gstreamer/gst/autodetect/gstautoaudiosink.c
2019-05-13 10:24:40 -04:00

143 lines
4.4 KiB
C

/* GStreamer
* (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* (c) 2006 Jan Schmidt <thaytan@noraisin.net>
*
* 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.
*/
/**
* SECTION:element-autoaudiosink
* @title: autoaudiosink
* @see_also: autovideosink, alsasink, osssink
*
* autoaudiosink is an audio sink that automatically detects an appropriate
* audio sink to use. It does so by scanning the registry for all elements
* that have <quote>Sink</quote> and <quote>Audio</quote> in the class field
* of their element information, and also have a non-zero autoplugging rank.
*
* ## Example launch line
* |[
* gst-launch-1.0 -v -m audiotestsrc ! audioconvert ! audioresample ! autoaudiosink
* ]|
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstautoaudiosink.h"
#define DEFAULT_TS_OFFSET 0
/* Properties */
enum
{
PROP_0,
PROP_TS_OFFSET,
};
static void gst_auto_audio_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_auto_audio_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_auto_audio_sink_configure (GstAutoDetect * autodetect,
GstElement * kid);
G_DEFINE_TYPE (GstAutoAudioSink, gst_auto_audio_sink, GST_TYPE_AUTO_DETECT);
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static void
gst_auto_audio_sink_class_init (GstAutoAudioSinkClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
GstAutoDetectClass *aklass = GST_AUTO_DETECT_CLASS (klass);
gobject_class->set_property = gst_auto_audio_sink_set_property;
gobject_class->get_property = gst_auto_audio_sink_get_property;
aklass->configure = gst_auto_audio_sink_configure;
g_object_class_install_property (gobject_class, PROP_TS_OFFSET,
g_param_spec_int64 ("ts-offset", "TS Offset",
"Timestamp offset in nanoseconds", G_MININT64, G_MAXINT64,
DEFAULT_TS_OFFSET, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_add_static_pad_template (eklass, &sink_template);
gst_element_class_set_static_metadata (eklass, "Auto audio sink",
"Sink/Audio",
"Wrapper audio sink for automatically detected audio sink",
"Jan Schmidt <thaytan@noraisin.net>");
}
static void
gst_auto_audio_sink_init (GstAutoAudioSink * sink)
{
GstAutoDetect *autodetect = GST_AUTO_DETECT (sink);
autodetect->media_klass = "Audio";
autodetect->flag = GST_ELEMENT_FLAG_SINK;
sink->ts_offset = DEFAULT_TS_OFFSET;
}
static void
gst_auto_audio_sink_configure (GstAutoDetect * autodetect, GstElement * kid)
{
GstAutoAudioSink *self = GST_AUTO_AUDIO_SINK (autodetect);
g_object_set (G_OBJECT (kid), "ts-offset", self->ts_offset, NULL);
}
static void
gst_auto_audio_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAutoAudioSink *sink = GST_AUTO_AUDIO_SINK (object);
GstAutoDetect *autodetect = (GstAutoDetect *) sink;
switch (prop_id) {
case PROP_TS_OFFSET:
sink->ts_offset = g_value_get_int64 (value);
if (autodetect->kid)
g_object_set_property (G_OBJECT (autodetect->kid), pspec->name, value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_auto_audio_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstAutoAudioSink *sink = GST_AUTO_AUDIO_SINK (object);
switch (prop_id) {
case PROP_TS_OFFSET:
g_value_set_int64 (value, sink->ts_offset);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}