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pcm: recalculate all rules after changing hw_params flags

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The rules engine avoids recalculating rules that do not depend on
any changed parameter, but there is no mechanism to record changed
flags.  So when we change a flag, we have to ensure that all rules
depending on that flag are recalculated; the only method to do this
is to force recalculation of all rules.

So far, there have been no kernel drivers with rules depending
on flags, but rules to disable hardware SRCs by setting
SND_PCM_HW_PARAMS_NORESAMPLE are being introduced now.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch 2011-09-21 08:30:20 +02:00
parent 7924500688
commit 6dab1a91cb
1 changed files with 3 additions and 0 deletions
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3
src/pcm/pcm.c
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@ -4200,6 +4200,7 @@ int snd_pcm_hw_params_set_rate_resample(snd_pcm_t *pcm, snd_pcm_hw_params_t *par
params->flags |= SND_PCM_HW_PARAMS_NORESAMPLE;
else
params->flags &= ~SND_PCM_HW_PARAMS_NORESAMPLE;
params->rmask = ~0;
return snd_pcm_hw_refine(pcm, params);
}
@ -4231,6 +4232,7 @@ int snd_pcm_hw_params_set_export_buffer(snd_pcm_t *pcm, snd_pcm_hw_params_t *par
params->flags |= SND_PCM_HW_PARAMS_EXPORT_BUFFER;
else
params->flags &= ~SND_PCM_HW_PARAMS_EXPORT_BUFFER;
params->rmask = ~0;
return snd_pcm_hw_refine(pcm, params);
}
@ -4280,6 +4282,7 @@ int snd_pcm_hw_params_set_period_wakeup(snd_pcm_t *pcm, snd_pcm_hw_params_t *par
params->flags |= SND_PCM_HW_PARAMS_NO_PERIOD_WAKEUP;
} else
params->flags &= ~SND_PCM_HW_PARAMS_NO_PERIOD_WAKEUP;
params->rmask = ~0;
return snd_pcm_hw_refine(pcm, params);
}