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
71 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
74 GST_STATIC_CAPS ("audio/x-raw-int, "
75 "endianness = (int) BYTE_ORDER, "
76 "signed = (boolean) TRUE, "
79 "rate = (int) [ 1, MAX ], "
80 "channels = (int) [ 1, 2 ]; "
82 "signed = (boolean) { true, false }, "
85 "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ]")
88 static void gst_esdsink_finalize (GObject * object);
90 static GstCaps *gst_esdsink_getcaps (GstBaseSink * bsink);
92 static gboolean gst_esdsink_open (GstAudioSink * asink);
93 static gboolean gst_esdsink_close (GstAudioSink * asink);
94 static gboolean gst_esdsink_prepare (GstAudioSink * asink,
95 GstRingBufferSpec * spec);
96 static gboolean gst_esdsink_unprepare (GstAudioSink * asink);
97 static guint gst_esdsink_write (GstAudioSink * asink, gpointer data,
99 static guint gst_esdsink_delay (GstAudioSink * asink);
100 static void gst_esdsink_reset (GstAudioSink * asink);
102 static void gst_esdsink_set_property (GObject * object, guint prop_id,
103 const GValue * value, GParamSpec * pspec);
104 static void gst_esdsink_get_property (GObject * object, guint prop_id,
105 GValue * value, GParamSpec * pspec);
107 GST_BOILERPLATE (GstEsdSink, gst_esdsink, GstAudioSink, GST_TYPE_AUDIO_SINK);
110 gst_esdsink_base_init (gpointer g_class)
112 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
114 gst_element_class_add_pad_template (element_class,
115 gst_static_pad_template_get (&sink_factory));
116 gst_element_class_set_details_simple (element_class, "Esound audio sink",
118 "Plays audio to an esound server",
119 "Arwed von Merkatz <v.merkatz@gmx.net>");
123 gst_esdsink_class_init (GstEsdSinkClass * klass)
125 GObjectClass *gobject_class;
126 GstBaseSinkClass *gstbasesink_class;
127 GstAudioSinkClass *gstaudiosink_class;
129 gobject_class = (GObjectClass *) klass;
130 gstbasesink_class = (GstBaseSinkClass *) klass;
131 gstaudiosink_class = (GstAudioSinkClass *) klass;
133 parent_class = g_type_class_peek_parent (klass);
135 gobject_class->finalize = gst_esdsink_finalize;
137 gstbasesink_class->get_caps = GST_DEBUG_FUNCPTR (gst_esdsink_getcaps);
139 gstaudiosink_class->open = GST_DEBUG_FUNCPTR (gst_esdsink_open);
140 gstaudiosink_class->close = GST_DEBUG_FUNCPTR (gst_esdsink_close);
141 gstaudiosink_class->prepare = GST_DEBUG_FUNCPTR (gst_esdsink_prepare);
142 gstaudiosink_class->unprepare = GST_DEBUG_FUNCPTR (gst_esdsink_unprepare);
143 gstaudiosink_class->write = GST_DEBUG_FUNCPTR (gst_esdsink_write);
144 gstaudiosink_class->delay = GST_DEBUG_FUNCPTR (gst_esdsink_delay);
145 gstaudiosink_class->reset = GST_DEBUG_FUNCPTR (gst_esdsink_reset);
147 gobject_class->set_property = gst_esdsink_set_property;
148 gobject_class->get_property = gst_esdsink_get_property;
150 /* default value is filled in the _init method */
151 g_object_class_install_property (gobject_class, PROP_HOST,
152 g_param_spec_string ("host", "Host",
153 "The host running the esound daemon", NULL,
154 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
158 gst_esdsink_init (GstEsdSink * esdsink, GstEsdSinkClass * klass)
161 esdsink->ctrl_fd = -1;
162 esdsink->host = g_strdup (g_getenv ("ESPEAKER"));
166 gst_esdsink_finalize (GObject * object)
168 GstEsdSink *esdsink = GST_ESDSINK (object);
170 gst_caps_replace (&esdsink->cur_caps, NULL);
171 g_free (esdsink->host);
173 G_OBJECT_CLASS (parent_class)->finalize (object);
177 gst_esdsink_getcaps (GstBaseSink * bsink)
181 esdsink = GST_ESDSINK (bsink);
183 /* no fd, we're done with the template caps */
184 if (esdsink->ctrl_fd < 0 || esdsink->cur_caps == NULL) {
185 GST_LOG_OBJECT (esdsink, "getcaps called, returning template caps");
189 GST_LOG_OBJECT (esdsink, "returning %" GST_PTR_FORMAT, esdsink->cur_caps);
191 return gst_caps_ref (esdsink->cur_caps);
195 gst_esdsink_open (GstAudioSink * asink)
197 esd_server_info_t *server_info;
198 GstPadTemplate *pad_template;
203 esdsink = GST_ESDSINK (asink);
205 GST_DEBUG_OBJECT (esdsink, "open");
207 /* ensure libesd doesn't auto-spawn a sound daemon if none is running yet */
208 saved_env = g_strdup (g_getenv ("ESD_NO_SPAWN"));
209 g_setenv ("ESD_NO_SPAWN", "1", TRUE);
211 /* now try to connect to any existing/running sound daemons */
212 esdsink->ctrl_fd = esd_open_sound (esdsink->host);
214 /* and restore the previous state */
215 if (saved_env != NULL) {
216 g_setenv ("ESD_NO_SPAWN", saved_env, TRUE);
218 g_unsetenv ("ESD_NO_SPAWN");
222 if (esdsink->ctrl_fd < 0)
223 goto couldnt_connect;
225 /* get server info */
226 server_info = esd_get_server_info (esdsink->ctrl_fd);
230 GST_INFO_OBJECT (esdsink, "got server info rate: %i", server_info->rate);
232 pad_template = gst_static_pad_template_get (&sink_factory);
233 esdsink->cur_caps = gst_caps_copy (gst_pad_template_get_caps (pad_template));
234 gst_object_unref (pad_template);
236 for (i = 0; i < esdsink->cur_caps->structs->len; i++) {
239 s = gst_caps_get_structure (esdsink->cur_caps, i);
240 gst_structure_set (s, "rate", G_TYPE_INT, server_info->rate, NULL);
243 esd_free_server_info (server_info);
245 GST_INFO_OBJECT (esdsink, "server caps: %" GST_PTR_FORMAT, esdsink->cur_caps);
252 GST_ELEMENT_ERROR (esdsink, RESOURCE, OPEN_WRITE,
253 (_("Could not establish connection to sound server")),
254 ("can't open connection to esound server"));
259 GST_ELEMENT_ERROR (esdsink, RESOURCE, OPEN_WRITE,
260 (_("Failed to query sound server capabilities")),
261 ("couldn't get server info!"));
267 gst_esdsink_close (GstAudioSink * asink)
269 GstEsdSink *esdsink = GST_ESDSINK (asink);
271 GST_DEBUG_OBJECT (esdsink, "close");
273 gst_caps_replace (&esdsink->cur_caps, NULL);
274 esd_close (esdsink->ctrl_fd);
275 esdsink->ctrl_fd = -1;
281 gst_esdsink_prepare (GstAudioSink * asink, GstRingBufferSpec * spec)
283 GstEsdSink *esdsink = GST_ESDSINK (asink);
284 esd_format_t esdformat;
286 /* Name used by esound for this connection. */
287 const char connname[] = "GStreamer";
289 GST_DEBUG_OBJECT (esdsink, "prepare");
291 /* Bitmap describing audio format. */
292 esdformat = ESD_STREAM | ESD_PLAY;
294 switch (spec->depth) {
296 esdformat |= ESD_BITS8;
299 esdformat |= ESD_BITS16;
302 goto unsupported_depth;
305 switch (spec->channels) {
307 esdformat |= ESD_MONO;
310 esdformat |= ESD_STEREO;
313 goto unsupported_channels;
316 GST_INFO_OBJECT (esdsink,
317 "attempting to open data connection to esound server");
320 esd_play_stream (esdformat, spec->rate, esdsink->host, connname);
322 if ((esdsink->fd < 0) || (esdsink->ctrl_fd < 0))
325 esdsink->rate = spec->rate;
327 spec->segsize = ESD_BUF_SIZE;
328 spec->segtotal = (ESD_MAX_WRITE_SIZE / spec->segsize);
330 /* FIXME: this is wrong for signed ints (and the
331 * audioringbuffers should do it for us anyway) */
332 spec->silence_sample[0] = 0;
333 spec->silence_sample[1] = 0;
334 spec->silence_sample[2] = 0;
335 spec->silence_sample[3] = 0;
337 GST_INFO_OBJECT (esdsink, "successfully opened connection to esound server");
344 GST_ELEMENT_ERROR (esdsink, STREAM, WRONG_TYPE, (NULL),
345 ("can't handle sample depth of %d, only 8 or 16 supported",
349 unsupported_channels:
351 GST_ELEMENT_ERROR (esdsink, STREAM, WRONG_TYPE, (NULL),
352 ("can't handle %d channels, only 1 or 2 supported", spec->channels));
357 GST_ELEMENT_ERROR (esdsink, RESOURCE, OPEN_WRITE,
358 (_("Could not establish connection to sound server")),
359 ("can't open connection to esound server"));
365 gst_esdsink_unprepare (GstAudioSink * asink)
367 GstEsdSink *esdsink = GST_ESDSINK (asink);
369 if ((esdsink->fd < 0) && (esdsink->ctrl_fd < 0))
375 GST_INFO_OBJECT (esdsink, "closed sound device");
382 gst_esdsink_write (GstAudioSink * asink, gpointer data, guint length)
384 GstEsdSink *esdsink = GST_ESDSINK (asink);
389 while (to_write > 0) {
392 done = write (esdsink->fd, data, to_write);
398 data = (char *) data + done;
405 GST_ELEMENT_ERROR (esdsink, RESOURCE, WRITE,
406 ("Failed to write data to the esound daemon"), GST_ERROR_SYSTEM);
412 gst_esdsink_delay (GstAudioSink * asink)
414 GstEsdSink *esdsink = GST_ESDSINK (asink);
417 latency = esd_get_latency (esdsink->ctrl_fd);
419 if (latency == (guint) - 1) {
420 GST_WARNING_OBJECT (asink, "couldn't get latency");
424 /* latency is measured in samples at a rate of 44100, this
425 * cannot overflow. */
426 latency = latency * G_GINT64_CONSTANT (44100) / esdsink->rate;
428 GST_DEBUG_OBJECT (asink, "got latency: %u", latency);
434 gst_esdsink_reset (GstAudioSink * asink)
436 GST_DEBUG_OBJECT (asink, "reset called");
440 gst_esdsink_set_property (GObject * object, guint prop_id, const GValue * value,
443 GstEsdSink *esdsink = GST_ESDSINK (object);
447 g_free (esdsink->host);
448 esdsink->host = g_value_dup_string (value);
456 gst_esdsink_get_property (GObject * object, guint prop_id, GValue * value,
459 GstEsdSink *esdsink = GST_ESDSINK (object);
463 g_value_set_string (value, esdsink->host);
466 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);