libavfilter/af_volumedetect.c File Reference

#include "libavutil/audioconvert.h"
#include "libavutil/avassert.h"
#include "audio.h"
#include "avfilter.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	VolDetectContext
Defines
#define	MAX_DB   91
Functions
static int	query_formats (AVFilterContext *ctx)
static int	filter_samples (AVFilterLink *inlink, AVFilterBufferRef *samples)
static double	logdb (uint64_t v)
static void	print_stats (AVFilterContext *ctx)
static int	request_frame (AVFilterLink *outlink)
Variables
AVFilter	avfilter_af_volumedetect

---

Define Documentation

#define MAX_DB   91

Definition at line 76 of file af_volumedetect.c.

Referenced by logdb(), and print_stats().

---

Function Documentation

static int filter_samples	(	AVFilterLink *	inlink,
		AVFilterBufferRef *	samples
	)			[static]

Definition at line 52 of file af_volumedetect.c.

static double logdb

(

uint64_t

v

)

[inline, static]

Definition at line 78 of file af_volumedetect.c.

Referenced by print_stats().

static void print_stats

(

AVFilterContext *

ctx

)

[static]

Definition at line 86 of file af_volumedetect.c.

static int query_formats

(

AVFilterContext *

ctx

)

[static]

Definition at line 36 of file af_volumedetect.c.

static int request_frame

(

AVFilterLink *

outlink

)

[static]

Definition at line 129 of file af_volumedetect.c.

---

Variable Documentation

AVFilter avfilter_af_volumedetect

Initial value:

 {
    .name          = "volumedetect",
    .description   = NULL_IF_CONFIG_SMALL("Detect audio volume."),

    .priv_size     = sizeof(VolDetectContext),
    .query_formats = query_formats,

    .inputs    = (const AVFilterPad[]) {
        { .name             = "default",
          .type             = AVMEDIA_TYPE_AUDIO,
          .get_audio_buffer = ff_null_get_audio_buffer,
          .filter_samples   = filter_samples,
          .min_perms        = AV_PERM_READ, },
        { .name = NULL }
    },
    .outputs   = (const AVFilterPad[]) {
        { .name = "default",
          .type = AVMEDIA_TYPE_AUDIO,
          .request_frame = request_frame, },
        { .name = NULL }
    },
}

Definition at line 138 of file af_volumedetect.c.