[Alsa-devel] problem with "snd_pcm_hw_params_set_period_size_near"

[James Courtier-Dutton]

if the buffer size has already been set to 16384, and the period_size is 
trying to be set to 8196, why do I get the following results: -

period_size=8196
dir=0;
err = snd_pcm_hw_params_set_period_size_near(this->audio_fd, params, 
&period_size, &dir);
result: period_size=8196

period_size=8196
dir=1;
err = snd_pcm_hw_params_set_period_size_near(this->audio_fd, params, 
&period_size, &dir);
result: period_size=16384

In the second example, all that has changed in the value of "dir".
I though
-1 means find a value equal to or less than.
0 means find a value closest to.
1 means find a value equal to or greater than.
But the above experiment resulted in: -
1 means find a value greater than.
Cheers
James


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