#include <gst/gst.h>
#include <gst/base/gstbasetransform.h>
#include <gst/audio/audio.h>
#include <gst/audio/gstaudiofilter.h>
#include "audioamplify.h"

Include dependency graph for audioamplify.c:

Macros
#define	GST_CAT_DEFAULT gst_audio_amplify_debug

#define	GST_TYPE_AUDIO_AMPLIFY_CLIPPING_METHOD (gst_audio_amplify_clipping_method_get_type ())

#define	ALLOWED_CAPS

#define	MIN_gint8 G_MININT8

#define	MAX_gint8 G_MAXINT8

#define	MIN_gint16 G_MININT16

#define	MAX_gint16 G_MAXINT16

#define	MIN_gint32 G_MININT32

#define	MAX_gint32 G_MAXINT32

#define	MAKE_INT_FUNCS(type, largetype)

#define	MAKE_FLOAT_FUNCS(type)

Enumerations
enum	{ LAST_SIGNAL }

enum	{ PROP_0 , PROP_AMPLIFICATION , PROP_CLIPPING_METHOD }

enum	{ METHOD_CLIP = 0 , METHOD_WRAP_NEGATIVE , METHOD_WRAP_POSITIVE , METHOD_NOCLIP , NUM_METHODS }

Functions
	GST_DEBUG_CATEGORY_STATIC (gst_audio_amplify_debug)

static GType	gst_audio_amplify_clipping_method_get_type (void)

	G_DEFINE_TYPE (GstAudioAmplify, gst_audio_amplify, GST_TYPE_AUDIO_FILTER)

	GST_ELEMENT_REGISTER_DEFINE (audioamplify, "audioamplify", GST_RANK_NONE,(gst_audio_amplify_get_type()))

static gboolean	gst_audio_amplify_set_process_function (GstAudioAmplify *filter, gint clipping, GstAudioFormat format)

static void	gst_audio_amplify_set_property (GObject object, guint prop_id, const GValue value, GParamSpec *pspec)

static void	gst_audio_amplify_get_property (GObject object, guint prop_id, GValue value, GParamSpec *pspec)

static gboolean	gst_audio_amplify_setup (GstAudioFilter filter, const GstAudioInfo info)

static GstFlowReturn	gst_audio_amplify_transform_ip (GstBaseTransform base, GstBuffer buf)

static void	gst_audio_amplify_transform_gint8_clip (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gint8_wrap_negative (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gint8_wrap_positive (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gint8_noclip (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gint16_clip (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gint16_wrap_negative (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gint16_wrap_positive (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gint16_noclip (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gint32_clip (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gint32_wrap_negative (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gint32_wrap_positive (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gint32_noclip (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gfloat_clip (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gfloat_wrap_negative (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gfloat_wrap_positive (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gfloat_noclip (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gdouble_clip (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gdouble_wrap_negative (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gdouble_wrap_positive (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_transform_gdouble_noclip (GstAudioAmplify filter, void data, guint num_samples)

static void	gst_audio_amplify_class_init (GstAudioAmplifyClass *klass)

static void	gst_audio_amplify_init (GstAudioAmplify *filter)

static GstAudioAmplifyProcessFunc	gst_audio_amplify_process_function (gint clipping, GstAudioFormat format)

Macro Definition Documentation

◆ ALLOWED_CAPS

#define ALLOWED_CAPS

Value:

    "audio/x-raw,"                                                    \
    " format=(string) {S8,"GST_AUDIO_NE(S16)","GST_AUDIO_NE(S32)","   \
                           GST_AUDIO_NE(F32)","GST_AUDIO_NE(F64)"},"  \
    " rate=(int)[1,MAX],"                                             \
    " channels=(int)[1,MAX], "                                        \
    " layout=(string) {interleaved, non-interleaved}"

Definition at line 97 of file audioamplify.c.

◆ GST_CAT_DEFAULT

#define GST_CAT_DEFAULT gst_audio_amplify_debug

SECTION:element-audioamplify @title: audioamplify

Amplifies an audio stream by a given factor and allows the selection of different clipping modes. The difference between the clipping modes is best evaluated by testing.

Example launch line

|[ gst-launch-1.0 audiotestsrc wave=saw ! audioamplify amplification=1.5 ! alsasink gst-launch-1.0 filesrc location="melo1.ogg" ! oggdemux ! vorbisdec ! audioconvert ! audioamplify amplification=1.5 clipping-method=wrap-negative ! alsasink gst-launch-1.0 audiotestsrc wave=saw ! audioconvert ! audioamplify amplification=1.5 clipping-method=wrap-positive ! audioconvert ! alsasink ]|

Definition at line 49 of file audioamplify.c.

◆ GST_TYPE_AUDIO_AMPLIFY_CLIPPING_METHOD

#define GST_TYPE_AUDIO_AMPLIFY_CLIPPING_METHOD (gst_audio_amplify_clipping_method_get_type ())

Definition at line 75 of file audioamplify.c.

◆ MAKE_FLOAT_FUNCS

#define MAKE_FLOAT_FUNCS ( type )

Definition at line 186 of file audioamplify.c.

◆ MAKE_INT_FUNCS

#define MAKE_INT_FUNCS	(	type,
		largetype
	)

Definition at line 128 of file audioamplify.c.

◆ MAX_gint16

#define MAX_gint16 G_MAXINT16

Definition at line 124 of file audioamplify.c.

◆ MAX_gint32

#define MAX_gint32 G_MAXINT32

Definition at line 126 of file audioamplify.c.

◆ MAX_gint8

#define MAX_gint8 G_MAXINT8

Definition at line 122 of file audioamplify.c.

◆ MIN_gint16

#define MIN_gint16 G_MININT16

Definition at line 123 of file audioamplify.c.

◆ MIN_gint32

#define MIN_gint32 G_MININT32

Definition at line 125 of file audioamplify.c.

◆ MIN_gint8

#define MIN_gint8 G_MININT8

Definition at line 121 of file audioamplify.c.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Enumerator
LAST_SIGNAL

Definition at line 53 of file audioamplify.c.

◆ anonymous enum

anonymous enum

Enumerator
PROP_0
PROP_AMPLIFICATION
PROP_CLIPPING_METHOD

Definition at line 59 of file audioamplify.c.

◆ anonymous enum

anonymous enum

Enumerator
METHOD_CLIP
METHOD_WRAP_NEGATIVE
METHOD_WRAP_POSITIVE
METHOD_NOCLIP
NUM_METHODS

Definition at line 66 of file audioamplify.c.

Function Documentation

◆ G_DEFINE_TYPE()

G_DEFINE_TYPE	(	GstAudioAmplify	,
		gst_audio_amplify	,
		GST_TYPE_AUDIO_FILTER
	)

◆ gst_audio_amplify_class_init()

static void gst_audio_amplify_class_init ( GstAudioAmplifyClass * klass )

static

GstAudioAmplify:clipping-method

Clipping method: clip mode set values higher than the maximum to the maximum. The wrap-negative mode pushes those values back from the opposite side, wrap-positive pushes them back from the same side.

Definition at line 257 of file audioamplify.c.

References ALLOWED_CAPS, gst_audio_amplify_get_property(), gst_audio_amplify_set_property(), gst_audio_amplify_setup(), gst_audio_amplify_transform_ip(), GST_TYPE_AUDIO_AMPLIFY_CLIPPING_METHOD, METHOD_CLIP, PROP_AMPLIFICATION, and PROP_CLIPPING_METHOD.