X-Git-Url: https://vcs.maemo.org/git/?a=blobdiff_plain;f=src%2Ftaglib%2Fmpeg%2Fxingheader.h;fp=src%2Ftaglib%2Fmpeg%2Fxingheader.h;h=1ffc03ddb09755915b31c93ce21955e96a829943;hb=68d60ad21e61d1e3255673985ae19606ceb0c59d;hp=0000000000000000000000000000000000000000;hpb=dca4bf6a28a8b904d45ff26376e667b05063a400;p=someplayer

diff --git a/src/taglib/mpeg/xingheader.h b/src/taglib/mpeg/xingheader.h
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+/***************************************************************************
+    copyright            : (C) 2003 by Ismael Orenstein
+    email                : orenstein@kde.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                                                                   *
+ *                                                                         *
+ *   Alternatively, this file is available under the Mozilla Public        *
+ *   License Version 1.1.  You may obtain a copy of the License at         *
+ *   http://www.mozilla.org/MPL/                                           *
+ ***************************************************************************/
+
+#ifndef TAGLIB_XINGHEADER_H
+#define TAGLIB_XINGHEADER_H
+
+#include "mpegheader.h"
+#include "taglib_export.h"
+
+namespace TagLib {
+
+  class ByteVector;
+
+  namespace MPEG {
+
+    //! An implementation of the Xing VBR headers
+
+    /*!
+     * This is a minimalistic implementation of the Xing VBR headers.  Xing
+     * headers are often added to VBR (variable bit rate) MP3 streams to make it
+     * easy to compute the length and quality of a VBR stream.  Our implementation
+     * is only concerned with the total size of the stream (so that we can
+     * calculate the total playing time and the average bitrate).  It uses
+     * <a href="http://home.pcisys.net/~melanson/codecs/mp3extensions.txt">this text</a>
+     * and the XMMS sources as references.
+     */
+
+    class TAGLIB_EXPORT XingHeader
+    {
+    public:
+      /*!
+       * Parses a Xing header based on \a data.  The data must be at least 16
+       * bytes long (anything longer than this is discarded).
+       */
+      XingHeader(const ByteVector &data);
+
+      /*!
+       * Destroy this XingHeader instance.
+       */
+      virtual ~XingHeader();
+
+      /*!
+       * Returns true if the data was parsed properly and if there is a valid
+       * Xing header present.
+       */
+      bool isValid() const;
+
+      /*!
+       * Returns the total number of frames.
+       */
+      uint totalFrames() const;
+
+      /*!
+       * Returns the total size of stream in bytes.
+       */
+      uint totalSize() const;
+
+      /*!
+       * Returns the offset for the start of this Xing header, given the
+       * version and channels of the frame
+       */
+      // BIC: rename to offset()
+      static int xingHeaderOffset(TagLib::MPEG::Header::Version v,
+                                  TagLib::MPEG::Header::ChannelMode c);
+
+    private:
+      XingHeader(const XingHeader &);
+      XingHeader &operator=(const XingHeader &);
+
+      void parse(const ByteVector &data);
+
+      class XingHeaderPrivate;
+      XingHeaderPrivate *d;
+    };
+  }
+}
+
+#endif