| /* ------------------------------------------------------------------ |
| * Copyright (C) 1998-2009 PacketVideo |
| * |
| * 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. |
| * ------------------------------------------------------------------- |
| */ |
| /**************************************************************************************** |
| Portions of this file are derived from the following 3GPP standard: |
| |
| 3GPP TS 26.173 |
| ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec |
| Available from http://www.3gpp.org |
| |
| (C) 2007, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) |
| Permission to distribute, modify and use this file under the standard license |
| terms listed above has been obtained from the copyright holder. |
| ****************************************************************************************/ |
| /* |
| ------------------------------------------------------------------------------ |
| |
| |
| |
| Filename: median5.cpp |
| |
| Date: 05/08/2007 |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| |
| Description: |
| |
| ------------------------------------------------------------------------------ |
| INPUT AND OUTPUT DEFINITIONS |
| |
| INPUT |
| X[-2:2] 16-bit integers. |
| |
| RETURN VALUE |
| The median of {X[-2], X[-1],..., X[2]}. |
| |
| ------------------------------------------------------------------------------ |
| FUNCTION DESCRIPTION |
| |
| Returns the median of the set {X[-2], X[-1],..., X[2]}, |
| whose elements are 16-bit integers. |
| |
| ------------------------------------------------------------------------------ |
| REQUIREMENTS |
| |
| |
| ------------------------------------------------------------------------------ |
| REFERENCES |
| |
| ------------------------------------------------------------------------------ |
| PSEUDO-CODE |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; INCLUDES |
| ----------------------------------------------------------------------------*/ |
| |
| #include "pv_amr_wb_type_defs.h" |
| #include "pvamrwbdecoder_basic_op.h" |
| #include "pvamrwbdecoder_acelp.h" |
| #include "pvamrwb_math_op.h" |
| |
| /*---------------------------------------------------------------------------- |
| ; MACROS |
| ; Define module specific macros here |
| ----------------------------------------------------------------------------*/ |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; DEFINES |
| ; Include all pre-processor statements here. Include conditional |
| ; compile variables also. |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; LOCAL FUNCTION DEFINITIONS |
| ; Function Prototype declaration |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; LOCAL STORE/BUFFER/POINTER DEFINITIONS |
| ; Variable declaration - defined here and used outside this module |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; EXTERNAL FUNCTION REFERENCES |
| ; Declare functions defined elsewhere and referenced in this module |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES |
| ; Declare variables used in this module but defined elsewhere |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; FUNCTION CODE |
| ----------------------------------------------------------------------------*/ |
| |
| int16 median5(int16 x[]) |
| { |
| int16 x1, x2, x3, x4, x5; |
| int16 tmp; |
| |
| x1 = x[-2]; |
| x2 = x[-1]; |
| x3 = x[0]; |
| x4 = x[1]; |
| x5 = x[2]; |
| |
| |
| |
| if (x2 < x1) |
| { |
| tmp = x1; |
| x1 = x2; |
| x2 = tmp; |
| } |
| if (x3 < x1) |
| { |
| tmp = x1; |
| x1 = x3; |
| x3 = tmp; |
| } |
| if (x4 < x1) |
| { |
| tmp = x1; |
| x1 = x4; |
| x4 = tmp; |
| } |
| if (x5 < x1) |
| { |
| x5 = x1; |
| } |
| if (x3 < x2) |
| { |
| tmp = x2; |
| x2 = x3; |
| x3 = tmp; |
| } |
| if (x4 < x2) |
| { |
| tmp = x2; |
| x2 = x4; |
| x4 = tmp; |
| } |
| if (x5 < x2) |
| { |
| x5 = x2; |
| } |
| if (x4 < x3) |
| { |
| x3 = x4; |
| } |
| if (x5 < x3) |
| { |
| x3 = x5; |
| } |
| return (x3); |
| } |
| |
| |