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authorAndy Wingo <wingo@pobox.com>2001-12-22 23:27:31 +0000
committerAndy Wingo <wingo@pobox.com>2001-12-22 23:27:31 +0000
commit185612aae3b8acae2b32e0e6561691a7c640cd0d (patch)
tree7cd1990c3df5c63f402f3e0bdf6b51b3ed58fc41 /gst/level/gstlevel.c
parent87dab192cf5792f847a22e0c3e9afe78553739b5 (diff)
Initial revision
Original commit message from CVS: Initial revision
Diffstat (limited to 'gst/level/gstlevel.c')
-rw-r--r--gst/level/gstlevel.c285
1 files changed, 285 insertions, 0 deletions
diff --git a/gst/level/gstlevel.c b/gst/level/gstlevel.c
new file mode 100644
index 00000000..cd839a32
--- /dev/null
+++ b/gst/level/gstlevel.c
@@ -0,0 +1,285 @@
+/* Gnome-Streamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * 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.
+ */
+
+#include <gst/gst.h>
+#include "gstlevel.h"
+#include "math.h"
+
+
+static GstElementDetails level_details = {
+ "Level",
+ "Filter/Effect",
+ "RMS Level indicator for audio/raw",
+ VERSION,
+ "Thomas <thomas@apestaart.org>",
+ "(C) 2001",
+};
+
+
+/* Filter signals and args */
+enum {
+ /* FILL ME */
+ LAST_SIGNAL
+};
+
+enum {
+ ARG_0
+};
+
+static GstPadTemplate*
+level_src_factory (void)
+{
+ static GstPadTemplate *template = NULL;
+
+ if (!template) {
+ template = gst_padtemplate_new (
+ "src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ gst_caps_new (
+ "test_src",
+ "audio/raw",
+ gst_props_new (
+ "channels", GST_PROPS_INT_RANGE (1, 2),
+ NULL)),
+ NULL);
+ }
+ return template;
+}
+
+static GstPadTemplate*
+level_sink_factory (void)
+{
+ static GstPadTemplate *template = NULL;
+
+ if (!template) {
+ template = gst_padtemplate_new (
+ "sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ gst_caps_new (
+ "test_src",
+ "audio/raw",
+ gst_props_new (
+ "channels", GST_PROPS_INT_RANGE (1, 2),
+ NULL)),
+ NULL);
+ }
+ return template;
+}
+
+static void gst_level_class_init (GstLevelClass *klass);
+static void gst_level_init (GstLevel *filter);
+
+static void gst_level_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
+static void gst_level_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
+
+static void gst_level_chain (GstPad *pad, GstBuffer *buf);
+static void inline gst_level_fast_16bit_chain (gint16* data, gint16** out_data,
+ guint numsamples);
+static void inline gst_level_fast_8bit_chain (gint8* data, gint8** out_data,
+ guint numsamples);
+
+static GstElementClass *parent_class = NULL;
+//static guint gst_filter_signals[LAST_SIGNAL] = { 0 };
+
+static GstPadNegotiateReturn
+level_negotiate_src (GstPad *pad, GstCaps **caps, gpointer *data)
+{
+ GstLevel* filter = GST_LEVEL (gst_pad_get_parent (pad));
+
+ if (*caps==NULL)
+ return GST_PAD_NEGOTIATE_FAIL;
+
+ return gst_pad_negotiate_proxy(pad,filter->sinkpad,caps);
+}
+
+static GstPadNegotiateReturn
+level_negotiate_sink (GstPad *pad, GstCaps **caps, gpointer *data)
+{
+ GstLevel* filter = GST_LEVEL (gst_pad_get_parent (pad));
+
+ if (*caps==NULL)
+ return GST_PAD_NEGOTIATE_FAIL;
+
+ return gst_pad_negotiate_proxy(pad,filter->srcpad,caps);
+}
+
+GType
+gst_level_get_type(void) {
+ static GType level_type = 0;
+
+ if (!level_type) {
+ static const GTypeInfo level_info = {
+ sizeof(GstLevelClass), NULL,
+ NULL,
+ (GClassInitFunc)gst_level_class_init,
+ NULL,
+ NULL,
+ sizeof(GstLevel),
+ 0,
+ (GInstanceInitFunc)gst_level_init,
+ };
+ level_type = g_type_register_static(GST_TYPE_ELEMENT, "GstLevel", &level_info, 0);
+ }
+ return level_type;
+}
+
+static void
+gst_level_class_init (GstLevelClass *klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = (GObjectClass*)klass;
+ gstelement_class = (GstElementClass*)klass;
+
+ parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
+
+ gobject_class->set_property = gst_level_set_property;
+ gobject_class->get_property = gst_level_get_property;
+}
+
+static void
+gst_level_init (GstLevel *filter)
+{
+ filter->sinkpad = gst_pad_new_from_template(level_sink_factory (),"sink");
+ filter->srcpad = gst_pad_new_from_template(level_src_factory (),"src");
+
+ gst_pad_set_negotiate_function(filter->sinkpad,level_negotiate_sink);
+ gst_pad_set_negotiate_function(filter->srcpad,level_negotiate_src);
+
+ gst_element_add_pad(GST_ELEMENT(filter),filter->sinkpad);
+ gst_pad_set_chain_function(filter->sinkpad,gst_level_chain);
+ filter->srcpad = gst_pad_new("src",GST_PAD_SRC);
+ gst_element_add_pad(GST_ELEMENT(filter),filter->srcpad);
+}
+
+static void
+gst_level_chain (GstPad *pad,GstBuffer *buf)
+{
+ GstLevel *filter;
+ gint16 *in_data;
+ gint16 *out_data;
+ GstBuffer* outbuf;
+ gint width;
+
+ GstCaps *caps;
+
+ g_return_if_fail(pad != NULL);
+ g_return_if_fail(GST_IS_PAD(pad));
+ g_return_if_fail(buf != NULL);
+
+ filter = GST_LEVEL(GST_OBJECT_PARENT (pad));
+ g_return_if_fail(filter != NULL);
+ g_return_if_fail(GST_IS_LEVEL(filter));
+
+ caps = NULL;
+ caps = GST_PAD_CAPS(pad);
+ if (caps == NULL)
+ {
+ // FIXME : Please change this to a better warning method !
+ printf ("WARNING : chain : Could not get caps of pad !\n");
+ }
+
+ width = gst_caps_get_int(caps, "width");
+
+ in_data = (gint16 *)GST_BUFFER_DATA(buf);
+ outbuf=gst_buffer_new();
+ GST_BUFFER_DATA(outbuf) = (gchar*)g_new(gint16,GST_BUFFER_SIZE(buf)/2);
+ GST_BUFFER_SIZE(outbuf) = GST_BUFFER_SIZE(buf);
+
+ out_data = (gint16*)GST_BUFFER_DATA(outbuf);
+
+ switch (width) {
+ case 16:
+ gst_level_fast_16bit_chain(in_data,&out_data,GST_BUFFER_SIZE(buf)/2);
+ break;
+ case 8:
+ gst_level_fast_8bit_chain((gint8*)in_data,(gint8**)&out_data,GST_BUFFER_SIZE(buf));
+ break;
+ }
+ gst_buffer_unref(buf);
+ gst_pad_push(filter->srcpad,outbuf);
+}
+
+static void inline
+gst_level_fast_16bit_chain(gint16* in_data, gint16** out_data,
+ guint num_samples)
+#include "filter.func"
+
+static void inline
+gst_level_fast_8bit_chain(gint8* in_data, gint8** out_data,
+ guint num_samples)
+#include "filter.func"
+
+static void
+gst_level_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+{
+ GstLevel *filter;
+
+ /* it's not null if we got it, but it might not be ours */
+ g_return_if_fail(GST_IS_LEVEL(object));
+ filter = GST_LEVEL(object);
+
+ switch (prop_id) {
+ default:
+ break;
+ }
+}
+
+static void
+gst_level_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
+{
+ GstLevel *filter;
+
+ /* it's not null if we got it, but it might not be ours */
+ g_return_if_fail(GST_IS_LEVEL(object));
+ filter = GST_LEVEL(object);
+
+ switch (prop_id) {
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static gboolean
+plugin_init (GModule *module, GstPlugin *plugin)
+{
+ GstElementFactory *factory;
+
+ factory = gst_elementfactory_new("level",GST_TYPE_LEVEL,
+ &level_details);
+ g_return_val_if_fail(factory != NULL, FALSE);
+
+ gst_elementfactory_add_padtemplate (factory, level_src_factory ());
+ gst_elementfactory_add_padtemplate (factory, level_sink_factory ());
+
+ gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+
+ return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+ GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "level",
+ plugin_init
+};