From 01cf1e204ecc12cbd37622cf1898889293d29a50 Mon Sep 17 00:00:00 2001
From: Comment <tim@gray.(none)>
Date: Sat, 9 Nov 2013 00:41:33 +0000
Subject: cycler relative transitions

---
 rotord/src/rotor.h | 67 +++++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 51 insertions(+), 16 deletions(-)

diff --git a/rotord/src/rotor.h b/rotord/src/rotor.h
index 14397e8..605ee44 100644
--- a/rotord/src/rotor.h
+++ b/rotord/src/rotor.h
@@ -406,6 +406,8 @@ namespace Rotor {
 				UID="93dd9d76-2d09-11e3-9589-5bbbeea1b304";
 				segment=0;
 				segment_start=segment_end=0.0f;
+				prevseg=0;
+				prevseg_start=0.0f;
 				lastframe=0;
 			}
 			Video_cycler(map<string,string> &settings):Video_cycler() {
@@ -423,6 +425,8 @@ namespace Rotor {
 				if(thisframe==lastframe||thisframe==lastframe+1){
 					if (segment!=seg){
 						//start of new segment
+						prevseg=segment;
+						prevseg_start=segment_start;
 						segment=seg;
 						segment_start=((Time_spec)frame).time;
 						//find segment end
@@ -431,7 +435,7 @@ namespace Rotor {
 							testframe=testframe.nextframe();
 						}
 						segment_end=((Time_spec)testframe).time;
-						cerr<<"Video_cycler: segment "<<seg<<" start: "<<segment_start<<" end: "<<segment_end<<endl;
+						cerr<<"Video_cycler: segment "<<seg<<" preroll: "<<prevseg_start<<" start: "<<segment_start<<" end: "<<segment_end<<endl;
 					}
 				}
 				else {
@@ -447,12 +451,21 @@ namespace Rotor {
 						}
 						segment_start=testframe.time;
 						segment=seg;
+						if ((int)inputs[0]->get(testframe)!=seg){
+							prevseg=(int)inputs[0]->get(testframe);
+							//handle previous segment
+							while ((int)inputs[0]->get(testframe)==prevseg&&testframe.frame()>1){
+								testframe=testframe.lastframe();
+							}
+							prevseg_start=testframe.time;
+						}
 
 						testframe=(Time_spec)frame.nextframe();
 						while ((int)inputs[0]->get(testframe)==seg&&testframe.time<frame.duration){
 							testframe=testframe.nextframe();
 						}
 						segment_end=((Time_spec)testframe).time;
+
 						cerr<<"Video_cycler: segment "<<seg<<" start: "<<segment_start<<" end: "<<segment_end<<endl;
 					
 					}
@@ -461,6 +474,14 @@ namespace Rotor {
 				float start_time=(((Time_spec)frame).time-segment_start);
 				float end_time=(((Time_spec)frame).time-segment_end);
 
+				float in_time=(((Time_spec)frame).time-segment_start);
+				//time in seconds for the incoming sequence: starts at 0
+				float out_time=(((Time_spec)frame).time-prevseg_start);
+				 //time in seconds for the outgoing sequence: 
+								//starts at how many seconds the outgoing has got to
+								//so we need the previous segmente duration
+
+
 				Frame_spec inframe=frame;
 				Frame_spec outframe=frame;
 				switch (attributes["time_mode"]->intVal){
@@ -468,8 +489,8 @@ namespace Rotor {
 						inframe=frame;
 						break;
 					case CYCLER_rel:
-						inframe=Frame_spec(start_time,frame.framerate,frame.duration,frame.w,frame.h,frame.audio);
-						outframe=Frame_spec(end_time,frame.framerate,frame.duration,frame.w,frame.h,frame.audio);
+						inframe=Frame_spec(in_time,frame.framerate,frame.duration,frame.w,frame.h,frame.audio);
+						outframe=Frame_spec(out_time,frame.framerate,frame.duration,frame.w,frame.h,frame.audio);
 						break;
 				}
 
@@ -482,20 +503,33 @@ namespace Rotor {
 				//we have 2 times here 
 
 				if (attributes["mode"]->intVal==CYCLER_mix&&image_inputs.size()>1){
-					int im1=((int)inputs[0]->get((Time_spec)frame))%image_inputs.size();
-					int im2=(im1+1)%image_inputs.size();
+					int im1=seg%image_inputs.size();
+					int im2=prevseg%image_inputs.size();
 
-					float f=fmod(inputs[0]->get((Time_spec)frame),1.0f);
-					Image *in1=image_inputs[im1]->get(inframe);
+					float f;					
+					
+					switch (attributes["length_mode"]->intVal){
+						case CYCLER_seconds:
+							f=min(1.0f,in_time/parameters["transition_length"]->value);
+							break;
+						case CYCLER_fraction:
+							f=min(1.0f,(in_time/(segment_end-segment_start))/parameters["transition_length"]->value);
+							break;
+					}
+					
+
+					Image *in1=image_inputs[im1]->get(attributes["time_mode"]->intVal==CYCLER_abs?frame:inframe);
 					if (in1){
-						Image *in2=image_inputs[im2]->get(outframe);
-						if (in2){
-							image=(*in1);
-							image*=(1.0f-f);
-							Image i2=(*in2);
-							i2*=f;
-							image+=i2;
-							return &image;
+						if (f<1.0f) {
+							Image *in2=image_inputs[im2]->get(outframe);
+							if (in2){
+								image=(*in1);
+								image*=f;
+								Image i2=(*in2);
+								i2*=(1.0f-f);
+								image+=i2;
+								return &image;
+							}
 						}
 						return in1;
 					}
@@ -512,7 +546,8 @@ namespace Rotor {
 			Video_cycler* clone(map<string,string> &_settings) { return new Video_cycler(_settings);};
 		private:
 			float segment_start,segment_end;
-			int segment;
+			float prevseg_start;
+			int segment,prevseg;
 			int lastframe;
 	};
 #define VIDEOFRAMES_frame 1
-- 
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