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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wim.taymans@chello.be>
*
* gstosxaudiosink.c:
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <CoreAudio/CoreAudio.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include "gstosxaudiosink.h"
/* elementfactory information */
static GstElementDetails gst_osxaudiosink_details =
GST_ELEMENT_DETAILS ("Audio Sink (Mac OS X)",
"Sink/Audio",
"Output to a Mac OS X CoreAudio Sound Device",
"Zaheer Abbas Merali <zaheerabbas at merali dot org>");
static void gst_osxaudiosink_base_init (gpointer g_class);
static void gst_osxaudiosink_class_init (GstOsxAudioSinkClass * klass);
static void gst_osxaudiosink_init (GstOsxAudioSink * osxaudiosink);
static void gst_osxaudiosink_dispose (GObject * object);
static GstElementStateReturn gst_osxaudiosink_change_state (GstElement *
element);
static void gst_osxaudiosink_chain (GstPad * pad, GstData * _data);
/* OssSink signals and args */
enum
{
SIGNAL_HANDOFF,
LAST_SIGNAL
};
static GstStaticPadTemplate osxaudiosink_sink_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-float, "
"endianness = (int) BYTE_ORDER, "
"signed = (boolean) TRUE, "
"width = (int) 32, " "rate = (int) 44100, " "channels = (int) 2")
);
static GstElementClass *parent_class = NULL;
static guint gst_osssink_signals[LAST_SIGNAL] = { 0 };
GType
gst_osxaudiosink_get_type (void)
{
static GType osxaudiosink_type = 0;
if (!osxaudiosink_type) {
static const GTypeInfo osxaudiosink_info = {
sizeof (GstOsxAudioSinkClass),
gst_osxaudiosink_base_init,
NULL,
(GClassInitFunc) gst_osxaudiosink_class_init,
NULL,
NULL,
sizeof (GstOsxAudioSink),
0,
(GInstanceInitFunc) gst_osxaudiosink_init,
};
osxaudiosink_type =
g_type_register_static (GST_TYPE_OSXAUDIOELEMENT, "GstOsxAudioSink",
&osxaudiosink_info, 0);
}
return osxaudiosink_type;
}
static void
gst_osxaudiosink_dispose (GObject * object)
{
/* GstOsxAudioSink *osxaudiosink = (GstOsxAudioSink *) object; */
/*gst_object_unparent (GST_OBJECT (osxaudiosink->provided_clock)); */
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_osxaudiosink_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_osxaudiosink_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&osxaudiosink_sink_factory));
}
static void
gst_osxaudiosink_class_init (GstOsxAudioSinkClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_OSXAUDIOELEMENT);
gst_osssink_signals[SIGNAL_HANDOFF] =
g_signal_new ("handoff", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstOsxAudioSinkClass, handoff), NULL, NULL,
g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
gobject_class->dispose = gst_osxaudiosink_dispose;
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_osxaudiosink_change_state);
}
static void
gst_osxaudiosink_init (GstOsxAudioSink * osxaudiosink)
{
osxaudiosink->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&osxaudiosink_sink_factory), "sink");
gst_element_add_pad (GST_ELEMENT (osxaudiosink), osxaudiosink->sinkpad);
gst_pad_set_chain_function (osxaudiosink->sinkpad, gst_osxaudiosink_chain);
GST_DEBUG ("initializing osxaudiosink");
GST_FLAG_SET (osxaudiosink, GST_ELEMENT_THREAD_SUGGESTED);
GST_FLAG_SET (osxaudiosink, GST_ELEMENT_EVENT_AWARE);
}
static void
gst_osxaudiosink_chain (GstPad * pad, GstData * _data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstOsxAudioSink *osxaudiosink;
guchar *data;
guint to_write;
gint amount_written;
/* this has to be an audio buffer */
osxaudiosink = GST_OSXAUDIOSINK (gst_pad_get_parent (pad));
if (GST_IS_EVENT (buf)) {
GstEvent *event = GST_EVENT (buf);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
gst_pad_event_default (pad, event);
return;
case GST_EVENT_DISCONTINUOUS:
/* pass-through */
default:
gst_pad_event_default (pad, event);
return;
}
g_assert_not_reached ();
}
data = GST_BUFFER_DATA (buf);
to_write = GST_BUFFER_SIZE (buf);
amount_written = 0;
while (amount_written < to_write) {
data += amount_written;
to_write -= amount_written;
amount_written =
write_buffer (GST_OSXAUDIOELEMENT (osxaudiosink), data, to_write);
}
gst_buffer_unref (buf);
}
static GstElementStateReturn
gst_osxaudiosink_change_state (GstElement * element)
{
GstOsxAudioSink *osxaudiosink;
OSErr status;
osxaudiosink = GST_OSXAUDIOSINK (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_READY_TO_PAUSED:
break;
case GST_STATE_PAUSED_TO_PLAYING:
status =
AudioDeviceStart (GST_OSXAUDIOELEMENT (osxaudiosink)->device_id,
outputAudioDeviceIOProc);
if (status)
GST_DEBUG ("AudioDeviceStart returned %d\n", (int) status);
break;
case GST_STATE_PLAYING_TO_PAUSED:
status =
AudioDeviceStop (GST_OSXAUDIOELEMENT (osxaudiosink)->device_id,
outputAudioDeviceIOProc);
if (status)
GST_DEBUG ("AudioDeviceStop returned %d\n", (int) status);
break;
case GST_STATE_PAUSED_TO_READY:
break;
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
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