46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2006-2007 Adam Gashlin (hcs)
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* Copyright (C) 2004-2007 Shay Green (blargg)
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* Copyright (C) 2002 Brad Martin
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#if !SPC_NOECHO
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#ifndef SPC_DSP_ECHO_APPLY
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enum
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{
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FIR_BUF_CNT = FIR_BUF_HALF * 2 * 2,
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FIR_BUF_SIZE = FIR_BUF_CNT * sizeof ( int32_t ),
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FIR_BUF_ALIGN = FIR_BUF_SIZE,
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FIR_BUF_MASK = ~((FIR_BUF_ALIGN / 2) | (sizeof ( int32_t ) * 2 - 1))
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};
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/* Echo filter structure embedded in struct Spc_Dsp */
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struct echo_filter
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{
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/* fir_buf [i + 8] == fir_buf [i], to avoid wrap checking in FIR code */
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int pos; /* (0 to 7) */
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int buf [FIR_BUF_HALF * 2] [2];
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/* copy of echo FIR constants as int, for faster access */
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int coeff [VOICE_COUNT];
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};
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#endif /* SPC_DSP_ECHO_APPLY */
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#endif /* !SPC_NOECHO */
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