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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio 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   polypaudio 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 polypaudio; 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 <assert.h>
  30 #include <errno.h>
  31 #include <string.h>
  32 #include <fcntl.h>
  33 #include <unistd.h>
  34 #include <limits.h>
  35 #include <pthread.h>
  36
  37 #include <jack/jack.h>
  38
  39 #include <polypcore/iochannel.h>
  40 #include <polypcore/source.h>
  41 #include <polypcore/module.h>
  42 #include <polypcore/util.h>
  43 #include <polypcore/modargs.h>
  44 #include <polypcore/xmalloc.h>
  45 #include <polypcore/log.h>
  46 #include <polyp/mainloop-api.h>
  47
  48 #include "module-jack-source-symdef.h"
  49
  50 PA_MODULE_AUTHOR("Lennart Poettering")
  51 PA_MODULE_DESCRIPTION("Jack Source")
  52 PA_MODULE_VERSION(PACKAGE_VERSION)
  53 PA_MODULE_USAGE(
  54         "source_name=<name of source> "
  55         "server_name=<jack server name> "
  56         "client_name=<jack client name> "
  57         "channels=<number of channels> "
  58         "connect=<connect ports?>"
  59         "channel_map=<channel map>")
  60
  61 #define DEFAULT_SOURCE_NAME "jack_in"
  62
  63 struct userdata {
  64     pa_core *core;
  65     pa_module *module;
  66
  67     pa_source *source;
  68
  69     unsigned channels;
  70
  71     jack_port_t* port[PA_CHANNELS_MAX];
  72     jack_client_t *client;
  73
  74     pthread_mutex_t mutex;
  75     pthread_cond_t cond;
  76
  77     void * buffer[PA_CHANNELS_MAX];
  78     jack_nframes_t frames_posted;
  79     int quit_requested;
  80
  81     int pipe_fds[2];
  82     pa_io_event *io_event;
  83
  84     jack_nframes_t frames_in_buffer;
  85     jack_nframes_t timestamp;
  86 };
  87
  88 static const char* const valid_modargs[] = {
  89     "source_name",
  90     "server_name",
  91     "client_name",
  92     "channels",
  93     "connect",
  94     "channel_map",
  95     NULL
  96 };
  97
  98 static void stop_source(struct userdata *u) {
  99     assert (u);
 100
 101     jack_client_close(u->client);
 102     u->client = NULL;
 103     u->core->mainloop->io_free(u->io_event);
 104     u->io_event = NULL;
 105     pa_source_disconnect(u->source);
 106     pa_source_unref(u->source);
 107     u->source = NULL;
 108     pa_module_unload_request(u->module);
 109 }
 110
 111 static void io_event_cb(pa_mainloop_api *m, pa_io_event *e, int fd, pa_io_event_flags_t flags, void *userdata) {
 112     struct userdata *u = userdata;
 113     char x;
 114
 115     assert(m);
 116     assert(flags == PA_IO_EVENT_INPUT);
 117     assert(u);
 118     assert(u->pipe_fds[0] == fd);
 119
 120     read(fd, &x, 1);
 121
 122     if (u->quit_requested) {
 123         stop_source(u);
 124         u->quit_requested = 0;
 125         return;
 126     }
 127
 128     pthread_mutex_lock(&u->mutex);
 129
 130     if (u->frames_posted > 0) {
 131         unsigned fs;
 132         jack_nframes_t frame_idx;
 133         pa_memchunk chunk;
 134
 135         fs = pa_frame_size(&u->source->sample_spec);
 136
 137         chunk.memblock = pa_memblock_new(chunk.length = u->frames_posted * fs, u->core->memblock_stat);
 138         chunk.index = 0;
 139
 140         for (frame_idx = 0; frame_idx < u->frames_posted; frame_idx ++) {
 141             unsigned c;
 142
 143             for (c = 0; c < u->channels; c++) {
 144                 float *s = ((float*) u->buffer[c]) + frame_idx;
 145                 float *d = ((float*) ((uint8_t*) chunk.memblock->data + chunk.index)) + (frame_idx * u->channels) + c;
 146
 147                 *d = *s;
 148             }
 149         }
 150
 151         pa_source_post(u->source, &chunk);
 152         pa_memblock_unref(chunk.memblock);
 153
 154         u->frames_posted = 0;
 155
 156         pthread_cond_signal(&u->cond);
 157     }
 158
 159     pthread_mutex_unlock(&u->mutex);
 160 }
 161
 162 static void request_post(struct userdata *u) {
 163     char c = 'x';
 164     assert(u);
 165
 166     assert(u->pipe_fds[1] >= 0);
 167     write(u->pipe_fds[1], &c, 1);
 168 }
 169
 170 static void jack_shutdown(void *arg) {
 171     struct userdata *u = arg;
 172     assert(u);
 173
 174     u->quit_requested = 1;
 175     request_post(u);
 176 }
 177
 178 static int jack_process(jack_nframes_t nframes, void *arg) {
 179     struct userdata *u = arg;
 180     assert(u);
 181
 182     if (jack_transport_query(u->client, NULL) == JackTransportRolling) {
 183         unsigned c;
 184
 185         pthread_mutex_lock(&u->mutex);
 186
 187         u->frames_posted = nframes;
 188
 189         for (c = 0; c < u->channels; c++) {
 190             u->buffer[c] = jack_port_get_buffer(u->port[c], nframes);
 191             assert(u->buffer[c]);
 192         }
 193
 194         request_post(u);
 195
 196         pthread_cond_wait(&u->cond, &u->mutex);
 197
 198         u->frames_in_buffer = nframes;
 199         u->timestamp = jack_get_current_transport_frame(u->client);
 200
 201         pthread_mutex_unlock(&u->mutex);
 202     }
 203
 204     return 0;
 205 }
 206
 207 static pa_usec_t source_get_latency_cb(pa_source *s) {
 208     struct userdata *u;
 209     jack_nframes_t n, l, d;
 210
 211     assert(s);
 212     u = s->userdata;
 213
 214     if (jack_transport_query(u->client, NULL) != JackTransportRolling)
 215         return 0;
 216
 217     n = jack_get_current_transport_frame(u->client);
 218
 219     if (n < u->timestamp)
 220         return 0;
 221
 222     d = n - u->timestamp;
 223     l = jack_port_get_total_latency(u->client, u->port[0]);
 224
 225     return pa_bytes_to_usec((l + d) * pa_frame_size(&s->sample_spec), &s->sample_spec);
 226 }
 227
 228 static void jack_error_func(const char*t) {
 229     pa_log_warn(__FILE__": JACK error >%s<", t);
 230 }
 231
 232 int pa__init(pa_core *c, pa_module*m) {
 233     struct userdata *u = NULL;
 234     pa_sample_spec ss;
 235     pa_channel_map map;
 236     pa_modargs *ma = NULL;
 237     jack_status_t status;
 238     const char *server_name, *client_name;
 239     uint32_t channels = 0;
 240     int connect = 1;
 241     unsigned i;
 242     const char **ports = NULL, **p;
 243
 244     assert(c);
 245     assert(m);
 246
 247     jack_set_error_function(jack_error_func);
 248
 249     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 250         pa_log(__FILE__": failed to parse module arguments.");
 251         goto fail;
 252     }
 253
 254     if (pa_modargs_get_value_boolean(ma, "connect", &connect) < 0) {
 255         pa_log(__FILE__": failed to parse connect= argument.");
 256         goto fail;
 257     }
 258
 259     server_name = pa_modargs_get_value(ma, "server_name", NULL);
 260     client_name = pa_modargs_get_value(ma, "client_name", "polypaudio");
 261
 262     u = pa_xnew0(struct userdata, 1);
 263     m->userdata = u;
 264     u->core = c;
 265     u->module = m;
 266     u->pipe_fds[0] = u->pipe_fds[1] = -1;
 267
 268     pthread_mutex_init(&u->mutex, NULL);
 269     pthread_cond_init(&u->cond, NULL);
 270
 271     if (pipe(u->pipe_fds) < 0) {
 272         pa_log(__FILE__": pipe() failed: %s", strerror(errno));
 273         goto fail;
 274     }
 275
 276     pa_make_nonblock_fd(u->pipe_fds[1]);
 277
 278     if (!(u->client = jack_client_open(client_name, server_name ? JackServerName : JackNullOption, &status, server_name))) {
 279         pa_log(__FILE__": jack_client_open() failed.");
 280         goto fail;
 281     }
 282
 283     ports = jack_get_ports(u->client, NULL, NULL, JackPortIsPhysical|JackPortIsOutput);
 284
 285     channels = 0;
 286     for (p = ports; *p; p++)
 287         channels++;
 288
 289     if (!channels)
 290         channels = c->default_sample_spec.channels;
 291
 292     if (pa_modargs_get_value_u32(ma, "channels", &channels) < 0 || channels <= 0 || channels >= PA_CHANNELS_MAX) {
 293         pa_log(__FILE__": failed to parse channels= argument.");
 294         goto fail;
 295     }
 296
 297     pa_channel_map_init_auto(&map, channels);
 298     if (pa_modargs_get_channel_map(ma, &map) < 0 || map.channels != channels) {
 299         pa_log(__FILE__": failed to parse channel_map= argument.");
 300         goto fail;
 301     }
 302
 303     pa_log_info(__FILE__": Successfully connected as '%s'", jack_get_client_name(u->client));
 304
 305     ss.channels = u->channels = channels;
 306     ss.rate = jack_get_sample_rate(u->client);
 307     ss.format = PA_SAMPLE_FLOAT32NE;
 308
 309     assert(pa_sample_spec_valid(&ss));
 310
 311     for (i = 0; i < ss.channels; i++) {
 312         if (!(u->port[i] = jack_port_register(u->client, pa_channel_position_to_string(map.map[i]), JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput|JackPortIsTerminal, 0))) {
 313             pa_log(__FILE__": jack_port_register() failed.");
 314             goto fail;
 315         }
 316     }
 317
 318     if (!(u->source = pa_source_new(c, __FILE__, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss, &map))) {
 319         pa_log(__FILE__": failed to create source.");
 320         goto fail;
 321     }
 322
 323     u->source->userdata = u;
 324     pa_source_set_owner(u->source, m);
 325     u->source->description = pa_sprintf_malloc("Jack source (%s)", jack_get_client_name(u->client));
 326     u->source->get_latency = source_get_latency_cb;
 327
 328     jack_set_process_callback(u->client, jack_process, u);
 329     jack_on_shutdown(u->client, jack_shutdown, u);
 330
 331     if (jack_activate(u->client)) {
 332         pa_log(__FILE__": jack_activate() failed");
 333         goto fail;
 334     }
 335
 336     if (connect) {
 337         for (i = 0, p = ports; i < ss.channels; i++, p++) {
 338
 339             if (!*p) {
 340                 pa_log(__FILE__": not enough physical output ports, leaving unconnected.");
 341                 break;
 342             }
 343
 344             pa_log_info(__FILE__": connecting %s to %s", jack_port_name(u->port[i]), *p);
 345
 346             if (jack_connect(u->client, *p, jack_port_name(u->port[i]))) {
 347                 pa_log(__FILE__": failed to connect %s to %s, leaving unconnected.", jack_port_name(u->port[i]), *p);
 348                 break;
 349             }
 350         }
 351
 352     }
 353
 354     u->io_event = c->mainloop->io_new(c->mainloop, u->pipe_fds[0], PA_IO_EVENT_INPUT, io_event_cb, u);
 355
 356     free(ports);
 357     pa_modargs_free(ma);
 358
 359     return 0;
 360
 361 fail:
 362     if (ma)
 363         pa_modargs_free(ma);
 364
 365     free(ports);
 366
 367     pa__done(c, m);
 368
 369     return -1;
 370 }
 371
 372 void pa__done(pa_core *c, pa_module*m) {
 373     struct userdata *u;
 374     assert(c && m);
 375
 376     if (!(u = m->userdata))
 377         return;
 378
 379     if (u->client)
 380         jack_client_close(u->client);
 381
 382     if (u->io_event)
 383         c->mainloop->io_free(u->io_event);
 384
 385     if (u->source) {
 386         pa_source_disconnect(u->source);
 387         pa_source_unref(u->source);
 388     }
 389
 390     if (u->pipe_fds[0] >= 0)
 391         close(u->pipe_fds[0]);
 392     if (u->pipe_fds[1] >= 0)
 393         close(u->pipe_fds[1]);
 394
 395     pthread_mutex_destroy(&u->mutex);
 396     pthread_cond_destroy(&u->cond);
 397     pa_xfree(u);
 398 }