#include <gnome.h> #include <gst/gst.h> extern gboolean _gst_plugin_spew; void spectrum_chain(GstPad *pad,GstBuffer *buf); gboolean idle_func(gpointer data); GtkWidget *drawingarea; int main(int argc,char *argv[]) { GstElement *bin; GstElementFactory *srcfactory; GstElement *src; GstElementFactory *spectrumfactory; GstElement *spectrum; GstPad *spectrumpad; GtkWidget *appwindow; _gst_plugin_spew = TRUE; gst_init(&argc,&argv); gst_plugin_load("libgstspectrum.so"); gnome_init("Spectrum","0.0.1",argc,argv); bin = gst_bin_new("bin"); srcfactory = gst_elementfactory_find("osssrc"); spectrumfactory = gst_elementfactory_find("gstspectrum"); src = gst_elementfactory_create(srcfactory,"src"); gtk_object_set(GTK_OBJECT(src),"bytes_per_read",(gulong)1024,NULL); spectrum = gst_elementfactory_create(spectrumfactory,"spectrum"); gtk_object_set(GTK_OBJECT(spectrum),"width",256,NULL); gst_bin_add(GST_BIN(bin),GST_ELEMENT(src)); gst_bin_add(GST_BIN(bin),GST_ELEMENT(spectrum)); gst_pad_connect(gst_element_get_pad(src,"src"), gst_element_get_pad(spectrum,"sink")); spectrumpad = gst_pad_new("sink",GST_PAD_SINK); gst_pad_set_chain_function(spectrumpad,spectrum_chain); gst_pad_connect(gst_element_get_pad(spectrum,"src"),spectrumpad); appwindow = gnome_app_new("spectrum","Spectrum"); drawingarea = gtk_drawing_area_new(); gtk_drawing_area_size(GTK_DRAWING_AREA(drawingarea),256,32); gnome_app_set_contents(GNOME_APP(appwindow),drawingarea); gtk_widget_show_all(appwindow); gst_element_set_state(GST_ELEMENT(bin),GST_STATE_READY); gst_element_set_state(GST_ELEMENT(bin),GST_STATE_PLAYING); g_idle_add(idle_func,src); gtk_main(); return 0; } void spectrum_chain(GstPad *pad,GstBuffer *buf) { gint i; guchar *data = buf->data; gdk_draw_rectangle(drawingarea->window,drawingarea->style->black_gc, TRUE,0,0,GST_BUFFER_SIZE(buf),25); for (i=0;i<GST_BUFFER_SIZE(buf);i++) { gdk_draw_rectangle(drawingarea->window,drawingarea->style->white_gc, TRUE,i,32-data[i],1,data[i]); } gst_buffer_unref(buf); } gboolean idle_func(gpointer data) { //gst_src_push(GST_SRC(data)); return TRUE; }