fifo.c File Reference

FIFO buffering filter. More...

#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/mathematics.h"
#include "libavutil/samplefmt.h"
#include "audio.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	Buf
struct	FifoContext

Functions
static av_cold int	init (AVFilterContext *ctx, const char *args)
static av_cold void	uninit (AVFilterContext *ctx)
static int	add_to_queue (AVFilterLink *inlink, AVFilterBufferRef *buf)
static void	queue_pop (FifoContext *s)
static void	buffer_offset (AVFilterLink *link, AVFilterBufferRef *buf, int offset)
	Move data pointers and pts offset samples forward.
static int	calc_ptr_alignment (AVFilterBufferRef *buf)
static int	return_audio_frame (AVFilterContext *ctx)
static int	request_frame (AVFilterLink *outlink)

Variables
static const AVFilterPad	avfilter_vf_fifo_inputs []
static const AVFilterPad	avfilter_vf_fifo_outputs []
AVFilter	avfilter_vf_fifo
static const AVFilterPad	avfilter_af_afifo_inputs []
static const AVFilterPad	avfilter_af_afifo_outputs []
AVFilter	avfilter_af_afifo

Detailed Description

FIFO buffering filter.

Definition in file fifo.c.

Function Documentation

static av_cold int init ( AVFilterContext *  ctx, const char *  args  )

static

Definition at line 54 of file fifo.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 62 of file fifo.c.

static int add_to_queue ( AVFilterLink *  inlink, AVFilterBufferRef *  buf  )

static

Definition at line 76 of file fifo.c.

static void queue_pop ( FifoContext *  s )

static

Definition at line 92 of file fifo.c.

Referenced by request_frame(), and return_audio_frame().

static void buffer_offset ( AVFilterLink *  link, AVFilterBufferRef *  buf, int  offset  )

static

Move data pointers and pts offset samples forward.

Definition at line 104 of file fifo.c.

Referenced by return_audio_frame().

static int calc_ptr_alignment ( AVFilterBufferRef *  buf )

static

Definition at line 129 of file fifo.c.

Referenced by return_audio_frame().

static int return_audio_frame ( AVFilterContext *  ctx )

static

Definition at line 146 of file fifo.c.

Referenced by request_frame().

static int request_frame ( AVFilterLink *  outlink )

static

Definition at line 225 of file fifo.c.

Variable Documentation

const AVFilterPad avfilter_vf_fifo_inputs[]

static

Initial value:

= {
    {
        .name             = "default",
        .type             = AVMEDIA_TYPE_VIDEO,
        .get_video_buffer = ff_null_get_video_buffer,
        .filter_frame     = add_to_queue,
        .min_perms        = AV_PERM_PRESERVE,
    },
    { NULL }
}

Definition at line 246 of file fifo.c.

const AVFilterPad avfilter_vf_fifo_outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_VIDEO,
        .request_frame = request_frame,
    },
    { NULL }
}

Definition at line 257 of file fifo.c.

AVFilter avfilter_vf_fifo

Initial value:

= {
    .name      = "fifo",
    .description = NULL_IF_CONFIG_SMALL("Buffer input images and send them when they are requested."),

    .init      = init,
    .uninit    = uninit,

    .priv_size = sizeof(FifoContext),

    .inputs    = avfilter_vf_fifo_inputs,
    .outputs   = avfilter_vf_fifo_outputs,
}

Definition at line 266 of file fifo.c.

const AVFilterPad avfilter_af_afifo_inputs[]

static

Initial value:

= {
    {
        .name             = "default",
        .type             = AVMEDIA_TYPE_AUDIO,
        .get_audio_buffer = ff_null_get_audio_buffer,
        .filter_frame     = add_to_queue,
        .min_perms        = AV_PERM_PRESERVE,
    },
    { NULL }
}

Definition at line 279 of file fifo.c.

const AVFilterPad avfilter_af_afifo_outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_AUDIO,
        .request_frame = request_frame,
    },
    { NULL }
}

Definition at line 290 of file fifo.c.

AVFilter avfilter_af_afifo

Initial value:

= {
    .name        = "afifo",
    .description = NULL_IF_CONFIG_SMALL("Buffer input frames and send them when they are requested."),

    .init      = init,
    .uninit    = uninit,

    .priv_size = sizeof(FifoContext),

    .inputs    = avfilter_af_afifo_inputs,
    .outputs   = avfilter_af_afifo_outputs,
}

Definition at line 299 of file fifo.c.