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/*----------------------------------------------------------------------------
*
* File:
* eas_wtsynth.h
*
* Contents and purpose:
* This file defines the interface for synthesizer engine
*
* Copyright Sonic Network Inc. 2004
* 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.
*
*----------------------------------------------------------------------------
* Revision Control:
* $Revision: 82 $
* $Date: 2006-07-10 11:45:19 -0700 (Mon, 10 Jul 2006) $
*----------------------------------------------------------------------------
*/
#ifndef _EAS_WTSYNTH_H
#define _EAS_WTSYNTH_H
#include "eas_sndlib.h"
#include "eas_wtengine.h"
/* adjust the filter cutoff frequency to the sample rate */
#if defined (_SAMPLE_RATE_8000)
#define FILTER_CUTOFF_FREQ_ADJUST 0
#elif defined (_SAMPLE_RATE_16000)
#define FILTER_CUTOFF_FREQ_ADJUST 1200
#elif defined (_SAMPLE_RATE_20000)
#define FILTER_CUTOFF_FREQ_ADJUST 1586
#elif defined (_SAMPLE_RATE_22050)
#define FILTER_CUTOFF_FREQ_ADJUST 1756
#elif defined (_SAMPLE_RATE_24000)
#define FILTER_CUTOFF_FREQ_ADJUST 1902
#elif defined (_SAMPLE_RATE_32000)
#define FILTER_CUTOFF_FREQ_ADJUST 2400
#elif defined (_SAMPLE_RATE_44100)
#define FILTER_CUTOFF_FREQ_ADJUST 2956
#elif defined (_SAMPLE_RATE_48000)
#define FILTER_CUTOFF_FREQ_ADJUST 3102
#else
#error "_SAMPLE_RATE_XXXXX must be defined to valid rate"
#endif
/* function prototypes */
void WT_UpdateLFO (S_LFO_CONTROL *pLFO, EAS_I16 phaseInc);
#if defined(_FILTER_ENABLED) || defined(DLS_SYNTHESIZER)
void WT_SetFilterCoeffs (S_WT_INT_FRAME *pIntFrame, EAS_I32 cutoff, EAS_I32 resonance);
#endif
#endif
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