2 * Copyright (C) <2005> Arwed v. Merkatz <v.merkatz@gmx.net>
4 * Roughly based on the gstreamer 0.8 esdsink plugin:
5 * Copyright (C) <2001> Richard Boulton <richard-gst@tartarus.org>
7 * esdsink.c: an EsounD audio sink
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Library General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Library General Public License for more details.
19 * You should have received a copy of the GNU Library General Public
20 * License along with this library; if not, write to the
21 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 * Boston, MA 02111-1307, USA.
26 * SECTION:element-esdsink
27 * @see_also: #GstAlsaSink, #GstAutoAudioSink
31 * This element outputs sound to an already-running Enlightened Sound Daemon
32 * (ESound Daemon, esd). Note that a sound daemon will never be auto-spawned
33 * through this element (regardless of the system configuration), since this
34 * is actively prevented by the element. If you must use esd, you need to
35 * make sure it is started automatically with your session or otherwise.
38 * TODO: insert some comments about how sucky esd is and that all the cool
39 * kids use pulseaudio or whatever these days.
42 * Simple example pipeline that plays an Ogg/Vorbis file via esd:
44 * gst-launch -v filesrc location=foo.ogg ! decodebin ! audioconvert ! audioresample ! esdsink
59 #include <gst/gst-i18n-plugin.h>
61 /* wtay: from my esd.h (debian unstable libesd0-dev 0.2.36-3) */
62 #ifndef ESD_MAX_WRITE_SIZE
63 #define ESD_MAX_WRITE_SIZE (21 * 4096)
66 GST_DEBUG_CATEGORY_EXTERN (esd_debug);
67 #define GST_CAT_DEFAULT esd_debug
69 /* elementfactory information */
70 static const GstElementDetails esdsink_details =
71 GST_ELEMENT_DETAILS ("Esound audio sink",
73 "Plays audio to an esound server",
74 "Arwed von Merkatz <v.merkatz@gmx.net>");
82 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
85 GST_STATIC_CAPS ("audio/x-raw-int, "
86 "endianness = (int) BYTE_ORDER, "
87 "signed = (boolean) TRUE, "
90 "rate = (int) [ 1, MAX ], "
91 "channels = (int) [ 1, 2 ]; "
93 "signed = (boolean) { true, false }, "
96 "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ]")
99 static void gst_esdsink_finalize (GObject * object);
101 static GstCaps *gst_esdsink_getcaps (GstBaseSink * bsink);
103 static gboolean gst_esdsink_open (GstAudioSink * asink);
104 static gboolean gst_esdsink_close (GstAudioSink * asink);
105 static gboolean gst_esdsink_prepare (GstAudioSink * asink,
106 GstRingBufferSpec * spec);
107 static gboolean gst_esdsink_unprepare (GstAudioSink * asink);
108 static guint gst_esdsink_write (GstAudioSink * asink, gpointer data,
110 static guint gst_esdsink_delay (GstAudioSink * asink);
111 static void gst_esdsink_reset (GstAudioSink * asink);
113 static void gst_esdsink_set_property (GObject * object, guint prop_id,
114 const GValue * value, GParamSpec * pspec);
115 static void gst_esdsink_get_property (GObject * object, guint prop_id,
116 GValue * value, GParamSpec * pspec);
118 GST_BOILERPLATE (GstEsdSink, gst_esdsink, GstAudioSink, GST_TYPE_AUDIO_SINK);
121 gst_esdsink_base_init (gpointer g_class)
123 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
125 gst_element_class_add_pad_template (element_class,
126 gst_static_pad_template_get (&sink_factory));
127 gst_element_class_set_details (element_class, &esdsink_details);
131 gst_esdsink_class_init (GstEsdSinkClass * klass)
133 GObjectClass *gobject_class;
134 GstBaseSinkClass *gstbasesink_class;
135 GstBaseAudioSinkClass *gstbaseaudiosink_class;
136 GstAudioSinkClass *gstaudiosink_class;
138 gobject_class = (GObjectClass *) klass;
139 gstbasesink_class = (GstBaseSinkClass *) klass;
140 gstbaseaudiosink_class = (GstBaseAudioSinkClass *) klass;
141 gstaudiosink_class = (GstAudioSinkClass *) klass;
143 parent_class = g_type_class_peek_parent (klass);
145 gobject_class->finalize = gst_esdsink_finalize;
147 gstbasesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_esdsink_getcaps);
149 gstaudiosink_class->open = GST_DEBUG_FUNCPTR (gst_esdsink_open);
150 gstaudiosink_class->close = GST_DEBUG_FUNCPTR (gst_esdsink_close);
151 gstaudiosink_class->prepare = GST_DEBUG_FUNCPTR (gst_esdsink_prepare);
152 gstaudiosink_class->unprepare = GST_DEBUG_FUNCPTR (gst_esdsink_unprepare);
153 gstaudiosink_class->write = GST_DEBUG_FUNCPTR (gst_esdsink_write);
154 gstaudiosink_class->delay = GST_DEBUG_FUNCPTR (gst_esdsink_delay);
155 gstaudiosink_class->reset = GST_DEBUG_FUNCPTR (gst_esdsink_reset);
157 gobject_class->set_property = gst_esdsink_set_property;
158 gobject_class->get_property = gst_esdsink_get_property;
160 /* default value is filled in the _init method */
161 g_object_class_install_property (gobject_class, PROP_HOST,
162 g_param_spec_string ("host", "Host",
163 "The host running the esound daemon", NULL, G_PARAM_READWRITE));
167 gst_esdsink_init (GstEsdSink * esdsink, GstEsdSinkClass * klass)
170 esdsink->ctrl_fd = -1;
171 esdsink->host = g_strdup (g_getenv ("ESPEAKER"));
175 gst_esdsink_finalize (GObject * object)
177 GstEsdSink *esdsink = GST_ESDSINK (object);
179 gst_caps_replace (&esdsink->cur_caps, NULL);
180 g_free (esdsink->host);
182 G_OBJECT_CLASS (parent_class)->finalize (object);
186 gst_esdsink_getcaps (GstBaseSink * bsink)
190 esdsink = GST_ESDSINK (bsink);
192 /* no fd, we're done with the template caps */
193 if (esdsink->ctrl_fd < 0 || esdsink->cur_caps == NULL) {
194 GST_LOG_OBJECT (esdsink, "getcaps called, returning template caps");
198 GST_LOG_OBJECT (esdsink, "returning %" GST_PTR_FORMAT, esdsink->cur_caps);
200 return gst_caps_ref (esdsink->cur_caps);
204 gst_esdsink_open (GstAudioSink * asink)
206 esd_server_info_t *server_info;
207 GstPadTemplate *pad_template;
212 esdsink = GST_ESDSINK (asink);
214 GST_DEBUG_OBJECT (esdsink, "open");
216 /* ensure libesd doesn't auto-spawn a sound daemon if none is running yet */
217 saved_env = g_strdup (g_getenv ("ESD_NO_SPAWN"));
218 g_setenv ("ESD_NO_SPAWN", "1", TRUE);
220 /* now try to connect to any existing/running sound daemons */
221 esdsink->ctrl_fd = esd_open_sound (esdsink->host);
223 /* and restore the previous state */
224 if (saved_env != NULL) {
225 g_setenv ("ESD_NO_SPAWN", saved_env, TRUE);
227 g_unsetenv ("ESD_NO_SPAWN");
231 if (esdsink->ctrl_fd < 0)
232 goto couldnt_connect;
234 /* get server info */
235 server_info = esd_get_server_info (esdsink->ctrl_fd);
239 GST_INFO_OBJECT (esdsink, "got server info rate: %i", server_info->rate);
241 pad_template = gst_static_pad_template_get (&sink_factory);
242 esdsink->cur_caps = gst_caps_copy (gst_pad_template_get_caps (pad_template));
243 gst_object_unref (pad_template);
245 for (i = 0; i < esdsink->cur_caps->structs->len; i++) {
248 s = gst_caps_get_structure (esdsink->cur_caps, i);
249 gst_structure_set (s, "rate", G_TYPE_INT, server_info->rate, NULL);
252 esd_free_server_info (server_info);
254 GST_INFO_OBJECT (esdsink, "server caps: %" GST_PTR_FORMAT, esdsink->cur_caps);
261 GST_ELEMENT_ERROR (esdsink, RESOURCE, OPEN_WRITE,
262 (_("Could not establish connection to sound server")),
263 ("can't open connection to esound server"));
268 GST_ELEMENT_ERROR (esdsink, RESOURCE, OPEN_WRITE,
269 (_("Failed to query sound server capabilities")),
270 ("couldn't get server info!"));
276 gst_esdsink_close (GstAudioSink * asink)
278 GstEsdSink *esdsink = GST_ESDSINK (asink);
280 GST_DEBUG_OBJECT (esdsink, "close");
282 gst_caps_replace (&esdsink->cur_caps, NULL);
283 esd_close (esdsink->ctrl_fd);
284 esdsink->ctrl_fd = -1;
290 gst_esdsink_prepare (GstAudioSink * asink, GstRingBufferSpec * spec)
292 GstEsdSink *esdsink = GST_ESDSINK (asink);
293 esd_format_t esdformat;
295 /* Name used by esound for this connection. */
296 const char connname[] = "GStreamer";
298 GST_DEBUG_OBJECT (esdsink, "prepare");
300 /* Bitmap describing audio format. */
301 esdformat = ESD_STREAM | ESD_PLAY;
303 switch (spec->depth) {
305 esdformat |= ESD_BITS8;
308 esdformat |= ESD_BITS16;
311 goto unsupported_depth;
314 switch (spec->channels) {
316 esdformat |= ESD_MONO;
319 esdformat |= ESD_STEREO;
322 goto unsupported_channels;
325 GST_INFO_OBJECT (esdsink,
326 "attempting to open data connection to esound server");
329 esd_play_stream (esdformat, spec->rate, esdsink->host, connname);
331 if ((esdsink->fd < 0) || (esdsink->ctrl_fd < 0))
334 esdsink->rate = spec->rate;
336 spec->segsize = ESD_BUF_SIZE;
337 spec->segtotal = (ESD_MAX_WRITE_SIZE / spec->segsize);
339 /* FIXME: this is wrong for signed ints (and the
340 * audioringbuffers should do it for us anyway) */
341 spec->silence_sample[0] = 0;
342 spec->silence_sample[1] = 0;
343 spec->silence_sample[2] = 0;
344 spec->silence_sample[3] = 0;
346 GST_INFO_OBJECT (esdsink, "successfully opened connection to esound server");
353 GST_ELEMENT_ERROR (esdsink, STREAM, WRONG_TYPE, (NULL),
354 ("can't handle sample depth of %d, only 8 or 16 supported",
358 unsupported_channels:
360 GST_ELEMENT_ERROR (esdsink, STREAM, WRONG_TYPE, (NULL),
361 ("can't handle %d channels, only 1 or 2 supported", spec->channels));
366 GST_ELEMENT_ERROR (esdsink, RESOURCE, OPEN_WRITE,
367 (_("Could not establish connection to sound server")),
368 ("can't open connection to esound server"));
374 gst_esdsink_unprepare (GstAudioSink * asink)
376 GstEsdSink *esdsink = GST_ESDSINK (asink);
378 if ((esdsink->fd < 0) && (esdsink->ctrl_fd < 0))
384 GST_INFO_OBJECT (esdsink, "closed sound device");
391 gst_esdsink_write (GstAudioSink * asink, gpointer data, guint length)
393 GstEsdSink *esdsink = GST_ESDSINK (asink);
398 while (to_write > 0) {
401 done = write (esdsink->fd, data, to_write);
407 data = (char *) data + done;
414 GST_ELEMENT_ERROR (esdsink, RESOURCE, WRITE,
415 ("Failed to write data to the esound daemon"), GST_ERROR_SYSTEM);
421 gst_esdsink_delay (GstAudioSink * asink)
423 GstEsdSink *esdsink = GST_ESDSINK (asink);
426 latency = esd_get_latency (esdsink->ctrl_fd);
428 if (latency == (guint) - 1) {
429 GST_WARNING_OBJECT (asink, "couldn't get latency");
433 /* latency is measured in samples at a rate of 44100, this
434 * cannot overflow. */
435 latency = latency * G_GINT64_CONSTANT (44100) / esdsink->rate;
437 GST_DEBUG_OBJECT (asink, "got latency: %u", latency);
443 gst_esdsink_reset (GstAudioSink * asink)
445 GST_DEBUG_OBJECT (asink, "reset called");
449 gst_esdsink_set_property (GObject * object, guint prop_id, const GValue * value,
452 GstEsdSink *esdsink = GST_ESDSINK (object);
456 g_free (esdsink->host);
457 esdsink->host = g_value_dup_string (value);
465 gst_esdsink_get_property (GObject * object, guint prop_id, GValue * value,
468 GstEsdSink *esdsink = GST_ESDSINK (object);
472 g_value_set_string (value, esdsink->host);
475 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);