libavfilter/af_volume.c File Reference

audio volume filter based on ffmpeg.c code More...

#include "libavutil/audioconvert.h"
#include "libavutil/eval.h"
#include "audio.h"
#include "avfilter.h"
#include "formats.h"

Go to the source code of this file.

Data Structures
struct	VolumeContext
Functions
static av_cold int	init (AVFilterContext *ctx, const char *args, void *opaque)
static int	query_formats (AVFilterContext *ctx)
static void	filter_samples (AVFilterLink *inlink, AVFilterBufferRef *insamples)
Variables
AVFilter	avfilter_af_volume

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Detailed Description

audio volume filter based on ffmpeg.c code

Definition in file af_volume.c.

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Function Documentation

static void filter_samples	(	AVFilterLink *	inlink,
		AVFilterBufferRef *	insamples
	)			[static]

Definition at line 113 of file af_volume.c.

static av_cold int init	(	AVFilterContext *	ctx,
		const char *	args,
		void *	opaque
	)			[static]

Definition at line 38 of file af_volume.c.

static int query_formats

(

AVFilterContext *

ctx

)

[static]

Definition at line 82 of file af_volume.c.

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Variable Documentation

AVFilter avfilter_af_volume

Initial value:

 {
    .name           = "volume",
    .description    = NULL_IF_CONFIG_SMALL("Change input volume."),
    .query_formats  = query_formats,
    .priv_size      = sizeof(VolumeContext),
    .init           = init,

    .inputs  = (const AVFilterPad[])  {{ .name     = "default",
                                   .type           = AVMEDIA_TYPE_AUDIO,
                                   .filter_samples = filter_samples,
                                   .min_perms      = AV_PERM_READ|AV_PERM_WRITE},
                                 { .name = NULL}},

    .outputs = (const AVFilterPad[])  {{ .name     = "default",
                                   .type           = AVMEDIA_TYPE_AUDIO, },
                                 { .name = NULL}},
}

Definition at line 175 of file af_volume.c.