mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-14 19:25:01 +00:00
116 lines
3.9 KiB
C
116 lines
3.9 KiB
C
/*
|
|
* "NUT" Container Format (de)muxer
|
|
* Copyright (c) 2006 Michael Niedermayer
|
|
*
|
|
* 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 AVFORMAT_NUT_H
|
|
#define AVFORMAT_NUT_H
|
|
|
|
//#include <limits.h>
|
|
//#include "libavutil/adler32.h"
|
|
//#include "libavcodec/mpegaudio.h"
|
|
#include "avformat.h"
|
|
#include "riff.h"
|
|
|
|
#define MAIN_STARTCODE (0x7A561F5F04ADULL + (((uint64_t)('N'<<8) + 'M')<<48))
|
|
#define STREAM_STARTCODE (0x11405BF2F9DBULL + (((uint64_t)('N'<<8) + 'S')<<48))
|
|
#define SYNCPOINT_STARTCODE (0xE4ADEECA4569ULL + (((uint64_t)('N'<<8) + 'K')<<48))
|
|
#define INDEX_STARTCODE (0xDD672F23E64EULL + (((uint64_t)('N'<<8) + 'X')<<48))
|
|
#define INFO_STARTCODE (0xAB68B596BA78ULL + (((uint64_t)('N'<<8) + 'I')<<48))
|
|
|
|
#define ID_STRING "nut/multimedia container\0"
|
|
|
|
#define MAX_DISTANCE (1024*32-1)
|
|
|
|
typedef enum{
|
|
FLAG_KEY = 1, ///<if set, frame is keyframe
|
|
FLAG_EOR = 2, ///<if set, stream has no relevance on presentation. (EOR)
|
|
FLAG_CODED_PTS = 8, ///<if set, coded_pts is in the frame header
|
|
FLAG_STREAM_ID = 16, ///<if set, stream_id is coded in the frame header
|
|
FLAG_SIZE_MSB = 32, ///<if set, data_size_msb is at frame header, otherwise data_size_msb is 0
|
|
FLAG_CHECKSUM = 64, ///<if set, the frame header contains a checksum
|
|
FLAG_RESERVED = 128, ///<if set, reserved_count is coded in the frame header
|
|
FLAG_HEADER_IDX =1024, ///<If set, header_idx is coded in the frame header.
|
|
FLAG_MATCH_TIME =2048, ///<If set, match_time_delta is coded in the frame header
|
|
FLAG_CODED =4096, ///<if set, coded_flags are stored in the frame header
|
|
FLAG_INVALID =8192, ///<if set, frame_code is invalid
|
|
} Flag;
|
|
|
|
typedef struct {
|
|
uint64_t pos;
|
|
uint64_t back_ptr;
|
|
// uint64_t global_key_pts;
|
|
int64_t ts;
|
|
} Syncpoint;
|
|
|
|
typedef struct {
|
|
uint16_t flags;
|
|
uint8_t stream_id;
|
|
uint16_t size_mul;
|
|
uint16_t size_lsb;
|
|
int16_t pts_delta;
|
|
uint8_t reserved_count;
|
|
uint8_t header_idx;
|
|
} FrameCode;
|
|
|
|
typedef struct {
|
|
int last_flags;
|
|
int skip_until_key_frame;
|
|
int64_t last_pts;
|
|
int time_base_id;
|
|
AVRational *time_base;
|
|
int msb_pts_shift;
|
|
int max_pts_distance;
|
|
int decode_delay; //FIXME duplicate of has_b_frames
|
|
} StreamContext;
|
|
|
|
typedef struct {
|
|
AVFormatContext *avf;
|
|
// int written_packet_size;
|
|
// int64_t packet_start;
|
|
FrameCode frame_code[256];
|
|
uint8_t header_len[128];
|
|
const uint8_t *header[128];
|
|
uint64_t next_startcode; ///< stores the next startcode if it has already been parsed but the stream is not seekable
|
|
StreamContext *stream;
|
|
unsigned int max_distance;
|
|
unsigned int time_base_count;
|
|
int64_t last_syncpoint_pos;
|
|
int header_count;
|
|
AVRational *time_base;
|
|
struct AVTreeNode *syncpoints;
|
|
} NUTContext;
|
|
|
|
extern const AVCodecTag ff_nut_subtitle_tags[];
|
|
|
|
typedef struct {
|
|
char str[9];
|
|
int flag;
|
|
} Dispositions;
|
|
|
|
void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val);
|
|
int64_t ff_lsb2full(StreamContext *stream, int64_t lsb);
|
|
int ff_nut_sp_pos_cmp(Syncpoint *a, Syncpoint *b);
|
|
int ff_nut_sp_pts_cmp(Syncpoint *a, Syncpoint *b);
|
|
void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts);
|
|
|
|
extern const Dispositions ff_nut_dispositions[];
|
|
|
|
#endif /* AVFORMAT_NUT_H */
|