/** Initializes the state of the module for parsing. */
protected void initParse() {
super.initParse();
_propList = new LinkedList();
_notes = new LinkedList();
_labels = new LinkedList();
_labeledText = new LinkedList();
_samples = new LinkedList();
firstSampleOffsetMarked = false;
numSamples = 0;
_metadata = new Property("WAVEMetadata", PropertyType.PROPERTY, PropertyArity.LIST, _propList);
_aesMetadata = new AESAudioMetadata();
_aesMetadata.setByteOrder(AESAudioMetadata.LITTLE_ENDIAN);
_aesMetadata.setAnalogDigitalFlag("FILE_DIGITAL");
_aesMetadata.setFormat("WAVE");
_aesMetadata.setUse("OTHER", "JHOVE_validation");
_aesMetadata.setDirection("NONE");
_propList.add(new Property("AESAudioMetadata", PropertyType.AESAUDIOMETADATA, _aesMetadata));
// Most chunk types are allowed to occur only once,
// and a few must occur exactly once.
// Clear flags for whether they have been seen.
formatChunkSeen = false;
dataChunkSeen = false;
instrumentChunkSeen = false;
cartChunkSeen = false;
mpegChunkSeen = false;
broadcastExtChunkSeen = false;
peakChunkSeen = false;
linkChunkSeen = false;
cueChunkSeen = false;
// Initialize profile flags
flagPCMWaveFormat = false;
flagWaveFormatEx = false;
flagWaveFormatExtensible = false;
flagBroadcastWave = false;
}
/**
* General function for adding a property with a 32-bit value, with two arrays of Strings to
* interpret 0 and 1 values as a bitmask.
*
* @param val The bitmask
* @param name The name for the Property
* @param oneValueNames Array of names to use for '1' values
* @param zeroValueNames Array of names to use for '0' values
*/
public Property buildBitmaskProperty(
int val, String name, String[] oneValueNames, String[] zeroValueNames) {
if (_je != null && _je.getShowRawFlag()) {
return new Property(name, PropertyType.INTEGER, new Integer(val));
} else {
List slist = new LinkedList();
try {
for (int i = 0; i < oneValueNames.length; i++) {
String s = null;
if ((val & (1 << i)) != 0) {
s = oneValueNames[i];
} else {
s = zeroValueNames[i];
}
if (s != null && s.length() > 0) {
slist.add(s);
}
}
} catch (Exception e) {
return null;
}
return new Property(name, PropertyType.STRING, PropertyArity.LIST, slist);
}
}
/** Adds a Note string */
public void addNote(Property p) {
_notes.add(p);
}
/** Adds the ListInfo property, which is a List of String Properties. */
public void addListInfo(List l) {
_propList.add(new Property("ListInfo", PropertyType.PROPERTY, PropertyArity.LIST, l));
}
/** Adds a Sample property */
public void addSample(Property p) {
_samples.add(p);
}
/** Adds a LabeledText property */
public void addLabeledText(Property p) {
_labeledText.add(p);
}
/** Adds a Label property */
public void addLabel(Property p) {
_labels.add(p);
}
/** Adds a Property to the WAVE metadata. */
public void addWaveProperty(Property prop) {
_propList.add(prop);
}
/**
* Parses the content of a purported WAVE digital object and stores the results in RepInfo.
*
* @param stream An InputStream, positioned at its beginning, which is generated from the object
* to be parsed
* @param info A fresh RepInfo object which will be modified to reflect the results of the parsing
* @param parseIndex Must be 0 in first call to <code>parse</code>. If <code>parse</code> returns
* a nonzero value, it must be called again with <code>parseIndex</code> equal to that return
* value.
*/
public int parse(InputStream stream, RepInfo info, int parseIndex) throws IOException {
initParse();
info.setFormat(_format[0]);
info.setMimeType(_mimeType[0]);
info.setModule(this);
_aesMetadata.setPrimaryIdentifier(info.getUri());
if (info.getURLFlag()) {
_aesMetadata.setOtherPrimaryIdentifierType("URI");
} else {
_aesMetadata.setPrimaryIdentifierType(AESAudioMetadata.FILE_NAME);
}
/* We may have already done the checksums while converting a
temporary file. */
_ckSummer = null;
if (_je != null && _je.getChecksumFlag() && info.getChecksum().size() == 0) {
_ckSummer = new Checksummer();
_cstream = new ChecksumInputStream(stream, _ckSummer);
_dstream = getBufferedDataStream(_cstream, _je != null ? _je.getBufferSize() : 0);
} else {
_dstream = getBufferedDataStream(stream, _je != null ? _je.getBufferSize() : 0);
}
try {
// Check the start of the file for the right opening bytes
for (int i = 0; i < 4; i++) {
int ch = readUnsignedByte(_dstream, this);
if (ch != sigByte[i]) {
info.setMessage(new ErrorMessage("Document does not start with RIFF chunk", 0));
info.setWellFormed(false);
return 0;
}
}
/* If we got this far, take note that the signature is OK. */
info.setSigMatch(_name);
// Get the length of the Form chunk. This includes all
// the subsequent chunks in the file, but excludes the
// header ("FORM" and the length itself).
bytesRemaining = readUnsignedInt(_dstream);
// Read the file type.
String typ = read4Chars(_dstream);
bytesRemaining -= 4;
if (!"WAVE".equals(typ)) {
info.setMessage(new ErrorMessage("File type in RIFF header is not WAVE", _nByte));
info.setWellFormed(false);
return 0;
}
while (bytesRemaining > 0) {
if (!readChunk(info)) {
break;
}
}
} catch (EOFException e) {
info.setWellFormed(false);
info.setMessage(new ErrorMessage("Unexpected end of file", _nByte));
return 0;
}
// Set duration from number of samples and rate.
if (numSamples > 0) {
// _aesMetadata.setDuration((double) numSamples / sampleRate);
_aesMetadata.setDuration(numSamples);
}
// Add note and label properties, if there's anything
// to report.
if (!_labels.isEmpty()) {
_propList.add(new Property("Labels", PropertyType.PROPERTY, PropertyArity.LIST, _labels));
}
if (!_labeledText.isEmpty()) {
_propList.add(
new Property("LabeledText", PropertyType.PROPERTY, PropertyArity.LIST, _labeledText));
}
if (!_notes.isEmpty()) {
_propList.add(new Property("Notes", PropertyType.PROPERTY, PropertyArity.LIST, _notes));
}
if (!_samples.isEmpty()) {
_propList.add(new Property("Samples", PropertyType.PROPERTY, PropertyArity.LIST, _samples));
}
if (_exifInfo != null) {
_propList.add(_exifInfo.buildProperty());
}
if (!formatChunkSeen) {
info.setMessage(new ErrorMessage("No Format Chunk"));
info.setWellFormed(false);
return 0;
}
/* This file looks OK. */
if (_ckSummer != null) {
/* We may not have actually hit the end of file. If we're calculating
* checksums on the fly, we have to read and discard whatever is
* left, so it will get checksummed. */
for (; ; ) {
try {
int n = skipBytes(_dstream, 2048, this);
if (n == 0) {
break;
}
} catch (Exception e) {
break;
}
}
info.setSize(_cstream.getNBytes());
info.setChecksum(new Checksum(_ckSummer.getCRC32(), ChecksumType.CRC32));
String value = _ckSummer.getMD5();
if (value != null) {
info.setChecksum(new Checksum(value, ChecksumType.MD5));
}
if ((value = _ckSummer.getSHA1()) != null) {
info.setChecksum(new Checksum(value, ChecksumType.SHA1));
}
}
info.setProperty(_metadata);
// Indicate satisfied profiles.
if (flagPCMWaveFormat) {
info.setProfile("PCMWAVEFORMAT");
}
if (flagWaveFormatEx) {
info.setProfile("WAVEFORMATEX");
}
if (flagWaveFormatExtensible) {
info.setProfile("WAVEFORMATEXTENSIBLE");
}
if (flagBroadcastWave) {
// Need to do some additional checks.
if (!broadcastExtChunkSeen) {
flagBroadcastWave = false;
}
if (compressionCode == FormatChunk.WAVE_FORMAT_MPEG) {
if (!broadcastExtChunkSeen || !factChunkSeen) {
flagBroadcastWave = false;
}
}
if (flagBroadcastWave) {
String prof = null;
switch (broadcastVersion) {
case 0:
prof = "Broadcast Wave Version 0";
break;
case 1:
prof = "Broadcast Wave Version 1";
break;
// Other versions are unknown at this time
}
if (prof != null) {
info.setProfile(prof);
}
}
}
return 0;
}