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("sink_name=<name for the sink> source_name=<name for the source> device=<OSS device> record=<enable source?> playback=<enable sink?> format=<sample format> channels=<number of channels> rate=<sample rate> fragments=<number of fragments> fragment_size=<fragment size>")
  55
  56 struct userdata {
  57     pa_sink *sink;
  58     pa_source *source;
  59     pa_iochannel *io;
  60     pa_core *core;
  61
  62     pa_memchunk memchunk, silence;
  63
  64     uint32_t in_fragment_size, out_fragment_size, sample_size;
  65     int use_getospace, use_getispace;
  66
  67     int fd;
  68     pa_module *module;
  69 };
  70
  71 static const char* const valid_modargs[] = {
  72     "sink_name",
  73     "source_name",
  74     "device",
  75     "record",
  76     "playback",
  77     "fragments",
  78     "fragment_size",
  79     "format",
  80     "rate",
  81     "channels",
  82     NULL
  83 };
  84
  85 #define DEFAULT_SINK_NAME "oss_output"
  86 #define DEFAULT_SOURCE_NAME "oss_input"
  87 #define DEFAULT_DEVICE "/dev/dsp"
  88
  89 static void update_usage(struct userdata *u) {
  90    pa_module_set_used(u->module,
  91                       (u->sink ? pa_idxset_size(u->sink->inputs) : 0) +
  92                       (u->sink ? pa_idxset_size(u->sink->monitor_source->outputs) : 0) +
  93                       (u->source ? pa_idxset_size(u->source->outputs) : 0));
  94 }
  95
  96 static void do_write(struct userdata *u) {
  97     pa_memchunk *memchunk;
  98     ssize_t r;
  99     size_t l;
 100     int loop = 0;
 101
 102     assert(u);
 103
 104     if (!u->sink || !pa_iochannel_is_writable(u->io))
 105         return;
 106
 107     update_usage(u);
 108
 109     l = u->out_fragment_size;
 110
 111     if (u->use_getospace) {
 112         audio_buf_info info;
 113
 114         if (ioctl(u->fd, SNDCTL_DSP_GETOSPACE, &info) < 0)
 115             u->use_getospace = 0;
 116         else {
 117             if (info.bytes/l > 0) {
 118                 l = (info.bytes/l)*l;
 119                 loop = 1;
 120             }
 121         }
 122     }
 123
 124     do {
 125         memchunk = &u->memchunk;
 126
 127         if (!memchunk->length)
 128             if (pa_sink_render(u->sink, l, memchunk) < 0)
 129                 memchunk = &u->silence;
 130
 131         assert(memchunk->memblock);
 132         assert(memchunk->memblock->data);
 133         assert(memchunk->length);
 134
 135         if ((r = pa_iochannel_write(u->io, (uint8_t*) memchunk->memblock->data + memchunk->index, memchunk->length)) < 0) {
 136             pa_log(__FILE__": write() failed: %s\n", strerror(errno));
 137             break;
 138         }
 139
 140         if (memchunk == &u->silence)
 141             assert(r % u->sample_size == 0);
 142         else {
 143             u->memchunk.index += r;
 144             u->memchunk.length -= r;
 145
 146             if (u->memchunk.length <= 0) {
 147                 pa_memblock_unref(u->memchunk.memblock);
 148                 u->memchunk.memblock = NULL;
 149             }
 150         }
 151
 152         l = l > (size_t) r ? l - r : 0;
 153     } while (loop && l > 0);
 154 }
 155
 156 static void do_read(struct userdata *u) {
 157     pa_memchunk memchunk;
 158     ssize_t r;
 159     size_t l;
 160     int loop = 0;
 161     assert(u);
 162
 163     if (!u->source || !pa_iochannel_is_readable(u->io) || !pa_idxset_size(u->source->outputs))
 164         return;
 165
 166     update_usage(u);
 167
 168     l = u->in_fragment_size;
 169
 170     if (u->use_getispace) {
 171         audio_buf_info info;
 172
 173         if (ioctl(u->fd, SNDCTL_DSP_GETISPACE, &info) < 0)
 174             u->use_getispace = 0;
 175         else {
 176             if (info.bytes/l > 0) {
 177                 l = (info.bytes/l)*l;
 178                 loop = 1;
 179             }
 180         }
 181     }
 182
 183     do {
 184         memchunk.memblock = pa_memblock_new(l, u->core->memblock_stat);
 185         assert(memchunk.memblock);
 186         if ((r = pa_iochannel_read(u->io, memchunk.memblock->data, memchunk.memblock->length)) < 0) {
 187             pa_memblock_unref(memchunk.memblock);
 188             if (errno != EAGAIN)
 189                 pa_log(__FILE__": read() failed: %s\n", strerror(errno));
 190             break;
 191         }
 192
 193         assert(r <= (ssize_t) memchunk.memblock->length);
 194         memchunk.length = memchunk.memblock->length = r;
 195         memchunk.index = 0;
 196
 197         pa_source_post(u->source, &memchunk);
 198         pa_memblock_unref(memchunk.memblock);
 199
 200         l = l > (size_t) r ? l - r : 0;
 201     } while (loop && l > 0);
 202 }
 203
 204 static void io_callback(PA_GCC_UNUSED pa_iochannel *io, void*userdata) {
 205     struct userdata *u = userdata;
 206     assert(u);
 207     do_write(u);
 208     do_read(u);
 209 }
 210
 211 static void source_notify_cb(pa_source *s) {
 212     struct userdata *u = s->userdata;
 213     assert(u);
 214     do_read(u);
 215 }
 216
 217 static pa_usec_t sink_get_latency_cb(pa_sink *s) {
 218     pa_usec_t r = 0;
 219     int arg;
 220     struct userdata *u = s->userdata;
 221     assert(s && u && u->sink);
 222
 223     if (ioctl(u->fd, SNDCTL_DSP_GETODELAY, &arg) < 0) {
 224         pa_log_info(__FILE__": device doesn't support SNDCTL_DSP_GETODELAY: %s\n", strerror(errno));
 225         s->get_latency = NULL;
 226         return 0;
 227     }
 228
 229     r += pa_bytes_to_usec(arg, &s->sample_spec);
 230
 231     if (u->memchunk.memblock)
 232         r += pa_bytes_to_usec(u->memchunk.length, &s->sample_spec);
 233
 234     return r;
 235 }
 236
 237 static pa_usec_t source_get_latency_cb(pa_source *s) {
 238     struct userdata *u = s->userdata;
 239     audio_buf_info info;
 240     assert(s && u && u->source);
 241
 242     if (!u->use_getispace)
 243         return 0;
 244
 245     if (ioctl(u->fd, SNDCTL_DSP_GETISPACE, &info) < 0) {
 246         u->use_getispace = 0;
 247         return 0;
 248     }
 249
 250     if (info.bytes <= 0)
 251         return 0;
 252
 253     return pa_bytes_to_usec(info.bytes, &s->sample_spec);
 254 }
 255
 256 static int sink_get_hw_volume(pa_sink *s) {
 257     struct userdata *u = s->userdata;
 258
 259     if (pa_oss_get_volume(u->fd, &s->sample_spec, &s->hw_volume) < 0) {
 260         pa_log_info(__FILE__": device doesn't support reading mixer settings: %s\n", strerror(errno));
 261         s->get_hw_volume = NULL;
 262         return -1;
 263     }
 264
 265     return 0;
 266 }
 267
 268 static int sink_set_hw_volume(pa_sink *s) {
 269     struct userdata *u = s->userdata;
 270
 271     if (pa_oss_set_volume(u->fd, &s->sample_spec, &s->hw_volume) < 0) {
 272         pa_log_info(__FILE__": device doesn't support writing mixer settings: %s\n", strerror(errno));
 273         s->set_hw_volume = NULL;
 274         return -1;
 275     }
 276
 277     return 0;
 278 }
 279
 280 int pa__init(pa_core *c, pa_module*m) {
 281     struct audio_buf_info info;
 282     struct userdata *u = NULL;
 283     const char *p;
 284     int fd = -1;
 285     int nfrags, frag_size, in_frag_size, out_frag_size;
 286     int mode;
 287     int record = 1, playback = 1;
 288     pa_sample_spec ss;
 289     pa_modargs *ma = NULL;
 290     char hwdesc[64];
 291
 292     assert(c);
 293     assert(m);
 294
 295     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 296         pa_log(__FILE__": failed to parse module arguments.\n");
 297         goto fail;
 298     }
 299
 300     if (pa_modargs_get_value_boolean(ma, "record", &record) < 0 || pa_modargs_get_value_boolean(ma, "playback", &playback) < 0) {
 301         pa_log(__FILE__": record= and playback= expect numeric argument.\n");
 302         goto fail;
 303     }
 304
 305     if (!playback && !record) {
 306         pa_log(__FILE__": neither playback nor record enabled for device.\n");
 307         goto fail;
 308     }
 309
 310     mode = (playback&&record) ? O_RDWR : (playback ? O_WRONLY : (record ? O_RDONLY : 0));
 311
 312     nfrags = 12;
 313     frag_size = 1024;
 314     if (pa_modargs_get_value_s32(ma, "fragments", &nfrags) < 0 || pa_modargs_get_value_s32(ma, "fragment_size", &frag_size) < 0) {
 315         pa_log(__FILE__": failed to parse fragments arguments\n");
 316         goto fail;
 317     }
 318
 319     ss = c->default_sample_spec;
 320     if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
 321         pa_log(__FILE__": failed to parse sample specification\n");
 322         goto fail;
 323     }
 324
 325     if ((fd = pa_oss_open(p = pa_modargs_get_value(ma, "device", DEFAULT_DEVICE), &mode, NULL)) < 0)
 326         goto fail;
 327
 328     if (pa_oss_get_hw_description(p, hwdesc, sizeof(hwdesc)) >= 0)
 329         pa_log_info(__FILE__": hardware name is '%s'.\n", hwdesc);
 330     else
 331         hwdesc[0] = 0;
 332
 333     pa_log_info(__FILE__": device opened in %s mode.\n", mode == O_WRONLY ? "O_WRONLY" : (mode == O_RDONLY ? "O_RDONLY" : "O_RDWR"));
 334
 335     if (nfrags >= 2 && frag_size >= 1)
 336         if (pa_oss_set_fragments(fd, nfrags, frag_size) < 0)
 337             goto fail;
 338
 339     if (pa_oss_auto_format(fd, &ss) < 0)
 340         goto fail;
 341
 342     if (ioctl(fd, SNDCTL_DSP_GETBLKSIZE, &frag_size) < 0) {
 343         pa_log(__FILE__": SNDCTL_DSP_GETBLKSIZE: %s\n", strerror(errno));
 344         goto fail;
 345     }
 346     assert(frag_size);
 347     in_frag_size = out_frag_size = frag_size;
 348
 349     u = pa_xmalloc(sizeof(struct userdata));
 350     u->core = c;
 351     u->use_getospace = u->use_getispace = 0;
 352
 353     if (ioctl(fd, SNDCTL_DSP_GETISPACE, &info) >= 0) {
 354         pa_log_info(__FILE__": input -- %u fragments of size %u.\n", info.fragstotal, info.fragsize);
 355         in_frag_size = info.fragsize;
 356         u->use_getispace = 1;
 357     }
 358
 359     if (ioctl(fd, SNDCTL_DSP_GETOSPACE, &info) >= 0) {
 360         pa_log_info(__FILE__": output -- %u fragments of size %u.\n", info.fragstotal, info.fragsize);
 361         out_frag_size = info.fragsize;
 362         u->use_getospace = 1;
 363     }
 364
 365     if (mode != O_WRONLY) {
 366         u->source = pa_source_new(c, __FILE__, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss, NULL);
 367         assert(u->source);
 368         u->source->userdata = u;
 369         u->source->notify = source_notify_cb;
 370         u->source->get_latency = source_get_latency_cb;
 371         pa_source_set_owner(u->source, m);
 372         u->source->description = pa_sprintf_malloc("Open Sound System PCM on '%s'%s%s%s",
 373                                                    p,
 374                                                    hwdesc[0] ? " (" : "",
 375                                                    hwdesc[0] ? hwdesc : "",
 376                                                    hwdesc[0] ? ")" : "");
 377     } else
 378         u->source = NULL;
 379
 380     if (mode != O_RDONLY) {
 381         u->sink = pa_sink_new(c, __FILE__, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss, NULL);
 382         assert(u->sink);
 383         u->sink->get_latency = sink_get_latency_cb;
 384         u->sink->get_hw_volume = sink_get_hw_volume;
 385         u->sink->set_hw_volume = sink_set_hw_volume;
 386         u->sink->userdata = u;
 387         pa_sink_set_owner(u->sink, m);
 388         u->sink->description = pa_sprintf_malloc("Open Sound System PCM on '%s'%s%s%s",
 389                                                  p,
 390                                                  hwdesc[0] ? " (" : "",
 391                                                  hwdesc[0] ? hwdesc : "",
 392                                                  hwdesc[0] ? ")" : "");
 393     } else
 394         u->sink = NULL;
 395
 396     assert(u->source || u->sink);
 397
 398     u->io = pa_iochannel_new(c->mainloop, u->source ? fd : -1, u->sink ? fd : -1);
 399     assert(u->io);
 400     pa_iochannel_set_callback(u->io, io_callback, u);
 401     u->fd = fd;
 402
 403     u->memchunk.memblock = NULL;
 404     u->memchunk.length = 0;
 405     u->sample_size = pa_frame_size(&ss);
 406
 407     u->out_fragment_size = out_frag_size;
 408     u->in_fragment_size = in_frag_size;
 409     u->silence.memblock = pa_memblock_new(u->silence.length = u->out_fragment_size, u->core->memblock_stat);
 410     assert(u->silence.memblock);
 411     pa_silence_memblock(u->silence.memblock, &ss);
 412     u->silence.index = 0;
 413
 414     u->module = m;
 415     m->userdata = u;
 416
 417     pa_modargs_free(ma);
 418
 419     /*
 420      * Some crappy drivers do not start the recording until we read something.
 421      * Without this snippet, poll will never register the fd as ready.
 422      */
 423     if (u->source) {
 424         char buf[u->sample_size];
 425         read(u->fd, buf, u->sample_size);
 426     }
 427
 428     /* Read mixer settings */
 429     if (u->sink)
 430         sink_get_hw_volume(u->sink);
 431
 432     return 0;
 433
 434 fail:
 435     if (fd >= 0)
 436         close(fd);
 437
 438     if (ma)
 439         pa_modargs_free(ma);
 440
 441     return -1;
 442 }
 443
 444 void pa__done(pa_core *c, pa_module*m) {
 445     struct userdata *u;
 446     assert(c && m);
 447
 448     if (!(u = m->userdata))
 449         return;
 450
 451     if (u->memchunk.memblock)
 452         pa_memblock_unref(u->memchunk.memblock);
 453     if (u->silence.memblock)
 454         pa_memblock_unref(u->silence.memblock);
 455
 456     if (u->sink) {
 457         pa_sink_disconnect(u->sink);
 458         pa_sink_unref(u->sink);
 459     }
 460
 461     if (u->source) {
 462         pa_source_disconnect(u->source);
 463         pa_source_unref(u->source);
 464     }
 465
 466     pa_iochannel_free(u->io);
 467     pa_xfree(u);
 468 }