struct btr_node *btrn = fn->btrn;
size_t k, n = frame->header.blocksize;
unsigned channels = FLAC__stream_decoder_get_channels(decoder);
struct btr_node *btrn = fn->btrn;
size_t k, n = frame->header.blocksize;
unsigned channels = FLAC__stream_decoder_get_channels(decoder);