mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-27 18:50:48 +00:00
cff0b179d3
The "message" property has been replaced by "post-messages". Pre-patch output: (test_spectrum:23101): GLib-GObject-WARNING **: g_object_set_valist: object class `GstSpectrum' has no property named `message' New spectrum message, endtime 0:00:00.100000000 (test_spectrum:23101): GStreamer-CRITICAL **: gst_value_list_get_value: assertion `GST_VALUE_HOLDS_LIST (value)' failed [...] Post-patch: New spectrum message, endtime 0:00:00.100000000 band 0 (freq 400): magnitude -65.988777 dB phase 1.533397 band 1 (freq 1200): magnitude -65.545563 dB phase -0.780900 band 2 (freq 2000): magnitude -64.791946 dB phase -0.799611 band 3 (freq 2800): magnitude -64.556175 dB phase -0.063615 [...] https://bugzilla.gnome.org/show_bug.cgi?id=704179
124 lines
3.8 KiB
C
124 lines
3.8 KiB
C
/* GStreamer
|
|
* Copyright (C) 2006 Stefan Kost <ensonic@users.sf.net>
|
|
* Copyright (C) 2008 Jan Schmidt <jan.schmidt@sun.com>
|
|
*
|
|
* 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., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <gst/gst.h>
|
|
|
|
static guint spect_bands = 20;
|
|
|
|
#define AUDIOFREQ 32000
|
|
|
|
/* receive spectral data from element message */
|
|
static gboolean
|
|
message_handler (GstBus * bus, GstMessage * message, gpointer data)
|
|
{
|
|
if (message->type == GST_MESSAGE_ELEMENT) {
|
|
const GstStructure *s = gst_message_get_structure (message);
|
|
const gchar *name = gst_structure_get_name (s);
|
|
GstClockTime endtime;
|
|
|
|
if (strcmp (name, "spectrum") == 0) {
|
|
const GValue *magnitudes;
|
|
const GValue *phases;
|
|
const GValue *mag, *phase;
|
|
gdouble freq;
|
|
guint i;
|
|
|
|
if (!gst_structure_get_clock_time (s, "endtime", &endtime))
|
|
endtime = GST_CLOCK_TIME_NONE;
|
|
|
|
g_print ("New spectrum message, endtime %" GST_TIME_FORMAT "\n",
|
|
GST_TIME_ARGS (endtime));
|
|
|
|
magnitudes = gst_structure_get_value (s, "magnitude");
|
|
phases = gst_structure_get_value (s, "phase");
|
|
|
|
for (i = 0; i < spect_bands; ++i) {
|
|
freq = (gdouble) ((AUDIOFREQ / 2) * i + AUDIOFREQ / 4) / spect_bands;
|
|
mag = gst_value_list_get_value (magnitudes, i);
|
|
phase = gst_value_list_get_value (phases, i);
|
|
|
|
if (mag != NULL && phase != NULL) {
|
|
g_print ("band %d (freq %g): magnitude %f dB phase %f\n", i, freq,
|
|
g_value_get_float (mag), g_value_get_float (phase));
|
|
}
|
|
}
|
|
g_print ("\n");
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
int
|
|
main (int argc, char *argv[])
|
|
{
|
|
GstElement *bin;
|
|
GstElement *src, *audioconvert, *spectrum, *sink;
|
|
GstBus *bus;
|
|
GstCaps *caps;
|
|
GMainLoop *loop;
|
|
|
|
gst_init (&argc, &argv);
|
|
|
|
bin = gst_pipeline_new ("bin");
|
|
|
|
src = gst_element_factory_make ("audiotestsrc", "src");
|
|
g_object_set (G_OBJECT (src), "wave", 0, "freq", 6000.0, NULL);
|
|
audioconvert = gst_element_factory_make ("audioconvert", NULL);
|
|
g_assert (audioconvert);
|
|
|
|
spectrum = gst_element_factory_make ("spectrum", "spectrum");
|
|
g_object_set (G_OBJECT (spectrum), "bands", spect_bands, "threshold", -80,
|
|
"post-messages", TRUE, "message-phase", TRUE, NULL);
|
|
|
|
sink = gst_element_factory_make ("fakesink", "sink");
|
|
g_object_set (G_OBJECT (sink), "sync", TRUE, NULL);
|
|
|
|
gst_bin_add_many (GST_BIN (bin), src, audioconvert, spectrum, sink, NULL);
|
|
|
|
caps = gst_caps_new_simple ("audio/x-raw",
|
|
"rate", G_TYPE_INT, AUDIOFREQ, NULL);
|
|
|
|
if (!gst_element_link (src, audioconvert) ||
|
|
!gst_element_link_filtered (audioconvert, spectrum, caps) ||
|
|
!gst_element_link (spectrum, sink)) {
|
|
fprintf (stderr, "can't link elements\n");
|
|
exit (1);
|
|
}
|
|
gst_caps_unref (caps);
|
|
|
|
bus = gst_element_get_bus (bin);
|
|
gst_bus_add_watch (bus, message_handler, NULL);
|
|
gst_object_unref (bus);
|
|
|
|
gst_element_set_state (bin, GST_STATE_PLAYING);
|
|
|
|
/* we need to run a GLib main loop to get the messages */
|
|
loop = g_main_loop_new (NULL, FALSE);
|
|
g_main_loop_run (loop);
|
|
|
|
gst_element_set_state (bin, GST_STATE_NULL);
|
|
|
|
gst_object_unref (bin);
|
|
|
|
return 0;
|
|
}
|