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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* plot.c: output data points to be graphed with gnuplot
* 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>
gboolean got_channel[2] = { FALSE, FALSE }; /* to see if we got the signal for this one yet */
gint channels = 0; /* guess at how many channels there are */
gdouble last_time = 0.0; /* time of last signal */
gdouble values[2][3]; /* array of levels from which to print */
static void
level_callback (GstElement * element, gdouble time, gint channel,
gdouble rms, gdouble peak, gdouble decay)
{
int i = 0, j = 0;
gboolean got_all = FALSE;
if (channel + 1 > channels)
channels = channel + 1;
/* reset got_channel if this is a new time point */
if (time > last_time) {
for (i = 0; i < channels; ++i)
got_channel[i] = FALSE;
last_time = time;
}
/* store values */
got_channel[channel] = TRUE;
values[channel][0] = rms;
values[channel][1] = peak;
values[channel][2] = decay;
/* check if we have all channels, and output if we do */
/* FIXME: this fails on the first, no ? */
got_all = TRUE;
for (i = 0; i < channels; ++i)
if (!got_channel[i])
got_all = FALSE;
if (got_all) {
g_print ("%f ", time);
for (i = 0; i < channels; ++i)
for (j = 0; j < 3; ++j)
g_print ("%f ", values[i][j]);
g_print ("\n");
}
}
static gboolean
idler (gpointer data)
{
GstElement *pipeline = GST_ELEMENT (data);
if (gst_bin_iterate (GST_BIN (pipeline)))
return TRUE;
gtk_main_quit ();
return FALSE;
}
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");
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);
/* go to main loop */
gst_element_set_state (pipeline, GST_STATE_PLAYING);
g_idle_add (idler, pipeline);
gtk_main ();
return 0;
}
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