mirror of https://github.com/arendst/Tasmota.git
58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
/*
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AudioOutput
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Base class of an audio output player
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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 _AUDIOOUTPUTNULLSLOW_H
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#define _AUDIOOUTPUTNULLSLOW_H
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#include "AudioOutput.h"
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class AudioOutputNullSlow : public AudioOutput
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{
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public:
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AudioOutputNullSlow() { };
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~AudioOutputNullSlow() {};
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virtual bool begin() { samples = 0; startms = millis(); return true; }
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virtual bool ConsumeSample(int16_t sample[2]) {
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// return false (= output buffer full)
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// sometimes to let the main loop running
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constexpr int everylog2 = 10;
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if ((++samples & ((1<<everylog2)-1)) == 0) {
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if (hertz > 0) {
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// simulate real time
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delay(1000/(hertz >> everylog2));
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}
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return false;
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}
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return true;
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}
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virtual bool stop() { endms = millis(); return true; };
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unsigned long GetMilliseconds() { return endms - startms; }
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int GetSamples() { return samples; }
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int GetFrequency() { return hertz; }
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protected:
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unsigned long startms;
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unsigned long endms;
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int samples;
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};
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#endif
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