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| author | Takashi Iwai <tiwai@suse.de> | 2014-07-16 17:45:27 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2014-07-21 09:07:46 +0200 |
| commit | 589008106b9b64153554c8f3f120ee512b134bb5 (patch) | |
| tree | 087d7b1197dcc6933a87f82d84f955345b126c74 /include/uapi | |
| parent | ALSA: pcm: Add timestamp type to sw_params (diff) | |
| download | linux-589008106b9b64153554c8f3f120ee512b134bb5.tar.xz linux-589008106b9b64153554c8f3f120ee512b134bb5.zip | |
ALSA: pcm: Introduce protocol version field to sw_params
For controlling the new fields more strictly, add sw_params.proto
field indicating the protocol version of the user-space. User-space
should fill the SNDRV_PCM_VERSION value it's built with, then kernel
can know whether the new fields should be evaluated or not.
And now tstamp_type field is evaluated only when the valid value is
set there. This avoids the wrong override of tstamp_type to zero,
which is SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/sound/asound.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/uapi/sound/asound.h b/include/uapi/sound/asound.h index a7e062f91f39..32168f7ffce3 100644 --- a/include/uapi/sound/asound.h +++ b/include/uapi/sound/asound.h @@ -391,8 +391,8 @@ struct snd_pcm_sw_params { snd_pcm_uframes_t silence_threshold; /* min distance from noise for silence filling */ snd_pcm_uframes_t silence_size; /* silence block size */ snd_pcm_uframes_t boundary; /* pointers wrap point */ - unsigned int tstamp_type; /* timestamp type */ - int pads; /* alignment, reserved */ + unsigned int proto; /* protocol version */ + unsigned int tstamp_type; /* timestamp type (req. proto >= 2.0.12) */ unsigned char reserved[56]; /* reserved for future */ }; |