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