code.delx.au - pulseaudio/blob - src/modules/module-detect.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 <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 <polyp/xmalloc.h>
  37
  38 #include <polypcore/core-error.h>
  39 #include <polypcore/module.h>
  40 #include <polypcore/modargs.h>
  41 #include <polypcore/log.h>
  42 #include <polypcore/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,0", 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;
 139             continue;
 140         }
 141
 142         if (line[0] == 0)
 143             break;
 144
 145         if (sscanf(line, "%u: ", &device) != 1)
 146             continue;
 147
 148         if (device == 0)
 149             snprintf(args, sizeof(args), "device=/dev/dsp");
 150         else
 151             snprintf(args, sizeof(args), "device=/dev/dsp%u", device);
 152
 153         if (!pa_module_load(c, "module-oss", args))
 154             continue;
 155
 156         n++;
 157
 158         if (just_one)
 159             break;
 160     }
 161
 162     fclose(f);
 163     return n;
 164 }
 165 #endif
 166
 167 #ifdef HAVE_SOLARIS
 168 static int detect_solaris(pa_core *c, int just_one) {
 169     struct stat s;
 170     const char *dev;
 171     char args[64];
 172
 173     dev = getenv("AUDIODEV");
 174     if (!dev)
 175         dev = "/dev/audio";
 176
 177     if (stat(dev, &s) < 0) {
 178         if (errno != ENOENT)
 179             pa_log_error(__FILE__": failed to open device %s: %s", dev, pa_cstrerror(errno));
 180         return -1;
 181     }
 182
 183     if (!S_ISCHR(s.st_mode))
 184         return 0;
 185
 186     snprintf(args, sizeof(args), "device=%s", dev);
 187
 188     if (!pa_module_load(c, "module-solaris", args))
 189         return 0;
 190
 191     return 1;
 192 }
 193 #endif
 194
 195 #ifdef OS_IS_WIN32
 196 static int detect_waveout(pa_core *c, int just_one) {
 197     /*
 198      * FIXME: No point in enumerating devices until the plugin supports
 199      * selecting anything but the first.
 200      */
 201     if (!pa_module_load(c, "module-waveout", ""))
 202         return 0;
 203
 204     return 1;
 205 }
 206 #endif
 207
 208 int pa__init(pa_core *c, pa_module*m) {
 209     int just_one = 0, n = 0;
 210     pa_modargs *ma;
 211
 212     static const char* const valid_modargs[] = {
 213         "just-one",
 214         NULL
 215     };
 216
 217     assert(c);
 218     assert(m);
 219
 220     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 221         pa_log(__FILE__": Failed to parse module arguments");
 222         goto fail;
 223     }
 224
 225     if (pa_modargs_get_value_boolean(ma, "just-one", &just_one) < 0) {
 226         pa_log(__FILE__": just_one= expects a boolean argument.");
 227         goto fail;
 228     }
 229
 230 #if HAVE_ALSA
 231     if ((n = detect_alsa(c, just_one)) <= 0)
 232 #endif
 233 #if HAVE_OSS
 234     if ((n = detect_oss(c, just_one)) <= 0)
 235 #endif
 236 #if HAVE_SOLARIS
 237     if ((n = detect_solaris(c, just_one)) <= 0)
 238 #endif
 239 #if OS_IS_WIN32
 240     if ((n = detect_waveout(c, just_one)) <= 0)
 241 #endif
 242     {
 243         pa_log_warn(__FILE__": failed to detect any sound hardware.");
 244         goto fail;
 245     }
 246
 247     pa_log_info(__FILE__": loaded %i modules.", n);
 248
 249     /* We were successful and can unload ourselves now. */
 250     pa_module_unload_request(m);
 251
 252     pa_modargs_free(ma);
 253
 254     return 0;
 255
 256 fail:
 257     if (ma)
 258         pa_modargs_free(ma);
 259
 260     return -1;
 261 }
 262
 263
 264 void pa__done(PA_GCC_UNUSED pa_core *c, PA_GCC_UNUSED pa_module*m) {
 265     /* NOP */
 266 }
 267