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Original commit message from CVS: 2005-07-04 Andy Wingo <wingo@pobox.com> * examples/level/: * examples/level/Makefile.am: * examples/level/README: * examples/level/demo.c: * examples/level/plot.c: Examples moved out of the source dir. Not updated tho. * configure.ac: Add level to the build. * gst/level/Makefile.am: * gst/level/gstlevel.h: * gst/level/gstlevel.c: Cleaned up, ported to 0.9.
155 lines
4.5 KiB
C
155 lines
4.5 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* demo.c: sample application to display VU meter-like output of level
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* Copyright (C) 2003
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* Thomas Vander Stichele <thomas at apestaart dot org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <gtk/gtk.h>
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/* global array for the scale widgets, we'll assume stereo */
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GtkWidget *elapsed;
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GtkWidget *scale[2][3];
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static void
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level_callback (GstElement * element, gdouble time, gint channel,
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gdouble rms, gdouble peak, gdouble decay)
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{
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gchar *label;
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label = g_strdup_printf ("%.3f", time);
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gtk_label_set (GTK_LABEL (elapsed), label);
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g_free (label);
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gtk_range_set_value (GTK_RANGE (scale[channel][0]), rms);
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gtk_range_set_value (GTK_RANGE (scale[channel][1]), peak);
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gtk_range_set_value (GTK_RANGE (scale[channel][2]), decay);
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}
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static gboolean
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idler (gpointer data)
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{
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GstElement *pipeline = GST_ELEMENT (data);
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g_print ("+");
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if (gst_bin_iterate (GST_BIN (pipeline)))
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return TRUE;
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gtk_main_quit ();
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return FALSE;
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}
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static void
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setup_gui ()
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{
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GtkWidget *window;
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GtkWidget *vbox;
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GtkWidget *label, *hbox;
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int c;
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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g_signal_connect (window, "destroy", gtk_main_quit, NULL);
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vbox = gtk_vbox_new (TRUE, 0);
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gtk_container_add (GTK_CONTAINER (window), vbox);
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/* elapsed widget */
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hbox = gtk_hbox_new (TRUE, 0);
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label = gtk_label_new ("Elapsed");
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elapsed = gtk_label_new ("0.000");
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gtk_container_add (GTK_CONTAINER (hbox), label);
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gtk_container_add (GTK_CONTAINER (hbox), elapsed);
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gtk_container_add (GTK_CONTAINER (vbox), hbox);
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for (c = 0; c < 2; ++c) {
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/* RMS */
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hbox = gtk_hbox_new (TRUE, 0);
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label = gtk_label_new ("RMS");
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gtk_container_add (GTK_CONTAINER (hbox), label);
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scale[c][0] = gtk_hscale_new_with_range (-90.0, 0.0, 0.2);
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gtk_widget_set_size_request (scale[c][0], 100, -1);
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gtk_container_add (GTK_CONTAINER (hbox), scale[c][0]);
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gtk_container_add (GTK_CONTAINER (vbox), hbox);
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/* peak */
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hbox = gtk_hbox_new (TRUE, 0);
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label = gtk_label_new ("peak");
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gtk_container_add (GTK_CONTAINER (hbox), label);
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scale[c][1] = gtk_hscale_new_with_range (-90.0, 0.0, 0.2);
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gtk_widget_set_size_request (scale[c][1], 100, -1);
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gtk_container_add (GTK_CONTAINER (hbox), scale[c][1]);
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gtk_container_add (GTK_CONTAINER (vbox), hbox);
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/* decay */
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hbox = gtk_hbox_new (TRUE, 0);
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label = gtk_label_new ("decaying peek");
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gtk_container_add (GTK_CONTAINER (hbox), label);
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scale[c][2] = gtk_hscale_new_with_range (-90.0, 0.0, 0.2);
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gtk_widget_set_size_request (scale[c][2], 100, -1);
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gtk_container_add (GTK_CONTAINER (hbox), scale[c][2]);
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gtk_container_add (GTK_CONTAINER (vbox), hbox);
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}
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gtk_widget_show_all (GTK_WIDGET (window));
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}
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int
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main (int argc, char *argv[])
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{
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GstElement *pipeline = NULL;
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GError *error = NULL;
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GstElement *level;
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gst_init (&argc, &argv);
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gtk_init (&argc, &argv);
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pipeline = gst_parse_launchv ((const gchar **) &argv[1], &error);
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if (error) {
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g_print ("pipeline could not be constructed: %s\n", error->message);
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g_print ("Please give a complete pipeline with a 'level' element.\n");
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g_print ("Example: sinesrc ! level ! %s\n", DEFAULT_AUDIOSINK);
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g_error_free (error);
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return 1;
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}
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level = gst_bin_get_by_name (GST_BIN (pipeline), "level0");
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if (level == NULL) {
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g_print ("Please give a pipeline with a 'level' element in it\n");
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return 1;
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}
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g_object_set (level, "signal", TRUE, NULL);
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g_signal_connect (level, "level", G_CALLBACK (level_callback), NULL);
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/* setup GUI */
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setup_gui ();
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/* connect level signal */
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/* go to main loop */
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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g_idle_add (idler, pipeline);
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gtk_main ();
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return 0;
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}
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