/* set up and run a processor */
void
CrossFadePlugin::setupAndProcess(OFX::ImageBlenderBase &processor, const OFX::RenderArguments &args)
{
// get a dst image
std::auto_ptr<OFX::Image> dst(dstClip_->fetchImage(args.time));
OFX::BitDepthEnum dstBitDepth = dst->getPixelDepth();
OFX::PixelComponentEnum dstComponents = dst->getPixelComponents();
// fetch the two source images
std::auto_ptr<OFX::Image> fromImg(fromClip_->fetchImage(args.time));
std::auto_ptr<OFX::Image> toImg(toClip_->fetchImage(args.time));
// make sure bit depths are sane
if(fromImg.get()) checkComponents(*fromImg, dstBitDepth, dstComponents);
if(toImg.get()) checkComponents(*toImg, dstBitDepth, dstComponents);
// get the transition value
float blend = (float)transition_->getValueAtTime(args.time);
// set the images
processor.setDstImg(dst.get());
processor.setFromImg(fromImg.get());
processor.setToImg(toImg.get());
// set the render window
processor.setRenderWindow(args.renderWindow);
// set the scales
processor.setBlend(blend);
// Call the base class process member, this will call the derived templated process code
processor.process();
}
/* set up and run a processor */
void
RetimerPlugin::setupAndProcess(OFX::ImageBlenderBase &processor, const OFX::RenderArguments &args)
{
// get a dst image
std::auto_ptr<OFX::Image> dst(dstClip_->fetchImage(args.time));
OFX::BitDepthEnum dstBitDepth = dst->getPixelDepth();
OFX::PixelComponentEnum dstComponents = dst->getPixelComponents();
// figure the frame we should be retiming from
double sourceTime;
if(getContext() == OFX::eContextRetimer) {
// the host is specifying it, so fetch it from the "sourceTime" pseudo-param
sourceTime = sourceTime_->getValueAtTime(args.time);
}
else {
// we have our own param, which is a speed, so we integrate it to get the time we want
sourceTime = speed_->integrate(0, args.time);
}
// figure the two images we are blending between
double fromTime, toTime;
double blend;
if(args.fieldToRender == OFX::eFieldNone) {
// unfielded, easy peasy
fromTime = floor(sourceTime);
toTime = fromTime + 1;
blend = sourceTime - fromTime;
}
else {
// Fielded clips, pook. We are rendering field doubled images,
// and so need to blend between fields, not frames.
double frac = sourceTime - floor(sourceTime);
if(frac < 0.5) {
// need to go between the first and second fields of this frame
fromTime = floor(sourceTime); // this will get the first field
toTime = fromTime + 0.5; // this will get the second field of the same frame
blend = frac * 2.0; // and the blend is between those two
}
else { // frac > 0.5
fromTime = floor(sourceTime) + 0.5; // this will get the second field of this frame
toTime = floor(sourceTime) + 1.0; // this will get the first field of the next frame
blend = (frac - 0.5) * 2.0;
}
}
// fetch the two source images
std::auto_ptr<OFX::Image> fromImg(srcClip_->fetchImage(fromTime));
std::auto_ptr<OFX::Image> toImg(srcClip_->fetchImage(toTime));
// make sure bit depths are sane
if(fromImg.get()) checkComponents(*fromImg, dstBitDepth, dstComponents);
if(toImg.get()) checkComponents(*toImg, dstBitDepth, dstComponents);
// set the images
processor.setDstImg(dst.get());
processor.setFromImg(fromImg.get());
processor.setToImg(toImg.get());
// set the render window
processor.setRenderWindow(args.renderWindow);
// set the blend between
processor.setBlend((float)blend);
// Call the base class process member, this will call the derived templated process code
processor.process();
}