65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
/*
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AudioGeneratorAAC
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Audio output generator using the Helix AAC decoder
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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 _AUDIOGENERATORAAC_H
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#define _AUDIOGENERATORAAC_H
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#include "AudioGenerator.h"
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#include "libhelix-aac/aacdec.h"
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class AudioGeneratorAAC : public AudioGenerator
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{
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public:
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AudioGeneratorAAC();
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AudioGeneratorAAC(void *preallocateData, int preallocateSize);
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virtual ~AudioGeneratorAAC() 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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// Helix AAC decoder
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HAACDecoder hAACDecoder;
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// Input buffering
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const int buffLen = 1600;
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uint8_t *buff; //[1600]; // File buffer required to store at least a whole compressed frame
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int16_t buffValid;
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int16_t lastFrameEnd;
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bool FillBufferWithValidFrame(); // Read until we get a valid syncword and min(feof, 2048) butes in the buffer
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// Output buffering
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int16_t *outSample; //[1024 * 2]; // Interleaved L/R
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int16_t validSamples;
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int16_t curSample;
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// Each frame may change this if they're very strange, I guess
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unsigned int lastRate;
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int lastChannels;
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};
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#endif
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