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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   PulseAudio 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   PulseAudio 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 PulseAudio; 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 <sys/soundcard.h>
  27 #include <sys/ioctl.h>
  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
  38 #include <pulse/xmalloc.h>
  39 #include <pulse/util.h>
  40
  41 #include <pulsecore/core-error.h>
  42 #include <pulsecore/iochannel.h>
  43 #include <pulsecore/sink.h>
  44 #include <pulsecore/source.h>
  45 #include <pulsecore/module.h>
  46 #include <pulsecore/sample-util.h>
  47 #include <pulsecore/core-util.h>
  48 #include <pulsecore/modargs.h>
  49 #include <pulsecore/log.h>
  50
  51 #include "oss-util.h"
  52 #include "module-oss-symdef.h"
  53
  54 PA_MODULE_AUTHOR("Lennart Poettering")
  55 PA_MODULE_DESCRIPTION("OSS Sink/Source")
  56 PA_MODULE_VERSION(PACKAGE_VERSION)
  57 PA_MODULE_USAGE(
  58         "sink_name=<name for the sink> "
  59         "source_name=<name for the source> "
  60         "device=<OSS device> "
  61         "record=<enable source?> "
  62         "playback=<enable sink?> "
  63         "format=<sample format> "
  64         "channels=<number of channels> "
  65         "rate=<sample rate> "
  66         "fragments=<number of fragments> "
  67         "fragment_size=<fragment size> "
  68         "channel_map=<channel map>")
  69
  70 struct userdata {
  71     pa_sink *sink;
  72     pa_source *source;
  73     pa_iochannel *io;
  74     pa_core *core;
  75
  76     pa_memchunk memchunk, silence;
  77
  78     uint32_t in_fragment_size, out_fragment_size, sample_size;
  79     int use_getospace, use_getispace;
  80
  81     int fd;
  82     pa_module *module;
  83 };
  84
  85 static const char* const valid_modargs[] = {
  86     "sink_name",
  87     "source_name",
  88     "device",
  89     "record",
  90     "playback",
  91     "fragments",
  92     "fragment_size",
  93     "format",
  94     "rate",
  95     "channels",
  96     "channel_map",
  97     NULL
  98 };
  99
 100 #define DEFAULT_DEVICE "/dev/dsp"
 101
 102 static void update_usage(struct userdata *u) {
 103    pa_module_set_used(u->module,
 104                       (u->sink ? pa_sink_used_by(u->sink) : 0) +
 105                       (u->source ? pa_source_used_by(u->source) : 0));
 106 }
 107
 108 static void clear_up(struct userdata *u) {
 109     assert(u);
 110
 111     if (u->sink) {
 112         pa_sink_disconnect(u->sink);
 113         pa_sink_unref(u->sink);
 114         u->sink = NULL;
 115     }
 116
 117     if (u->source) {
 118         pa_source_disconnect(u->source);
 119         pa_source_unref(u->source);
 120         u->source = NULL;
 121     }
 122
 123     if (u->io) {
 124         pa_iochannel_free(u->io);
 125         u->io = NULL;
 126     }
 127 }
 128
 129 static void do_write(struct userdata *u) {
 130     pa_memchunk *memchunk;
 131     ssize_t r;
 132     size_t l;
 133     int loop = 0;
 134
 135     assert(u);
 136
 137     if (!u->sink || !pa_iochannel_is_writable(u->io))
 138         return;
 139
 140     update_usage(u);
 141
 142     l = u->out_fragment_size;
 143
 144     if (u->use_getospace) {
 145         audio_buf_info info;
 146
 147         if (ioctl(u->fd, SNDCTL_DSP_GETOSPACE, &info) < 0)
 148             u->use_getospace = 0;
 149         else {
 150             if (info.bytes/l > 0) {
 151                 l = (info.bytes/l)*l;
 152                 loop = 1;
 153             }
 154         }
 155     }
 156
 157     do {
 158         memchunk = &u->memchunk;
 159
 160         if (!memchunk->length)
 161             if (pa_sink_render(u->sink, l, memchunk) < 0)
 162                 memchunk = &u->silence;
 163
 164         assert(memchunk->memblock);
 165         assert(memchunk->memblock->data);
 166         assert(memchunk->length);
 167
 168         if ((r = pa_iochannel_write(u->io, (uint8_t*) memchunk->memblock->data + memchunk->index, memchunk->length)) < 0) {
 169             pa_log(__FILE__": write() failed: %s", pa_cstrerror(errno));
 170
 171             clear_up(u);
 172             pa_module_unload_request(u->module);
 173             break;
 174         }
 175
 176         if (memchunk == &u->silence)
 177             assert(r % u->sample_size == 0);
 178         else {
 179             u->memchunk.index += r;
 180             u->memchunk.length -= r;
 181
 182             if (u->memchunk.length <= 0) {
 183                 pa_memblock_unref(u->memchunk.memblock);
 184                 u->memchunk.memblock = NULL;
 185             }
 186         }
 187
 188         l = l > (size_t) r ? l - r : 0;
 189     } while (loop && l > 0);
 190 }
 191
 192 static void do_read(struct userdata *u) {
 193     pa_memchunk memchunk;
 194     ssize_t r;
 195     size_t l;
 196     int loop = 0;
 197     assert(u);
 198
 199     if (!u->source || !pa_iochannel_is_readable(u->io) || !pa_idxset_size(u->source->outputs))
 200         return;
 201
 202     update_usage(u);
 203
 204     l = u->in_fragment_size;
 205
 206     if (u->use_getispace) {
 207         audio_buf_info info;
 208
 209         if (ioctl(u->fd, SNDCTL_DSP_GETISPACE, &info) < 0)
 210             u->use_getispace = 0;
 211         else {
 212             if (info.bytes/l > 0) {
 213                 l = (info.bytes/l)*l;
 214                 loop = 1;
 215             }
 216         }
 217     }
 218
 219     do {
 220         memchunk.memblock = pa_memblock_new(l, u->core->memblock_stat);
 221         assert(memchunk.memblock);
 222         if ((r = pa_iochannel_read(u->io, memchunk.memblock->data, memchunk.memblock->length)) < 0) {
 223             pa_memblock_unref(memchunk.memblock);
 224             if (errno != EAGAIN) {
 225                 pa_log(__FILE__": read() failed: %s", pa_cstrerror(errno));
 226                 clear_up(u);
 227                 pa_module_unload_request(u->module);
 228             }
 229             break;
 230         }
 231
 232         assert(r <= (ssize_t) memchunk.memblock->length);
 233         memchunk.length = memchunk.memblock->length = r;
 234         memchunk.index = 0;
 235
 236         pa_source_post(u->source, &memchunk);
 237         pa_memblock_unref(memchunk.memblock);
 238
 239         l = l > (size_t) r ? l - r : 0;
 240     } while (loop && l > 0);
 241 }
 242
 243 static void io_callback(PA_GCC_UNUSED pa_iochannel *io, void*userdata) {
 244     struct userdata *u = userdata;
 245     assert(u);
 246     do_write(u);
 247     do_read(u);
 248 }
 249
 250 static void source_notify_cb(pa_source *s) {
 251     struct userdata *u = s->userdata;
 252     assert(u);
 253     do_read(u);
 254 }
 255
 256 static pa_usec_t sink_get_latency_cb(pa_sink *s) {
 257     pa_usec_t r = 0;
 258     int arg;
 259     struct userdata *u = s->userdata;
 260     assert(s && u && u->sink);
 261
 262     if (ioctl(u->fd, SNDCTL_DSP_GETODELAY, &arg) < 0) {
 263         pa_log_info(__FILE__": device doesn't support SNDCTL_DSP_GETODELAY: %s", pa_cstrerror(errno));
 264         s->get_latency = NULL;
 265         return 0;
 266     }
 267
 268     r += pa_bytes_to_usec(arg, &s->sample_spec);
 269
 270     if (u->memchunk.memblock)
 271         r += pa_bytes_to_usec(u->memchunk.length, &s->sample_spec);
 272
 273     return r;
 274 }
 275
 276 static pa_usec_t source_get_latency_cb(pa_source *s) {
 277     struct userdata *u = s->userdata;
 278     audio_buf_info info;
 279     assert(s && u && u->source);
 280
 281     if (!u->use_getispace)
 282         return 0;
 283
 284     if (ioctl(u->fd, SNDCTL_DSP_GETISPACE, &info) < 0) {
 285         u->use_getispace = 0;
 286         return 0;
 287     }
 288
 289     if (info.bytes <= 0)
 290         return 0;
 291
 292     return pa_bytes_to_usec(info.bytes, &s->sample_spec);
 293 }
 294
 295 static int sink_get_hw_volume(pa_sink *s) {
 296     struct userdata *u = s->userdata;
 297
 298     if (pa_oss_get_pcm_volume(u->fd, &s->sample_spec, &s->hw_volume) < 0) {
 299         pa_log_info(__FILE__": device doesn't support reading mixer settings: %s", pa_cstrerror(errno));
 300         s->get_hw_volume = NULL;
 301         return -1;
 302     }
 303
 304     return 0;
 305 }
 306
 307 static int sink_set_hw_volume(pa_sink *s) {
 308     struct userdata *u = s->userdata;
 309
 310     if (pa_oss_set_pcm_volume(u->fd, &s->sample_spec, &s->hw_volume) < 0) {
 311         pa_log_info(__FILE__": device doesn't support writing mixer settings: %s", pa_cstrerror(errno));
 312         s->set_hw_volume = NULL;
 313         return -1;
 314     }
 315
 316     return 0;
 317 }
 318
 319 static int source_get_hw_volume(pa_source *s) {
 320     struct userdata *u = s->userdata;
 321
 322     if (pa_oss_get_input_volume(u->fd, &s->sample_spec, &s->hw_volume) < 0) {
 323         pa_log_info(__FILE__": device doesn't support reading mixer settings: %s", pa_cstrerror(errno));
 324         s->get_hw_volume = NULL;
 325         return -1;
 326     }
 327
 328     return 0;
 329 }
 330
 331 static int source_set_hw_volume(pa_source *s) {
 332     struct userdata *u = s->userdata;
 333
 334     if (pa_oss_set_input_volume(u->fd, &s->sample_spec, &s->hw_volume) < 0) {
 335         pa_log_info(__FILE__": device doesn't support writing mixer settings: %s", pa_cstrerror(errno));
 336         s->set_hw_volume = NULL;
 337         return -1;
 338     }
 339
 340     return 0;
 341 }
 342
 343 int pa__init(pa_core *c, pa_module*m) {
 344     struct audio_buf_info info;
 345     struct userdata *u = NULL;
 346     const char *p;
 347     int fd = -1;
 348     int nfrags, frag_size, in_frag_size, out_frag_size;
 349     int mode;
 350     int record = 1, playback = 1;
 351     pa_sample_spec ss;
 352     pa_channel_map map;
 353     pa_modargs *ma = NULL;
 354     char hwdesc[64], *t;
 355     const char *name;
 356     char *name_buf = NULL;
 357     int namereg_fail;
 358
 359     assert(c);
 360     assert(m);
 361
 362     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 363         pa_log(__FILE__": failed to parse module arguments.");
 364         goto fail;
 365     }
 366
 367     if (pa_modargs_get_value_boolean(ma, "record", &record) < 0 || pa_modargs_get_value_boolean(ma, "playback", &playback) < 0) {
 368         pa_log(__FILE__": record= and playback= expect numeric argument.");
 369         goto fail;
 370     }
 371
 372     if (!playback && !record) {
 373         pa_log(__FILE__": neither playback nor record enabled for device.");
 374         goto fail;
 375     }
 376
 377     mode = (playback&&record) ? O_RDWR : (playback ? O_WRONLY : (record ? O_RDONLY : 0));
 378
 379     ss = c->default_sample_spec;
 380     if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_OSS) < 0) {
 381         pa_log(__FILE__": failed to parse sample specification or channel map");
 382         goto fail;
 383     }
 384
 385     /* Fix latency to 100ms */
 386     nfrags = 12;
 387     frag_size = pa_bytes_per_second(&ss)/128;
 388
 389     if (pa_modargs_get_value_s32(ma, "fragments", &nfrags) < 0 || pa_modargs_get_value_s32(ma, "fragment_size", &frag_size) < 0) {
 390         pa_log(__FILE__": failed to parse fragments arguments");
 391         goto fail;
 392     }
 393
 394     if ((fd = pa_oss_open(p = pa_modargs_get_value(ma, "device", DEFAULT_DEVICE), &mode, NULL)) < 0)
 395         goto fail;
 396
 397     if (pa_oss_get_hw_description(p, hwdesc, sizeof(hwdesc)) >= 0)
 398         pa_log_info(__FILE__": hardware name is '%s'.", hwdesc);
 399     else
 400         hwdesc[0] = 0;
 401
 402     pa_log_info(__FILE__": device opened in %s mode.", mode == O_WRONLY ? "O_WRONLY" : (mode == O_RDONLY ? "O_RDONLY" : "O_RDWR"));
 403
 404     if (nfrags >= 2 && frag_size >= 1)
 405         if (pa_oss_set_fragments(fd, nfrags, frag_size) < 0)
 406             goto fail;
 407
 408     if (pa_oss_auto_format(fd, &ss) < 0)
 409         goto fail;
 410
 411     if (ioctl(fd, SNDCTL_DSP_GETBLKSIZE, &frag_size) < 0) {
 412         pa_log(__FILE__": SNDCTL_DSP_GETBLKSIZE: %s", pa_cstrerror(errno));
 413         goto fail;
 414     }
 415     assert(frag_size);
 416     in_frag_size = out_frag_size = frag_size;
 417
 418     u = pa_xmalloc(sizeof(struct userdata));
 419     u->core = c;
 420     u->use_getospace = u->use_getispace = 0;
 421
 422     if (ioctl(fd, SNDCTL_DSP_GETISPACE, &info) >= 0) {
 423         pa_log_info(__FILE__": input -- %u fragments of size %u.", info.fragstotal, info.fragsize);
 424         in_frag_size = info.fragsize;
 425         u->use_getispace = 1;
 426     }
 427
 428     if (ioctl(fd, SNDCTL_DSP_GETOSPACE, &info) >= 0) {
 429         pa_log_info(__FILE__": output -- %u fragments of size %u.", info.fragstotal, info.fragsize);
 430         out_frag_size = info.fragsize;
 431         u->use_getospace = 1;
 432     }
 433
 434     if (mode != O_WRONLY) {
 435         if ((name = pa_modargs_get_value(ma, "source_name", NULL)))
 436             namereg_fail = 1;
 437         else {
 438             name = name_buf = pa_sprintf_malloc("oss_input.%s", pa_path_get_filename(p));
 439             namereg_fail = 0;
 440         }
 441
 442         if (!(u->source = pa_source_new(c, __FILE__, name, namereg_fail, &ss, &map)))
 443             goto fail;
 444
 445         u->source->userdata = u;
 446         u->source->notify = source_notify_cb;
 447         u->source->get_latency = source_get_latency_cb;
 448         u->source->get_hw_volume = source_get_hw_volume;
 449         u->source->set_hw_volume = source_set_hw_volume;
 450         pa_source_set_owner(u->source, m);
 451         pa_source_set_description(u->source, t = pa_sprintf_malloc("OSS PCM on %s%s%s%s",
 452                                                                  p,
 453                                                                  hwdesc[0] ? " (" : "",
 454                                                                  hwdesc[0] ? hwdesc : "",
 455                                                                  hwdesc[0] ? ")" : ""));
 456         pa_xfree(t);
 457         u->source->is_hardware = 1;
 458     } else
 459         u->source = NULL;
 460
 461     pa_xfree(name_buf);
 462     name_buf = NULL;
 463
 464     if (mode != O_RDONLY) {
 465         if ((name = pa_modargs_get_value(ma, "sink_name", NULL)))
 466             namereg_fail = 1;
 467         else {
 468             name = name_buf = pa_sprintf_malloc("oss_output.%s", pa_path_get_filename(p));
 469             namereg_fail = 0;
 470         }
 471
 472         if (!(u->sink = pa_sink_new(c, __FILE__, name, namereg_fail, &ss, &map)))
 473             goto fail;
 474
 475         u->sink->get_latency = sink_get_latency_cb;
 476         u->sink->get_hw_volume = sink_get_hw_volume;
 477         u->sink->set_hw_volume = sink_set_hw_volume;
 478         u->sink->userdata = u;
 479         pa_sink_set_owner(u->sink, m);
 480         pa_sink_set_description(u->sink, t = pa_sprintf_malloc("OSS PCM on %s%s%s%s",
 481                                                            p,
 482                                                            hwdesc[0] ? " (" : "",
 483                                                            hwdesc[0] ? hwdesc : "",
 484                                                            hwdesc[0] ? ")" : ""));
 485         pa_xfree(t);
 486         u->sink->is_hardware = 1;
 487     } else
 488         u->sink = NULL;
 489
 490     pa_xfree(name_buf);
 491     name_buf = NULL;
 492
 493     assert(u->source || u->sink);
 494
 495     u->io = pa_iochannel_new(c->mainloop, u->source ? fd : -1, u->sink ? fd : -1);
 496     assert(u->io);
 497     pa_iochannel_set_callback(u->io, io_callback, u);
 498     u->fd = fd;
 499
 500     u->memchunk.memblock = NULL;
 501     u->memchunk.length = 0;
 502     u->sample_size = pa_frame_size(&ss);
 503
 504     u->out_fragment_size = out_frag_size;
 505     u->in_fragment_size = in_frag_size;
 506     u->silence.memblock = pa_memblock_new(u->silence.length = u->out_fragment_size, u->core->memblock_stat);
 507     assert(u->silence.memblock);
 508     pa_silence_memblock(u->silence.memblock, &ss);
 509     u->silence.index = 0;
 510
 511     u->module = m;
 512     m->userdata = u;
 513
 514     pa_modargs_free(ma);
 515
 516     /*
 517      * Some crappy drivers do not start the recording until we read something.
 518      * Without this snippet, poll will never register the fd as ready.
 519      */
 520     if (u->source) {
 521         char *buf = pa_xnew(char, u->sample_size);
 522         pa_read(u->fd, buf, u->sample_size, NULL);
 523         pa_xfree(buf);
 524     }
 525
 526     /* Read mixer settings */
 527     if (u->source)
 528         source_get_hw_volume(u->source);
 529     if (u->sink)
 530         sink_get_hw_volume(u->sink);
 531
 532     return 0;
 533
 534 fail:
 535     if (fd >= 0)
 536         close(fd);
 537
 538     if (ma)
 539         pa_modargs_free(ma);
 540
 541     pa_xfree(name_buf);
 542
 543     return -1;
 544 }
 545
 546 void pa__done(pa_core *c, pa_module*m) {
 547     struct userdata *u;
 548
 549     assert(c);
 550     assert(m);
 551
 552     if (!(u = m->userdata))
 553         return;
 554
 555     clear_up(u);
 556
 557     if (u->memchunk.memblock)
 558         pa_memblock_unref(u->memchunk.memblock);
 559     if (u->silence.memblock)
 560         pa_memblock_unref(u->silence.memblock);
 561
 562     pa_xfree(u);
 563 }