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[ALSA] OSS PCM emulation - The final fix for SNDCTL_DSP_GETOPTR problem 

ALSA<-OSS emulation
The problem was negative result (info.bytes) in a specific condition at
playback startup.

Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Jaroslav Kysela 2005-05-31 15:44:23 +02:00
parent 21cb2a2ec5
commit fb4bd0adc4
1 changed files with 5 additions and 2 deletions
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7
sound/core/oss/pcm_oss.c
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@ -1539,10 +1539,13 @@ static int snd_pcm_oss_get_ptr(snd_pcm_oss_file_t *pcm_oss_file, int stream, str
} else {
delay = snd_pcm_oss_bytes(substream, delay) + fixup;
info.blocks = delay / runtime->oss.period_bytes;
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
if (runtime->oss.bytes == 0)
delay = 0;
info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
else
} else {
info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
}
}
if (copy_to_user(_info, &info, sizeof(info)))
return -EFAULT;