75 lines
2.7 KiB
C
75 lines
2.7 KiB
C
/*
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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_AVIO_INTERNAL_H
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#define AVFORMAT_AVIO_INTERNAL_H
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#include "avio.h"
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int ffio_init_context(AVIOContext *s,
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unsigned char *buffer,
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int buffer_size,
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int write_flag,
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void *opaque,
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int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
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int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
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int64_t (*seek)(void *opaque, int64_t offset, int whence));
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/**
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* Read size bytes from AVIOContext into buf.
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* This reads at most 1 packet. If that is not enough fewer bytes will be
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* returned.
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* @return number of bytes read or AVERROR
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*/
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int ffio_read_partial(AVIOContext *s, unsigned char *buf, int size);
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void ffio_fill(AVIOContext *s, int b, int count);
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static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
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{
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avio_wl32(pb, MKTAG(s[0], s[1], s[2], s[3]));
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}
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/**
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* Rewind the AVIOContext using the specified buffer containing the first buf_size bytes of the file.
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* Used after probing to avoid seeking.
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* Joins buf and s->buffer, taking any overlap into consideration.
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* @note s->buffer must overlap with buf or they can't be joined and the function fails
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*
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* @param s The read-only AVIOContext to rewind
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* @param buf The probe buffer containing the first buf_size bytes of the file
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* @param buf_size The size of buf
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* @return 0 in case of success, a negative value corresponding to an
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* AVERROR code in case of failure
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*/
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int ffio_rewind_with_probe_data(AVIOContext *s, unsigned char *buf, int buf_size);
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uint64_t ffio_read_varlen(AVIOContext *bc);
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/** @warning must be called before any I/O */
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int ffio_set_buf_size(AVIOContext *s, int buf_size);
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int ffio_read_pause(AVIOContext *h, int pause);
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int64_t ffio_read_seek (AVIOContext *h, int stream_index,
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int64_t timestamp, int flags);
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#endif // AVFORMAT_AVIO_INTERNAL_H
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