58 lines
2.3 KiB
C#
58 lines
2.3 KiB
C#
using System;
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using System.Collections.Generic;
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namespace BizHawk.Client.Common
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{
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public class PlatformFrameRates
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{
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public double this[string systemId, bool pal]
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{
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get
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{
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var key = systemId + (pal ? "_PAL" : String.Empty);
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if (_rates.ContainsKey(key))
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{
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return _rates[key];
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}
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else
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{
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return 60.0;
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}
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}
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}
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//these are political numbers, designed to be in accord with tasvideos.org tradition. theyre not necessarily mathematical factualities (although they may be in some cases)
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//it would be nice if we could turn this into a rational expression natively, and also, to write some comments about the derivation and ideal valees (since this seems to be where theyre all collected)
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//are we collecting them anywhere else? for avi-writing code perhaps?
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private static Dictionary<string, double> _rates = new Dictionary<string, double>
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{
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{ "NES", 60.098813897440515532 }, //discussion here: http://forums.nesdev.com/viewtopic.php?t=492 ; a rational expression would be (19687500 / 11) / ((341*262-0.529780.5)/3) -> (118125000 / 1965513) -> 60.098813897440515529533511098629 (so our chosen number is very close)
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{ "NES_PAL", 50.006977968268290849 },
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{ "FDS", 60.098813897440515532 },
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{ "FDS_PAL", 50.006977968268290849 },
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{ "SNES", (double)21477272 / (4 * 341 * 262) },
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{ "SNES_PAL", (double)21281370 / (4 * 341 * 312) },
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{ "SGB", (double)21477272 / (4 * 341 * 262) },
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{ "SGB_PAL", (double)21281370 / (4 * 341 * 312) },
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{ "PCE", (7159090.90909090 / 455 / 263) }, // ~59.826
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{ "PCECD", (7159090.90909090 / 455 / 263) }, // ~59.826
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{ "SMS", (3579545 / 262.0 / 228.0) },
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{ "SMS_PAL", (3546893 / 313.0 / 228.0) },
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{ "GG", (3579545 / 262.0 / 228.0) },
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{ "GG_PAL", (3546893 / 313.0 / 228.0) },
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{ "SG", (3579545 / 262.0 / 228.0) },
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{ "SG_PAL", (3546893 / 313.0 / 228.0) },
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{ "NGP", (6144000.0 / (515 * 198)) },
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{ "VBOY", (20000000 / (259 * 384 * 4)) }, // ~50.273
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{ "LYNX", 59.8 },
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{ "WSWAN", (3072000.0 / (159 * 256)) },
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{ "GB", 262144.0 / 4389.0 },
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{ "GBC", 262144.0 / 4389.0 },
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{ "GBA", 262144.0 / 4389.0 },
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{ "A26", 59.9227510135505 },
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{ "A78", 59.9227510135505 },
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{ "Coleco", 59.9227510135505 }
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};
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}
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}
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