smoothwave fixin

Original commit message from CVS:
smoothwave fixin

configure.ac

@@ -1077,7 +1077,7 @@ ext/rtp/Makefile
 ext/sdl/Makefile
 ext/shout/Makefile
 ext/sidplay/Makefile
-ext/smooothwave/Makefile
+ext/smoothwave/Makefile
 ext/vorbis/Makefile
 ext/xmms/Makefile
 gst-libs/Makefile

ext/Makefile.am

@@ -161,7 +161,7 @@ SHOUT_DIR=
 endif
 
 if USE_SMOOTHWAVE
-SMOOTHWAVE_DIR=smooothwave
+SMOOTHWAVE_DIR=smoothwave
 else
 SMOOTHWAVE_DIR=
 endif

ext/smoothwave/Makefile.am

@@ -0,0 +1,11 @@
+filterdir = $(libdir)/gst
+
+filter_LTLIBRARIES = libgstsmoothwave.la
+
+libgstsmoothwave_la_SOURCES = gstsmoothwave.c
+libgstsmoothwave_la_CFLAGS = $(GST_CFLAGS) $(GTK_CFLAGS)
+libgstsmoothwave_la_LIBADD = $(GTK_LIBS)
+
+noinst_HEADERS = gstsmoothwave.h
+
+EXTRA_DIST = README

ext/smoothwave/README

@@ -0,0 +1,6 @@
+This is a home-grown visualization, with a couple lines of code copied
+from synaesthesia.  It draws the waveform in the bitmap, then fades out
+the entire bitmap so older waveforms disappear.  It looks OK, but it's
+grayscale so far (haven't solved the cmap problems, note all the commented
+out code).  I'm going to try to make a much better version as time goes
+on.

ext/smoothwave/gstsmoothwave.c

@@ -0,0 +1,301 @@
+/* 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 <string.h>
+
+#include "gstsmoothwave.h"
+
+static GstElementDetails gst_smoothwave_details = {
+  "Smooth waveform",
+  "Sink/Visualization",
+  "Fading grayscale waveform display",
+  VERSION,
+  "Erik Walthinsen <omega@cse.ogi.edu>",
+  "(C) 1999",
+};
+
+
+/* SmoothWave signals and args */
+enum {
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum {
+  ARG_0,
+  ARG_WIDTH,
+  ARG_HEIGHT,
+  ARG_WIDGET,
+};
+
+
+static void	gst_smoothwave_class_init	(GstSmoothWaveClass *klass);
+static void	gst_smoothwave_init		(GstSmoothWave *smoothwave);
+
+static void	gst_smoothwave_set_property		(GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
+static void	gst_smoothwave_get_property		(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
+
+static void	gst_smoothwave_chain		(GstPad *pad, GstBuffer *buf);
+
+static GstElementClass *parent_class = NULL;
+//static guint gst_smoothwave_signals[LAST_SIGNAL] = { 0 };
+
+
+GType
+gst_smoothwave_get_type (void)
+{
+  static GType smoothwave_type = 0;
+
+  if (!smoothwave_type) {
+    static const GTypeInfo smoothwave_info = {
+      sizeof(GstSmoothWaveClass),      NULL,
+      NULL,
+      (GClassInitFunc)gst_smoothwave_class_init,
+      NULL,
+      NULL,
+      sizeof(GstSmoothWave),
+      0,
+      (GInstanceInitFunc)gst_smoothwave_init,
+    };
+    smoothwave_type = g_type_register_static(GST_TYPE_ELEMENT, "GstSmoothWave", &smoothwave_info, 0);
+  }
+  return smoothwave_type;
+}
+
+static void
+gst_smoothwave_class_init (GstSmoothWaveClass *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_WIDTH,
+    g_param_spec_int("width","width","width",
+                     G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HEIGHT,
+    g_param_spec_int("height","height","height",
+                     G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_WIDGET,
+    g_param_spec_object("widget","widget","widget",
+                        GTK_TYPE_WIDGET,G_PARAM_READABLE)); // CHECKME!
+
+  gobject_class->set_property = gst_smoothwave_set_property;
+  gobject_class->get_property = gst_smoothwave_get_property;
+}
+
+static void
+gst_smoothwave_init (GstSmoothWave *smoothwave)
+{
+  int i;
+  guint32 palette[256];
+
+  smoothwave->sinkpad = gst_pad_new("sink",GST_PAD_SINK);
+  gst_element_add_pad(GST_ELEMENT(smoothwave),smoothwave->sinkpad);
+  gst_pad_set_chain_function(smoothwave->sinkpad,gst_smoothwave_chain);
+  smoothwave->srcpad = gst_pad_new("src",GST_PAD_SRC);
+  gst_element_add_pad(GST_ELEMENT(smoothwave),smoothwave->srcpad);
+
+//  smoothwave->meta = NULL;
+  smoothwave->width = 512;
+  smoothwave->height = 256;
+
+  gdk_rgb_init();
+//  gtk_widget_set_default_colormap (gdk_rgb_get_cmap());
+//  gtk_widget_set_default_visual (gdk_rgb_get_visual());
+
+//  GST_DEBUG (0,"creating palette\n");
+  for (i=0;i<256;i++)
+    palette[i] = (i << 16) || (i << 8);
+//  GST_DEBUG (0,"creating cmap\n");
+  smoothwave->cmap = gdk_rgb_cmap_new(palette,256);
+//  GST_DEBUG (0,"created cmap\n");
+//  gtk_widget_set_default_colormap (smoothwave->cmap);
+
+  smoothwave->image = gtk_drawing_area_new();
+  gtk_drawing_area_size(GTK_DRAWING_AREA(smoothwave->image),
+                        smoothwave->width,smoothwave->height);
+  gtk_widget_show(smoothwave->image);
+
+  smoothwave->imagebuffer = g_malloc(smoothwave->width*smoothwave->height);
+  memset(smoothwave->imagebuffer,0,smoothwave->width*smoothwave->height);
+}
+
+static void
+gst_smoothwave_chain (GstPad *pad, GstBuffer *buf)
+{
+  GstSmoothWave *smoothwave;
+  gint16 *samples;
+  gint samplecount,i;
+  register guint32 *ptr;
+  gint qheight;
+
+  g_return_if_fail(pad != NULL);
+  g_return_if_fail(GST_IS_PAD(pad));
+  g_return_if_fail(buf != NULL);
+//  g_return_if_fail(GST_IS_BUFFER(buf));
+
+  smoothwave = GST_SMOOTHWAVE(GST_OBJECT_PARENT (pad));
+
+  /* first deal with audio metadata */
+//  if (buf->meta) {
+//    if (smoothwave->meta != NULL) {
+//      /* FIXME: need to unref the old metadata so it goes away */
+//    }
+//    /* we just make a copy of the pointer */
+//    smoothwave->meta = (MetaAudioRaw *)(buf->meta);
+//    /* FIXME: now we have to ref the metadata so it doesn't go away */
+//  }
+
+//  g_return_if_fail(smoothwave->meta != NULL);
+
+  samples = (gint16 *)GST_BUFFER_DATA(buf);
+//  samplecount = buf->datasize / (smoothwave->meta->channels * sizeof(gint16));
+  samplecount = GST_BUFFER_SIZE(buf) / (2 * sizeof(gint16));
+
+  qheight = smoothwave->height/4;
+
+//  GST_DEBUG (0,"traversing %d\n",smoothwave->width);
+  for (i=0;i<MAX(smoothwave->width,samplecount);i++) {
+    gint16 y1 = (gint32)(samples[i*2] * qheight) / 32768 +
+                qheight;
+    gint16 y2 = (gint32)(samples[(i*2)+1] * qheight) / 32768 +
+                (qheight*3);
+    smoothwave->imagebuffer[y1*smoothwave->width + i] = 0xff;
+    smoothwave->imagebuffer[y2*smoothwave->width + i] = 0xff;
+//    smoothwave->imagebuffer[i+(smoothwave->width*5)] = i;
+  }
+
+  ptr = (guint32 *)smoothwave->imagebuffer;
+  for (i=0;i<(smoothwave->width*smoothwave->height)/4;i++) {
+    if (*ptr)
+      *(ptr++) -= ((*ptr & 0xf0f0f0f0ul) >> 4) + ((*ptr & 0xe0e0e0e0ul) >> 5);
+    else
+      ptr++;
+  }
+
+//  GST_DEBUG (0,"drawing\n");
+/*  GST_DEBUG (0,"gdk_draw_indexed_image(%p,%p,%d,%d,%d,%d,%s,%p,%d,%p);\n",
+        smoothwave->image->window,
+	smoothwave->image->style->fg_gc[GTK_STATE_NORMAL],
+	0,0,smoothwave->width,smoothwave->height,
+	"GDK_RGB_DITHER_NORMAL",
+	smoothwave->imagebuffer,smoothwave->width,
+	smoothwave->cmap);*/
+/*  gdk_draw_indexed_image(smoothwave->image->window,
+	smoothwave->image->style->fg_gc[GTK_STATE_NORMAL],
+	0,0,smoothwave->width,smoothwave->height,
+	GDK_RGB_DITHER_NONE,
+	smoothwave->imagebuffer,smoothwave->width,
+	smoothwave->cmap);*/
+  gdk_draw_gray_image(smoothwave->image->window,
+	smoothwave->image->style->fg_gc[GTK_STATE_NORMAL],
+	0,0,smoothwave->width,smoothwave->height,
+	GDK_RGB_DITHER_NORMAL,
+	smoothwave->imagebuffer,smoothwave->width);
+
+//  gst_trace_add_entry(NULL,0,buf,"smoothwave: calculated smoothwave");
+
+  gst_buffer_unref(buf);
+}
+
+static void
+gst_smoothwave_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+{
+  GstSmoothWave *smoothwave;
+
+  /* it's not null if we got it, but it might not be ours */
+  g_return_if_fail(GST_IS_SMOOTHWAVE(object));
+  smoothwave = GST_SMOOTHWAVE(object);
+
+  switch (prop_id) {
+    case ARG_WIDTH:
+      smoothwave->width = g_value_get_int (value);
+      gtk_drawing_area_size(GTK_DRAWING_AREA(smoothwave->image),
+                            smoothwave->width,smoothwave->height);
+      gtk_widget_set_usize(GTK_WIDGET(smoothwave->image),
+                           smoothwave->width,smoothwave->height);
+      break;
+    case ARG_HEIGHT:
+      smoothwave->height = g_value_get_int (value);
+      gtk_drawing_area_size(GTK_DRAWING_AREA(smoothwave->image),
+                            smoothwave->width,smoothwave->height);
+      gtk_widget_set_usize(GTK_WIDGET(smoothwave->image),
+                           smoothwave->width,smoothwave->height);
+      break;
+    default:
+      break;
+  }
+}
+
+static void
+gst_smoothwave_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
+{
+  GstSmoothWave *smoothwave;
+
+  /* it's not null if we got it, but it might not be ours */
+  smoothwave = GST_SMOOTHWAVE(object);
+
+  switch (prop_id) {
+    case ARG_WIDTH: {
+      g_value_set_int (value, smoothwave->width);
+      break;
+    }
+    case ARG_HEIGHT: {
+      g_value_set_int (value, smoothwave->height);
+      break;
+    }
+    case ARG_WIDGET: {
+      g_value_set_object (value, smoothwave->image);
+      break;
+    }
+    default: {
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+  }
+}
+
+
+
+static gboolean
+plugin_init (GModule *module, GstPlugin *plugin)
+{
+  GstElementFactory *factory;
+
+  /* create an elementfactory for the smoothwave element */
+  factory = gst_elementfactory_new("smoothwave",GST_TYPE_SMOOTHWAVE,
+                                   &gst_smoothwave_details);
+  g_return_val_if_fail(factory != NULL, FALSE);
+
+  gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+
+  return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+  GST_VERSION_MAJOR,
+  GST_VERSION_MINOR,
+  "smoothwave",
+  plugin_init
+};

ext/smoothwave/gstsmoothwave.h

@@ -0,0 +1,71 @@
+/* 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.
+ */
+
+
+#ifndef __GST_SMOOTHWAVE_H__
+#define __GST_SMOOTHWAVE_H__
+
+
+#include <gst/gst.h>
+#include <gtk/gtk.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+#define GST_TYPE_SMOOTHWAVE \
+  (gst_smoothwave_get_type())
+#define GST_SMOOTHWAVE(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SMOOTHWAVE,GstSmoothWave))
+#define GST_SMOOTHWAVE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SMOOTHWAVE,GstSmoothWave))
+#define GST_IS_SMOOTHWAVE(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SMOOTHWAVE))
+#define GST_IS_SMOOTHWAVE_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SMOOTHWAVE))
+
+typedef struct _GstSmoothWave GstSmoothWave;
+typedef struct _GstSmoothWaveClass GstSmoothWaveClass;
+
+struct _GstSmoothWave {
+  GstElement element;
+
+  GstPad *sinkpad,*srcpad;
+
+  gint width,height;
+
+  GdkRgbCmap *cmap;
+  GtkWidget *image;
+  guchar *imagebuffer;
+};
+
+struct _GstSmoothWaveClass {
+  GstElementClass parent_class;
+};
+
+GType gst_smoothwave_get_type(void);
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+#endif /* __GST_SMOOTHWAVE_H__ */

gst/smoothwave/Makefile.am

@@ -0,0 +1,11 @@
+filterdir = $(libdir)/gst
+
+filter_LTLIBRARIES = libgstsmoothwave.la
+
+libgstsmoothwave_la_SOURCES = gstsmoothwave.c
+libgstsmoothwave_la_CFLAGS = $(GST_CFLAGS) $(GTK_CFLAGS)
+libgstsmoothwave_la_LIBADD = $(GTK_LIBS)
+
+noinst_HEADERS = gstsmoothwave.h
+
+EXTRA_DIST = README

gst/smoothwave/README

@@ -0,0 +1,6 @@
+This is a home-grown visualization, with a couple lines of code copied
+from synaesthesia.  It draws the waveform in the bitmap, then fades out
+the entire bitmap so older waveforms disappear.  It looks OK, but it's
+grayscale so far (haven't solved the cmap problems, note all the commented
+out code).  I'm going to try to make a much better version as time goes
+on.

gst/smoothwave/gstsmoothwave.c

@@ -0,0 +1,301 @@
+/* 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 <string.h>
+
+#include "gstsmoothwave.h"
+
+static GstElementDetails gst_smoothwave_details = {
+  "Smooth waveform",
+  "Sink/Visualization",
+  "Fading grayscale waveform display",
+  VERSION,
+  "Erik Walthinsen <omega@cse.ogi.edu>",
+  "(C) 1999",
+};
+
+
+/* SmoothWave signals and args */
+enum {
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum {
+  ARG_0,
+  ARG_WIDTH,
+  ARG_HEIGHT,
+  ARG_WIDGET,
+};
+
+
+static void	gst_smoothwave_class_init	(GstSmoothWaveClass *klass);
+static void	gst_smoothwave_init		(GstSmoothWave *smoothwave);
+
+static void	gst_smoothwave_set_property		(GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
+static void	gst_smoothwave_get_property		(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
+
+static void	gst_smoothwave_chain		(GstPad *pad, GstBuffer *buf);
+
+static GstElementClass *parent_class = NULL;
+//static guint gst_smoothwave_signals[LAST_SIGNAL] = { 0 };
+
+
+GType
+gst_smoothwave_get_type (void)
+{
+  static GType smoothwave_type = 0;
+
+  if (!smoothwave_type) {
+    static const GTypeInfo smoothwave_info = {
+      sizeof(GstSmoothWaveClass),      NULL,
+      NULL,
+      (GClassInitFunc)gst_smoothwave_class_init,
+      NULL,
+      NULL,
+      sizeof(GstSmoothWave),
+      0,
+      (GInstanceInitFunc)gst_smoothwave_init,
+    };
+    smoothwave_type = g_type_register_static(GST_TYPE_ELEMENT, "GstSmoothWave", &smoothwave_info, 0);
+  }
+  return smoothwave_type;
+}
+
+static void
+gst_smoothwave_class_init (GstSmoothWaveClass *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_WIDTH,
+    g_param_spec_int("width","width","width",
+                     G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HEIGHT,
+    g_param_spec_int("height","height","height",
+                     G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_WIDGET,
+    g_param_spec_object("widget","widget","widget",
+                        GTK_TYPE_WIDGET,G_PARAM_READABLE)); // CHECKME!
+
+  gobject_class->set_property = gst_smoothwave_set_property;
+  gobject_class->get_property = gst_smoothwave_get_property;
+}
+
+static void
+gst_smoothwave_init (GstSmoothWave *smoothwave)
+{
+  int i;
+  guint32 palette[256];
+
+  smoothwave->sinkpad = gst_pad_new("sink",GST_PAD_SINK);
+  gst_element_add_pad(GST_ELEMENT(smoothwave),smoothwave->sinkpad);
+  gst_pad_set_chain_function(smoothwave->sinkpad,gst_smoothwave_chain);
+  smoothwave->srcpad = gst_pad_new("src",GST_PAD_SRC);
+  gst_element_add_pad(GST_ELEMENT(smoothwave),smoothwave->srcpad);
+
+//  smoothwave->meta = NULL;
+  smoothwave->width = 512;
+  smoothwave->height = 256;
+
+  gdk_rgb_init();
+//  gtk_widget_set_default_colormap (gdk_rgb_get_cmap());
+//  gtk_widget_set_default_visual (gdk_rgb_get_visual());
+
+//  GST_DEBUG (0,"creating palette\n");
+  for (i=0;i<256;i++)
+    palette[i] = (i << 16) || (i << 8);
+//  GST_DEBUG (0,"creating cmap\n");
+  smoothwave->cmap = gdk_rgb_cmap_new(palette,256);
+//  GST_DEBUG (0,"created cmap\n");
+//  gtk_widget_set_default_colormap (smoothwave->cmap);
+
+  smoothwave->image = gtk_drawing_area_new();
+  gtk_drawing_area_size(GTK_DRAWING_AREA(smoothwave->image),
+                        smoothwave->width,smoothwave->height);
+  gtk_widget_show(smoothwave->image);
+
+  smoothwave->imagebuffer = g_malloc(smoothwave->width*smoothwave->height);
+  memset(smoothwave->imagebuffer,0,smoothwave->width*smoothwave->height);
+}
+
+static void
+gst_smoothwave_chain (GstPad *pad, GstBuffer *buf)
+{
+  GstSmoothWave *smoothwave;
+  gint16 *samples;
+  gint samplecount,i;
+  register guint32 *ptr;
+  gint qheight;
+
+  g_return_if_fail(pad != NULL);
+  g_return_if_fail(GST_IS_PAD(pad));
+  g_return_if_fail(buf != NULL);
+//  g_return_if_fail(GST_IS_BUFFER(buf));
+
+  smoothwave = GST_SMOOTHWAVE(GST_OBJECT_PARENT (pad));
+
+  /* first deal with audio metadata */
+//  if (buf->meta) {
+//    if (smoothwave->meta != NULL) {
+//      /* FIXME: need to unref the old metadata so it goes away */
+//    }
+//    /* we just make a copy of the pointer */
+//    smoothwave->meta = (MetaAudioRaw *)(buf->meta);
+//    /* FIXME: now we have to ref the metadata so it doesn't go away */
+//  }
+
+//  g_return_if_fail(smoothwave->meta != NULL);
+
+  samples = (gint16 *)GST_BUFFER_DATA(buf);
+//  samplecount = buf->datasize / (smoothwave->meta->channels * sizeof(gint16));
+  samplecount = GST_BUFFER_SIZE(buf) / (2 * sizeof(gint16));
+
+  qheight = smoothwave->height/4;
+
+//  GST_DEBUG (0,"traversing %d\n",smoothwave->width);
+  for (i=0;i<MAX(smoothwave->width,samplecount);i++) {
+    gint16 y1 = (gint32)(samples[i*2] * qheight) / 32768 +
+                qheight;
+    gint16 y2 = (gint32)(samples[(i*2)+1] * qheight) / 32768 +
+                (qheight*3);
+    smoothwave->imagebuffer[y1*smoothwave->width + i] = 0xff;
+    smoothwave->imagebuffer[y2*smoothwave->width + i] = 0xff;
+//    smoothwave->imagebuffer[i+(smoothwave->width*5)] = i;
+  }
+
+  ptr = (guint32 *)smoothwave->imagebuffer;
+  for (i=0;i<(smoothwave->width*smoothwave->height)/4;i++) {
+    if (*ptr)
+      *(ptr++) -= ((*ptr & 0xf0f0f0f0ul) >> 4) + ((*ptr & 0xe0e0e0e0ul) >> 5);
+    else
+      ptr++;
+  }
+
+//  GST_DEBUG (0,"drawing\n");
+/*  GST_DEBUG (0,"gdk_draw_indexed_image(%p,%p,%d,%d,%d,%d,%s,%p,%d,%p);\n",
+        smoothwave->image->window,
+	smoothwave->image->style->fg_gc[GTK_STATE_NORMAL],
+	0,0,smoothwave->width,smoothwave->height,
+	"GDK_RGB_DITHER_NORMAL",
+	smoothwave->imagebuffer,smoothwave->width,
+	smoothwave->cmap);*/
+/*  gdk_draw_indexed_image(smoothwave->image->window,
+	smoothwave->image->style->fg_gc[GTK_STATE_NORMAL],
+	0,0,smoothwave->width,smoothwave->height,
+	GDK_RGB_DITHER_NONE,
+	smoothwave->imagebuffer,smoothwave->width,
+	smoothwave->cmap);*/
+  gdk_draw_gray_image(smoothwave->image->window,
+	smoothwave->image->style->fg_gc[GTK_STATE_NORMAL],
+	0,0,smoothwave->width,smoothwave->height,
+	GDK_RGB_DITHER_NORMAL,
+	smoothwave->imagebuffer,smoothwave->width);
+
+//  gst_trace_add_entry(NULL,0,buf,"smoothwave: calculated smoothwave");
+
+  gst_buffer_unref(buf);
+}
+
+static void
+gst_smoothwave_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+{
+  GstSmoothWave *smoothwave;
+
+  /* it's not null if we got it, but it might not be ours */
+  g_return_if_fail(GST_IS_SMOOTHWAVE(object));
+  smoothwave = GST_SMOOTHWAVE(object);
+
+  switch (prop_id) {
+    case ARG_WIDTH:
+      smoothwave->width = g_value_get_int (value);
+      gtk_drawing_area_size(GTK_DRAWING_AREA(smoothwave->image),
+                            smoothwave->width,smoothwave->height);
+      gtk_widget_set_usize(GTK_WIDGET(smoothwave->image),
+                           smoothwave->width,smoothwave->height);
+      break;
+    case ARG_HEIGHT:
+      smoothwave->height = g_value_get_int (value);
+      gtk_drawing_area_size(GTK_DRAWING_AREA(smoothwave->image),
+                            smoothwave->width,smoothwave->height);
+      gtk_widget_set_usize(GTK_WIDGET(smoothwave->image),
+                           smoothwave->width,smoothwave->height);
+      break;
+    default:
+      break;
+  }
+}
+
+static void
+gst_smoothwave_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
+{
+  GstSmoothWave *smoothwave;
+
+  /* it's not null if we got it, but it might not be ours */
+  smoothwave = GST_SMOOTHWAVE(object);
+
+  switch (prop_id) {
+    case ARG_WIDTH: {
+      g_value_set_int (value, smoothwave->width);
+      break;
+    }
+    case ARG_HEIGHT: {
+      g_value_set_int (value, smoothwave->height);
+      break;
+    }
+    case ARG_WIDGET: {
+      g_value_set_object (value, smoothwave->image);
+      break;
+    }
+    default: {
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+  }
+}
+
+
+
+static gboolean
+plugin_init (GModule *module, GstPlugin *plugin)
+{
+  GstElementFactory *factory;
+
+  /* create an elementfactory for the smoothwave element */
+  factory = gst_elementfactory_new("smoothwave",GST_TYPE_SMOOTHWAVE,
+                                   &gst_smoothwave_details);
+  g_return_val_if_fail(factory != NULL, FALSE);
+
+  gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+
+  return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+  GST_VERSION_MAJOR,
+  GST_VERSION_MINOR,
+  "smoothwave",
+  plugin_init
+};

gst/smoothwave/gstsmoothwave.h

@@ -0,0 +1,71 @@
+/* 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.
+ */
+
+
+#ifndef __GST_SMOOTHWAVE_H__
+#define __GST_SMOOTHWAVE_H__
+
+
+#include <gst/gst.h>
+#include <gtk/gtk.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+#define GST_TYPE_SMOOTHWAVE \
+  (gst_smoothwave_get_type())
+#define GST_SMOOTHWAVE(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SMOOTHWAVE,GstSmoothWave))
+#define GST_SMOOTHWAVE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SMOOTHWAVE,GstSmoothWave))
+#define GST_IS_SMOOTHWAVE(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SMOOTHWAVE))
+#define GST_IS_SMOOTHWAVE_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SMOOTHWAVE))
+
+typedef struct _GstSmoothWave GstSmoothWave;
+typedef struct _GstSmoothWaveClass GstSmoothWaveClass;
+
+struct _GstSmoothWave {
+  GstElement element;
+
+  GstPad *sinkpad,*srcpad;
+
+  gint width,height;
+
+  GdkRgbCmap *cmap;
+  GtkWidget *image;
+  guchar *imagebuffer;
+};
+
+struct _GstSmoothWaveClass {
+  GstElementClass parent_class;
+};
+
+GType gst_smoothwave_get_type(void);
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+#endif /* __GST_SMOOTHWAVE_H__ */