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authorTakashi Iwai <tiwai@suse.de>2005-09-08 13:48:34 +0200
committerJaroslav Kysela <perex@suse.cz>2005-09-12 10:47:37 +0200
commit10f69f9e42833b82288882d10901dc86adc3e473 (patch)
treeed2767c07158e36cf2eba4127a9d986428b2e89a /sound
parentf328385309f310626751c54f694641459e2d4582 (diff)
downloadop-kernel-dev-10f69f9e42833b82288882d10901dc86adc3e473.zip
op-kernel-dev-10f69f9e42833b82288882d10901dc86adc3e473.tar.gz
[ALSA] pcm-oss - Add bugg-yptr option
Documentation,ALSA<-OSS emulation Added 'buggy-ptr' proc option to switch the behavior of GETOPTR ioctl. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/core/oss/pcm_oss.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index 1e60639..a038fd8 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -1543,7 +1543,11 @@ 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);
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
- info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
+ snd_pcm_oss_setup_t *setup = substream->oss.setup;
+ if (setup && setup->buggyptr)
+ info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
+ else
+ info.blocks = (delay + fixup) / runtime->oss.period_bytes;
info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
} else {
delay += fixup;
@@ -2350,6 +2354,8 @@ static void snd_pcm_oss_proc_write(snd_info_entry_t *entry,
template.partialfrag = 1;
} else if (!strcmp(str, "no-silence")) {
template.nosilence = 1;
+ } else if (!strcmp(str, "buggy-ptr")) {
+ template.buggyptr = 1;
}
} while (*str);
if (setup == NULL) {
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