//-------------------------------------------------------------------------
bool R::readFrame(AudioFrame& f)
{
if (_seekWanted)
{
_seekWanted = false;
_frameIndex = _seekWantedIdx;
if (_frameIndex >= getFrameCount())
return false;
unsigned long n = getSampleBytes()*getChannelCount();
_pReader->seek(getHeaderLength()+n*_frameIndex);
}
// si on depasse la fin du fichier
unsigned long i, frameCount = getFrameCount();
// the call to getFrameCount() defines _sampleBytes & other stuff
if (_frameIndex >= frameCount)
return false;
if (_selectedChannel > _channelCount)
throw Exception("Unavailable selected channel #"
+ String::valueOf(_selectedChannel), __FILE__, __LINE__);
if (_sampleBytes == 2) // 16 bits
{
if (_channelCount == 1)
f.setData(_pReader->readInt2());
else if (_channelCount == 2)
{
if (_selectedChannel == 0)
{
f.setData(_pReader->readInt2());
_pReader->readInt2();
}
else
{
_pReader->readInt2();
f.setData(_pReader->readInt2());
}
}
else // multi-channels
{
for (i=0; i<_selectedChannel; i++)
_pReader->readInt2();
f.setData(_pReader->readInt2());
for (i++; i<_channelCount; i++)
_pReader->readInt2();
}
}
else if (_sampleBytes == 1) // 8 bits
{
if (_channelCount == 1)
f.setData(_pReader->readChar());
else if (_channelCount == 2)
{
if (_selectedChannel == 0)
{
f.setData(_pReader->readChar());
_pReader->readChar();
}
else
{
_pReader->readChar();
f.setData(_pReader->readChar());
}
}
else // multi-channels
{
for (i=0; i<_selectedChannel; i++)
_pReader->readChar();
f.setData(_pReader->readChar());
for (i++; i<_channelCount; i++)
_pReader->readChar();
}
}
else
throw Exception("Unimplemented code (TODO)", __FILE__, __LINE__);
f.setValidity(true);
_frameIndex++;
return true; // invalid frame
}
