Function cdvdRotationTime

pcsx2/CDVD/CDVD.cpp:827–872

		return CDVD_TYPE_DETCT; //Detecting any kind of disc existing
}
static u32 cdvdRotationTime(CDVD_MODE_TYPE mode)
{
	// CAV rotation is constant (minimum speed to maintain exact speed on outer dge
	if (cdvd.SpindlCtrl & CDVD_SPINDLE_CAV)
	{
		// Calculate rotations per second from RPM
		const float rotationPerSecond = static_cast<float>(((mode == MODE_CDROM) ? CD_MAX_ROTATION_X1 : DVD_MAX_ROTATION_X1) * cdvd.Speed) / 60.0f;
		// Calculate MS per rotation by dividing 1 second of milliseconds by the number of rotations.
		const float msPerRotation = 1000.0f / rotationPerSecond;
		// Calculate how many cycles 1 millisecond takes in IOP clocks, multiply by the time for 1 rotation.
		return static_cast<u32>((static_cast<float>(PSXCLK) / 1000.0f) * msPerRotation);
	}
	else
	{
		int numSectors = 0;
		int offset = 0;

		//CLV adjusts its speed based on where it is on the disc, so we can take the max RPM and use the sector to work it out
		// Sector counts are taken from google for Single layer, Dual layer DVD's and for 700MB CD's
		switch (cdvd.DiscType)
		{
			case CDVD_TYPE_DETCTDVDS:
			case CDVD_TYPE_PS2DVD:
			case CDVD_TYPE_DETCTDVDD:
				numSectors = 2298496;

				u32 layer1Start;
				s32 dualType;
				// Layer 1 needs an offset as it goes back to the middle of the disc
				cdvdReadDvdDualInfo(&dualType, &layer1Start);
				if (cdvd.SeekToSector >= layer1Start)
					offset = layer1Start;
				break;
			default: // Pretty much every CD format
				numSectors = 360000;
				break;
		}
		// CLV speeds are reversed, so the centre is the fastest position.
		const float sectorSpeed = (1.0f - ((static_cast<float>(cdvd.SeekToSector - offset) / numSectors) * 0.60f)) + 0.40f;

		const float rotationPerSecond = static_cast<float>(((mode == MODE_CDROM) ? CD_MAX_ROTATION_X1 : DVD_MAX_ROTATION_X1) * std::min(static_cast<float>(cdvd.Speed), (mode == MODE_CDROM) ? 10.3f : 1.6f) * sectorSpeed) / 60.0f;
		const float msPerRotation = 1000.0f / rotationPerSecond;
		//DevCon.Warning("Rotations per second %f, msPerRotation cycles per ms %f total cycles per ms %d cycles per rotation %d", rotationPerSecond, msPerRotation, (u32)(PSXCLK / 1000), (u32)((PSXCLK / 1000) * msPerRotation));
		return static_cast<u32>((static_cast<float>(PSXCLK) / 1000.0f) * msPerRotation);
	}
}

static uint cdvdBlockReadTime(CDVD_MODE_TYPE mode) noexcept
{