blob: c445f472f7362b6097ed4cec1541614212a2b7a4
| 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 | const AVClass *class; |
| 46 | /* only reading mode */ |
| 47 | int64_t write_index, file_size; |
| 48 | int read_state; |
| 49 | uint8_t header[FRAME_HEADER_SIZE+4]; |
| 50 | |
| 51 | /* read and write */ |
| 52 | int first_packet; /* true if first packet, needed to set the discontinuity tag */ |
| 53 | int packet_size; |
| 54 | int frame_offset; |
| 55 | int64_t dts; |
| 56 | uint8_t *packet_ptr, *packet_end; |
| 57 | uint8_t packet[FFM_PACKET_SIZE]; |
| 58 | int64_t start_time; |
| 59 | int server_attached; |
| 60 | } FFMContext; |
| 61 | |
| 62 | #endif /* AVFORMAT_FFM_H */ |
| 63 |