66 lines
2.2 KiB
C++
Executable file
66 lines
2.2 KiB
C++
Executable file
/*
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* Copyright (c) 2018 John-Michael Reed
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* bleeplabs.com
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "AudioStream.h"
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class AudioEffectGranular : public AudioStream
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{
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public:
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AudioEffectGranular(void): AudioStream(1,inputQueueArray) { }
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void begin(int16_t *sample_bank_def, int16_t max_len_def);
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void setSpeed(float ratio) {
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if (ratio < 0.125) ratio = 0.125;
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else if (ratio > 8.0) ratio = 8.0;
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playpack_rate = ratio * 65536.0 + 0.499;
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}
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void beginFreeze(float grain_length) {
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if (grain_length <= 0.0) return;
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beginFreeze_int(grain_length * (AUDIO_SAMPLE_RATE_EXACT * 0.001) + 0.5);
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}
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void beginPitchShift(float grain_length) {
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if (grain_length <= 0.0) return;
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beginPitchShift_int(grain_length * (AUDIO_SAMPLE_RATE_EXACT * 0.001) + 0.5);
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}
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void stop();
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virtual void update(void);
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private:
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void beginFreeze_int(int grain_samples);
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void beginPitchShift_int(int grain_samples);
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audio_block_t *inputQueueArray[1];
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int16_t *sample_bank;
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uint32_t playpack_rate;
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uint32_t accumulator;
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int16_t max_sample_len;
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int16_t write_head;
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int16_t read_head;
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int16_t grain_mode;
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int16_t freeze_len;
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int16_t prev_input;
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int16_t glitch_len;
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bool allow_len_change;
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bool sample_loaded;
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bool write_en;
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bool sample_req;
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};
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