bool EffectNormalize::Process()
{
bool wasLinked = false; // set when a track has a linked (stereo) track
if (mGain == false &&
mDC == false)
return true;
//Iterate over each track
this->CopyInputTracks(); // Set up mOutputTracks.
bool bGoodResult = true;
SelectedTrackListOfKindIterator iter(Track::Wave, mOutputTracks);
WaveTrack *track = (WaveTrack *) iter.First();
mCurTrackNum = 0;
while (track) {
//Get start and end times from track
double trackStart = track->GetStartTime();
double trackEnd = track->GetEndTime();
//Set the current bounds to whichever left marker is
//greater and whichever right marker is less:
mCurT0 = mT0 < trackStart? trackStart: mT0;
mCurT1 = mT1 > trackEnd? trackEnd: mT1;
// Process only if the right marker is to the right of the left marker
if (mCurT1 > mCurT0) {
//Transform the marker timepoints to samples
sampleCount start = track->TimeToLongSamples(mCurT0);
sampleCount end = track->TimeToLongSamples(mCurT1);
//Get the track rate and samples
mCurRate = track->GetRate();
mCurChannel = track->GetChannel();
if(mStereoInd) // do stereo tracks independently (the easy way)
track->GetMinMax(&mMin, &mMax, mCurT0, mCurT1);
else
{
if(!wasLinked) // new mono track or first of a stereo pair
{
track->GetMinMax(&mMin, &mMax, mCurT0, mCurT1);
if(track->GetLinked())
{
wasLinked = true; // so we use these values for the next (linked) track
track = (WaveTrack *) iter.Next(); // get the next one for the max/min
float min, max;
track->GetMinMax(&min, &max, mCurT0, mCurT1);
mMin = min < mMin ? min : mMin;
mMax = max > mMax ? max : mMax;
track = (WaveTrack *) iter.Prev(); // back to the one we are on
}
}
else
wasLinked = false; // second of the stereo pair, next one is mono or first
}
//ProcessOne() (implemented below) processes a single track
if (!ProcessOne(track, start, end))
{
bGoodResult = false;
break;
}
}
//Iterate to the next track
track = (WaveTrack *) iter.Next();
mCurTrackNum++;
}
this->ReplaceProcessedTracks(bGoodResult);
return bGoodResult;
}
