mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-18 03:19:31 +02:00
bf8bb94322
* qatar/master: ffmpeg: get rid of the -vglobal option. dct32: Add AVX implementation of 32-point DCT dct32: Change pass 6 permutation to allow for AVX implementation dct32: port SSE 32-point DCT to YASM multiple inclusion guard cleanup avio: document buffer must created with av_malloc() and friends avio: check AVIOContext malloc failure swscale: point out an alternative to sws_getContext svq3: Do initialization after parsing the extradata add changelog entries for 0.7_beta2 mp3lame: add #include required for AV_RB32 macro. Conflicts: Changelog libavcodec/svq3.c libavcodec/x86/dct32_sse.c libavfilter/vsrc_buffer.h Merged-by: Michael Niedermayer <michaelni@gmx.at>
102 lines
3.8 KiB
C
102 lines
3.8 KiB
C
/*
|
|
*
|
|
* 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"
|
|
|
|
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));
|
|
|
|
|
|
/**
|
|
* Read size bytes from AVIOContext into buf.
|
|
* This reads at most 1 packet. If that is not enough fewer bytes will be
|
|
* returned.
|
|
* @return number of bytes read or AVERROR
|
|
*/
|
|
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]));
|
|
}
|
|
|
|
/**
|
|
* Rewind the AVIOContext using the specified buffer containing the first buf_size bytes of the file.
|
|
* Used after probing to avoid seeking.
|
|
* Joins buf and s->buffer, taking any overlap into consideration.
|
|
* @note s->buffer must overlap with buf or they can't be joined and the function fails
|
|
*
|
|
* @param s The read-only AVIOContext to rewind
|
|
* @param buf The probe buffer containing the first buf_size bytes of the file
|
|
* @param buf_size The size of buf
|
|
* @return 0 in case of success, a negative value corresponding to an
|
|
* AVERROR code in case of failure
|
|
*/
|
|
int ffio_rewind_with_probe_data(AVIOContext *s, unsigned char *buf, int buf_size);
|
|
|
|
uint64_t ffio_read_varlen(AVIOContext *bc);
|
|
|
|
/** @warning must be called before any I/O */
|
|
int ffio_set_buf_size(AVIOContext *s, int buf_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);
|
|
|
|
/**
|
|
* Open a write only packetized memory stream with a maximum packet
|
|
* size of 'max_packet_size'. The stream is stored in a memory buffer
|
|
* with a big endian 4 byte header giving the packet size in bytes.
|
|
*
|
|
* @param s new IO context
|
|
* @param max_packet_size maximum packet size (must be > 0)
|
|
* @return zero if no error.
|
|
*/
|
|
int ffio_open_dyn_packet_buf(AVIOContext **s, int max_packet_size);
|
|
|
|
/**
|
|
* Create and initialize a AVIOContext for accessing the
|
|
* resource referenced by the URLContext h.
|
|
* @note When the URLContext h has been opened in read+write mode, the
|
|
* AVIOContext can be used only for writing.
|
|
*
|
|
* @param s Used to return the pointer to the created AVIOContext.
|
|
* In case of failure the pointed to value is set to NULL.
|
|
* @return 0 in case of success, a negative value corresponding to an
|
|
* AVERROR code in case of failure
|
|
*/
|
|
int ffio_fdopen(AVIOContext **s, URLContext *h);
|
|
|
|
#endif /* AVFORMAT_AVIO_INTERNAL_H */
|