/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* 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.
*
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package com.sun.media.sound;
import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;
/**
* WAVE file format class.
*
* @author Jan Borgersen
*/
final class WaveFileFormat extends AudioFileFormat {
/**
* Wave format type.
*/
private final int waveType;
//$$fb 2001-07-13: added management of header size in this class
//$$fb 2002-04-16: Fix for 4636355: RIFF audio headers could be _more_ spec compliant
private static final int STANDARD_HEADER_SIZE = 28;
//$$fb 2002-04-16: Fix for 4636355: RIFF audio headers could be _more_ spec compliant
/**
* fmt_ chunk size in bytes
*/
private static final int STANDARD_FMT_CHUNK_SIZE = 16;
// magic numbers
static final int RIFF_MAGIC = 1380533830;
static final int WAVE_MAGIC = 1463899717;
static final int FMT_MAGIC = 0x666d7420; // "fmt "
static final int DATA_MAGIC = 0x64617461; // "data"
// encodings
static final int WAVE_FORMAT_UNKNOWN = 0x0000;
static final int WAVE_FORMAT_PCM = 0x0001;
static final int WAVE_FORMAT_ADPCM = 0x0002;
static final int WAVE_FORMAT_ALAW = 0x0006;
static final int WAVE_FORMAT_MULAW = 0x0007;
static final int WAVE_FORMAT_OKI_ADPCM = 0x0010;
static final int WAVE_FORMAT_DIGISTD = 0x0015;
static final int WAVE_FORMAT_DIGIFIX = 0x0016;
static final int WAVE_IBM_FORMAT_MULAW = 0x0101;
static final int WAVE_IBM_FORMAT_ALAW = 0x0102;
static final int WAVE_IBM_FORMAT_ADPCM = 0x0103;
static final int WAVE_FORMAT_DVI_ADPCM = 0x0011;
static final int WAVE_FORMAT_SX7383 = 0x1C07;
WaveFileFormat( AudioFileFormat aff ) {
this( aff.getType(), aff.getByteLength(), aff.getFormat(), aff.getFrameLength() );
}
WaveFileFormat(AudioFileFormat.Type type, int lengthInBytes, AudioFormat format, int lengthInFrames) {
super(type,lengthInBytes,format,lengthInFrames);
AudioFormat.Encoding encoding = format.getEncoding();
if( encoding.equals(AudioFormat.Encoding.ALAW) ) {
waveType = WAVE_FORMAT_ALAW;
} else if( encoding.equals(AudioFormat.Encoding.ULAW) ) {
waveType = WAVE_FORMAT_MULAW;
} else if( encoding.equals(AudioFormat.Encoding.PCM_SIGNED) ||
encoding.equals(AudioFormat.Encoding.PCM_UNSIGNED) ) {
waveType = WAVE_FORMAT_PCM;
} else {
waveType = WAVE_FORMAT_UNKNOWN;
}
}
int getWaveType() {
return waveType;
}
int getHeaderSize() {
return getHeaderSize(getWaveType());
}
static int getHeaderSize(int waveType) {
//$$fb 2002-04-16: Fix for 4636355: RIFF audio headers could be _more_ spec compliant
// use dynamic format chunk size
return STANDARD_HEADER_SIZE + getFmtChunkSize(waveType);
}
static int getFmtChunkSize(int waveType) {
//$$fb 2002-04-16: Fix for 4636355: RIFF audio headers could be _more_ spec compliant
// add 2 bytes for "codec specific data length" for non-PCM codecs
int result = STANDARD_FMT_CHUNK_SIZE;
if (waveType != WAVE_FORMAT_PCM) {
result += 2; // WORD for "codec specific data length"
}
return result;
}
}