• Daniel Mack's avatar
    ALSA: snd-usb: add support for bit-reversed byte formats · 44dcbbb1
    Daniel Mack authored
    There is quite some confusion around the bit-ordering in DSD samples,
    and no general agreement that defines whether hardware is supposed to
    expect the oldest sample in the MSB or the LSB of a byte.
    
    ALSA will hence set the rule that on the software API layer, bytes
    always carry the oldest bit in the most significant bit of a byte, and
    the driver has to translate that at runtime in order to match the
    hardware layout.
    
    This patch adds support for this by adding a boolean flag to the
    audio format struct.
    Signed-off-by: default avatarDaniel Mack <zonque@gmail.com>
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    44dcbbb1
pcm.c 42.6 KB