bool ID3_TagHeader::Parse(ID3_Reader& reader)
{
io::ExitTrigger et(reader);
if (!ID3_Tag::IsV2Tag(reader))
{
ID3D_NOTICE( "ID3_TagHeader::Parse(): not an id3v2 header" );
return false;
}
uchar id[3];
reader.readChars(id, 3);
// The spec version is determined with the MAJOR and MINOR OFFSETs
uchar major = reader.readChar();
uchar minor = reader.readChar();
this->SetSpec(ID3_VerRevToV2Spec(major, minor));
// Get the flags at the appropriate offset
_flags.set(static_cast<ID3_Flags::TYPE>(reader.readChar()));
// set the data size
this->SetDataSize(io::readUInt28(reader));
if (_flags.test(HEADER_FLAG_EXTENDED) && this->GetSpec() == ID3V2_2_1)
{
//couldn't find anything about this in the draft specifying 2.2.1 -> http://www.id3.org/pipermail/id3v2/2000-April/000126.html
_flags.set(HEADER_FLAG_EXTENDED, false);
_info->extended_bytes = 0;
// rest is checked at ParseExtended()
}
et.setExitPos(reader.getCur());
return true;
}
String io::readText(ID3_Reader& reader, size_t len)
{
String str;
str.reserve(len);
const size_t SIZE = 1024;
ID3_Reader::char_type buf[SIZE];
size_t remaining = len;
while (remaining > 0 && !reader.atEnd())
{
size_t numRead = reader.readChars(buf, min(remaining, SIZE));
remaining -= numRead;
str.append(reinterpret_cast<String::value_type *>(buf), numRead);
}
return str;
}
BString io::readBinary(ID3_Reader& reader, size_t len)
{
BString binary;
binary.reserve(len);
size_t remaining = len;
const size_t SIZE = 1024;
ID3_Reader::char_type buf[SIZE];
while (!reader.atEnd() && remaining > 0)
{
size_t numRead = reader.readChars(buf, min(remaining, SIZE));
remaining -= numRead;
binary.append(reinterpret_cast<BString::value_type *>(buf), numRead);
}
return binary;
}
bool ID3_TagHeader::Parse(ID3_Reader& reader)
{
io::ExitTrigger et(reader);
if (!ID3_Tag::IsV2Tag(reader))
{
ID3D_NOTICE( "ID3_TagHeader::Parse(): not an id3v2 header" );
return false;
}
uchar id[3];
reader.readChars(id, 3);
// The spec version is determined with the MAJOR and MINOR OFFSETs
uchar major = reader.readChar();
uchar minor = reader.readChar();
this->SetSpec(ID3_VerRevToV2Spec(major, minor));
// Get the flags at the appropriate offset
_flags.set(static_cast<ID3_Flags::TYPE>(reader.readChar()));
// set the data size
this->SetDataSize(io::readUInt28(reader));
if (_flags.test(EXTENDED))
{
if (this->GetSpec() == ID3V2_2_1)
{
// okay, if we are ID3v2.2.1, then let's skip over the extended header
// for now because I am lazy
}
if (this->GetSpec() == ID3V2_3_0)
{
// okay, if we are ID3v2.3.0, then let's actually parse the extended
// header (for now, we skip it because we are lazy)
}
}
et.setExitPos(reader.getCur());
return true;
}