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/*----------------------------------------------------------------------------
*
* File:
* eas_wt_IPC_frame.h
*
* Contents and purpose:
* This module contains data definitions for the interprocessor
* communications framework for a split-architecture synthesizer.
*
* This sample version writes IPC data to a file that can be used
* as a test vector for the DSP simulator. For a real-time system
* the file I/O is replaced with an IPC protocol in the hardware.
*
* Synchronization with the DSP is accomplished at the API level,
* i.e. the host code should call EAS_Render when it is ready to
* buffer another block of data for transmission to the DSP.
*
* 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: 818 $
* $Date: 2007-08-02 15:19:41 -0700 (Thu, 02 Aug 2007) $
*----------------------------------------------------------------------------
*/
#ifndef _EAS_WT_IPC_FRAME_H
#define _EAS_WT_IPC_FRAME_H
/*----------------------------------------------------------------------------
* S_WT_FRAME
*
* This structure contains the common parameters that are updated
*for each frame of audio.
*----------------------------------------------------------------------------
*/
typedef struct s_wt_frame_tag
{
EAS_I32 gainTarget;
EAS_I32 phaseIncrement;
#if defined(_FILTER_ENABLED)
EAS_I32 k;
EAS_I32 b1;
EAS_I32 b2;
#endif
} S_WT_FRAME;
/*----------------------------------------------------------------------------
* S_WT_CONFIG
*
* This structure contains state data for the wavetable engine
*----------------------------------------------------------------------------
*/
typedef struct s_wt_config_tag
{
EAS_U32 loopEnd; /* points to last PCM sample (not 1 beyond last) */
EAS_U32 loopStart; /* points to first sample at start of loop */
EAS_U32 phaseAccum; /* current sample, integer portion of phase */
#if (NUM_OUTPUT_CHANNELS == 2)
EAS_I16 gainLeft; /* left channel gain */
EAS_I16 gainRight; /* right channel gain */
#endif
EAS_I16 gain; /* current voice gain */
} S_WT_CONFIG;
#endif
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