69 lines
1.9 KiB
C++
Executable File
69 lines
1.9 KiB
C++
Executable File
/*
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AudioGeneratorMP3
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Wrap libmad MP3 library to play audio
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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 _AUDIOGENERATORMP3_H
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#define _AUDIOGENERATORMP3_H
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#include "AudioGenerator.h"
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#include "libmad/config.h"
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#include "libmad/mad.h"
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class AudioGeneratorMP3 : public AudioGenerator
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{
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public:
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AudioGeneratorMP3();
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AudioGeneratorMP3(void *preallocateSpace, int preallocateSize);
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virtual ~AudioGeneratorMP3() 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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protected:
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void *preallocateSpace;
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int preallocateSize;
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const int buffLen = 0x600; // Slightly larger than largest MP3 frame
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unsigned char *buff;
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int lastReadPos;
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int lastBuffLen;
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unsigned int lastRate;
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int lastChannels;
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// Decoding bits
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bool madInitted;
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struct mad_stream *stream;
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struct mad_frame *frame;
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struct mad_synth *synth;
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int samplePtr;
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int nsCount;
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int nsCountMax;
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// The internal helpers
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enum mad_flow ErrorToFlow();
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enum mad_flow Input();
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bool DecodeNextFrame();
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bool GetOneSample(int16_t sample[2]);
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};
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#endif
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