At Wed, 25 Feb 2009 15:11:44 +0000,
Clive Messer wrote:
> 36192 36191 100068 3 0 0 1 2
> 36195 36194 100090 2 0 0 1 2
> 36198 36198 100113 1 0 0 1 2
> 36207 36206 63854 2816 1600 0 1 3
> 36212 36211 63854 2815 1601 4 1 3
> 36216 36216 63854 2814 1602 4 1 3
> 36221 36220 63854 2813 1603 4 1 3
> 36225 36225 101224 4460 -44 4 1 3
This is pretty weird. Is this behavior always reproducible?
What shows with the patch below to alsa-lib?
Also, any change if you play with position_fix parameter, such as,
position_fix=1?
Takashi
---
diff --git a/src/pcm/pcm_hw.c b/src/pcm/pcm_hw.c
index e9ce092..9b91a13 100644
--- a/src/pcm/pcm_hw.c
+++ b/src/pcm/pcm_hw.c
@@ -539,6 +539,10 @@ static int snd_pcm_hw_hwsync(snd_pcm_t *pcm)
{
snd_pcm_hw_t *hw = pcm->private_data;
int fd = hw->fd, err;
+ long old_hwptr, new_hwptr;
+ long old_applptr, new_applptr;
+ old_hwptr = *pcm->hw.ptr;
+ old_applptr = *pcm->appl.ptr;
if (SNDRV_PROTOCOL_VERSION(2, 0, 3) <= hw->version) {
if (hw->sync_ptr) {
err = sync_ptr1(hw, SNDRV_PCM_SYNC_PTR_HWSYNC);
@@ -564,6 +568,11 @@ static int snd_pcm_hw_hwsync(snd_pcm_t *pcm)
}
}
}
+ new_hwptr = *pcm->hw.ptr;
+ new_applptr = *pcm->appl.ptr;
+ printf("hwsync: %ld(%ld), %ld(%ld)\n",
+ new_hwptr, new_hwptr - old_hwptr,
+ new_applptr, new_applptr - old_applptr);
return 0;
}
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