2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2005 Wim Taymans <wim@fluendo.com>
5 * gstaudiosink.c: simple audio sink base class
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.
25 #include "gstaudiosink.h"
27 GST_DEBUG_CATEGORY_STATIC (gst_audio_sink_debug);
28 #define GST_CAT_DEFAULT gst_audio_sink_debug
30 #define GST_TYPE_AUDIORING_BUFFER \
31 (gst_audioringbuffer_get_type())
32 #define GST_AUDIORING_BUFFER(obj) \
33 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIORING_BUFFER,GstAudioRingBuffer))
34 #define GST_AUDIORING_BUFFER_CLASS(klass) \
35 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIORING_BUFFER,GstAudioRingBufferClass))
36 #define GST_AUDIORING_BUFFER_GET_CLASS(obj) \
37 (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_AUDIORING_BUFFER, GstAudioRingBufferClass))
38 #define GST_IS_AUDIORING_BUFFER(obj) \
39 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIORING_BUFFER))
40 #define GST_IS_AUDIORING_BUFFER_CLASS(obj)\
41 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIORING_BUFFER))
43 typedef struct _GstAudioRingBuffer GstAudioRingBuffer;
44 typedef struct _GstAudioRingBufferClass GstAudioRingBufferClass;
46 #define GST_AUDIORING_BUFFER_GET_COND(buf) (((GstAudioRingBuffer *)buf)->cond)
47 #define GST_AUDIORING_BUFFER_WAIT(buf) (g_cond_wait (GST_AUDIORING_BUFFER_GET_COND (buf), GST_OBJECT_GET_LOCK (buf)))
48 #define GST_AUDIORING_BUFFER_SIGNAL(buf) (g_cond_signal (GST_AUDIORING_BUFFER_GET_COND (buf)))
49 #define GST_AUDIORING_BUFFER_BROADCAST(buf)(g_cond_broadcast (GST_AUDIORING_BUFFER_GET_COND (buf)))
51 struct _GstAudioRingBuffer
61 struct _GstAudioRingBufferClass
63 GstRingBufferClass parent_class;
66 static void gst_audioringbuffer_class_init (GstAudioRingBufferClass * klass);
67 static void gst_audioringbuffer_init (GstAudioRingBuffer * ringbuffer,
68 GstAudioRingBufferClass * klass);
69 static void gst_audioringbuffer_dispose (GObject * object);
70 static void gst_audioringbuffer_finalize (GObject * object);
72 static GstRingBufferClass *ring_parent_class = NULL;
74 static gboolean gst_audioringbuffer_open_device (GstRingBuffer * buf);
75 static gboolean gst_audioringbuffer_close_device (GstRingBuffer * buf);
76 static gboolean gst_audioringbuffer_acquire (GstRingBuffer * buf,
77 GstRingBufferSpec * spec);
78 static gboolean gst_audioringbuffer_release (GstRingBuffer * buf);
79 static gboolean gst_audioringbuffer_start (GstRingBuffer * buf);
80 static gboolean gst_audioringbuffer_stop (GstRingBuffer * buf);
81 static guint gst_audioringbuffer_delay (GstRingBuffer * buf);
83 /* ringbuffer abstract base class */
85 gst_audioringbuffer_get_type (void)
87 static GType ringbuffer_type = 0;
89 if (!ringbuffer_type) {
90 static const GTypeInfo ringbuffer_info = {
91 sizeof (GstAudioRingBufferClass),
94 (GClassInitFunc) gst_audioringbuffer_class_init,
97 sizeof (GstAudioRingBuffer),
99 (GInstanceInitFunc) gst_audioringbuffer_init,
104 g_type_register_static (GST_TYPE_RING_BUFFER, "GstAudioSinkRingBuffer",
105 &ringbuffer_info, 0);
107 return ringbuffer_type;
111 gst_audioringbuffer_class_init (GstAudioRingBufferClass * klass)
113 GObjectClass *gobject_class;
114 GstObjectClass *gstobject_class;
115 GstRingBufferClass *gstringbuffer_class;
117 gobject_class = (GObjectClass *) klass;
118 gstobject_class = (GstObjectClass *) klass;
119 gstringbuffer_class = (GstRingBufferClass *) klass;
121 ring_parent_class = g_type_class_ref (GST_TYPE_RING_BUFFER);
123 gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_audioringbuffer_dispose);
124 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_audioringbuffer_finalize);
126 gstringbuffer_class->open_device =
127 GST_DEBUG_FUNCPTR (gst_audioringbuffer_open_device);
128 gstringbuffer_class->close_device =
129 GST_DEBUG_FUNCPTR (gst_audioringbuffer_close_device);
130 gstringbuffer_class->acquire =
131 GST_DEBUG_FUNCPTR (gst_audioringbuffer_acquire);
132 gstringbuffer_class->release =
133 GST_DEBUG_FUNCPTR (gst_audioringbuffer_release);
134 gstringbuffer_class->start = GST_DEBUG_FUNCPTR (gst_audioringbuffer_start);
135 gstringbuffer_class->pause = GST_DEBUG_FUNCPTR (gst_audioringbuffer_stop);
136 gstringbuffer_class->resume = GST_DEBUG_FUNCPTR (gst_audioringbuffer_start);
137 gstringbuffer_class->stop = GST_DEBUG_FUNCPTR (gst_audioringbuffer_stop);
139 gstringbuffer_class->delay = GST_DEBUG_FUNCPTR (gst_audioringbuffer_delay);
142 typedef guint (*WriteFunc) (GstAudioSink * sink, gpointer data, guint length);
144 /* this internal thread does nothing else but write samples to the audio device.
145 * It will write each segment in the ringbuffer and will update the play
147 * The start/stop methods control the thread.
150 audioringbuffer_thread_func (GstRingBuffer * buf)
153 GstAudioSinkClass *csink;
154 GstAudioRingBuffer *abuf = GST_AUDIORING_BUFFER (buf);
157 sink = GST_AUDIO_SINK (GST_OBJECT_PARENT (buf));
158 csink = GST_AUDIO_SINK_GET_CLASS (sink);
160 GST_DEBUG ("enter thread");
162 writefunc = csink->write;
163 if (writefunc == NULL)
171 if (gst_ring_buffer_prepare_read (buf, &readseg, &readptr, &len)) {
176 written = writefunc (sink, readptr + written, left);
177 GST_LOG ("transfered %d bytes of %d from segment %d", written, left,
179 if (written < 0 || written > left) {
180 GST_WARNING ("error writing data (reason: %s), skipping segment\n",
187 /* clear written samples */
188 gst_ring_buffer_clear (buf, readseg);
190 /* we wrote one segment */
191 gst_ring_buffer_advance (buf, 1);
193 GST_OBJECT_LOCK (abuf);
196 GST_DEBUG ("signal wait");
197 GST_AUDIORING_BUFFER_SIGNAL (buf);
198 GST_DEBUG ("wait for action");
199 GST_AUDIORING_BUFFER_WAIT (buf);
200 GST_DEBUG ("got signal");
203 GST_DEBUG ("continue running");
204 GST_OBJECT_UNLOCK (abuf);
207 GST_DEBUG ("exit thread");
214 GST_DEBUG ("no write function, exit thread");
219 GST_OBJECT_UNLOCK (abuf);
220 GST_DEBUG ("stop running, exit thread");
226 gst_audioringbuffer_init (GstAudioRingBuffer * ringbuffer,
227 GstAudioRingBufferClass * g_class)
229 ringbuffer->running = FALSE;
230 ringbuffer->queuedseg = 0;
232 ringbuffer->cond = g_cond_new ();
236 gst_audioringbuffer_dispose (GObject * object)
238 G_OBJECT_CLASS (ring_parent_class)->dispose (object);
242 gst_audioringbuffer_finalize (GObject * object)
244 G_OBJECT_CLASS (ring_parent_class)->finalize (object);
248 gst_audioringbuffer_open_device (GstRingBuffer * buf)
251 GstAudioSinkClass *csink;
252 gboolean result = TRUE;
254 sink = GST_AUDIO_SINK (GST_OBJECT_PARENT (buf));
255 csink = GST_AUDIO_SINK_GET_CLASS (sink);
258 result = csink->open (sink);
267 GST_DEBUG ("could not open device");
273 gst_audioringbuffer_close_device (GstRingBuffer * buf)
276 GstAudioSinkClass *csink;
277 gboolean result = TRUE;
279 sink = GST_AUDIO_SINK (GST_OBJECT_PARENT (buf));
280 csink = GST_AUDIO_SINK_GET_CLASS (sink);
283 result = csink->close (sink);
286 goto could_not_close;
292 GST_DEBUG ("could not close device");
298 gst_audioringbuffer_acquire (GstRingBuffer * buf, GstRingBufferSpec * spec)
301 GstAudioSinkClass *csink;
302 GstAudioRingBuffer *abuf;
303 gboolean result = FALSE;
305 sink = GST_AUDIO_SINK (GST_OBJECT_PARENT (buf));
306 csink = GST_AUDIO_SINK_GET_CLASS (sink);
309 result = csink->prepare (sink, spec);
312 goto could_not_prepare;
314 /* allocate one more segment as we need some headroom */
317 buf->data = gst_buffer_new_and_alloc (spec->segtotal * spec->segsize);
318 memset (GST_BUFFER_DATA (buf->data), 0, GST_BUFFER_SIZE (buf->data));
320 abuf = GST_AUDIORING_BUFFER (buf);
321 abuf->running = TRUE;
324 g_thread_create ((GThreadFunc) audioringbuffer_thread_func, buf, TRUE,
326 GST_AUDIORING_BUFFER_WAIT (buf);
332 GST_DEBUG ("could not prepare device");
337 /* function is called with LOCK */
339 gst_audioringbuffer_release (GstRingBuffer * buf)
342 GstAudioSinkClass *csink;
343 GstAudioRingBuffer *abuf;
344 gboolean result = FALSE;
346 sink = GST_AUDIO_SINK (GST_OBJECT_PARENT (buf));
347 csink = GST_AUDIO_SINK_GET_CLASS (sink);
348 abuf = GST_AUDIORING_BUFFER (buf);
350 abuf->running = FALSE;
351 GST_AUDIORING_BUFFER_SIGNAL (buf);
352 GST_OBJECT_UNLOCK (buf);
354 /* join the thread */
355 g_thread_join (sink->thread);
357 GST_OBJECT_LOCK (buf);
359 /* free the buffer */
360 gst_buffer_unref (buf->data);
363 if (csink->unprepare)
364 result = csink->unprepare (sink);
367 goto could_not_unprepare;
373 GST_DEBUG ("could not unprepare device");
379 gst_audioringbuffer_start (GstRingBuffer * buf)
383 sink = GST_AUDIO_SINK (GST_OBJECT_PARENT (buf));
385 GST_DEBUG ("start, sending signal");
386 GST_AUDIORING_BUFFER_SIGNAL (buf);
392 gst_audioringbuffer_stop (GstRingBuffer * buf)
395 GstAudioSinkClass *csink;
396 GstAudioRingBuffer *abuf;
398 sink = GST_AUDIO_SINK (GST_OBJECT_PARENT (buf));
399 csink = GST_AUDIO_SINK_GET_CLASS (sink);
400 abuf = GST_AUDIORING_BUFFER (buf);
402 /* unblock any pending writes to the audio device */
404 GST_DEBUG ("reset...");
406 GST_DEBUG ("reset done");
410 GST_DEBUG ("stop, waiting...");
411 GST_AUDIORING_BUFFER_WAIT (buf);
412 GST_DEBUG ("stopped");
419 gst_audioringbuffer_delay (GstRingBuffer * buf)
422 GstAudioSinkClass *csink;
425 sink = GST_AUDIO_SINK (GST_OBJECT_PARENT (buf));
426 csink = GST_AUDIO_SINK_GET_CLASS (sink);
429 res = csink->delay (sink);
434 /* AudioSink signals and args */
446 #define _do_init(bla) \
447 GST_DEBUG_CATEGORY_INIT (gst_audio_sink_debug, "audiosink", 0, "audiosink element");
449 GST_BOILERPLATE_FULL (GstAudioSink, gst_audio_sink, GstBaseAudioSink,
450 GST_TYPE_BASE_AUDIO_SINK, _do_init);
452 static GstRingBuffer *gst_audio_sink_create_ringbuffer (GstBaseAudioSink *
456 gst_audio_sink_base_init (gpointer g_class)
461 gst_audio_sink_class_init (GstAudioSinkClass * klass)
463 GObjectClass *gobject_class;
464 GstElementClass *gstelement_class;
465 GstBaseSinkClass *gstbasesink_class;
466 GstBaseAudioSinkClass *gstbaseaudiosink_class;
468 gobject_class = (GObjectClass *) klass;
469 gstelement_class = (GstElementClass *) klass;
470 gstbasesink_class = (GstBaseSinkClass *) klass;
471 gstbaseaudiosink_class = (GstBaseAudioSinkClass *) klass;
473 gstbaseaudiosink_class->create_ringbuffer =
474 GST_DEBUG_FUNCPTR (gst_audio_sink_create_ringbuffer);
478 gst_audio_sink_init (GstAudioSink * audiosink, GstAudioSinkClass * g_class)
482 static GstRingBuffer *
483 gst_audio_sink_create_ringbuffer (GstBaseAudioSink * sink)
485 GstRingBuffer *buffer;
487 GST_DEBUG ("creating ringbuffer");
488 buffer = g_object_new (GST_TYPE_AUDIORING_BUFFER, NULL);
489 GST_DEBUG ("created ringbuffer @%p", buffer);