Exposed more emulator things to devctl api

[ThirteenAG]

Related to #15626

Decided to kickstart some things, to have more flexibility in plugins.

E.g., GTA VCS, now possible to fastforward automatically during loadscreens and mission/cutscene/interior loading.
Also possible to automatically detect actual screen aspect ratio and use that in game, without manually editing ini settings.

devenv_2022_11_26_17_23_03.mp4

Download test version of compatible with new options plugin here:

GTAVCS.PPSSPP.WidescreenFix.zip

Some code examples:

// not implemented yet
short CPad::GetAccelerate(short* pad) {
    if (pad[77] == 0)
    {
        unsigned char rt = 0;
        sceIoDevctl("kemulator:", EMULATOR_DEVCTL__GET_RTRIGGER, NULL, 0, &rt, sizeof(rt));
        if (rt > 30) //deadzone
            return rt;
    }
    return 0;
}

void UnthrottleEmuEnable()
{
    sceIoDevctl("kemulator:", EMULATOR_DEVCTL__TOGGLE_FASTFORWARD, (void*)1, 0, NULL, 0);
}

void UnthrottleEmuDisable()
{
    sceIoDevctl("kemulator:", EMULATOR_DEVCTL__TOGGLE_FASTFORWARD, (void*)0, 0, NULL, 0);
}

...
int UnthrottleEmuDuringLoading = 0;
void GameLoopStuff()
{
    if (UnthrottleEmuDuringLoading)
    {
        uint32_t gMenuActivated = sub_2A9B4(sub_471400()); //inlined on psp
        float gBlackScreenTime = *(float*)(injector.GetGP() + ptr_1334C4);
        if (gBlackScreenTime && !gMenuActivated)
            UnthrottleEmuEnable();
        else
            UnthrottleEmuDisable();
    }
}

        float ar = 0.0f;
        sceIoDevctl("kemulator:", EMULATOR_DEVCTL__GET_ASPECT_RATIO, NULL, 0, &ar, sizeof(ar));
        if (ar)
            fAspectRatio = ar;

[hrydgard]

Just leaving a note that how aspect works (and also the scale) will change when I change how the screen setup works, likely soon (will be fixed to actually match the configured display, and not assume stretch mode).

[ThirteenAG]

Lcs most likely, when I have time, ctw is more tricky, so not sure.

[ThirteenAG]

@bizz91 Found a way to speed up PDA loading in CTW:

ctw.mp4

Original for comparison:

PPSSPPWindows64_2022_12_01_02_06_22.mp4