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(video) Update ly_counter

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This commit is contained in:
twinaphex 2015-02-17 22:08:25 +01:00
parent 9bc71a1d3b
commit d0d92e2e6f
2 changed files with 83 additions and 68 deletions
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87
libgambatte/src/video/ly_counter.cpp
View File

@ -19,50 +19,59 @@
#include "ly_counter.h"
#include "../savestate.h"
namespace gambatte {
LyCounter::LyCounter()
: time_(0), lineTime_(0), ly_(0), ds(false)
namespace gambatte
{
setDoubleSpeed(false);
reset(0, 0);
}
void LyCounter::doEvent() {
++ly_;
if (ly_ == 154)
ly_ = 0;
time_ = time_ + lineTime_;
}
LyCounter::LyCounter()
: time_(0)
, lineTime_(0)
, ly_(0)
, ds(false)
{
setDoubleSpeed(false);
reset(0, 0);
}
unsigned long LyCounter::nextLineCycle(const unsigned lineCycle, const unsigned long cycleCounter) const {
unsigned long tmp = time_ + (lineCycle << ds);
if (tmp - cycleCounter > lineTime_)
tmp -= lineTime_;
return tmp;
}
void LyCounter::doEvent()
{
++ly_;
unsigned long LyCounter::nextFrameCycle(const unsigned long frameCycle, const unsigned long cycleCounter) const {
unsigned long tmp = time_ + (((153U - ly()) * 456U + frameCycle) << ds);
if (tmp - cycleCounter > 70224U << ds)
tmp -= 70224U << ds;
return tmp;
}
if (ly_ == 154)
ly_ = 0;
void LyCounter::reset(const unsigned long videoCycles, const unsigned long lastUpdate) {
ly_ = videoCycles / 456;
time_ = lastUpdate + ((456 - (videoCycles - ly_ * 456ul)) << isDoubleSpeed());
}
time_ = time_ + lineTime_;
}
void LyCounter::setDoubleSpeed(const bool ds_in) {
ds = ds_in;
lineTime_ = 456U << ds_in;
}
unsigned long LyCounter::nextLineCycle(const unsigned lineCycle, const unsigned long cc) const
{
unsigned long tmp = time_ + (lineCycle << ds);
if (tmp - cc > lineTime_)
tmp -= lineTime_;
return tmp;
}
unsigned long LyCounter::nextFrameCycle(const unsigned long frameCycle, const unsigned long cc) const
{
unsigned long tmp = time_ + (((153U - ly()) * 456U + frameCycle) << ds);
if (tmp - cc > 70224U << ds)
tmp -= 70224U << ds;
return tmp;
}
void LyCounter::reset(const unsigned long videoCycles, const unsigned long lastUpdate)
{
ly_ = videoCycles / 456;
time_ = lastUpdate + ((456 - (videoCycles - ly_ * 456ul)) << isDoubleSpeed());
}
void LyCounter::setDoubleSpeed(const bool ds_in)
{
ds = ds_in;
lineTime_ = 456U << ds_in;
}
}

64
libgambatte/src/video/ly_counter.h
View File

@ -19,37 +19,43 @@
#ifndef LY_COUNTER_H
#define LY_COUNTER_H
namespace gambatte {
namespace gambatte
{
struct SaveState;
struct SaveState;
class LyCounter {
unsigned long time_;
unsigned short lineTime_;
unsigned char ly_;
bool ds;
public:
LyCounter();
void doEvent();
bool isDoubleSpeed() const { return ds; }
unsigned long frameCycles(const unsigned long cc) const {
return ly_ * 456ul + lineCycles(cc);
}
unsigned lineCycles(const unsigned long cc) const {
return 456u - ((time_ - cc) >> isDoubleSpeed());
}
unsigned lineTime() const { return lineTime_; }
unsigned ly() const { return ly_; }
unsigned long nextLineCycle(unsigned lineCycle, unsigned long cycleCounter) const;
unsigned long nextFrameCycle(unsigned long frameCycle, unsigned long cycleCounter) const;
void reset(unsigned long videoCycles, unsigned long lastUpdate);
void setDoubleSpeed(bool ds_in);
unsigned long time() const { return time_; }
};
class LyCounter
{
public:
LyCounter();
void doEvent();
bool isDoubleSpeed() const { return ds; }
unsigned long frameCycles(const unsigned long cc) const
{
return ly_ * 456ul + lineCycles(cc);
}
unsigned lineCycles(const unsigned long cc) const
{
return 456u - ((time_ - cc) >> isDoubleSpeed());
}
unsigned lineTime() const { return lineTime_; }
unsigned ly() const { return ly_; }
unsigned long nextLineCycle(unsigned lineCycle, unsigned long cycleCounter) const;
unsigned long nextFrameCycle(unsigned long frameCycle, unsigned long cycleCounter) const;
void reset(unsigned long videoCycles, unsigned long lastUpdate);
void setDoubleSpeed(bool ds_in);
unsigned long time() const { return time_; }
private:
unsigned long time_;
unsigned short lineTime_;
unsigned char ly_;
bool ds;
};
}