-// YCbCrInput is for handling planar 8-bit Y'CbCr (also sometimes, usually rather
-// imprecisely, called “YUV”), which is typically what you get from a video decoder.
-// It upsamples planes as needed, using the default linear upsampling OpenGL gives you.
+// YCbCrInput is for handling Y'CbCr (also sometimes, usually rather
+// imprecisely, called “YUV”), which is typically what you get from a video
+// decoder. It supports these formats:
+//
+// * 8-bit planar Y'CbCr, possibly subsampled (e.g. 4:2:0).
+// * 8-bit semiplanar Y'CbCr (Y' in one plane, CbCr in another),
+// possibly subsampled.
+// * 8-bit interleaved (chunked) Y'CbCr, no subsampling (4:4:4 only).
+// * 10-bit interleaved (chunked) Y'CbCr packed into 32-bit words
+// (10:10:10:2), no subsampling (4:4:4 only).
+//
+// For the former case, it upsamples planes as needed, using the default linear
+// upsampling OpenGL gives you. Note that YCbCr422InterleavedInput supports the
+// important special case of 8-bit 4:2:2 interleaved.