code.delx.au - pulseaudio/blob - polyp/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 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 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 "iochannel.h"
  39 #include "sink.h"
  40 #include "source.h"
  41 #include "module.h"
  42 #include "oss-util.h"
  43 #include "sample-util.h"
  44 #include "util.h"
  45 #include "modargs.h"
  46 #include "xmalloc.h"
  47 #include "log.h"
  48
  49 PA_MODULE_AUTHOR("Lennart Poettering")
  50 PA_MODULE_DESCRIPTION("OSS Sink/Source")
  51 PA_MODULE_VERSION(PACKAGE_VERSION)
  52
  53 struct userdata {
  54     struct pa_sink *sink;
  55     struct pa_source *source;
  56     struct pa_iochannel *io;
  57     struct pa_core *core;
  58
  59     struct pa_memchunk memchunk, silence;
  60
  61     uint32_t in_fragment_size, out_fragment_size, sample_size;
  62     int use_getospace, use_getispace;
  63
  64     int fd;
  65     struct pa_module *module;
  66 };
  67
  68 static const char* const valid_modargs[] = {
  69     "sink_name",
  70     "source_name",
  71     "device",
  72     "record",
  73     "playback",
  74     "fragments",
  75     "fragment_size",
  76     "format",
  77     "rate",
  78     "channels",
  79     NULL
  80 };
  81
  82 #define DEFAULT_SINK_NAME "oss_output"
  83 #define DEFAULT_SOURCE_NAME "oss_input"
  84 #define DEFAULT_DEVICE "/dev/dsp"
  85
  86 static void update_usage(struct userdata *u) {
  87    pa_module_set_used(u->module,
  88                       (u->sink ? pa_idxset_ncontents(u->sink->inputs) : 0) +
  89                       (u->sink ? pa_idxset_ncontents(u->sink->monitor_source->outputs) : 0) +
  90                       (u->source ? pa_idxset_ncontents(u->source->outputs) : 0));
  91 }
  92
  93 static void do_write(struct userdata *u) {
  94     struct pa_memchunk *memchunk;
  95     ssize_t r;
  96     size_t l;
  97     int loop = 0;
  98
  99     assert(u);
 100
 101     if (!u->sink || !pa_iochannel_is_writable(u->io))
 102         return;
 103
 104     update_usage(u);
 105
 106     l = u->out_fragment_size;
 107
 108     if (u->use_getospace) {
 109         audio_buf_info info;
 110
 111         if (ioctl(u->fd, SNDCTL_DSP_GETOSPACE, &info) < 0)
 112             u->use_getospace = 0;
 113         else {
 114             if (info.bytes/l > 0) {
 115                 l = (info.bytes/l)*l;
 116                 loop = 1;
 117             }
 118         }
 119     }
 120
 121     do {
 122         memchunk = &u->memchunk;
 123
 124         if (!memchunk->length)
 125             if (pa_sink_render(u->sink, l, memchunk) < 0)
 126                 memchunk = &u->silence;
 127
 128         assert(memchunk->memblock);
 129         assert(memchunk->memblock->data);
 130         assert(memchunk->length);
 131
 132         if ((r = pa_iochannel_write(u->io, (uint8_t*) memchunk->memblock->data + memchunk->index, memchunk->length)) < 0) {
 133             pa_log(__FILE__": write() failed: %s\n", strerror(errno));
 134             break;
 135         }
 136
 137         if (memchunk == &u->silence)
 138             assert(r % u->sample_size == 0);
 139         else {
 140             u->memchunk.index += r;
 141             u->memchunk.length -= r;
 142
 143             if (u->memchunk.length <= 0) {
 144                 pa_memblock_unref(u->memchunk.memblock);
 145                 u->memchunk.memblock = NULL;
 146             }
 147         }
 148
 149         l = l > (size_t) r ? l - r : 0;
 150     } while (loop && l > 0);
 151 }
 152
 153 static void do_read(struct userdata *u) {
 154     struct pa_memchunk memchunk;
 155     ssize_t r;
 156     size_t l;
 157     int loop = 0;
 158     assert(u);
 159
 160     if (!u->source || !pa_iochannel_is_readable(u->io))
 161         return;
 162
 163     update_usage(u);
 164
 165     l = u->in_fragment_size;
 166
 167     if (u->use_getispace) {
 168         audio_buf_info info;
 169
 170         if (ioctl(u->fd, SNDCTL_DSP_GETISPACE, &info) < 0)
 171             u->use_getispace = 0;
 172         else {
 173             if (info.bytes/l > 0) {
 174                 l = (info.bytes/l)*l;
 175                 loop = 1;
 176             }
 177         }
 178     }
 179
 180     do {
 181         memchunk.memblock = pa_memblock_new(l, u->core->memblock_stat);
 182         assert(memchunk.memblock);
 183         if ((r = pa_iochannel_read(u->io, memchunk.memblock->data, memchunk.memblock->length)) < 0) {
 184             pa_memblock_unref(memchunk.memblock);
 185             if (errno != EAGAIN)
 186                 pa_log(__FILE__": read() failed: %s\n", strerror(errno));
 187             break;
 188         }
 189
 190         assert(r <= (ssize_t) memchunk.memblock->length);
 191         memchunk.length = memchunk.memblock->length = r;
 192         memchunk.index = 0;
 193
 194         pa_source_post(u->source, &memchunk);
 195         pa_memblock_unref(memchunk.memblock);
 196
 197         l = l > (size_t) r ? l - r : 0;
 198     } while (loop && l > 0);
 199 }
 200
 201 static void io_callback(struct pa_iochannel *io, void*userdata) {
 202     struct userdata *u = userdata;
 203     assert(u);
 204     do_write(u);
 205     do_read(u);
 206 }
 207
 208 static pa_usec_t sink_get_latency_cb(struct pa_sink *s) {
 209     pa_usec_t r = 0;
 210     int arg;
 211     struct userdata *u = s->userdata;
 212     assert(s && u && u->sink);
 213
 214     if (ioctl(u->fd, SNDCTL_DSP_GETODELAY, &arg) < 0) {
 215         pa_log(__FILE__": device doesn't support SNDCTL_DSP_GETODELAY.\n");
 216         s->get_latency = NULL;
 217         return 0;
 218     }
 219
 220     r += pa_bytes_to_usec(arg, &s->sample_spec);
 221
 222     if (u->memchunk.memblock)
 223         r += pa_bytes_to_usec(u->memchunk.length, &s->sample_spec);
 224
 225     return r;
 226 }
 227
 228 static pa_usec_t source_get_latency_cb(struct pa_source *s) {
 229     struct userdata *u = s->userdata;
 230     audio_buf_info info;
 231     assert(s && u && u->sink);
 232
 233     if (!u->use_getispace)
 234         return 0;
 235
 236     if (ioctl(u->fd, SNDCTL_DSP_GETISPACE, &info) < 0) {
 237         u->use_getispace = 0;
 238         return 0;
 239     }
 240
 241     if (info.bytes <= 0)
 242         return 0;
 243
 244     return pa_bytes_to_usec(info.bytes, &s->sample_spec);
 245 }
 246
 247 int pa__init(struct pa_core *c, struct pa_module*m) {
 248     struct audio_buf_info info;
 249     struct userdata *u = NULL;
 250     const char *p;
 251     int fd = -1;
 252     int nfrags, frag_size, in_frag_size, out_frag_size;
 253     int mode;
 254     int record = 1, playback = 1;
 255     struct pa_sample_spec ss;
 256     struct pa_modargs *ma = NULL;
 257     assert(c && m);
 258
 259     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 260         pa_log(__FILE__": failed to parse module arguments.\n");
 261         goto fail;
 262     }
 263
 264     if (pa_modargs_get_value_boolean(ma, "record", &record) < 0 || pa_modargs_get_value_boolean(ma, "playback", &playback) < 0) {
 265         pa_log(__FILE__": record= and playback= expect numeric argument.\n");
 266         goto fail;
 267     }
 268
 269     if (!playback && !record) {
 270         pa_log(__FILE__": neither playback nor record enabled for device.\n");
 271         goto fail;
 272     }
 273
 274     mode = (playback&&record) ? O_RDWR : (playback ? O_WRONLY : (record ? O_RDONLY : 0));
 275
 276     nfrags = 12;
 277     frag_size = 1024;
 278     if (pa_modargs_get_value_s32(ma, "fragments", &nfrags) < 0 || pa_modargs_get_value_s32(ma, "fragment_size", &frag_size) < 0) {
 279         pa_log(__FILE__": failed to parse fragments arguments\n");
 280         goto fail;
 281     }
 282
 283     ss = c->default_sample_spec;
 284     if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
 285         pa_log(__FILE__": failed to parse sample specification\n");
 286         goto fail;
 287     }
 288
 289     if ((fd = pa_oss_open(p = pa_modargs_get_value(ma, "device", DEFAULT_DEVICE), &mode, NULL)) < 0)
 290         goto fail;
 291
 292     pa_log(__FILE__": device opened in %s mode.\n", mode == O_WRONLY ? "O_WRONLY" : (mode == O_RDONLY ? "O_RDONLY" : "O_RDWR"));
 293
 294
 295     if (nfrags >= 2 && frag_size >= 1)
 296         if (pa_oss_set_fragments(fd, nfrags, frag_size) < 0)
 297             goto fail;
 298
 299     if (pa_oss_auto_format(fd, &ss) < 0)
 300         goto fail;
 301
 302     if (ioctl(fd, SNDCTL_DSP_GETBLKSIZE, &frag_size) < 0) {
 303         pa_log(__FILE__": SNDCTL_DSP_GETBLKSIZE: %s\n", strerror(errno));
 304         goto fail;
 305     }
 306     assert(frag_size);
 307     in_frag_size = out_frag_size = frag_size;
 308
 309     u = pa_xmalloc(sizeof(struct userdata));
 310     u->core = c;
 311     u->use_getospace = u->use_getispace = 0;
 312
 313     if (ioctl(fd, SNDCTL_DSP_GETISPACE, &info) >= 0) {
 314         pa_log(__FILE__": input -- %u fragments of size %u.\n", info.fragstotal, info.fragsize);
 315         in_frag_size = info.fragsize;
 316         u->use_getispace = 1;
 317     }
 318
 319     if (ioctl(fd, SNDCTL_DSP_GETOSPACE, &info) >= 0) {
 320         pa_log(__FILE__": output -- %u fragments of size %u.\n", info.fragstotal, info.fragsize);
 321         out_frag_size = info.fragsize;
 322         u->use_getospace = 1;
 323     }
 324
 325     if (mode != O_WRONLY) {
 326         u->source = pa_source_new(c, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss);
 327         assert(u->source);
 328         u->source->userdata = u;
 329         u->source->get_latency = source_get_latency_cb;
 330         pa_source_set_owner(u->source, m);
 331         u->source->description = pa_sprintf_malloc("Open Sound System PCM on '%s'", p);
 332     } else
 333         u->source = NULL;
 334
 335     if (mode != O_RDONLY) {
 336         u->sink = pa_sink_new(c, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss);
 337         assert(u->sink);
 338         u->sink->get_latency = sink_get_latency_cb;
 339         u->sink->userdata = u;
 340         pa_sink_set_owner(u->sink, m);
 341         u->sink->description = pa_sprintf_malloc("Open Sound System PCM on '%s'", p);
 342     } else
 343         u->sink = NULL;
 344
 345     assert(u->source || u->sink);
 346
 347     u->io = pa_iochannel_new(c->mainloop, u->source ? fd : -1, u->sink ? fd : 0);
 348     assert(u->io);
 349     pa_iochannel_set_callback(u->io, io_callback, u);
 350     u->fd = fd;
 351
 352     u->memchunk.memblock = NULL;
 353     u->memchunk.length = 0;
 354     u->sample_size = pa_frame_size(&ss);
 355
 356     u->out_fragment_size = out_frag_size;
 357     u->in_fragment_size = in_frag_size;
 358     u->silence.memblock = pa_memblock_new(u->silence.length = u->out_fragment_size, u->core->memblock_stat);
 359     assert(u->silence.memblock);
 360     pa_silence_memblock(u->silence.memblock, &ss);
 361     u->silence.index = 0;
 362
 363     u->module = m;
 364     m->userdata = u;
 365
 366     pa_modargs_free(ma);
 367
 368     return 0;
 369
 370 fail:
 371     if (fd >= 0)
 372         close(fd);
 373
 374     if (ma)
 375         pa_modargs_free(ma);
 376
 377     return -1;
 378 }
 379
 380 void pa__done(struct pa_core *c, struct pa_module*m) {
 381     struct userdata *u;
 382     assert(c && m);
 383
 384     if (!(u = m->userdata))
 385         return;
 386
 387     if (u->memchunk.memblock)
 388         pa_memblock_unref(u->memchunk.memblock);
 389     if (u->silence.memblock)
 390         pa_memblock_unref(u->silence.memblock);
 391
 392     if (u->sink) {
 393         pa_sink_disconnect(u->sink);
 394         pa_sink_unref(u->sink);
 395     }
 396
 397     if (u->source) {
 398         pa_source_disconnect(u->source);
 399         pa_source_unref(u->source);
 400     }
 401
 402     pa_iochannel_free(u->io);
 403     pa_xfree(u);
 404 }