CMakeFiles: Compile as C++14

OpenGL: Check for framebuffer completeness

Dummy implementation dlp:SRVR Service.

cecd:u: stub GetCecInfoEventHandle, GetChangeStateEventHandle

GSP: Return proper error codes for register writes

Avoid warnings by casting to size_t for ARRAY_SIZE() comparisons

Prevent cache overflow when single stepping

Add gsp functions: SetAxiConfigQoSMode, UnregisterInterruptRelayQueue

DSP: Implement audio filters (simple, biquad)

Add common methods to all cfg:* ports

Compilation fix

Fix Qt string encode problem on Windows

Remove unnecessary const & replace pointer with reference

hid: implement accelerometer and gyroscope back-end

DSP: Implement audio codecs (PCM8, PCM16, ADPCM)

Immediate-mode improvements

This partially fixes Etrian Odyssey IV.

Our code did not handle this well, causing random crashes in some
situations.

fix SDL2 detection for Visual

Respect vs output map

archive_extsavedata: Fix member initialization order