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