/* GStreamer * Copyright (C) <1999> Erik Walthinsen * * 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. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "gstsmoothwave.h" static GstElementDetails gst_smoothwave_details = GST_ELEMENT_DETAILS ("Smooth waveform", "Visualization", "Fading grayscale waveform display", "Erik Walthinsen "); /* SmoothWave signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0, ARG_WIDTH, ARG_HEIGHT, ARG_WIDGET, }; static void gst_smoothwave_base_init (gpointer g_class); 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, GstData * _data); 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), gst_smoothwave_base_init, 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_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_set_details (element_class, &gst_smoothwave_details); } 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 ("creating palette"); */ for (i = 0; i < 256; i++) palette[i] = (i << 16) || (i << 8); /* GST_DEBUG ("creating cmap"); */ smoothwave->cmap = gdk_rgb_cmap_new (palette, 256); /* GST_DEBUG ("created cmap"); */ /* 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, GstData * _data) { GstBuffer *buf = GST_BUFFER (_data); 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 0 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 */ } #endif /* 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 ("traversing %d",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); ptr++; } else { ptr++; } } /* GST_DEBUG ("drawing"); */ /* GST_DEBUG ("gdk_draw_indexed_image(%p,%p,%d,%d,%d,%d,%s,%p,%d,%p);", 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 (GstPlugin * plugin) { if (!gst_element_register (plugin, "smoothwave", GST_RANK_NONE, GST_TYPE_SMOOTHWAVE)) return FALSE; return TRUE; } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "smoothwave", "Fading greyscale waveform display", plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN)