[alsa-devel] S24_LE Mode for USB Driver

Hi All,

It looks like the parse_audio_format_i_type function at line 2369 of usbaudio.c (linux v2.6.23) doesn't support the case where bSubframeSize (fmt[5]) = 4 bytes and bBitResolution (fmt[6]) = 24 bits, which should correspond to a S24_LE (or BE) type. I'm developing a new USD DAC which supports this mode (24-bit sample in a 4 byte package). Right now Linux sends me S32_LE formated data, which is wrong. Would it be possible to expand this function to support S24_LE/BE? It would only require adding a few lines of code.

Thanks! Charles