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/*
* Copyright 2009 Phil Burk, Mobileer Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.jsyn.util.soundfile;
import java.io.EOFException;
import java.io.IOException;
import com.jsyn.data.FloatSample;
import com.jsyn.data.SampleMarker;
import com.jsyn.util.SampleLoader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class AIFFFileParser extends AudioFileParser {
private static final Logger LOGGER = LoggerFactory.getLogger(AIFFFileParser.class);
private static final String SUPPORTED_FORMATS = "Only 16 and 24 bit PCM or 32-bit float AIF files supported.";
static final int AIFF_ID = ('A' << 24) | ('I' << 16) | ('F' << 8) | 'F';
static final int AIFC_ID = ('A' << 24) | ('I' << 16) | ('F' << 8) | 'C';
static final int COMM_ID = ('C' << 24) | ('O' << 16) | ('M' << 8) | 'M';
static final int SSND_ID = ('S' << 24) | ('S' << 16) | ('N' << 8) | 'D';
static final int MARK_ID = ('M' << 24) | ('A' << 16) | ('R' << 8) | 'K';
static final int INST_ID = ('I' << 24) | ('N' << 16) | ('S' << 8) | 'T';
static final int NONE_ID = ('N' << 24) | ('O' << 16) | ('N' << 8) | 'E';
static final int FL32_ID = ('F' << 24) | ('L' << 16) | ('3' << 8) | '2';
static final int FL32_ID_LC = ('f' << 24) | ('l' << 16) | ('3' << 8) | '2';
int sustainBeginID = -1;
int sustainEndID = -1;
int releaseBeginID = -1;
int releaseEndID = -1;
boolean typeFloat = false;
@Override
FloatSample finish() throws IOException {
setLoops();
if ((byteData == null)) {
throw new IOException("No data found in audio sample.");
}
float[] floatData = new float[numFrames * samplesPerFrame];
if (bitsPerSample == 16) {
SampleLoader.decodeBigI16ToF32(byteData, 0, byteData.length, floatData, 0);
} else if (bitsPerSample == 24) {
SampleLoader.decodeBigI24ToF32(byteData, 0, byteData.length, floatData, 0);
} else if (bitsPerSample == 32) {
if (typeFloat) {
SampleLoader.decodeBigF32ToF32(byteData, 0, byteData.length, floatData, 0);
} else {
SampleLoader.decodeBigI32ToF32(byteData, 0, byteData.length, floatData, 0);
}
} else {
throw new IOException(SUPPORTED_FORMATS + " size = " + bitsPerSample);
}
return makeSample(floatData);
}
double read80BitFloat() throws IOException {
/*
* This is not a full decoding of the 80 bit number but it should suffice for the range we
* expect.
*/
byte[] bytes = new byte[10];
parser.read(bytes);
int exp = ((bytes[0] & 0x3F) << 8) | (bytes[1] & 0xFF);
int mant = ((bytes[2] & 0xFF) << 16) | ((bytes[3] & 0xFF) << 8) | (bytes[4] & 0xFF);
// LOGGER.debug( "exp = " + exp + ", mant = " + mant );
return mant / (double) (1 << (22 - exp));
}
void parseCOMMChunk(IFFParser parser, int ckSize) throws IOException {
samplesPerFrame = parser.readShortBig();
numFrames = parser.readIntBig();
bitsPerSample = parser.readShortBig();
frameRate = read80BitFloat();
if (ckSize > 18) {
int format = parser.readIntBig();
// Validate data format.
if ((format == FL32_ID) || (format == FL32_ID_LC)) {
typeFloat = true;
} else if (format == NONE_ID) {
typeFloat = false;
} else {
throw new IOException(SUPPORTED_FORMATS + " format " + IFFParser.IDToString(format));
}
}
bytesPerSample = (bitsPerSample + 7) / 8;
bytesPerFrame = bytesPerSample * samplesPerFrame;
}
/* parse tuning and multi-sample info */
@SuppressWarnings("unused")
void parseINSTChunk(IFFParser parser, int ckSize) throws IOException {
int baseNote = parser.readByte();
int detune = parser.readByte();
originalPitch = baseNote + (0.01 * detune);
int lowNote = parser.readByte();
int highNote = parser.readByte();
parser.skip(2); /* lo,hi velocity */
int gain = parser.readShortBig();
int playMode = parser.readShortBig(); /* sustain */
sustainBeginID = parser.readShortBig();
sustainEndID = parser.readShortBig();
playMode = parser.readShortBig(); /* release */
releaseBeginID = parser.readShortBig();
releaseEndID = parser.readShortBig();
}
private void setLoops() {
SampleMarker cuePoint = cueMap.get(sustainBeginID);
if (cuePoint != null) {
sustainBegin = cuePoint.position;
}
cuePoint = cueMap.get(sustainEndID);
if (cuePoint != null) {
sustainEnd = cuePoint.position;
}
}
void parseSSNDChunk(IFFParser parser, int ckSize) throws IOException {
long numRead;
// LOGGER.debug("parseSSNDChunk()");
int offset = parser.readIntBig();
parser.readIntBig(); /* blocksize */
parser.skip(offset);
dataPosition = parser.getOffset();
int numBytes = ckSize - 8 - offset;
if (ifLoadData) {
byteData = new byte[numBytes];
numRead = parser.read(byteData);
} else {
numRead = parser.skip(numBytes);
}
if (numRead != numBytes)
throw new EOFException("AIFF data chunk too short!");
}
void parseMARKChunk(IFFParser parser, int ckSize) throws IOException {
long startOffset = parser.getOffset();
int numCuePoints = parser.readShortBig();
// LOGGER.debug( "parseCueChunk: numCuePoints = " + numCuePoints
// );
for (int i = 0; i < numCuePoints; i++) {
// Some AIF files have a bogus numCuePoints so check to see if we
// are at end.
long numInMark = parser.getOffset() - startOffset;
if (numInMark >= ckSize) {
LOGGER.debug("Reached end of MARK chunk with bogus numCuePoints = "
+ numCuePoints);
break;
}
int uniqueID = parser.readShortBig();
int position = parser.readIntBig();
int len = parser.read();
String markerName = parseString(parser, len);
if ((len & 1) == 0) {
parser.skip(1); /* skip pad byte */
}
SampleMarker cuePoint = findOrCreateCuePoint(uniqueID);
cuePoint.position = position;
cuePoint.name = markerName;
if (IFFParser.debug) {
LOGGER.debug("AIFF Marker at " + position + ", " + markerName);
}
}
}
/**
* Called by parse() method to handle FORM chunks in an AIFF specific manner.
*
* @param ckID four byte chunk ID such as 'data'
* @param ckSize size of chunk in bytes
* @exception IOException If parsing fails, or IO error occurs.
*/
@Override
public void handleForm(IFFParser parser, int ckID, int ckSize, int type) throws IOException {
if ((ckID == IFFParser.FORM_ID) && (type != AIFF_ID) && (type != AIFC_ID))
throw new IOException("Bad AIFF form type = " + IFFParser.IDToString(type));
}
/**
* Called by parse() method to handle chunks in an AIFF specific manner.
*
* @param ckID four byte chunk ID such as 'data'
* @param ckSize size of chunk in bytes
* @exception IOException If parsing fails, or IO error occurs.
*/
@Override
public void handleChunk(IFFParser parser, int ckID, int ckSize) throws IOException {
switch (ckID) {
case COMM_ID:
parseCOMMChunk(parser, ckSize);
break;
case SSND_ID:
parseSSNDChunk(parser, ckSize);
break;
case MARK_ID:
parseMARKChunk(parser, ckSize);
break;
case INST_ID:
parseINSTChunk(parser, ckSize);
break;
default:
break;
}
}
}
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