code.delx.au - pulseaudio/blob - src/modules/module-jack-source.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2006 Lennart Poettering
   5
   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 of the License,
   9   or (at your option) any later version.
  10
  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.
  15
  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
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdlib.h>
  27 #include <sys/stat.h>
  28 #include <stdio.h>
  29 #include <errno.h>
  30 #include <string.h>
  31 #include <fcntl.h>
  32 #include <unistd.h>
  33 #include <limits.h>
  34
  35 #include <jack/jack.h>
  36
  37 #include <pulse/xmalloc.h>
  38
  39 #include <pulsecore/core-error.h>
  40 #include <pulsecore/source.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>
  49
  50 #include "module-jack-source-symdef.h"
  51
  52 /* See module-jack-sink for a few comments how this module basically
  53  * works */
  54
  55 PA_MODULE_AUTHOR("Lennart Poettering");
  56 PA_MODULE_DESCRIPTION("JACK Source");
  57 PA_MODULE_VERSION(PACKAGE_VERSION);
  58 PA_MODULE_LOAD_ONCE(TRUE);
  59 PA_MODULE_USAGE(
  60         "source_name=<name of source> "
  61         "server_name=<jack server name> "
  62         "client_name=<jack client name> "
  63         "channels=<number of channels> "
  64         "connect=<connect ports?>"
  65         "channel_map=<channel map>");
  66
  67 #define DEFAULT_SOURCE_NAME "jack_in"
  68
  69 struct userdata {
  70     pa_core *core;
  71     pa_module *module;
  72     pa_source *source;
  73
  74     unsigned channels;
  75
  76     jack_port_t* port[PA_CHANNELS_MAX];
  77     jack_client_t *client;
  78
  79     pa_thread_mq thread_mq;
  80     pa_asyncmsgq *jack_msgq;
  81     pa_rtpoll *rtpoll;
  82     pa_rtpoll_item *rtpoll_item;
  83
  84     pa_thread *thread;
  85
  86     jack_nframes_t saved_frame_time;
  87     pa_bool_t saved_frame_time_valid;
  88 };
  89
  90 static const char* const valid_modargs[] = {
  91     "source_name",
  92     "server_name",
  93     "client_name",
  94     "channels",
  95     "connect",
  96     "channel_map",
  97     NULL
  98 };
  99
 100 enum {
 101     SOURCE_MESSAGE_POST = PA_SOURCE_MESSAGE_MAX,
 102     SOURCE_MESSAGE_ON_SHUTDOWN
 103 };
 104
 105 static int source_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
 106     struct userdata *u = PA_SOURCE(o)->userdata;
 107
 108     switch (code) {
 109
 110         case SOURCE_MESSAGE_POST:
 111
 112             /* Handle the new block from the JACK thread */
 113             pa_assert(chunk);
 114             pa_assert(chunk->length > 0);
 115
 116             if (u->source->thread_info.state == PA_SOURCE_RUNNING)
 117                 pa_source_post(u->source, chunk);
 118
 119             u->saved_frame_time = (jack_nframes_t) offset;
 120             u->saved_frame_time_valid = TRUE;
 121
 122             return 0;
 123
 124         case SOURCE_MESSAGE_ON_SHUTDOWN:
 125             pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL);
 126             return 0;
 127
 128         case PA_SOURCE_MESSAGE_GET_LATENCY: {
 129             jack_nframes_t l, ft, d;
 130             size_t n;
 131
 132             /* This is the "worst-case" latency */
 133             l = jack_port_get_total_latency(u->client, u->port[0]);
 134
 135             if (u->saved_frame_time_valid) {
 136                 /* Adjust the worst case latency by the time that
 137                  * passed since we last handed data to JACK */
 138
 139                 ft = jack_frame_time(u->client);
 140                 d = ft > u->saved_frame_time ? ft - u->saved_frame_time : 0;
 141                 l += d;
 142             }
 143
 144             /* Convert it to usec */
 145             n = l * pa_frame_size(&u->source->sample_spec);
 146             *((pa_usec_t*) data) = pa_bytes_to_usec(n, &u->source->sample_spec);
 147
 148             return 0;
 149         }
 150     }
 151
 152     return pa_source_process_msg(o, code, data, offset, chunk);
 153 }
 154
 155 static int jack_process(jack_nframes_t nframes, void *arg) {
 156     unsigned c;
 157     struct userdata *u = arg;
 158     const void *buffer[PA_CHANNELS_MAX];
 159     void *p;
 160     jack_nframes_t frame_time;
 161     pa_memchunk chunk;
 162
 163     pa_assert(u);
 164
 165     for (c = 0; c < u->channels; c++)
 166         pa_assert(buffer[c] = jack_port_get_buffer(u->port[c], nframes));
 167
 168     /* We interleave the data and pass it on to the other RT thread */
 169
 170     pa_memchunk_reset(&chunk);
 171     chunk.length = nframes * pa_frame_size(&u->source->sample_spec);
 172     chunk.memblock = pa_memblock_new(u->core->mempool, chunk.length);
 173     p = pa_memblock_acquire(chunk.memblock);
 174     pa_interleave(buffer, u->channels, p, sizeof(float), nframes);
 175     pa_memblock_release(chunk.memblock);
 176
 177     frame_time = jack_frame_time(u->client);
 178
 179     pa_asyncmsgq_post(u->jack_msgq, PA_MSGOBJECT(u->source), SOURCE_MESSAGE_POST, NULL, frame_time, &chunk, NULL);
 180
 181     pa_memblock_unref(chunk.memblock);
 182
 183     return 0;
 184 }
 185
 186 static void thread_func(void *userdata) {
 187     struct userdata *u = userdata;
 188
 189     pa_assert(u);
 190
 191     pa_log_debug("Thread starting up");
 192
 193     if (u->core->realtime_scheduling)
 194         pa_make_realtime(u->core->realtime_priority);
 195
 196     pa_thread_mq_install(&u->thread_mq);
 197     pa_rtpoll_install(u->rtpoll);
 198
 199     for (;;) {
 200         int ret;
 201
 202         if ((ret = pa_rtpoll_run(u->rtpoll, TRUE)) < 0)
 203             goto fail;
 204
 205         if (ret == 0)
 206             goto finish;
 207     }
 208
 209 fail:
 210     /* If this was no regular exit from the loop we have to continue
 211      * processing messages until we received PA_MESSAGE_SHUTDOWN */
 212     pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL);
 213     pa_asyncmsgq_wait_for(u->thread_mq.inq, PA_MESSAGE_SHUTDOWN);
 214
 215 finish:
 216     pa_log_debug("Thread shutting down");
 217 }
 218
 219 static void jack_error_func(const char*t) {
 220     char *s;
 221
 222     s = pa_xstrndup(t, strcspn(t, "\n\r"));
 223     pa_log_warn("JACK error >%s<", s);
 224     pa_xfree(s);
 225 }
 226
 227 static void jack_init(void *arg) {
 228     struct userdata *u = arg;
 229
 230     pa_log_info("JACK thread starting up.");
 231
 232     if (u->core->realtime_scheduling)
 233         pa_make_realtime(u->core->realtime_priority+4);
 234 }
 235
 236 static void jack_shutdown(void* arg) {
 237     struct userdata *u = arg;
 238
 239     pa_log_info("JACK thread shutting down..");
 240     pa_asyncmsgq_post(u->jack_msgq, PA_MSGOBJECT(u->source), SOURCE_MESSAGE_ON_SHUTDOWN, NULL, 0, NULL, NULL);
 241 }
 242
 243 int pa__init(pa_module*m) {
 244     struct userdata *u = NULL;
 245     pa_sample_spec ss;
 246     pa_channel_map map;
 247     pa_modargs *ma = NULL;
 248     jack_status_t status;
 249     const char *server_name, *client_name;
 250     uint32_t channels = 0;
 251     pa_bool_t do_connect = TRUE;
 252     unsigned i;
 253     const char **ports = NULL, **p;
 254     pa_source_new_data data;
 255
 256     pa_assert(m);
 257
 258     jack_set_error_function(jack_error_func);
 259
 260     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 261         pa_log("Failed to parse module arguments.");
 262         goto fail;
 263     }
 264
 265     if (pa_modargs_get_value_boolean(ma, "connect", &do_connect) < 0) {
 266         pa_log("Failed to parse connect= argument.");
 267         goto fail;
 268     }
 269
 270     server_name = pa_modargs_get_value(ma, "server_name", NULL);
 271     client_name = pa_modargs_get_value(ma, "client_name", "PulseAudio JACK Source");
 272
 273     u = pa_xnew0(struct userdata, 1);
 274     u->core = m->core;
 275     u->module = m;
 276     m->userdata = u;
 277     u->saved_frame_time_valid = FALSE;
 278
 279     u->rtpoll = pa_rtpoll_new();
 280     pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
 281
 282     u->jack_msgq = pa_asyncmsgq_new(0);
 283     u->rtpoll_item = pa_rtpoll_item_new_asyncmsgq_read(u->rtpoll, PA_RTPOLL_EARLY-1, u->jack_msgq);
 284
 285     if (!(u->client = jack_client_open(client_name, server_name ? JackServerName : JackNullOption, &status, server_name))) {
 286         pa_log("jack_client_open() failed.");
 287         goto fail;
 288     }
 289
 290     ports = jack_get_ports(u->client, NULL, NULL, JackPortIsPhysical|JackPortIsOutput);
 291
 292     channels = 0;
 293     for (p = ports; *p; p++)
 294         channels++;
 295
 296     if (!channels)
 297         channels = m->core->default_sample_spec.channels;
 298
 299     if (pa_modargs_get_value_u32(ma, "channels", &channels) < 0 ||
 300         channels <= 0 ||
 301         channels >= PA_CHANNELS_MAX) {
 302         pa_log("failed to parse channels= argument.");
 303         goto fail;
 304     }
 305
 306     if (channels == m->core->default_channel_map.channels)
 307         map = m->core->default_channel_map;
 308     else
 309         pa_channel_map_init_extend(&map, channels, PA_CHANNEL_MAP_ALSA);
 310
 311     if (pa_modargs_get_channel_map(ma, NULL, &map) < 0 || map.channels != channels) {
 312         pa_log("failed to parse channel_map= argument.");
 313         goto fail;
 314     }
 315
 316     pa_log_info("Successfully connected as '%s'", jack_get_client_name(u->client));
 317
 318     u->channels = ss.channels = (uint8_t) channels;
 319     ss.rate = jack_get_sample_rate(u->client);
 320     ss.format = PA_SAMPLE_FLOAT32NE;
 321
 322     pa_assert(pa_sample_spec_valid(&ss));
 323
 324     for (i = 0; i < ss.channels; i++) {
 325         if (!(u->port[i] = jack_port_register(u->client, pa_channel_position_to_string(map.map[i]), JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput|JackPortIsTerminal, 0))) {
 326             pa_log("jack_port_register() failed.");
 327             goto fail;
 328         }
 329     }
 330
 331     pa_source_new_data_init(&data);
 332     data.driver = __FILE__;
 333     data.module = m;
 334     pa_source_new_data_set_name(&data, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME));
 335     pa_source_new_data_set_sample_spec(&data, &ss);
 336     pa_source_new_data_set_channel_map(&data, &map);
 337     pa_proplist_sets(data.proplist, PA_PROP_DEVICE_API, "jack");
 338     if (server_name)
 339         pa_proplist_sets(data.proplist, PA_PROP_DEVICE_STRING, server_name);
 340     pa_proplist_setf(data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Jack source (%s)", jack_get_client_name(u->client));
 341     pa_proplist_sets(data.proplist, "jack.client_name", jack_get_client_name(u->client));
 342
 343     u->source = pa_source_new(m->core, &data, PA_SOURCE_LATENCY);
 344     pa_source_new_data_done(&data);
 345
 346     if (!u->source) {
 347         pa_log("Failed to create source.");
 348         goto fail;
 349     }
 350
 351     u->source->parent.process_msg = source_process_msg;
 352     u->source->userdata = u;
 353
 354     pa_source_set_asyncmsgq(u->source, u->thread_mq.inq);
 355     pa_source_set_rtpoll(u->source, u->rtpoll);
 356
 357     jack_set_process_callback(u->client, jack_process, u);
 358     jack_on_shutdown(u->client, jack_shutdown, u);
 359     jack_set_thread_init_callback(u->client, jack_init, u);
 360
 361     if (!(u->thread = pa_thread_new(thread_func, u))) {
 362         pa_log("Failed to create thread.");
 363         goto fail;
 364     }
 365
 366     if (jack_activate(u->client)) {
 367         pa_log("jack_activate() failed");
 368         goto fail;
 369     }
 370
 371     if (do_connect) {
 372         for (i = 0, p = ports; i < ss.channels; i++, p++) {
 373
 374             if (!*p) {
 375                 pa_log("not enough physical output ports, leaving unconnected.");
 376                 break;
 377             }
 378
 379             pa_log_info("connecting %s to %s", jack_port_name(u->port[i]), *p);
 380
 381             if (jack_connect(u->client, *p, jack_port_name(u->port[i]))) {
 382                 pa_log("failed to connect %s to %s, leaving unconnected.", jack_port_name(u->port[i]), *p);
 383                 break;
 384             }
 385         }
 386
 387     }
 388
 389     pa_source_put(u->source);
 390
 391     free(ports);
 392     pa_modargs_free(ma);
 393
 394     return 0;
 395
 396 fail:
 397     if (ma)
 398         pa_modargs_free(ma);
 399
 400     free(ports);
 401
 402     pa__done(m);
 403
 404     return -1;
 405 }
 406
 407 int pa__get_n_used(pa_module *m) {
 408     struct userdata *u;
 409
 410     pa_assert(m);
 411     pa_assert_se(u = m->userdata);
 412
 413     return pa_source_linked_by(u->source);
 414 }
 415
 416 void pa__done(pa_module*m) {
 417     struct userdata *u;
 418     pa_assert(m);
 419
 420     if (!(u = m->userdata))
 421         return;
 422
 423     if (u->client)
 424         jack_client_close(u->client);
 425
 426     if (u->source)
 427         pa_source_unlink(u->source);
 428
 429     if (u->thread) {
 430         pa_asyncmsgq_send(u->thread_mq.inq, NULL, PA_MESSAGE_SHUTDOWN, NULL, 0, NULL);
 431         pa_thread_free(u->thread);
 432     }
 433
 434     pa_thread_mq_done(&u->thread_mq);
 435
 436     if (u->source)
 437         pa_source_unref(u->source);
 438
 439     if (u->rtpoll_item)
 440         pa_rtpoll_item_free(u->rtpoll_item);
 441
 442     if (u->jack_msgq)
 443         pa_asyncmsgq_unref(u->jack_msgq);
 444
 445     if (u->rtpoll)
 446         pa_rtpoll_free(u->rtpoll);
 447
 448     pa_xfree(u);
 449 }