64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
/*
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* FFM (avserver live feed) common header
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* Copyright (c) 2001 Fabrice Bellard
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVFORMAT_FFM_H
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#define AVFORMAT_FFM_H
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#include <stdint.h>
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#include "avformat.h"
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#include "avio.h"
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/* The FFM file is made of blocks of fixed size */
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#define FFM_HEADER_SIZE 14
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#define FFM_PACKET_SIZE 4096
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#define PACKET_ID 0x666d
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/* each packet contains frames (which can span several packets */
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#define FRAME_HEADER_SIZE 16
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#define FLAG_KEY_FRAME 0x01
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#define FLAG_DTS 0x02
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enum {
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READ_HEADER,
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READ_DATA,
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};
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typedef struct FFMContext {
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/* only reading mode */
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int64_t write_index, file_size;
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int read_state;
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uint8_t header[FRAME_HEADER_SIZE+4];
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/* read and write */
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int first_packet; /* true if first packet, needed to set the discontinuity tag */
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int packet_size;
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int frame_offset;
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int64_t dts;
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uint8_t *packet_ptr, *packet_end;
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uint8_t packet[FFM_PACKET_SIZE];
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} FFMContext;
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int64_t ffm_read_write_index(int fd);
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int ffm_write_write_index(int fd, int64_t pos);
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void ffm_set_write_index(AVFormatContext *s, int64_t pos, int64_t file_size);
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#endif /* AVFORMAT_FFM_H */
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