LPC_TYPE_U        198 libavcodec/lpc.h             lpc[    j] = f + (LPC_TYPE_U)AAC_MUL26(r, b);
LPC_TYPE_U        199 libavcodec/lpc.h             lpc[i-1-j] = b + (LPC_TYPE_U)AAC_MUL26(r, f);