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make the rw selection do the right thing elsewhere

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Bill Currie 2001-05-21 01:13:44 +00:00
parent d90d3d0de3
commit a90f8132a7
1 changed files with 6 additions and 3 deletions
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9
source/snd_oss.c
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@ -81,19 +81,22 @@ SNDDMA_Init (void)
int caps;
int retries = 3;
int omode = O_WRONLY;
int mmmode = PROT_WRITE;
snd_inited = 0;
// open /dev/dsp, confirm capability to mmap, and get size of dma buffer
if (COM_CheckParm ("-sndrw"))
if (COM_CheckParm ("-sndrw")) {
omode = O_RDWR;
mmmode |= PROT_READ;
}
audio_fd = open ("/dev/dsp", omode);
if (audio_fd < 0) { // Failed open, retry up to 3 times
// if it's busy
while ((audio_fd < 0) && retries-- &&
((errno == EAGAIN) || (errno == EBUSY))) {
sleep (1);
audio_fd = open ("/dev/dsp", O_RDWR);
audio_fd = open ("/dev/dsp", omode);
}
if (audio_fd < 0) {
perror ("/dev/dsp");
@ -180,7 +183,7 @@ SNDDMA_Init (void)
// memory map the dma buffer
shm->buffer = (unsigned char *) mmap (NULL, info.fragstotal
* info.fragsize,
PROT_READ | PROT_WRITE,
mmmode,
MAP_FILE | MAP_SHARED, audio_fd, 0);
if (shm->buffer == MAP_FAILED) {