tree 48cb1873cf6e35aa00a039b511da1078a641d62b
parent b433f4c40bbcdbaa88258445116a9850b49d5dc1
author Yue Chen <yuec@google.com> 1510962766 -0800
committer Yue Chen <yuec@google.com> 1511050042 +0000

Make the first cdf prob < CDF_PROB_TOP to avoid infinite loop

The probability training tool generates all CDF_PROB_TOP table if
the counts are all zero. Although it means such cases are never
used in actual encoding, in rd cost pre-calculation, we still
sometimes run into such cases and the token cost calcualtion
function cannot handle all-CDF_PROB_TOP cdfs (Will trigger assertion
when debug mode is on).

Change-Id: I259620e210fea0f6e1f7848724fa006fa06da226