Commit 80b437ce authored by Sebastien Alaiwan's avatar Sebastien Alaiwan Committed by Debargha Mukherjee

Clamp inverse transform coefficients

When --enable-coefficient-range-checking isn't specified,
clamp the coefficient at each stage.

The decoder behaviour is unchanged for valid existing AV1 streams.
However, some AV1 bitstreams that would have been rejected by the
decoder as illegal (range check failure) are now legal bitstreams.

There is no impact on video quality for valid bitstreams,
only bitstreams that would have been considered invalid are affected,
and are now considered as valid ones.

BUG=aomedia:30

Change-Id: Ie72ceeb3cb0561e8d3259767b209a4ef3be90438
parent 3fcce0bb
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