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package org.jaudiotagger.audio.asf.io;
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import org.jaudiotagger.audio.asf.data.Chunk;
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import org.jaudiotagger.audio.asf.data.GUID;
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import org.jaudiotagger.audio.asf.data.LanguageList;
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import org.jaudiotagger.audio.asf.util.Utils;
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import java.io.IOException;
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import java.io.InputStream;
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import java.math.BigInteger;
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* Reads and interprets the "Language List Object" of ASF files.<br>
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* @author Christian Laireiter
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public class LanguageListReader implements ChunkReader {
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* The GUID this reader {@linkplain #getApplyingIds() applies to}
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private final static GUID[] APPLYING = { GUID.GUID_LANGUAGE_LIST };
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public boolean canFail() {
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public GUID[] getApplyingIds() {
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return APPLYING.clone();
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public Chunk read(final GUID guid, final InputStream stream,
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final long streamPosition) throws IOException {
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assert GUID.GUID_LANGUAGE_LIST.equals(guid);
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final BigInteger chunkLen = Utils.readBig64(stream);
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final int readUINT16 = Utils.readUINT16(stream);
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final LanguageList result = new LanguageList(streamPosition, chunkLen);
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for (int i = 0; i < readUINT16; i++) {
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final int langIdLen = (stream.read() & 0xFF);
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final String langId = Utils
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.readFixedSizeUTF16Str(stream, langIdLen);
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// langIdLen = 2 bytes for each char and optionally one zero
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// termination character
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assert langId.length() == langIdLen / 2 - 1
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|| langId.length() == langIdLen / 2;
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result.addLanguage(langId);
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package org.jaudiotagger.audio.asf.io;
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import org.jaudiotagger.audio.asf.data.Chunk;
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import org.jaudiotagger.audio.asf.data.GUID;
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import org.jaudiotagger.audio.asf.data.LanguageList;
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import org.jaudiotagger.audio.asf.util.Utils;
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import java.io.IOException;
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import java.io.InputStream;
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import java.math.BigInteger;
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* Reads and interprets the "Language List Object" of ASF files.<br>
15
* @author Christian Laireiter
17
public class LanguageListReader implements ChunkReader {
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* The GUID this reader {@linkplain #getApplyingIds() applies to}
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private final static GUID[] APPLYING = { GUID.GUID_LANGUAGE_LIST };
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public boolean canFail() {
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public GUID[] getApplyingIds() {
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return APPLYING.clone();
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public Chunk read(final GUID guid, final InputStream stream,
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final long streamPosition) throws IOException {
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assert GUID.GUID_LANGUAGE_LIST.equals(guid);
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final BigInteger chunkLen = Utils.readBig64(stream);
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final int readUINT16 = Utils.readUINT16(stream);
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final LanguageList result = new LanguageList(streamPosition, chunkLen);
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for (int i = 0; i < readUINT16; i++) {
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final int langIdLen = (stream.read() & 0xFF);
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final String langId = Utils
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.readFixedSizeUTF16Str(stream, langIdLen);
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// langIdLen = 2 bytes for each char and optionally one zero
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// termination character
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assert langId.length() == langIdLen / 2 - 1
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|| langId.length() == langIdLen / 2;
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result.addLanguage(langId);