The idea is that we make just one OS signals handler on the C (CGO) side instead of Go and handle everything there from both, which is needed for proper termination process of multithreaded Libretro cores. But it leads to strange segfaults.
For some reason the Libretro Mupen core breaks the pseudo-random order of channel selection leading to constant skip of the done channel on ticker aka an infinite loop.
- Fixed broken image cache for the first stage RGBA frames. It was not a thread-safe one, which led to image tearing (parts of old images in multiple consecutive frames).
- 180 flip function for the OpenGL coordinate system has been moved into the rotation part.
- Optimized YUV converter.
- Optimized color converters:
- Use __restrict pointers.
- Draw image pixels with the faster bitwise operators and pointer arithmetic as 32/16bit LE numbers (may break on ARM devices like RPi).
- Pass uints for less num conversions.
- Much faster XRGB -> RGBA conversion with Go's stdlib 32bit flip.
- Wrapped RGBA images into a custom struct in order to bypass opacity tests for the standard Go png functions, which needed for the PNG file export. Before that we set RGBx opacity byte explicitly during the pixel format conversions (much slower).
- Made Libretro core shutdown more deterministic. When we run a C core separately from the main Go process we have to make sure that the C core is not doing anything in its syscall while we stopping the emulator. Basically, a blocking call may be suspended on the Go's side while the other goroutines have no knowledge of that.
- Less info level logs.
- Added recording user label.
- Enabled RTCP sender reports by default, which may help with A/V sync.
- Check onMessage webrtc handler if it's set. May crash the program if not.
- Fixed some make dirs permissions.
- Enabled console colors (since MS has finally fixed their bloody Terminal).
- Disable log in some tests.
- Updated deps.
