1 /* -*- Mode: C; c-basic-offset: 4 -*- */
3 Copyright (C) 2002, 2003 Andy Wingo <wingo@pobox.com>
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public
16 License along with this library; if not, write to the Free
17 Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 static GstBinClass *parent_class = NULL;
28 static void gst_jack_bin_init(GstJackBin *this);
29 static void gst_jack_bin_class_init(GstJackBinClass *klass);
31 static GstElementStateReturn gst_jack_bin_change_state(GstElement *element);
34 static int process (jack_nframes_t nframes, void *arg);
35 static int sample_rate (jack_nframes_t nframes, void *arg);
36 static int buffer_size (jack_nframes_t nframes, void *arg);
37 static void shutdown (void *arg);
39 static void sighup_handler (int sig);
40 static GstJackBin *_jackbin = NULL;
41 static gboolean watchdog_please_set_the_jackbin_to_ready = FALSE;
43 /* fixme: we need a watchdog thread to see if we have received a SIGHUP, and if
44 * so set the state of the bin to READY. */
47 gst_jack_bin_get_type (void)
49 static GType jack_bin_type = 0;
51 static const GTypeInfo jack_bin_info = {
52 sizeof(GstJackBinClass),
55 (GClassInitFunc)gst_jack_bin_class_init,
60 (GInstanceInitFunc)gst_jack_bin_init,
62 jack_bin_type = g_type_register_static (GST_TYPE_BIN, "GstJackBin", &jack_bin_info, 0);
68 gst_jack_bin_class_init(GstJackBinClass *klass)
70 GObjectClass *object_class;
71 GstElementClass *element_class;
73 object_class = (GObjectClass *)klass;
74 element_class = (GstElementClass *)klass;
76 parent_class = g_type_class_ref(GST_TYPE_BIN);
78 element_class->change_state = gst_jack_bin_change_state;
82 gst_jack_bin_init(GstJackBin *this)
84 GST_DEBUG ("initializing jack bin");
86 /* jack bins are managing bins and iterate themselves */
87 GST_FLAG_SET (this, GST_BIN_FLAG_MANAGER);
88 GST_FLAG_SET (this, GST_BIN_SELF_SCHEDULABLE);
90 /* make a new scheduler and associate it with the bin */
91 gst_scheduler_factory_make (NULL, GST_ELEMENT (this));
94 static GstElementStateReturn
95 gst_jack_bin_change_state (GstElement *element)
101 g_return_val_if_fail (element != NULL, FALSE);
102 this = GST_JACK_BIN (element);
104 switch (GST_STATE_PENDING (element)) {
106 JACK_DEBUG ("jackbin: NULL state");
108 JACK_DEBUG ("jackbin: closing client");
109 jack_client_close (this->client);
114 signal (SIGHUP, SIG_DFL);
117 if (GST_ELEMENT_CLASS (parent_class)->change_state)
118 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
121 case GST_STATE_READY:
122 JACK_DEBUG ("jackbin: READY");
125 signal (SIGHUP, sighup_handler);
128 if (!(this->client = jack_client_new ("gst-jack"))) {
129 g_warning ("jack server not running?");
130 return GST_STATE_FAILURE;
133 gst_scheduler_setup (GST_ELEMENT_SCHED (this));
135 jack_set_process_callback (this->client, process, this);
136 jack_set_sample_rate_callback (this->client, sample_rate, this);
137 jack_set_buffer_size_callback (this->client, buffer_size, this);
138 this->nframes = jack_get_buffer_size (this->client);
139 jack_on_shutdown (this->client, shutdown, this);
142 if (GST_FLAG_IS_SET (GST_OBJECT (this), GST_JACK_OPEN)) {
145 JACK_DEBUG ("jackbin: unregistering pad %s:%s", GST_JACK_PAD (l)->name, GST_JACK_PAD (l)->peer_name);
146 jack_port_unregister (this->client, GST_JACK_PAD (l)->port);
151 JACK_DEBUG ("jackbin: unregistering pad %s:%s", GST_JACK_PAD (l)->name, GST_JACK_PAD (l)->peer_name);
152 jack_port_unregister (this->client, GST_JACK_PAD (l)->port);
155 GST_FLAG_UNSET (GST_OBJECT (this), GST_JACK_OPEN);
157 if (GST_FLAG_IS_SET (GST_OBJECT (this), GST_JACK_ACTIVE)) {
158 JACK_DEBUG ("jackbin: deactivating client");
159 jack_deactivate (this->client);
160 GST_FLAG_UNSET (GST_OBJECT (this), GST_JACK_ACTIVE);
164 if (GST_ELEMENT_CLASS (parent_class)->change_state)
165 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
168 case GST_STATE_PAUSED:
169 JACK_DEBUG ("jackbin: PAUSED");
171 if (!GST_FLAG_IS_SET (GST_OBJECT (this), GST_JACK_OPEN)) {
174 pad = GST_JACK_PAD (l);
175 JACK_DEBUG ("jackbin: registering input port %s (peer %s)", pad->name, pad->peer_name);
176 pad->port = jack_port_register (this->client, pad->name, JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput|JackPortIsTerminal, 0);
181 pad = GST_JACK_PAD (l);
182 JACK_DEBUG ("jackbin: registering output port %s (peer %s)", pad->name, pad->peer_name);
183 pad->port = jack_port_register (this->client, pad->name, JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput|JackPortIsTerminal, 0);
187 /* must activate before connecting */
188 if (!GST_FLAG_IS_SET (GST_OBJECT (this), GST_JACK_ACTIVE)) {
189 JACK_DEBUG ("jackbin: activating client");
190 jack_activate (this->client);
191 GST_FLAG_SET (GST_OBJECT (this), GST_JACK_ACTIVE);
196 pad = GST_JACK_PAD (l);
197 JACK_DEBUG ("connecting jack port %s to gst jack port %s", pad->peer_name, jack_port_name (pad->port));
198 if (jack_connect (this->client, pad->peer_name, jack_port_name (pad->port))) {
199 g_warning ("jackbin: could not connect %s and %s", pad->peer_name, jack_port_name (pad->port));
200 return GST_STATE_FAILURE;
206 pad = GST_JACK_PAD (l);
207 JACK_DEBUG ("connecting gst jack port %s to jack port %s", jack_port_name (pad->port), pad->peer_name);
208 if (jack_connect (this->client, jack_port_name (pad->port), pad->peer_name)) {
209 g_warning ("jackbin: could not connect %s and %s", pad->peer_name, jack_port_name (pad->port));
210 return GST_STATE_FAILURE;
215 JACK_DEBUG ("jackbin: setting OPEN flag");
216 GST_FLAG_SET (GST_OBJECT (this), GST_JACK_OPEN);
218 if (GST_ELEMENT_CLASS (parent_class)->change_state)
219 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
221 if (GST_ELEMENT_CLASS (parent_class)->change_state)
222 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
226 case GST_STATE_PLAYING:
227 JACK_DEBUG ("jackbin: PLAYING");
229 if (GST_ELEMENT_CLASS (parent_class)->change_state)
230 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
234 JACK_DEBUG ("jackbin: state change finished");
236 return GST_STATE_SUCCESS;
241 /* keep in mind that these run in another thread, mm-kay? */
244 process (jack_nframes_t nframes, void *arg)
246 GstJackBin *bin = (GstJackBin*) arg;
252 JACK_DEBUG ("jackbin: process()");
254 if (GST_STATE (bin) != GST_STATE_PLAYING) {
255 JACK_DEBUG ("jackbin: bin is not PLAYING yet, returning");
258 JACK_DEBUG ("jackbin: we are PLAYING, let's process()");
263 pad = GST_JACK_PAD (l);
264 pad->data = jack_port_get_buffer (pad->port, nframes);
270 pad = GST_JACK_PAD (l);
271 pad->data = jack_port_get_buffer (pad->port, nframes);
275 bin->nframes = nframes;
277 JACK_DEBUG ("jackbin: iterating to process %ld frames of audio...", nframes);
278 if (!gst_bin_iterate (GST_BIN_CAST (bin))) {
279 g_warning ("bin failed to iterate");
283 /* that's all folks */
289 sample_rate (jack_nframes_t nframes, void *arg)
291 GstJackBin *bin = (GstJackBin*) arg;
292 JACK_DEBUG ("the sample rate is now %lu/sec\n", nframes);
298 buffer_size (jack_nframes_t nframes, void *arg)
300 GstJackBin *bin = (GstJackBin*) arg;
301 JACK_DEBUG ("the buffer size is now %lu\n", nframes);
302 bin->nframes = nframes;
309 /* GstJackClient *client = (GstJackClient*) arg; */
310 printf ("shutdown %p\n", arg);
311 /* gst_element_set_state (GST_ELEMENT (client->manager), GST_STATE_READY); */
314 static void sighup_handler (int sig)
316 g_message ("got sighup, setting state to READY");
317 watchdog_please_set_the_jackbin_to_ready = TRUE;