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This adds utilities for doing some common integer operations in the
upcoming math-heavy Cast Streaming patches, and cleans-up some of the
existing code to use them:
1. saturated_cast<>: Casts a larger-sized integer type to a smaller-
sized one, clamping the values to the valid range of the smaller type.
2. Integer division with rounding: CEIL(a ÷ b) and ROUND_NEAREST(a ÷ b).
The templates were defined such that this also works with the std::chrono
duration types.
Change-Id: I995b9363d15e290e8d11ae2ed85918dd95ab6574
Reviewed-on: https://chromium-review.googlesource.com/c/openscreen/+/1705521
Reviewed-by: Yuri Wiitala <miu@chromium.org>
Reviewed-by: Max Yakimakha <yakimakha@chromium.org>
Commit-Queue: Yuri Wiitala <miu@chromium.org>
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