64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
/*
|
|
* FFM (ffserver live feed) common header
|
|
* Copyright (c) 2001 Fabrice Bellard
|
|
*
|
|
* 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_FFM_H
|
|
#define AVFORMAT_FFM_H
|
|
|
|
#include <stdint.h>
|
|
#include "avformat.h"
|
|
#include "avio.h"
|
|
|
|
/* The FFM file is made of blocks of fixed size */
|
|
#define FFM_HEADER_SIZE 14
|
|
#define FFM_PACKET_SIZE 4096
|
|
#define PACKET_ID 0x666d
|
|
|
|
/* each packet contains frames (which can span several packets */
|
|
#define FRAME_HEADER_SIZE 16
|
|
#define FLAG_KEY_FRAME 0x01
|
|
#define FLAG_DTS 0x02
|
|
|
|
enum {
|
|
READ_HEADER,
|
|
READ_DATA,
|
|
};
|
|
|
|
typedef struct FFMContext {
|
|
/* only reading mode */
|
|
int64_t write_index, file_size;
|
|
int read_state;
|
|
uint8_t header[FRAME_HEADER_SIZE+4];
|
|
|
|
/* read and write */
|
|
int first_packet; /* true if first packet, needed to set the discontinuity tag */
|
|
int packet_size;
|
|
int frame_offset;
|
|
int64_t dts;
|
|
uint8_t *packet_ptr, *packet_end;
|
|
uint8_t packet[FFM_PACKET_SIZE];
|
|
} FFMContext;
|
|
|
|
int64_t ffm_read_write_index(int fd);
|
|
int ffm_write_write_index(int fd, int64_t pos);
|
|
void ffm_set_write_index(AVFormatContext *s, int64_t pos, int64_t file_size);
|
|
|
|
#endif /* AVFORMAT_FFM_H */
|