2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wim.taymans@chello.be>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
26 #include <CoreAudio/CoreAudio.h>
31 #include "gstosxaudiosink.h"
33 /* elementfactory information */
34 static GstElementDetails gst_osxaudiosink_details =
35 GST_ELEMENT_DETAILS ("Audio Sink (Mac OS X)",
37 "Output to a Mac OS X CoreAudio Sound Device",
38 "Zaheer Abbas Merali <zaheerabbas at merali dot org>");
40 static void gst_osxaudiosink_base_init (gpointer g_class);
41 static void gst_osxaudiosink_class_init (GstOsxAudioSinkClass * klass);
42 static void gst_osxaudiosink_init (GstOsxAudioSink * osxaudiosink);
43 static void gst_osxaudiosink_dispose (GObject * object);
45 static GstStateChangeReturn gst_osxaudiosink_change_state (GstElement *
48 static void gst_osxaudiosink_chain (GstPad * pad, GstData * _data);
50 /* OssSink signals and args */
57 static GstStaticPadTemplate osxaudiosink_sink_factory =
58 GST_STATIC_PAD_TEMPLATE ("sink",
61 GST_STATIC_CAPS ("audio/x-raw-float, "
62 "endianness = (int) BYTE_ORDER, "
63 "signed = (boolean) TRUE, "
64 "width = (int) 32, " "rate = (int) 44100, " "channels = (int) 2")
67 static GstElementClass *parent_class = NULL;
68 static guint gst_osssink_signals[LAST_SIGNAL] = { 0 };
71 gst_osxaudiosink_get_type (void)
73 static GType osxaudiosink_type = 0;
75 if (!osxaudiosink_type) {
76 static const GTypeInfo osxaudiosink_info = {
77 sizeof (GstOsxAudioSinkClass),
78 gst_osxaudiosink_base_init,
80 (GClassInitFunc) gst_osxaudiosink_class_init,
83 sizeof (GstOsxAudioSink),
85 (GInstanceInitFunc) gst_osxaudiosink_init,
89 g_type_register_static (GST_TYPE_OSXAUDIOELEMENT, "GstOsxAudioSink",
90 &osxaudiosink_info, 0);
93 return osxaudiosink_type;
97 gst_osxaudiosink_dispose (GObject * object)
99 /* GstOsxAudioSink *osxaudiosink = (GstOsxAudioSink *) object; */
101 /*gst_object_unparent (GST_OBJECT (osxaudiosink->provided_clock)); */
103 G_OBJECT_CLASS (parent_class)->dispose (object);
107 gst_osxaudiosink_base_init (gpointer g_class)
109 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
111 gst_element_class_set_details (element_class, &gst_osxaudiosink_details);
112 gst_element_class_add_pad_template (element_class,
113 gst_static_pad_template_get (&osxaudiosink_sink_factory));
116 gst_osxaudiosink_class_init (GstOsxAudioSinkClass * klass)
118 GObjectClass *gobject_class;
119 GstElementClass *gstelement_class;
121 gobject_class = (GObjectClass *) klass;
122 gstelement_class = (GstElementClass *) klass;
124 parent_class = g_type_class_ref (GST_TYPE_OSXAUDIOELEMENT);
126 gst_osssink_signals[SIGNAL_HANDOFF] =
127 g_signal_new ("handoff", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
128 G_STRUCT_OFFSET (GstOsxAudioSinkClass, handoff), NULL, NULL,
129 g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
131 gobject_class->dispose = gst_osxaudiosink_dispose;
133 gstelement_class->change_state =
134 GST_DEBUG_FUNCPTR (gst_osxaudiosink_change_state);
138 gst_osxaudiosink_init (GstOsxAudioSink * osxaudiosink)
140 osxaudiosink->sinkpad =
141 gst_pad_new_from_template (gst_static_pad_template_get
142 (&osxaudiosink_sink_factory), "sink");
143 gst_element_add_pad (GST_ELEMENT (osxaudiosink), osxaudiosink->sinkpad);
145 gst_pad_set_chain_function (osxaudiosink->sinkpad, gst_osxaudiosink_chain);
147 GST_DEBUG ("initializing osxaudiosink");
149 GST_OBJECT_FLAG_SET (osxaudiosink, GST_ELEMENT_THREAD_SUGGESTED);
150 GST_OBJECT_FLAG_SET (osxaudiosink, GST_ELEMENT_EVENT_AWARE);
154 gst_osxaudiosink_chain (GstPad * pad, GstData * _data)
156 GstBuffer *buf = GST_BUFFER (_data);
157 GstOsxAudioSink *osxaudiosink;
162 /* this has to be an audio buffer */
163 osxaudiosink = GST_OSXAUDIOSINK (gst_pad_get_parent (pad));
165 if (GST_IS_EVENT (buf)) {
166 GstEvent *event = GST_EVENT (buf);
168 switch (GST_EVENT_TYPE (event)) {
170 gst_pad_event_default (pad, event);
171 gst_object_unref (osxaudiosink);
173 case GST_EVENT_DISCONTINUOUS:
176 gst_object_unref (osxaudiosink);
177 gst_pad_event_default (pad, event);
180 g_assert_not_reached ();
183 data = GST_BUFFER_DATA (buf);
184 to_write = GST_BUFFER_SIZE (buf);
187 while (amount_written < to_write) {
188 data += amount_written;
189 to_write -= amount_written;
191 write_buffer (GST_OSXAUDIOELEMENT (osxaudiosink), data, to_write);
193 gst_buffer_unref (buf);
194 gst_object_unref (osxaudiosink);
197 static GstStateChangeReturn
198 gst_osxaudiosink_change_state (GstElement * element, GstStateChange transition)
200 GstOsxAudioSink *osxaudiosink;
203 osxaudiosink = GST_OSXAUDIOSINK (element);
205 switch (transition) {
206 case GST_STATE_CHANGE_READY_TO_PAUSED:
208 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
210 AudioDeviceStart (GST_OSXAUDIOELEMENT (osxaudiosink)->device_id,
211 outputAudioDeviceIOProc);
213 GST_DEBUG ("AudioDeviceStart returned %d\n", (int) status);
215 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
217 AudioDeviceStop (GST_OSXAUDIOELEMENT (osxaudiosink)->device_id,
218 outputAudioDeviceIOProc);
220 GST_DEBUG ("AudioDeviceStop returned %d\n", (int) status);
222 case GST_STATE_CHANGE_PAUSED_TO_READY:
228 if (GST_ELEMENT_CLASS (parent_class)->change_state)
229 return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
231 return GST_STATE_CHANGE_SUCCESS;