mirror of https://github.com/arendst/Tasmota.git
62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
/*
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AudioGeneratorWAV
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Audio output generator that reads 8 and 16-bit WAV files
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Copyright (C) 2017 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 _AUDIOGENERATORWAV_H
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#define _AUDIOGENERATORWAV_H
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#include "AudioGenerator.h"
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class AudioGeneratorWAV : public AudioGenerator
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{
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public:
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AudioGeneratorWAV();
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virtual ~AudioGeneratorWAV() 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 SetBufferSize(int sz) { buffSize = sz; }
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private:
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bool ReadU32(uint32_t *dest) { return file->read(reinterpret_cast<uint8_t*>(dest), 4); }
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bool ReadU16(uint16_t *dest) { return file->read(reinterpret_cast<uint8_t*>(dest), 2); }
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bool ReadU8(uint8_t *dest) { return file->read(reinterpret_cast<uint8_t*>(dest), 1); }
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bool GetBufferedData(int bytes, void *dest);
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bool ReadWAVInfo();
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protected:
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// WAV info
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uint16_t channels;
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uint32_t sampleRate;
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uint16_t bitsPerSample;
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uint32_t availBytes;
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// We need to buffer some data in-RAM to avoid doing 1000s of small reads
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uint32_t buffSize;
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uint8_t *buff;
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uint16_t buffPtr;
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uint16_t buffLen;
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};
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#endif
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