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122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* gstfilter.c: element for filter plug-ins
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "gstfilter.h"
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struct _elements_entry {
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gchar *name;
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GType (*type) (void);
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GstElementDetails *details;
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gboolean (*factoryinit) (GstElementFactory *factory);
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};
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static struct _elements_entry _elements[] = {
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{ "iir", gst_iir_get_type, &gst_iir_details, NULL },
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{ "lpwsinc", gst_lpwsinc_get_type, &gst_lpwsinc_details, NULL },
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{ "bpwsinc", gst_bpwsinc_get_type, &gst_bpwsinc_details, NULL },
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{ NULL, 0 },
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};
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GstPadTemplate*
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gst_filter_src_factory (void)
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{
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static GstPadTemplate *templ = NULL;
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if (!templ) {
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templ = GST_PAD_TEMPLATE_NEW (
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"src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_CAPS_NEW (
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"filter_src",
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"audio/raw",
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"format", GST_PROPS_STRING ("float"),
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"rate", GST_PROPS_INT_RANGE (1, G_MAXINT),
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"layout", GST_PROPS_STRING ("gfloat"),
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"intercept", GST_PROPS_FLOAT(0.0),
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"slope", GST_PROPS_FLOAT(1.0),
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"channels", GST_PROPS_INT (1)
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)
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);
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}
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return templ;
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}
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GstPadTemplate*
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gst_filter_sink_factory (void)
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{
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static GstPadTemplate *templ = NULL;
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if (!templ) {
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templ = GST_PAD_TEMPLATE_NEW (
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"sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_CAPS_NEW (
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"filter_src",
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"audio/raw",
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"format", GST_PROPS_STRING ("float"),
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"rate", GST_PROPS_INT_RANGE (1, G_MAXINT),
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"layout", GST_PROPS_STRING ("gfloat"),
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"intercept", GST_PROPS_FLOAT(0.0),
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"slope", GST_PROPS_FLOAT(1.0),
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"channels", GST_PROPS_INT (1)
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)
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);
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}
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return templ;
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}
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static gboolean
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plugin_init (GModule * module, GstPlugin * plugin)
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{
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GstElementFactory *factory;
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gint i = 0;
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while (_elements[i].name) {
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factory = gst_element_factory_new (_elements[i].name,
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(_elements[i].type) (),
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_elements[i].details);
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if (!factory) {
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g_warning ("gst_filter_new failed for `%s'",
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_elements[i].name);
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continue;
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}
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gst_element_factory_add_pad_template (factory, gst_filter_src_factory ());
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gst_element_factory_add_pad_template (factory, gst_filter_sink_factory ());
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gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
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if (_elements[i].factoryinit) {
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_elements[i].factoryinit (factory);
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}
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i++;
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}
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return TRUE;
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}
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GstPluginDesc plugin_desc = {
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GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"filter",
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plugin_init
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};
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