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 39enum { 40 READ_HEADER, 41 READ_DATA, 42}; 43 44typedef 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} FFMContext; 58 59int64_t ffm_read_write_index(int fd); 60int ffm_write_write_index(int fd, int64_t pos); 61void ffm_set_write_index(AVFormatContext *s, int64_t pos, int64_t file_size); 62 63#endif /* AVFORMAT_FFM_H */ 64