mirror of
https://github.com/strawberrymusicplayer/strawberry
synced 2024-12-23 15:08:10 +01:00
106 lines
3.2 KiB
C++
106 lines
3.2 KiB
C++
/***************************************************************************
|
|
copyright : (C) 2015 by Tsuda Kageyu
|
|
email : tsuda.kageyu@gmail.com
|
|
***************************************************************************/
|
|
|
|
/***************************************************************************
|
|
* 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., 51 Franklin Street, Fifth Floor, Boston, MA *
|
|
* 02110-1301 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/ *
|
|
***************************************************************************/
|
|
|
|
#include <tfile.h>
|
|
|
|
#include "id3v1tag.h"
|
|
#include "id3v2header.h"
|
|
#include "apetag.h"
|
|
|
|
#include "tagutils.h"
|
|
|
|
using namespace TagLib;
|
|
|
|
long Utils::findID3v1(File *file)
|
|
{
|
|
if(!file->isValid())
|
|
return -1;
|
|
|
|
file->seek(-128, File::End);
|
|
const long p = file->tell();
|
|
|
|
if(file->readBlock(3) == ID3v1::Tag::fileIdentifier())
|
|
return p;
|
|
|
|
return -1;
|
|
}
|
|
|
|
long Utils::findID3v2(File *file)
|
|
{
|
|
if(!file->isValid())
|
|
return -1;
|
|
|
|
file->seek(0);
|
|
|
|
if(file->readBlock(3) == ID3v2::Header::fileIdentifier())
|
|
return 0;
|
|
|
|
return -1;
|
|
}
|
|
|
|
long Utils::findAPE(File *file, long id3v1Location)
|
|
{
|
|
if(!file->isValid())
|
|
return -1;
|
|
|
|
if(id3v1Location >= 0)
|
|
file->seek(id3v1Location - 32, File::Beginning);
|
|
else
|
|
file->seek(-32, File::End);
|
|
|
|
const long p = file->tell();
|
|
|
|
if(file->readBlock(8) == APE::Tag::fileIdentifier())
|
|
return p;
|
|
|
|
return -1;
|
|
}
|
|
|
|
ByteVector TagLib::Utils::readHeader(IOStream *stream, unsigned int length,
|
|
bool skipID3v2, long *headerOffset)
|
|
{
|
|
if(!stream || !stream->isOpen())
|
|
return ByteVector();
|
|
|
|
const long originalPosition = stream->tell();
|
|
long bufferOffset = 0;
|
|
|
|
if(skipID3v2) {
|
|
stream->seek(0);
|
|
const ByteVector data = stream->readBlock(ID3v2::Header::size());
|
|
if(data.startsWith(ID3v2::Header::fileIdentifier()))
|
|
bufferOffset = ID3v2::Header(data).completeTagSize();
|
|
}
|
|
|
|
stream->seek(bufferOffset);
|
|
const ByteVector header = stream->readBlock(length);
|
|
stream->seek(originalPosition);
|
|
|
|
if(headerOffset)
|
|
*headerOffset = bufferOffset;
|
|
|
|
return header;
|
|
}
|