SDPCM_CHANNEL_SHIFT
ret = (u8)((hdrvalue & SDPCM_CHANNEL_MASK) >> SDPCM_CHANNEL_SHIFT);
rd->channel = (swheader & SDPCM_CHANNEL_MASK) >> SDPCM_CHANNEL_SHIFT;
hdrval |= (hd_info->channel << SDPCM_CHANNEL_SHIFT) &