size_t Read(void * dst, size_t len) override
{
size_t bytesRead = 0;
size_t bytesToRead = len;
while (bytesToRead > 0 && !_done)
{
size_t readLen = _source->Read(dst, _offset, bytesToRead);
if (readLen > 0)
{
dst = (void *)((uintptr_t)dst + readLen);
bytesToRead -= readLen;
bytesRead += readLen;
_offset += readLen;
}
if (_offset >= _source->GetLength())
{
if (_loop == 0)
{
_done = true;
}
else if (_loop == MIXER_LOOP_INFINITE)
{
_offset = 0;
}
else
{
_loop--;
_offset = 0;
}
}
}
return bytesRead;
}
bool SetOffset(uint64 offset) override
{
if (_source != nullptr && offset < _source->GetLength())
{
AudioFormat format = _source->GetFormat();
sint32 samplesize = format.channels * format.BytesPerSample();
_offset = (offset / samplesize) * samplesize;
return true;
}
return false;
}
