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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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88 lines
2.3 KiB
C
88 lines
2.3 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, GstData * _data);
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gboolean idle_func (gpointer data);
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GtkWidget *drawingarea;
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int
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main (int argc, char *argv[])
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{
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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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gnome_init ("Spectrum", "0.0.1", argc, argv);
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bin = gst_bin_new ("bin");
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srcfactory = gst_element_factory_find ("osssrc");
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spectrumfactory = gst_element_factory_find ("gstspectrum");
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src = gst_element_factory_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_element_factory_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_link (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_link (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_READY);
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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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return 0;
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}
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void
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spectrum_chain (GstPad * pad, GstData * _data)
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{
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GstBuffer *buf = GST_BUFFER (_data);
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gint i;
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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
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idle_func (gpointer data)
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{
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/*gst_src_push(GST_SRC(data)); */
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return TRUE;
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}
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