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-rw-r--r--gst/passthrough/gstpassthrough.c351
1 files changed, 351 insertions, 0 deletions
diff --git a/gst/passthrough/gstpassthrough.c b/gst/passthrough/gstpassthrough.c
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+++ b/gst/passthrough/gstpassthrough.c
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+/* -*- c-basic-offset: 2 -*-
+ * GStreamer
+ * Copyright (C) 1999-2001 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 <string.h>
+#include <gst/gst.h>
+#include <libs/audio/gstaudio.h>
+#include "gstpassthrough.h"
+
+
+
+static GstElementDetails passthrough_details = {
+ "Passthrough",
+ "Filter/Effect",
+ "Transparent filter for audio/raw (boilerplate for effects)",
+ VERSION,
+ "Thomas <thomas@apestaart.org>, "\
+ "Andy Wingo <apwingo@eos.ncsu.edu>",
+ "(C) 2001",
+};
+
+
+/* Filter signals and args */
+enum {
+ /* FILL ME */
+ LAST_SIGNAL
+};
+
+enum {
+ ARG_0,
+ ARG_SILENT
+};
+
+static GstPadTemplate*
+passthrough_sink_factory (void)
+{
+ static GstPadTemplate *template = NULL;
+
+ if (!template) {
+ template = gst_padtemplate_new
+ ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
+ gst_caps_append(gst_caps_new ("sink_int", "audio/raw",
+ GST_AUDIO_INT_PAD_TEMPLATE_PROPS),
+ gst_caps_new ("sink_float", "audio/raw",
+ GST_AUDIO_FLOAT_MONO_PAD_TEMPLATE_PROPS)),
+ NULL);
+ }
+ return template;
+}
+
+static GstPadTemplate*
+passthrough_src_factory (void)
+{
+ static GstPadTemplate *template = NULL;
+
+ if (!template)
+ template = gst_padtemplate_new
+ ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
+ gst_caps_append (gst_caps_new ("src_float", "audio/raw",
+ GST_AUDIO_FLOAT_MONO_PAD_TEMPLATE_PROPS),
+ gst_caps_new ("src_int", "audio/raw",
+ GST_AUDIO_INT_PAD_TEMPLATE_PROPS)),
+ NULL);
+
+ return template;
+}
+
+static void passthrough_class_init (GstPassthroughClass *klass);
+static void passthrough_init (GstPassthrough *filter);
+
+static void passthrough_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
+static void passthrough_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
+
+static gint passthrough_parse_caps (GstPassthrough *filter, GstCaps *caps);
+
+static void passthrough_chain (GstPad *pad, GstBuffer *buf);
+static void inline passthrough_fast_float_chain (gfloat* data, guint numsamples);
+static void inline passthrough_fast_16bit_chain (gint16* data, guint numsamples);
+static void inline passthrough_fast_8bit_chain (gint8* data, guint numsamples);
+
+static GstElementClass *parent_class = NULL;
+//static guint gst_filter_signals[LAST_SIGNAL] = { 0 };
+
+static GstBufferPool*
+passthrough_get_bufferpool (GstPad *pad)
+{
+ GstPassthrough *filter;
+
+ filter = GST_PASSTHROUGH (gst_pad_get_parent (pad));
+
+ return gst_pad_get_bufferpool (filter->srcpad);
+}
+
+static GstPadNegotiateReturn
+passthrough_negotiate_src (GstPad *pad, GstCaps **caps, gpointer *data)
+{
+ GstPassthrough* filter = GST_PASSTHROUGH (gst_pad_get_parent (pad));
+
+ if (*caps==NULL)
+ return GST_PAD_NEGOTIATE_FAIL;
+
+ if (passthrough_parse_caps(filter, *caps))
+ return GST_PAD_NEGOTIATE_FAIL;
+
+ return gst_pad_negotiate_proxy(pad,filter->sinkpad,caps);
+}
+
+static GstPadNegotiateReturn
+passthrough_negotiate_sink (GstPad *pad, GstCaps **caps, gpointer *data)
+{
+ GstPassthrough* filter = GST_PASSTHROUGH (gst_pad_get_parent (pad));
+
+ if (*caps==NULL)
+ return GST_PAD_NEGOTIATE_FAIL;
+
+ if (passthrough_parse_caps(filter, *caps))
+ return GST_PAD_NEGOTIATE_FAIL;
+
+ return gst_pad_negotiate_proxy(pad,filter->srcpad,caps);
+}
+
+static gint
+passthrough_parse_caps (GstPassthrough *filter, GstCaps *caps)
+{
+ const gchar *format;
+
+ g_return_val_if_fail(filter!=NULL,-1);
+ g_return_val_if_fail(caps!=NULL,-1);
+
+ format = gst_caps_get_string(caps, "format");
+
+ filter->rate = gst_caps_get_int (caps, "rate");
+ filter->channels = gst_caps_get_int (caps, "channels");
+
+ if (strcmp(format, "int")==0) {
+ filter->format = GST_PASSTHROUGH_FORMAT_INT;
+ filter->width = gst_caps_get_int (caps, "width");
+ filter->depth = gst_caps_get_int (caps, "depth");
+ filter->law = gst_caps_get_int (caps, "law");
+ filter->endianness = gst_caps_get_int (caps, "endianness");
+ filter->is_signed = gst_caps_get_int (caps, "signed");
+ if (!filter->silent) {
+ g_print ("Passthrough : channels %d, rate %d\n",
+ filter->channels, filter->rate);
+ g_print ("Passthrough : format int, bit width %d, endianness %d, signed %s\n",
+ filter->width, filter->endianness, filter->is_signed ? "yes" : "no");
+ }
+ } else if (strcmp(format, "float")==0) {
+ filter->format = GST_PASSTHROUGH_FORMAT_FLOAT;
+ filter->layout = gst_caps_get_string(caps, "layout");
+ filter->intercept = gst_caps_get_float(caps, "intercept");
+ filter->slope = gst_caps_get_float(caps, "slope");
+ if (!filter->silent) {
+ g_print ("Passthrough : channels %d, rate %d\n",
+ filter->channels, filter->rate);
+ g_print ("Passthrough : format float, layout %s, intercept %f, slope %f\n",
+ filter->layout, filter->intercept, filter->slope);
+ }
+ } else {
+ return -1;
+ }
+ return 0;
+}
+
+
+GType
+gst_passthrough_get_type(void) {
+ static GType passthrough_type = 0;
+
+ if (!passthrough_type) {
+ static const GTypeInfo passthrough_info = {
+ sizeof(GstPassthroughClass), NULL,
+ NULL,
+ (GClassInitFunc)passthrough_class_init,
+ NULL,
+ NULL,
+ sizeof(GstPassthrough),
+ 0,
+ (GInstanceInitFunc)passthrough_init,
+ };
+ passthrough_type = g_type_register_static(GST_TYPE_ELEMENT, "GstPassthrough", &passthrough_info, 0);
+ }
+ return passthrough_type;
+}
+
+static void
+passthrough_class_init (GstPassthroughClass *klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = (GObjectClass*)klass;
+ gstelement_class = (GstElementClass*)klass;
+
+ parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
+
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_SILENT,
+ g_param_spec_boolean("silent","silent","silent",
+ TRUE,G_PARAM_READWRITE)); // CHECKME
+
+ gobject_class->set_property = passthrough_set_property;
+ gobject_class->get_property = passthrough_get_property;
+}
+
+static void
+passthrough_init (GstPassthrough *filter)
+{
+ filter->sinkpad = gst_pad_new_from_template(passthrough_sink_factory (),"sink");
+ gst_pad_set_negotiate_function(filter->sinkpad,passthrough_negotiate_sink);
+ gst_pad_set_bufferpool_function(filter->sinkpad,passthrough_get_bufferpool);
+ filter->srcpad = gst_pad_new_from_template(passthrough_src_factory (),"src");
+ gst_pad_set_negotiate_function(filter->srcpad,passthrough_negotiate_src);
+
+ gst_element_add_pad(GST_ELEMENT(filter),filter->sinkpad);
+ gst_element_add_pad(GST_ELEMENT(filter),filter->srcpad);
+ gst_pad_set_chain_function(filter->sinkpad,passthrough_chain);
+ filter->silent = FALSE;
+}
+
+static void
+passthrough_chain (GstPad *pad, GstBuffer *buf)
+{
+ GstPassthrough *filter;
+ gint16 *int_data;
+ gfloat *float_data;
+
+ g_return_if_fail(pad != NULL);
+ g_return_if_fail(GST_IS_PAD(pad));
+ g_return_if_fail(buf != NULL);
+
+ filter = GST_PASSTHROUGH(GST_OBJECT_PARENT (pad));
+ g_return_if_fail(filter != NULL);
+ g_return_if_fail(GST_IS_PASSTHROUGH(filter));
+
+ switch (filter->format) {
+ case GST_PASSTHROUGH_FORMAT_INT:
+ int_data = (gint16 *)GST_BUFFER_DATA(buf);
+
+ switch (filter->width) {
+ case 16:
+ passthrough_fast_16bit_chain(int_data,GST_BUFFER_SIZE(buf)/2);
+ break;
+ case 8:
+ passthrough_fast_8bit_chain((gint8*)int_data,GST_BUFFER_SIZE(buf));
+ break;
+ }
+
+ break;
+ case GST_PASSTHROUGH_FORMAT_FLOAT:
+ float_data = (gfloat *)GST_BUFFER_DATA(buf);
+
+ passthrough_fast_float_chain(float_data,GST_BUFFER_SIZE(buf)/sizeof(float));
+
+ break;
+ }
+
+ gst_pad_push(filter->srcpad,buf);
+}
+
+static void inline
+passthrough_fast_float_chain(gfloat* data,
+ guint num_samples)
+#include "filter.func"
+
+static void inline
+passthrough_fast_16bit_chain(gint16* data,
+ guint num_samples)
+#include "filter.func"
+
+static void inline
+passthrough_fast_8bit_chain(gint8* data,
+ guint num_samples)
+#include "filter.func"
+
+static void
+passthrough_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+{
+ GstPassthrough *filter;
+
+ /* it's not null if we got it, but it might not be ours */
+ g_return_if_fail(GST_IS_PASSTHROUGH(object));
+ filter = GST_PASSTHROUGH(object);
+
+ switch (prop_id)
+ {
+ case ARG_SILENT:
+ filter->silent = g_value_get_boolean (value);
+ break;
+ default:
+ break;
+ }
+}
+
+static void
+passthrough_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
+{
+ GstPassthrough *filter;
+
+ /* it's not null if we got it, but it might not be ours */
+ g_return_if_fail(GST_IS_PASSTHROUGH(object));
+ filter = GST_PASSTHROUGH(object);
+
+ switch (prop_id) {
+ case ARG_SILENT:
+ g_value_set_boolean (value, filter->silent);
+ break;
+ 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("passthrough",GST_TYPE_PASSTHROUGH,
+ &passthrough_details);
+ g_return_val_if_fail(factory != NULL, FALSE);
+
+ gst_elementfactory_add_padtemplate (factory, passthrough_src_factory ());
+ gst_elementfactory_add_padtemplate (factory, passthrough_sink_factory ());
+
+ gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+
+ return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+ GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "passthrough",
+ plugin_init
+};
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