commit de959b9d8d8466781e0a042b2ca588d5067e0da5
author Hui Su <huisu@google.com> Fri Mar 29 14:07:15 2019 -0700
committer Hui Su <huisu@google.com> Fri Mar 29 14:29:00 2019 -0700
tree 5169d7150bbd2e9427534717cede704e171bef85
parent 74933f0751aa088cd0ce8ee11f7d42323be487f1

AV1 levels: tier cannot be 1 below level 4.0

According to the spec, seq_tier equal to 1 can only be signaled for
level 4.0 and above.

BUG=aomedia:2332

Change-Id: I0b4fe1d26fb597b112f8634528a2d7c285461cb4

av1/encoder/level.c

diff --git a/av1/encoder/level.c b/av1/encoder/level.c
index 48bb20e..aadbcd1 100644
--- a/av1/encoder/level.c
+++ b/av1/encoder/level.c
@@ -265,6 +265,7 @@
 static double get_min_cr(const AV1LevelSpec *const level_spec, int tier,
                          int is_still_picture, int64_t decoded_sample_rate) {
   if (is_still_picture) return 0.8;
+  if (level_spec->level < SEQ_LEVEL_4_0) tier = 0;
   const double min_cr_basis = tier ? level_spec->high_cr : level_spec->main_cr;
   const double speed_adj =
       (double)decoded_sample_rate / level_spec->max_display_rate;