bool EffectCompressor::InitPass1()
{
mMax=0.0;
if (!mNormalize)
DisableSecondPass();
// Find the maximum block length required for any track
size_t maxlen = 0;
SelectedTrackListOfKindIterator iter(Track::Wave, mTracks);
WaveTrack *track = (WaveTrack *) iter.First();
while (track) {
maxlen = std::max(maxlen, track->GetMaxBlockSize());
//Iterate to the next track
track = (WaveTrack *) iter.Next();
}
if(mFollow1!=NULL) {
delete[] mFollow1;
mFollow1 = NULL;
}
if(mFollow2!=NULL) {
delete[] mFollow2;
mFollow2 = NULL;
}
// Allocate buffers for the envelope
if(maxlen > 0) {
mFollow1 = new float[maxlen];
mFollow2 = new float[maxlen];
}
mFollowLen = maxlen;
return true;
}
bool EffectBassTreble::InitPass1()
{
mMax=0.0;
// Integer format tracks require headroom to avoid clipping
// when saved between passes (bug 619)
if (mbNormalize) // don't need to calculate this if only doing one pass.
{
// Up to (gain + 6dB) headroom required for treble boost (experimental).
mPreGain = (dB_treble > 0)? (dB_treble + 6.0) : 0.0;
if (dB_bass >= 0)
{
mPreGain = (mPreGain > dB_bass)? mPreGain : dB_bass;
} else {
// Up to 6 dB headroom reaquired for bass cut (experimental)
mPreGain = (mPreGain > 6.0)? mPreGain : 6.0;
}
mPreGain = (exp (log(10.0) * mPreGain / 20)); // to linear
} else {
mPreGain = 1.0; // Unity gain
}
if (!mbNormalize)
DisableSecondPass();
return true;
}
bool EffectCompressor::InitPass1()
{
mMax=0.0;
if (!mNormalize)
DisableSecondPass();
// Find the maximum block length required for any track
size_t maxlen = 0;
SelectedTrackListOfKindIterator iter(Track::Wave, inputTracks());
WaveTrack *track = (WaveTrack *) iter.First();
while (track) {
maxlen = std::max(maxlen, track->GetMaxBlockSize());
//Iterate to the next track
track = (WaveTrack *) iter.Next();
}
mFollow1.reset();
mFollow2.reset();
// Allocate buffers for the envelope
if(maxlen > 0) {
mFollow1.reinit(maxlen);
mFollow2.reinit(maxlen);
}
mFollowLen = maxlen;
return true;
}
