mirror of
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60 lines
2.0 KiB
Java
60 lines
2.0 KiB
Java
/*
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* *****************************************************************************
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* Copyright (C) 2014-2022 Dennis Sheirer
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*
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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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*
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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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*
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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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*/
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package io.github.dsheirer.audio.convert;
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import java.util.Arrays;
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import java.util.ArrayList;
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import java.util.List;
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import org.apache.commons.math3.util.FastMath;
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public class MP3FrameTools {
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private MP3FrameTools() {}
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/**
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* Split MP3 audio at frame boundaries
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* @param input byte array of audio
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* @return list of byte arrays containing audio frames
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*/
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public static MP3AudioFrames split(byte[] input)
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{
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List<byte[]> mp3Frames = new ArrayList<>();
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int audioDuration = 0;
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int offset = 0;
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while(offset < input.length)
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{
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if(MP3Header.hasSync(input, offset))
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{
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int framelen = MP3Header.getFrameLength(input, offset);
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mp3Frames.add(Arrays.copyOfRange(input, offset, offset + FastMath.min(framelen, input.length - offset)));
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audioDuration += MP3Header.getFrameDuration(input, offset);
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offset += framelen;
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}
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else
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{
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offset += 1;
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}
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}
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return new MP3AudioFrames(audioDuration, mp3Frames);
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}
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}
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