noinst_HEADERS = gstlevel.h filter.func
if HAVE_GTK
-noinst_PROGRAMS = demo
+noinst_PROGRAMS = demo plot
demo_SOURCES = demo.c
demo_CFLAGS = $(GTK_CFLAGS) $(GST_CFLAGS)
demo_LDFLAGS = $(GTK_LIBS) $(GST_LIBS)
+plot_SOURCES = plot.c
+plot_CFLAGS = $(GTK_CFLAGS) $(GST_CFLAGS)
+plot_LDFLAGS = $(GTK_LIBS) $(GST_LIBS)
endif
EXTRA_libgstlevel_la_SOURCES = gstlevel-marshal.list
level plugin by thomas <thomas@apestaart.org>
this plugin signals:
+ - running time since last EOS/start
- channel
- RMS level
- peak level
well, if separate fast chain functions are made that displaces the incoming
data to its midpoint (ie, 0,65535 should be mapped to -32768, 32767)
+There are two demo apps, apps and plot. apps will create some GTK sliders
+to display the volume. plot will output data readable by gnuplot.
+
+Here is a sample plot script to plot output of the plot command that was
+stored to plot.dat
+
+set xlabel "Seconds"
+set ylabel "dB"
+set yrange [-60:0]
+plot 'plot.dat' using 1:2 title 'L RMS' with lines, \
+ 'plot.dat' using 1:3 title 'L peak' with lines, \
+ 'plot.dat' using 1:4 title 'L decay' with lines
+
+plot 'plot.dat' using 1:5 title 'R RMS' with lines, \
+ 'plot.dat' using 1:6 title 'R peak' with lines, \
+ 'plot.dat' using 1:7 title 'R decay' with lines
+
GtkWidget *scale[2][3];
static void
-level_callback (GstElement *element, gint channel,
+level_callback (GstElement *element, gdouble time, gint channel,
gdouble rms, gdouble peak, gdouble decay)
{
gtk_range_set_value (GTK_RANGE (scale[channel][0]), rms);
{
GstElement *pipeline = GST_ELEMENT (data);
g_print ("+");
- return gst_bin_iterate (GST_BIN (pipeline));
+ if (gst_bin_iterate (GST_BIN (pipeline)))
+ return TRUE;
+ gtk_main_quit ();
+ return FALSE;
}
static void
-VOID:INT,DOUBLE,DOUBLE,DOUBLE
+VOID:DOUBLE,INT,DOUBLE,DOUBLE,DOUBLE
for (i = 0; i < filter->channels; ++i)
filter->CS[i] = filter->peak[i] = filter->MS[i] = filter->RMS_dB[i] = 0.0;
- in_data = (gint16 *) GST_BUFFER_DATA(buf);
+ in_data = (gint16 *) GST_BUFFER_DATA (buf);
num_samples = GST_BUFFER_SIZE (buf) / (filter->width / 8);
if (num_samples % filter->channels != 0)
{
if (filter->signal)
{
- gdouble RMS, peak;
+ gdouble RMS, peak, endtime;
for (i = 0; i < filter->channels; ++i)
{
RMS = sqrt (filter->CS[i] / (filter->num_samples / filter->channels));
peak = filter->last_peak[i];
+ num_samples = GST_BUFFER_SIZE (buf) / (filter->width / 8);
+ endtime = (double) GST_BUFFER_TIMESTAMP (buf) / GST_SECOND
+ + (double) num_samples / (double) filter->rate;
g_signal_emit (G_OBJECT (filter), gst_filter_signals[SIGNAL_LEVEL], 0,
- i, 20 * log10 (RMS), 20 * log10 (filter->last_peak[i]),
+ endtime, i,
+ 20 * log10 (RMS), 20 * log10 (filter->last_peak[i]),
20 * log10 (filter->decay_peak[i]));
/* we emitted, so reset cumulative and normal peak */
filter->CS[i] = 0.0;
gst_filter_signals[SIGNAL_LEVEL] =
g_signal_new ("level", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstLevelClass, level), NULL, NULL,
- gstlevel_cclosure_marshal_VOID__INT_DOUBLE_DOUBLE_DOUBLE,
- G_TYPE_NONE, 4,
- G_TYPE_INT, G_TYPE_DOUBLE, G_TYPE_DOUBLE, G_TYPE_DOUBLE);
+ gstlevel_cclosure_marshal_VOID__DOUBLE_INT_DOUBLE_DOUBLE_DOUBLE,
+ G_TYPE_NONE, 5,
+ G_TYPE_DOUBLE, G_TYPE_INT,
+ G_TYPE_DOUBLE, G_TYPE_DOUBLE, G_TYPE_DOUBLE);
}
static void
struct _GstLevelClass {
GstElementClass parent_class;
- void (*level) (GstElement *element, gint channel,
+ void (*level) (GstElement *element, gdouble time, gint channel,
gdouble RMS_dB, gdouble peak_dB, gdouble decay_peak_dB);
};
--- /dev/null
+/* 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.
+ */
+
+#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 ! osssink\n");
+ 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;
+}
+
projects / platform / upstream / gst-plugins-good.git / commitdiff