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
29 * This element outputs sound to an already-running Enlightened Sound Daemon
30 * (ESound Daemon, esd). Note that a sound daemon will never be auto-spawned
31 * through this element (regardless of the system configuration), since this
32 * is actively prevented by the element. If you must use esd, you need to
33 * make sure it is started automatically with your session or otherwise.
35 * TODO: insert some comments about how sucky esd is and that all the cool
36 * kids use pulseaudio or whatever these days.
39 * <title>Example launch line</title>
41 * gst-launch -v filesrc location=foo.ogg ! decodebin ! audioconvert ! audioresample ! esdsink
42 * ]| play an Ogg/Vorbis audio file via esd
55 #include <gst/gst-i18n-plugin.h>
57 /* wtay: from my esd.h (debian unstable libesd0-dev 0.2.36-3) */
58 #ifndef ESD_MAX_WRITE_SIZE
59 #define ESD_MAX_WRITE_SIZE (21 * 4096)
62 GST_DEBUG_CATEGORY_EXTERN (esd_debug);
63 #define GST_CAT_DEFAULT esd_debug
65 /* elementfactory information */
66 static const GstElementDetails esdsink_details =
67 GST_ELEMENT_DETAILS ("Esound audio sink",
69 "Plays audio to an esound server",
70 "Arwed von Merkatz <v.merkatz@gmx.net>");
78 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
81 GST_STATIC_CAPS ("audio/x-raw-int, "
82 "endianness = (int) BYTE_ORDER, "
83 "signed = (boolean) TRUE, "
86 "rate = (int) [ 1, MAX ], "
87 "channels = (int) [ 1, 2 ]; "
89 "signed = (boolean) { true, false }, "
92 "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ]")
95 static void gst_esdsink_finalize (GObject * object);
97 static GstCaps *gst_esdsink_getcaps (GstBaseSink * bsink);
99 static gboolean gst_esdsink_open (GstAudioSink * asink);
100 static gboolean gst_esdsink_close (GstAudioSink * asink);
101 static gboolean gst_esdsink_prepare (GstAudioSink * asink,
102 GstRingBufferSpec * spec);
103 static gboolean gst_esdsink_unprepare (GstAudioSink * asink);
104 static guint gst_esdsink_write (GstAudioSink * asink, gpointer data,
106 static guint gst_esdsink_delay (GstAudioSink * asink);
107 static void gst_esdsink_reset (GstAudioSink * asink);
109 static void gst_esdsink_set_property (GObject * object, guint prop_id,
110 const GValue * value, GParamSpec * pspec);
111 static void gst_esdsink_get_property (GObject * object, guint prop_id,
112 GValue * value, GParamSpec * pspec);
114 GST_BOILERPLATE (GstEsdSink, gst_esdsink, GstAudioSink, GST_TYPE_AUDIO_SINK);
117 gst_esdsink_base_init (gpointer g_class)
119 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
121 gst_element_class_add_pad_template (element_class,
122 gst_static_pad_template_get (&sink_factory));
123 gst_element_class_set_details (element_class, &esdsink_details);
127 gst_esdsink_class_init (GstEsdSinkClass * klass)
129 GObjectClass *gobject_class;
130 GstBaseSinkClass *gstbasesink_class;
131 GstAudioSinkClass *gstaudiosink_class;
133 gobject_class = (GObjectClass *) klass;
134 gstbasesink_class = (GstBaseSinkClass *) klass;
135 gstaudiosink_class = (GstAudioSinkClass *) klass;
137 parent_class = g_type_class_peek_parent (klass);
139 gobject_class->finalize = gst_esdsink_finalize;
141 gstbasesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_esdsink_getcaps);
143 gstaudiosink_class->open = GST_DEBUG_FUNCPTR (gst_esdsink_open);
144 gstaudiosink_class->close = GST_DEBUG_FUNCPTR (gst_esdsink_close);
145 gstaudiosink_class->prepare = GST_DEBUG_FUNCPTR (gst_esdsink_prepare);
146 gstaudiosink_class->unprepare = GST_DEBUG_FUNCPTR (gst_esdsink_unprepare);
147 gstaudiosink_class->write = GST_DEBUG_FUNCPTR (gst_esdsink_write);
148 gstaudiosink_class->delay = GST_DEBUG_FUNCPTR (gst_esdsink_delay);
149 gstaudiosink_class->reset = GST_DEBUG_FUNCPTR (gst_esdsink_reset);
151 gobject_class->set_property = gst_esdsink_set_property;
152 gobject_class->get_property = gst_esdsink_get_property;
154 /* default value is filled in the _init method */
155 g_object_class_install_property (gobject_class, PROP_HOST,
156 g_param_spec_string ("host", "Host",
157 "The host running the esound daemon", NULL, G_PARAM_READWRITE));
161 gst_esdsink_init (GstEsdSink * esdsink, GstEsdSinkClass * klass)
164 esdsink->ctrl_fd = -1;
165 esdsink->host = g_strdup (g_getenv ("ESPEAKER"));
169 gst_esdsink_finalize (GObject * object)
171 GstEsdSink *esdsink = GST_ESDSINK (object);
173 gst_caps_replace (&esdsink->cur_caps, NULL);
174 g_free (esdsink->host);
176 G_OBJECT_CLASS (parent_class)->finalize (object);
180 gst_esdsink_getcaps (GstBaseSink * bsink)
184 esdsink = GST_ESDSINK (bsink);
186 /* no fd, we're done with the template caps */
187 if (esdsink->ctrl_fd < 0 || esdsink->cur_caps == NULL) {
188 GST_LOG_OBJECT (esdsink, "getcaps called, returning template caps");
192 GST_LOG_OBJECT (esdsink, "returning %" GST_PTR_FORMAT, esdsink->cur_caps);
194 return gst_caps_ref (esdsink->cur_caps);
198 gst_esdsink_open (GstAudioSink * asink)
200 esd_server_info_t *server_info;
201 GstPadTemplate *pad_template;
206 esdsink = GST_ESDSINK (asink);
208 GST_DEBUG_OBJECT (esdsink, "open");
210 /* ensure libesd doesn't auto-spawn a sound daemon if none is running yet */
211 saved_env = g_strdup (g_getenv ("ESD_NO_SPAWN"));
212 g_setenv ("ESD_NO_SPAWN", "1", TRUE);
214 /* now try to connect to any existing/running sound daemons */
215 esdsink->ctrl_fd = esd_open_sound (esdsink->host);
217 /* and restore the previous state */
218 if (saved_env != NULL) {
219 g_setenv ("ESD_NO_SPAWN", saved_env, TRUE);
221 g_unsetenv ("ESD_NO_SPAWN");
225 if (esdsink->ctrl_fd < 0)
226 goto couldnt_connect;
228 /* get server info */
229 server_info = esd_get_server_info (esdsink->ctrl_fd);
233 GST_INFO_OBJECT (esdsink, "got server info rate: %i", server_info->rate);
235 pad_template = gst_static_pad_template_get (&sink_factory);
236 esdsink->cur_caps = gst_caps_copy (gst_pad_template_get_caps (pad_template));
237 gst_object_unref (pad_template);
239 for (i = 0; i < esdsink->cur_caps->structs->len; i++) {
242 s = gst_caps_get_structure (esdsink->cur_caps, i);
243 gst_structure_set (s, "rate", G_TYPE_INT, server_info->rate, NULL);
246 esd_free_server_info (server_info);
248 GST_INFO_OBJECT (esdsink, "server caps: %" GST_PTR_FORMAT, esdsink->cur_caps);
255 GST_ELEMENT_ERROR (esdsink, RESOURCE, OPEN_WRITE,
256 (_("Could not establish connection to sound server")),
257 ("can't open connection to esound server"));
262 GST_ELEMENT_ERROR (esdsink, RESOURCE, OPEN_WRITE,
263 (_("Failed to query sound server capabilities")),
264 ("couldn't get server info!"));
270 gst_esdsink_close (GstAudioSink * asink)
272 GstEsdSink *esdsink = GST_ESDSINK (asink);
274 GST_DEBUG_OBJECT (esdsink, "close");
276 gst_caps_replace (&esdsink->cur_caps, NULL);
277 esd_close (esdsink->ctrl_fd);
278 esdsink->ctrl_fd = -1;
284 gst_esdsink_prepare (GstAudioSink * asink, GstRingBufferSpec * spec)
286 GstEsdSink *esdsink = GST_ESDSINK (asink);
287 esd_format_t esdformat;
289 /* Name used by esound for this connection. */
290 const char connname[] = "GStreamer";
292 GST_DEBUG_OBJECT (esdsink, "prepare");
294 /* Bitmap describing audio format. */
295 esdformat = ESD_STREAM | ESD_PLAY;
297 switch (spec->depth) {
299 esdformat |= ESD_BITS8;
302 esdformat |= ESD_BITS16;
305 goto unsupported_depth;
308 switch (spec->channels) {
310 esdformat |= ESD_MONO;
313 esdformat |= ESD_STEREO;
316 goto unsupported_channels;
319 GST_INFO_OBJECT (esdsink,
320 "attempting to open data connection to esound server");
323 esd_play_stream (esdformat, spec->rate, esdsink->host, connname);
325 if ((esdsink->fd < 0) || (esdsink->ctrl_fd < 0))
328 esdsink->rate = spec->rate;
330 spec->segsize = ESD_BUF_SIZE;
331 spec->segtotal = (ESD_MAX_WRITE_SIZE / spec->segsize);
333 /* FIXME: this is wrong for signed ints (and the
334 * audioringbuffers should do it for us anyway) */
335 spec->silence_sample[0] = 0;
336 spec->silence_sample[1] = 0;
337 spec->silence_sample[2] = 0;
338 spec->silence_sample[3] = 0;
340 GST_INFO_OBJECT (esdsink, "successfully opened connection to esound server");
347 GST_ELEMENT_ERROR (esdsink, STREAM, WRONG_TYPE, (NULL),
348 ("can't handle sample depth of %d, only 8 or 16 supported",
352 unsupported_channels:
354 GST_ELEMENT_ERROR (esdsink, STREAM, WRONG_TYPE, (NULL),
355 ("can't handle %d channels, only 1 or 2 supported", spec->channels));
360 GST_ELEMENT_ERROR (esdsink, RESOURCE, OPEN_WRITE,
361 (_("Could not establish connection to sound server")),
362 ("can't open connection to esound server"));
368 gst_esdsink_unprepare (GstAudioSink * asink)
370 GstEsdSink *esdsink = GST_ESDSINK (asink);
372 if ((esdsink->fd < 0) && (esdsink->ctrl_fd < 0))
378 GST_INFO_OBJECT (esdsink, "closed sound device");
385 gst_esdsink_write (GstAudioSink * asink, gpointer data, guint length)
387 GstEsdSink *esdsink = GST_ESDSINK (asink);
392 while (to_write > 0) {
395 done = write (esdsink->fd, data, to_write);
401 data = (char *) data + done;
408 GST_ELEMENT_ERROR (esdsink, RESOURCE, WRITE,
409 ("Failed to write data to the esound daemon"), GST_ERROR_SYSTEM);
415 gst_esdsink_delay (GstAudioSink * asink)
417 GstEsdSink *esdsink = GST_ESDSINK (asink);
420 latency = esd_get_latency (esdsink->ctrl_fd);
422 if (latency == (guint) - 1) {
423 GST_WARNING_OBJECT (asink, "couldn't get latency");
427 /* latency is measured in samples at a rate of 44100, this
428 * cannot overflow. */
429 latency = latency * G_GINT64_CONSTANT (44100) / esdsink->rate;
431 GST_DEBUG_OBJECT (asink, "got latency: %u", latency);
437 gst_esdsink_reset (GstAudioSink * asink)
439 GST_DEBUG_OBJECT (asink, "reset called");
443 gst_esdsink_set_property (GObject * object, guint prop_id, const GValue * value,
446 GstEsdSink *esdsink = GST_ESDSINK (object);
450 g_free (esdsink->host);
451 esdsink->host = g_value_dup_string (value);
459 gst_esdsink_get_property (GObject * object, guint prop_id, GValue * value,
462 GstEsdSink *esdsink = GST_ESDSINK (object);
466 g_value_set_string (value, esdsink->host);
469 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);