--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_base/gst-libs/gst/audio/gstaudiofilterexample.c Wed Sep 01 12:16:41 2010 +0100
@@ -0,0 +1,262 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) <2003> David Schleef <ds@schleef.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/*
+ * This file was (probably) generated from
+ * gstaudiofiltertemplate.c,v 1.14 2007-02-03 23:28:45 tpm Exp
+ * and
+ * $Id: make_filter,v 1.3 2004-04-19 22:51:56 ds Exp $
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+#include <gst/audio/audio.h>
+#include <gst/audio/gstaudiofilter.h>
+#include <string.h>
+
+GST_DEBUG_CATEGORY_STATIC (audio_filter_template_debug);
+#define GST_CAT_DEFAULT audio_filter_template_debug
+
+static const GstElementDetails audio_filter_template_details =
+GST_ELEMENT_DETAILS ("Audio filter template",
+ "Filter/Effect/Audio",
+ "Filters audio",
+ "David Schleef <ds@schleef.org>");
+
+typedef struct _GstAudioFilterTemplate GstAudioFilterTemplate;
+typedef struct _GstAudioFilterTemplateClass GstAudioFilterTemplateClass;
+
+#define GST_TYPE_AUDIO_FILTER_TEMPLATE \
+ (gst_audio_filter_template_get_type())
+#define GST_AUDIO_FILTER_TEMPLATE(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_FILTER_TEMPLATE,GstAudioFilterTemplate))
+#define GST_AUDIO_FILTER_TEMPLATE_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIO_FILTER_TEMPLATE,GstAudioFilterTemplateClass))
+#define GST_IS_AUDIO_FILTER_TEMPLATE(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_FILTER_TEMPLATE))
+#define GST_IS_AUDIO_FILTER_TEMPLATE_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIO_FILTER_TEMPLATE))
+
+struct _GstAudioFilterTemplate
+{
+ GstAudioFilter audiofilter;
+};
+
+struct _GstAudioFilterTemplateClass
+{
+ GstAudioFilterClass parent_class;
+};
+
+
+enum
+{
+ /* FILL ME */
+ LAST_SIGNAL
+};
+
+enum
+{
+ ARG_0
+ /* FILL ME */
+};
+
+GST_BOILERPLATE (GstAudioFilterTemplate, gst_audio_filter_template,
+ GstAudioFilter, GST_TYPE_AUDIO_FILTER);
+
+static void gst_audio_filter_template_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec);
+static void gst_audio_filter_template_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec);
+
+static gboolean gst_audio_filter_template_setup (GstAudioFilter * filter,
+ GstRingBufferSpec * spec);
+static GstFlowReturn gst_audio_filter_template_filter (GstBaseTransform * bt,
+ GstBuffer * outbuf, GstBuffer * inbuf);
+static GstFlowReturn
+gst_audio_filter_template_filter_inplace (GstBaseTransform * base_transform,
+ GstBuffer * buf);
+
+#define ALLOWED_CAPS_STRING \
+ GST_AUDIO_INT_STANDARD_PAD_TEMPLATE_CAPS
+
+static void
+gst_audio_filter_template_base_init (gpointer g_class)
+{
+ GstAudioFilterTemplateClass *klass = (GstAudioFilterTemplateClass *) g_class;
+ GstAudioFilterClass *audiofilter_class = GST_AUDIO_FILTER_CLASS (g_class);
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+ GstCaps *caps;
+
+ gst_element_class_set_details (element_class, &audio_filter_template_details);
+
+ caps = gst_caps_from_string (ALLOWED_CAPS_STRING);
+ gst_audio_filter_class_add_pad_templates (audiofilter_class, caps);
+ gst_caps_unref (caps);
+}
+
+static void
+gst_audio_filter_template_class_init (GstAudioFilterTemplateClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstBaseTransformClass *btrans_class;
+ GstAudioFilterClass *audio_filter_class;
+
+ gobject_class = (GObjectClass *) klass;
+ btrans_class = (GstBaseTransformClass *) klass;
+ audio_filter_class = (GstAudioFilterClass *) klass;
+
+#if 0
+ g_object_class_install_property (gobject_class, ARG_METHOD,
+ g_param_spec_enum ("method", "method", "method",
+ GST_TYPE_AUDIOTEMPLATE_METHOD, GST_AUDIOTEMPLATE_METHOD_1,
+ G_PARAM_READWRITE));
+#endif
+
+ gobject_class->set_property = gst_audio_filter_template_set_property;
+ gobject_class->get_property = gst_audio_filter_template_get_property;
+
+ /* this function will be called whenever the format changes */
+ audio_filter_class->setup = gst_audio_filter_template_setup;
+
+ /* here you set up functions to process data (either in place, or from
+ * one input buffer to another output buffer); only one is required */
+ btrans_class->transform = gst_audio_filter_template_filter;
+ btrans_class->transform_ip = gst_audio_filter_template_filter_inplace;
+}
+
+static void
+gst_audio_filter_template_init (GstAudioFilterTemplate * audio_filter_template,
+ GstAudioFilterTemplateClass * g_class)
+{
+ GST_DEBUG ("init");
+
+ /* do stuff if you need to */
+}
+
+static void
+gst_audio_filter_template_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstAudioFilterTemplate *filter;
+
+ filter = GST_AUDIO_FILTER_TEMPLATE (object);
+
+ GST_DEBUG ("set property %u", prop_id);
+
+ GST_OBJECT_LOCK (filter);
+ switch (prop_id) {
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+ GST_OBJECT_UNLOCK (filter);
+}
+
+static void
+gst_audio_filter_template_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstAudioFilterTemplate *filter;
+
+ filter = GST_AUDIO_FILTER_TEMPLATE (object);
+
+ GST_DEBUG ("get property %u", prop_id);
+
+ GST_OBJECT_LOCK (filter);
+ switch (prop_id) {
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+ GST_OBJECT_UNLOCK (filter);
+}
+
+static gboolean
+gst_audio_filter_template_setup (GstAudioFilter * filter,
+ GstRingBufferSpec * spec)
+{
+ GstAudioFilterTemplate *audio_filter_template;
+
+ audio_filter_template = GST_AUDIO_FILTER_TEMPLATE (filter);
+
+ /* if any setup needs to be done, do it here */
+
+ return TRUE; /* it's all good */
+}
+
+/* You may choose to implement either a copying filter or an
+ * in-place filter (or both). Implementing only one will give
+ * full functionality, however, implementing both will cause
+ * audiofilter to use the optimal function in every situation,
+ * with a minimum of memory copies. */
+
+static GstFlowReturn
+gst_audio_filter_template_filter (GstBaseTransform * base_transform,
+ GstBuffer * inbuf, GstBuffer * outbuf)
+{
+ GstAudioFilterTemplate *audio_filter_template;
+ GstAudioFilter *audiofilter;
+
+ audiofilter = GST_AUDIO_FILTER (base_transform);
+ audio_filter_template = GST_AUDIO_FILTER_TEMPLATE (base_transform);
+
+ /* do something interesting here. This simply copies the source
+ * to the destination. */
+
+ memcpy (GST_BUFFER_DATA (outbuf), GST_BUFFER_DATA (inbuf),
+ GST_BUFFER_SIZE (inbuf));
+
+ return GST_FLOW_OK;
+}
+
+static GstFlowReturn
+gst_audio_filter_template_filter_inplace (GstBaseTransform * base_transform,
+ GstBuffer * buf)
+{
+ GstAudioFilterTemplate *audio_filter_template;
+ GstAudioFilter *audiofilter;
+
+ audiofilter = GST_AUDIO_FILTER (base_transform);
+ audio_filter_template = GST_AUDIO_FILTER_TEMPLATE (base_transform);
+
+ /* do something interesting here. This simply copies the source
+ * to the destination. */
+
+ return GST_FLOW_OK;
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ GST_DEBUG_CATEGORY_INIT (audio_filter_template_debug, "audiofilterexample",
+ 0, "audiofilterexample");
+
+ return gst_element_register (plugin, "audiofilterexample", GST_RANK_NONE,
+ GST_TYPE_AUDIO_FILTER_TEMPLATE);
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "gstaudio_filter_template",
+ "Audio filter template",
+ plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);