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2ba45a60 DM |
1 | /* |
2 | * FFM (ffserver live feed) common header | |
3 | * Copyright (c) 2001 Fabrice Bellard | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg 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 | * FFmpeg 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 FFmpeg; 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 { | |
40 | READ_HEADER, | |
41 | READ_DATA, | |
42 | }; | |
43 | ||
44 | typedef struct FFMContext { | |
45 | /* only reading mode */ | |
46 | int64_t write_index, file_size; | |
47 | int read_state; | |
48 | uint8_t header[FRAME_HEADER_SIZE+4]; | |
49 | ||
50 | /* read and write */ | |
51 | int first_packet; /* true if first packet, needed to set the discontinuity tag */ | |
52 | int packet_size; | |
53 | int frame_offset; | |
54 | int64_t dts; | |
55 | uint8_t *packet_ptr, *packet_end; | |
56 | uint8_t packet[FFM_PACKET_SIZE]; | |
57 | int64_t start_time; | |
58 | } FFMContext; | |
59 | ||
60 | #endif /* AVFORMAT_FFM_H */ |