ffm.h
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1 /*
2  * FFM (avserver live feed) common header
3  * Copyright (c) 2001 Fabrice Bellard
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #ifndef AVFORMAT_FFM_H
23 #define AVFORMAT_FFM_H
24 
25 #include <stdint.h>
26 #include "avformat.h"
27 #include "avio.h"
28 
29 /* The FFM file is made of blocks of fixed size */
30 #define FFM_HEADER_SIZE 14
31 #define FFM_PACKET_SIZE 4096
32 #define PACKET_ID 0x666d
33 
34 /* each packet contains frames (which can span several packets */
35 #define FRAME_HEADER_SIZE 16
36 #define FLAG_KEY_FRAME 0x01
37 #define FLAG_DTS 0x02
38 
39 enum {
42 };
43 
44 typedef struct FFMContext {
45  /* only reading mode */
49 
50  /* read and write */
51  int first_packet; /* true if first packet, needed to set the discontinuity tag */
54  int64_t dts;
55  uint8_t *packet_ptr, *packet_end;
57 } FFMContext;
58 
59 int64_t ffm_read_write_index(int fd);
60 int ffm_write_write_index(int fd, int64_t pos);
61 void ffm_set_write_index(AVFormatContext *s, int64_t pos, int64_t file_size);
62 
63 #endif /* AVFORMAT_FFM_H */