Re: [alsa-devel] Requiring the same sample rate for playback and record?

Takashi Iwai wrote:

Then you can call like:

 snd_pcm_hw_constraint_minmax(substream->runtime,
SNDRV_PCM_HW_PARAM_RATE, fixed_rate, fixed_rate);

Ok, I think I got this working. However, I'm not sure how to handle the sample size. I have this:

struct snd_pcm_runtime *first_runtime = ssi_private->first_stream->runtime;

snd_pcm_hw_constraint_minmax(substream->runtime, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, first_runtime->sample_bits, first_runtime->sample_bits);

Is SNDRV_PCM_HW_PARAM_SAMPLE_BITS for the logical or physical width? That is, if my first stream is playing S24_BE samples, do I restrict the second stream to 24 bits or 32 bits?