mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-24 18:51:11 +00:00
77a7c4c8fb
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.
123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
/* 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;
|
|
}
|