* Boston, MA 02111-1307, USA.
*/
/* TODO: add wave selection */
+/* fast vs. slow mode - see update_spectrum_bands()
+ * we are still cheating below, we only draw the first spect_bands and ignore a few :/
+ *
+ * xtime gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1441 ! fakesink
+ * 2.29u 0.02s 2.14r 25504kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1441 ! fakesink
+ * 2.20u 0.05s 2.10r 25664kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1441 ! fakesink
+ * 2.23u 0.04s 2.10r 25664kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1441 ! fakesink
+ *
+ * xtime gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1440 ! fakesink
+ * 25.01u 0.08s 25.00r 25552kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1440 ! fakesink
+ * 24.96u 0.03s 24.88r 25568kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1440 ! fakesink
+ * 25.11u 0.03s 25.03r 25536kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1440 ! fakesink
+ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#include <string.h>
#include <math.h>
#include <gst/gst.h>
+#include <gst/fft/gstfft.h>
#include <gtk/gtk.h>
#ifndef DEFAULT_AUDIOSINK
static guint spect_height = 64;
static guint spect_bands = 256;
static gfloat height_scale = 1.0;
+static gboolean fast = FALSE;
static GtkWidget *drawingarea = NULL;
+static GtkWidget *bands_used = NULL;
static GstClock *sync_clock = NULL;
static void
g_object_set (machine, "freq", value, NULL);
}
+static void
+update_spectrum_bands (GstElement * spectrum)
+{
+ guint bands = spect_bands;
+ gchar str[50];
+
+ if (fast)
+ bands = ((gst_fft_next_fast_length (2 * bands - 2) + 2) / 2);
+
+ sprintf (str, "using %u bands", bands);
+
+ g_object_set (bands_used, "label", str, NULL);
+ g_object_set (G_OBJECT (spectrum), "bands", bands, NULL);
+}
+
static gboolean
on_configure_event (GtkWidget * widget, GdkEventConfigure * event,
gpointer user_data)
{
- GstElement *spectrum = GST_ELEMENT (user_data);
-
/*GST_INFO ("%d x %d", event->width, event->height); */
spect_height = event->height;
height_scale = event->height / 64.0;
spect_bands = event->width;
- g_object_set (G_OBJECT (spectrum), "bands", spect_bands, NULL);
+ update_spectrum_bands (GST_ELEMENT (user_data));
return FALSE;
}
+static void
+on_fast_slow_mode_changed (GtkToggleButton * togglebutton, gpointer user_data)
+{
+ fast = gtk_toggle_button_get_active (togglebutton);
+ update_spectrum_bands (GST_ELEMENT (user_data));
+}
+
/* draw frequency spectrum as a bunch of bars */
static void
draw_spectrum (gfloat * data)
GstElement *bin;
GstElement *src, *spectrum, *audioconvert, *sink;
GstBus *bus;
- GtkWidget *appwindow, *vbox, *widget;
+ GtkWidget *appwindow, *vbox, *hbox, *widget;
gst_init (&argc, &argv);
gtk_init (&argc, &argv);
G_CALLBACK (on_window_destroy), NULL);
vbox = gtk_vbox_new (FALSE, 6);
+ hbox = gtk_hbox_new (FALSE, 6);
+ widget = gtk_check_button_new_with_label ("Fast");
+ g_signal_connect (G_OBJECT (widget), "toggled",
+ G_CALLBACK (on_fast_slow_mode_changed), (gpointer) spectrum);
+ gtk_box_pack_start (GTK_BOX (hbox), widget, FALSE, FALSE, 0);
+ bands_used = gtk_label_new ("");
+ gtk_box_pack_start (GTK_BOX (hbox), bands_used, FALSE, FALSE, 0);
+
+ gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
+
widget = gtk_hscale_new_with_range (50.0, 20000.0, 10);
gtk_scale_set_draw_value (GTK_SCALE (widget), TRUE);
gtk_scale_set_value_pos (GTK_SCALE (widget), GTK_POS_TOP);