mirror of
https://github.com/taglib/taglib.git
synced 2025-05-27 21:20:26 -04:00
7fe6647435
a server-side copy/move. git-svn-id: svn://anonsvn.kde.org/home/kde/trunk/kdesupport/taglib@288617 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
92 lines
3.2 KiB
C++
92 lines
3.2 KiB
C++
/***************************************************************************
|
|
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 *
|
|
***************************************************************************/
|
|
|
|
#ifndef TAGLIB_XINGHEADER_H
|
|
#define TAGLIB_XINGHEADER_H
|
|
|
|
#include "mpegheader.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 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 vaild
|
|
* 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
|
|
*/
|
|
static int xingHeaderOffset(TagLib::MPEG::Header::Version v,
|
|
TagLib::MPEG::Header::ChannelMode c);
|
|
|
|
private:
|
|
void parse(const ByteVector &data);
|
|
|
|
class XingHeaderPrivate;
|
|
XingHeaderPrivate *d;
|
|
};
|
|
}
|
|
}
|
|
|
|
#endif
|