From fb4bd0adc4b5b6538933b098a67851d8f99b5ca3 Mon Sep 17 00:00:00 2001 From: Jaroslav Kysela Date: Tue, 31 May 2005 15:44:23 +0200 Subject: [PATCH] [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 --- sound/core/oss/pcm_oss.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c index 468fca8894d9..203470df5857 100644 --- a/sound/core/oss/pcm_oss.c +++ b/sound/core/oss/pcm_oss.c @@ -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; -- 2.20.1