mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-01 06:01:04 +00:00
584c231629
Original commit message from CVS: * gst/spectrum/demo-osssrc.c: (draw_spectrum), (main): Use more defines * gst/spectrum/gstspectrum.c: (gst_spectrum_init), (gst_spectrum_dispose), (gst_spectrum_set_caps), (gst_spectrum_transform_ip): * gst/spectrum/gstspectrum.h: Apply some of the spectrum cleanup changes suggested in #348085.
136 lines
3.9 KiB
C
136 lines
3.9 KiB
C
/* GStreamer
|
|
* Copyright (C) 2006 Stefan Kost <ensonic@users.sf.net>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
#include <string.h>
|
|
#include <math.h>
|
|
#include <gst/gst.h>
|
|
#include <gtk/gtk.h>
|
|
|
|
#define DEFAULT_AUDIOSRC "alsasrc"
|
|
#define SPECT_BANDS 256
|
|
#define SPECT_WIDTH (SPECT_BANDS)
|
|
#define SPECT_HEIGHT 64
|
|
|
|
static GtkWidget *drawingarea = NULL;
|
|
|
|
static void
|
|
on_window_destroy (GtkObject * object, gpointer user_data)
|
|
{
|
|
drawingarea = NULL;
|
|
gtk_main_quit ();
|
|
}
|
|
|
|
/* draw frequency spectrum as a bunch of bars */
|
|
static void
|
|
draw_spectrum (guchar * data)
|
|
{
|
|
gint i;
|
|
GdkRectangle rect = { 0, 0, SPECT_WIDTH, SPECT_HEIGHT };
|
|
|
|
if (!drawingarea)
|
|
return;
|
|
|
|
gdk_window_begin_paint_rect (drawingarea->window, &rect);
|
|
gdk_draw_rectangle (drawingarea->window, drawingarea->style->black_gc,
|
|
TRUE, 0, 0, SPECT_BANDS, SPECT_HEIGHT);
|
|
for (i = 0; i < SPECT_BANDS; i++) {
|
|
gdk_draw_rectangle (drawingarea->window, drawingarea->style->white_gc,
|
|
TRUE, i, SPECT_HEIGHT - data[i], 1, data[i]);
|
|
}
|
|
gdk_window_end_paint (drawingarea->window);
|
|
}
|
|
|
|
/* receive spectral data from element message */
|
|
gboolean
|
|
message_handler (GstBus * bus, GstMessage * message, gpointer data)
|
|
{
|
|
if (message->type == GST_MESSAGE_ELEMENT) {
|
|
const GstStructure *s = gst_message_get_structure (message);
|
|
const gchar *name = gst_structure_get_name (s);
|
|
|
|
if (strcmp (name, "spectrum") == 0) {
|
|
guchar spect[SPECT_BANDS];
|
|
const GValue *list;
|
|
const GValue *value;
|
|
guint i;
|
|
|
|
list = gst_structure_get_value (s, "spectrum");
|
|
for (i = 0; i < SPECT_BANDS; ++i) {
|
|
value = gst_value_list_get_value (list, i);
|
|
spect[i] = g_value_get_uchar (value);
|
|
}
|
|
draw_spectrum (spect);
|
|
}
|
|
}
|
|
/* we handled the message we want, and ignored the ones we didn't want.
|
|
* so the core can unref the message for us */
|
|
return TRUE;
|
|
}
|
|
|
|
int
|
|
main (int argc, char *argv[])
|
|
{
|
|
GstElement *bin;
|
|
GstElement *src, *spectrum, *sink;
|
|
GstBus *bus;
|
|
GtkWidget *appwindow;
|
|
|
|
gst_init (&argc, &argv);
|
|
gtk_init (&argc, &argv);
|
|
|
|
bin = gst_pipeline_new ("bin");
|
|
|
|
src = gst_element_factory_make (DEFAULT_AUDIOSRC, "src");
|
|
|
|
spectrum = gst_element_factory_make ("spectrum", "spectrum");
|
|
g_object_set (G_OBJECT (spectrum), "bands", SPECT_BANDS, "threshold", -80,
|
|
"message", TRUE, NULL);
|
|
|
|
sink = gst_element_factory_make ("fakesink", "sink");
|
|
|
|
gst_bin_add_many (GST_BIN (bin), src, spectrum, sink, NULL);
|
|
if (!gst_element_link_many (src, spectrum, sink, NULL)) {
|
|
fprintf (stderr, "cant link elements\n");
|
|
exit (1);
|
|
}
|
|
|
|
bus = gst_element_get_bus (bin);
|
|
gst_bus_add_watch (bus, message_handler, NULL);
|
|
gst_object_unref (bus);
|
|
|
|
appwindow = gtk_window_new (GTK_WINDOW_TOPLEVEL);
|
|
g_signal_connect (G_OBJECT (appwindow), "destroy",
|
|
G_CALLBACK (on_window_destroy), NULL);
|
|
|
|
drawingarea = gtk_drawing_area_new ();
|
|
gtk_widget_set_size_request (drawingarea, SPECT_WIDTH, SPECT_HEIGHT);
|
|
gtk_container_add (GTK_CONTAINER (appwindow), drawingarea);
|
|
gtk_widget_show_all (appwindow);
|
|
|
|
gst_element_set_state (bin, GST_STATE_PLAYING);
|
|
gtk_main ();
|
|
gst_element_set_state (bin, GST_STATE_NULL);
|
|
|
|
gst_object_unref (bin);
|
|
|
|
return 0;
|
|
}
|