/* * Copyright (c) 2014 Tim Walker * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavcodec/get_bits.h" #include "libavcodec/golomb.h" #include "libavcodec/hevc/hevc.h" #include "libavutil/intreadwrite.h" #include "libavutil/mem.h" #include "avc.h" #include "avio.h" #include "avio_internal.h" #include "hevc.h" #define MAX_SPATIAL_SEGMENTATION 4096 // max. value of u(12) field enum { VPS_INDEX, SPS_INDEX, PPS_INDEX, SEI_PREFIX_INDEX, SEI_SUFFIX_INDEX, NB_ARRAYS }; typedef struct HVCCNALUnitArray { uint8_t array_completeness; uint8_t NAL_unit_type; uint16_t numNalus; uint16_t *nalUnitLength; uint8_t **nalUnit; } HVCCNALUnitArray; typedef struct HEVCDecoderConfigurationRecord { uint8_t configurationVersion; uint8_t general_profile_space; uint8_t general_tier_flag; uint8_t general_profile_idc; uint32_t general_profile_compatibility_flags; uint64_t general_constraint_indicator_flags; uint8_t general_level_idc; uint16_t min_spatial_segmentation_idc; uint8_t parallelismType; uint8_t chromaFormat; uint8_t bitDepthLumaMinus8; uint8_t bitDepthChromaMinus8; uint16_t avgFrameRate; uint8_t constantFrameRate; uint8_t numTemporalLayers; uint8_t temporalIdNested; uint8_t lengthSizeMinusOne; uint8_t numOfArrays; HVCCNALUnitArray arrays[NB_ARRAYS]; } HEVCDecoderConfigurationRecord; typedef struct HVCCProfileTierLevel { uint8_t profile_space; uint8_t tier_flag; uint8_t profile_idc; uint32_t profile_compatibility_flags; uint64_t constraint_indicator_flags; uint8_t level_idc; } HVCCProfileTierLevel; static void hvcc_update_ptl(HEVCDecoderConfigurationRecord *hvcc, HVCCProfileTierLevel *ptl) { /* * The value of general_profile_space in all the parameter sets must be * identical. */ hvcc->general_profile_space = ptl->profile_space; /* * The level indication general_level_idc must indicate a level of * capability equal to or greater than the highest level indicated for the * highest tier in all the parameter sets. */ if (hvcc->general_tier_flag < ptl->tier_flag) hvcc->general_level_idc = ptl->level_idc; else hvcc->general_level_idc = FFMAX(hvcc->general_level_idc, ptl->level_idc); /* * The tier indication general_tier_flag must indicate a tier equal to or * greater than the highest tier indicated in all the parameter sets. */ hvcc->general_tier_flag = FFMAX(hvcc->general_tier_flag, ptl->tier_flag); /* * The profile indication general_profile_idc must indicate a profile to * which the stream associated with this configuration record conforms. * * If the sequence parameter sets are marked with different profiles, then * the stream may need examination to determine which profile, if any, the * entire stream conforms to. If the entire stream is not examined, or the * examination reveals that there is no profile to which the entire stream * conforms, then the entire stream must be split into two or more * sub-streams with separate configuration records in which these rules can * be met. * * Note: set the profile to the highest value for the sake of simplicity. */ hvcc->general_profile_idc = FFMAX(hvcc->general_profile_idc, ptl->profile_idc); /* * Each bit in general_profile_compatibility_flags may only be set if all * the parameter sets set that bit. */ hvcc->general_profile_compatibility_flags &= ptl->profile_compatibility_flags; /* * Each bit in general_constraint_indicator_flags may only be set if all * the parameter sets set that bit. */ hvcc->general_constraint_indicator_flags &= ptl->constraint_indicator_flags; } static void hvcc_parse_ptl(GetBitContext *gb, HEVCDecoderConfigurationRecord *hvcc, unsigned int max_sub_layers_minus1) { unsigned int i; HVCCProfileTierLevel general_ptl; uint8_t sub_layer_profile_present_flag[HEVC_MAX_SUB_LAYERS]; uint8_t sub_layer_level_present_flag[HEVC_MAX_SUB_LAYERS]; general_ptl.profile_space = get_bits(gb, 2); general_ptl.tier_flag = get_bits1(gb); general_ptl.profile_idc = get_bits(gb, 5); general_ptl.profile_compatibility_flags = get_bits_long(gb, 32); general_ptl.constraint_indicator_flags = get_bits64(gb, 48); general_ptl.level_idc = get_bits(gb, 8); hvcc_update_ptl(hvcc, &general_ptl); for (i = 0; i < max_sub_layers_minus1; i++) { sub_layer_profile_present_flag[i] = get_bits1(gb); sub_layer_level_present_flag[i] = get_bits1(gb); } if (max_sub_layers_minus1 > 0) for (i = max_sub_layers_minus1; i < 8; i++) skip_bits(gb, 2); // reserved_zero_2bits[i] for (i = 0; i < max_sub_layers_minus1; i++) { if (sub_layer_profile_present_flag[i]) { /* * sub_layer_profile_space[i] u(2) * sub_layer_tier_flag[i] u(1) * sub_layer_profile_idc[i] u(5) * sub_layer_profile_compatibility_flag[i][0..31] u(32) * sub_layer_progressive_source_flag[i] u(1) * sub_layer_interlaced_source_flag[i] u(1) * sub_layer_non_packed_constraint_flag[i] u(1) * sub_layer_frame_only_constraint_flag[i] u(1) * sub_layer_reserved_zero_44bits[i] u(44) */ skip_bits_long(gb, 32); skip_bits_long(gb, 32); skip_bits (gb, 24); } if (sub_layer_level_present_flag[i]) skip_bits(gb, 8); } } static void skip_sub_layer_hrd_parameters(GetBitContext *gb, unsigned int cpb_cnt_minus1, uint8_t sub_pic_hrd_params_present_flag) { unsigned int i; for (i = 0; i <= cpb_cnt_minus1; i++) { get_ue_golomb_long(gb); // bit_rate_value_minus1 get_ue_golomb_long(gb); // cpb_size_value_minus1 if (sub_pic_hrd_params_present_flag) { get_ue_golomb_long(gb); // cpb_size_du_value_minus1 get_ue_golomb_long(gb); // bit_rate_du_value_minus1 } skip_bits1(gb); // cbr_flag } } static int skip_hrd_parameters(GetBitContext *gb, uint8_t cprms_present_flag, unsigned int max_sub_layers_minus1) { unsigned int i; uint8_t sub_pic_hrd_params_present_flag = 0; uint8_t nal_hrd_parameters_present_flag = 0; uint8_t vcl_hrd_parameters_present_flag = 0; if (cprms_present_flag) { nal_hrd_parameters_present_flag = get_bits1(gb); vcl_hrd_parameters_present_flag = get_bits1(gb); if (nal_hrd_parameters_present_flag || vcl_hrd_parameters_present_flag) { sub_pic_hrd_params_present_flag = get_bits1(gb); if (sub_pic_hrd_params_present_flag) /* * tick_divisor_minus2 u(8) * du_cpb_removal_delay_increment_length_minus1 u(5) * sub_pic_cpb_params_in_pic_timing_sei_flag u(1) * dpb_output_delay_du_length_minus1 u(5) */ skip_bits(gb, 19); /* * bit_rate_scale u(4) * cpb_size_scale u(4) */ skip_bits(gb, 8); if (sub_pic_hrd_params_present_flag) skip_bits(gb, 4); // cpb_size_du_scale /* * initial_cpb_removal_delay_length_minus1 u(5) * au_cpb_removal_delay_length_minus1 u(5) * dpb_output_delay_length_minus1 u(5) */ skip_bits(gb, 15); } } for (i = 0; i <= max_sub_layers_minus1; i++) { unsigned int cpb_cnt_minus1 = 0; uint8_t low_delay_hrd_flag = 0; uint8_t fixed_pic_rate_within_cvs_flag = 0; uint8_t fixed_pic_rate_general_flag = get_bits1(gb); if (!fixed_pic_rate_general_flag) fixed_pic_rate_within_cvs_flag = get_bits1(gb); if (fixed_pic_rate_within_cvs_flag) get_ue_golomb_long(gb); // elemental_duration_in_tc_minus1 else low_delay_hrd_flag = get_bits1(gb); if (!low_delay_hrd_flag) { cpb_cnt_minus1 = get_ue_golomb_long(gb); if (cpb_cnt_minus1 > 31) return AVERROR_INVALIDDATA; } if (nal_hrd_parameters_present_flag) skip_sub_layer_hrd_parameters(gb, cpb_cnt_minus1, sub_pic_hrd_params_present_flag); if (vcl_hrd_parameters_present_flag) skip_sub_layer_hrd_parameters(gb, cpb_cnt_minus1, sub_pic_hrd_params_present_flag); } return 0; } static void skip_timing_info(GetBitContext *gb) { skip_bits_long(gb, 32); // num_units_in_tick skip_bits_long(gb, 32); // time_scale if (get_bits1(gb)) // poc_proportional_to_timing_flag get_ue_golomb_long(gb); // num_ticks_poc_diff_one_minus1 } static void hvcc_parse_vui(GetBitContext *gb, HEVCDecoderConfigurationRecord *hvcc, unsigned int max_sub_layers_minus1) { unsigned int min_spatial_segmentation_idc; if (get_bits1(gb)) // aspect_ratio_info_present_flag if (get_bits(gb, 8) == 255) // aspect_ratio_idc skip_bits_long(gb, 32); // sar_width u(16), sar_height u(16) if (get_bits1(gb)) // overscan_info_present_flag skip_bits1(gb); // overscan_appropriate_flag if (get_bits1(gb)) { // video_signal_type_present_flag skip_bits(gb, 4); // video_format u(3), video_full_range_flag u(1) if (get_bits1(gb)) // colour_description_present_flag /* * colour_primaries u(8) * transfer_characteristics u(8) * matrix_coeffs u(8) */ skip_bits(gb, 24); } if (get_bits1(gb)) { // chroma_loc_info_present_flag get_ue_golomb_long(gb); // chroma_sample_loc_type_top_field get_ue_golomb_long(gb); // chroma_sample_loc_type_bottom_field } /* * neutral_chroma_indication_flag u(1) * field_seq_flag u(1) * frame_field_info_present_flag u(1) */ skip_bits(gb, 3); if (get_bits1(gb)) { // default_display_window_flag get_ue_golomb_long(gb); // def_disp_win_left_offset get_ue_golomb_long(gb); // def_disp_win_right_offset get_ue_golomb_long(gb); // def_disp_win_top_offset get_ue_golomb_long(gb); // def_disp_win_bottom_offset } if (get_bits1(gb)) { // vui_timing_info_present_flag skip_timing_info(gb); if (get_bits1(gb)) // vui_hrd_parameters_present_flag skip_hrd_parameters(gb, 1, max_sub_layers_minus1); } if (get_bits1(gb)) { // bitstream_restriction_flag /* * tiles_fixed_structure_flag u(1) * motion_vectors_over_pic_boundaries_flag u(1) * restricted_ref_pic_lists_flag u(1) */ skip_bits(gb, 3); min_spatial_segmentation_idc = get_ue_golomb_long(gb); /* * unsigned int(12) min_spatial_segmentation_idc; * * The min_spatial_segmentation_idc indication must indicate a level of * spatial segmentation equal to or less than the lowest level of * spatial segmentation indicated in all the parameter sets. */ hvcc->min_spatial_segmentation_idc = FFMIN(hvcc->min_spatial_segmentation_idc, min_spatial_segmentation_idc); get_ue_golomb_long(gb); // max_bytes_per_pic_denom get_ue_golomb_long(gb); // max_bits_per_min_cu_denom get_ue_golomb_long(gb); // log2_max_mv_length_horizontal get_ue_golomb_long(gb); // log2_max_mv_length_vertical } } static void skip_sub_layer_ordering_info(GetBitContext *gb) { get_ue_golomb_long(gb); // max_dec_pic_buffering_minus1 get_ue_golomb_long(gb); // max_num_reorder_pics get_ue_golomb_long(gb); // max_latency_increase_plus1 } static int hvcc_parse_vps(GetBitContext *gb, HEVCDecoderConfigurationRecord *hvcc) { unsigned int vps_max_sub_layers_minus1; /* * vps_video_parameter_set_id u(4) * vps_reserved_three_2bits u(2) * vps_max_layers_minus1 u(6) */ skip_bits(gb, 12); vps_max_sub_layers_minus1 = get_bits(gb, 3); /* * numTemporalLayers greater than 1 indicates that the stream to which this * configuration record applies is temporally scalable and the contained * number of temporal layers (also referred to as temporal sub-layer or * sub-layer in ISO/IEC 23008-2) is equal to numTemporalLayers. Value 1 * indicates that the stream is not temporally scalable. Value 0 indicates * that it is unknown whether the stream is temporally scalable. */ hvcc->numTemporalLayers = FFMAX(hvcc->numTemporalLayers, vps_max_sub_layers_minus1 + 1); /* * vps_temporal_id_nesting_flag u(1) * vps_reserved_0xffff_16bits u(16) */ skip_bits(gb, 17); hvcc_parse_ptl(gb, hvcc, vps_max_sub_layers_minus1); /* nothing useful for hvcC past this point */ return 0; } static void skip_scaling_list_data(GetBitContext *gb) { int i, j, k, num_coeffs; for (i = 0; i < 4; i++) for (j = 0; j < (i == 3 ? 2 : 6); j++) if (!get_bits1(gb)) // scaling_list_pred_mode_flag[i][j] get_ue_golomb_long(gb); // scaling_list_pred_matrix_id_delta[i][j] else { num_coeffs = FFMIN(64, 1 << (4 + (i << 1))); if (i > 1) get_se_golomb_long(gb); // scaling_list_dc_coef_minus8[i-2][j] for (k = 0; k < num_coeffs; k++) get_se_golomb_long(gb); // scaling_list_delta_coef } } static int parse_rps(GetBitContext *gb, unsigned int rps_idx, unsigned int num_rps, unsigned int num_delta_pocs[HEVC_MAX_SHORT_TERM_REF_PIC_SETS]) { unsigned int i; if (rps_idx && get_bits1(gb)) { // inter_ref_pic_set_prediction_flag /* this should only happen for slice headers, and this isn't one */ if (rps_idx >= num_rps) return AVERROR_INVALIDDATA; skip_bits1 (gb); // delta_rps_sign get_ue_golomb_long(gb); // abs_delta_rps_minus1 num_delta_pocs[rps_idx] = 0; /* * From libavcodec/hevc_ps.c: * * if (is_slice_header) { * //foo * } else * rps_ridx = &sps->st_rps[rps - sps->st_rps - 1]; * * where: * rps: &sps->st_rps[rps_idx] * sps->st_rps: &sps->st_rps[0] * is_slice_header: rps_idx == num_rps * * thus: * if (num_rps != rps_idx) * rps_ridx = &sps->st_rps[rps_idx - 1]; * * NumDeltaPocs[RefRpsIdx]: num_delta_pocs[rps_idx - 1] */ for (i = 0; i <= num_delta_pocs[rps_idx - 1]; i++) { uint8_t use_delta_flag = 0; uint8_t used_by_curr_pic_flag = get_bits1(gb); if (!used_by_curr_pic_flag) use_delta_flag = get_bits1(gb); if (used_by_curr_pic_flag || use_delta_flag) num_delta_pocs[rps_idx]++; } } else { unsigned int num_negative_pics = get_ue_golomb_long(gb); unsigned int num_positive_pics = get_ue_golomb_long(gb); if ((num_positive_pics + (uint64_t)num_negative_pics) * 2 > get_bits_left(gb)) return AVERROR_INVALIDDATA; num_delta_pocs[rps_idx] = num_negative_pics + num_positive_pics; for (i = 0; i < num_negative_pics; i++) { get_ue_golomb_long(gb); // delta_poc_s0_minus1[rps_idx] skip_bits1 (gb); // used_by_curr_pic_s0_flag[rps_idx] } for (i = 0; i < num_positive_pics; i++) { get_ue_golomb_long(gb); // delta_poc_s1_minus1[rps_idx] skip_bits1 (gb); // used_by_curr_pic_s1_flag[rps_idx] } } return 0; } static int hvcc_parse_sps(GetBitContext *gb, HEVCDecoderConfigurationRecord *hvcc) { unsigned int i, sps_max_sub_layers_minus1, log2_max_pic_order_cnt_lsb_minus4; unsigned int num_short_term_ref_pic_sets, num_delta_pocs[HEVC_MAX_SHORT_TERM_REF_PIC_SETS]; skip_bits(gb, 4); // sps_video_parameter_set_id sps_max_sub_layers_minus1 = get_bits (gb, 3); /* * numTemporalLayers greater than 1 indicates that the stream to which this * configuration record applies is temporally scalable and the contained * number of temporal layers (also referred to as temporal sub-layer or * sub-layer in ISO/IEC 23008-2) is equal to numTemporalLayers. Value 1 * indicates that the stream is not temporally scalable. Value 0 indicates * that it is unknown whether the stream is temporally scalable. */ hvcc->numTemporalLayers = FFMAX(hvcc->numTemporalLayers, sps_max_sub_layers_minus1 + 1); hvcc->temporalIdNested = get_bits1(gb); hvcc_parse_ptl(gb, hvcc, sps_max_sub_layers_minus1); get_ue_golomb_long(gb); // sps_seq_parameter_set_id hvcc->chromaFormat = get_ue_golomb_long(gb); if (hvcc->chromaFormat == 3) skip_bits1(gb); // separate_colour_plane_flag get_ue_golomb_long(gb); // pic_width_in_luma_samples get_ue_golomb_long(gb); // pic_height_in_luma_samples if (get_bits1(gb)) { // conformance_window_flag get_ue_golomb_long(gb); // conf_win_left_offset get_ue_golomb_long(gb); // conf_win_right_offset get_ue_golomb_long(gb); // conf_win_top_offset get_ue_golomb_long(gb); // conf_win_bottom_offset } hvcc->bitDepthLumaMinus8 = get_ue_golomb_long(gb); hvcc->bitDepthChromaMinus8 = get_ue_golomb_long(gb); log2_max_pic_order_cnt_lsb_minus4 = get_ue_golomb_long(gb); /* sps_sub_layer_ordering_info_present_flag */ i = get_bits1(gb) ? 0 : sps_max_sub_layers_minus1; for (; i <= sps_max_sub_layers_minus1; i++) skip_sub_layer_ordering_info(gb); get_ue_golomb_long(gb); // log2_min_luma_coding_block_size_minus3 get_ue_golomb_long(gb); // log2_diff_max_min_luma_coding_block_size get_ue_golomb_long(gb); // log2_min_transform_block_size_minus2 get_ue_golomb_long(gb); // log2_diff_max_min_transform_block_size get_ue_golomb_long(gb); // max_transform_hierarchy_depth_inter get_ue_golomb_long(gb); // max_transform_hierarchy_depth_intra if (get_bits1(gb) && // scaling_list_enabled_flag get_bits1(gb)) // sps_scaling_list_data_present_flag skip_scaling_list_data(gb); skip_bits1(gb); // amp_enabled_flag skip_bits1(gb); // sample_adaptive_offset_enabled_flag if (get_bits1(gb)) { // pcm_enabled_flag skip_bits (gb, 4); // pcm_sample_bit_depth_luma_minus1 skip_bits (gb, 4); // pcm_sample_bit_depth_chroma_minus1 get_ue_golomb_long(gb); // log2_min_pcm_luma_coding_block_size_minus3 get_ue_golomb_long(gb); // log2_diff_max_min_pcm_luma_coding_block_size skip_bits1 (gb); // pcm_loop_filter_disabled_flag } num_short_term_ref_pic_sets = get_ue_golomb_long(gb); if (num_short_term_ref_pic_sets > HEVC_MAX_SHORT_TERM_REF_PIC_SETS) return AVERROR_INVALIDDATA; for (i = 0; i < num_short_term_ref_pic_sets; i++) { int ret = parse_rps(gb, i, num_short_term_ref_pic_sets, num_delta_pocs); if (ret < 0) return ret; } if (get_bits1(gb)) { // long_term_ref_pics_present_flag unsigned num_long_term_ref_pics_sps = get_ue_golomb_long(gb); if (num_long_term_ref_pics_sps > 31U) return AVERROR_INVALIDDATA; for (i = 0; i < num_long_term_ref_pics_sps; i++) { // num_long_term_ref_pics_sps int len = FFMIN(log2_max_pic_order_cnt_lsb_minus4 + 4, 16); skip_bits (gb, len); // lt_ref_pic_poc_lsb_sps[i] skip_bits1(gb); // used_by_curr_pic_lt_sps_flag[i] } } skip_bits1(gb); // sps_temporal_mvp_enabled_flag skip_bits1(gb); // strong_intra_smoothing_enabled_flag if (get_bits1(gb)) // vui_parameters_present_flag hvcc_parse_vui(gb, hvcc, sps_max_sub_layers_minus1); /* nothing useful for hvcC past this point */ return 0; } static int hvcc_parse_pps(GetBitContext *gb, HEVCDecoderConfigurationRecord *hvcc) { uint8_t tiles_enabled_flag, entropy_coding_sync_enabled_flag; get_ue_golomb_long(gb); // pps_pic_parameter_set_id get_ue_golomb_long(gb); // pps_seq_parameter_set_id /* * dependent_slice_segments_enabled_flag u(1) * output_flag_present_flag u(1) * num_extra_slice_header_bits u(3) * sign_data_hiding_enabled_flag u(1) * cabac_init_present_flag u(1) */ skip_bits(gb, 7); get_ue_golomb_long(gb); // num_ref_idx_l0_default_active_minus1 get_ue_golomb_long(gb); // num_ref_idx_l1_default_active_minus1 get_se_golomb_long(gb); // init_qp_minus26 /* * constrained_intra_pred_flag u(1) * transform_skip_enabled_flag u(1) */ skip_bits(gb, 2); if (get_bits1(gb)) // cu_qp_delta_enabled_flag get_ue_golomb_long(gb); // diff_cu_qp_delta_depth get_se_golomb_long(gb); // pps_cb_qp_offset get_se_golomb_long(gb); // pps_cr_qp_offset /* * pps_slice_chroma_qp_offsets_present_flag u(1) * weighted_pred_flag u(1) * weighted_bipred_flag u(1) * transquant_bypass_enabled_flag u(1) */ skip_bits(gb, 4); tiles_enabled_flag = get_bits1(gb); entropy_coding_sync_enabled_flag = get_bits1(gb); if (entropy_coding_sync_enabled_flag && tiles_enabled_flag) hvcc->parallelismType = 0; // mixed-type parallel decoding else if (entropy_coding_sync_enabled_flag) hvcc->parallelismType = 3; // wavefront-based parallel decoding else if (tiles_enabled_flag) hvcc->parallelismType = 2; // tile-based parallel decoding else hvcc->parallelismType = 1; // slice-based parallel decoding /* nothing useful for hvcC past this point */ return 0; } static void nal_unit_parse_header(GetBitContext *gb, uint8_t *nal_type) { skip_bits1(gb); // forbidden_zero_bit *nal_type = get_bits(gb, 6); /* * nuh_layer_id u(6) * nuh_temporal_id_plus1 u(3) */ skip_bits(gb, 9); } static int hvcc_array_add_nal_unit(uint8_t *nal_buf, uint32_t nal_size, uint8_t nal_type, int ps_array_completeness, HVCCNALUnitArray *array) { int ret; uint16_t numNalus = array->numNalus; ret = av_reallocp_array(&array->nalUnit, numNalus + 1, sizeof(uint8_t*)); if (ret < 0) return ret; ret = av_reallocp_array(&array->nalUnitLength, numNalus + 1, sizeof(uint16_t)); if (ret < 0) return ret; array->nalUnit [numNalus] = nal_buf; array->nalUnitLength[numNalus] = nal_size; array->NAL_unit_type = nal_type; array->numNalus++; /* * When the sample entry name is ‘hvc1’, the default and mandatory value of * array_completeness is 1 for arrays of all types of parameter sets, and 0 * for all other arrays. When the sample entry name is ‘hev1’, the default * value of array_completeness is 0 for all arrays. */ if (nal_type == HEVC_NAL_VPS || nal_type == HEVC_NAL_SPS || nal_type == HEVC_NAL_PPS) array->array_completeness = ps_array_completeness; return 0; } static int hvcc_add_nal_unit(uint8_t *nal_buf, uint32_t nal_size, int ps_array_completeness, HEVCDecoderConfigurationRecord *hvcc, unsigned array_idx) { int ret = 0; GetBitContext gbc; uint8_t nal_type; uint8_t *rbsp_buf; uint32_t rbsp_size; rbsp_buf = ff_nal_unit_extract_rbsp(nal_buf, nal_size, &rbsp_size, 2); if (!rbsp_buf) { ret = AVERROR(ENOMEM); goto end; } ret = init_get_bits8(&gbc, rbsp_buf, rbsp_size); if (ret < 0) goto end; nal_unit_parse_header(&gbc, &nal_type); /* * Note: only 'declarative' SEI messages are allowed in * hvcC. Perhaps the SEI playload type should be checked * and non-declarative SEI messages discarded? */ ret = hvcc_array_add_nal_unit(nal_buf, nal_size, nal_type, ps_array_completeness, &hvcc->arrays[array_idx]); if (ret < 0) goto end; if (hvcc->arrays[array_idx].numNalus == 1) hvcc->numOfArrays++; if (nal_type == HEVC_NAL_VPS) ret = hvcc_parse_vps(&gbc, hvcc); else if (nal_type == HEVC_NAL_SPS) ret = hvcc_parse_sps(&gbc, hvcc); else if (nal_type == HEVC_NAL_PPS) ret = hvcc_parse_pps(&gbc, hvcc); if (ret < 0) goto end; end: av_free(rbsp_buf); return ret; } static void hvcc_init(HEVCDecoderConfigurationRecord *hvcc) { memset(hvcc, 0, sizeof(HEVCDecoderConfigurationRecord)); hvcc->configurationVersion = 1; hvcc->lengthSizeMinusOne = 3; // 4 bytes /* * The following fields have all their valid bits set by default, * the ProfileTierLevel parsing code will unset them when needed. */ hvcc->general_profile_compatibility_flags = 0xffffffff; hvcc->general_constraint_indicator_flags = 0xffffffffffff; /* * Initialize this field with an invalid value which can be used to detect * whether we didn't see any VUI (in which case it should be reset to zero). */ hvcc->min_spatial_segmentation_idc = MAX_SPATIAL_SEGMENTATION + 1; } static void hvcc_close(HEVCDecoderConfigurationRecord *hvcc) { for (unsigned i = 0; i < FF_ARRAY_ELEMS(hvcc->arrays); i++) { HVCCNALUnitArray *const array = &hvcc->arrays[i]; array->numNalus = 0; av_freep(&array->nalUnit); av_freep(&array->nalUnitLength); } } static int hvcc_write(AVIOContext *pb, HEVCDecoderConfigurationRecord *hvcc) { uint16_t vps_count, sps_count, pps_count; /* * We only support writing HEVCDecoderConfigurationRecord version 1. */ hvcc->configurationVersion = 1; /* * If min_spatial_segmentation_idc is invalid, reset to 0 (unspecified). */ if (hvcc->min_spatial_segmentation_idc > MAX_SPATIAL_SEGMENTATION) hvcc->min_spatial_segmentation_idc = 0; /* * parallelismType indicates the type of parallelism that is used to meet * the restrictions imposed by min_spatial_segmentation_idc when the value * of min_spatial_segmentation_idc is greater than 0. */ if (!hvcc->min_spatial_segmentation_idc) hvcc->parallelismType = 0; /* * It's unclear how to properly compute these fields, so * let's always set them to values meaning 'unspecified'. */ hvcc->avgFrameRate = 0; hvcc->constantFrameRate = 0; av_log(NULL, AV_LOG_TRACE, "configurationVersion: %"PRIu8"\n", hvcc->configurationVersion); av_log(NULL, AV_LOG_TRACE, "general_profile_space: %"PRIu8"\n", hvcc->general_profile_space); av_log(NULL, AV_LOG_TRACE, "general_tier_flag: %"PRIu8"\n", hvcc->general_tier_flag); av_log(NULL, AV_LOG_TRACE, "general_profile_idc: %"PRIu8"\n", hvcc->general_profile_idc); av_log(NULL, AV_LOG_TRACE, "general_profile_compatibility_flags: 0x%08"PRIx32"\n", hvcc->general_profile_compatibility_flags); av_log(NULL, AV_LOG_TRACE, "general_constraint_indicator_flags: 0x%012"PRIx64"\n", hvcc->general_constraint_indicator_flags); av_log(NULL, AV_LOG_TRACE, "general_level_idc: %"PRIu8"\n", hvcc->general_level_idc); av_log(NULL, AV_LOG_TRACE, "min_spatial_segmentation_idc: %"PRIu16"\n", hvcc->min_spatial_segmentation_idc); av_log(NULL, AV_LOG_TRACE, "parallelismType: %"PRIu8"\n", hvcc->parallelismType); av_log(NULL, AV_LOG_TRACE, "chromaFormat: %"PRIu8"\n", hvcc->chromaFormat); av_log(NULL, AV_LOG_TRACE, "bitDepthLumaMinus8: %"PRIu8"\n", hvcc->bitDepthLumaMinus8); av_log(NULL, AV_LOG_TRACE, "bitDepthChromaMinus8: %"PRIu8"\n", hvcc->bitDepthChromaMinus8); av_log(NULL, AV_LOG_TRACE, "avgFrameRate: %"PRIu16"\n", hvcc->avgFrameRate); av_log(NULL, AV_LOG_TRACE, "constantFrameRate: %"PRIu8"\n", hvcc->constantFrameRate); av_log(NULL, AV_LOG_TRACE, "numTemporalLayers: %"PRIu8"\n", hvcc->numTemporalLayers); av_log(NULL, AV_LOG_TRACE, "temporalIdNested: %"PRIu8"\n", hvcc->temporalIdNested); av_log(NULL, AV_LOG_TRACE, "lengthSizeMinusOne: %"PRIu8"\n", hvcc->lengthSizeMinusOne); av_log(NULL, AV_LOG_TRACE, "numOfArrays: %"PRIu8"\n", hvcc->numOfArrays); for (unsigned i = 0, j = 0; i < FF_ARRAY_ELEMS(hvcc->arrays); i++) { const HVCCNALUnitArray *const array = &hvcc->arrays[i]; if (array->numNalus == 0) continue; av_log(NULL, AV_LOG_TRACE, "array_completeness[%u]: %"PRIu8"\n", j, array->array_completeness); av_log(NULL, AV_LOG_TRACE, "NAL_unit_type[%u]: %"PRIu8"\n", j, array->NAL_unit_type); av_log(NULL, AV_LOG_TRACE, "numNalus[%u]: %"PRIu16"\n", j, array->numNalus); for (unsigned k = 0; k < array->numNalus; k++) av_log(NULL, AV_LOG_TRACE, "nalUnitLength[%u][%u]: %"PRIu16"\n", j, k, array->nalUnitLength[k]); j++; } /* * We need at least one of each: VPS, SPS and PPS. */ vps_count = hvcc->arrays[VPS_INDEX].numNalus; sps_count = hvcc->arrays[SPS_INDEX].numNalus; pps_count = hvcc->arrays[PPS_INDEX].numNalus; if (!vps_count || vps_count > HEVC_MAX_VPS_COUNT || !sps_count || sps_count > HEVC_MAX_SPS_COUNT || !pps_count || pps_count > HEVC_MAX_PPS_COUNT) return AVERROR_INVALIDDATA; /* unsigned int(8) configurationVersion = 1; */ avio_w8(pb, hvcc->configurationVersion); /* * unsigned int(2) general_profile_space; * unsigned int(1) general_tier_flag; * unsigned int(5) general_profile_idc; */ avio_w8(pb, hvcc->general_profile_space << 6 | hvcc->general_tier_flag << 5 | hvcc->general_profile_idc); /* unsigned int(32) general_profile_compatibility_flags; */ avio_wb32(pb, hvcc->general_profile_compatibility_flags); /* unsigned int(48) general_constraint_indicator_flags; */ avio_wb32(pb, hvcc->general_constraint_indicator_flags >> 16); avio_wb16(pb, hvcc->general_constraint_indicator_flags); /* unsigned int(8) general_level_idc; */ avio_w8(pb, hvcc->general_level_idc); /* * bit(4) reserved = '1111'b; * unsigned int(12) min_spatial_segmentation_idc; */ avio_wb16(pb, hvcc->min_spatial_segmentation_idc | 0xf000); /* * bit(6) reserved = '111111'b; * unsigned int(2) parallelismType; */ avio_w8(pb, hvcc->parallelismType | 0xfc); /* * bit(6) reserved = '111111'b; * unsigned int(2) chromaFormat; */ avio_w8(pb, hvcc->chromaFormat | 0xfc); /* * bit(5) reserved = '11111'b; * unsigned int(3) bitDepthLumaMinus8; */ avio_w8(pb, hvcc->bitDepthLumaMinus8 | 0xf8); /* * bit(5) reserved = '11111'b; * unsigned int(3) bitDepthChromaMinus8; */ avio_w8(pb, hvcc->bitDepthChromaMinus8 | 0xf8); /* bit(16) avgFrameRate; */ avio_wb16(pb, hvcc->avgFrameRate); /* * bit(2) constantFrameRate; * bit(3) numTemporalLayers; * bit(1) temporalIdNested; * unsigned int(2) lengthSizeMinusOne; */ avio_w8(pb, hvcc->constantFrameRate << 6 | hvcc->numTemporalLayers << 3 | hvcc->temporalIdNested << 2 | hvcc->lengthSizeMinusOne); /* unsigned int(8) numOfArrays; */ avio_w8(pb, hvcc->numOfArrays); for (unsigned i = 0; i < FF_ARRAY_ELEMS(hvcc->arrays); i++) { const HVCCNALUnitArray *const array = &hvcc->arrays[i]; if (!array->numNalus) continue; /* * bit(1) array_completeness; * unsigned int(1) reserved = 0; * unsigned int(6) NAL_unit_type; */ avio_w8(pb, array->array_completeness << 7 | array->NAL_unit_type & 0x3f); /* unsigned int(16) numNalus; */ avio_wb16(pb, array->numNalus); for (unsigned j = 0; j < array->numNalus; j++) { /* unsigned int(16) nalUnitLength; */ avio_wb16(pb, array->nalUnitLength[j]); /* bit(8*nalUnitLength) nalUnit; */ avio_write(pb, array->nalUnit[j], array->nalUnitLength[j]); } } return 0; } int ff_hevc_annexb2mp4(AVIOContext *pb, const uint8_t *buf_in, int size, int filter_ps, int *ps_count) { int num_ps = 0, ret = 0; uint8_t *buf, *end, *start = NULL; if (!filter_ps) { ret = ff_avc_parse_nal_units(pb, buf_in, size); goto end; } ret = ff_avc_parse_nal_units_buf(buf_in, &start, &size); if (ret < 0) goto end; ret = 0; buf = start; end = start + size; while (end - buf > 4) { uint32_t len = FFMIN(AV_RB32(buf), end - buf - 4); uint8_t type = (buf[4] >> 1) & 0x3f; buf += 4; switch (type) { case HEVC_NAL_VPS: case HEVC_NAL_SPS: case HEVC_NAL_PPS: num_ps++; break; default: ret += 4 + len; avio_wb32(pb, len); avio_write(pb, buf, len); break; } buf += len; } end: av_free(start); if (ps_count) *ps_count = num_ps; return ret; } int ff_hevc_annexb2mp4_buf(const uint8_t *buf_in, uint8_t **buf_out, int *size, int filter_ps, int *ps_count) { AVIOContext *pb; int ret; ret = avio_open_dyn_buf(&pb); if (ret < 0) return ret; ret = ff_hevc_annexb2mp4(pb, buf_in, *size, filter_ps, ps_count); if (ret < 0) { ffio_free_dyn_buf(&pb); return ret; } *size = avio_close_dyn_buf(pb, buf_out); return 0; } int ff_isom_write_hvcc(AVIOContext *pb, const uint8_t *data, int size, int ps_array_completeness) { HEVCDecoderConfigurationRecord hvcc; uint8_t *buf, *end, *start; int ret; if (size < 6) { /* We can't write a valid hvcC from the provided data */ return AVERROR_INVALIDDATA; } else if (*data == 1) { /* Data is already hvcC-formatted */ avio_write(pb, data, size); return 0; } else if (!(AV_RB24(data) == 1 || AV_RB32(data) == 1)) { /* Not a valid Annex B start code prefix */ return AVERROR_INVALIDDATA; } ret = ff_avc_parse_nal_units_buf(data, &start, &size); if (ret < 0) return ret; hvcc_init(&hvcc); buf = start; end = start + size; while (end - buf > 4) { uint32_t len = FFMIN(AV_RB32(buf), end - buf - 4); uint8_t type = (buf[4] >> 1) & 0x3f; buf += 4; for (unsigned i = 0; i < FF_ARRAY_ELEMS(hvcc.arrays); i++) { static const uint8_t array_idx_to_type[] = { HEVC_NAL_VPS, HEVC_NAL_SPS, HEVC_NAL_PPS, HEVC_NAL_SEI_PREFIX, HEVC_NAL_SEI_SUFFIX }; if (type == array_idx_to_type[i]) { ret = hvcc_add_nal_unit(buf, len, ps_array_completeness, &hvcc, i); if (ret < 0) goto end; break; } } buf += len; } ret = hvcc_write(pb, &hvcc); end: hvcc_close(&hvcc); av_free(start); return ret; }