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code.delx.au - pulseaudio/blob - polyp/oss-util.c
4 This file is part of polypaudio.
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.
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.
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
27 #include <sys/soundcard.h>
28 #include <sys/ioctl.h>
33 #include <sys/types.h>
39 int pa_oss_open(const char *device
, int *mode
, int* pcaps
) {
41 assert(device
&& mode
&& (*mode
== O_RDWR
|| *mode
== O_RDONLY
|| *mode
== O_WRONLY
));
43 if (*mode
== O_RDWR
) {
44 if ((fd
= open(device
, O_RDWR
|O_NDELAY
)) >= 0) {
46 ioctl(fd
, SNDCTL_DSP_SETDUPLEX
, 0);
48 tcaps
= pcaps
? pcaps
: &dcaps
;
50 if (ioctl(fd
, SNDCTL_DSP_GETCAPS
, tcaps
) < 0) {
51 fprintf(stderr
, __FILE__
": SNDCTL_DSP_GETCAPS: %s\n", strerror(errno
));
55 if (*tcaps
& DSP_CAP_DUPLEX
)
61 if ((fd
= open(device
, (*mode
= O_WRONLY
)|O_NDELAY
)) < 0) {
62 if ((fd
= open(device
, (*mode
= O_RDONLY
)|O_NDELAY
)) < 0) {
63 fprintf(stderr
, __FILE__
": open('%s'): %s\n", device
, strerror(errno
));
68 if ((fd
= open(device
, *mode
|O_NDELAY
)) < 0) {
69 fprintf(stderr
, __FILE__
": open('%s'): %s\n", device
, strerror(errno
));
75 if (ioctl(fd
, SNDCTL_DSP_GETCAPS
, pcaps
) < 0) {
76 fprintf(stderr
, "SNDCTL_DSP_GETCAPS: %s\n", strerror(errno
));
89 int pa_oss_auto_format(int fd
, struct pa_sample_spec
*ss
) {
90 int format
, channels
, speed
, reqformat
;
91 static const int format_trans
[] = {
92 [PA_SAMPLE_U8
] = AFMT_U8
,
93 [PA_SAMPLE_ALAW
] = AFMT_A_LAW
,
94 [PA_SAMPLE_ULAW
] = AFMT_MU_LAW
,
95 [PA_SAMPLE_S16LE
] = AFMT_S16_LE
,
96 [PA_SAMPLE_S16BE
] = AFMT_S16_BE
,
97 [PA_SAMPLE_FLOAT32LE
] = AFMT_QUERY
, /* not supported */
98 [PA_SAMPLE_FLOAT32BE
] = AFMT_QUERY
, /* not supported */
101 assert(fd
>= 0 && ss
);
103 reqformat
= format
= format_trans
[ss
->format
];
104 if (reqformat
== AFMT_QUERY
|| ioctl(fd
, SNDCTL_DSP_SETFMT
, &format
) < 0 || format
!= reqformat
) {
105 format
= AFMT_S16_NE
;
106 if (ioctl(fd
, SNDCTL_DSP_SETFMT
, &format
) < 0 || format
!= AFMT_S16_NE
) {
107 int f
= AFMT_S16_NE
== AFMT_S16_LE
? AFMT_S16_BE
: AFMT_S16_LE
;
109 if (ioctl(fd
, SNDCTL_DSP_SETFMT
, &format
) < 0 || format
!= f
) {
111 if (ioctl(fd
, SNDCTL_DSP_SETFMT
, &format
) < 0 || format
!= AFMT_U8
) {
112 fprintf(stderr
, "SNDCTL_DSP_SETFMT: %s\n", format
!= AFMT_U8
? "No supported sample format" : strerror(errno
));
115 ss
->format
= PA_SAMPLE_U8
;
117 ss
->format
= f
== AFMT_S16_LE
? PA_SAMPLE_S16LE
: PA_SAMPLE_S16BE
;
119 ss
->format
= PA_SAMPLE_S16NE
;
122 channels
= ss
->channels
;
123 if (ioctl(fd
, SNDCTL_DSP_CHANNELS
, &channels
) < 0) {
124 fprintf(stderr
, "SNDCTL_DSP_CHANNELS: %s\n", strerror(errno
));
128 ss
->channels
= channels
;
131 if (ioctl(fd
, SNDCTL_DSP_SPEED
, &speed
) < 0) {
132 fprintf(stderr
, "SNDCTL_DSP_SPEED: %s\n", strerror(errno
));
141 static int log2(int v
) {
153 int pa_oss_set_fragments(int fd
, int nfrags
, int frag_size
) {
155 arg
= ((int) nfrags
<< 16) | log2(frag_size
);
157 if (ioctl(fd
, SNDCTL_DSP_SETFRAGMENT
, &arg
) < 0) {
158 fprintf(stderr
, "SNDCTL_DSP_SETFRAGMENT: %s\n", strerror(errno
));