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- /* Audio Library for Teensy 3.X
- * Copyright (c) 2014, Pete (El Supremo)
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
- #ifndef synth_tonesweep_h_
- #define synth_tonesweep_h_
-
- #include <core/Arduino.h>
- #include <core/AudioStream.h>
-
- // A u d i o S y n t h T o n e S w e e p
- // Written by Pete (El Supremo) Feb 2014
-
- class AudioSynthToneSweep : public AudioStream
- {
- public:
- AudioSynthToneSweep(void) :
- AudioStream(0,NULL), sweep_busy(0)
- { }
-
- boolean play(float t_amp,int t_lo,int t_hi,float t_time);
- virtual void update(void);
- unsigned char isPlaying(void);
- float read(void) {
- __disable_irq();
- uint64_t freq = tone_freq;
- unsigned char busy = sweep_busy;
- __enable_irq();
- if (!busy) return 0.0f;
- return (float)(freq >> 32);
- }
-
- private:
- short tone_amp;
- unsigned int tone_lo;
- unsigned int tone_hi;
- uint64_t tone_freq;
- uint64_t tone_phase;
- uint64_t tone_incr;
- int tone_sign;
- unsigned char sweep_busy;
- };
-
- #endif
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