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ALSA: core: add .get_time_info

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Introduce more generic .get_time_info to retrieve
system timestamp and audio timestamp in single routine.
Backwards compatibility is preserved with same functionality
as with .wall_clock method (to be removed in following commits
to avoid breaking git bisect)

Signed-off-by: Pierre-Louis Bossart <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>
This commit is contained in:
Pierre-Louis Bossart 2015-02-13 15:14:06 -06:00 • committed by Takashi Iwai
commit 3179f62001
3 changed files with 87 additions and 29 deletions
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4
include/sound/pcm.h
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@ -76,6 +76,10 @@ struct snd_pcm_ops {
snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream);
int (*wall_clock)(struct snd_pcm_substream *substream,
struct timespec *audio_ts);
int (*get_time_info)(struct snd_pcm_substream *substream,
struct timespec *system_ts, struct timespec *audio_ts,
struct snd_pcm_audio_tstamp_config *audio_tstamp_config,
struct snd_pcm_audio_tstamp_report *audio_tstamp_report);
int (*copy)(struct snd_pcm_substream *substream, int channel,
snd_pcm_uframes_t pos,
void __user *buf, snd_pcm_uframes_t count);