libavutil/fifo.c File Reference

#include "common.h"
#include "fifo.h"

Go to the source code of this file.

Functions

AVFifoBufferav_fifo_alloc (unsigned int size)
 Initialize an AVFifoBuffer.
void av_fifo_free (AVFifoBuffer *f)
 Free an AVFifoBuffer.
void av_fifo_reset (AVFifoBuffer *f)
 Reset the AVFifoBuffer to the state right after av_fifo_alloc, in particular it is emptied.
int av_fifo_size (AVFifoBuffer *f)
 Return the amount of data in bytes in the AVFifoBuffer, that is the amount of data you can read from it.
int av_fifo_space (AVFifoBuffer *f)
 Return the amount of space in bytes in the AVFifoBuffer, that is the amount of data you can write into it.
int av_fifo_realloc2 (AVFifoBuffer *f, unsigned int new_size)
 Resize an AVFifoBuffer.
int av_fifo_grow (AVFifoBuffer *f, unsigned int size)
 Enlarge an AVFifoBuffer.
int av_fifo_generic_write (AVFifoBuffer *f, void *src, int size, int(*func)(void *, void *, int))
 Feed data from a user-supplied callback to an AVFifoBuffer.
int av_fifo_generic_read (AVFifoBuffer *f, void *dest, int buf_size, void(*func)(void *, void *, int))
 Feed data from an AVFifoBuffer to a user-supplied callback.
void av_fifo_drain (AVFifoBuffer *f, int size)
 Discard data from the FIFO.


Function Documentation

AVFifoBuffer* av_fifo_alloc ( unsigned int  size  ) 

Initialize an AVFifoBuffer.

Parameters:
size of FIFO
Returns:
AVFifoBuffer or NULL in case of memory allocation failure

Definition at line 25 of file fifo.c.

Referenced by av_audio_fifo_alloc(), av_fifo_realloc2(), common_init(), dv_init_mux(), ff_audio_interleave_init(), flac_parse_init(), init(), init_audio(), init_video(), mpeg_mux_init(), oggvorbis_encode_init(), start_jack(), swf_write_header(), and udp_open().

void av_fifo_drain ( AVFifoBuffer f,
int  size 
)

Discard data from the FIFO.

Read and discard the specified amount of data from an AVFifoBuffer.

Definition at line 142 of file fifo.c.

Referenced by av_audio_fifo_drain(), av_fifo_generic_read(), dv_assemble_frame(), flac_parse(), and udp_read().

void av_fifo_free ( AVFifoBuffer f  ) 

int av_fifo_generic_read ( AVFifoBuffer f,
void *  dest,
int  buf_size,
void(*)(void *, void *, int)  func 
)

Feed data from an AVFifoBuffer to a user-supplied callback.

Parameters:
f AVFifoBuffer to read from
buf_size number of bytes to read
func generic read function
dest data destination

Definition at line 124 of file fifo.c.

Referenced by audio_read_packet(), av_audio_fifo_read(), av_buffersink_get_buffer_ref(), av_buffersink_read(), av_fifo_realloc2(), common_uninit(), end_frame(), ff_interleave_new_audio_packet(), flush_fifo(), flush_packet(), free_pkt_fifo(), oggvorbis_encode_frame(), process_callback(), request_frame(), swf_write_video(), udp_read(), and uninit().

int av_fifo_generic_write ( AVFifoBuffer f,
void *  src,
int  size,
int(*)(void *, void *, int)  func 
)

Feed data from a user-supplied callback to an AVFifoBuffer.

Parameters:
f AVFifoBuffer to write to
src data source; non-const since it may be used as a modifiable context by the function defined in func
size number of bytes to write
func generic write function; the first parameter is src, the second is dest_buf, the third is dest_buf_size. func must return the number of bytes written to dest_buf, or <= 0 to indicate no more data available to write. If func is NULL, src is interpreted as a simple byte array for source data.
Returns:
the number of bytes written to the FIFO

Definition at line 96 of file fifo.c.

Referenced by av_audio_fifo_write(), av_buffersrc_add_ref(), dv_assemble_frame(), end_frame(), ff_audio_rechunk_interleave(), flac_parse(), mpeg_mux_write_packet(), oggvorbis_encode_frame(), process_callback(), start_frame(), supply_new_packets(), swf_write_audio(), write_buf(), and write_to_fifo().

int av_fifo_grow ( AVFifoBuffer f,
unsigned int  additional_space 
)

Enlarge an AVFifoBuffer.

In case of reallocation failure, the old FIFO is kept unchanged. The new fifo size may be larger than the requested size.

Parameters:
f AVFifoBuffer to resize
additional_space the amount of space in bytes to allocate in addition to av_fifo_size()
Returns:
<0 for failure, >=0 otherwise

Definition at line 82 of file fifo.c.

int av_fifo_realloc2 ( AVFifoBuffer f,
unsigned int  size 
)

Resize an AVFifoBuffer.

In case of reallocation failure, the old FIFO is kept unchanged.

Parameters:
f AVFifoBuffer to resize
size new AVFifoBuffer size in bytes
Returns:
<0 for failure, >=0 otherwise

Definition at line 62 of file fifo.c.

Referenced by av_audio_fifo_realloc(), av_buffersrc_add_ref(), av_fifo_grow(), end_frame(), ff_audio_rechunk_interleave(), flac_parse(), mpeg_mux_write_packet(), write_buf(), and write_to_fifo().

void av_fifo_reset ( AVFifoBuffer f  ) 

Reset the AVFifoBuffer to the state right after av_fifo_alloc, in particular it is emptied.

Parameters:
f AVFifoBuffer to reset

Definition at line 46 of file fifo.c.

Referenced by av_audio_fifo_reset(), and av_fifo_alloc().

int av_fifo_size ( AVFifoBuffer f  ) 

int av_fifo_space ( AVFifoBuffer f  ) 

Return the amount of space in bytes in the AVFifoBuffer, that is the amount of data you can write into it.

Parameters:
f AVFifoBuffer to write into
Returns:
size

Definition at line 57 of file fifo.c.

Referenced by av_buffersrc_add_ref(), end_frame(), flac_parse(), oggvorbis_encode_frame(), poll_frame(), process_callback(), start_frame(), supply_new_packets(), write_buf(), and write_to_fifo().


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