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element-templates: improve the audiofilter template

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Add comments. Add start/stop methods. Add (commented) instance casts at the
begin of the method. Make transform_ip returning FLOW_OK by default.
This commit is contained in:
Stefan Kost 2011-04-27 16:56:09 +03:00
parent f76feeb632
commit c46725845b
1 changed files with 30 additions and 1 deletions
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31
tools/element-templates/audiofilter
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@ -12,27 +12,56 @@ gstreamer-audio-0.10
% prototypes
static gboolean
gst_replace_setup (GstAudioFilter * filter, GstRingBufferSpec * format);
static gboolean
gst_replace_start (GstBaseTransform * trans);
static GstFlowReturn
gst_replace_transform_ip (GstBaseTransform * trans, GstBuffer * buf);
static gboolean
gst_replace_stop (GstBaseTransform * trans);
% declare-class
GstAudioFilterClass *audio_filter_class = GST_AUDIO_FILTER_CLASS (klass);
GstBaseTransformClass *base_transform_class = GST_BASE_TRANSFORM_CLASS (klass);
% set-methods
audio_filter_class->setup = GST_DEBUG_FUNCPTR (gst_replace_setup);
base_transform_class->start = GST_DEBUG_FUNCPTR (gst_replace_start);
base_transform_class->transform_ip = GST_DEBUG_FUNCPTR (gst_replace_transform_ip);
base_transform_class->stop = GST_DEBUG_FUNCPTR (gst_replace_stop);
% methods
static gboolean
gst_replace_setup (GstAudioFilter * filter, GstRingBufferSpec * format)
{
/* GstReplace *replace = GST_REPLACE (filter); */
/* handle audio format changes */
return TRUE;
}
static gboolean
gst_replace_start (GstBaseTransform * trans)
{
/* GstReplace *replace = GST_REPLACE (trans); */
/* initialize processing */
return TRUE;
}
static GstFlowReturn
gst_replace_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
{
/* GstReplace *replace = GST_REPLACE (trans); */
return GST_FLOW_ERROR;
/* process the audio data in the buffer in-place */
return GST_FLOW_OK;
}
static gboolean
gst_replace_stop (GstBaseTransform * trans)
{
/* GstReplace *replace = GST_REPLACE (trans); */
/* finalize processing */
return TRUE;
}
% end