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package com.sun.media.sound;

import java.io.IOException;
import java.io.InputStream;

import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioFormat.Encoding;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.UnsupportedAudioFileException;

Floating-point encoded (format 3) WAVE file loader.
Author:Karl Helgason
/** * Floating-point encoded (format 3) WAVE file loader. * * @author Karl Helgason */
public final class WaveFloatFileReader extends SunFileReader { @Override StandardFileFormat getAudioFileFormatImpl(final InputStream stream) throws UnsupportedAudioFileException, IOException { RIFFReader riffiterator = new RIFFReader(stream); if (!riffiterator.getFormat().equals("RIFF")) throw new UnsupportedAudioFileException(); if (!riffiterator.getType().equals("WAVE")) throw new UnsupportedAudioFileException(); boolean fmt_found = false; boolean data_found = false; int channels = 1; long samplerate = 1; int framesize = 1; int bits = 1; long dataSize = 0; while (riffiterator.hasNextChunk()) { RIFFReader chunk = riffiterator.nextChunk(); if (chunk.getFormat().equals("fmt ")) { fmt_found = true; int format = chunk.readUnsignedShort(); if (format != WaveFileFormat.WAVE_FORMAT_IEEE_FLOAT) { throw new UnsupportedAudioFileException(); } channels = chunk.readUnsignedShort(); samplerate = chunk.readUnsignedInt(); /* framerate = */chunk.readUnsignedInt(); framesize = chunk.readUnsignedShort(); bits = chunk.readUnsignedShort(); } if (chunk.getFormat().equals("data")) { dataSize = chunk.getSize(); data_found = true; break; } } if (!fmt_found || !data_found) { throw new UnsupportedAudioFileException(); } AudioFormat audioformat = new AudioFormat( Encoding.PCM_FLOAT, samplerate, bits, channels, framesize, samplerate, false); return new StandardFileFormat(AudioFileFormat.Type.WAVE, audioformat, dataSize / audioformat.getFrameSize()); } @Override public AudioInputStream getAudioInputStream(final InputStream stream) throws UnsupportedAudioFileException, IOException { final StandardFileFormat format = getAudioFileFormat(stream); final AudioFormat af = format.getFormat(); final long length = format.getLongFrameLength(); // we've got everything, the stream is supported and it is at the // beginning of the header, so find the data chunk again and return an // AudioInputStream final RIFFReader riffiterator = new RIFFReader(stream); while (riffiterator.hasNextChunk()) { RIFFReader chunk = riffiterator.nextChunk(); if (chunk.getFormat().equals("data")) { return new AudioInputStream(chunk, af, length); } } throw new UnsupportedAudioFileException(); } }