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