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spectrum-demo: show the effect of fast-mode

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This commit is contained in:
Stefan Sauer 2012-02-15 11:25:45 +01:00
parent ec6b2e8659
commit dfc431dbb8
2 changed files with 52 additions and 5 deletions
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3
tests/examples/spectrum/Makefile.am
View file

@ -8,7 +8,8 @@ demo_osssrc_LDADD = $(GST_BASE_LIBS) $(GST_LIBS) $(GTK_LIBS)
demo_audiotest_SOURCES = demo-audiotest.c
demo_audiotest_CFLAGS = $(GST_BASE_CFLAGS) $(GST_CFLAGS) $(GTK_CFLAGS)
demo_audiotest_LDADD = $(GST_BASE_LIBS) $(GST_LIBS) $(GTK_LIBS)
demo_audiotest_LDADD = $(GST_BASE_LIBS) $(GST_PLUGINS_BASE_LIBS) \
-lgstfft-$(GST_MAJORMINOR) $(GST_LIBS) $(GTK_LIBS)
spectrum_example_SOURCES = spectrum-example.c
spectrum_example_CFLAGS = $(GST_BASE_CFLAGS) $(GST_CFLAGS) $(GTK_CFLAGS)

54
tests/examples/spectrum/demo-audiotest.c
View file

@ -17,6 +17,19 @@
* 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"
@ -27,6 +40,7 @@
#include <string.h>
#include <math.h>
#include <gst/gst.h>
#include <gst/fft/gstfft.h>
#include <gtk/gtk.h>
#ifndef DEFAULT_AUDIOSINK
@ -36,8 +50,10 @@
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
@ -57,21 +73,41 @@ on_frequency_changed (GtkRange * range, gpointer user_data)
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)
@ -170,7 +206,7 @@ main (int argc, char *argv[])
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);
@ -205,6 +241,16 @@ main (int argc, char *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);