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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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108 lines
3.2 KiB
C
108 lines
3.2 KiB
C
/*
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* GStreamer - SunAudio mixer
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* Copyright (C) 2005,2006 Sun Microsystems, Inc.,
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* Brian Cameron <brian.cameron@sun.com>
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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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/**
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* SECTION:element-sunaudiomixer
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*
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* sunaudiomixer is an mixer that controls the sound input and output
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* levels with the Sun Audio interface available in Solaris.
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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 "gstsunaudiomixer.h"
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static const GstElementDetails gst_sunaudiomixer_details =
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GST_ELEMENT_DETAILS ("Sun Audio Mixer",
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"Generic/Audio",
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"Control sound input and output levels with Sun Audio",
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"Brian Cameron <brian.cameron@sun.com>");
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GST_BOILERPLATE_WITH_INTERFACE (GstSunAudioMixer, gst_sunaudiomixer,
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GstElement, GST_TYPE_ELEMENT, GstMixer, GST_TYPE_MIXER, gst_sunaudiomixer);
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GST_IMPLEMENT_SUNAUDIO_MIXER_CTRL_METHODS (GstSunAudioMixer, gst_sunaudiomixer);
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static GstStateChangeReturn gst_sunaudiomixer_change_state (GstElement *
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element, GstStateChange transition);
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static void
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gst_sunaudiomixer_base_init (gpointer klass)
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{
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gst_element_class_set_details (GST_ELEMENT_CLASS (klass),
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&gst_sunaudiomixer_details);
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}
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static void
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gst_sunaudiomixer_class_init (GstSunAudioMixerClass * klass)
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{
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GstElementClass *element_class;
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element_class = (GstElementClass *) klass;
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element_class->change_state = gst_sunaudiomixer_change_state;
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}
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static void
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gst_sunaudiomixer_init (GstSunAudioMixer * this,
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GstSunAudioMixerClass * g_class)
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{
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this->mixer = NULL;
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}
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static GstStateChangeReturn
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gst_sunaudiomixer_change_state (GstElement * element, GstStateChange transition)
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{
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GstSunAudioMixer *this = GST_SUNAUDIO_MIXER (element);
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switch (transition) {
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case GST_STATE_CHANGE_NULL_TO_READY:
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if (!this->mixer) {
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const char *audiodev;
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audiodev = g_getenv ("AUDIODEV");
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if (audiodev == NULL) {
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this->mixer = gst_sunaudiomixer_ctrl_new ("/dev/audioctl");
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} else {
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gchar *device = g_strdup_printf ("%sctl", audiodev);
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this->mixer = gst_sunaudiomixer_ctrl_new (device);
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g_free (device);
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}
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}
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break;
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case GST_STATE_CHANGE_READY_TO_NULL:
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if (this->mixer) {
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gst_sunaudiomixer_ctrl_free (this->mixer);
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this->mixer = NULL;
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}
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break;
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default:
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break;
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}
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if (GST_ELEMENT_CLASS (parent_class)->change_state)
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return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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return GST_STATE_CHANGE_SUCCESS;
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}
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