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/*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_H264_SEI_H
#define AVCODEC_H264_SEI_H
#include "get_bits.h"
/**
* SEI message types
*/
typedef enum {
H264_SEI_TYPE_BUFFERING_PERIOD = 0, ///< buffering period (H.264, D.1.1)
H264_SEI_TYPE_PIC_TIMING = 1, ///< picture timing
H264_SEI_TYPE_FILLER_PAYLOAD = 3, ///< filler data
H264_SEI_TYPE_USER_DATA_REGISTERED = 4, ///< registered user data as specified by Rec. ITU-T T.35
H264_SEI_TYPE_USER_DATA_UNREGISTERED = 5, ///< unregistered user data
H264_SEI_TYPE_RECOVERY_POINT = 6, ///< recovery point (frame # to decoder sync)
H264_SEI_TYPE_FRAME_PACKING = 45, ///< frame packing arrangement
H264_SEI_TYPE_DISPLAY_ORIENTATION = 47, ///< display orientation
H264_SEI_TYPE_ALTERNATIVE_TRANSFER = 147, ///< alternative transfer
} H264_SEI_Type;
/**
* pic_struct in picture timing SEI message
*/
typedef enum {
H264_SEI_PIC_STRUCT_FRAME = 0, ///< 0: %frame
H264_SEI_PIC_STRUCT_TOP_FIELD = 1, ///< 1: top field
H264_SEI_PIC_STRUCT_BOTTOM_FIELD = 2, ///< 2: bottom field
H264_SEI_PIC_STRUCT_TOP_BOTTOM = 3, ///< 3: top field, bottom field, in that order
H264_SEI_PIC_STRUCT_BOTTOM_TOP = 4, ///< 4: bottom field, top field, in that order
H264_SEI_PIC_STRUCT_TOP_BOTTOM_TOP = 5, ///< 5: top field, bottom field, top field repeated, in that order
H264_SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM = 6, ///< 6: bottom field, top field, bottom field repeated, in that order
H264_SEI_PIC_STRUCT_FRAME_DOUBLING = 7, ///< 7: %frame doubling
H264_SEI_PIC_STRUCT_FRAME_TRIPLING = 8 ///< 8: %frame tripling
} H264_SEI_PicStructType;
typedef struct H264SEIPictureTiming {
int present;
H264_SEI_PicStructType pic_struct;
/**
* Bit set of clock types for fields/frames in picture timing SEI message.
* For each found ct_type, appropriate bit is set (e.g., bit 1 for
* interlaced).
*/
int ct_type;
/**
* dpb_output_delay in picture timing SEI message, see H.264 C.2.2
*/
int dpb_output_delay;
/**
* cpb_removal_delay in picture timing SEI message, see H.264 C.1.2
*/
int cpb_removal_delay;
} H264SEIPictureTiming;
typedef struct H264SEIAFD {
int present;
uint8_t active_format_description;
} H264SEIAFD;
typedef struct H264SEIA53Caption {
int a53_caption_size;
uint8_t *a53_caption;
} H264SEIA53Caption;
typedef struct H264SEIUnregistered {
int x264_build;
} H264SEIUnregistered;
typedef struct H264SEIRecoveryPoint {
/**
* recovery_frame_cnt
*
* Set to -1 if no recovery point SEI message found or to number of frames
* before playback synchronizes. Frames having recovery point are key
* frames.
*/
int recovery_frame_cnt;
} H264SEIRecoveryPoint;
typedef struct H264SEIBufferingPeriod {
int present; ///< Buffering period SEI flag
int initial_cpb_removal_delay[32]; ///< Initial timestamps for CPBs
} H264SEIBufferingPeriod;
typedef struct H264SEIFramePacking {
int present;
int arrangement_type;
int content_interpretation_type;
int quincunx_subsampling;
} H264SEIFramePacking;
typedef struct H264SEIDisplayOrientation {
int present;
int anticlockwise_rotation;
int hflip, vflip;
} H264SEIDisplayOrientation;
typedef struct H264SEIAlternativeTransfer {
int present;
int preferred_transfer_characteristics;
} H264SEIAlternativeTransfer;
typedef struct H264SEIContext {
H264SEIPictureTiming picture_timing;
H264SEIAFD afd;
H264SEIA53Caption a53_caption;
H264SEIUnregistered unregistered;
H264SEIRecoveryPoint recovery_point;
H264SEIBufferingPeriod buffering_period;
H264SEIFramePacking frame_packing;
H264SEIDisplayOrientation display_orientation;
H264SEIAlternativeTransfer alternative_transfer;
} H264SEIContext;
struct H264ParamSets;
int ff_h264_sei_decode(H264SEIContext *h, GetBitContext *gb,
const struct H264ParamSets *ps, void *logctx);
/**
* Reset SEI values at the beginning of the frame.
*/
void ff_h264_sei_uninit(H264SEIContext *h);
#endif /* AVCODEC_H264_SEI_H */
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