gstreamer/examples/level/demo.c

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* demo.c: sample application to display VU meter-like output of level
* Copyright (C) 2003
* Thomas Vander Stichele <thomas at apestaart dot org>
*
* 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 <gst/gst.h>
#include <gtk/gtk.h>
/* global array for the scale widgets, we'll assume stereo */
GtkWidget *elapsed;
GtkWidget *scale[2][3];
static void
level_callback (GstElement * element, gdouble time, gint channel,
gdouble rms, gdouble peak, gdouble decay)
{
gchar *label;
label = g_strdup_printf ("%.3f", time);
gtk_label_set (GTK_LABEL (elapsed), label);
g_free (label);
gtk_range_set_value (GTK_RANGE (scale[channel][0]), rms);
gtk_range_set_value (GTK_RANGE (scale[channel][1]), peak);
gtk_range_set_value (GTK_RANGE (scale[channel][2]), decay);
}
static gboolean
idler (gpointer data)
{
GstElement *pipeline = GST_ELEMENT (data);
g_print ("+");
if (gst_bin_iterate (GST_BIN (pipeline)))
return TRUE;
gtk_main_quit ();
return FALSE;
}
static void
setup_gui ()
{
GtkWidget *window;
GtkWidget *vbox;
GtkWidget *label, *hbox;
int c;
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
g_signal_connect (window, "destroy", gtk_main_quit, NULL);
vbox = gtk_vbox_new (TRUE, 0);
gtk_container_add (GTK_CONTAINER (window), vbox);
/* elapsed widget */
hbox = gtk_hbox_new (TRUE, 0);
label = gtk_label_new ("Elapsed");
elapsed = gtk_label_new ("0.000");
gtk_container_add (GTK_CONTAINER (hbox), label);
gtk_container_add (GTK_CONTAINER (hbox), elapsed);
gtk_container_add (GTK_CONTAINER (vbox), hbox);
for (c = 0; c < 2; ++c) {
/* RMS */
hbox = gtk_hbox_new (TRUE, 0);
label = gtk_label_new ("RMS");
gtk_container_add (GTK_CONTAINER (hbox), label);
scale[c][0] = gtk_hscale_new_with_range (-90.0, 0.0, 0.2);
gtk_widget_set_size_request (scale[c][0], 100, -1);
gtk_container_add (GTK_CONTAINER (hbox), scale[c][0]);
gtk_container_add (GTK_CONTAINER (vbox), hbox);
/* peak */
hbox = gtk_hbox_new (TRUE, 0);
label = gtk_label_new ("peak");
gtk_container_add (GTK_CONTAINER (hbox), label);
scale[c][1] = gtk_hscale_new_with_range (-90.0, 0.0, 0.2);
gtk_widget_set_size_request (scale[c][1], 100, -1);
gtk_container_add (GTK_CONTAINER (hbox), scale[c][1]);
gtk_container_add (GTK_CONTAINER (vbox), hbox);
/* decay */
hbox = gtk_hbox_new (TRUE, 0);
label = gtk_label_new ("decaying peek");
gtk_container_add (GTK_CONTAINER (hbox), label);
scale[c][2] = gtk_hscale_new_with_range (-90.0, 0.0, 0.2);
gtk_widget_set_size_request (scale[c][2], 100, -1);
gtk_container_add (GTK_CONTAINER (hbox), scale[c][2]);
gtk_container_add (GTK_CONTAINER (vbox), hbox);
}
gtk_widget_show_all (GTK_WIDGET (window));
}
int
main (int argc, char *argv[])
{
GstElement *pipeline = NULL;
GError *error = NULL;
GstElement *level;
gst_init (&argc, &argv);
gtk_init (&argc, &argv);
pipeline = gst_parse_launchv ((const gchar **) &argv[1], &error);
if (error) {
g_print ("pipeline could not be constructed: %s\n", error->message);
g_print ("Please give a complete pipeline with a 'level' element.\n");
configure.ac: Put DEFAULT_AUDIOSINK in config.h and use whereever possible. (Fixes #165997) Original commit message from CVS: * configure.ac: Put DEFAULT_AUDIOSINK in config.h and use whereever possible. (Fixes #165997) * examples/capsfilter/capsfilter1.c: (main): * examples/dynparams/filter.c: (create_ui): * examples/seeking/cdparanoia.c: (get_track_info), (main): * examples/seeking/chained.c: (main): * examples/seeking/seek.c: (make_mod_pipeline), (make_dv_pipeline), (make_wav_pipeline), (make_flac_pipeline), (make_sid_pipeline), (make_vorbis_pipeline), (make_mp3_pipeline), (make_avi_pipeline), (make_mpeg_pipeline), (make_mpegnt_pipeline): * examples/seeking/spider_seek.c: (make_spider_pipeline): * examples/switch/switcher.c: (main): * ext/dv/demo-play.c: (main): * ext/faad/gstfaad.c: (gst_faad_change_state): * ext/mad/gstmad.c: (gst_mad_chain): * ext/smoothwave/demo-osssrc.c: (main): * gst-libs/gst/gconf/gconf.c: (gst_gconf_set_string), (gst_gconf_render_bin_from_description), (gst_gconf_get_default_audio_sink), (gst_gconf_get_default_video_sink), (gst_gconf_get_default_audio_src), (gst_gconf_get_default_video_src), (gst_gconf_get_default_visualization_element): * gst/level/demo.c: (main): * gst/level/plot.c: (main): * gst/playback/gstplaybin.c: (gen_video_element), (gen_audio_element): * gst/playback/test.c: (gen_video_element), (gen_audio_element): * gst/playondemand/demo-mp3.c: (setup_pipeline): * gst/sine/demo-dparams.c: (main): * gst/spectrum/demo-osssrc.c: (main): * gst/speed/demo-mp3.c: (main): * gst/volume/demo.c: (main): * testsuite/embed/embed.c: (main):
2005-02-02 08:14:01 +00:00
g_print ("Example: sinesrc ! level ! %s\n", DEFAULT_AUDIOSINK);
g_error_free (error);
return 1;
}
level = gst_bin_get_by_name (GST_BIN (pipeline), "level0");
if (level == NULL) {
g_print ("Please give a pipeline with a 'level' element in it\n");
return 1;
}
g_object_set (level, "signal", TRUE, NULL);
g_signal_connect (level, "level", G_CALLBACK (level_callback), NULL);
/* setup GUI */
setup_gui ();
/* connect level signal */
/* go to main loop */
gst_element_set_state (pipeline, GST_STATE_PLAYING);
g_idle_add (idler, pipeline);
gtk_main ();
return 0;
}