code.delx.au - pulseaudio/blob - src/modules/module-jack-sink.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/sink.h>
  43 #include <polypcore/module.h>
  44 #include <polypcore/core-util.h>
  45 #include <polypcore/modargs.h>
  46 #include <polypcore/log.h>
  47 #include <polyp/mainloop-api.h>
  48
  49 #include "module-jack-sink-symdef.h"
  50
  51 PA_MODULE_AUTHOR("Lennart Poettering")
  52 PA_MODULE_DESCRIPTION("Jack Sink")
  53 PA_MODULE_VERSION(PACKAGE_VERSION)
  54 PA_MODULE_USAGE(
  55         "sink_name=<name of sink> "
  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_SINK_NAME "jack_out"
  63
  64 struct userdata {
  65     pa_core *core;
  66     pa_module *module;
  67
  68     pa_sink *sink;
  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_requested;
  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     "sink_name",
  91     "server_name",
  92     "client_name",
  93     "channels",
  94     "connect",
  95     "channel_map",
  96     NULL
  97 };
  98
  99 static void stop_sink(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_sink_disconnect(u->sink);
 107     pa_sink_unref(u->sink);
 108     u->sink = 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(e);
 118     assert(flags == PA_IO_EVENT_INPUT);
 119     assert(u);
 120     assert(u->pipe_fds[0] == fd);
 121
 122     read(fd, &x, 1);
 123
 124     if (u->quit_requested) {
 125         stop_sink(u);
 126         u->quit_requested = 0;
 127         return;
 128     }
 129
 130     pthread_mutex_lock(&u->mutex);
 131
 132     if (u->frames_requested > 0) {
 133         unsigned fs;
 134         jack_nframes_t frame_idx;
 135         pa_memchunk chunk;
 136
 137         fs = pa_frame_size(&u->sink->sample_spec);
 138
 139         pa_sink_render_full(u->sink, u->frames_requested * fs, &chunk);
 140
 141         for (frame_idx = 0; frame_idx < u->frames_requested; frame_idx ++) {
 142             unsigned c;
 143
 144             for (c = 0; c < u->channels; c++) {
 145                 float *s = ((float*) ((uint8_t*) chunk.memblock->data + chunk.index)) + (frame_idx * u->channels) + c;
 146                 float *d = ((float*) u->buffer[c]) + frame_idx;
 147
 148                 *d = *s;
 149             }
 150         }
 151
 152         pa_memblock_unref(chunk.memblock);
 153
 154         u->frames_requested = 0;
 155
 156         pthread_cond_signal(&u->cond);
 157     }
 158
 159     pthread_mutex_unlock(&u->mutex);
 160 }
 161
 162 static void request_render(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_render(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_requested = 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_render(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 sink_get_latency_cb(pa_sink *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]) + u->frames_in_buffer;
 224
 225     if (d >= l)
 226         return 0;
 227
 228     return pa_bytes_to_usec((l - d) * pa_frame_size(&s->sample_spec), &s->sample_spec);
 229 }
 230
 231 static void jack_error_func(const char*t) {
 232     pa_log_warn(__FILE__": JACK error >%s<", t);
 233 }
 234
 235 int pa__init(pa_core *c, pa_module*m) {
 236     struct userdata *u = NULL;
 237     pa_sample_spec ss;
 238     pa_channel_map map;
 239     pa_modargs *ma = NULL;
 240     jack_status_t status;
 241     const char *server_name, *client_name;
 242     uint32_t channels = 0;
 243     int connect = 1;
 244     unsigned i;
 245     const char **ports = NULL, **p;
 246
 247     assert(c);
 248     assert(m);
 249
 250     jack_set_error_function(jack_error_func);
 251
 252     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 253         pa_log(__FILE__": failed to parse module arguments.");
 254         goto fail;
 255     }
 256
 257     if (pa_modargs_get_value_boolean(ma, "connect", &connect) < 0) {
 258         pa_log(__FILE__": failed to parse connect= argument.");
 259         goto fail;
 260     }
 261
 262     server_name = pa_modargs_get_value(ma, "server_name", NULL);
 263     client_name = pa_modargs_get_value(ma, "client_name", "polypaudio");
 264
 265     u = pa_xnew0(struct userdata, 1);
 266     m->userdata = u;
 267     u->core = c;
 268     u->module = m;
 269     u->pipe_fds[0] = u->pipe_fds[1] = -1;
 270
 271     pthread_mutex_init(&u->mutex, NULL);
 272     pthread_cond_init(&u->cond, NULL);
 273
 274     if (pipe(u->pipe_fds) < 0) {
 275         pa_log(__FILE__": pipe() failed: %s", strerror(errno));
 276         goto fail;
 277     }
 278
 279     pa_make_nonblock_fd(u->pipe_fds[1]);
 280
 281     if (!(u->client = jack_client_open(client_name, server_name ? JackServerName : JackNullOption, &status, server_name))) {
 282         pa_log(__FILE__": jack_client_open() failed.");
 283         goto fail;
 284     }
 285
 286     ports = jack_get_ports(u->client, NULL, NULL, JackPortIsPhysical|JackPortIsInput);
 287
 288     channels = 0;
 289     for (p = ports; *p; p++)
 290         channels++;
 291
 292     if (!channels)
 293         channels = c->default_sample_spec.channels;
 294
 295     if (pa_modargs_get_value_u32(ma, "channels", &channels) < 0 || channels <= 0 || channels >= PA_CHANNELS_MAX) {
 296         pa_log(__FILE__": failed to parse channels= argument.");
 297         goto fail;
 298     }
 299
 300     pa_channel_map_init_auto(&map, channels, PA_CHANNEL_MAP_ALSA);
 301     if (pa_modargs_get_channel_map(ma, &map) < 0 || map.channels != channels) {
 302         pa_log(__FILE__": failed to parse channel_map= argument.");
 303         goto fail;
 304     }
 305
 306     pa_log_info(__FILE__": Successfully connected as '%s'", jack_get_client_name(u->client));
 307
 308     ss.channels = u->channels = channels;
 309     ss.rate = jack_get_sample_rate(u->client);
 310     ss.format = PA_SAMPLE_FLOAT32NE;
 311
 312     assert(pa_sample_spec_valid(&ss));
 313
 314     for (i = 0; i < ss.channels; i++) {
 315         if (!(u->port[i] = jack_port_register(u->client, pa_channel_position_to_string(map.map[i]), JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput|JackPortIsTerminal, 0))) {
 316             pa_log(__FILE__": jack_port_register() failed.");
 317             goto fail;
 318         }
 319     }
 320
 321     if (!(u->sink = pa_sink_new(c, __FILE__, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss, &map))) {
 322         pa_log(__FILE__": failed to create sink.");
 323         goto fail;
 324     }
 325
 326     u->sink->userdata = u;
 327     pa_sink_set_owner(u->sink, m);
 328     u->sink->description = pa_sprintf_malloc("Jack sink (%s)", jack_get_client_name(u->client));
 329     u->sink->get_latency = sink_get_latency_cb;
 330
 331     jack_set_process_callback(u->client, jack_process, u);
 332     jack_on_shutdown(u->client, jack_shutdown, u);
 333
 334     if (jack_activate(u->client)) {
 335         pa_log(__FILE__": jack_activate() failed");
 336         goto fail;
 337     }
 338
 339     if (connect) {
 340         for (i = 0, p = ports; i < ss.channels; i++, p++) {
 341
 342             if (!*p) {
 343                 pa_log(__FILE__": not enough physical output ports, leaving unconnected.");
 344                 break;
 345             }
 346
 347             pa_log_info(__FILE__": connecting %s to %s", jack_port_name(u->port[i]), *p);
 348
 349             if (jack_connect(u->client, jack_port_name(u->port[i]), *p)) {
 350                 pa_log(__FILE__": failed to connect %s to %s, leaving unconnected.", jack_port_name(u->port[i]), *p);
 351                 break;
 352             }
 353         }
 354
 355     }
 356
 357     u->io_event = c->mainloop->io_new(c->mainloop, u->pipe_fds[0], PA_IO_EVENT_INPUT, io_event_cb, u);
 358
 359     free(ports);
 360     pa_modargs_free(ma);
 361
 362     return 0;
 363
 364 fail:
 365     if (ma)
 366         pa_modargs_free(ma);
 367
 368     free(ports);
 369
 370     pa__done(c, m);
 371
 372     return -1;
 373 }
 374
 375 void pa__done(pa_core *c, pa_module*m) {
 376     struct userdata *u;
 377     assert(c && m);
 378
 379     if (!(u = m->userdata))
 380         return;
 381
 382     if (u->client)
 383         jack_client_close(u->client);
 384
 385     if (u->io_event)
 386         c->mainloop->io_free(u->io_event);
 387
 388     if (u->sink) {
 389         pa_sink_disconnect(u->sink);
 390         pa_sink_unref(u->sink);
 391     }
 392
 393     if (u->pipe_fds[0] >= 0)
 394         close(u->pipe_fds[0]);
 395     if (u->pipe_fds[1] >= 0)
 396         close(u->pipe_fds[1]);
 397
 398     pthread_mutex_destroy(&u->mutex);
 399     pthread_cond_destroy(&u->cond);
 400     pa_xfree(u);
 401 }