100 lines
3.4 KiB
C
100 lines
3.4 KiB
C
/****************************************************************************
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* apps/include/audioutils/fmsynth_op.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_OP_H
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#define __APPS_INCLUDE_AUDIOUTILS_FMSYNTH_OP_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <audioutils/fmsynth_eg.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define FMSYNTH_PI (0x10000)
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#define FMSYNTH_OPFUNC_SIN (0)
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#define FMSYNTH_OPFUNC_TRIANGLE (1)
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#define FMSYNTH_OPFUNC_SAWTOOTH (2)
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#define FMSYNTH_OPFUNC_SQUARE (3)
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#define FMSYNTH_OPFUNC_NUM (4)
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/****************************************************************************
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* Public Types
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****************************************************************************/
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typedef CODE int (*opfunc_t)(int theta);
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typedef struct fmsynth_op_s
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{
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FAR fmsynth_eg_t *eg;
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opfunc_t wavegen;
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struct fmsynth_op_s *cascadeop;
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struct fmsynth_op_s *parallelop;
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FAR int *feedback_ref;
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int feedback_val;
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int feedbackrate;
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int last_sigval;
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float freq_rate;
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float sound_freq;
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float delta_phase;
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float current_phase;
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} fmsynth_op_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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int fmsynthop_set_samplerate(int fs);
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FAR fmsynth_op_t *fmsynthop_create(void);
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void fmsynthop_delete(FAR fmsynth_op_t *op);
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int fmsynthop_select_opfunc(FAR fmsynth_op_t *op, int type);
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int fmsynthop_set_envelope(FAR fmsynth_op_t *op,
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FAR fmsynth_eglevels_t *levels);
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int fmsynthop_cascade_subop(FAR fmsynth_op_t *op,
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FAR fmsynth_op_t *subop);
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int fmsynthop_parallel_subop(FAR fmsynth_op_t *op,
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FAR fmsynth_op_t *subop);
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int fmsynthop_bind_feedback(FAR fmsynth_op_t *op,
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FAR fmsynth_op_t *subop, float ratio);
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int fmsynthop_update_feedback(FAR fmsynth_op_t *op);
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void fmsynthop_set_soundfreq(FAR fmsynth_op_t *op, float freq);
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void fmsynthop_set_soundfreqrate(FAR fmsynth_op_t *op, float rate);
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void fmsynthop_start(FAR fmsynth_op_t *op);
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void fmsynthop_stop(FAR fmsynth_op_t *op);
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int fmsynthop_operate(FAR fmsynth_op_t *op, int phase_time);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __APPS_INCLUDE_AUDIOUTILS_FMSYNTH_OP_H */
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