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 <polypcore/iochannel.h>
  40 #include <polypcore/sink.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-sink-symdef.h"
  49
  50 PA_MODULE_AUTHOR("Lennart Poettering")
  51 PA_MODULE_DESCRIPTION("Jack Sink")
  52 PA_MODULE_VERSION(PACKAGE_VERSION)
  53 PA_MODULE_USAGE(
  54         "sink_name=<name of sink> "
  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_SINK_NAME "jack_out"
  62
  63 struct userdata {
  64     pa_core *core;
  65     pa_module *module;
  66
  67     pa_sink *sink;
  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_requested;
  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     "sink_name",
  90     "server_name",
  91     "client_name",
  92     "channels",
  93     "connect",
  94     "channel_map",
  95     NULL
  96 };
  97
  98 static void stop_sink(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_sink_disconnect(u->sink);
 106     pa_sink_unref(u->sink);
 107     u->sink = 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(e);
 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_sink(u);
 125         u->quit_requested = 0;
 126         return;
 127     }
 128
 129     pthread_mutex_lock(&u->mutex);
 130
 131     if (u->frames_requested > 0) {
 132         unsigned fs;
 133         jack_nframes_t frame_idx;
 134         pa_memchunk chunk;
 135
 136         fs = pa_frame_size(&u->sink->sample_spec);
 137
 138         pa_sink_render_full(u->sink, u->frames_requested * fs, &chunk);
 139
 140         for (frame_idx = 0; frame_idx < u->frames_requested; frame_idx ++) {
 141             unsigned c;
 142
 143             for (c = 0; c < u->channels; c++) {
 144                 float *s = ((float*) ((uint8_t*) chunk.memblock->data + chunk.index)) + (frame_idx * u->channels) + c;
 145                 float *d = ((float*) u->buffer[c]) + frame_idx;
 146
 147                 *d = *s;
 148             }
 149         }
 150
 151         pa_memblock_unref(chunk.memblock);
 152
 153         u->frames_requested = 0;
 154
 155         pthread_cond_signal(&u->cond);
 156     }
 157
 158     pthread_mutex_unlock(&u->mutex);
 159 }
 160
 161 static void request_render(struct userdata *u) {
 162     char c = 'x';
 163     assert(u);
 164
 165     assert(u->pipe_fds[1] >= 0);
 166     write(u->pipe_fds[1], &c, 1);
 167 }
 168
 169 static void jack_shutdown(void *arg) {
 170     struct userdata *u = arg;
 171     assert(u);
 172
 173     u->quit_requested = 1;
 174     request_render(u);
 175 }
 176
 177 static int jack_process(jack_nframes_t nframes, void *arg) {
 178     struct userdata *u = arg;
 179     assert(u);
 180
 181     if (jack_transport_query(u->client, NULL) == JackTransportRolling) {
 182         unsigned c;
 183
 184         pthread_mutex_lock(&u->mutex);
 185
 186         u->frames_requested = nframes;
 187
 188         for (c = 0; c < u->channels; c++) {
 189             u->buffer[c] = jack_port_get_buffer(u->port[c], nframes);
 190             assert(u->buffer[c]);
 191         }
 192
 193         request_render(u);
 194
 195         pthread_cond_wait(&u->cond, &u->mutex);
 196
 197         u->frames_in_buffer = nframes;
 198         u->timestamp = jack_get_current_transport_frame(u->client);
 199
 200         pthread_mutex_unlock(&u->mutex);
 201     }
 202
 203     return 0;
 204 }
 205
 206 static pa_usec_t sink_get_latency_cb(pa_sink *s) {
 207     struct userdata *u;
 208     jack_nframes_t n, l, d;
 209
 210     assert(s);
 211     u = s->userdata;
 212
 213     if (jack_transport_query(u->client, NULL) != JackTransportRolling)
 214         return 0;
 215
 216     n = jack_get_current_transport_frame(u->client);
 217
 218     if (n < u->timestamp)
 219         return 0;
 220
 221     d = n - u->timestamp;
 222     l = jack_port_get_total_latency(u->client, u->port[0]) + u->frames_in_buffer;
 223
 224     if (d >= l)
 225         return 0;
 226
 227     return pa_bytes_to_usec((l - d) * pa_frame_size(&s->sample_spec), &s->sample_spec);
 228 }
 229
 230 static void jack_error_func(const char*t) {
 231     pa_log_warn(__FILE__": JACK error >%s<", t);
 232 }
 233
 234 int pa__init(pa_core *c, pa_module*m) {
 235     struct userdata *u = NULL;
 236     pa_sample_spec ss;
 237     pa_channel_map map;
 238     pa_modargs *ma = NULL;
 239     jack_status_t status;
 240     const char *server_name, *client_name;
 241     uint32_t channels = 0;
 242     int connect = 1;
 243     unsigned i;
 244     const char **ports = NULL, **p;
 245
 246     assert(c);
 247     assert(m);
 248
 249     jack_set_error_function(jack_error_func);
 250
 251     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 252         pa_log(__FILE__": failed to parse module arguments.");
 253         goto fail;
 254     }
 255
 256     if (pa_modargs_get_value_boolean(ma, "connect", &connect) < 0) {
 257         pa_log(__FILE__": failed to parse connect= argument.");
 258         goto fail;
 259     }
 260
 261     server_name = pa_modargs_get_value(ma, "server_name", NULL);
 262     client_name = pa_modargs_get_value(ma, "client_name", "polypaudio");
 263
 264     u = pa_xnew0(struct userdata, 1);
 265     m->userdata = u;
 266     u->core = c;
 267     u->module = m;
 268     u->pipe_fds[0] = u->pipe_fds[1] = -1;
 269
 270     pthread_mutex_init(&u->mutex, NULL);
 271     pthread_cond_init(&u->cond, NULL);
 272
 273     if (pipe(u->pipe_fds) < 0) {
 274         pa_log(__FILE__": pipe() failed: %s", strerror(errno));
 275         goto fail;
 276     }
 277
 278     pa_make_nonblock_fd(u->pipe_fds[1]);
 279
 280     if (!(u->client = jack_client_open(client_name, server_name ? JackServerName : JackNullOption, &status, server_name))) {
 281         pa_log(__FILE__": jack_client_open() failed.");
 282         goto fail;
 283     }
 284
 285     ports = jack_get_ports(u->client, NULL, NULL, JackPortIsPhysical|JackPortIsInput);
 286
 287     channels = 0;
 288     for (p = ports; *p; p++)
 289         channels++;
 290
 291     if (!channels)
 292         channels = c->default_sample_spec.channels;
 293
 294     if (pa_modargs_get_value_u32(ma, "channels", &channels) < 0 || channels <= 0 || channels >= PA_CHANNELS_MAX) {
 295         pa_log(__FILE__": failed to parse channels= argument.");
 296         goto fail;
 297     }
 298
 299     pa_channel_map_init_auto(&map, channels);
 300     if (pa_modargs_get_channel_map(ma, &map) < 0 || map.channels != channels) {
 301         pa_log(__FILE__": failed to parse channel_map= argument.");
 302         goto fail;
 303     }
 304
 305     pa_log_info(__FILE__": Successfully connected as '%s'", jack_get_client_name(u->client));
 306
 307     ss.channels = u->channels = channels;
 308     ss.rate = jack_get_sample_rate(u->client);
 309     ss.format = PA_SAMPLE_FLOAT32NE;
 310
 311     assert(pa_sample_spec_valid(&ss));
 312
 313     for (i = 0; i < ss.channels; i++) {
 314         if (!(u->port[i] = jack_port_register(u->client, pa_channel_position_to_string(map.map[i]), JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput|JackPortIsTerminal, 0))) {
 315             pa_log(__FILE__": jack_port_register() failed.");
 316             goto fail;
 317         }
 318     }
 319
 320     if (!(u->sink = pa_sink_new(c, __FILE__, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss, &map))) {
 321         pa_log(__FILE__": failed to create sink.");
 322         goto fail;
 323     }
 324
 325     u->sink->userdata = u;
 326     pa_sink_set_owner(u->sink, m);
 327     u->sink->description = pa_sprintf_malloc("Jack sink (%s)", jack_get_client_name(u->client));
 328     u->sink->get_latency = sink_get_latency_cb;
 329
 330     jack_set_process_callback(u->client, jack_process, u);
 331     jack_on_shutdown(u->client, jack_shutdown, u);
 332
 333     if (jack_activate(u->client)) {
 334         pa_log(__FILE__": jack_activate() failed");
 335         goto fail;
 336     }
 337
 338     if (connect) {
 339         for (i = 0, p = ports; i < ss.channels; i++, p++) {
 340
 341             if (!*p) {
 342                 pa_log(__FILE__": not enough physical output ports, leaving unconnected.");
 343                 break;
 344             }
 345
 346             pa_log_info(__FILE__": connecting %s to %s", jack_port_name(u->port[i]), *p);
 347
 348             if (jack_connect(u->client, jack_port_name(u->port[i]), *p)) {
 349                 pa_log(__FILE__": failed to connect %s to %s, leaving unconnected.", jack_port_name(u->port[i]), *p);
 350                 break;
 351             }
 352         }
 353
 354     }
 355
 356     u->io_event = c->mainloop->io_new(c->mainloop, u->pipe_fds[0], PA_IO_EVENT_INPUT, io_event_cb, u);
 357
 358     free(ports);
 359     pa_modargs_free(ma);
 360
 361     return 0;
 362
 363 fail:
 364     if (ma)
 365         pa_modargs_free(ma);
 366
 367     free(ports);
 368
 369     pa__done(c, m);
 370
 371     return -1;
 372 }
 373
 374 void pa__done(pa_core *c, pa_module*m) {
 375     struct userdata *u;
 376     assert(c && m);
 377
 378     if (!(u = m->userdata))
 379         return;
 380
 381     if (u->client)
 382         jack_client_close(u->client);
 383
 384     if (u->io_event)
 385         c->mainloop->io_free(u->io_event);
 386
 387     if (u->sink) {
 388         pa_sink_disconnect(u->sink);
 389         pa_sink_unref(u->sink);
 390     }
 391
 392     if (u->pipe_fds[0] >= 0)
 393         close(u->pipe_fds[0]);
 394     if (u->pipe_fds[1] >= 0)
 395         close(u->pipe_fds[1]);
 396
 397     pthread_mutex_destroy(&u->mutex);
 398     pthread_cond_destroy(&u->cond);
 399     pa_xfree(u);
 400 }