Correct SILK encoder gain limit

Ensure that the SILK encoder's log gain is 63, not 64, when encoding
a maximum-value delta gain index of 40.  This matches the decoder
and RFC 6716 4.2.7.4, and prevents an assertion failure in the rare
case that the gain is later independently coded.

1 files changed, 1 insertions, 0 deletions

diff --git a/silk/gain_quant.c b/silk/gain_quant.c
index 64ccd061..ee65245a 100644
--- a/silk/gain_quant.c
+++ b/silk/gain_quant.c
@@ -76,6 +76,7 @@ void silk_gains_quant(
             /* Accumulate deltas */
             if( ind[ k ] > double_step_size_threshold ) {
                 *prev_ind += silk_LSHIFT( ind[ k ], 1 ) - double_step_size_threshold;
+                *prev_ind = silk_min_int( *prev_ind, N_LEVELS_QGAIN - 1 );
             } else {
                 *prev_ind += ind[ k ];
             }