Initial revision

Original commit message from CVS:
Initial revision

5 files changed, 489 insertions, 0 deletions

diff --git a/gst/passthrough/.gitignore b/gst/passthrough/.gitignore
new file mode 100644
index 00000000..08f5ed37
--- /dev/null
+++ b/gst/passthrough/.gitignore
@@ -0,0 +1,7 @@
+Makefile
+Makefile.in
+*.o
+*.lo
+*.la
+.deps
+.libs
diff --git a/gst/passthrough/Makefile.am b/gst/passthrough/Makefile.am
new file mode 100644
index 00000000..500d4679
--- /dev/null
+++ b/gst/passthrough/Makefile.am
@@ -0,0 +1,10 @@
+filterdir = $(libdir)/gst
+
+filter_LTLIBRARIES = libgstpassthrough.la
+
+libgstpassthrough_la_SOURCES = gstpassthrough.c
+libgstpassthrough_la_CFLAGS = $(GST_CFLAGS)
+
+noinst_HEADERS = gstpassthrough.h filter.func
+
+EXTRA_DIST = 
diff --git a/gst/passthrough/filter.func b/gst/passthrough/filter.func
new file mode 100644
index 00000000..99a9308b
--- /dev/null
+++ b/gst/passthrough/filter.func
@@ -0,0 +1,18 @@
+{
+  guint j;
+  static long int sample = 0;	/* you can use this to count samples */
+
+  /*
+   * process data here  
+   * *data contains the original 8 or 16 bit samples and is modified in place
+   * channels are interleaved in input data
+   */
+  
+  /* do nothing */
+  
+  for (j = 0; j < num_samples; j++) 
+  {
+     data[j] = data[j];
+  }
+  sample += num_samples;
+}
diff --git a/gst/passthrough/gstpassthrough.c b/gst/passthrough/gstpassthrough.c
new file mode 100644
index 00000000..dc50e626
--- /dev/null
+++ b/gst/passthrough/gstpassthrough.c
@@ -0,0 +1,351 @@
+/* -*- 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
+};
diff --git a/gst/passthrough/gstpassthrough.h b/gst/passthrough/gstpassthrough.h
new file mode 100644
index 00000000..d8c2f63e
--- /dev/null
+++ b/gst/passthrough/gstpassthrough.h
@@ -0,0 +1,103 @@
+/* -*- c-basic-offset: 2 -*-
+ * GStreamer
+ * 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.
+ */
+
+
+#ifndef __GST_PASSTHROUGH_H__
+#define __GST_PASSTHROUGH_H__
+
+
+#include <config.h>
+#include <gst/gst.h>
+// #include <gst/meta/audioraw.h>
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+#define GST_TYPE_PASSTHROUGH \
+  (gst_passthrough_get_type())
+#define GST_PASSTHROUGH(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PASSTHROUGH,GstPassthrough))
+#define GST_PASSTHROUGH_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ULAW,GstPassthrough))
+#define GST_IS_PASSTHROUGH(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_PASSTHROUGH))
+#define GST_IS_PASSTHROUGH_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_PASSTHROUGH))
+
+typedef struct _GstPassthrough GstPassthrough;
+typedef struct _GstPassthroughClass GstPassthroughClass;
+typedef enum _GstPassthroughFormat GstPassthroughFormat;
+
+enum _GstPassthroughFormat {
+  GST_PASSTHROUGH_FORMAT_INT,
+  GST_PASSTHROUGH_FORMAT_FLOAT
+};
+
+struct _GstPassthrough {
+  GstElement element;
+
+  GstPad *sinkpad, *srcpad;
+
+  gboolean silent;
+  
+  /* the next three are valid for both int and float */
+  
+  GstPassthroughFormat format;
+  
+  guint rate;
+  
+  guint channels;
+  
+  /* the next five are valid only for format==GST_PASSTHROUGH_FORMAT_INT */
+  
+  guint width;
+  
+  guint depth;
+
+  guint endianness;
+  
+  guint law;
+  
+  gboolean is_signed;
+  
+  /* the next three are valid only for format==GST_PASSTHROUGH_FORMAT_FLOAT */
+  
+  const gchar *layout;
+  
+  gfloat slope;
+  
+  gfloat intercept;
+};
+
+struct _GstPassthroughClass {
+  GstElementClass parent_class;
+};
+
+GType gst_passthrough_get_type(void);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+#endif /* __GST_PASSTHROUGH_H__ */