Exemple #1
0
        public APU(NESCore nes, int sampleRate)
        {
            this.nes        = nes;
            this.sampleRate = sampleRate;
            switch (nes.nesRegion)
            {
            default:
            case SystemType.NTSC:
                CPUClock             = 1789773;
                FPS                  = (CPUClock * 3.0) / 89341.5;
                modeZeroDelay        = 7459;//http://nesdev.parodius.com/bbs/viewtopic.php?p=64281#64281
                modeZeroFrameLengths = new int[] { 7456, 7458, 7458, 7458 };
                modeOneDelay         = 1;
                modeOneFrameLengths  = new int[] { 7458, 7456, 7458, 7458, 7452 };
                break;

            case SystemType.PAL:
                CPUClock             = 1662607;
                FPS                  = (CPUClock * 3.2) / 106392;
                modeZeroDelay        = 8315;
                modeZeroFrameLengths = new int[] { 8314, 8312, 8314, 8314 };
                modeOneDelay         = 1;
                modeOneFrameLengths  = new int[] { 8314, 8314, 8312, 8314, 8312 };
                break;
            }
            if (this.sampleRate == -1)
            {
                this.sampleRate = CPUClock;
            }
            rollingAveWindow = this.sampleRate / 10;
            SetFPS(FPS);
            output = new short[this.sampleRate]; //the buffers really don't need to be this large, but it should prevent overflows when the FPS is set exceptionally low.
            for (int i = 0; i < 32; i++)
            {
                pulseTable[i]      = ((95.52 / (8128.0 / i + 100.0)));
                pulseTableShort[i] = (int)(pulseTable[i] * 0x7FFF); //Half the range for internal channels, half for external.
            }
            for (int i = 0; i < 204; i++)
            {
                tndTable[i]      = ((163.67 / (24329.0 / i + 100.0)));
                tndTableShort[i] = (int)(tndTable[i] * 0x7FFF);
            }
            volume.square1  = 1;
            volume.square2  = 1;
            volume.triangle = 1;
            volume.noise    = 1;
            volume.dmc      = 1;
            volume.external = 1;
            square1         = new Channels.Square(nes, true, true);
            square2         = new Channels.Square(nes, true, false);
            triangle        = new Channels.Triangle(nes);
            noise           = new Channels.Noise(nes);
            dmc             = new Channels.DMC(nes, CPUClock);
            external        = new Channels.External();
        }
Exemple #2
0
 public APU(NESCore nes, int sampleRate)
 {
     this.nes = nes;
     this.sampleRate = sampleRate;
     switch (nes.nesRegion)
     {
         default:
         case SystemType.NTSC:
             CPUClock = 1789773;
             FPS = (CPUClock * 3.0) / 89341.5;
             modeZeroDelay = 7459;//http://nesdev.parodius.com/bbs/viewtopic.php?p=64281#64281
             modeZeroFrameLengths = new int[] { 7456, 7458, 7458, 7458};
             modeOneDelay = 1;
             modeOneFrameLengths = new int[] { 7458, 7456, 7458, 7458, 7452};
             break;
         case SystemType.PAL:
             CPUClock = 1662607;
             FPS = (CPUClock * 3.2) / 106392;
             modeZeroDelay = 8315;
             modeZeroFrameLengths = new int[] { 8314, 8312, 8314, 8314 };
             modeOneDelay = 1;
             modeOneFrameLengths = new int[] { 8314, 8314, 8312, 8314, 8312 };
             break;
     }
     if (this.sampleRate == -1)
         this.sampleRate = CPUClock;
     rollingAveWindow = this.sampleRate / 10;
     SetFPS(FPS);
     output = new short[this.sampleRate]; //the buffers really don't need to be this large, but it should prevent overflows when the FPS is set exceptionally low.
     for (int i = 0; i < 32; i++)
     {
         pulseTable[i] = ((95.52 / (8128.0 / i + 100.0)));
         pulseTableShort[i] = (int)(pulseTable[i] * 0x7FFF); //Half the range for internal channels, half for external.
     }
     for (int i = 0; i < 204; i++)
     {
         tndTable[i] = ((163.67 / (24329.0 / i + 100.0)));
         tndTableShort[i] = (int)(tndTable[i] * 0x7FFF);
     }
     volume.square1 = 1;
     volume.square2 = 1;
     volume.triangle = 1;
     volume.noise = 1;
     volume.dmc = 1;
     volume.external = 1;
     square1 = new Channels.Square(nes, true, true);
     square2 = new Channels.Square(nes, true, false);
     triangle = new Channels.Triangle(nes);
     noise = new Channels.Noise(nes);
     dmc = new Channels.DMC(nes, CPUClock);
     external = new Channels.External();
 }