First CL to avoid working with wrapping picture ids. After the references of
a frame has been determined they are then unwrapped.
BUG=webrtc:7874
Review-Url: https://codereview.webrtc.org/2985283002
Cr-Commit-Position: refs/heads/master@{#19663}
There is already an Unwrapper in webrtc/modules/include/module_common_types.h,
but we reimplemented it in sequence_number_util.h for a few reasons:
- Such a class belongs in sequence_number_util.h.
- It is a cleaner implementation since we can use the rest of
sequence_number_util.h functionality.
- You can choose at which number the unwrapped sequence should start,
which is used to avoid the edge case when a backward wrap can happen
as the first few numbers are unwrapped.
- This unwrapper can unwrap numbers that does not wrap 8/16/32 bits.
BUG=None
Review-Url: https://codereview.webrtc.org/2977603002
Cr-Commit-Position: refs/heads/master@{#19154}
