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/*----------------------------------------------------------------------------
*
* File:
* eas_mixer.h
*
* Contents and purpose:
* This file contains the critical components of the mix engine that
* must be optimized for best performance.
*
* Copyright Sonic Network Inc. 2005
* 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: 706 $
* $Date: 2007-05-31 17:22:51 -0700 (Thu, 31 May 2007) $
*----------------------------------------------------------------------------
*/
#ifndef _EAS_MIXER_H
#define _EAS_MIXER_H
//3 dls: This module is in the midst of being converted from a synth
//3 specific module to a general purpose mix engine
#define MIX_FLAGS_STEREO_SOURCE 1
#define MIX_FLAGS_STEREO_OUTPUT 2
#define NUM_MIXER_GUARD_BITS 4
#include "eas_effects.h"
extern void SynthMasterGain( long *pInputBuffer, EAS_PCM *pOutputBuffer, EAS_U16 nGain, EAS_U16 nNumLoopSamples);
/*----------------------------------------------------------------------------
* EAS_MixEngineInit()
*----------------------------------------------------------------------------
* Purpose:
* Prepares the mix engine for work, allocates buffers, locates effects modules, etc.
*
* Inputs:
* pEASData - instance data
* pInstData - pointer to variable to receive instance data handle
*
* Outputs:
*
* Side Effects:
*
*----------------------------------------------------------------------------
*/
EAS_RESULT EAS_MixEngineInit (EAS_DATA_HANDLE pEASData);
/*----------------------------------------------------------------------------
* EAS_MixEnginePrep()
*----------------------------------------------------------------------------
* Purpose:
* Performs prep before synthesize a buffer of audio, such as clearing
* audio buffers, etc.
*
* Inputs:
* psEASData - pointer to overall EAS data structure
*
* Outputs:
*
* Side Effects:
*
*----------------------------------------------------------------------------
*/
void EAS_MixEnginePrep (EAS_DATA_HANDLE pEASData, EAS_I32 nNumSamplesToAdd);
/*----------------------------------------------------------------------------
* EAS_MixEnginePost
*----------------------------------------------------------------------------
* Purpose:
* This routine does the post-processing after all voices have been
* synthesized. It calls any sweeteners and does the final mixdown to
* the output buffer.
*
* Inputs:
*
* Outputs:
*
* Notes:
*----------------------------------------------------------------------------
*/
void EAS_MixEnginePost (EAS_DATA_HANDLE pEASData, EAS_I32 nNumSamplesToAdd);
/*----------------------------------------------------------------------------
* EAS_MixEngineShutdown()
*----------------------------------------------------------------------------
* Purpose:
* Shuts down effects modules and deallocates memory
*
* Inputs:
* pEASData - instance data
* pInstData - instance data handle
*
* Outputs:
*
* Side Effects:
*
*----------------------------------------------------------------------------
*/
EAS_RESULT EAS_MixEngineShutdown (EAS_DATA_HANDLE pEASData);
#ifdef UNIFIED_MIXER
/*----------------------------------------------------------------------------
* EAS_MixStream
*----------------------------------------------------------------------------
* Mix a 16-bit stream into a 32-bit buffer
*
* pInputBuffer 16-bit input buffer
* pMixBuffer 32-bit mix buffer
* numSamples number of samples to mix
* gainLeft initial gain left or mono
* gainRight initial gain right
* gainLeft left gain increment per sample
* gainRight right gain increment per sample
* flags bit 0 = stereo source
* bit 1 = stereo output
*----------------------------------------------------------------------------
*/
void EAS_MixStream (EAS_PCM *pInputBuffer, EAS_I32 *pMixBuffer, EAS_I32 numSamples, EAS_I32 gainLeft, EAS_I32 gainRight, EAS_I32 gainIncLeft, EAS_I32 gainIncRight, EAS_I32 flags);
#endif
#endif /* #ifndef _EAS_MIXER_H */
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