125 lines
4.5 KiB
Java
125 lines
4.5 KiB
Java
/*
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* Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.media.sound;
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import javax.sound.sampled.AudioFileFormat;
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import javax.sound.sampled.AudioFormat;
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/**
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* WAVE file format class.
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*
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* @author Jan Borgersen
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*/
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final class WaveFileFormat extends AudioFileFormat {
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/**
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* Wave format type.
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*/
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private final int waveType;
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//$$fb 2001-07-13: added management of header size in this class
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//$$fb 2002-04-16: Fix for 4636355: RIFF audio headers could be _more_ spec compliant
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private static final int STANDARD_HEADER_SIZE = 28;
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//$$fb 2002-04-16: Fix for 4636355: RIFF audio headers could be _more_ spec compliant
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/**
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* fmt_ chunk size in bytes
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*/
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private static final int STANDARD_FMT_CHUNK_SIZE = 16;
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// magic numbers
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static final int RIFF_MAGIC = 1380533830;
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static final int WAVE_MAGIC = 1463899717;
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static final int FMT_MAGIC = 0x666d7420; // "fmt "
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static final int DATA_MAGIC = 0x64617461; // "data"
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// encodings
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static final int WAVE_FORMAT_UNKNOWN = 0x0000;
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static final int WAVE_FORMAT_PCM = 0x0001;
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static final int WAVE_FORMAT_ADPCM = 0x0002;
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static final int WAVE_FORMAT_ALAW = 0x0006;
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static final int WAVE_FORMAT_MULAW = 0x0007;
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static final int WAVE_FORMAT_OKI_ADPCM = 0x0010;
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static final int WAVE_FORMAT_DIGISTD = 0x0015;
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static final int WAVE_FORMAT_DIGIFIX = 0x0016;
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static final int WAVE_IBM_FORMAT_MULAW = 0x0101;
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static final int WAVE_IBM_FORMAT_ALAW = 0x0102;
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static final int WAVE_IBM_FORMAT_ADPCM = 0x0103;
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static final int WAVE_FORMAT_DVI_ADPCM = 0x0011;
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static final int WAVE_FORMAT_SX7383 = 0x1C07;
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WaveFileFormat( AudioFileFormat aff ) {
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this( aff.getType(), aff.getByteLength(), aff.getFormat(), aff.getFrameLength() );
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}
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WaveFileFormat(AudioFileFormat.Type type, int lengthInBytes, AudioFormat format, int lengthInFrames) {
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super(type,lengthInBytes,format,lengthInFrames);
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AudioFormat.Encoding encoding = format.getEncoding();
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if( encoding.equals(AudioFormat.Encoding.ALAW) ) {
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waveType = WAVE_FORMAT_ALAW;
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} else if( encoding.equals(AudioFormat.Encoding.ULAW) ) {
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waveType = WAVE_FORMAT_MULAW;
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} else if( encoding.equals(AudioFormat.Encoding.PCM_SIGNED) ||
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encoding.equals(AudioFormat.Encoding.PCM_UNSIGNED) ) {
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waveType = WAVE_FORMAT_PCM;
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} else {
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waveType = WAVE_FORMAT_UNKNOWN;
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}
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}
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int getWaveType() {
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return waveType;
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}
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int getHeaderSize() {
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return getHeaderSize(getWaveType());
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}
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static int getHeaderSize(int waveType) {
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//$$fb 2002-04-16: Fix for 4636355: RIFF audio headers could be _more_ spec compliant
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// use dynamic format chunk size
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return STANDARD_HEADER_SIZE + getFmtChunkSize(waveType);
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}
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static int getFmtChunkSize(int waveType) {
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//$$fb 2002-04-16: Fix for 4636355: RIFF audio headers could be _more_ spec compliant
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// add 2 bytes for "codec specific data length" for non-PCM codecs
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int result = STANDARD_FMT_CHUNK_SIZE;
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if (waveType != WAVE_FORMAT_PCM) {
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result += 2; // WORD for "codec specific data length"
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}
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return result;
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}
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}
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