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The ///< or /**< form of doxygen comments are only to be used when the documentation follows the member and the comment block starts on the same line as the member. This commit fixes wrong uses of them; in particular, this fixes the comment for mb_height in H.264 SPS's structure which was wrongly added to mb_width. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
178 lines
6.4 KiB
C
178 lines
6.4 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* H.264 parameter set handling
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*/
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#ifndef AVCODEC_H264_PS_H
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#define AVCODEC_H264_PS_H
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#include <stdint.h>
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#include "libavutil/pixfmt.h"
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#include "libavutil/rational.h"
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#include "avcodec.h"
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#include "get_bits.h"
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#include "h264.h"
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#include "h2645_vui.h"
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#define MAX_SPS_COUNT 32
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#define MAX_PPS_COUNT 256
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#define MAX_LOG2_MAX_FRAME_NUM (12 + 4)
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/**
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* Sequence parameter set
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*/
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typedef struct SPS {
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unsigned int sps_id;
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int profile_idc;
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int level_idc;
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int chroma_format_idc;
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int transform_bypass; ///< qpprime_y_zero_transform_bypass_flag
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int log2_max_frame_num; ///< log2_max_frame_num_minus4 + 4
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int poc_type; ///< pic_order_cnt_type
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int log2_max_poc_lsb; ///< log2_max_pic_order_cnt_lsb_minus4
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int delta_pic_order_always_zero_flag;
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int offset_for_non_ref_pic;
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int offset_for_top_to_bottom_field;
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int poc_cycle_length; ///< num_ref_frames_in_pic_order_cnt_cycle
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int ref_frame_count; ///< num_ref_frames
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int gaps_in_frame_num_allowed_flag;
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int mb_width; ///< pic_width_in_mbs_minus1 + 1
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/// (pic_height_in_map_units_minus1 + 1) * (2 - frame_mbs_only_flag)
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int mb_height;
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int frame_mbs_only_flag;
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int mb_aff; ///< mb_adaptive_frame_field_flag
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int direct_8x8_inference_flag;
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int crop; ///< frame_cropping_flag
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/* those 4 are already in luma samples */
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unsigned int crop_left; ///< frame_cropping_rect_left_offset
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unsigned int crop_right; ///< frame_cropping_rect_right_offset
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unsigned int crop_top; ///< frame_cropping_rect_top_offset
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unsigned int crop_bottom; ///< frame_cropping_rect_bottom_offset
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int vui_parameters_present_flag;
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H2645VUI vui;
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int timing_info_present_flag;
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uint32_t num_units_in_tick;
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uint32_t time_scale;
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int fixed_frame_rate_flag;
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int32_t offset_for_ref_frame[256];
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int bitstream_restriction_flag;
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int num_reorder_frames;
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int max_dec_frame_buffering;
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int scaling_matrix_present;
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uint16_t scaling_matrix_present_mask;
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uint8_t scaling_matrix4[6][16];
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uint8_t scaling_matrix8[6][64];
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int nal_hrd_parameters_present_flag;
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int vcl_hrd_parameters_present_flag;
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int pic_struct_present_flag;
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int time_offset_length;
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int cpb_cnt; ///< See H.264 E.1.2
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int bit_rate_scale;
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uint32_t bit_rate_value[32]; ///< bit_rate_value_minus1 + 1
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uint32_t cpb_size_value[32]; ///< cpb_size_value_minus1 + 1
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uint32_t cpr_flag;
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int initial_cpb_removal_delay_length; ///< initial_cpb_removal_delay_length_minus1 + 1
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int cpb_removal_delay_length; ///< cpb_removal_delay_length_minus1 + 1
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int dpb_output_delay_length; ///< dpb_output_delay_length_minus1 + 1
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int bit_depth_luma; ///< bit_depth_luma_minus8 + 8
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int bit_depth_chroma; ///< bit_depth_chroma_minus8 + 8
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int residual_color_transform_flag; ///< residual_colour_transform_flag
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int constraint_set_flags; ///< constraint_set[0-3]_flag
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uint8_t data[4096];
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size_t data_size;
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} SPS;
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/**
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* Picture parameter set
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*/
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typedef struct PPS {
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unsigned int pps_id;
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unsigned int sps_id;
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int cabac; ///< entropy_coding_mode_flag
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int pic_order_present; ///< bottom_field_pic_order_in_frame_present_flag
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int slice_group_count; ///< num_slice_groups_minus1 + 1
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int mb_slice_group_map_type;
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unsigned int ref_count[2]; ///< num_ref_idx_l0/1_active_minus1 + 1
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int weighted_pred; ///< weighted_pred_flag
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int weighted_bipred_idc;
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int init_qp; ///< pic_init_qp_minus26 + 26
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int init_qs; ///< pic_init_qs_minus26 + 26
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int chroma_qp_index_offset[2];
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int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag
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int constrained_intra_pred; ///< constrained_intra_pred_flag
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int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag
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int transform_8x8_mode; ///< transform_8x8_mode_flag
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int pic_scaling_matrix_present_flag;
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uint16_t pic_scaling_matrix_present_mask;
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uint8_t scaling_matrix4[6][16];
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uint8_t scaling_matrix8[6][64];
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uint8_t chroma_qp_table[2][QP_MAX_NUM+1]; ///< pre-scaled (with chroma_qp_index_offset) version of qp_table
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int chroma_qp_diff;
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uint8_t data[4096];
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size_t data_size;
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uint32_t dequant4_buffer[6][QP_MAX_NUM + 1][16];
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uint32_t dequant8_buffer[6][QP_MAX_NUM + 1][64];
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uint32_t(*dequant4_coeff[6])[16];
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uint32_t(*dequant8_coeff[6])[64];
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const SPS *sps; ///< RefStruct reference
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} PPS;
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typedef struct H264ParamSets {
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const SPS *sps_list[MAX_SPS_COUNT]; ///< RefStruct references
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const PPS *pps_list[MAX_PPS_COUNT]; ///< RefStruct references
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/* currently active parameters sets */
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const PPS *pps; ///< RefStruct reference
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const SPS *sps; ///< ordinary pointer, no RefStruct reference
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int overread_warning_printed[2];
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} H264ParamSets;
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/**
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* compute profile from sps
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*/
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int ff_h264_get_profile(const SPS *sps);
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/**
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* Decode SPS
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*/
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int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
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H264ParamSets *ps, int ignore_truncation);
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/**
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* Decode PPS
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*/
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int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
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H264ParamSets *ps, int bit_length);
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/**
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* Uninit H264 param sets structure.
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*/
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void ff_h264_ps_uninit(H264ParamSets *ps);
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#endif /* AVCODEC_H264_PS_H */
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