83 lines
2.9 KiB
C
83 lines
2.9 KiB
C
/*----------------------------------------------------------------------------
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*
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* File:
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* eas_wt_IPC_frame.h
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*
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* Contents and purpose:
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* This module contains data definitions for the interprocessor
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* communications framework for a split-architecture synthesizer.
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*
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* This sample version writes IPC data to a file that can be used
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* as a test vector for the DSP simulator. For a real-time system
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* the file I/O is replaced with an IPC protocol in the hardware.
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*
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* Synchronization with the DSP is accomplished at the API level,
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* i.e. the host code should call EAS_Render when it is ready to
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* buffer another block of data for transmission to the DSP.
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*
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* Copyright Sonic Network Inc. 2005
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*----------------------------------------------------------------------------
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* Revision Control:
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* $Revision: 818 $
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* $Date: 2007-08-02 15:19:41 -0700 (Thu, 02 Aug 2007) $
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*----------------------------------------------------------------------------
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*/
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#ifndef _EAS_WT_IPC_FRAME_H
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#define _EAS_WT_IPC_FRAME_H
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/*----------------------------------------------------------------------------
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* S_WT_FRAME
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*
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* This structure contains the common parameters that are updated
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*for each frame of audio.
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*----------------------------------------------------------------------------
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*/
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typedef struct s_wt_frame_tag
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{
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EAS_I32 gainTarget;
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EAS_I32 phaseIncrement;
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#if defined(_FILTER_ENABLED)
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EAS_I32 k;
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EAS_I32 b1;
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EAS_I32 b2;
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#endif
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} S_WT_FRAME;
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/*----------------------------------------------------------------------------
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* S_WT_CONFIG
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*
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* This structure contains state data for the wavetable engine
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*----------------------------------------------------------------------------
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*/
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typedef struct s_wt_config_tag
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{
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EAS_U32 loopEnd; /* points to last PCM sample (not 1 beyond last) */
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EAS_U32 loopStart; /* points to first sample at start of loop */
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EAS_U32 phaseAccum; /* current sample, integer portion of phase */
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#if (NUM_OUTPUT_CHANNELS == 2)
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EAS_I16 gainLeft; /* left channel gain */
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EAS_I16 gainRight; /* right channel gain */
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#endif
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EAS_I16 gain; /* current voice gain */
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} S_WT_CONFIG;
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#endif
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