2 This file is part of PulseAudio.
4 Copyright 2006 Lennart Poettering
6 PulseAudio is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published
8 by the Free Software Foundation; either version 2.1 of the License,
9 or (at your option) any later version.
11 PulseAudio is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with PulseAudio; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
35 #include <jack/jack.h>
37 #include <pulse/xmalloc.h>
39 #include <pulsecore/core-error.h>
40 #include <pulsecore/sink.h>
41 #include <pulsecore/module.h>
42 #include <pulsecore/core-util.h>
43 #include <pulsecore/modargs.h>
44 #include <pulsecore/log.h>
45 #include <pulsecore/thread.h>
46 #include <pulsecore/thread-mq.h>
47 #include <pulsecore/rtpoll.h>
48 #include <pulsecore/sample-util.h>
50 #include "module-jack-sink-symdef.h"
54 * Because JACK has a very unflexible event loop management which
55 * doesn't allow us to add our own event sources to the event thread
56 * we cannot use the JACK real-time thread for dispatching our PA
57 * work. Instead, we run an additional RT thread which does most of
58 * the PA handling, and have the JACK RT thread request data from it
59 * via pa_asyncmsgq. The cost is an additional context switch which
60 * should hopefully not be that expensive if RT scheduling is
61 * enabled. A better fix would only be possible with additional event
62 * source support in JACK.
65 PA_MODULE_AUTHOR("Lennart Poettering");
66 PA_MODULE_DESCRIPTION("JACK Sink");
67 PA_MODULE_LOAD_ONCE(TRUE);
68 PA_MODULE_VERSION(PACKAGE_VERSION);
70 "sink_name=<name of sink> "
71 "server_name=<jack server name> "
72 "client_name=<jack client name> "
73 "channels=<number of channels> "
74 "connect=<connect ports?> "
75 "channel_map=<channel map>");
77 #define DEFAULT_SINK_NAME "jack_out"
86 jack_port_t* port[PA_CHANNELS_MAX];
87 jack_client_t *client;
89 void *buffer[PA_CHANNELS_MAX];
91 pa_thread_mq thread_mq;
92 pa_asyncmsgq *jack_msgq;
94 pa_rtpoll_item *rtpoll_item;
98 jack_nframes_t frames_in_buffer;
99 jack_nframes_t saved_frame_time;
100 pa_bool_t saved_frame_time_valid;
103 static const char* const valid_modargs[] = {
114 SINK_MESSAGE_RENDER = PA_SINK_MESSAGE_MAX,
115 SINK_MESSAGE_BUFFER_SIZE,
116 SINK_MESSAGE_ON_SHUTDOWN
119 static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *memchunk) {
120 struct userdata *u = PA_SINK(o)->userdata;
124 case SINK_MESSAGE_RENDER:
126 /* Handle the request from the JACK thread */
128 if (u->sink->thread_info.state == PA_SINK_RUNNING) {
133 pa_assert(offset > 0);
134 nbytes = (size_t) offset * pa_frame_size(&u->sink->sample_spec);
136 pa_sink_render_full(u->sink, nbytes, &chunk);
138 p = (uint8_t*) pa_memblock_acquire(chunk.memblock) + chunk.index;
139 pa_deinterleave(p, u->buffer, u->channels, sizeof(float), (unsigned) offset);
140 pa_memblock_release(chunk.memblock);
142 pa_memblock_unref(chunk.memblock);
147 /* Humm, we're not RUNNING, hence let's write some silence */
149 ss = u->sink->sample_spec;
152 for (c = 0; c < u->channels; c++)
153 pa_silence_memory(u->buffer[c], (size_t) offset * pa_sample_size(&ss), &ss);
156 u->frames_in_buffer = (jack_nframes_t) offset;
157 u->saved_frame_time = * (jack_nframes_t*) data;
158 u->saved_frame_time_valid = TRUE;
162 case SINK_MESSAGE_BUFFER_SIZE:
163 pa_sink_set_max_request_within_thread(u->sink, (size_t) offset * pa_frame_size(&u->sink->sample_spec));
166 case SINK_MESSAGE_ON_SHUTDOWN:
167 pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL);
170 case PA_SINK_MESSAGE_GET_LATENCY: {
171 jack_nframes_t l, ft, d;
174 /* This is the "worst-case" latency */
175 l = jack_port_get_total_latency(u->client, u->port[0]) + u->frames_in_buffer;
177 if (u->saved_frame_time_valid) {
178 /* Adjust the worst case latency by the time that
179 * passed since we last handed data to JACK */
181 ft = jack_frame_time(u->client);
182 d = ft > u->saved_frame_time ? ft - u->saved_frame_time : 0;
183 l = l > d ? l - d : 0;
186 /* Convert it to usec */
187 n = l * pa_frame_size(&u->sink->sample_spec);
188 *((pa_usec_t*) data) = pa_bytes_to_usec(n, &u->sink->sample_spec);
195 return pa_sink_process_msg(o, code, data, offset, memchunk);
198 static int jack_process(jack_nframes_t nframes, void *arg) {
199 struct userdata *u = arg;
201 jack_nframes_t frame_time;
204 /* We just forward the request to our other RT thread */
206 for (c = 0; c < u->channels; c++)
207 pa_assert_se(u->buffer[c] = jack_port_get_buffer(u->port[c], nframes));
209 frame_time = jack_frame_time(u->client);
211 pa_assert_se(pa_asyncmsgq_send(u->jack_msgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_RENDER, &frame_time, nframes, NULL) == 0);
215 static void thread_func(void *userdata) {
216 struct userdata *u = userdata;
220 pa_log_debug("Thread starting up");
222 if (u->core->realtime_scheduling)
223 pa_make_realtime(u->core->realtime_priority);
225 pa_thread_mq_install(&u->thread_mq);
226 pa_rtpoll_install(u->rtpoll);
231 if (PA_SINK_IS_OPENED(u->sink->thread_info.state))
232 if (u->sink->thread_info.rewind_requested)
233 pa_sink_process_rewind(u->sink, 0);
235 if ((ret = pa_rtpoll_run(u->rtpoll, TRUE)) < 0)
243 /* If this was no regular exit from the loop we have to continue
244 * processing messages until we received PA_MESSAGE_SHUTDOWN */
245 pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL);
246 pa_asyncmsgq_wait_for(u->thread_mq.inq, PA_MESSAGE_SHUTDOWN);
249 pa_log_debug("Thread shutting down");
252 static void jack_error_func(const char*t) {
255 s = pa_xstrndup(t, strcspn(t, "\n\r"));
256 pa_log_warn("JACK error >%s<", s);
260 static void jack_init(void *arg) {
261 struct userdata *u = arg;
263 pa_log_info("JACK thread starting up.");
265 if (u->core->realtime_scheduling)
266 pa_make_realtime(u->core->realtime_priority+4);
269 static void jack_shutdown(void* arg) {
270 struct userdata *u = arg;
272 pa_log_info("JACK thread shutting down.");
273 pa_asyncmsgq_post(u->jack_msgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_ON_SHUTDOWN, NULL, 0, NULL, NULL);
276 static int jack_buffer_size(jack_nframes_t nframes, void *arg) {
277 struct userdata *u = arg;
279 pa_log_info("JACK buffer size changed.");
280 pa_asyncmsgq_post(u->jack_msgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_BUFFER_SIZE, NULL, nframes, NULL, NULL);
284 int pa__init(pa_module*m) {
285 struct userdata *u = NULL;
288 pa_modargs *ma = NULL;
289 jack_status_t status;
290 const char *server_name, *client_name;
291 uint32_t channels = 0;
292 pa_bool_t do_connect = TRUE;
294 const char **ports = NULL, **p;
295 pa_sink_new_data data;
299 jack_set_error_function(jack_error_func);
301 if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
302 pa_log("Failed to parse module arguments.");
306 if (pa_modargs_get_value_boolean(ma, "connect", &do_connect) < 0) {
307 pa_log("Failed to parse connect= argument.");
311 server_name = pa_modargs_get_value(ma, "server_name", NULL);
312 client_name = pa_modargs_get_value(ma, "client_name", "PulseAudio JACK Sink");
314 m->userdata = u = pa_xnew0(struct userdata, 1);
317 u->saved_frame_time_valid = FALSE;
318 u->rtpoll = pa_rtpoll_new();
319 pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
321 /* The queue linking the JACK thread and our RT thread */
322 u->jack_msgq = pa_asyncmsgq_new(0);
324 /* The msgq from the JACK RT thread should have an even higher
325 * priority than the normal message queues, to match the guarantee
326 * all other drivers make: supplying the audio device with data is
327 * the top priority -- and as long as that is possible we don't do
329 u->rtpoll_item = pa_rtpoll_item_new_asyncmsgq_read(u->rtpoll, PA_RTPOLL_EARLY-1, u->jack_msgq);
331 if (!(u->client = jack_client_open(client_name, server_name ? JackServerName : JackNullOption, &status, server_name))) {
332 pa_log("jack_client_open() failed.");
336 ports = jack_get_ports(u->client, NULL, NULL, JackPortIsPhysical|JackPortIsInput);
339 for (p = ports; *p; p++)
343 channels = m->core->default_sample_spec.channels;
345 if (pa_modargs_get_value_u32(ma, "channels", &channels) < 0 ||
347 channels > PA_CHANNELS_MAX) {
348 pa_log("Failed to parse channels= argument.");
352 if (channels == m->core->default_channel_map.channels)
353 map = m->core->default_channel_map;
355 pa_channel_map_init_extend(&map, channels, PA_CHANNEL_MAP_ALSA);
357 if (pa_modargs_get_channel_map(ma, NULL, &map) < 0 || map.channels != channels) {
358 pa_log("Failed to parse channel_map= argument.");
362 pa_log_info("Successfully connected as '%s'", jack_get_client_name(u->client));
364 u->channels = ss.channels = (uint8_t) channels;
365 ss.rate = jack_get_sample_rate(u->client);
366 ss.format = PA_SAMPLE_FLOAT32NE;
368 pa_assert(pa_sample_spec_valid(&ss));
370 for (i = 0; i < ss.channels; i++) {
371 if (!(u->port[i] = jack_port_register(u->client, pa_channel_position_to_string(map.map[i]), JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput|JackPortIsTerminal, 0))) {
372 pa_log("jack_port_register() failed.");
377 pa_sink_new_data_init(&data);
378 data.driver = __FILE__;
380 pa_sink_new_data_set_name(&data, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME));
381 pa_sink_new_data_set_sample_spec(&data, &ss);
382 pa_sink_new_data_set_channel_map(&data, &map);
383 pa_proplist_sets(data.proplist, PA_PROP_DEVICE_API, "jack");
385 pa_proplist_sets(data.proplist, PA_PROP_DEVICE_STRING, server_name);
386 pa_proplist_setf(data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Jack sink (%s)", jack_get_client_name(u->client));
387 pa_proplist_sets(data.proplist, "jack.client_name", jack_get_client_name(u->client));
389 u->sink = pa_sink_new(m->core, &data, PA_SINK_LATENCY);
390 pa_sink_new_data_done(&data);
393 pa_log("Failed to create sink.");
397 u->sink->parent.process_msg = sink_process_msg;
398 u->sink->userdata = u;
400 pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
401 pa_sink_set_rtpoll(u->sink, u->rtpoll);
402 pa_sink_set_max_request(u->sink, jack_get_buffer_size(u->client) * pa_frame_size(&u->sink->sample_spec));
404 jack_set_process_callback(u->client, jack_process, u);
405 jack_on_shutdown(u->client, jack_shutdown, u);
406 jack_set_thread_init_callback(u->client, jack_init, u);
407 jack_set_buffer_size_callback(u->client, jack_buffer_size, u);
409 if (!(u->thread = pa_thread_new(thread_func, u))) {
410 pa_log("Failed to create thread.");
414 if (jack_activate(u->client)) {
415 pa_log("jack_activate() failed");
420 for (i = 0, p = ports; i < ss.channels; i++, p++) {
423 pa_log("Not enough physical output ports, leaving unconnected.");
427 pa_log_info("Connecting %s to %s", jack_port_name(u->port[i]), *p);
429 if (jack_connect(u->client, jack_port_name(u->port[i]), *p)) {
430 pa_log("Failed to connect %s to %s, leaving unconnected.", jack_port_name(u->port[i]), *p);
436 pa_sink_put(u->sink);
454 int pa__get_n_used(pa_module *m) {
458 pa_assert_se(u = m->userdata);
460 return pa_sink_linked_by(u->sink);
463 void pa__done(pa_module*m) {
468 if (!(u = m->userdata))
472 jack_client_close(u->client);
475 pa_sink_unlink(u->sink);
478 pa_asyncmsgq_send(u->thread_mq.inq, NULL, PA_MESSAGE_SHUTDOWN, NULL, 0, NULL);
479 pa_thread_free(u->thread);
482 pa_thread_mq_done(&u->thread_mq);
485 pa_sink_unref(u->sink);
488 pa_rtpoll_item_free(u->rtpoll_item);
491 pa_asyncmsgq_unref(u->jack_msgq);
494 pa_rtpoll_free(u->rtpoll);