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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_SEI_H
#define AVCODEC_H264_SEI_H
#include "get_bits.h"
#include "h264_ps.h"
#include "sei.h"
/**
* 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;
/**
* frame_packing_arrangement types
*/
typedef enum {
H264_SEI_FPA_TYPE_CHECKERBOARD = 0,
H264_SEI_FPA_TYPE_INTERLEAVE_COLUMN = 1,
H264_SEI_FPA_TYPE_INTERLEAVE_ROW = 2,
H264_SEI_FPA_TYPE_SIDE_BY_SIDE = 3,
H264_SEI_FPA_TYPE_TOP_BOTTOM = 4,
H264_SEI_FPA_TYPE_INTERLEAVE_TEMPORAL = 5,
H264_SEI_FPA_TYPE_2D = 6,
} H264_SEI_FpaType;
typedef struct H264SEITimeCode {
/* When not continuously receiving full timecodes, we have to reference
the previous timecode received */
int full;
int frame;
int seconds;
int minutes;
int hours;
int dropframe;
} H264SEITimeCode;
typedef struct H264SEIPictureTiming {
// maximum size of pic_timing according to the spec should be 274 bits
uint8_t payload[40];
int payload_size_bits;
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;
/**
* Maximum three timecodes in a pic_timing SEI.
*/
H264SEITimeCode timecode[3];
/**
* Number of timecode in use
*/
int timecode_cnt;
} H264SEIPictureTiming;
typedef struct H264SEIAFD {
int present;
uint8_t active_format_description;
} H264SEIAFD;
typedef struct H264SEIA53Caption {
AVBufferRef *buf_ref;
} H264SEIA53Caption;
typedef struct H264SEIUnregistered {
int x264_build;
AVBufferRef **buf_ref;
int nb_buf_ref;
} 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_id;
int arrangement_cancel_flag; ///< is previous arrangement canceled, -1 if never received
H264_SEI_FpaType arrangement_type;
int arrangement_repetition_period;
int content_interpretation_type;
int quincunx_sampling_flag;
int current_frame_is_frame0_flag;
} H264SEIFramePacking;
typedef struct H264SEIDisplayOrientation {
int present;
int anticlockwise_rotation;
int hflip, vflip;
} H264SEIDisplayOrientation;
typedef struct H264SEIGreenMetaData {
uint8_t green_metadata_type;
uint8_t period_type;
uint16_t num_seconds;
uint16_t num_pictures;
uint8_t percent_non_zero_macroblocks;
uint8_t percent_intra_coded_macroblocks;
uint8_t percent_six_tap_filtering;
uint8_t percent_alpha_point_deblocking_instance;
uint8_t xsd_metric_type;
uint16_t xsd_metric_value;
} H264SEIGreenMetaData;
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;
H264SEIGreenMetaData green_metadata;
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);
/**
* Get stereo_mode string from the h264 frame_packing_arrangement
*/
const char *ff_h264_sei_stereo_mode(const H264SEIFramePacking *h);
/**
* Parse the contents of a picture timing message given an active SPS.
*/
int ff_h264_sei_process_picture_timing(H264SEIPictureTiming *h, const SPS *sps,
void *logctx);
#endif /* AVCODEC_H264_SEI_H */
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