*) minor changes git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@7403 6c8d7289-2bf4-0310-a012-ef5d649a1542pull/1/head
low012
14 years ago
parent
ee3cef91e8
commit
11ea966f9e
@ -0,0 +1,133 @@
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/**
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* sidAudioParser
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* Copyright 2010 by Marc Nause, marc.nause@gmx.de, Braunschweig, Germany
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* First released 28.12.2010 at http://yacy.net
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*
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* $LastChangedDate$
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* $LastChangedRevision$
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* $LastChangedBy$
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.yacy.document.parser;
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import java.io.IOException;
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import java.io.InputStream;
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import java.nio.charset.Charset;
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import java.util.HashMap;
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import java.util.Map;
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import net.yacy.cora.document.MultiProtocolURI;
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import net.yacy.document.AbstractParser;
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import net.yacy.document.Document;
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import net.yacy.document.Parser;
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// this is a new implementation of this parser idiom using multiple documents as result set
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/**
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* Parser for Commodore 64 SID audio files.
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* @see <a href="http://cpansearch.perl.org/src/LALA/Audio-SID-3.11/SID_file_format.txt">
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* SID file format description</a>
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* @author low012
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*/
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public class sidAudioParser extends AbstractParser implements Parser {
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public sidAudioParser() {
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super("Commodore 64 SID audio file Parser");
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SUPPORTED_EXTENSIONS.add("sid");
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SUPPORTED_MIME_TYPES.add("audio/prs.sid");
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SUPPORTED_MIME_TYPES.add("audio/psid");
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SUPPORTED_MIME_TYPES.add("audio/x-psid");
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SUPPORTED_MIME_TYPES.add("audio/sidtune");
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SUPPORTED_MIME_TYPES.add("audio/x-sidtune");
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}
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public Document[] parse(final MultiProtocolURI location, final String mimeType,
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final String charset, final InputStream source)
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throws Parser.Failure, InterruptedException
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{
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try {
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final int available = source.available();
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final byte[] b = new byte[available];
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if (available >= 128 && source.read(b) >= 128) {
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final int version = (b[4] << 2) + b[5];
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Map<String, String> header = new HashMap<String, String>();
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switch (version) {
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case 1:
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header = parseHeader(b);
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break;
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case 2:
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header = parseHeader(b);
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break;
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default:
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throw new Parser.Failure("Unable to parse SID file, unexpected version: " + version, location);
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}
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return new Document[]{new Document(location,
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mimeType,
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"UTF-8",
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null,
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null,
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header.get("name"),
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header.get("author"),
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header.get("publisher"),
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null,
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null,
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null,
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null,
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null,
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null,
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false)};
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} else {
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throw new Parser.Failure("Unable to parse SID file, file does seems to be incomplete (len = " + available + ").", location);
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}
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} catch (IOException ex) {
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throw new Parser.Failure("Unable to read SID file header.", location, ex);
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}
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}
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/**
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*
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* @param header must contain at least the header of the SID file.
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* @return values parsed from the input data
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*/
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private Map<String, String> parseHeader(final byte[] header) {
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final byte[] name = new byte[32];
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for (int i = 0; i < 32; i++) {
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name[i] = header[i + 16];
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}
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final byte[] author = new byte[32];
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for (int i = 0; i < 32; i++) {
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author[i] = header[i + 48];
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}
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final byte[] copyright = new byte[32];
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for (int i = 0; i < 32; i++) {
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copyright[i] = header[i + 80];
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}
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Map<String, String> ret = new HashMap<String, String>();
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ret.put("name", new String(name, Charset.forName("ISO-8859-1")).trim());
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ret.put("author", new String(author, Charset.forName("ISO-8859-1")).trim());
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ret.put("publisher", new String(copyright, Charset.forName("ISO-8859-1")).trim());
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return ret;
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}
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}
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