libavformat/avio_internal.h

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/*
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVFORMAT_AVIO_INTERNAL_H
#define AVFORMAT_AVIO_INTERNAL_H

#include "avio.h"
#include "url.h"

#include "libavutil/log.h"

extern const AVClass ffio_url_class;

int ffio_init_context(AVIOContext *s,
                  unsigned char *buffer,
                  int buffer_size,
                  int write_flag,
                  void *opaque,
                  int (*read_packet)(void *opaque, uint8_t *buf, int buf_size),
                  int (*write_packet)(void *opaque, uint8_t *buf, int buf_size),
                  int64_t (*seek)(void *opaque, int64_t offset, int whence));


int ffio_read_partial(AVIOContext *s, unsigned char *buf, int size);

void ffio_fill(AVIOContext *s, int b, int count);

static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
{
    avio_wl32(pb, MKTAG(s[0], s[1], s[2], s[3]));
}

int ffio_rewind_with_probe_data(AVIOContext *s, unsigned char *buf, int buf_size);

uint64_t ffio_read_varlen(AVIOContext *bc);

int ffio_set_buf_size(AVIOContext *s, int buf_size);

int ffio_limit(AVIOContext *s, int size);

void ffio_init_checksum(AVIOContext *s,
                        unsigned long (*update_checksum)(unsigned long c, const uint8_t *p, unsigned int len),
                        unsigned long checksum);
unsigned long ffio_get_checksum(AVIOContext *s);
unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf,
                                    unsigned int len);

int ffio_open_dyn_packet_buf(AVIOContext **s, int max_packet_size);

int ffio_fdopen(AVIOContext **s, URLContext *h);

#endif /* AVFORMAT_AVIO_INTERNAL_H */

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