code.delx.au - pulseaudio/blob - src/modules/module-detect.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 <stdio.h>
  27 #include <assert.h>
  28 #include <unistd.h>
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <errno.h>
  32 #include <stdlib.h>
  33 #include <sys/types.h>
  34 #include <sys/stat.h>
  35
  36 #include <pulse/xmalloc.h>
  37
  38 #include <pulsecore/core-error.h>
  39 #include <pulsecore/module.h>
  40 #include <pulsecore/modargs.h>
  41 #include <pulsecore/log.h>
  42 #include <pulsecore/core-util.h>
  43
  44 #include "module-detect-symdef.h"
  45
  46 PA_MODULE_AUTHOR("Lennart Poettering")
  47 PA_MODULE_DESCRIPTION("Detect available audio hardware and load matching drivers")
  48 PA_MODULE_VERSION(PACKAGE_VERSION)
  49 PA_MODULE_USAGE("just-one=<boolean>")
  50
  51 #ifdef HAVE_ALSA
  52
  53 static int detect_alsa(pa_core *c, int just_one) {
  54     FILE *f;
  55     int n = 0, n_sink = 0, n_source = 0;
  56
  57     if (!(f = fopen("/proc/asound/devices", "r"))) {
  58
  59         if (errno != ENOENT)
  60             pa_log_error(__FILE__": open(\"/proc/asound/devices\") failed: %s", pa_cstrerror(errno));
  61
  62         return -1;
  63     }
  64
  65     while (!feof(f)) {
  66         char line[64], args[64];
  67         unsigned device, subdevice;
  68         int is_sink;
  69
  70         if (!fgets(line, sizeof(line), f))
  71             break;
  72
  73         line[strcspn(line, "\r\n")] = 0;
  74
  75         if (pa_endswith(line, "digital audio playback"))
  76             is_sink = 1;
  77         else if (pa_endswith(line, "digital audio capture"))
  78             is_sink = 0;
  79         else
  80             continue;
  81
  82         if (just_one && is_sink && n_sink >= 1)
  83             continue;
  84
  85         if (just_one && !is_sink && n_source >= 1)
  86             continue;
  87
  88         if (sscanf(line, " %*i: [%u- %u]: ", &device, &subdevice) != 2)
  89             continue;
  90
  91         /* Only one sink per device */
  92         if (subdevice != 0)
  93             continue;
  94
  95         snprintf(args, sizeof(args), "device=hw:%u", device);
  96         if (!pa_module_load(c, is_sink ? "module-alsa-sink" : "module-alsa-source", args))
  97             continue;
  98
  99         n++;
 100
 101         if (is_sink)
 102             n_sink++;
 103         else
 104             n_source++;
 105     }
 106
 107     fclose(f);
 108
 109     return n;
 110 }
 111 #endif
 112
 113 #ifdef HAVE_OSS
 114 static int detect_oss(pa_core *c, int just_one) {
 115     FILE *f;
 116     int n = 0, b = 0;
 117
 118     if (!(f = fopen("/dev/sndstat", "r")) &&
 119         !(f = fopen("/proc/sndstat", "r")) &&
 120         !(f = fopen("/proc/asound/oss/sndstat", "r"))) {
 121
 122         if (errno != ENOENT)
 123             pa_log_error(__FILE__": failed to open OSS sndstat device: %s", pa_cstrerror(errno));
 124
 125         return -1;
 126     }
 127
 128     while (!feof(f)) {
 129         char line[64], args[64];
 130         unsigned device;
 131
 132         if (!fgets(line, sizeof(line), f))
 133             break;
 134
 135         line[strcspn(line, "\r\n")] = 0;
 136
 137         if (!b) {
 138              b = strcmp(line, "Audio devices:") == 0 || strcmp(line, "Installed devices:") == 0;
 139             continue;
 140         }
 141
 142         if (line[0] == 0)
 143             break;
 144
 145         if (sscanf(line, "%u: ", &device) == 1) {
 146             if (device == 0)
 147                 snprintf(args, sizeof(args), "device=/dev/dsp");
 148             else
 149                 snprintf(args, sizeof(args), "device=/dev/dsp%u", device);
 150
 151             if (!pa_module_load(c, "module-oss", args))
 152                 continue;
 153
 154         } else if (sscanf(line, "pcm%u: ", &device) == 1) {
 155             /* FreeBSD support, the devices are named /dev/dsp0.0, dsp0.1 and so on */
 156             snprintf(args, sizeof(args), "device=/dev/dsp%u.0", device);
 157
 158             if (!pa_module_load(c, "module-oss", args))
 159                 continue;
 160         }
 161
 162         n++;
 163
 164         if (just_one)
 165             break;
 166     }
 167
 168     fclose(f);
 169     return n;
 170 }
 171 #endif
 172
 173 #ifdef HAVE_SOLARIS
 174 static int detect_solaris(pa_core *c, int just_one) {
 175     struct stat s;
 176     const char *dev;
 177     char args[64];
 178
 179     dev = getenv("AUDIODEV");
 180     if (!dev)
 181         dev = "/dev/audio";
 182
 183     if (stat(dev, &s) < 0) {
 184         if (errno != ENOENT)
 185             pa_log_error(__FILE__": failed to open device %s: %s", dev, pa_cstrerror(errno));
 186         return -1;
 187     }
 188
 189     if (!S_ISCHR(s.st_mode))
 190         return 0;
 191
 192     snprintf(args, sizeof(args), "device=%s", dev);
 193
 194     if (!pa_module_load(c, "module-solaris", args))
 195         return 0;
 196
 197     return 1;
 198 }
 199 #endif
 200
 201 #ifdef OS_IS_WIN32
 202 static int detect_waveout(pa_core *c, int just_one) {
 203     /*
 204      * FIXME: No point in enumerating devices until the plugin supports
 205      * selecting anything but the first.
 206      */
 207     if (!pa_module_load(c, "module-waveout", ""))
 208         return 0;
 209
 210     return 1;
 211 }
 212 #endif
 213
 214 int pa__init(pa_core *c, pa_module*m) {
 215     int just_one = 0, n = 0;
 216     pa_modargs *ma;
 217
 218     static const char* const valid_modargs[] = {
 219         "just-one",
 220         NULL
 221     };
 222
 223     assert(c);
 224     assert(m);
 225
 226     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 227         pa_log(__FILE__": Failed to parse module arguments");
 228         goto fail;
 229     }
 230
 231     if (pa_modargs_get_value_boolean(ma, "just-one", &just_one) < 0) {
 232         pa_log(__FILE__": just_one= expects a boolean argument.");
 233         goto fail;
 234     }
 235
 236 #if HAVE_ALSA
 237     if ((n = detect_alsa(c, just_one)) <= 0)
 238 #endif
 239 #if HAVE_OSS
 240     if ((n = detect_oss(c, just_one)) <= 0)
 241 #endif
 242 #if HAVE_SOLARIS
 243     if ((n = detect_solaris(c, just_one)) <= 0)
 244 #endif
 245 #if OS_IS_WIN32
 246     if ((n = detect_waveout(c, just_one)) <= 0)
 247 #endif
 248     {
 249         pa_log_warn(__FILE__": failed to detect any sound hardware.");
 250         goto fail;
 251     }
 252
 253     pa_log_info(__FILE__": loaded %i modules.", n);
 254
 255     /* We were successful and can unload ourselves now. */
 256     pa_module_unload_request(m);
 257
 258     pa_modargs_free(ma);
 259
 260     return 0;
 261
 262 fail:
 263     if (ma)
 264         pa_modargs_free(ma);
 265
 266     return -1;
 267 }
 268
 269
 270 void pa__done(PA_GCC_UNUSED pa_core *c, PA_GCC_UNUSED pa_module*m) {
 271     /* NOP */
 272 }
 273