--- /dev/null
+/***************************************************************************
+ copyright : (C) 2004 by Allan Sandfeld Jensen
+ email : kde@carewolf.org
+ ***************************************************************************/
+
+/***************************************************************************
+ * This library is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU Lesser General Public License version *
+ * 2.1 as published by the Free Software Foundation. *
+ * *
+ * This library is distributed in the hope that it will be useful, but *
+ * WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
+ * Lesser General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU Lesser General Public *
+ * License along with this library; if not, write to the Free Software *
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
+ * USA *
+ ***************************************************************************/
+
+#include <tbytevector.h>
+#include <tstring.h>
+#include <tdebug.h>
+
+#include <xiphcomment.h>
+#include "oggflacfile.h"
+
+using namespace TagLib;
+using TagLib::FLAC::Properties;
+
+class Ogg::FLAC::File::FilePrivate
+{
+public:
+ FilePrivate() :
+ comment(0),
+ properties(0),
+ streamStart(0),
+ streamLength(0),
+ scanned(false),
+ hasXiphComment(false),
+ commentPacket(0) {}
+
+ ~FilePrivate()
+ {
+ delete comment;
+ delete properties;
+ }
+
+ Ogg::XiphComment *comment;
+
+ Properties *properties;
+ ByteVector streamInfoData;
+ ByteVector xiphCommentData;
+ long streamStart;
+ long streamLength;
+ bool scanned;
+
+ bool hasXiphComment;
+ int commentPacket;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+// public members
+////////////////////////////////////////////////////////////////////////////////
+
+Ogg::FLAC::File::File(const char *file, bool readProperties,
+ Properties::ReadStyle propertiesStyle) : Ogg::File(file)
+{
+ d = new FilePrivate;
+ read(readProperties, propertiesStyle);
+}
+
+Ogg::FLAC::File::~File()
+{
+ delete d;
+}
+
+TagLib::Tag* Ogg::FLAC::File::tag() const
+{
+ return d->comment;
+}
+
+Properties* Ogg::FLAC::File::audioProperties() const
+{
+ return d->properties;
+}
+
+
+void Ogg::FLAC::File::save()
+{
+ d->xiphCommentData = d->comment->render();
+
+ // Create FLAC metadata-block:
+
+ // Put the size in the first 32 bit ( I assume no more than 24 bit are used )
+
+ ByteVector v = ByteVector::fromUInt(d->xiphCommentData.size());
+
+ // Set the type of the metadata-block to be a Xiph / Vorbis comment
+
+ v[0] = 4;
+
+ // Append the comment-data after the 32 bit header
+
+ v.append(d->xiphCommentData);
+
+ // Save the packet at the old spot
+ // FIXME: Use padding if size is increasing
+
+ setPacket(d->commentPacket, v);
+
+ Ogg::File::save();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// private members
+////////////////////////////////////////////////////////////////////////////////
+
+void Ogg::FLAC::File::read(bool readProperties, Properties::ReadStyle propertiesStyle)
+{
+ // Sanity: Check if we really have an Ogg/FLAC file
+
+/*
+ ByteVector oggHeader = packet(0);
+
+ if (oggHeader.mid(28,4) != "fLaC") {
+ debug("Ogg::FLAC::File::read() -- Not an Ogg/FLAC file");
+ setValid(false);
+ return;
+ }*/
+
+ // Look for FLAC metadata, including vorbis comments
+
+ scan();
+
+ if (!d->scanned) {
+ setValid(false);
+ return;
+ }
+
+
+ if(d->hasXiphComment)
+ d->comment = new Ogg::XiphComment(xiphCommentData());
+ else {
+ d->comment = new Ogg::XiphComment();
+ }
+
+
+ if(readProperties)
+ d->properties = new Properties(streamInfoData(), streamLength(), propertiesStyle);
+}
+
+ByteVector Ogg::FLAC::File::streamInfoData()
+{
+ scan();
+ return d->streamInfoData;
+}
+
+ByteVector Ogg::FLAC::File::xiphCommentData()
+{
+ scan();
+ return d->xiphCommentData;
+}
+
+long Ogg::FLAC::File::streamLength()
+{
+ scan();
+ return d->streamLength;
+}
+
+void Ogg::FLAC::File::scan()
+{
+ // Scan the metadata pages
+
+ if(d->scanned)
+ return;
+
+ if(!isValid())
+ return;
+
+ int ipacket = 1;
+ long overhead = 0;
+
+ ByteVector metadataHeader = packet(ipacket);
+
+ if (metadataHeader == ByteVector::null)
+ return;
+
+ ByteVector header = metadataHeader.mid(0,4);
+
+ // Header format (from spec):
+ // <1> Last-metadata-block flag
+ // <7> BLOCK_TYPE
+ // 0 : STREAMINFO
+ // 1 : PADDING
+ // ..
+ // 4 : VORBIS_COMMENT
+ // ..
+ // <24> Length of metadata to follow
+
+ char blockType = header[0] & 0x7f;
+ bool lastBlock = header[0] & 0x80;
+ uint length = header.mid(1, 3).toUInt();
+ overhead += length;
+
+ // Sanity: First block should be the stream_info metadata
+
+ if(blockType != 0) {
+ debug("Ogg::FLAC::File::scan() -- Invalid Ogg/FLAC stream");
+ return;
+ }
+
+ d->streamInfoData = metadataHeader.mid(4,length);
+
+ // Search through the remaining metadata
+
+ while(!lastBlock) {
+ metadataHeader = packet(++ipacket);
+
+ header = metadataHeader.mid(0, 4);
+ blockType = header[0] & 0x7f;
+ lastBlock = header[0] & 0x80;
+ length = header.mid(1, 3).toUInt();
+ overhead += length;
+
+ if(blockType == 1) {
+// debug("Ogg::FLAC::File::scan() -- Padding found");
+ } else
+ if(blockType == 4) {
+// debug("Ogg::FLAC::File::scan() -- Vorbis-comments found");
+ d->xiphCommentData = metadataHeader.mid(4, length);
+ d->hasXiphComment = true;
+ d->commentPacket = ipacket;
+ } else
+ if(blockType > 5) {
+ debug("Ogg::FLAC::File::scan() -- Unknown metadata block");
+ }
+
+ }
+
+ // End of metadata, now comes the datastream
+ d->streamStart = overhead;
+ d->streamLength = File::length() - d->streamStart;
+
+ d->scanned = true;
+}
--- /dev/null
+/***************************************************************************
+ copyright : (C) 2004 by Allan Sandfeld Jensen
+ email : kde@carewolf.org
+ ***************************************************************************/
+
+/***************************************************************************
+ * This library is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU Lesser General Public License version *
+ * 2.1 as published by the Free Software Foundation. *
+ * *
+ * This library is distributed in the hope that it will be useful, but *
+ * WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
+ * Lesser General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU Lesser General Public *
+ * License along with this library; if not, write to the Free Software *
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
+ * USA *
+ ***************************************************************************/
+
+#ifndef TAGLIB_OGGFLACFILE_H
+#define TAGLIB_OGGFLACFILE_H
+
+#include <oggfile.h>
+
+#include <flacproperties.h>
+
+namespace TagLib {
+
+ class Tag;
+
+ //! An implementation of Ogg/FLAC metadata
+
+ /*!
+ * This is implementation of FLAC metadata for Ogg/FLAC files. For native
+ * FLAC files look under the FLAC hiearchy.
+ *
+ * Unlike native FLAC-files, Ogg/FLAC only supports Xiph-comments,
+ * while the audio-properties are the same.
+ */
+
+ namespace Ogg {
+ namespace FLAC {
+
+ using TagLib::FLAC::Properties;
+
+ //! An implementation of TagLib::File with Ogg/FLAC specific methods
+
+ /*!
+ * This implements and provides an interface for Ogg/FLAC files to the
+ * TagLib::Tag and TagLib::AudioProperties interfaces by way of implementing
+ * the abstract TagLib::File API as well as providing some additional
+ * information specific to Ogg/FLAC files.
+ */
+
+ class File : public TagLib::Ogg::File
+ {
+ public:
+ /*!
+ * Contructs an Ogg/FLAC file from \a file. If \a readProperties is true
+ * the file's audio properties will also be read using \a propertiesStyle. * If false, \a propertiesStyle is ignored.
+ */
+ File(const char *file, bool readProperties = true,
+ Properties::ReadStyle propertiesStyle = Properties::Average);
+
+ /*!
+ * Destroys this instance of the File.
+ */
+ virtual ~File();
+
+ /*!
+ * Returns the Tag for this file. This will always be a XiphComment.
+ */
+ virtual TagLib::Tag *tag() const;
+
+ /*!
+ * Returns the FLAC::Properties for this file. If no audio properties
+ * were read then this will return a null pointer.
+ */
+ virtual Properties *audioProperties() const;
+
+ /*!
+ * Save the file. This will primarily save and update the XiphComment.
+ */
+ virtual void save();
+
+ /*!
+ * Returns the length of the audio-stream, used by FLAC::Properties for
+ * calculating the bitrate.
+ */
+ long streamLength();
+
+ private:
+ File(const File &);
+ File &operator=(const File &);
+
+ void read(bool readProperties, Properties::ReadStyle propertiesStyle);
+ void scan();
+ ByteVector streamInfoData();
+ ByteVector xiphCommentData();
+
+ class FilePrivate;
+ FilePrivate *d;
+ };
+ } // namespace FLAC
+ } // namespace Ogg
+} // namespace TagLib
+
+#endif
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