| /* |
| * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.media.sound; |
| |
| import java.io.DataInputStream; |
| import java.io.EOFException; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URL; |
| |
| import javax.sound.sampled.AudioFileFormat; |
| import javax.sound.sampled.AudioFormat; |
| import javax.sound.sampled.AudioInputStream; |
| import javax.sound.sampled.AudioSystem; |
| import javax.sound.sampled.UnsupportedAudioFileException; |
| |
| |
| |
| /** |
| * WAVE file reader. |
| * |
| * @author Kara Kytle |
| * @author Jan Borgersen |
| * @author Florian Bomers |
| */ |
| public final class WaveFileReader extends SunFileReader { |
| |
| private static final int MAX_READ_LENGTH = 12; |
| |
| /** |
| * Constructs a new WaveFileReader object. |
| */ |
| public WaveFileReader() { |
| } |
| |
| |
| /** |
| * Obtains the audio file format of the input stream provided. The stream must |
| * point to valid audio file data. In general, audio file providers may |
| * need to read some data from the stream before determining whether they |
| * support it. These parsers must |
| * be able to mark the stream, read enough data to determine whether they |
| * support the stream, and, if not, reset the stream's read pointer to its original |
| * position. If the input stream does not support this, this method may fail |
| * with an IOException. |
| * @param stream the input stream from which file format information should be |
| * extracted |
| * @return an <code>AudioFileFormat</code> object describing the audio file format |
| * @throws UnsupportedAudioFileException if the stream does not point to valid audio |
| * file data recognized by the system |
| * @throws IOException if an I/O exception occurs |
| * @see InputStream#markSupported |
| * @see InputStream#mark |
| */ |
| public AudioFileFormat getAudioFileFormat(InputStream stream) throws UnsupportedAudioFileException, IOException { |
| // fix for 4489272: AudioSystem.getAudioFileFormat() fails for InputStream, but works for URL |
| AudioFileFormat aff = getFMT(stream, true); |
| // the following is not strictly necessary - but was implemented like that in 1.3.0 - 1.4.1 |
| // so I leave it as it was. May remove this for 1.5.0 |
| stream.reset(); |
| return aff; |
| } |
| |
| |
| /** |
| * Obtains the audio file format of the URL provided. The URL must |
| * point to valid audio file data. |
| * @param url the URL from which file format information should be |
| * extracted |
| * @return an <code>AudioFileFormat</code> object describing the audio file format |
| * @throws UnsupportedAudioFileException if the URL does not point to valid audio |
| * file data recognized by the system |
| * @throws IOException if an I/O exception occurs |
| */ |
| public AudioFileFormat getAudioFileFormat(URL url) throws UnsupportedAudioFileException, IOException { |
| InputStream urlStream = url.openStream(); // throws IOException |
| AudioFileFormat fileFormat = null; |
| try { |
| fileFormat = getFMT(urlStream, false); |
| } finally { |
| urlStream.close(); |
| } |
| return fileFormat; |
| } |
| |
| |
| /** |
| * Obtains the audio file format of the File provided. The File must |
| * point to valid audio file data. |
| * @param file the File from which file format information should be |
| * extracted |
| * @return an <code>AudioFileFormat</code> object describing the audio file format |
| * @throws UnsupportedAudioFileException if the File does not point to valid audio |
| * file data recognized by the system |
| * @throws IOException if an I/O exception occurs |
| */ |
| public AudioFileFormat getAudioFileFormat(File file) throws UnsupportedAudioFileException, IOException { |
| AudioFileFormat fileFormat = null; |
| FileInputStream fis = new FileInputStream(file); // throws IOException |
| // part of fix for 4325421 |
| try { |
| fileFormat = getFMT(fis, false); |
| } finally { |
| fis.close(); |
| } |
| |
| return fileFormat; |
| } |
| |
| |
| /** |
| * Obtains an audio stream from the input stream provided. The stream must |
| * point to valid audio file data. In general, audio file providers may |
| * need to read some data from the stream before determining whether they |
| * support it. These parsers must |
| * be able to mark the stream, read enough data to determine whether they |
| * support the stream, and, if not, reset the stream's read pointer to its original |
| * position. If the input stream does not support this, this method may fail |
| * with an IOException. |
| * @param stream the input stream from which the <code>AudioInputStream</code> should be |
| * constructed |
| * @return an <code>AudioInputStream</code> object based on the audio file data contained |
| * in the input stream. |
| * @throws UnsupportedAudioFileException if the stream does not point to valid audio |
| * file data recognized by the system |
| * @throws IOException if an I/O exception occurs |
| * @see InputStream#markSupported |
| * @see InputStream#mark |
| */ |
| public AudioInputStream getAudioInputStream(InputStream stream) throws UnsupportedAudioFileException, IOException { |
| // getFMT leaves the input stream at the beginning of the audio data |
| AudioFileFormat fileFormat = getFMT(stream, true); // throws UnsupportedAudioFileException, IOException |
| |
| // we've got everything, and the stream is at the |
| // beginning of the audio data, so return an AudioInputStream. |
| return new AudioInputStream(stream, fileFormat.getFormat(), fileFormat.getFrameLength()); |
| } |
| |
| |
| /** |
| * Obtains an audio stream from the URL provided. The URL must |
| * point to valid audio file data. |
| * @param url the URL for which the <code>AudioInputStream</code> should be |
| * constructed |
| * @return an <code>AudioInputStream</code> object based on the audio file data pointed |
| * to by the URL |
| * @throws UnsupportedAudioFileException if the URL does not point to valid audio |
| * file data recognized by the system |
| * @throws IOException if an I/O exception occurs |
| */ |
| public AudioInputStream getAudioInputStream(URL url) throws UnsupportedAudioFileException, IOException { |
| InputStream urlStream = url.openStream(); // throws IOException |
| AudioFileFormat fileFormat = null; |
| try { |
| fileFormat = getFMT(urlStream, false); |
| } finally { |
| if (fileFormat == null) { |
| urlStream.close(); |
| } |
| } |
| return new AudioInputStream(urlStream, fileFormat.getFormat(), fileFormat.getFrameLength()); |
| } |
| |
| |
| /** |
| * Obtains an audio stream from the File provided. The File must |
| * point to valid audio file data. |
| * @param file the File for which the <code>AudioInputStream</code> should be |
| * constructed |
| * @return an <code>AudioInputStream</code> object based on the audio file data pointed |
| * to by the File |
| * @throws UnsupportedAudioFileException if the File does not point to valid audio |
| * file data recognized by the system |
| * @throws IOException if an I/O exception occurs |
| */ |
| public AudioInputStream getAudioInputStream(File file) throws UnsupportedAudioFileException, IOException { |
| FileInputStream fis = new FileInputStream(file); // throws IOException |
| AudioFileFormat fileFormat = null; |
| // part of fix for 4325421 |
| try { |
| fileFormat = getFMT(fis, false); |
| } finally { |
| if (fileFormat == null) { |
| fis.close(); |
| } |
| } |
| return new AudioInputStream(fis, fileFormat.getFormat(), fileFormat.getFrameLength()); |
| } |
| |
| |
| //-------------------------------------------------------------------- |
| |
| |
| private AudioFileFormat getFMT(InputStream stream, boolean doReset) throws UnsupportedAudioFileException, IOException { |
| |
| // assumes sream is rewound |
| |
| int bytesRead; |
| int nread = 0; |
| int fmt; |
| int length = 0; |
| int wav_type = 0; |
| short channels; |
| long sampleRate; |
| long avgBytesPerSec; |
| short blockAlign; |
| int sampleSizeInBits; |
| AudioFormat.Encoding encoding = null; |
| |
| DataInputStream dis = new DataInputStream( stream ); |
| |
| if (doReset) { |
| dis.mark(MAX_READ_LENGTH); |
| } |
| |
| int magic = dis.readInt(); |
| int fileLength = rllong(dis); |
| int waveMagic = dis.readInt(); |
| int totallength; |
| if (fileLength <= 0) { |
| fileLength = AudioSystem.NOT_SPECIFIED; |
| totallength = AudioSystem.NOT_SPECIFIED; |
| } else { |
| totallength = fileLength + 8; |
| } |
| |
| if ((magic != WaveFileFormat.RIFF_MAGIC) || (waveMagic != WaveFileFormat.WAVE_MAGIC)) { |
| // not WAVE, throw UnsupportedAudioFileException |
| if (doReset) { |
| dis.reset(); |
| } |
| throw new UnsupportedAudioFileException("not a WAVE file"); |
| } |
| |
| // find and read the "fmt" chunk |
| // we break out of this loop either by hitting EOF or finding "fmt " |
| while(true) { |
| |
| try { |
| fmt = dis.readInt(); |
| nread += 4; |
| if( fmt==WaveFileFormat.FMT_MAGIC ) { |
| // we've found the 'fmt' chunk |
| break; |
| } else { |
| // else not 'fmt', skip this chunk |
| length = rllong(dis); |
| nread += 4; |
| if (length % 2 > 0) length++; |
| nread += dis.skipBytes(length); |
| } |
| } catch (EOFException eof) { |
| // we've reached the end of the file without finding the 'fmt' chunk |
| throw new UnsupportedAudioFileException("Not a valid WAV file"); |
| } |
| } |
| |
| // Read the format chunk size. |
| length = rllong(dis); |
| nread += 4; |
| |
| // This is the nread position at the end of the format chunk |
| int endLength = nread + length; |
| |
| // Read the wave format data out of the format chunk. |
| |
| // encoding. |
| wav_type = rlshort(dis); nread += 2; |
| |
| if (wav_type == WaveFileFormat.WAVE_FORMAT_PCM) |
| encoding = AudioFormat.Encoding.PCM_SIGNED; // if 8-bit, we need PCM_UNSIGNED, below... |
| else if ( wav_type == WaveFileFormat.WAVE_FORMAT_ALAW ) |
| encoding = AudioFormat.Encoding.ALAW; |
| else if ( wav_type == WaveFileFormat.WAVE_FORMAT_MULAW ) |
| encoding = AudioFormat.Encoding.ULAW; |
| else { |
| // we don't support any other WAVE formats.... |
| throw new UnsupportedAudioFileException("Not a supported WAV file"); |
| } |
| // channels |
| channels = rlshort(dis); nread += 2; |
| |
| // sample rate. |
| sampleRate = rllong(dis); nread += 4; |
| |
| // this is the avgBytesPerSec |
| avgBytesPerSec = rllong(dis); nread += 4; |
| |
| // this is blockAlign value |
| blockAlign = rlshort(dis); nread += 2; |
| |
| // this is the PCM-specific value bitsPerSample |
| sampleSizeInBits = (int)rlshort(dis); nread += 2; |
| |
| // if sampleSizeInBits==8, we need to use PCM_UNSIGNED |
| if ((sampleSizeInBits==8) && encoding.equals(AudioFormat.Encoding.PCM_SIGNED)) |
| encoding = AudioFormat.Encoding.PCM_UNSIGNED; |
| |
| // skip any difference between the length of the format chunk |
| // and what we read |
| |
| // if the length of the chunk is odd, there's an extra pad byte |
| // at the end. i've never seen this in the fmt chunk, but we |
| // should check to make sure. |
| |
| if (length % 2 != 0) length += 1; |
| |
| // $$jb: 07.28.99: endLength>nread, not length>nread. |
| // This fixes #4257986 |
| if (endLength > nread) |
| nread += dis.skipBytes(endLength - nread); |
| |
| // we have a format now, so find the "data" chunk |
| // we break out of this loop either by hitting EOF or finding "data" |
| // $$kk: if "data" chunk precedes "fmt" chunk we are hosed -- can this legally happen? |
| nread = 0; |
| while(true) { |
| try{ |
| int datahdr = dis.readInt(); |
| nread+=4; |
| if (datahdr == WaveFileFormat.DATA_MAGIC) { |
| // we've found the 'data' chunk |
| break; |
| } else { |
| // else not 'data', skip this chunk |
| int thisLength = rllong(dis); nread += 4; |
| if (thisLength % 2 > 0) thisLength++; |
| nread += dis.skipBytes(thisLength); |
| } |
| } catch (EOFException eof) { |
| // we've reached the end of the file without finding the 'data' chunk |
| throw new UnsupportedAudioFileException("Not a valid WAV file"); |
| } |
| } |
| // this is the length of the data chunk |
| int dataLength = rllong(dis); nread += 4; |
| |
| // now build the new AudioFileFormat and return |
| |
| AudioFormat format = new AudioFormat(encoding, |
| (float)sampleRate, |
| sampleSizeInBits, channels, |
| calculatePCMFrameSize(sampleSizeInBits, channels), |
| (float)sampleRate, false); |
| |
| return new WaveFileFormat(AudioFileFormat.Type.WAVE, |
| totallength, |
| format, |
| dataLength / format.getFrameSize()); |
| } |
| |
| } |
