Updating Opus to release 1.1

silk/log2lin.c

 /***********************************************************************
 Copyright (c) 2006-2011, Skype Limited. All rights reserved.
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
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@@ skipping 23 matching lines @@
 /* Approximation of 2^() (very close inverse of silk_lin2log()) */
 /* Convert input to a linear scale    */
 opus_int32 silk_log2lin( 
     const opus_int32            inLog_Q7            /* I  input on log scale                                            */
 )
 {
     opus_int32 out, frac_Q7;
 
     if( inLog_Q7 < 0 ) {
         return 0;
-    }
+    } else if ( inLog_Q7 >= 3967 ) {
+                return silk_int32_MAX;
+        }
 
     out = silk_LSHIFT( 1, silk_RSHIFT( inLog_Q7, 7 ) );
     frac_Q7 = inLog_Q7 & 0x7F;
     if( inLog_Q7 < 2048 ) {
         /* Piece-wise parabolic approximation */
         out = silk_ADD_RSHIFT32( out, silk_MUL( out, silk_SMLAWB( frac_Q7, silk_SMULBB( frac_Q7, 128 - frac_Q7 ), -174 ) ), 7 );
     } else {
         /* Piece-wise parabolic approximation */
         out = silk_MLA( out, silk_RSHIFT( out, 7 ), silk_SMLAWB( frac_Q7, silk_SMULBB( frac_Q7, 128 - frac_Q7 ), -174 ) );
     }
     return out;
 }