filt0250.h

来自「Ep93XX TionProV2 BSP」· C头文件 代码 · 共 41 行

//**********************************************************************
//                                                                      
// Filename: FILT0250.H
//                                                                      
// Description: Polyphase sample rate conversion filter with a ratio of 
//              0.25.
//
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Use of this source code is subject to the terms of the Cirrus end-user
// license agreement (EULA) under which you licensed this SOFTWARE PRODUCT.
// If you did not accept the terms of the EULA, you are not authorized to 
// use this source code. For a copy of the EULA, please see the 
// EULA.RTF on your install media.
//
// Copyright(c) Cirrus Logic Corporation 2005, All Rights Reserved                       
//                                                                      
//**********************************************************************

static const struct
{
    short sNumPolyPhases;
    short sSampleIncrement;
    short sNumTaps;
    short sUnused;
    short sCoefs[1][13];
} SRCFilter_0_25 =
{
    1,
    4,
    13,
    0,
    {
        {  -127,  -192,     0,  1224,  3699,  6375,  7546,
           6375,  3699,  1224,     0,  -192,  -127 }
    }
};