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 <polyp/xmalloc.h>
  40
  41 #include <polypcore/iochannel.h>
  42 #include <polypcore/source.h>
  43 #include <polypcore/module.h>
  44 #include <polypcore/util.h>
  45 #include <polypcore/modargs.h>
  46 #include <polypcore/log.h>
  47 #include <polyp/mainloop-api.h>
  48
  49 #include "module-jack-source-symdef.h"
  50
  51 PA_MODULE_AUTHOR("Lennart Poettering")
  52 PA_MODULE_DESCRIPTION("Jack Source")
  53 PA_MODULE_VERSION(PACKAGE_VERSION)
  54 PA_MODULE_USAGE(
  55         "source_name=<name of source> "
  56         "server_name=<jack server name> "
  57         "client_name=<jack client name> "
  58         "channels=<number of channels> "
  59         "connect=<connect ports?>"
  60         "channel_map=<channel map>")
  61
  62 #define DEFAULT_SOURCE_NAME "jack_in"
  63
  64 struct userdata {
  65     pa_core *core;
  66     pa_module *module;
  67
  68     pa_source *source;
  69
  70     unsigned channels;
  71
  72     jack_port_t* port[PA_CHANNELS_MAX];
  73     jack_client_t *client;
  74
  75     pthread_mutex_t mutex;
  76     pthread_cond_t cond;
  77
  78     void * buffer[PA_CHANNELS_MAX];
  79     jack_nframes_t frames_posted;
  80     int quit_requested;
  81
  82     int pipe_fds[2];
  83     pa_io_event *io_event;
  84
  85     jack_nframes_t frames_in_buffer;
  86     jack_nframes_t timestamp;
  87 };
  88
  89 static const char* const valid_modargs[] = {
  90     "source_name",
  91     "server_name",
  92     "client_name",
  93     "channels",
  94     "connect",
  95     "channel_map",
  96     NULL
  97 };
  98
  99 static void stop_source(struct userdata *u) {
 100     assert (u);
 101
 102     jack_client_close(u->client);
 103     u->client = NULL;
 104     u->core->mainloop->io_free(u->io_event);
 105     u->io_event = NULL;
 106     pa_source_disconnect(u->source);
 107     pa_source_unref(u->source);
 108     u->source = NULL;
 109     pa_module_unload_request(u->module);
 110 }
 111
 112 static void io_event_cb(pa_mainloop_api *m, pa_io_event *e, int fd, pa_io_event_flags_t flags, void *userdata) {
 113     struct userdata *u = userdata;
 114     char x;
 115
 116     assert(m);
 117     assert(flags == PA_IO_EVENT_INPUT);
 118     assert(u);
 119     assert(u->pipe_fds[0] == fd);
 120
 121     read(fd, &x, 1);
 122
 123     if (u->quit_requested) {
 124         stop_source(u);
 125         u->quit_requested = 0;
 126         return;
 127     }
 128
 129     pthread_mutex_lock(&u->mutex);
 130
 131     if (u->frames_posted > 0) {
 132         unsigned fs;
 133         jack_nframes_t frame_idx;
 134         pa_memchunk chunk;
 135
 136         fs = pa_frame_size(&u->source->sample_spec);
 137
 138         chunk.memblock = pa_memblock_new(chunk.length = u->frames_posted * fs, u->core->memblock_stat);
 139         chunk.index = 0;
 140
 141         for (frame_idx = 0; frame_idx < u->frames_posted; frame_idx ++) {
 142             unsigned c;
 143
 144             for (c = 0; c < u->channels; c++) {
 145                 float *s = ((float*) u->buffer[c]) + frame_idx;
 146                 float *d = ((float*) ((uint8_t*) chunk.memblock->data + chunk.index)) + (frame_idx * u->channels) + c;
 147
 148                 *d = *s;
 149             }
 150         }
 151
 152         pa_source_post(u->source, &chunk);
 153         pa_memblock_unref(chunk.memblock);
 154
 155         u->frames_posted = 0;
 156
 157         pthread_cond_signal(&u->cond);
 158     }
 159
 160     pthread_mutex_unlock(&u->mutex);
 161 }
 162
 163 static void request_post(struct userdata *u) {
 164     char c = 'x';
 165     assert(u);
 166
 167     assert(u->pipe_fds[1] >= 0);
 168     write(u->pipe_fds[1], &c, 1);
 169 }
 170
 171 static void jack_shutdown(void *arg) {
 172     struct userdata *u = arg;
 173     assert(u);
 174
 175     u->quit_requested = 1;
 176     request_post(u);
 177 }
 178
 179 static int jack_process(jack_nframes_t nframes, void *arg) {
 180     struct userdata *u = arg;
 181     assert(u);
 182
 183     if (jack_transport_query(u->client, NULL) == JackTransportRolling) {
 184         unsigned c;
 185
 186         pthread_mutex_lock(&u->mutex);
 187
 188         u->frames_posted = nframes;
 189
 190         for (c = 0; c < u->channels; c++) {
 191             u->buffer[c] = jack_port_get_buffer(u->port[c], nframes);
 192             assert(u->buffer[c]);
 193         }
 194
 195         request_post(u);
 196
 197         pthread_cond_wait(&u->cond, &u->mutex);
 198
 199         u->frames_in_buffer = nframes;
 200         u->timestamp = jack_get_current_transport_frame(u->client);
 201
 202         pthread_mutex_unlock(&u->mutex);
 203     }
 204
 205     return 0;
 206 }
 207
 208 static pa_usec_t source_get_latency_cb(pa_source *s) {
 209     struct userdata *u;
 210     jack_nframes_t n, l, d;
 211
 212     assert(s);
 213     u = s->userdata;
 214
 215     if (jack_transport_query(u->client, NULL) != JackTransportRolling)
 216         return 0;
 217
 218     n = jack_get_current_transport_frame(u->client);
 219
 220     if (n < u->timestamp)
 221         return 0;
 222
 223     d = n - u->timestamp;
 224     l = jack_port_get_total_latency(u->client, u->port[0]);
 225
 226     return pa_bytes_to_usec((l + d) * pa_frame_size(&s->sample_spec), &s->sample_spec);
 227 }
 228
 229 static void jack_error_func(const char*t) {
 230     pa_log_warn(__FILE__": JACK error >%s<", t);
 231 }
 232
 233 int pa__init(pa_core *c, pa_module*m) {
 234     struct userdata *u = NULL;
 235     pa_sample_spec ss;
 236     pa_channel_map map;
 237     pa_modargs *ma = NULL;
 238     jack_status_t status;
 239     const char *server_name, *client_name;
 240     uint32_t channels = 0;
 241     int connect = 1;
 242     unsigned i;
 243     const char **ports = NULL, **p;
 244
 245     assert(c);
 246     assert(m);
 247
 248     jack_set_error_function(jack_error_func);
 249
 250     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 251         pa_log(__FILE__": failed to parse module arguments.");
 252         goto fail;
 253     }
 254
 255     if (pa_modargs_get_value_boolean(ma, "connect", &connect) < 0) {
 256         pa_log(__FILE__": failed to parse connect= argument.");
 257         goto fail;
 258     }
 259
 260     server_name = pa_modargs_get_value(ma, "server_name", NULL);
 261     client_name = pa_modargs_get_value(ma, "client_name", "polypaudio");
 262
 263     u = pa_xnew0(struct userdata, 1);
 264     m->userdata = u;
 265     u->core = c;
 266     u->module = m;
 267     u->pipe_fds[0] = u->pipe_fds[1] = -1;
 268
 269     pthread_mutex_init(&u->mutex, NULL);
 270     pthread_cond_init(&u->cond, NULL);
 271
 272     if (pipe(u->pipe_fds) < 0) {
 273         pa_log(__FILE__": pipe() failed: %s", strerror(errno));
 274         goto fail;
 275     }
 276
 277     pa_make_nonblock_fd(u->pipe_fds[1]);
 278
 279     if (!(u->client = jack_client_open(client_name, server_name ? JackServerName : JackNullOption, &status, server_name))) {
 280         pa_log(__FILE__": jack_client_open() failed.");
 281         goto fail;
 282     }
 283
 284     ports = jack_get_ports(u->client, NULL, NULL, JackPortIsPhysical|JackPortIsOutput);
 285
 286     channels = 0;
 287     for (p = ports; *p; p++)
 288         channels++;
 289
 290     if (!channels)
 291         channels = c->default_sample_spec.channels;
 292
 293     if (pa_modargs_get_value_u32(ma, "channels", &channels) < 0 || channels <= 0 || channels >= PA_CHANNELS_MAX) {
 294         pa_log(__FILE__": failed to parse channels= argument.");
 295         goto fail;
 296     }
 297
 298     pa_channel_map_init_auto(&map, channels, PA_CHANNEL_MAP_ALSA);
 299     if (pa_modargs_get_channel_map(ma, &map) < 0 || map.channels != channels) {
 300         pa_log(__FILE__": failed to parse channel_map= argument.");
 301         goto fail;
 302     }
 303
 304     pa_log_info(__FILE__": Successfully connected as '%s'", jack_get_client_name(u->client));
 305
 306     ss.channels = u->channels = channels;
 307     ss.rate = jack_get_sample_rate(u->client);
 308     ss.format = PA_SAMPLE_FLOAT32NE;
 309
 310     assert(pa_sample_spec_valid(&ss));
 311
 312     for (i = 0; i < ss.channels; i++) {
 313         if (!(u->port[i] = jack_port_register(u->client, pa_channel_position_to_string(map.map[i]), JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput|JackPortIsTerminal, 0))) {
 314             pa_log(__FILE__": jack_port_register() failed.");
 315             goto fail;
 316         }
 317     }
 318
 319     if (!(u->source = pa_source_new(c, __FILE__, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss, &map))) {
 320         pa_log(__FILE__": failed to create source.");
 321         goto fail;
 322     }
 323
 324     u->source->userdata = u;
 325     pa_source_set_owner(u->source, m);
 326     u->source->description = pa_sprintf_malloc("Jack source (%s)", jack_get_client_name(u->client));
 327     u->source->get_latency = source_get_latency_cb;
 328
 329     jack_set_process_callback(u->client, jack_process, u);
 330     jack_on_shutdown(u->client, jack_shutdown, u);
 331
 332     if (jack_activate(u->client)) {
 333         pa_log(__FILE__": jack_activate() failed");
 334         goto fail;
 335     }
 336
 337     if (connect) {
 338         for (i = 0, p = ports; i < ss.channels; i++, p++) {
 339
 340             if (!*p) {
 341                 pa_log(__FILE__": not enough physical output ports, leaving unconnected.");
 342                 break;
 343             }
 344
 345             pa_log_info(__FILE__": connecting %s to %s", jack_port_name(u->port[i]), *p);
 346
 347             if (jack_connect(u->client, *p, jack_port_name(u->port[i]))) {
 348                 pa_log(__FILE__": failed to connect %s to %s, leaving unconnected.", jack_port_name(u->port[i]), *p);
 349                 break;
 350             }
 351         }
 352
 353     }
 354
 355     u->io_event = c->mainloop->io_new(c->mainloop, u->pipe_fds[0], PA_IO_EVENT_INPUT, io_event_cb, u);
 356
 357     free(ports);
 358     pa_modargs_free(ma);
 359
 360     return 0;
 361
 362 fail:
 363     if (ma)
 364         pa_modargs_free(ma);
 365
 366     free(ports);
 367
 368     pa__done(c, m);
 369
 370     return -1;
 371 }
 372
 373 void pa__done(pa_core *c, pa_module*m) {
 374     struct userdata *u;
 375     assert(c && m);
 376
 377     if (!(u = m->userdata))
 378         return;
 379
 380     if (u->client)
 381         jack_client_close(u->client);
 382
 383     if (u->io_event)
 384         c->mainloop->io_free(u->io_event);
 385
 386     if (u->source) {
 387         pa_source_disconnect(u->source);
 388         pa_source_unref(u->source);
 389     }
 390
 391     if (u->pipe_fds[0] >= 0)
 392         close(u->pipe_fds[0]);
 393     if (u->pipe_fds[1] >= 0)
 394         close(u->pipe_fds[1]);
 395
 396     pthread_mutex_destroy(&u->mutex);
 397     pthread_cond_destroy(&u->cond);
 398     pa_xfree(u);
 399 }