4 This file is part of PulseAudio.
6 Copyright 2004-2006 Lennart Poettering
7 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
9 PulseAudio is free software; you can redistribute it and/or modify
10 it under the terms of the GNU Lesser General Public License as published
11 by the Free Software Foundation; either version 2 of the License,
12 or (at your option) any later version.
14 PulseAudio is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 General Public License for more details.
19 You should have received a copy of the GNU Lesser General Public License
20 along with PulseAudio; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
30 #include <sys/soundcard.h>
31 #include <sys/ioctl.h>
36 #include <sys/types.h>
40 #include <pulsecore/core-error.h>
41 #include <pulsecore/core-util.h>
42 #include <pulsecore/log.h>
46 int pa_oss_open(const char *device
, int *mode
, int* pcaps
) {
50 assert(device
&& mode
&& (*mode
== O_RDWR
|| *mode
== O_RDONLY
|| *mode
== O_WRONLY
));
55 if (*mode
== O_RDWR
) {
56 if ((fd
= open(device
, O_RDWR
|O_NDELAY
)) >= 0) {
58 ioctl(fd
, SNDCTL_DSP_SETDUPLEX
, 0);
60 tcaps
= pcaps
? pcaps
: &dcaps
;
62 if (ioctl(fd
, SNDCTL_DSP_GETCAPS
, tcaps
) < 0) {
63 pa_log("SNDCTL_DSP_GETCAPS: %s", pa_cstrerror(errno
));
67 if (*tcaps
& DSP_CAP_DUPLEX
)
70 pa_log_warn("'%s' doesn't support full duplex", device
);
75 if ((fd
= open(device
, (*mode
= O_WRONLY
)|O_NDELAY
)) < 0) {
76 if ((fd
= open(device
, (*mode
= O_RDONLY
)|O_NDELAY
)) < 0) {
77 pa_log("open('%s'): %s", device
, pa_cstrerror(errno
));
82 if ((fd
= open(device
, *mode
|O_NDELAY
)) < 0) {
83 pa_log("open('%s'): %s", device
, pa_cstrerror(errno
));
92 if (ioctl(fd
, SNDCTL_DSP_GETCAPS
, pcaps
) < 0) {
93 pa_log("SNDCTL_DSP_GETCAPS: %s", pa_cstrerror(errno
));
97 pa_log_debug("capabilities:%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
98 *pcaps
& DSP_CAP_BATCH
? " BATCH" : "",
100 *pcaps
& DSP_CAP_BIND
? " BIND" : "",
104 *pcaps
& DSP_CAP_COPROC
? " COPROC" : "",
105 *pcaps
& DSP_CAP_DUPLEX
? " DUPLEX" : "",
106 #ifdef DSP_CAP_FREERATE
107 *pcaps
& DSP_CAP_FREERATE
? " FREERATE" : "",
112 *pcaps
& DSP_CAP_INPUT
? " INPUT" : "",
116 *pcaps
& DSP_CAP_MMAP
? " MMAP" : "",
118 *pcaps
& DSP_CAP_MODEM
? " MODEM" : "",
123 *pcaps
& DSP_CAP_MULTI
? " MULTI" : "",
127 #ifdef DSP_CAP_OUTPUT
128 *pcaps
& DSP_CAP_OUTPUT
? " OUTPUT" : "",
132 *pcaps
& DSP_CAP_REALTIME
? " REALTIME" : "",
133 #ifdef DSP_CAP_SHADOW
134 *pcaps
& DSP_CAP_SHADOW
? " SHADOW" : "",
138 #ifdef DSP_CAP_VIRTUAL
139 *pcaps
& DSP_CAP_VIRTUAL
? " VIRTUAL" : "",
143 *pcaps
& DSP_CAP_TRIGGER
? " TRIGGER" : "");
145 pa_fd_set_cloexec(fd
, 1);
155 int pa_oss_auto_format(int fd
, pa_sample_spec
*ss
) {
156 int format
, channels
, speed
, reqformat
;
157 pa_sample_format_t orig_format
;
159 static const int format_trans
[PA_SAMPLE_MAX
] = {
160 [PA_SAMPLE_U8
] = AFMT_U8
,
161 [PA_SAMPLE_ALAW
] = AFMT_A_LAW
,
162 [PA_SAMPLE_ULAW
] = AFMT_MU_LAW
,
163 [PA_SAMPLE_S16LE
] = AFMT_S16_LE
,
164 [PA_SAMPLE_S16BE
] = AFMT_S16_BE
,
165 [PA_SAMPLE_FLOAT32LE
] = AFMT_QUERY
, /* not supported */
166 [PA_SAMPLE_FLOAT32BE
] = AFMT_QUERY
, /* not supported */
169 assert(fd
>= 0 && ss
);
171 orig_format
= ss
->format
;
173 reqformat
= format
= format_trans
[ss
->format
];
174 if (reqformat
== AFMT_QUERY
|| ioctl(fd
, SNDCTL_DSP_SETFMT
, &format
) < 0 || format
!= reqformat
) {
175 format
= AFMT_S16_NE
;
176 if (ioctl(fd
, SNDCTL_DSP_SETFMT
, &format
) < 0 || format
!= AFMT_S16_NE
) {
177 int f
= AFMT_S16_NE
== AFMT_S16_LE
? AFMT_S16_BE
: AFMT_S16_LE
;
179 if (ioctl(fd
, SNDCTL_DSP_SETFMT
, &format
) < 0 || format
!= f
) {
181 if (ioctl(fd
, SNDCTL_DSP_SETFMT
, &format
) < 0 || format
!= AFMT_U8
) {
182 pa_log("SNDCTL_DSP_SETFMT: %s", format
!= AFMT_U8
? "No supported sample format" : pa_cstrerror(errno
));
185 ss
->format
= PA_SAMPLE_U8
;
187 ss
->format
= f
== AFMT_S16_LE
? PA_SAMPLE_S16LE
: PA_SAMPLE_S16BE
;
189 ss
->format
= PA_SAMPLE_S16NE
;
192 if (orig_format
!= ss
->format
)
193 pa_log_warn("device doesn't support sample format %s, changed to %s.",
194 pa_sample_format_to_string(orig_format
),
195 pa_sample_format_to_string(ss
->format
));
197 channels
= ss
->channels
;
198 if (ioctl(fd
, SNDCTL_DSP_CHANNELS
, &channels
) < 0) {
199 pa_log("SNDCTL_DSP_CHANNELS: %s", pa_cstrerror(errno
));
202 assert(channels
> 0);
204 if (ss
->channels
!= channels
) {
205 pa_log_warn("device doesn't support %i channels, using %i channels.", ss
->channels
, channels
);
206 ss
->channels
= channels
;
210 if (ioctl(fd
, SNDCTL_DSP_SPEED
, &speed
) < 0) {
211 pa_log("SNDCTL_DSP_SPEED: %s", pa_cstrerror(errno
));
216 if (ss
->rate
!= (unsigned) speed
) {
217 pa_log_warn("device doesn't support %i Hz, changed to %i Hz.", ss
->rate
, speed
);
219 /* If the sample rate deviates too much, we need to resample */
220 if (speed
< ss
->rate
*.95 || speed
> ss
->rate
*1.05)
227 static int simple_log2(int v
) {
239 int pa_oss_set_fragments(int fd
, int nfrags
, int frag_size
) {
241 arg
= ((int) nfrags
<< 16) | simple_log2(frag_size
);
243 if (ioctl(fd
, SNDCTL_DSP_SETFRAGMENT
, &arg
) < 0) {
244 pa_log("SNDCTL_DSP_SETFRAGMENT: %s", pa_cstrerror(errno
));
251 static int pa_oss_get_volume(int fd
, int mixer
, const pa_sample_spec
*ss
, pa_cvolume
*volume
) {
252 char cv
[PA_CVOLUME_SNPRINT_MAX
];
259 if (ioctl(fd
, mixer
, &vol
) < 0)
262 volume
->values
[0] = ((vol
& 0xFF) * PA_VOLUME_NORM
) / 100;
264 if ((volume
->channels
= ss
->channels
) >= 2)
265 volume
->values
[1] = (((vol
>> 8) & 0xFF) * PA_VOLUME_NORM
) / 100;
267 pa_log_debug("Read mixer settings: %s", pa_cvolume_snprint(cv
, sizeof(cv
), volume
));
271 static int pa_oss_set_volume(int fd
, int mixer
, const pa_sample_spec
*ss
, const pa_cvolume
*volume
) {
272 char cv
[PA_CVOLUME_SNPRINT_MAX
];
276 l
= volume
->values
[0] > PA_VOLUME_NORM
? PA_VOLUME_NORM
: volume
->values
[0];
278 vol
= (l
*100)/PA_VOLUME_NORM
;
280 if (ss
->channels
>= 2) {
281 r
= volume
->values
[1] > PA_VOLUME_NORM
? PA_VOLUME_NORM
: volume
->values
[1];
282 vol
|= ((r
*100)/PA_VOLUME_NORM
) << 8;
285 if (ioctl(fd
, mixer
, &vol
) < 0)
288 pa_log_debug("Wrote mixer settings: %s", pa_cvolume_snprint(cv
, sizeof(cv
), volume
));
292 int pa_oss_get_pcm_volume(int fd
, const pa_sample_spec
*ss
, pa_cvolume
*volume
) {
293 return pa_oss_get_volume(fd
, SOUND_MIXER_READ_PCM
, ss
, volume
);
296 int pa_oss_set_pcm_volume(int fd
, const pa_sample_spec
*ss
, const pa_cvolume
*volume
) {
297 return pa_oss_set_volume(fd
, SOUND_MIXER_WRITE_PCM
, ss
, volume
);
300 int pa_oss_get_input_volume(int fd
, const pa_sample_spec
*ss
, pa_cvolume
*volume
) {
301 return pa_oss_get_volume(fd
, SOUND_MIXER_READ_IGAIN
, ss
, volume
);
304 int pa_oss_set_input_volume(int fd
, const pa_sample_spec
*ss
, const pa_cvolume
*volume
) {
305 return pa_oss_set_volume(fd
, SOUND_MIXER_WRITE_IGAIN
, ss
, volume
);
308 int pa_oss_get_hw_description(const char *dev
, char *name
, size_t l
) {
310 const char *e
= NULL
;
314 if (strncmp(dev
, "/dev/dsp", 8) == 0)
316 else if (strncmp(dev
, "/dev/adsp", 9) == 0)
323 else if (*e
>= '0' && *e
<= '9' && *(e
+1) == 0)
328 if (!(f
= fopen("/dev/sndstat", "r")) &&
329 !(f
= fopen("/proc/sndstat", "r")) &&
330 !(f
= fopen("/proc/asound/oss/sndstat", "r"))) {
333 pa_log_warn("failed to open OSS sndstat device: %s", pa_cstrerror(errno
));
342 if (!fgets(line
, sizeof(line
), f
))
345 line
[strcspn(line
, "\r\n")] = 0;
348 b
= strcmp(line
, "Audio devices:") == 0;
355 if (sscanf(line
, "%i: ", &device
) != 1)
359 char *k
= strchr(line
, ':');
364 if (pa_endswith(k
, " (DUPLEX)"))
367 pa_strlcpy(name
, k
, l
);