Fix usage and overflow bug causing plWin32StreamingSound::GetActualTimeSec() to return absurd values. Needed fix for subtitle timings.

Sources/Plasma/PubUtilLib/plAudio/plDSoundBuffer.cpp

@@ -710,9 +710,9 @@ hsBool	plDSoundBuffer::IsEAXAccelerated( void ) const
 
 //// BytePosToMSecs //////////////////////////////////////////////////////////
 
-UInt32	plDSoundBuffer::BytePosToMSecs( UInt32 bytePos ) const
+UInt32	plDSoundBuffer::BytePosToMSecs(UInt32 bytePos) const
 {
-	return (UInt32)(bytePos * 1000 / (hsScalar)fBufferDesc->fAvgBytesPerSec);
+	return (UInt32)(bytePos / ((hsScalar)fBufferDesc->fAvgBytesPerSec) / 1000.0f);
 }
 
 //// GetBufferBytePos ////////////////////////////////////////////////////////

Sources/Plasma/PubUtilLib/plAudio/plWin32StreamingSound.cpp

@@ -455,21 +455,24 @@ void plWin32StreamingSound::IActuallyStop()
 
 unsigned plWin32StreamingSound::GetByteOffset()
 {
-	if(fDataStream && fDSoundBuffer)
+	if (fDataStream && fDSoundBuffer)
 	{
+		UInt32 totalSize = fDataStream->GetDataSize();
+		UInt32 bytesRemaining = fDataStream->NumBytesLeft();
 		unsigned bytesQueued = fDSoundBuffer->BuffersQueued() * STREAM_BUFFER_SIZE;
 		unsigned offset = fDSoundBuffer->GetByteOffset();
-		long byteoffset = ((fDataStream->GetDataSize() - fDataStream->NumBytesLeft()) - bytesQueued) + offset;
+		long byteoffset = ((totalSize - bytesRemaining) - bytesQueued) + offset;
 
-		return byteoffset < 0 ? fDataStream->GetDataSize() - abs(byteoffset) : byteoffset;
+		return byteoffset < 0 ? totalSize - std::abs(byteoffset) : byteoffset;
 	}
+
 	return 0;
 }
 
 float plWin32StreamingSound::GetActualTimeSec()
 {
-	if(fDataStream && fDSoundBuffer)
-		return fDSoundBuffer->BytePosToMSecs(fDataStream->NumBytesLeft()) / 1000.0f;
+	if (fDataStream && fDSoundBuffer)
+		return fDSoundBuffer->BytePosToMSecs(this->GetByteOffset()) / 1000.0f;
 	return 0.0f;
 }