h264_ps.h

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/*
 * 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
 */

#ifndef AVCODEC_H264_PS_H
#define AVCODEC_H264_PS_H

#include <stdint.h>

#include "libavutil/buffer.h"
#include "libavutil/pixfmt.h"
#include "libavutil/rational.h"

#include "avcodec.h"
#include "get_bits.h"
#include "h264.h"

#define MAX_SPS_COUNT          32
#define MAX_PPS_COUNT         256
#define MAX_LOG2_MAX_FRAME_NUM    (12 + 4)

typedef struct SPS {
    unsigned int sps_id;
    int profile_idc;
    int level_idc;
    int chroma_format_idc;
    int transform_bypass;              
    int log2_max_frame_num;            
    int poc_type;                      
    int log2_max_poc_lsb;              
    int delta_pic_order_always_zero_flag;
    int offset_for_non_ref_pic;
    int offset_for_top_to_bottom_field;
    int poc_cycle_length;              
    int ref_frame_count;               
    int gaps_in_frame_num_allowed_flag;
    int mb_width;                      
    int mb_height;
    int frame_mbs_only_flag;
    int mb_aff;                        
    int direct_8x8_inference_flag;
    int crop;                          

    /* those 4 are already in luma samples */
    unsigned int crop_left;            
    unsigned int crop_right;           
    unsigned int crop_top;             
    unsigned int crop_bottom;          
    int vui_parameters_present_flag;
    AVRational sar;
    int video_signal_type_present_flag;
    int full_range;
    int colour_description_present_flag;
    enum AVColorPrimaries color_primaries;
    enum AVColorTransferCharacteristic color_trc;
    enum AVColorSpace colorspace;
    int timing_info_present_flag;
    uint32_t num_units_in_tick;
    uint32_t time_scale;
    int fixed_frame_rate_flag;
    short offset_for_ref_frame[256]; // FIXME dyn aloc?
    int bitstream_restriction_flag;
    int num_reorder_frames;
    int scaling_matrix_present;
    uint8_t scaling_matrix4[6][16];
    uint8_t scaling_matrix8[6][64];
    int nal_hrd_parameters_present_flag;
    int vcl_hrd_parameters_present_flag;
    int pic_struct_present_flag;
    int time_offset_length;
    int cpb_cnt;                          
    int initial_cpb_removal_delay_length; 
    int cpb_removal_delay_length;         
    int dpb_output_delay_length;          
    int bit_depth_luma;                   
    int bit_depth_chroma;                 
    int residual_color_transform_flag;    
    int constraint_set_flags;             
    uint8_t data[4096];
    size_t data_size;
} SPS;

typedef struct PPS {
    unsigned int sps_id;
    int cabac;                  
    int pic_order_present;      
    int slice_group_count;      
    int mb_slice_group_map_type;
    unsigned int ref_count[2];  
    int weighted_pred;          
    int weighted_bipred_idc;
    int init_qp;                
    int init_qs;                
    int chroma_qp_index_offset[2];
    int deblocking_filter_parameters_present; 
    int constrained_intra_pred;     
    int redundant_pic_cnt_present;  
    int transform_8x8_mode;         
    uint8_t scaling_matrix4[6][16];
    uint8_t scaling_matrix8[6][64];
    uint8_t chroma_qp_table[2][QP_MAX_NUM+1];  
    int chroma_qp_diff;
    uint8_t data[4096];
    size_t data_size;

    uint32_t dequant4_buffer[6][QP_MAX_NUM + 1][16];
    uint32_t dequant8_buffer[6][QP_MAX_NUM + 1][64];
    uint32_t(*dequant4_coeff[6])[16];
    uint32_t(*dequant8_coeff[6])[64];
} PPS;

typedef struct H264ParamSets {
    AVBufferRef *sps_list[MAX_SPS_COUNT];
    AVBufferRef *pps_list[MAX_PPS_COUNT];

    AVBufferRef *pps_ref;
    AVBufferRef *sps_ref;
    /* currently active parameters sets */
    const PPS *pps;
    const SPS *sps;
} H264ParamSets;

int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
                                     H264ParamSets *ps, int ignore_truncation);

int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
                                         H264ParamSets *ps, int bit_length);

void ff_h264_ps_uninit(H264ParamSets *ps);

#endif /* AVCODEC_H264_PS_H */