code.delx.au - pulseaudio/blob - src/modules/oss-util.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 <assert.h>
  27 #include <sys/soundcard.h>
  28 #include <sys/ioctl.h>
  29 #include <stdio.h>
  30 #include <errno.h>
  31 #include <string.h>
  32 #include <unistd.h>
  33 #include <sys/types.h>
  34 #include <sys/stat.h>
  35 #include <fcntl.h>
  36
  37 #include <polypcore/util.h>
  38 #include <polypcore/log.h>
  39
  40 #include "oss-util.h"
  41
  42 int pa_oss_open(const char *device, int *mode, int* pcaps) {
  43     int fd = -1;
  44     assert(device && mode && (*mode == O_RDWR || *mode == O_RDONLY || *mode == O_WRONLY));
  45
  46     if (*mode == O_RDWR) {
  47         if ((fd = open(device, O_RDWR|O_NDELAY)) >= 0) {
  48             int dcaps, *tcaps;
  49             ioctl(fd, SNDCTL_DSP_SETDUPLEX, 0);
  50
  51             tcaps = pcaps ? pcaps : &dcaps;
  52
  53             if (ioctl(fd, SNDCTL_DSP_GETCAPS, tcaps) < 0) {
  54                 pa_log(__FILE__": SNDCTL_DSP_GETCAPS: %s", strerror(errno));
  55                 goto fail;
  56             }
  57
  58             if (*tcaps & DSP_CAP_DUPLEX)
  59                 goto success;
  60
  61             pa_log_warn(__FILE__": '%s' doesn't support full duplex", device);
  62
  63             close(fd);
  64         }
  65
  66         if ((fd = open(device, (*mode = O_WRONLY)|O_NDELAY)) < 0) {
  67             if ((fd = open(device, (*mode = O_RDONLY)|O_NDELAY)) < 0) {
  68                 pa_log(__FILE__": open('%s'): %s", device, strerror(errno));
  69                 goto fail;
  70             }
  71         }
  72     } else {
  73         if ((fd = open(device, *mode|O_NDELAY)) < 0) {
  74             pa_log(__FILE__": open('%s'): %s", device, strerror(errno));
  75             goto fail;
  76         }
  77     }
  78
  79 success:
  80
  81     if (pcaps) {
  82         if (ioctl(fd, SNDCTL_DSP_GETCAPS, pcaps) < 0) {
  83             pa_log(__FILE__": SNDCTL_DSP_GETCAPS: %s", strerror(errno));
  84             goto fail;
  85         }
  86     }
  87
  88     pa_fd_set_cloexec(fd, 1);
  89
  90     return fd;
  91
  92 fail:
  93     if (fd >= 0)
  94         close(fd);
  95     return -1;
  96 }
  97
  98 int pa_oss_auto_format(int fd, pa_sample_spec *ss) {
  99     int format, channels, speed, reqformat;
 100     static const int format_trans[PA_SAMPLE_MAX] = {
 101         [PA_SAMPLE_U8] = AFMT_U8,
 102         [PA_SAMPLE_ALAW] = AFMT_A_LAW,
 103         [PA_SAMPLE_ULAW] = AFMT_MU_LAW,
 104         [PA_SAMPLE_S16LE] = AFMT_S16_LE,
 105         [PA_SAMPLE_S16BE] = AFMT_S16_BE,
 106         [PA_SAMPLE_FLOAT32LE] = AFMT_QUERY, /* not supported */
 107         [PA_SAMPLE_FLOAT32BE] = AFMT_QUERY, /* not supported */
 108     };
 109
 110     assert(fd >= 0 && ss);
 111
 112     reqformat = format = format_trans[ss->format];
 113     if (reqformat == AFMT_QUERY || ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != reqformat) {
 114         format = AFMT_S16_NE;
 115         if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != AFMT_S16_NE) {
 116             int f = AFMT_S16_NE == AFMT_S16_LE ? AFMT_S16_BE : AFMT_S16_LE;
 117             format = f;
 118             if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != f) {
 119                 format = AFMT_U8;
 120                 if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != AFMT_U8) {
 121                     pa_log(__FILE__": SNDCTL_DSP_SETFMT: %s", format != AFMT_U8 ? "No supported sample format" : strerror(errno));
 122                     return -1;
 123                 } else
 124                     ss->format = PA_SAMPLE_U8;
 125             } else
 126                 ss->format = f == AFMT_S16_LE ? PA_SAMPLE_S16LE : PA_SAMPLE_S16BE;
 127         } else
 128             ss->format = PA_SAMPLE_S16NE;
 129     }
 130
 131     channels = ss->channels;
 132     if (ioctl(fd, SNDCTL_DSP_CHANNELS, &channels) < 0) {
 133         pa_log(__FILE__": SNDCTL_DSP_CHANNELS: %s", strerror(errno));
 134         return -1;
 135     }
 136     assert(channels);
 137     ss->channels = channels;
 138
 139     speed = ss->rate;
 140     if (ioctl(fd, SNDCTL_DSP_SPEED, &speed) < 0) {
 141         pa_log(__FILE__": SNDCTL_DSP_SPEED: %s", strerror(errno));
 142         return -1;
 143     }
 144     assert(speed);
 145     ss->rate = speed;
 146
 147     return 0;
 148 }
 149
 150 static int simple_log2(int v) {
 151     int k = 0;
 152
 153     for (;;) {
 154         v >>= 1;
 155         if (!v) break;
 156         k++;
 157     }
 158
 159     return k;
 160 }
 161
 162 int pa_oss_set_fragments(int fd, int nfrags, int frag_size) {
 163     int arg;
 164     arg = ((int) nfrags << 16) | simple_log2(frag_size);
 165
 166     if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &arg) < 0) {
 167         pa_log(__FILE__": SNDCTL_DSP_SETFRAGMENT: %s", strerror(errno));
 168         return -1;
 169     }
 170
 171     return 0;
 172 }
 173
 174 static int pa_oss_get_volume(int fd, int mixer, const pa_sample_spec *ss, pa_cvolume *volume) {
 175     char cv[PA_CVOLUME_SNPRINT_MAX];
 176     unsigned vol;
 177
 178     assert(fd >= 0);
 179     assert(ss);
 180     assert(volume);
 181
 182     if (ioctl(fd, mixer, &vol) < 0)
 183         return -1;
 184
 185     volume->values[0] = ((vol & 0xFF) * PA_VOLUME_NORM) / 100;
 186
 187     if ((volume->channels = ss->channels) >= 2)
 188         volume->values[1] = (((vol >> 8) & 0xFF) * PA_VOLUME_NORM) / 100;
 189
 190     pa_log_debug(__FILE__": Read mixer settings: %s", pa_cvolume_snprint(cv, sizeof(cv), volume));
 191     return 0;
 192 }
 193
 194 static int pa_oss_set_volume(int fd, int mixer, const pa_sample_spec *ss, const pa_cvolume *volume) {
 195     char cv[PA_CVOLUME_SNPRINT_MAX];
 196     unsigned vol;
 197     pa_volume_t l, r;
 198
 199     l = volume->values[0] > PA_VOLUME_NORM ? PA_VOLUME_NORM : volume->values[0];
 200
 201     vol = (l*100)/PA_VOLUME_NORM;
 202
 203     if (ss->channels >= 2) {
 204         r = volume->values[1] > PA_VOLUME_NORM ? PA_VOLUME_NORM : volume->values[1];
 205         vol |= ((r*100)/PA_VOLUME_NORM) << 8;
 206     }
 207
 208     if (ioctl(fd, mixer, &vol) < 0)
 209         return -1;
 210
 211     pa_log_debug(__FILE__": Wrote mixer settings: %s", pa_cvolume_snprint(cv, sizeof(cv), volume));
 212     return 0;
 213 }
 214
 215 int pa_oss_get_pcm_volume(int fd, const pa_sample_spec *ss, pa_cvolume *volume) {
 216     return pa_oss_get_volume(fd, SOUND_MIXER_READ_PCM, ss, volume);
 217 }
 218
 219 int pa_oss_set_pcm_volume(int fd, const pa_sample_spec *ss, const pa_cvolume *volume) {
 220     return pa_oss_set_volume(fd, SOUND_MIXER_WRITE_PCM, ss, volume);
 221 }
 222
 223 int pa_oss_get_input_volume(int fd, const pa_sample_spec *ss, pa_cvolume *volume) {
 224     return pa_oss_get_volume(fd, SOUND_MIXER_READ_IGAIN, ss, volume);
 225 }
 226
 227 int pa_oss_set_input_volume(int fd, const pa_sample_spec *ss, const pa_cvolume *volume) {
 228     return pa_oss_set_volume(fd, SOUND_MIXER_WRITE_IGAIN, ss, volume);
 229 }
 230
 231 int pa_oss_get_hw_description(const char *dev, char *name, size_t l) {
 232     FILE *f;
 233     const char *e = NULL;
 234     int n, r = -1;
 235     int b = 0;
 236
 237     if (strncmp(dev, "/dev/dsp", 8) == 0)
 238         e = dev+8;
 239     else if (strncmp(dev, "/dev/adsp", 9) == 0)
 240         e = dev+9;
 241     else
 242         return -1;
 243
 244     if (*e == 0)
 245         n = 0;
 246     else if (*e >= '0' && *e <= '9' && *(e+1) == 0)
 247         n = *e - '0';
 248     else
 249         return -1;
 250
 251     if (!(f = fopen("/dev/sndstat", "r")) &&
 252         !(f = fopen("/proc/sndstat", "r")) &&
 253         !(f = fopen("/proc/asound/oss/sndstat", "r"))) {
 254
 255         if (errno != ENOENT)
 256             pa_log_warn(__FILE__": failed to open OSS sndstat device: %s", strerror(errno));
 257
 258         return -1;
 259     }
 260
 261     while (!feof(f)) {
 262         char line[64];
 263         int device;
 264
 265         if (!fgets(line, sizeof(line), f))
 266             break;
 267
 268         line[strcspn(line, "\r\n")] = 0;
 269
 270         if (!b) {
 271             b = strcmp(line, "Audio devices:") == 0;
 272             continue;
 273         }
 274
 275         if (line[0] == 0)
 276             break;
 277
 278         if (sscanf(line, "%i: ", &device) != 1)
 279             continue;
 280
 281         if (device == n) {
 282             char *k = strchr(line, ':');
 283             assert(k);
 284             k++;
 285             k += strspn(k, " ");
 286
 287             if (pa_endswith(k, " (DUPLEX)"))
 288                 k[strlen(k)-9] = 0;
 289
 290             pa_strlcpy(name, k, l);
 291             r = 0;
 292             break;
 293         }
 294     }
 295
 296     fclose(f);
 297     return r;
 298 }