101 lines
3.1 KiB
C
101 lines
3.1 KiB
C
/****************************************************************************
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* apps/include/audioutils/fmsynth_eg.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __APPS_INCLUDE_AUDIOUTILS_FMSYNTH_EG_H
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#define __APPS_INCLUDE_AUDIOUTILS_FMSYNTH_EG_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <limits.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define FMSYNTH_MAX_EGLEVEL (SHRT_MAX / 8)
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#define EGSTATE_ATTACK (0)
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#define EGSTATE_DECAYBREAK (1)
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#define EGSTATE_DECAY (2)
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#define EGSTATE_SUSTAIN (3)
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#define EGSTATE_RELEASE (4)
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#define EGSTATE_RELEASED (5)
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#define EGSTATE_MAX (6)
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#define EGSTATE_NUM EGSTATE_RELEASED
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/****************************************************************************
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* Public Types
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****************************************************************************/
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struct fmsynth_eglevel_s
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{
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float level;
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int period_ms;
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};
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typedef struct fmsynth_eglevels_s
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{
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struct fmsynth_eglevel_s attack;
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struct fmsynth_eglevel_s decaybrk;
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struct fmsynth_eglevel_s decay;
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struct fmsynth_eglevel_s sustain;
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struct fmsynth_eglevel_s release;
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} fmsynth_eglevels_t;
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typedef struct fmsynth_egparam_s
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{
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int initval;
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int period;
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int diff2next;
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} fmsynth_egparam_t;
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typedef struct fmsynth_eg_s
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{
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int state;
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int state_counter;
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fmsynth_egparam_t state_params[EGSTATE_MAX];
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} fmsynth_eg_t;
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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FAR fmsynth_eg_t *fmsyntheg_create(void);
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void fmsyntheg_delete(FAR fmsynth_eg_t *eg);
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int fmsyntheg_set_param(FAR fmsynth_eg_t *eg,
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int fs, FAR fmsynth_eglevels_t *levels);
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void fmsyntheg_start(FAR fmsynth_eg_t *eg);
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void fmsyntheg_stop(FAR fmsynth_eg_t *eg);
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int fmsyntheg_operate(FAR fmsynth_eg_t *eg);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __APPS_INCLUDE_AUDIOUTILS_FMSYNTH_EG_H */
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