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