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_static_pad_template (eklass, &sink_template);
78 gst_element_class_set_details_simple (eklass, "HAL audio sink",
80 "Audio sink for sound device access via HAL",
81 "Jürg Billeter <j@bitron.ch>");
85 gst_hal_audio_sink_class_init (GstHalAudioSinkClass * klass)
87 GObjectClass *oklass = G_OBJECT_CLASS (klass);
88 GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
90 oklass->set_property = gst_hal_audio_sink_set_property;
91 oklass->get_property = gst_hal_audio_sink_get_property;
92 oklass->dispose = gst_hal_audio_sink_dispose;
93 eklass->change_state = gst_hal_audio_sink_change_state;
95 g_object_class_install_property (oklass, PROP_UDI,
96 g_param_spec_string ("udi",
97 "UDI", "Unique Device Id", NULL,
98 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
102 * Hack to make negotiation work.
106 gst_hal_audio_sink_reset (GstHalAudioSink * sink)
112 gst_element_set_state (sink->kid, GST_STATE_NULL);
113 gst_bin_remove (GST_BIN (sink), sink->kid);
115 sink->kid = gst_element_factory_make ("fakesink", "testsink");
116 gst_bin_add (GST_BIN (sink), sink->kid);
118 targetpad = gst_element_get_static_pad (sink->kid, "sink");
119 gst_ghost_pad_set_target (GST_GHOST_PAD (sink->pad), targetpad);
120 gst_object_unref (targetpad);
124 gst_hal_audio_sink_init (GstHalAudioSink * sink, GstHalAudioSinkClass * g_class)
126 sink->pad = gst_ghost_pad_new_no_target ("sink", GST_PAD_SINK);
127 gst_element_add_pad (GST_ELEMENT (sink), sink->pad);
129 gst_hal_audio_sink_reset (sink);
133 gst_hal_audio_sink_dispose (GObject * object)
135 GstHalAudioSink *sink = GST_HAL_AUDIO_SINK (object);
142 GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
146 do_toggle_element (GstHalAudioSink * sink)
150 /* kill old element */
152 GST_DEBUG_OBJECT (sink, "Removing old kid");
153 gst_element_set_state (sink->kid, GST_STATE_NULL);
154 gst_bin_remove (GST_BIN (sink), sink->kid);
158 GST_DEBUG_OBJECT (sink, "Creating new kid");
160 GST_INFO_OBJECT (sink, "No UDI set for device, using default one");
162 if (!(sink->kid = gst_hal_get_audio_sink (sink->udi))) {
163 GST_ELEMENT_ERROR (sink, LIBRARY, SETTINGS, (NULL),
164 ("Failed to render audio sink from Hal"));
167 gst_element_set_state (sink->kid, GST_STATE (sink));
168 gst_bin_add (GST_BIN (sink), sink->kid);
170 /* re-attach ghostpad */
171 GST_DEBUG_OBJECT (sink, "Creating new ghostpad");
172 targetpad = gst_element_get_static_pad (sink->kid, "sink");
173 gst_ghost_pad_set_target (GST_GHOST_PAD (sink->pad), targetpad);
174 gst_object_unref (targetpad);
175 GST_DEBUG_OBJECT (sink, "done changing hal audio sink");
181 gst_hal_audio_sink_set_property (GObject * object, guint prop_id,
182 const GValue * value, GParamSpec * pspec)
184 GstHalAudioSink *this = GST_HAL_AUDIO_SINK (object);
186 GST_OBJECT_LOCK (this);
192 this->udi = g_value_dup_string (value);
195 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
199 GST_OBJECT_UNLOCK (this);
203 gst_hal_audio_sink_get_property (GObject * object, guint prop_id,
204 GValue * value, GParamSpec * pspec)
206 GstHalAudioSink *this = GST_HAL_AUDIO_SINK (object);
208 GST_OBJECT_LOCK (this);
212 g_value_set_string (value, this->udi);
215 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
219 GST_OBJECT_UNLOCK (this);
222 static GstStateChangeReturn
223 gst_hal_audio_sink_change_state (GstElement * element,
224 GstStateChange transition)
226 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
227 GstHalAudioSink *sink = GST_HAL_AUDIO_SINK (element);
229 switch (transition) {
230 case GST_STATE_CHANGE_NULL_TO_READY:
231 if (!do_toggle_element (sink))
232 return GST_STATE_CHANGE_FAILURE;
238 ret = GST_CALL_PARENT_WITH_DEFAULT (GST_ELEMENT_CLASS, change_state,
239 (element, transition), GST_STATE_CHANGE_SUCCESS);
241 switch (transition) {
242 case GST_STATE_CHANGE_READY_TO_NULL:
243 gst_hal_audio_sink_reset (sink);