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This makes the actual elements super simple. We're using the ELEMENT_FLAG to configure source/sink and a string for the Audio/Video type.
144 lines
4.5 KiB
C
144 lines
4.5 KiB
C
/* GStreamer
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* (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
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* (c) 2006 Jan Schmidt <thaytan@noraisin.net>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-autoaudiosink
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* @see_also: autovideosink, alsasink, osssink
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*
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* autoaudiosink is an audio sink that automatically detects an appropriate
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* audio sink to use. It does so by scanning the registry for all elements
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* that have <quote>Sink</quote> and <quote>Audio</quote> in the class field
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* of their element information, and also have a non-zero autoplugging rank.
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch-1.0 -v -m audiotestsrc ! audioconvert ! audioresample ! autoaudiosink
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* ]|
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* </refsect2>
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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 "gstautoaudiosink.h"
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#define DEFAULT_TS_OFFSET 0
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/* Properties */
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enum
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{
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PROP_0,
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PROP_TS_OFFSET,
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};
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static void gst_auto_audio_sink_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_auto_audio_sink_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_auto_audio_sink_configure (GstAutoDetect * autodetect,
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GstElement * kid);
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G_DEFINE_TYPE (GstAutoAudioSink, gst_auto_audio_sink, GST_TYPE_AUTO_DETECT);
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static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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static void
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gst_auto_audio_sink_class_init (GstAutoAudioSinkClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
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GstAutoDetectClass *aklass = GST_AUTO_DETECT_CLASS (klass);
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gobject_class->set_property = gst_auto_audio_sink_set_property;
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gobject_class->get_property = gst_auto_audio_sink_get_property;
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aklass->configure = gst_auto_audio_sink_configure;
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g_object_class_install_property (gobject_class, PROP_TS_OFFSET,
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g_param_spec_int64 ("ts-offset", "TS Offset",
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"Timestamp offset in nanoseconds", G_MININT64, G_MAXINT64,
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DEFAULT_TS_OFFSET, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gst_element_class_add_pad_template (eklass,
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gst_static_pad_template_get (&sink_template));
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gst_element_class_set_static_metadata (eklass, "Auto audio sink",
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"Sink/Audio",
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"Wrapper audio sink for automatically detected audio sink",
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"Jan Schmidt <thaytan@noraisin.net>");
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}
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static void
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gst_auto_audio_sink_init (GstAutoAudioSink * sink)
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{
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GstAutoDetect *autodetect = GST_AUTO_DETECT (sink);
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autodetect->media_klass = "Audio";
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autodetect->flag = GST_ELEMENT_FLAG_SINK;
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sink->ts_offset = DEFAULT_TS_OFFSET;
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}
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static void
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gst_auto_audio_sink_configure (GstAutoDetect * autodetect, GstElement * kid)
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{
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GstAutoAudioSink *self = GST_AUTO_AUDIO_SINK (autodetect);
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g_object_set (G_OBJECT (kid), "ts-offset", self->ts_offset, NULL);
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}
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static void
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gst_auto_audio_sink_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstAutoAudioSink *sink = GST_AUTO_AUDIO_SINK (object);
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GstAutoDetect *autodetect = (GstAutoDetect *) sink;
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switch (prop_id) {
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case PROP_TS_OFFSET:
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sink->ts_offset = g_value_get_int64 (value);
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if (autodetect->kid)
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g_object_set_property (G_OBJECT (autodetect->kid), pspec->name, value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_auto_audio_sink_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstAutoAudioSink *sink = GST_AUTO_AUDIO_SINK (object);
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switch (prop_id) {
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case PROP_TS_OFFSET:
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g_value_set_int64 (value, sink->ts_offset);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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