[alsa-devel] How to Configure Appropriate runtime->hw in ALSA Driver

[Clemens Ladisch]

Azizul Hakim wrote:
> What is the best way to set the *runtime->hw* parameter in ALSA driver.

Set it to the capabilities of your hardware.

> From sample ALSA driver tutorial I understand we have to declare a
> *structure snd_pcm_hardware*  where we define all sound parameters
> like *STEREO/MONO,
> RATES* etc. Now at run time we can play sound files of different
> parameters. How ALSA behaves if the audio file parameters doesn't match
> with the *structure_snd_pcm_hardware* parameters?

Applications are not able to set unsupported parameter values.

However, alsa-lib can automatically convert rates/formats.

> If we want our driver to play any sound file

Your driver is supposed to driver your hardware.
What would you do with an unsupported format?


Regards,
Clemens