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[ALSA] PCM interface - rename SNDRV_PCM_TSTAMP_MMAP to SNDRV_PCM_TSTAMP_ENABLE

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Change semantics for SNDRV_PCM_TSTAMP_MMAP. Doing timestamping only in
the interrupt handler might cause that hw_ptr is not related to actual
timestamp. With this change, grab timestamp at every hw_ptr update to
have always valid timestamp + ring buffer position pair.
With this change, SNDRV_PCM_TSTAMP_MMAP was renamed to
SNDRV_PCM_TSTAMP_ENABLE. It's no regression (I think).

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela
2008-01-11 08:45:08 +01:00
parent a64135a2d8
commit 8c12158687
4 changed files with 12 additions and 6 deletions
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4
include/sound/asound.h
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@@ -354,8 +354,8 @@ struct snd_pcm_hw_params {
enum {
SNDRV_PCM_TSTAMP_NONE = 0,
SNDRV_PCM_TSTAMP_MMAP,
SNDRV_PCM_TSTAMP_LAST = SNDRV_PCM_TSTAMP_MMAP,
SNDRV_PCM_TSTAMP_ENABLE,
SNDRV_PCM_TSTAMP_LAST = SNDRV_PCM_TSTAMP_ENABLE,
};
struct snd_pcm_sw_params {