67 lines
1.8 KiB
C++
Executable File
67 lines
1.8 KiB
C++
Executable File
/*
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AudioGeneratorRTTTL
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Audio output generator that plays RTTTL (Nokia ringtones)
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Based on the Rtttl Arduino library by James BM, https://github.com/spicajames/Rtttl
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Based on the gist from Daniel Hall https://gist.github.com/smarthall/1618800
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Copyright (C) 2018 Earle F. Philhower, III
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _AUDIOGENERATORRTTTL_H
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#define _AUDIOGENERATORRTTTL_H
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#include "AudioGenerator.h"
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class AudioGeneratorRTTTL : public AudioGenerator
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{
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public:
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AudioGeneratorRTTTL();
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virtual ~AudioGeneratorRTTTL() override;
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virtual bool begin(AudioFileSource *source, AudioOutput *output) override;
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virtual bool loop() override;
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virtual bool stop() override;
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virtual bool isRunning() override;
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void SetRate(uint16_t hz) { rate = hz; }
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private:
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bool SkipWhitespace();
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bool ReadInt(int *dest);
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bool ParseHeader();
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bool GetNextNote();
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protected:
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uint16_t rate;
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// We copy the entire tiny song to a buffer for easier access
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char *buff;
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int len;
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int ptr;
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// Song-global settings
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int defaultDuration;
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int defaultOctave;
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int wholeNoteMS;
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// The note we're currently playing
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int ttlSamplesPerWaveFP10;
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int ttlSamples;
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int samplesSent;
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};
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#endif
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