: aspect_ratio_info_present_flag= get_bits1(gb); nengel@2: nengel@2: if( aspect_ratio_info_present_flag ) { nengel@2: aspect_ratio_idc= get_bits(gb, 8); nengel@2: if( aspect_ratio_idc == EXTENDED_SAR ) { nengel@2: sps->num= get_bits(gb, 16); nengel@2: sps->den= get_bits(gb, 16); nengel@2: }else if(aspect_ratio_idc < sizeof(pixel_aspect)/sizeof(int[2])){ nengel@2: //sps->sar= pixel_aspect[aspect_ratio_idc]; nengel@2: }else{ nengel@2: av_log( AV_LOG_ERROR, "illegal aspect ratio idc %d\n", aspect_ratio_idc); nengel@2: // return -1; nengel@2: } nengel@2: }else{ nengel@2: sps->num= nengel@2: sps->den= 0; nengel@2: } nengel@2: nengel@2: if(get_bits1(gb)){ /* overscan_info_present_flag */ nengel@2: get_bits1(gb); /* overscan_appropriate_flag */ nengel@2: } nengel@2: nengel@2: sps->video_signal_type_present_flag = get_bits1(gb); nengel@2: if(sps->video_signal_type_present_flag){ nengel@2: get_bits(gb, 3); /* video_format */ nengel@2: sps->full_range = get_bits1(gb); /* video_full_range_flag */ nengel@2: nengel@2: sps->colour_description_present_flag = get_bits1(gb); nengel@2: if(sps->colour_description_present_flag){ nengel@2: sps->color_primaries = get_bits(gb, 8); /* colour_primaries */ nengel@2: sps->color_trc = get_bits(gb, 8); /* transfer_characteristics */ nengel@2: sps->colorspace = get_bits(gb, 8); /* matrix_coefficients */ nengel@2: if (sps->color_primaries >= AVCOL_PRI_NB) nengel@2: sps->color_primaries = AVCOL_PRI_UNSPECIFIED; nengel@2: if (sps->color_trc >= AVCOL_TRC_NB) nengel@2: sps->color_trc = AVCOL_TRC_UNSPECIFIED; nengel@2: if (sps->colorspace >= AVCOL_SPC_NB) nengel@2: sps->colorspace = AVCOL_SPC_UNSPECIFIED; nengel@2: } nengel@2: } nengel@2: nengel@2: if(get_bits1(gb)){ /* chroma_location_info_present_flag */ nengel@2: av_log(AV_LOG_ERROR, "chroma_location_info_present_flag found, but not supported\n"); nengel@2: (void) (get_ue_golomb(gb)+1); /* chroma_sample_location_type_top_field */ nengel@2: (void) get_ue_golomb(gb); /* chroma_sample_location_type_bottom_field */ nengel@2: } nengel@2: nengel@2: sps->timing_info_present_flag = get_bits1(gb); nengel@2: if(sps->timing_info_present_flag){ nengel@2: sps->num_units_in_tick = get_bits_long(gb, 32); nengel@2: sps->time_scale = get_bits_long(gb, 32); nengel@2: if(!sps->num_units_in_tick || !sps->time_scale){ nengel@2: av_log(AV_LOG_ERROR, "time_scale/num_units_in_tick invalid or unsupported (%d/%d)\n", sps->time_scale, sps->num_units_in_tick); nengel@2: return -1; nengel@2: } nengel@2: sps->fixed_frame_rate_flag = get_bits1(gb); nengel@2: } nengel@2: nengel@2: sps->nal_hrd_parameters_present_flag = get_bits1(gb); nengel@2: if(sps->nal_hrd_parameters_present_flag) nengel@2: if(decode_hrd_parameters(gb, sps) < 0) nengel@2: return -1; nengel@2: sps->vcl_hrd_parameters_present_flag = get_bits1(gb); nengel@2: if(sps->vcl_hrd_parameters_present_flag) nengel@2: if(decode_hrd_parameters(gb, sps) < 0) nengel@2: return -1; nengel@2: if(sps->nal_hrd_parameters_present_flag || sps->vcl_hrd_parameters_present_flag) nengel@2: get_bits1(gb); /* low_delay_hrd_flag */ nengel@2: sps->pic_struct_present_flag = get_bits1(gb); nengel@2: nengel@2: sps->bitstream_restriction_flag = get_bits1(gb); nengel@2: if(sps->bitstream_restriction_flag){ nengel@2: get_bits1(gb); /* motion_vectors_over_pic_boundaries_flag */ nengel@2: get_ue_golomb(gb); /* max_bytes_per_pic_denom */ nengel@2: get_ue_golomb(gb); /* max_bits_per_mb_denom */ nengel@2: get_ue_golomb(gb); /* log2_max_mv_length_horizontal */ nengel@2: get_ue_golomb(gb); /* log2_max_mv_length_vertical */ nengel@2: sps->num_reorder_frames= get_ue_golomb(gb); nengel@2: get_ue_golomb(gb); /*max_dec_frame_buffering*/ nengel@2: nengel@2: if(sps->num_reorder_frames > 16 /*max_dec_frame_buffering || max_dec_frame_buffering > 16*/){ nengel@2: av_log(AV_LOG_ERROR, "illegal num_reorder_frames %d\n", sps->num_reorder_frames); nengel@2: return -1; nengel@2: } nengel@2: } nengel@2: nengel@2: return 0; nengel@2: } nengel@2: nengel@2: static void decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size, const uint8_t *jvt_list, const uint8_t *fallback_list){ nengel@2: int i, last = 8, next = 8; nengel@2: const uint8_t *scan = size == 16 ? zigzag_scan : ff_zigzag_direct; nengel@2: if(!get_bits1(gb)) /* matrix not written, we use the predicted one */ nengel@2: memcpy(factors, fallback_list, size*sizeof(uint8_t)); nengel@2: else nengel@2: for(i=0;iscaling_matrix_present; nengel@2: const uint8_t *fallback[4] = { nengel@2: fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0], nengel@2: fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1], nengel@2: fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0], nengel@2: fallback_sps ? sps->scaling_matrix8[1] : default_scaling8[1] nengel@2: }; nengel@2: if(get_bits1(gb)){ nengel@2: sps->scaling_matrix_present |= is_sps; nengel@2: decode_scaling_list(gb, scaling_matrix4[0],16,default_scaling4[0],fallback[0]); // Intra, Y nengel@2: decode_scaling_list(gb, scaling_matrix4[1],16,default_scaling4[0],scaling_matrix4[0]); // Intra, Cr nengel@2: decode_scaling_list(gb, scaling_matrix4[2],16,default_scaling4[0],scaling_matrix4[1]); // Intra, Cb nengel@2: decode_scaling_list(gb, scaling_matrix4[3],16,default_scaling4[1],fallback[1]); // Inter, Y nengel@2: decode_scaling_list(gb, scaling_matrix4[4],16,default_scaling4[1],scaling_matrix4[3]); // Inter, Cr nengel@2: decode_scaling_list(gb, scaling_matrix4[5],16,default_scaling4[1],scaling_matrix4[4]); // Inter, Cb nengel@2: if(is_sps || pps->transform_8x8_mode){ nengel@2: decode_scaling_list(gb, scaling_matrix8[0],64,default_scaling8[0],fallback[2]); // Intra, Y nengel@2: decode_scaling_list(gb, scaling_matrix8[1],64,default_scaling8[1],fallback[3]); // Inter, Y nengel@2: } nengel@2: } nengel@2: } nengel@2: nengel@2: int ff_h264_decode_seq_parameter_set(NalContext *n, GetBitContext *gb){ nengel@2: int profile_idc, level_idc; nengel@2: unsigned int sps_id; nengel@2: int i; nengel@2: SPS *sps; nengel@2: nengel@2: profile_idc= get_bits(gb, 8); nengel@2: get_bits1(gb); //constraint_set0_flag nengel@2: get_bits1(gb); //constraint_set1_flag nengel@2: get_bits1(gb); //constraint_set2_flag nengel@2: get_bits1(gb); //constraint_set3_flag nengel@2: get_bits(gb, 4); // reserved nengel@2: level_idc= get_bits(gb, 8); nengel@2: sps_id= get_ue_golomb_31(gb); nengel@2: nengel@2: if(sps_id >= MAX_SPS_COUNT) { nengel@2: av_log(AV_LOG_ERROR, "sps_id (%d) out of range\n", sps_id); nengel@2: return -1; nengel@2: } nengel@2: if (!n->sps_buffers[sps_id]) nengel@2: n->sps_buffers[sps_id]= av_mallocz(sizeof(SPS)); nengel@2: nengel@2: sps = n->sps_buffers[sps_id]; nengel@2: if(sps == NULL) nengel@2: return -1; nengel@2: nengel@2: sps->profile_idc= profile_idc; nengel@2: sps->level_idc= level_idc; nengel@2: nengel@2: memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4)); nengel@2: memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8)); nengel@2: sps->scaling_matrix_present = 0; nengel@2: nengel@2: if(sps->profile_idc >= 100){ //high profile nengel@2: sps->chroma_format_idc= get_ue_golomb_31(gb); nengel@2: if(sps->chroma_format_idc == 3) nengel@2: sps->residual_color_transform_flag = get_bits1(gb); nengel@2: sps->bit_depth_luma = get_ue_golomb(gb) + 8; nengel@2: sps->bit_depth_chroma = get_ue_golomb(gb) + 8; nengel@2: sps->transform_bypass = get_bits1(gb); nengel@2: decode_scaling_matrices(gb, sps, NULL, 1, sps->scaling_matrix4, sps->scaling_matrix8); nengel@2: }else{ nengel@2: sps->chroma_format_idc= 1; nengel@2: sps->bit_depth_luma = 8; nengel@2: sps->bit_depth_chroma = 8; nengel@2: } nengel@2: nengel@2: sps->log2_max_frame_num= get_ue_golomb(gb) + 4; nengel@2: sps->poc_type= get_ue_golomb_31(gb); nengel@2: nengel@2: if(sps->poc_type == 0){ //FIXME #define nengel@2: sps->log2_max_poc_lsb= get_ue_golomb(gb) + 4; nengel@2: } else if(sps->poc_type == 1){//FIXME #define nengel@2: sps->delta_pic_order_always_zero_flag= get_bits1(gb); nengel@2: sps->offset_for_non_ref_pic= get_se_golomb(gb); nengel@2: sps->offset_for_top_to_bottom_field= get_se_golomb(gb); nengel@2: sps->poc_cycle_length = get_ue_golomb(gb); nengel@2: nengel@2: if((unsigned)sps->poc_cycle_length >= FF_ARRAY_ELEMS(sps->offset_for_ref_frame)){ nengel@2: av_log(AV_LOG_ERROR, "poc_cycle_length overflow %u\n", sps->poc_cycle_length); nengel@2: goto fail; nengel@2: } nengel@2: nengel@2: for(i=0; ipoc_cycle_length; i++) nengel@2: sps->offset_for_ref_frame[i]= get_se_golomb(gb); nengel@2: }else if(sps->poc_type != 2){ nengel@2: av_log(AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type); nengel@2: goto fail; nengel@2: } nengel@2: nengel@2: sps->ref_frame_count= get_ue_golomb_31(gb); nengel@2: if(sps->ref_frame_count >= 32){ nengel@2: av_log(AV_LOG_ERROR, "too many reference frames\n"); nengel@2: goto fail; nengel@2: } nengel@2: sps->gaps_in_frame_num_allowed_flag= get_bits1(gb); nengel@2: sps->mb_width = get_ue_golomb(gb) + 1; nengel@2: sps->mb_height= get_ue_golomb(gb) + 1; nengel@2: nengel@2: nengel@2: sps->frame_mbs_only_flag= get_bits1(gb); nengel@2: if(!sps->frame_mbs_only_flag){ nengel@2: av_log(AV_LOG_ERROR, "MBAFF support not included\n"); nengel@2: get_bits1(gb); nengel@2: }else nengel@2: sps->mb_aff= 0; nengel@2: nengel@2: sps->direct_8x8_inference_flag= get_bits1(gb); nengel@2: if(!sps->frame_mbs_only_flag && !sps->direct_8x8_inference_flag){ nengel@2: av_log(AV_LOG_ERROR, "This stream was generated by a broken encoder, invalid 8x8 inference\n"); nengel@2: goto fail; nengel@2: } nengel@2: nengel@2: sps->crop= get_bits1(gb); nengel@2: if(sps->crop){ nengel@2: sps->crop_left = get_ue_golomb(gb); nengel@2: sps->crop_right = get_ue_golomb(gb); nengel@2: sps->crop_top = get_ue_golomb(gb); nengel@2: sps->crop_bottom= get_ue_golomb(gb); nengel@2: if(sps->crop_left || sps->crop_top){ nengel@2: av_log( AV_LOG_ERROR, "insane cropping not completely supported, this could look slightly wrong ...\n"); nengel@2: } nengel@2: if(sps->crop_right >= 8 || sps->crop_bottom >= (8>> !sps->frame_mbs_only_flag)){ nengel@2: av_log( AV_LOG_ERROR, "brainfart cropping not supported, this could look slightly wrong ...\n"); nengel@2: } nengel@2: }else { nengel@2: nengel@2: sps->crop_left = nengel@2: sps->crop_right = nengel@2: sps->crop_top = nengel@2: sps->crop_bottom= 0; nengel@2: } nengel@2: nengel@2: sps->vui_parameters_present_flag= get_bits1(gb); nengel@2: if( sps->vui_parameters_present_flag ) nengel@2: if (decode_vui_parameters(gb, sps) < 0) nengel@2: goto fail; nengel@2: nengel@2: nengel@2: n->sps = *sps; nengel@2: nengel@2: if( sps->bitstream_restriction_flag){ nengel@2: n->has_b_frames = sps->num_reorder_frames; nengel@2: } nengel@2: else nengel@2: n->has_b_frames= MAX_DELAYED_PIC_COUNT; nengel@2: nengel@2: return 0; nengel@2: fail: nengel@2: av_free(sps); nengel@2: return -1; nengel@2: } nengel@2: nengel@2: static void nengel@2: build_qp_table(PPS *pps, int t, int index) nengel@2: { nengel@2: int i; nengel@2: for(i = 0; i < 52; i++) nengel@2: pps->chroma_qp_table[t][i] = ff_h264_chroma_qp[av_clip(i + index, 0, 51)]; nengel@2: } nengel@2: nengel@2: int ff_h264_decode_picture_parameter_set(NalContext *n, GetBitContext *gb, int bit_length){ nengel@2: unsigned int pps_id= get_ue_golomb(gb); nengel@2: PPS *pps; nengel@2: nengel@2: if(pps_id >= MAX_PPS_COUNT) { nengel@2: av_log(AV_LOG_ERROR, "pps_id (%d) out of range\n", pps_id); nengel@2: return -1; nengel@2: } nengel@2: if (!n->pps_buffers[pps_id]) nengel@2: n->pps_buffers[pps_id]= av_mallocz(sizeof(PPS)); nengel@2: pps = n->pps_buffers[pps_id]; nengel@2: if(pps == NULL) nengel@2: return -1; nengel@2: pps->sps_id= get_ue_golomb_31(gb); nengel@2: if((unsigned)pps->sps_id>=MAX_SPS_COUNT || n->sps_buffers[pps->sps_id] == NULL){ nengel@2: av_log(AV_LOG_ERROR, "sps_id out of range\n"); nengel@2: goto fail; nengel@2: } nengel@2: nengel@2: pps->cabac= get_bits1(gb); nengel@2: pps->pic_order_present= get_bits1(gb); nengel@2: if(pps->pic_order_present){ nengel@2: av_log(AV_LOG_ERROR, "no interlaces support\n"); nengel@2: } nengel@2: pps->slice_group_count= get_ue_golomb(gb) + 1; nengel@2: if(pps->slice_group_count > 1 ){ nengel@2: pps->mb_slice_group_map_type= get_ue_golomb(gb); nengel@2: av_log(AV_LOG_ERROR, "multiple slices not supported\n"); nengel@2: } nengel@2: pps->ref_count[0]= get_ue_golomb(gb) + 1; nengel@2: pps->ref_count[1]= get_ue_golomb(gb) + 1; nengel@2: if(pps->ref_count[0]> 32 || pps->ref_count[1]> 32){ nengel@2: av_log(AV_LOG_ERROR, "reference overflow (pps)\n"); nengel@2: goto fail; nengel@2: } nengel@2: nengel@2: pps->weighted_pred= get_bits1(gb); nengel@2: pps->weighted_bipred_idc= get_bits(gb, 2); nengel@2: pps->init_qp= get_se_golomb(gb) + 26; nengel@2: pps->init_qs= get_se_golomb(gb) + 26; nengel@2: pps->chroma_qp_index_offset[0]= get_se_golomb(gb); nengel@2: pps->deblocking_filter_parameters_present= get_bits1(gb); nengel@2: pps->constrained_intra_pred= get_bits1(gb); nengel@2: pps->redundant_pic_cnt_present = get_bits1(gb); nengel@2: nengel@2: pps->transform_8x8_mode= 0; nengel@2: memcpy(pps->scaling_matrix4, n->sps_buffers[pps->sps_id]->scaling_matrix4, sizeof(pps->scaling_matrix4)); nengel@2: memcpy(pps->scaling_matrix8, n->sps_buffers[pps->sps_id]->scaling_matrix8, sizeof(pps->scaling_matrix8)); nengel@2: nengel@2: if(get_bits_count(gb) < bit_length){ nengel@2: pps->transform_8x8_mode= get_bits1(gb); nengel@2: decode_scaling_matrices(gb, n->sps_buffers[pps->sps_id], pps, 0, pps->scaling_matrix4, pps->scaling_matrix8); nengel@2: pps->chroma_qp_index_offset[1]= get_se_golomb(gb); //second_chroma_qp_index_offset nengel@2: } else { nengel@2: pps->chroma_qp_index_offset[1]= pps->chroma_qp_index_offset[0]; nengel@2: } nengel@2: nengel@2: build_qp_table(pps, 0, pps->chroma_qp_index_offset[0]); nengel@2: build_qp_table(pps, 1, pps->chroma_qp_index_offset[1]); nengel@2: if(pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1]) nengel@2: pps->chroma_qp_diff= 1; nengel@2: nengel@2: return 0; nengel@2: fail: nengel@2: av_free(pps); nengel@2: return -1; nengel@2: }