lavc/vvc: Use av_log2 when destination is integer

Signed-off-by: Frank Plowman <post@frankplowman.com>
Signed-off-by: James Almer <jamrial@gmail.com>

libavcodec/vvc/vvc_ctu.c

@@ -257,8 +257,8 @@ static TransformBlock* add_tb(TransformUnit *tu, VVCLocalContext *lc,
     tb->y0 = y0;
     tb->tb_width  = tb_width;
     tb->tb_height = tb_height;
-    tb->log2_tb_width  = log2(tb_width);
-    tb->log2_tb_height = log2(tb_height);
+    tb->log2_tb_width  = av_log2(tb_width);
+    tb->log2_tb_height = av_log2(tb_height);
 
     tb->max_scan_x = tb->max_scan_y = 0;
     tb->min_scan_x = tb->min_scan_y = 0;

libavcodec/vvc/vvc_ps.c

@@ -910,7 +910,7 @@ static void scaling_derive(VVCScalingList *sl, const H266RawAPS *aps)
 {
     for (int id = 0; id < SL_MAX_ID; id++) {
         const int matrix_size   = derive_matrix_size(id);
-        const int log2_size     = log2(matrix_size);
+        const int log2_size     = av_log2(matrix_size);
         const int list_size     = matrix_size * matrix_size;
         int coeff[SL_MAX_MATRIX_SIZE * SL_MAX_MATRIX_SIZE];
         const uint8_t *pred;