4 extern gboolean _gst_plugin_spew;
6 void spectrum_chain(GstPad *pad,GstData *_data);
7 gboolean idle_func(gpointer data);
9 GtkWidget *drawingarea;
11 int main(int argc,char *argv[]) {
13 GstElementFactory *srcfactory;
15 GstElementFactory *spectrumfactory;
21 _gst_plugin_spew = TRUE;
23 gst_init(&argc,&argv);
24 gnome_init("Spectrum","0.0.1",argc,argv);
26 bin = gst_bin_new("bin");
28 srcfactory = gst_element_factory_find("osssrc");
29 spectrumfactory = gst_element_factory_find("gstspectrum");
31 src = gst_element_factory_create(srcfactory,"src");
32 gtk_object_set(GTK_OBJECT(src),"bytes_per_read",(gulong)1024,NULL);
33 spectrum = gst_element_factory_create(spectrumfactory,"spectrum");
34 gtk_object_set(GTK_OBJECT(spectrum),"width",256,NULL);
37 gst_bin_add(GST_BIN(bin),GST_ELEMENT(src));
38 gst_bin_add(GST_BIN(bin),GST_ELEMENT(spectrum));
40 gst_pad_connect(gst_element_get_pad(src,"src"),
41 gst_element_get_pad(spectrum,"sink"));
43 spectrumpad = gst_pad_new("sink",GST_PAD_SINK);
44 gst_pad_set_chain_function(spectrumpad,spectrum_chain);
46 gst_pad_connect(gst_element_get_pad(spectrum,"src"),spectrumpad);
48 appwindow = gnome_app_new("spectrum","Spectrum");
49 drawingarea = gtk_drawing_area_new();
50 gtk_drawing_area_size(GTK_DRAWING_AREA(drawingarea),256,32);
51 gnome_app_set_contents(GNOME_APP(appwindow),drawingarea);
52 gtk_widget_show_all(appwindow);
54 gst_element_set_state(GST_ELEMENT(bin),GST_STATE_READY);
55 gst_element_set_state(GST_ELEMENT(bin),GST_STATE_PLAYING);
57 g_idle_add(idle_func,src);
65 void spectrum_chain(GstPad *pad,GstData *_data) {
66 GstBuffer *buf = GST_BUFFER (_data);
68 guchar *data = buf->data;
70 gdk_draw_rectangle(drawingarea->window,drawingarea->style->black_gc,
71 TRUE,0,0,GST_BUFFER_SIZE(buf),25);
72 for (i=0;i<GST_BUFFER_SIZE(buf);i++) {
73 gdk_draw_rectangle(drawingarea->window,drawingarea->style->white_gc,
74 TRUE,i,32-data[i],1,data[i]);
76 gst_buffer_unref(buf);
79 gboolean idle_func(gpointer data) {
80 /*gst_src_push(GST_SRC(data)); */