From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 12 Apr 2005 15:33:59 +0000 (+0200)
Subject: [ALSA] Fix capture on OSS emulation
X-Git-Tag: v2.6.13-rc1~68^2~690
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=004e65389714721ce0f52a8f0fc22999d3908a2a;p=linux-2.6

[ALSA] Fix capture on OSS emulation

ALSA<-OSS emulation
Fix the noisy capture on some hardwares over OSS emulation.
Change back to avail_min = period_size for capture direction.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index 1a805020f5..6c8fdcaf9f 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -464,7 +464,8 @@ static int snd_pcm_oss_change_params(snd_pcm_substream_t *substream)
 	sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 	sw_params->period_step = 1;
 	sw_params->sleep_min = 0;
-	sw_params->avail_min = 1;
+	sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
+		1 : runtime->period_size;
 	sw_params->xfer_align = 1;
 	if (atomic_read(&runtime->mmap_count) ||
 	    (substream->oss.setup && substream->oss.setup->nosilence)) {