/*
* TAudioFileReader.java
*
* This file is part of Tritonus: http://www.tritonus.org/
*/
/*
* Copyright (c) 1999 by Matthias Pfisterer
* Copyright (c) 2001 by Florian Bomers <http://www.bomers.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as published
* by the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
|<--- this code is formatted to fit into 80 columns --->|
*/
package org.tritonus.share.sampled.file;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.DataInputStream;
import java.io.InputStream;
import java.io.IOException;
import java.io.EOFException;
import java.net.URL;
import java.net.URLConnection;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.UnsupportedAudioFileException;
import javax.sound.sampled.spi.AudioFileReader;
import org.tritonus.share.TDebug;
/** Base class for audio file readers.
This is Tritonus' base class for classes that provide the facility
of detecting an audio file type and reading its header.
Classes should be derived from this class or one of its subclasses
rather than from javax.sound.sampled.spi.AudioFileReader.
@author Matthias Pfisterer
@author Florian Bomers
*/
public abstract class TAudioFileReader
extends AudioFileReader
{
private int m_nMarkLimit = -1;
private boolean m_bRereading;
protected TAudioFileReader(int nMarkLimit)
{
this(nMarkLimit, false);
}
protected TAudioFileReader(int nMarkLimit, boolean bRereading)
{
m_nMarkLimit = nMarkLimit;
m_bRereading = bRereading;
}
private int getMarkLimit()
{
return m_nMarkLimit;
}
private boolean isRereading()
{
return m_bRereading;
}
/** Get an AudioFileFormat object for a File.
This method calls getAudioFileFormat(InputStream, long).
Subclasses should not override this method unless there are
really severe reasons. Normally, it is sufficient to
implement getAudioFileFormat(InputStream, long).
@param file the file to read from.
@return an AudioFileFormat instance containing
information from the header of the file passed in.
*/
@Override
public AudioFileFormat getAudioFileFormat(File file)
throws UnsupportedAudioFileException, IOException
{
if (TDebug.TraceAudioFileReader) {TDebug.out("TAudioFileReader.getAudioFileFormat(File): begin (class: "+getClass().getSimpleName()+")"); }
long lFileLengthInBytes = file.length();
InputStream inputStream = new FileInputStream(file);
AudioFileFormat audioFileFormat = null;
try
{
audioFileFormat = getAudioFileFormat(inputStream, lFileLengthInBytes);
}
finally
{
inputStream.close();
}
if (TDebug.TraceAudioFileReader) {TDebug.out("TAudioFileReader.getAudioFileFormat(File): end"); }
return audioFileFormat;
}
/** Get an AudioFileFormat object for a URL.
This method calls getAudioFileFormat(InputStream, long).
Subclasses should not override this method unless there are
really severe reasons. Normally, it is sufficient to
implement getAudioFileFormat(InputStream, long).
@param url the URL to read from.
@return an AudioFileFormat instance containing
information from the header of the URL passed in.
*/
@Override
public AudioFileFormat getAudioFileFormat(URL url)
throws UnsupportedAudioFileException, IOException
{
if (TDebug.TraceAudioFileReader) {TDebug.out("TAudioFileReader.getAudioFileFormat(URL): begin (class: "+getClass().getSimpleName()+")"); }
long lFileLengthInBytes = getDataLength(url);
InputStream inputStream = url.openStream();
AudioFileFormat audioFileFormat = null;
try
{
audioFileFormat = getAudioFileFormat(inputStream, lFileLengthInBytes);
}
finally
{
inputStream.close();
}
if (TDebug.TraceAudioFileReader) {TDebug.out("TAudioFileReader.getAudioFileFormat(URL): end"); }
return audioFileFormat;
}
/** Get an AudioFileFormat object for an InputStream.
This method calls getAudioFileFormat(InputStream, long).
Subclasses should not override this method unless there are
really severe reasons. Normally, it is sufficient to
implement getAudioFileFormat(InputStream, long).
@param inputStream the stream to read from.
@return an AudioFileFormat instance containing
information from the header of the stream passed in.
*/
@Override
public AudioFileFormat getAudioFileFormat(InputStream inputStream)
throws UnsupportedAudioFileException, IOException
{
if (TDebug.TraceAudioFileReader) {TDebug.out("TAudioFileReader.getAudioFileFormat(InputStream): begin (class: "+getClass().getSimpleName()+")"); }
long lFileLengthInBytes = AudioSystem.NOT_SPECIFIED;
if (!inputStream.markSupported()) {
inputStream = new BufferedInputStream(inputStream, getMarkLimit());
}
inputStream.mark(getMarkLimit());
AudioFileFormat audioFileFormat = null;
try
{
audioFileFormat = getAudioFileFormat(inputStream, lFileLengthInBytes);
}
finally
{
/* TODO: required semantics is unclear: should reset()
be executed only when there is an exception or
should it be done always?
*/
inputStream.reset();
}
if (TDebug.TraceAudioFileReader) {TDebug.out("TAudioFileReader.getAudioFileFormat(InputStream): end"); }
return audioFileFormat;
}
/**
* Get an AudioFileFormat (internal implementation). Subclasses must
* implement this method in a way specific to the file format they handle.
* Note that depending on the implementation of this method, you should or
* should not override getAudioInputStream(InputStream, long), too (see
* comment there).
*
* @param inputStream The InputStream to read from. It should be tested if
* it is markable. If not, and it is re-reading, wrap it into a
* BufferedInputStream with getMarkLimit() size.
* @param lFileLengthInBytes The size of the originating file, if known. If
* it isn't known, AudioSystem.NOT_SPECIFIED should be passed.
* This value may be used for byteLength in AudioFileFormat, if
* this value can't be derived from the informmation in the file
* header.
* @return an AudioFileFormat instance containing information from the
* header of the stream passed in as inputStream.
*/
protected abstract AudioFileFormat getAudioFileFormat(
InputStream inputStream, long lFileLengthInBytes)
throws UnsupportedAudioFileException, IOException;
/** Get an AudioInputStream object for a file.
This method calls getAudioInputStream(InputStream, long).
Subclasses should not override this method unless there are
really severe reasons. Normally, it is sufficient to
implement getAudioFileFormat(InputStream, long) and perhaps
override getAudioInputStream(InputStream, long).
@param file the File object to read from.
@return an AudioInputStream instance containing
the audio data from this file.
*/
@Override
public AudioInputStream getAudioInputStream(File file)
throws UnsupportedAudioFileException, IOException
{
if (TDebug.TraceAudioFileReader) {TDebug.out("TAudioFileReader.getAudioInputStream(File): begin (class: "+getClass().getSimpleName()+")"); }
long lFileLengthInBytes = file.length();
InputStream inputStream = new FileInputStream(file);
AudioInputStream audioInputStream = null;
try
{
audioInputStream = getAudioInputStream(inputStream, lFileLengthInBytes);
}
catch (UnsupportedAudioFileException e)
{
inputStream.close();
throw e;
}
catch (IOException e)
{
inputStream.close();
throw e;
}
if (TDebug.TraceAudioFileReader) {TDebug.out("TAudioFileReader.getAudioInputStream(File): end"); }
return audioInputStream;
}
/** Get an AudioInputStream object for a URL.
This method calls getAudioInputStream(InputStream, long).
Subclasses should not override this method unless there are
really severe reasons. Normally, it is sufficient to
implement getAudioFileFormat(InputStream, long) and perhaps
override getAudioInputStream(InputStream, long).
@param url the URL to read from.
@return an AudioInputStream instance containing
the audio data from this URL.
*/
@Override
public AudioInputStream getAudioInputStream(URL url)
throws UnsupportedAudioFileException, IOException
{
if (TDebug.TraceAudioFileReader) {TDebug.out("TAudioFileReader.getAudioInputStream(URL): begin (class: "+getClass().getSimpleName()+")"); }
long lFileLengthInBytes = getDataLength(url);
InputStream inputStream = url.openStream();
AudioInputStream audioInputStream = null;
try
{
audioInputStream = getAudioInputStream(inputStream, lFileLengthInBytes);
}
catch (UnsupportedAudioFileException e)
{
inputStream.close();
throw e;
}
catch (IOException e)
{
inputStream.close();
throw e;
}
if (TDebug.TraceAudioFileReader) {TDebug.out("TAudioFileReader.getAudioInputStream(URL): end"); }
return audioInputStream;
}
/** Get an AudioInputStream object for an InputStream.
This method calls getAudioInputStream(InputStream, long).
Subclasses should not override this method unless there are
really severe reasons. Normally, it is sufficient to
implement getAudioFileFormat(InputStream, long) and perhaps
override getAudioInputStream(InputStream, long).
@param inputStream the stream to read from.
@return an AudioInputStream instance containing
the audio data from this stream.
*/
@Override
public AudioInputStream getAudioInputStream(InputStream inputStream)
throws UnsupportedAudioFileException, IOException
{
if (TDebug.TraceAudioFileReader) {TDebug.out("TAudioFileReader.getAudioInputStream(InputStream): begin (class: "+getClass().getSimpleName()+")"); }
long lFileLengthInBytes = AudioSystem.NOT_SPECIFIED;
AudioInputStream audioInputStream = null;
if (!inputStream.markSupported()) {
inputStream = new BufferedInputStream(inputStream, getMarkLimit());
}
inputStream.mark(getMarkLimit());
try
{
audioInputStream = getAudioInputStream(inputStream, lFileLengthInBytes);
}
catch (UnsupportedAudioFileException e)
{
inputStream.reset();
throw e;
}
catch (IOException e)
{
try {
inputStream.reset();
} catch (IOException e2) {
if (e2.getCause() == null) {
e2.initCause(e);
throw e2;
}
}
throw e;
}
if (TDebug.TraceAudioFileReader) {TDebug.out("TAudioFileReader.getAudioInputStream(InputStream): end"); }
return audioInputStream;
}
/**
* Get an AudioInputStream (internal implementation). This implementation
* calls getAudioFileFormat() with the same arguments as passed in here.
* Then, it constructs an AudioInputStream instance. This instance takes the
* passed inputStream in the state it is left after getAudioFileFormat() did
* its work. In other words, the implementation here assumes that
* getAudioFileFormat() reads the entire header up to a position exactly
* where the audio data starts. If this can't be realized for a certain
* format, this method should be overridden.
*
* @param inputStream The InputStream to read from. It should be tested if
* it is markable. If not, and it is re-reading, wrap it into a
* BufferedInputStream with getMarkLimit() size.
* @param lFileLengthInBytes The size of the originating file, if known. If
* it isn't known, AudioSystem.NOT_SPECIFIED should be passed.
* This value may be used for byteLength in AudioFileFormat, if
* this value can't be derived from the information in the file
* header.
*/
protected AudioInputStream getAudioInputStream(InputStream inputStream,
long lFileLengthInBytes) throws UnsupportedAudioFileException,
IOException {
if (TDebug.TraceAudioFileReader) {
TDebug.out("TAudioFileReader.getAudioInputStream(InputStream, long): begin (class: "
+ getClass().getSimpleName() + ")");
}
if (isRereading()) {
if (!inputStream.markSupported()) {
inputStream = new BufferedInputStream(inputStream,
getMarkLimit());
}
inputStream.mark(getMarkLimit());
}
AudioFileFormat audioFileFormat = getAudioFileFormat(inputStream,
lFileLengthInBytes);
if (isRereading()) {
inputStream.reset();
}
AudioInputStream audioInputStream = new AudioInputStream(inputStream,
audioFileFormat.getFormat(), audioFileFormat.getFrameLength());
if (TDebug.TraceAudioFileReader) {
TDebug.out("TAudioFileReader.getAudioInputStream(InputStream, long): end");
}
return audioInputStream;
}
protected static int calculateFrameSize(int nSampleSize, int nNumChannels)
{
return ((nSampleSize + 7) / 8) * nNumChannels;
}
private static long getDataLength(URL url)
throws IOException
{
long lFileLengthInBytes = AudioSystem.NOT_SPECIFIED;
URLConnection connection = url.openConnection();
connection.connect();
int nLength = connection.getContentLength();
if (nLength > 0)
{
lFileLengthInBytes = nLength;
}
return lFileLengthInBytes;
}
public static int readLittleEndianInt(InputStream is)
throws IOException
{
int b0 = is.read();
int b1 = is.read();
int b2 = is.read();
int b3 = is.read();
if ((b0 | b1 | b2 | b3) < 0)
{
throw new EOFException();
}
return (b3 << 24) + (b2 << 16) + (b1 << 8) + (b0 << 0);
}
public static short readLittleEndianShort(InputStream is)
throws IOException
{
int b0 = is.read();
int b1 = is.read();
if ((b0 | b1) < 0)
{
throw new EOFException();
}
return (short) ((b1 << 8) + (b0 << 0));
}
/*
* C O N V E R T F R O M I E E E E X T E N D E D
*/
/*
* Copyright (C) 1988-1991 Apple Computer, Inc.
* All rights reserved.
*
* Machine-independent I/O routines for IEEE floating-point numbers.
*
* NaN's and infinities are converted to HUGE_VAL or HUGE, which
* happens to be infinity on IEEE machines. Unfortunately, it is
* impossible to preserve NaN's in a machine-independent way.
* Infinities are, however, preserved on IEEE machines.
*
* These routines have been tested on the following machines:
* Apple Macintosh, MPW 3.1 C compiler
* Apple Macintosh, THINK C compiler
* Silicon Graphics IRIS, MIPS compiler
* Cray X/MP and Y/MP
* Digital Equipment VAX
*
*
* Implemented by Malcolm Slaney and Ken Turkowski.
*
* Malcolm Slaney contributions during 1988-1990 include big- and little-
* endian file I/O, conversion to and from Motorola's extended 80-bit
* floating-point format, and conversions to and from IEEE single-
* precision floating-point format.
*
* In 1991, Ken Turkowski implemented the conversions to and from
* IEEE double-precision format, added more precision to the extended
* conversions, and accommodated conversions involving +/- infinity,
* NaN's, and denormalized numbers.
*/
public static double readIeeeExtended(DataInputStream dis)
throws IOException
{
double f = 0.0D;
int expon = 0;
long hiMant = 0L;
long loMant = 0L;
double HUGE = 3.4028234663852886E+038D;
expon = dis.readUnsignedShort();
long t1 = dis.readUnsignedShort();
long t2 = dis.readUnsignedShort();
hiMant = t1 << 16 | t2;
t1 = dis.readUnsignedShort();
t2 = dis.readUnsignedShort();
loMant = t1 << 16 | t2;
if(expon == 0 && hiMant == 0L && loMant == 0L)
{
f = 0.0D;
}
else
{
if(expon == 32767)
{
f = HUGE;
}
else
{
expon -= 16383;
expon -= 31;
f = hiMant * Math.pow(2D, expon);
expon -= 32;
f += loMant * Math.pow(2D, expon);
}
}
return f;
}
}
/*** TAudioFileReader.java ***/