Fix extremely rare infinite loop in 2-pass VBV

Implicit conversion from double->float lost enough precision to cause the loop termination condition to never trigger.
Bug report by Tal Aloni.

diff --git a/encoder/ratecontrol.c b/encoder/ratecontrol.c
index 06911421b3f63922679f921b3357885536cc2ea7..49e88f70f1caf9257ada37ec9717f7a2a15a9fd6 100644 (file)
--- a/encoder/ratecontrol.c
+++ b/encoder/ratecontrol.c
@@ -37,13 +37,13 @@ typedef struct
 {
     int pict_type;
     int kept_as_ref;
-    float qscale;
+    double qscale;
     int mv_bits;
     int tex_bits;
     int misc_bits;
     uint64_t expected_bits; /*total expected bits up to the current frame (current one excluded)*/
     double expected_vbv;
-    float new_qscale;
+    double new_qscale;
     int new_qp;
     int i_count;
     int p_count;