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
  63     int fd;
  64     struct pa_module *module;
  65 };
  66
  67 static const char* const valid_modargs[] = {
  68     "sink_name",
  69     "source_name",
  70     "device",
  71     "record",
  72     "playback",
  73     "fragments",
  74     "fragment_size",
  75     "format",
  76     "rate",
  77     "channels",
  78     NULL
  79 };
  80
  81 #define DEFAULT_SINK_NAME "oss_output"
  82 #define DEFAULT_SOURCE_NAME "oss_input"
  83 #define DEFAULT_DEVICE "/dev/dsp"
  84
  85 static void update_usage(struct userdata *u) {
  86    pa_module_set_used(u->module,
  87                       (u->sink ? pa_idxset_ncontents(u->sink->inputs) : 0) +
  88                       (u->sink ? pa_idxset_ncontents(u->sink->monitor_source->outputs) : 0) +
  89                       (u->source ? pa_idxset_ncontents(u->source->outputs) : 0));
  90 }
  91
  92 static void do_write(struct userdata *u) {
  93     struct pa_memchunk *memchunk;
  94     ssize_t r;
  95     assert(u);
  96
  97     if (!u->sink || !pa_iochannel_is_writable(u->io))
  98         return;
  99
 100     update_usage(u);
 101
 102     memchunk = &u->memchunk;
 103
 104     if (!memchunk->length)
 105         if (pa_sink_render(u->sink, u->out_fragment_size, memchunk) < 0)
 106             memchunk = &u->silence;
 107
 108     assert(memchunk->memblock);
 109     assert(memchunk->memblock->data);
 110     assert(memchunk->length);
 111
 112     if ((r = pa_iochannel_write(u->io, (uint8_t*) memchunk->memblock->data + memchunk->index, memchunk->length)) < 0) {
 113         pa_log(__FILE__": write() failed: %s\n", strerror(errno));
 114         return;
 115     }
 116
 117     if (memchunk == &u->silence)
 118         assert(r % u->sample_size == 0);
 119     else {
 120         u->memchunk.index += r;
 121         u->memchunk.length -= r;
 122
 123         if (u->memchunk.length <= 0) {
 124             pa_memblock_unref(u->memchunk.memblock);
 125             u->memchunk.memblock = NULL;
 126         }
 127     }
 128 }
 129
 130 static void do_read(struct userdata *u) {
 131     struct pa_memchunk memchunk;
 132     ssize_t r;
 133     assert(u);
 134
 135     if (!u->source || !pa_iochannel_is_readable(u->io))
 136         return;
 137
 138     update_usage(u);
 139
 140     memchunk.memblock = pa_memblock_new(u->in_fragment_size, u->core->memblock_stat);
 141     assert(memchunk.memblock);
 142     if ((r = pa_iochannel_read(u->io, memchunk.memblock->data, memchunk.memblock->length)) < 0) {
 143         pa_memblock_unref(memchunk.memblock);
 144         if (errno != EAGAIN)
 145             pa_log(__FILE__": read() failed: %s\n", strerror(errno));
 146         return;
 147     }
 148
 149     assert(r <= (ssize_t) memchunk.memblock->length);
 150     memchunk.length = memchunk.memblock->length = r;
 151     memchunk.index = 0;
 152
 153     pa_source_post(u->source, &memchunk);
 154     pa_memblock_unref(memchunk.memblock);
 155 }
 156
 157 static void io_callback(struct pa_iochannel *io, void*userdata) {
 158     struct userdata *u = userdata;
 159     assert(u);
 160     do_write(u);
 161     do_read(u);
 162 }
 163
 164 static pa_usec_t sink_get_latency_cb(struct pa_sink *s) {
 165     pa_usec_t r = 0;
 166     int arg;
 167     struct userdata *u = s->userdata;
 168     assert(s && u && u->sink);
 169
 170     if (ioctl(u->fd, SNDCTL_DSP_GETODELAY, &arg) < 0) {
 171         pa_log(__FILE__": device doesn't support SNDCTL_DSP_GETODELAY.\n");
 172         s->get_latency = NULL;
 173         return 0;
 174     }
 175
 176     r += pa_bytes_to_usec(arg, &s->sample_spec);
 177
 178     if (u->memchunk.memblock)
 179         r += pa_bytes_to_usec(u->memchunk.length, &s->sample_spec);
 180
 181     return r;
 182 }
 183
 184 int pa__init(struct pa_core *c, struct pa_module*m) {
 185     struct audio_buf_info info;
 186     struct userdata *u = NULL;
 187     const char *p;
 188     int fd = -1;
 189     int nfrags, frag_size, in_frag_size, out_frag_size;
 190     int mode;
 191     int record = 1, playback = 1;
 192     struct pa_sample_spec ss;
 193     struct pa_modargs *ma = NULL;
 194     assert(c && m);
 195
 196     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 197         pa_log(__FILE__": failed to parse module arguments.\n");
 198         goto fail;
 199     }
 200
 201     if (pa_modargs_get_value_boolean(ma, "record", &record) < 0 || pa_modargs_get_value_boolean(ma, "playback", &playback) < 0) {
 202         pa_log(__FILE__": record= and playback= expect numeric argument.\n");
 203         goto fail;
 204     }
 205
 206     if (!playback && !record) {
 207         pa_log(__FILE__": neither playback nor record enabled for device.\n");
 208         goto fail;
 209     }
 210
 211     mode = (playback&&record) ? O_RDWR : (playback ? O_WRONLY : (record ? O_RDONLY : 0));
 212
 213     nfrags = 12;
 214     frag_size = 1024;
 215     if (pa_modargs_get_value_s32(ma, "fragments", &nfrags) < 0 || pa_modargs_get_value_s32(ma, "fragment_size", &frag_size) < 0) {
 216         pa_log(__FILE__": failed to parse fragments arguments\n");
 217         goto fail;
 218     }
 219
 220     ss = c->default_sample_spec;
 221     if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
 222         pa_log(__FILE__": failed to parse sample specification\n");
 223         goto fail;
 224     }
 225
 226     if ((fd = pa_oss_open(p = pa_modargs_get_value(ma, "device", DEFAULT_DEVICE), &mode, NULL)) < 0)
 227         goto fail;
 228
 229     pa_log(__FILE__": device opened in %s mode.\n", mode == O_WRONLY ? "O_WRONLY" : (mode == O_RDONLY ? "O_RDONLY" : "O_RDWR"));
 230
 231
 232     if (nfrags >= 2 && frag_size >= 1)
 233         if (pa_oss_set_fragments(fd, nfrags, frag_size) < 0)
 234             goto fail;
 235
 236     if (pa_oss_auto_format(fd, &ss) < 0)
 237         goto fail;
 238
 239     if (ioctl(fd, SNDCTL_DSP_GETBLKSIZE, &frag_size) < 0) {
 240         pa_log(__FILE__": SNDCTL_DSP_GETBLKSIZE: %s\n", strerror(errno));
 241         goto fail;
 242     }
 243     assert(frag_size);
 244     in_frag_size = out_frag_size = frag_size;
 245
 246     if (ioctl(fd, SNDCTL_DSP_GETISPACE, &info) >= 0) {
 247         pa_log(__FILE__": input -- %u fragments of size %u.\n", info.fragstotal, info.fragsize);
 248         in_frag_size = info.fragsize;
 249     }
 250
 251     if (ioctl(fd, SNDCTL_DSP_GETOSPACE, &info) >= 0) {
 252         pa_log(__FILE__": output -- %u fragments of size %u.\n", info.fragstotal, info.fragsize);
 253         out_frag_size = info.fragsize;
 254     }
 255
 256     u = pa_xmalloc(sizeof(struct userdata));
 257     u->core = c;
 258
 259     if (mode != O_WRONLY) {
 260         u->source = pa_source_new(c, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss);
 261         assert(u->source);
 262         u->source->userdata = u;
 263         pa_source_set_owner(u->source, m);
 264         u->source->description = pa_sprintf_malloc("Open Sound System PCM on '%s'", p);
 265     } else
 266         u->source = NULL;
 267
 268     if (mode != O_RDONLY) {
 269         u->sink = pa_sink_new(c, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss);
 270         assert(u->sink);
 271         u->sink->get_latency = sink_get_latency_cb;
 272         u->sink->userdata = u;
 273         pa_sink_set_owner(u->sink, m);
 274         u->sink->description = pa_sprintf_malloc("Open Sound System PCM on '%s'", p);
 275     } else
 276         u->sink = NULL;
 277
 278     assert(u->source || u->sink);
 279
 280     u->io = pa_iochannel_new(c->mainloop, u->source ? fd : -1, u->sink ? fd : 0);
 281     assert(u->io);
 282     pa_iochannel_set_callback(u->io, io_callback, u);
 283     u->fd = fd;
 284
 285     u->memchunk.memblock = NULL;
 286     u->memchunk.length = 0;
 287     u->sample_size = pa_frame_size(&ss);
 288
 289     u->out_fragment_size = out_frag_size;
 290     u->in_fragment_size = in_frag_size;
 291     u->silence.memblock = pa_memblock_new(u->silence.length = u->out_fragment_size, u->core->memblock_stat);
 292     assert(u->silence.memblock);
 293     pa_silence_memblock(u->silence.memblock, &ss);
 294     u->silence.index = 0;
 295
 296     u->module = m;
 297     m->userdata = u;
 298
 299     pa_modargs_free(ma);
 300
 301     return 0;
 302
 303 fail:
 304     if (fd >= 0)
 305         close(fd);
 306
 307     if (ma)
 308         pa_modargs_free(ma);
 309
 310     return -1;
 311 }
 312
 313 void pa__done(struct pa_core *c, struct pa_module*m) {
 314     struct userdata *u;
 315     assert(c && m);
 316
 317     if (!(u = m->userdata))
 318         return;
 319
 320     if (u->memchunk.memblock)
 321         pa_memblock_unref(u->memchunk.memblock);
 322     if (u->silence.memblock)
 323         pa_memblock_unref(u->silence.memblock);
 324
 325     if (u->sink)
 326         pa_sink_free(u->sink);
 327     if (u->source)
 328         pa_source_free(u->source);
 329
 330     pa_iochannel_free(u->io);
 331     pa_xfree(u);
 332 }