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RewindManager::getUnitString() refactored

This commit is contained in:
thrust26 2017-11-16 14:49:41 +01:00
parent 524548a08a
commit 64c6e97db3
1 changed files with 15 additions and 31 deletions
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46
src/common/RewindManager.cxx
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@ -191,41 +191,25 @@ string RewindManager::getUnitString(Int64 cycles)
const Int64 PAL_FREQ = 1182298; // ~76*312*50
const Int64 freq = isNTSC ? NTSC_FREQ : PAL_FREQ; // = cycles/second
string unit;
Int64 diffUnit;
// TODO: do we need hours here? don't think so
const Int32 NUM_UNITS = 5;
const string UNIT_NAMES[NUM_UNITS] = { "cycle", "scanline", "frame", "second", "minute" };
const Int64 UNIT_CYCLES[NUM_UNITS + 1] = { 1, 76, 76 * scanlines, freq, freq * 60, (Int64)1 << 63 };
stringstream result;
Int32 i;
cycles = abs(cycles);
// use the lower unit up to twice the next unit, except for an exact match of the next unit
// TODO: does the latter make sense, e.g. for ROMs with changing scanlines?
if(cycles < 76 * 2 && cycles % 76 != 0)
{
unit = "cycle";
diffUnit = cycles;
}
else if(cycles < 76 * scanlines * 2 && cycles % (76 * scanlines) != 0)
{
unit = "scanline";
diffUnit = cycles / 76;
}
else if(cycles < freq * 2 && cycles % freq != 0)
{
unit = "frame";
diffUnit = cycles / (76 * scanlines);
}
else if(cycles < freq * 60 * 2 && cycles % (freq * 60) != 0)
{
unit = "second";
diffUnit = cycles / freq;
}
else
{
unit = "minute";
diffUnit = cycles / (freq * 60);
} // TODO: do we need hours here? don't think so
result << diffUnit << " " << unit;
if(diffUnit != 1)
for(i = 0; i < NUM_UNITS - 1; ++i)
{
// use the lower unit up to twice the next unit, except for an exact match of the next unit
// TODO: does the latter make sense, e.g. for ROMs with changing scanlines?
if(cycles < UNIT_CYCLES[i + 1] * 2 && cycles % UNIT_CYCLES[i + 1] != 0)
break;
}
result << cycles / UNIT_CYCLES[i] << " " << UNIT_NAMES[i];
if(cycles / UNIT_CYCLES[i] != 1)
result << "s";
return result.str();