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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <stdlib.h>
  29 #include <sys/stat.h>
  30 #include <stdio.h>
  31 #include <assert.h>
  32 #include <errno.h>
  33 #include <string.h>
  34 #include <fcntl.h>
  35 #include <unistd.h>
  36 #include <limits.h>
  37 #include <pthread.h>
  38
  39 #include <jack/jack.h>
  40
  41 #include <pulse/xmalloc.h>
  42
  43 #include <pulsecore/core-error.h>
  44 #include <pulsecore/iochannel.h>
  45 #include <pulsecore/sink.h>
  46 #include <pulsecore/module.h>
  47 #include <pulsecore/core-util.h>
  48 #include <pulsecore/modargs.h>
  49 #include <pulsecore/log.h>
  50 #include <pulse/mainloop-api.h>
  51
  52 #include "module-jack-sink-symdef.h"
  53
  54 PA_MODULE_AUTHOR("Lennart Poettering")
  55 PA_MODULE_DESCRIPTION("Jack Sink")
  56 PA_MODULE_VERSION(PACKAGE_VERSION)
  57 PA_MODULE_USAGE(
  58         "sink_name=<name of sink> "
  59         "server_name=<jack server name> "
  60         "client_name=<jack client name> "
  61         "channels=<number of channels> "
  62         "connect=<connect ports?> "
  63         "channel_map=<channel map>")
  64
  65 #define DEFAULT_SINK_NAME "jack_out"
  66
  67 struct userdata {
  68     pa_core *core;
  69     pa_module *module;
  70
  71     pa_sink *sink;
  72
  73     unsigned channels;
  74
  75     jack_port_t* port[PA_CHANNELS_MAX];
  76     jack_client_t *client;
  77
  78     pthread_mutex_t mutex;
  79     pthread_cond_t cond;
  80
  81     void * buffer[PA_CHANNELS_MAX];
  82     jack_nframes_t frames_requested;
  83     int quit_requested;
  84
  85     int pipe_fd_type;
  86     int pipe_fds[2];
  87     pa_io_event *io_event;
  88
  89     jack_nframes_t frames_in_buffer;
  90     jack_nframes_t timestamp;
  91 };
  92
  93 static const char* const valid_modargs[] = {
  94     "sink_name",
  95     "server_name",
  96     "client_name",
  97     "channels",
  98     "connect",
  99     "channel_map",
 100     NULL
 101 };
 102
 103 static void stop_sink(struct userdata *u) {
 104     assert (u);
 105
 106     jack_client_close(u->client);
 107     u->client = NULL;
 108     u->core->mainloop->io_free(u->io_event);
 109     u->io_event = NULL;
 110     pa_sink_disconnect(u->sink);
 111     pa_sink_unref(u->sink);
 112     u->sink = NULL;
 113     pa_module_unload_request(u->module);
 114 }
 115
 116 static void io_event_cb(pa_mainloop_api *m, pa_io_event *e, int fd, pa_io_event_flags_t flags, void *userdata) {
 117     struct userdata *u = userdata;
 118     char x;
 119
 120     assert(m);
 121     assert(e);
 122     assert(flags == PA_IO_EVENT_INPUT);
 123     assert(u);
 124     assert(u->pipe_fds[0] == fd);
 125
 126     pa_read(fd, &x, 1, &u->pipe_fd_type);
 127
 128     if (u->quit_requested) {
 129         stop_sink(u);
 130         u->quit_requested = 0;
 131         return;
 132     }
 133
 134     pthread_mutex_lock(&u->mutex);
 135
 136     if (u->frames_requested > 0) {
 137         unsigned fs;
 138         jack_nframes_t frame_idx;
 139         pa_memchunk chunk;
 140
 141         fs = pa_frame_size(&u->sink->sample_spec);
 142
 143         pa_sink_render_full(u->sink, u->frames_requested * fs, &chunk);
 144
 145         for (frame_idx = 0; frame_idx < u->frames_requested; frame_idx ++) {
 146             unsigned c;
 147
 148             for (c = 0; c < u->channels; c++) {
 149                 float *s = ((float*) ((uint8_t*) chunk.memblock->data + chunk.index)) + (frame_idx * u->channels) + c;
 150                 float *d = ((float*) u->buffer[c]) + frame_idx;
 151
 152                 *d = *s;
 153             }
 154         }
 155
 156         pa_memblock_unref(chunk.memblock);
 157
 158         u->frames_requested = 0;
 159
 160         pthread_cond_signal(&u->cond);
 161     }
 162
 163     pthread_mutex_unlock(&u->mutex);
 164 }
 165
 166 static void request_render(struct userdata *u) {
 167     char c = 'x';
 168     assert(u);
 169
 170     assert(u->pipe_fds[1] >= 0);
 171     pa_write(u->pipe_fds[1], &c, 1, &u->pipe_fd_type);
 172 }
 173
 174 static void jack_shutdown(void *arg) {
 175     struct userdata *u = arg;
 176     assert(u);
 177
 178     u->quit_requested = 1;
 179     request_render(u);
 180 }
 181
 182 static int jack_process(jack_nframes_t nframes, void *arg) {
 183     struct userdata *u = arg;
 184     assert(u);
 185
 186     if (jack_transport_query(u->client, NULL) == JackTransportRolling) {
 187         unsigned c;
 188
 189         pthread_mutex_lock(&u->mutex);
 190
 191         u->frames_requested = nframes;
 192
 193         for (c = 0; c < u->channels; c++) {
 194             u->buffer[c] = jack_port_get_buffer(u->port[c], nframes);
 195             assert(u->buffer[c]);
 196         }
 197
 198         request_render(u);
 199
 200         pthread_cond_wait(&u->cond, &u->mutex);
 201
 202         u->frames_in_buffer = nframes;
 203         u->timestamp = jack_get_current_transport_frame(u->client);
 204
 205         pthread_mutex_unlock(&u->mutex);
 206     }
 207
 208     return 0;
 209 }
 210
 211 static pa_usec_t sink_get_latency_cb(pa_sink *s) {
 212     struct userdata *u;
 213     jack_nframes_t n, l, d;
 214
 215     assert(s);
 216     u = s->userdata;
 217
 218     if (jack_transport_query(u->client, NULL) != JackTransportRolling)
 219         return 0;
 220
 221     n = jack_get_current_transport_frame(u->client);
 222
 223     if (n < u->timestamp)
 224         return 0;
 225
 226     d = n - u->timestamp;
 227     l = jack_port_get_total_latency(u->client, u->port[0]) + u->frames_in_buffer;
 228
 229     if (d >= l)
 230         return 0;
 231
 232     return pa_bytes_to_usec((l - d) * pa_frame_size(&s->sample_spec), &s->sample_spec);
 233 }
 234
 235 static void jack_error_func(const char*t) {
 236     pa_log_warn("JACK error >%s<", t);
 237 }
 238
 239 int pa__init(pa_core *c, pa_module*m) {
 240     struct userdata *u = NULL;
 241     pa_sample_spec ss;
 242     pa_channel_map map;
 243     pa_modargs *ma = NULL;
 244     jack_status_t status;
 245     const char *server_name, *client_name;
 246     uint32_t channels = 0;
 247     int do_connect = 1;
 248     unsigned i;
 249     const char **ports = NULL, **p;
 250     char *t;
 251
 252     assert(c);
 253     assert(m);
 254
 255     jack_set_error_function(jack_error_func);
 256
 257     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 258         pa_log("failed to parse module arguments.");
 259         goto fail;
 260     }
 261
 262     if (pa_modargs_get_value_boolean(ma, "connect", &do_connect) < 0) {
 263         pa_log("failed to parse connect= argument.");
 264         goto fail;
 265     }
 266
 267     server_name = pa_modargs_get_value(ma, "server_name", NULL);
 268     client_name = pa_modargs_get_value(ma, "client_name", "PulseAudio");
 269
 270     u = pa_xnew0(struct userdata, 1);
 271     m->userdata = u;
 272     u->core = c;
 273     u->module = m;
 274     u->pipe_fds[0] = u->pipe_fds[1] = -1;
 275     u->pipe_fd_type = 0;
 276
 277     pthread_mutex_init(&u->mutex, NULL);
 278     pthread_cond_init(&u->cond, NULL);
 279
 280     if (pipe(u->pipe_fds) < 0) {
 281         pa_log("pipe() failed: %s", pa_cstrerror(errno));
 282         goto fail;
 283     }
 284
 285     pa_make_nonblock_fd(u->pipe_fds[1]);
 286
 287     if (!(u->client = jack_client_open(client_name, server_name ? JackServerName : JackNullOption, &status, server_name))) {
 288         pa_log("jack_client_open() failed.");
 289         goto fail;
 290     }
 291
 292     ports = jack_get_ports(u->client, NULL, NULL, JackPortIsPhysical|JackPortIsInput);
 293
 294     channels = 0;
 295     for (p = ports; *p; p++)
 296         channels++;
 297
 298     if (!channels)
 299         channels = c->default_sample_spec.channels;
 300
 301     if (pa_modargs_get_value_u32(ma, "channels", &channels) < 0 || channels <= 0 || channels >= PA_CHANNELS_MAX) {
 302         pa_log("failed to parse channels= argument.");
 303         goto fail;
 304     }
 305
 306     pa_channel_map_init_auto(&map, channels, PA_CHANNEL_MAP_ALSA);
 307     if (pa_modargs_get_channel_map(ma, &map) < 0 || map.channels != channels) {
 308         pa_log("failed to parse channel_map= argument.");
 309         goto fail;
 310     }
 311
 312     pa_log_info("Successfully connected as '%s'", jack_get_client_name(u->client));
 313
 314     ss.channels = u->channels = channels;
 315     ss.rate = jack_get_sample_rate(u->client);
 316     ss.format = PA_SAMPLE_FLOAT32NE;
 317
 318     assert(pa_sample_spec_valid(&ss));
 319
 320     for (i = 0; i < ss.channels; i++) {
 321         if (!(u->port[i] = jack_port_register(u->client, pa_channel_position_to_string(map.map[i]), JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput|JackPortIsTerminal, 0))) {
 322             pa_log("jack_port_register() failed.");
 323             goto fail;
 324         }
 325     }
 326
 327     if (!(u->sink = pa_sink_new(c, __FILE__, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss, &map))) {
 328         pa_log("failed to create sink.");
 329         goto fail;
 330     }
 331
 332     u->sink->userdata = u;
 333     pa_sink_set_owner(u->sink, m);
 334     pa_sink_set_description(u->sink, t = pa_sprintf_malloc("Jack sink (%s)", jack_get_client_name(u->client)));
 335     pa_xfree(t);
 336     u->sink->get_latency = sink_get_latency_cb;
 337
 338     jack_set_process_callback(u->client, jack_process, u);
 339     jack_on_shutdown(u->client, jack_shutdown, u);
 340
 341     if (jack_activate(u->client)) {
 342         pa_log("jack_activate() failed");
 343         goto fail;
 344     }
 345
 346     if (do_connect) {
 347         for (i = 0, p = ports; i < ss.channels; i++, p++) {
 348
 349             if (!*p) {
 350                 pa_log("not enough physical output ports, leaving unconnected.");
 351                 break;
 352             }
 353
 354             pa_log_info("connecting %s to %s", jack_port_name(u->port[i]), *p);
 355
 356             if (jack_connect(u->client, jack_port_name(u->port[i]), *p)) {
 357                 pa_log("failed to connect %s to %s, leaving unconnected.", jack_port_name(u->port[i]), *p);
 358                 break;
 359             }
 360         }
 361
 362     }
 363
 364     u->io_event = c->mainloop->io_new(c->mainloop, u->pipe_fds[0], PA_IO_EVENT_INPUT, io_event_cb, u);
 365
 366     free(ports);
 367     pa_modargs_free(ma);
 368
 369     return 0;
 370
 371 fail:
 372     if (ma)
 373         pa_modargs_free(ma);
 374
 375     free(ports);
 376
 377     pa__done(c, m);
 378
 379     return -1;
 380 }
 381
 382 void pa__done(pa_core *c, pa_module*m) {
 383     struct userdata *u;
 384     assert(c && m);
 385
 386     if (!(u = m->userdata))
 387         return;
 388
 389     if (u->client)
 390         jack_client_close(u->client);
 391
 392     if (u->io_event)
 393         c->mainloop->io_free(u->io_event);
 394
 395     if (u->sink) {
 396         pa_sink_disconnect(u->sink);
 397         pa_sink_unref(u->sink);
 398     }
 399
 400     if (u->pipe_fds[0] >= 0)
 401         close(u->pipe_fds[0]);
 402     if (u->pipe_fds[1] >= 0)
 403         close(u->pipe_fds[1]);
 404
 405     pthread_mutex_destroy(&u->mutex);
 406     pthread_cond_destroy(&u->cond);
 407     pa_xfree(u);
 408 }