00001 /* 00002 * FFM (ffserver live feed) common header 00003 * Copyright (c) 2001 Fabrice Bellard 00004 * 00005 * This file is part of FFmpeg. 00006 * 00007 * FFmpeg is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * FFmpeg is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with FFmpeg; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00022 #ifndef AVFORMAT_FFM_H 00023 #define AVFORMAT_FFM_H 00024 00025 #include <stdint.h> 00026 #include "avformat.h" 00027 #include "avio.h" 00028 00029 /* The FFM file is made of blocks of fixed size */ 00030 #define FFM_HEADER_SIZE 14 00031 #define FFM_PACKET_SIZE 4096 00032 #define PACKET_ID 0x666d 00033 00034 /* each packet contains frames (which can span several packets */ 00035 #define FRAME_HEADER_SIZE 16 00036 #define FLAG_KEY_FRAME 0x01 00037 #define FLAG_DTS 0x02 00038 00039 enum { 00040 READ_HEADER, 00041 READ_DATA, 00042 }; 00043 00044 typedef struct FFMContext { 00045 /* only reading mode */ 00046 int64_t write_index, file_size; 00047 int read_state; 00048 uint8_t header[FRAME_HEADER_SIZE+4]; 00049 00050 /* read and write */ 00051 int first_packet; /* true if first packet, needed to set the discontinuity tag */ 00052 int packet_size; 00053 int frame_offset; 00054 int64_t dts; 00055 uint8_t *packet_ptr, *packet_end; 00056 uint8_t packet[FFM_PACKET_SIZE]; 00057 } FFMContext; 00058 00059 int64_t ffm_read_write_index(int fd); 00060 int ffm_write_write_index(int fd, int64_t pos); 00061 void ffm_set_write_index(AVFormatContext *s, int64_t pos, int64_t file_size); 00062 00063 #endif /* AVFORMAT_FFM_H */
1.5.8