Add more scoped timeline events to decoder. #465

Job	Run time
Build windows-latest \|\| SHARED=OFF \|\| PLATFORM=GLFW	23m 40s
Build windows-latest \|\| SHARED=OFF \|\| PLATFORM=libretro	24m 2s
Build windows-latest \|\| SHARED=OFF \|\| PLATFORM=KHR_DISPLAY	28m 45s
Build windows-latest \|\| SHARED=ON \|\| PLATFORM=GLFW	22m 17s
Build windows-latest \|\| SHARED=ON \|\| PLATFORM=libretro	22m 38s
Build windows-latest \|\| SHARED=ON \|\| PLATFORM=KHR_DISPLAY	21m 54s
Build ubuntu-latest \|\| SHARED=OFF \|\| PLATFORM=GLFW	23m 47s
Build ubuntu-latest \|\| SHARED=OFF \|\| PLATFORM=libretro	21m 49s
Build ubuntu-latest \|\| SHARED=OFF \|\| PLATFORM=KHR_DISPLAY	25m 31s
Build ubuntu-latest \|\| SHARED=ON \|\| PLATFORM=GLFW	20m 24s
Build ubuntu-latest \|\| SHARED=ON \|\| PLATFORM=libretro	20m 37s
Build ubuntu-latest \|\| SHARED=ON \|\| PLATFORM=KHR_DISPLAY	21m 31s
	4h 36m 55s

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