// what looks like the last frame in an MPEG stream may actually be truncated and somewhere inside it an ID3V1 or Ape tag may actually begin; if that's the case, that "frame" is removed from the stream; then most likely an "Unknown" stream will be detected, followed by an ID3V1 or Ape stream //ttt2 make sure that that is the case; a possibility is that the standard allows the last frame to be shorter than the calculated size, if some condition is met; this seems unlikely, though
void Mp3Handler::checkLastFrameInMpegStream(ifstream_utf8& in)
{
STRM_ASSERT (!m_vpAllStreams.empty());
MpegStream* pStream (dynamic_cast<MpegStream*>(m_vpAllStreams.back()));
if (0 == pStream) {
return;
}
streampos pos (pStream->getLastFramePos());
streampos posNext (pStream->getPos());
posNext += pStream->getSize();
NoteColl notes (0);
for (;;)
{
if (posNext - pos <= 0)
{
//clearPtrContainer(vpNotes);
return;
}
in.clear();
in.seekg(pos);
try
{
DataStream* p (new Id3V240Stream(0, notes, in, m_pFileName));
delete p;
break;
}
catch (const std::bad_alloc&) {
throw;
}
catch (...) //ttt2 replace "..." with something app-specific, to avoid catching system exceptions
{
in.clear();
in.seekg(pos);
}
in.seekg(pos);
try
{
DataStream* p (new ApeStream(0, notes, in));
delete p;
break;
}
catch (const std::bad_alloc&) {
throw;
}
catch (...) //ttt2 replace "..." with something app-specific, to avoid catching system exceptions
{
in.clear();
in.seekg(pos);
}
in.seekg(pos);
try
{
DataStream* p (new Id3V1Stream(0, notes, in));
delete p;
break;
}
catch (const std::bad_alloc&) {
throw;
}
catch (...) //ttt2 replace "..." with something app-specific, to avoid catching system exceptions
{
in.clear();
in.seekg(pos);
}
in.seekg(pos);
try
{
DataStream* p (new LyricsStream(0, notes, in, m_pFileName->s));
delete p;
break;
}
catch (const std::bad_alloc&) {
throw;
}
catch (...) //ttt2 replace "..." with something app-specific, to avoid catching system exceptions
{
in.clear();
in.seekg(pos);
}
try
{
pos = getNextStream(in, pos);
}
catch (const EndOfFile&)
{
return;
}
}
//clearPtrContainer(notes);
pStream->removeLastFrame();
}
