GstAudioFilter

GstAudioFilter is a GstBaseTransform-derived base class for simple audio filters, ie. those that output the same format that they get as input.

GstAudioFilter will parse the input format for you (with error checking) before calling your setup function. Also, elements deriving from GstAudioFilter may use gst_audio_filter_class_add_pad_templates from their class_init function to easily configure the set of caps/formats that the element is able to handle.

Derived classes should override the setup() and transform_ip() and/or transform() virtual functions in their class_init function.

GstAudioFilter

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstBaseTransform
                    ╰──GstAudioFilter

Base class for audio filters with the same format for input and output.

Members

basetransform (GstBaseTransform) –
No description available
info (GstAudioInfo) –
No description available

Class structure

GstAudioFilterClass

In addition to the setup virtual function, you should also override the GstBaseTransform::transform and/or GstBaseTransform::transform_ip virtual function.

Fields
basetransformclass (GstBaseTransformClass) –

parent class


GstAudio.AudioFilterClass

In addition to the setup virtual function, you should also override the GstBaseTransform::transform and/or GstBaseTransform::transform_ip virtual function.

Attributes
basetransformclass (GstBase.BaseTransformClass) –

parent class


GstAudio.AudioFilterClass

In addition to the setup virtual function, you should also override the GstBaseTransform::transform and/or GstBaseTransform::transform_ip virtual function.

Attributes
basetransformclass (GstBase.BaseTransformClass) –

parent class


GstAudioFilter

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstBaseTransform
                    ╰──GstAudioFilter

Base class for audio filters with the same format for input and output.

Members

basetransform (GstBaseTransform) –
No description available
info (GstAudioInfo) –
No description available

GstAudioFilter

GObject
    ╰──GInitiallyUnowned
        ╰──GstObject
            ╰──GstElement
                ╰──GstBaseTransform
                    ╰──GstAudioFilter

Base class for audio filters with the same format for input and output.

Members

basetransform (GstBaseTransform) –
No description available
info (GstAudioInfo) –
No description available

Class Methods

gst_audio_filter_class_add_pad_templates

gst_audio_filter_class_add_pad_templates (GstAudioFilterClass * klass,
                                          GstCaps * allowed_caps)

Convenience function to add pad templates to this element class, with allowed_caps as the caps that can be handled.

This function is usually used from within a GObject class_init function.

Parameters:

klass

an GstAudioFilterClass

allowed_caps

what formats the filter can handle, as GstCaps


GstAudio.AudioFilterClass.prototype.add_pad_templates

function GstAudio.AudioFilterClass.prototype.add_pad_templates(klass: GstAudio.AudioFilterClass, allowed_caps: Gst.Caps): {
    // javascript wrapper for 'gst_audio_filter_class_add_pad_templates'
}

Convenience function to add pad templates to this element class, with allowed_caps as the caps that can be handled.

This function is usually used from within a GObject class_init function.

Parameters:

allowed_caps ( Gst.Caps ) –

what formats the filter can handle, as Gst.Caps


Virtual Methods

setup

gboolean
setup (GstAudioFilter * filter,
       const GstAudioInfo * info)

virtual function called whenever the format changes

Parameters:

filter
No description available
info
No description available
Returns
No description available

do_setup

def do_setup (filter, info):
    #python implementation of the 'setup' virtual method

virtual function called whenever the format changes

Parameters:

filter ( GstAudio.AudioFilter ) –
No description available
info ( GstAudio.AudioInfo ) –
No description available
Returns ( bool ) –
No description available

vfunc_setup

function vfunc_setup(filter: GstAudio.AudioFilter, info: GstAudio.AudioInfo): {
    // javascript implementation of the 'setup' virtual method
}

virtual function called whenever the format changes

Parameters:

filter ( GstAudio.AudioFilter ) –
No description available
info ( GstAudio.AudioInfo ) –
No description available
Returns ( Number ) –
No description available

Function Macros

GST_AUDIO_FILTER_BPF

#define GST_AUDIO_FILTER_BPF(filter)      (GST_AUDIO_INFO_BPF(GST_AUDIO_FILTER_INFO(filter)))

GST_AUDIO_FILTER_BPS

#define GST_AUDIO_FILTER_BPS(filter)      (GST_AUDIO_INFO_BPS(GST_AUDIO_FILTER_INFO(filter)))

GST_AUDIO_FILTER_CAST

#define GST_AUDIO_FILTER_CAST(obj) \
  ((GstAudioFilter *) (obj))

GST_AUDIO_FILTER_CHANNELS

#define GST_AUDIO_FILTER_CHANNELS(filter) (GST_AUDIO_INFO_CHANNELS(GST_AUDIO_FILTER_INFO(filter)))

GST_AUDIO_FILTER_CLASS_CAST

#define GST_AUDIO_FILTER_CLASS_CAST(klass) \
  ((GstAudioFilterClass *) (klass))

GST_AUDIO_FILTER_FORMAT

#define GST_AUDIO_FILTER_FORMAT(filter)   (GST_AUDIO_INFO_FORMAT(GST_AUDIO_FILTER_INFO(filter)))

GST_AUDIO_FILTER_INFO

#define GST_AUDIO_FILTER_INFO(filter)     (&GST_AUDIO_FILTER_CAST(filter)->info)

GST_AUDIO_FILTER_RATE

#define GST_AUDIO_FILTER_RATE(filter)     (GST_AUDIO_INFO_RATE(GST_AUDIO_FILTER_INFO(filter)))

Constants

GST_TYPE_AUDIO_FILTER

#define GST_TYPE_AUDIO_FILTER \
  (gst_audio_filter_get_type())

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