67 lines
2.1 KiB
C++
Executable File
67 lines
2.1 KiB
C++
Executable File
/*
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AudioGeneratorTalkie
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Audio output generator that speaks using the LPC code in old TI speech chips
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Output is locked at 8khz as that's that the hardcoded LPC coefficients are built around
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Based on the Talkie Arduino library by Peter Knight, https://github.com/going-digital/Talkie
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Copyright (C) 2020 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 _AUDIOGENERATORTALKIE_H
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#define _AUDIOGENERATORTALKIE_H
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#include "AudioGenerator.h"
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class AudioGeneratorTalkie : public AudioGenerator
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{
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public:
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AudioGeneratorTalkie();
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virtual ~AudioGeneratorTalkie() 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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bool say(const uint8_t *data, size_t len, bool async = false);
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protected:
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// The data stream we're playing
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uint8_t *buff;
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// Codeword stream handlers
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uint8_t *ptrAddr;
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uint8_t ptrBit;
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bool lastFrame;
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bool genOneFrame(); // Fill up one frame's worth of data, returns if this is the last frame
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int16_t genOneSample(); // Generate one sample of a frame
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// Utilities
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uint8_t rev(uint8_t a);
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uint8_t getBits(uint8_t bits);
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// Synthesizer state
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uint8_t synthPeriod;
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uint16_t synthEnergy;
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int16_t synthK1, synthK2;
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int8_t synthK3, synthK4, synthK5, synthK6, synthK7, synthK8, synthK9, synthK10;
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int frameLeft;
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};
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#endif
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