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-rw-r--r--ext/smoothwave/Makefile.am11
-rw-r--r--ext/smoothwave/README6
-rw-r--r--ext/smoothwave/gstsmoothwave.c301
-rw-r--r--ext/smoothwave/gstsmoothwave.h71
4 files changed, 389 insertions, 0 deletions
diff --git a/ext/smoothwave/Makefile.am b/ext/smoothwave/Makefile.am
new file mode 100644
index 00000000..f000c7a4
--- /dev/null
+++ b/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
diff --git a/ext/smoothwave/README b/ext/smoothwave/README
new file mode 100644
index 00000000..ff737852
--- /dev/null
+++ b/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.
diff --git a/ext/smoothwave/gstsmoothwave.c b/ext/smoothwave/gstsmoothwave.c
new file mode 100644
index 00000000..befdba1d
--- /dev/null
+++ b/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
+};
diff --git a/ext/smoothwave/gstsmoothwave.h b/ext/smoothwave/gstsmoothwave.h
new file mode 100644
index 00000000..3f430097
--- /dev/null
+++ b/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__ */
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-01 10:03:05 +0000