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vp9 level targeting: more strict constraint on min_gf_interval

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min_gf_interval should be no less than min_altref_distance + 1,
as the encoder may produce bitstream with alt-ref distance being
min_gf_interval - 1.

BUG=b/38450599

Change-Id: Ifb733daa643ebc668d1b23e1ce92db94b66dabe8
This commit is contained in:
hui su 2017-06-07 15:50:36 -07:00
parent 9cea3a3c4e
commit 21d2273efa
1 changed files with 9 additions and 3 deletions
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12
vp9/vp9_cx_iface.c
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@ -425,10 +425,16 @@ static void config_target_level(VP9EncoderConfig *oxcf) {
oxcf->worst_allowed_q = vp9_quantizer_to_qindex(63);
// Adjust minimum art-ref distance.
if (oxcf->min_gf_interval <
(int)vp9_level_defs[target_level_index].min_altref_distance)
// min_gf_interval should be no less than min_altref_distance + 1,
// as the encoder may produce bitstream with alt-ref distance being
// min_gf_interval - 1.
if (oxcf->min_gf_interval <=
(int)vp9_level_defs[target_level_index].min_altref_distance) {
oxcf->min_gf_interval =
(int)vp9_level_defs[target_level_index].min_altref_distance;
(int)vp9_level_defs[target_level_index].min_altref_distance + 1;
oxcf->max_gf_interval =
VPXMAX(oxcf->max_gf_interval, oxcf->min_gf_interval);
}
// Adjust maximum column tiles.
if (vp9_level_defs[target_level_index].max_col_tiles <