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