| /* |
| ** Copyright 2003-2010, VisualOn, Inc. |
| ** |
| ** Licensed under the Apache License, Version 2.0 (the "License"); |
| ** you may not use this file except in compliance with the License. |
| ** You may obtain a copy of the License at |
| ** |
| ** http://www.apache.org/licenses/LICENSE-2.0 |
| ** |
| ** Unless required by applicable law or agreed to in writing, software |
| ** distributed under the License is distributed on an "AS IS" BASIS, |
| ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| ** See the License for the specific language governing permissions and |
| ** limitations under the License. |
| */ |
| |
| /*********************************************************************** |
| * File: lag_wind.c * |
| * * |
| * Description: Lag_windows on autocorrelations * |
| * r[i] *= lag_wind[i] * |
| * * |
| ************************************************************************/ |
| |
| #include "typedef.h" |
| #include "basic_op.h" |
| #include "oper_32b.h" |
| #include "lag_wind.tab" |
| |
| |
| void Lag_window( |
| Word16 r_h[], /* (i/o) : Autocorrelations (msb) */ |
| Word16 r_l[] /* (i/o) : Autocorrelations (lsb) */ |
| ) |
| { |
| Word32 i; |
| Word32 x; |
| |
| for (i = 1; i <= M; i++) |
| { |
| x = Mpy_32(r_h[i], r_l[i], volag_h[i - 1], volag_l[i - 1]); |
| r_h[i] = x >> 16; |
| r_l[i] = (x & 0xffff)>>1; |
| } |
| return; |
| } |
| |
| |
| |