2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000,2005 Wim Taymans <wim@fluendo.com>
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.
24 * SECTION:element-osssink
25 * @short_description: output sound using OSS
29 * This element lets you output sound using the Open Sound System (OSS).
32 * Note that you should almost always use generic audio conversion elements
33 * like audioconvert and audioresample in front of an audiosink to make sure
34 * your pipeline works under all circumstances (those conversion elements will
35 * act in passthrough-mode if no conversion is necessary).
37 * <title>Example pipelines</title>
40 * gst-launch -v audiotestsrc ! audioconvert ! volume volume=0.1 ! osssink
42 * will output a sine wave (continuous beep sound) to your sound card (with
43 * a very low volume as precaution).
47 * gst-launch -v filesrc location=music.ogg ! decodebin ! audioconvert ! audioresample ! osssink
49 * will play an Ogg/Vorbis audio file and output it using the Open Sound System.
57 #include <sys/ioctl.h>
63 #ifdef HAVE_OSS_INCLUDE_IN_SYS
64 # include <sys/soundcard.h>
66 # ifdef HAVE_OSS_INCLUDE_IN_ROOT
67 # include <soundcard.h>
69 # ifdef HAVE_OSS_INCLUDE_IN_MACHINE
70 # include <machine/soundcard.h>
72 # error "What to include?"
73 # endif /* HAVE_OSS_INCLUDE_IN_MACHINE */
74 # endif /* HAVE_OSS_INCLUDE_IN_ROOT */
75 #endif /* HAVE_OSS_INCLUDE_IN_SYS */
78 #include "gstosssink.h"
80 GST_DEBUG_CATEGORY_EXTERN (oss_debug);
81 #define GST_CAT_DEFAULT oss_debug
83 /* elementfactory information */
84 static const GstElementDetails gst_oss_sink_details =
85 GST_ELEMENT_DETAILS ("Audio Sink (OSS)",
87 "Output to a sound card via OSS",
88 "Erik Walthinsen <omega@cse.ogi.edu>, "
89 "Wim Taymans <wim.taymans@chello.be>");
91 static void gst_oss_sink_base_init (gpointer g_class);
92 static void gst_oss_sink_class_init (GstOssSinkClass * klass);
93 static void gst_oss_sink_init (GstOssSink * osssink);
95 static void gst_oss_sink_dispose (GObject * object);
96 static void gst_oss_sink_finalise (GObject * object);
98 static void gst_oss_sink_get_property (GObject * object, guint prop_id,
99 GValue * value, GParamSpec * pspec);
100 static void gst_oss_sink_set_property (GObject * object, guint prop_id,
101 const GValue * value, GParamSpec * pspec);
103 static GstCaps *gst_oss_sink_getcaps (GstBaseSink * bsink);
105 static gboolean gst_oss_sink_open (GstAudioSink * asink);
106 static gboolean gst_oss_sink_close (GstAudioSink * asink);
107 static gboolean gst_oss_sink_prepare (GstAudioSink * asink,
108 GstRingBufferSpec * spec);
109 static gboolean gst_oss_sink_unprepare (GstAudioSink * asink);
110 static guint gst_oss_sink_write (GstAudioSink * asink, gpointer data,
112 static guint gst_oss_sink_delay (GstAudioSink * asink);
113 static void gst_oss_sink_reset (GstAudioSink * asink);
115 /* OssSink signals and args */
121 #define DEFAULT_DEVICE "/dev/dsp"
128 static GstStaticPadTemplate osssink_sink_factory =
129 GST_STATIC_PAD_TEMPLATE ("sink",
132 GST_STATIC_CAPS ("audio/x-raw-int, "
133 "endianness = (int) { " G_STRINGIFY (G_BYTE_ORDER) " }, "
134 "signed = (boolean) { TRUE, FALSE }, "
137 "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ]; "
139 "signed = (boolean) { TRUE, FALSE }, "
142 "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ]")
145 static GstElementClass *parent_class = NULL;
147 /* static guint gst_oss_sink_signals[LAST_SIGNAL] = { 0 }; */
150 gst_oss_sink_get_type (void)
152 static GType osssink_type = 0;
155 static const GTypeInfo osssink_info = {
156 sizeof (GstOssSinkClass),
157 gst_oss_sink_base_init,
159 (GClassInitFunc) gst_oss_sink_class_init,
164 (GInstanceInitFunc) gst_oss_sink_init,
168 g_type_register_static (GST_TYPE_AUDIO_SINK, "GstOssSink",
176 gst_oss_sink_dispose (GObject * object)
178 GstOssSink *osssink = GST_OSSSINK (object);
180 if (osssink->probed_caps) {
181 gst_caps_unref (osssink->probed_caps);
182 osssink->probed_caps = NULL;
185 G_OBJECT_CLASS (parent_class)->dispose (object);
189 gst_oss_sink_base_init (gpointer g_class)
191 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
193 gst_element_class_set_details (element_class, &gst_oss_sink_details);
195 gst_element_class_add_pad_template (element_class,
196 gst_static_pad_template_get (&osssink_sink_factory));
199 gst_oss_sink_class_init (GstOssSinkClass * klass)
201 GObjectClass *gobject_class;
202 GstElementClass *gstelement_class;
203 GstBaseSinkClass *gstbasesink_class;
204 GstBaseAudioSinkClass *gstbaseaudiosink_class;
205 GstAudioSinkClass *gstaudiosink_class;
207 gobject_class = (GObjectClass *) klass;
208 gstelement_class = (GstElementClass *) klass;
209 gstbasesink_class = (GstBaseSinkClass *) klass;
210 gstbaseaudiosink_class = (GstBaseAudioSinkClass *) klass;
211 gstaudiosink_class = (GstAudioSinkClass *) klass;
213 parent_class = g_type_class_peek_parent (klass);
215 gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_oss_sink_dispose);
216 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_oss_sink_finalise);
217 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_oss_sink_get_property);
218 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_oss_sink_set_property);
220 g_object_class_install_property (gobject_class, PROP_DEVICE,
221 g_param_spec_string ("device", "Device",
222 "OSS device (usually /dev/dspN)", DEFAULT_DEVICE, G_PARAM_READWRITE));
224 gstbasesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_oss_sink_getcaps);
226 gstaudiosink_class->open = GST_DEBUG_FUNCPTR (gst_oss_sink_open);
227 gstaudiosink_class->close = GST_DEBUG_FUNCPTR (gst_oss_sink_close);
228 gstaudiosink_class->prepare = GST_DEBUG_FUNCPTR (gst_oss_sink_prepare);
229 gstaudiosink_class->unprepare = GST_DEBUG_FUNCPTR (gst_oss_sink_unprepare);
230 gstaudiosink_class->write = GST_DEBUG_FUNCPTR (gst_oss_sink_write);
231 gstaudiosink_class->delay = GST_DEBUG_FUNCPTR (gst_oss_sink_delay);
232 gstaudiosink_class->reset = GST_DEBUG_FUNCPTR (gst_oss_sink_reset);
236 gst_oss_sink_init (GstOssSink * osssink)
238 GST_DEBUG_OBJECT (osssink, "initializing osssink");
240 osssink->device = g_strdup (DEFAULT_DEVICE);
245 gst_oss_sink_finalise (GObject * object)
247 GstOssSink *osssink = GST_OSSSINK (object);
249 g_free (osssink->device);
253 gst_oss_sink_set_property (GObject * object, guint prop_id,
254 const GValue * value, GParamSpec * pspec)
258 sink = GST_OSSSINK (object);
262 g_free (sink->device);
263 sink->device = g_value_dup_string (value);
264 if (sink->probed_caps) {
265 gst_caps_unref (sink->probed_caps);
266 sink->probed_caps = NULL;
270 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
276 gst_oss_sink_get_property (GObject * object, guint prop_id,
277 GValue * value, GParamSpec * pspec)
281 sink = GST_OSSSINK (object);
285 g_value_set_string (value, sink->device);
288 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
294 gst_oss_sink_getcaps (GstBaseSink * bsink)
299 osssink = GST_OSSSINK (bsink);
301 if (osssink->fd == -1) {
302 caps = gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_SINK_PAD
304 } else if (osssink->probed_caps) {
305 caps = gst_caps_copy (osssink->probed_caps);
307 caps = gst_oss_helper_probe_caps (osssink->fd);
308 if (caps && !gst_caps_is_empty (caps)) {
309 osssink->probed_caps = gst_caps_copy (caps);
319 /* well... hacker's delight explains... */
325 x = x - ((x >> 1) & 0x55555555);
326 x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
327 x = (x + (x >> 4)) & 0x0f0f0f0f;
330 return (x & 0x0000003f) - 1;
334 gst_oss_sink_get_format (GstBufferFormat fmt)
340 result = AFMT_MU_LAW;
346 result = AFMT_IMA_ADPCM;
352 result = AFMT_S16_LE;
355 result = AFMT_S16_BE;
361 result = AFMT_U16_LE;
364 result = AFMT_U16_BE;
377 gst_oss_sink_open (GstAudioSink * asink)
382 oss = GST_OSSSINK (asink);
387 oss->fd = open (oss->device, mode, 0);
401 GST_ELEMENT_ERROR (oss, RESOURCE, BUSY, (NULL), (NULL));
407 GST_ELEMENT_ERROR (oss, RESOURCE, OPEN_WRITE, (NULL), GST_ERROR_SYSTEM);
413 gst_oss_sink_close (GstAudioSink * asink)
415 close (GST_OSSSINK (asink)->fd);
416 GST_OSSSINK (asink)->fd = -1;
421 gst_oss_sink_prepare (GstAudioSink * asink, GstRingBufferSpec * spec)
424 struct audio_buf_info info;
428 oss = GST_OSSSINK (asink);
430 mode = fcntl (oss->fd, F_GETFL);
432 if (fcntl (oss->fd, F_SETFL, mode) == -1)
435 tmp = gst_oss_sink_get_format (spec->format);
439 if (spec->width != 16 && spec->width != 8)
442 SET_PARAM (oss, SNDCTL_DSP_SETFMT, tmp, "SETFMT");
443 if (spec->channels == 2)
444 SET_PARAM (oss, SNDCTL_DSP_STEREO, 1, "STEREO");
445 SET_PARAM (oss, SNDCTL_DSP_CHANNELS, spec->channels, "CHANNELS");
446 SET_PARAM (oss, SNDCTL_DSP_SPEED, spec->rate, "SPEED");
448 tmp = ilog2 (spec->segsize);
449 tmp = ((spec->segtotal & 0x7fff) << 16) | tmp;
450 GST_DEBUG_OBJECT (oss, "set segsize: %d, segtotal: %d, value: %08x",
451 spec->segsize, spec->segtotal, tmp);
453 SET_PARAM (oss, SNDCTL_DSP_SETFRAGMENT, tmp, "SETFRAGMENT");
454 GET_PARAM (oss, SNDCTL_DSP_GETOSPACE, &info, "GETOSPACE");
456 spec->segsize = info.fragsize;
457 spec->segtotal = info.fragstotal;
459 spec->bytes_per_sample = (spec->width / 8) * spec->channels;
460 oss->bytes_per_sample = (spec->width / 8) * spec->channels;
461 memset (spec->silence_sample, 0, spec->bytes_per_sample);
463 GST_DEBUG_OBJECT (oss, "got segsize: %d, segtotal: %d, value: %08x",
464 spec->segsize, spec->segtotal, tmp);
470 GST_ELEMENT_ERROR (oss, RESOURCE, SETTINGS, (NULL),
471 ("Unable to set device %s in non blocking mode: %s",
472 oss->device, g_strerror (errno)));
477 GST_ELEMENT_ERROR (oss, RESOURCE, SETTINGS, (NULL),
478 ("Unable to get format %d", spec->format));
483 GST_ELEMENT_ERROR (oss, RESOURCE, SETTINGS, (NULL),
484 ("unexpected width %d", spec->width));
490 gst_oss_sink_unprepare (GstAudioSink * asink)
492 /* could do a SNDCTL_DSP_RESET, but the OSS manual recommends a close/open */
494 if (!gst_oss_sink_close (asink))
497 if (!gst_oss_sink_open (asink))
504 GST_DEBUG_OBJECT (asink, "Could not close the audio device");
509 GST_DEBUG_OBJECT (asink, "Could not reopen the audio device");
515 gst_oss_sink_write (GstAudioSink * asink, gpointer data, guint length)
517 return write (GST_OSSSINK (asink)->fd, data, length);
521 gst_oss_sink_delay (GstAudioSink * asink)
527 oss = GST_OSSSINK (asink);
529 #ifdef SNDCTL_DSP_GETODELAY
530 ret = ioctl (oss->fd, SNDCTL_DSP_GETODELAY, &delay);
537 ret = ioctl (oss->fd, SNDCTL_DSP_GETOSPACE, &info);
539 delay = (ret < 0 ? 0 : (info.fragstotal * info.fragsize) - info.bytes);
541 return delay / oss->bytes_per_sample;
545 gst_oss_sink_reset (GstAudioSink * asink)
551 oss = GST_OSSSINK (asink);
553 /* deadlocks on my machine... */
554 ret = ioctl (oss->fd, SNDCTL_DSP_RESET, 0);