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<html>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>GstAudioFilter: GStreamer Base Plugins 1.0 Library Reference Manual</title>
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Top  | 
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                  Description  | 
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                  Object Hierarchy
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GstAudioFilter
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GstAudioFilter — Base class for simple audio filters
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Functions
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void
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gst_audio_filter_class_add_pad_templates ()
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Types and Values
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struct
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GstAudioFilter
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struct
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GstAudioFilterClass
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Object Hierarchy
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    GObject
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    ╰── GInitiallyUnowned
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        ╰── GstObject
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            ╰── GstElement
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                ╰── GstBaseTransform
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                    ╰── GstAudioFilter
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Includes
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#include <gst/audio/gstaudiofilter.h>
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Description
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GstAudioFilter is a GstBaseTransform-derived base class for simple audio
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filters, ie. those that output the same format that they get as input.
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GstAudioFilter will parse the input format for you (with error checking)
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before calling your setup function. Also, elements deriving from
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GstAudioFilter may use gst_audio_filter_class_add_pad_templates() from
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their class_init function to easily configure the set of caps/formats that
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the element is able to handle.
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Derived classes should override the GstAudioFilterClass.setup() and
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GstBaseTransformClass.transform_ip() and/or
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GstBaseTransformClass.transform()
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virtual functions in their class_init function.
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Functions
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gst_audio_filter_class_add_pad_templates ()
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void
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gst_audio_filter_class_add_pad_templates
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                               (GstAudioFilterClass *klass,
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                                GstCaps *allowed_caps);
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Convenience function to add pad templates to this element class, with
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allowed_caps
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 as the caps that can be handled.
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This function is usually used from within a GObject class_init function.
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Parameters
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klass
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an GstAudioFilterClass
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allowed_caps
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what formats the filter can handle, as GstCaps
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Types and Values
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struct GstAudioFilter
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struct GstAudioFilter;
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Base class for audio filters with the same format for input and output.
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struct GstAudioFilterClass
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struct GstAudioFilterClass {
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  GstBaseTransformClass basetransformclass;
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  /* virtual function, called whenever the format changes */
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  gboolean  (*setup) (GstAudioFilter * filter, const GstAudioInfo * info);
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};
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In addition to the setup
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 virtual function, you should also override the
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GstBaseTransform::transform and/or GstBaseTransform::transform_ip virtual
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function.
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Members
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GstBaseTransformClass basetransformclass;
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parent class
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setup ()
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virtual function called whenever the format changes
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