/** Reads a WAVE Chunk. */
protected boolean readChunk(RepInfo info) throws IOException {
Chunk chunk = null;
ChunkHeader chunkh = new ChunkHeader(this, info);
if (!chunkh.readHeader(_dstream)) {
return false;
}
int chunkSize = (int) chunkh.getSize();
bytesRemaining -= chunkSize + 8;
if (bytesRemaining < 0) {
info.setMessage(new ErrorMessage("Invalid chunk size", _nByte));
return false;
}
String id = chunkh.getID();
if ("fmt ".equals(id)) {
if (formatChunkSeen) {
dupChunkError(info, "Format");
}
chunk = new FormatChunk(this, chunkh, _dstream);
formatChunkSeen = true;
} else if ("data".equals(id)) {
if (dataChunkSeen) {
dupChunkError(info, "Data");
}
chunk = new DataChunk(this, chunkh, _dstream);
dataChunkSeen = true;
} else if ("fact".equals(id)) {
chunk = new FactChunk(this, chunkh, _dstream);
factChunkSeen = true;
// Are multiple 'fact' chunks allowed?
} else if ("note".equals(id)) {
chunk = new NoteChunk(this, chunkh, _dstream);
// Multiple note chunks are allowed
} else if ("labl".equals(id)) {
chunk = new LabelChunk(this, chunkh, _dstream);
// Multiple label chunks are allowed
} else if ("list".equals(id)) {
chunk = new AssocDataListChunk(this, chunkh, _dstream, info);
// Are multiple chunks allowed? Who knows?
} else if ("LIST".equals(id)) {
chunk = new ListInfoChunk(this, chunkh, _dstream, info);
// Multiple list chunks must be OK, since there can
// be different types, e.g., an INFO list and an exif list.
} else if ("smpl".equals(id)) {
chunk = new SampleChunk(this, chunkh, _dstream);
// Multiple sample chunks are allowed -- I think
} else if ("inst".equals(id)) {
if (instrumentChunkSeen) {
dupChunkError(info, "Instrument");
}
chunk = new InstrumentChunk(this, chunkh, _dstream);
// Only one instrument chunk is allowed
instrumentChunkSeen = true;
} else if ("mext".equals(id)) {
if (mpegChunkSeen) {
dupChunkError(info, "MPEG");
}
chunk = new MpegChunk(this, chunkh, _dstream);
// I think only one MPEG chunk is allowed
mpegChunkSeen = true;
} else if ("cart".equals(id)) {
if (cartChunkSeen) {
dupChunkError(info, "Cart");
}
chunk = new CartChunk(this, chunkh, _dstream);
cartChunkSeen = true;
} else if ("bext".equals(id)) {
if (broadcastExtChunkSeen) {
dupChunkError(info, "Broadcast Audio Extension");
}
chunk = new BroadcastExtChunk(this, chunkh, _dstream);
broadcastExtChunkSeen = true;
} else if ("levl".equals(id)) {
if (peakChunkSeen) {
dupChunkError(info, "Peak Envelope");
}
chunk = new PeakEnvelopeChunk(this, chunkh, _dstream);
peakChunkSeen = true;
} else if ("link".equals(id)) {
if (linkChunkSeen) {
dupChunkError(info, "Link");
}
chunk = new LinkChunk(this, chunkh, _dstream);
linkChunkSeen = true;
} else if ("cue ".equals(id)) {
if (cueChunkSeen) {
dupChunkError(info, "Cue");
}
chunk = new CueChunk(this, chunkh, _dstream);
cueChunkSeen = true;
} else {
info.setMessage(new InfoMessage("Chunk type '" + id + "' ignored", _nByte));
}
if (chunk != null) {
if (!chunk.readChunk(info)) {
return false;
}
} else {
// Other chunk types are legal, just skip over them
skipBytes(_dstream, chunkSize, this);
}
if ((chunkSize & 1) != 0) {
// Must come out to an even byte boundary
skipBytes(_dstream, 1, this);
--bytesRemaining;
}
return true;
}
