2 * (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
3 * (c) 2006 Jürg Billeter <j@bitron.ch>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
22 * SECTION:element-halaudiosink
24 * HalAudioSink allows access to output of sound devices by specifying the
25 * corresponding persistent Unique Device Id (UDI) from the Hardware Abstraction
26 * Layer (HAL) in the #GstHalAudioSink:udi property.
27 * It currently always embeds alsasink or osssink as HAL doesn't support other
28 * sound systems yet. You can also specify the UDI of a device that has ALSA or
29 * OSS subdevices. If both are present ALSA is preferred.
32 * <title>Examples</title>
34 * hal-find-by-property --key alsa.type --string playback
35 * ]| list the UDIs of all your ALSA output devices
37 * gst-launch -v audiotestsrc ! halaudiosink udi=/org/freedesktop/Hal/devices/pci_8086_27d8_alsa_playback_0
38 * ]| test your soundcard by playing a test signal on the specified sound device.
46 #include "gsthalelements.h"
47 #include "gsthalaudiosink.h"
49 static void gst_hal_audio_sink_dispose (GObject * object);
50 static GstStateChangeReturn
51 gst_hal_audio_sink_change_state (GstElement * element,
52 GstStateChange transition);
60 GST_BOILERPLATE (GstHalAudioSink, gst_hal_audio_sink, GstBin, GST_TYPE_BIN);
62 static void gst_hal_audio_sink_set_property (GObject * object, guint prop_id,
63 const GValue * value, GParamSpec * pspec);
64 static void gst_hal_audio_sink_get_property (GObject * object, guint prop_id,
65 GValue * value, GParamSpec * pspec);
68 gst_hal_audio_sink_base_init (gpointer klass)
70 GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
72 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
77 gst_element_class_add_pad_template (eklass,
78 gst_static_pad_template_get (&sink_template));
79 gst_element_class_set_details_simple (eklass, "HAL audio sink",
81 "Audio sink for sound device access via HAL",
82 "Jürg Billeter <j@bitron.ch>");
86 gst_hal_audio_sink_class_init (GstHalAudioSinkClass * klass)
88 GObjectClass *oklass = G_OBJECT_CLASS (klass);
89 GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
91 oklass->set_property = gst_hal_audio_sink_set_property;
92 oklass->get_property = gst_hal_audio_sink_get_property;
93 oklass->dispose = gst_hal_audio_sink_dispose;
94 eklass->change_state = gst_hal_audio_sink_change_state;
96 g_object_class_install_property (oklass, PROP_UDI,
97 g_param_spec_string ("udi",
98 "UDI", "Unique Device Id", NULL,
99 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
103 * Hack to make negotiation work.
107 gst_hal_audio_sink_reset (GstHalAudioSink * sink)
113 gst_element_set_state (sink->kid, GST_STATE_NULL);
114 gst_bin_remove (GST_BIN (sink), sink->kid);
116 sink->kid = gst_element_factory_make ("fakesink", "testsink");
117 gst_bin_add (GST_BIN (sink), sink->kid);
119 targetpad = gst_element_get_static_pad (sink->kid, "sink");
120 gst_ghost_pad_set_target (GST_GHOST_PAD (sink->pad), targetpad);
121 gst_object_unref (targetpad);
125 gst_hal_audio_sink_init (GstHalAudioSink * sink, GstHalAudioSinkClass * g_class)
127 sink->pad = gst_ghost_pad_new_no_target ("sink", GST_PAD_SINK);
128 gst_element_add_pad (GST_ELEMENT (sink), sink->pad);
130 gst_hal_audio_sink_reset (sink);
134 gst_hal_audio_sink_dispose (GObject * object)
136 GstHalAudioSink *sink = GST_HAL_AUDIO_SINK (object);
143 GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
147 do_toggle_element (GstHalAudioSink * sink)
151 /* kill old element */
153 GST_DEBUG_OBJECT (sink, "Removing old kid");
154 gst_element_set_state (sink->kid, GST_STATE_NULL);
155 gst_bin_remove (GST_BIN (sink), sink->kid);
159 GST_DEBUG_OBJECT (sink, "Creating new kid");
161 GST_INFO_OBJECT (sink, "No UDI set for device, using default one");
163 if (!(sink->kid = gst_hal_get_audio_sink (sink->udi))) {
164 GST_ELEMENT_ERROR (sink, LIBRARY, SETTINGS, (NULL),
165 ("Failed to render audio sink from Hal"));
168 gst_element_set_state (sink->kid, GST_STATE (sink));
169 gst_bin_add (GST_BIN (sink), sink->kid);
171 /* re-attach ghostpad */
172 GST_DEBUG_OBJECT (sink, "Creating new ghostpad");
173 targetpad = gst_element_get_static_pad (sink->kid, "sink");
174 gst_ghost_pad_set_target (GST_GHOST_PAD (sink->pad), targetpad);
175 gst_object_unref (targetpad);
176 GST_DEBUG_OBJECT (sink, "done changing hal audio sink");
182 gst_hal_audio_sink_set_property (GObject * object, guint prop_id,
183 const GValue * value, GParamSpec * pspec)
185 GstHalAudioSink *this = GST_HAL_AUDIO_SINK (object);
187 GST_OBJECT_LOCK (this);
193 this->udi = g_value_dup_string (value);
196 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
200 GST_OBJECT_UNLOCK (this);
204 gst_hal_audio_sink_get_property (GObject * object, guint prop_id,
205 GValue * value, GParamSpec * pspec)
207 GstHalAudioSink *this = GST_HAL_AUDIO_SINK (object);
209 GST_OBJECT_LOCK (this);
213 g_value_set_string (value, this->udi);
216 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
220 GST_OBJECT_UNLOCK (this);
223 static GstStateChangeReturn
224 gst_hal_audio_sink_change_state (GstElement * element,
225 GstStateChange transition)
227 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
228 GstHalAudioSink *sink = GST_HAL_AUDIO_SINK (element);
230 switch (transition) {
231 case GST_STATE_CHANGE_NULL_TO_READY:
232 if (!do_toggle_element (sink))
233 return GST_STATE_CHANGE_FAILURE;
239 ret = GST_CALL_PARENT_WITH_DEFAULT (GST_ELEMENT_CLASS, change_state,
240 (element, transition), GST_STATE_CHANGE_SUCCESS);
242 switch (transition) {
243 case GST_STATE_CHANGE_READY_TO_NULL:
244 gst_hal_audio_sink_reset (sink);