[x264-devel] [PATCH] Fix index out-of-bound

[Vitaly Buka]

From: Vitaly Buka <vitalybuka at gmail.com>

rcc->last_non_b_pict_type can be -1 in cases when last_non_b_q even
not used.
---
 encoder/ratecontrol.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/encoder/ratecontrol.c b/encoder/ratecontrol.c
index 1598b508..06359442 100644
--- a/encoder/ratecontrol.c
+++ b/encoder/ratecontrol.c
@@ -2031,7 +2031,6 @@ static double get_diff_limited_q(x264_t *h, ratecontrol_entry_t *rce, double q,
 
     // force I/B quants as a function of P quants
     const double last_p_q    = rcc->last_qscale_for[SLICE_TYPE_P];
-    const double last_non_b_q= rcc->last_qscale_for[rcc->last_non_b_pict_type];
     if( pict_type == SLICE_TYPE_I )
     {
         double iq = q;
@@ -2050,7 +2049,7 @@ static double get_diff_limited_q(x264_t *h, ratecontrol_entry_t *rce, double q,
     else if( pict_type == SLICE_TYPE_B )
     {
         if( h->param.rc.f_pb_factor > 0 )
-            q = last_non_b_q;
+            q = rcc->last_qscale_for[rcc->last_non_b_pict_type];
         if( !rce->kept_as_ref )
             q *= fabs( h->param.rc.f_pb_factor );
     }
-- 
2.26.0.110.g2183baf09c-goog