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Fixes integer overflow in SILK VAD for 10-ms frames

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Reported by Chandrakala Madhira on the mailing list
This commit is contained in:
Jean-Marc Valin 2018-02-16 12:36:44 -05:00
parent 4503261d0f
commit 4b6af2da93
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GPG key ID: 5E5DD9A36F9189C8
1 changed files with 5 additions and 6 deletions
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11
silk/VAD.c
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@ -252,15 +252,14 @@ opus_int silk_VAD_GetSA_Q8_c( /* O Return v
speech_nrg += ( b + 1 ) * silk_RSHIFT( Xnrg[ b ] - psSilk_VAD->NL[ b ], 4 );
}
if( psEncC->frame_length == 20 * psEncC->fs_kHz ) {
speech_nrg = silk_RSHIFT32( speech_nrg, 1 );
}
/* Power scaling */
if( speech_nrg <= 0 ) {
SA_Q15 = silk_RSHIFT( SA_Q15, 1 );
} else if( speech_nrg < 32768 ) {
if( psEncC->frame_length == 10 * psEncC->fs_kHz ) {
speech_nrg = silk_LSHIFT_SAT32( speech_nrg, 16 );
} else {
speech_nrg = silk_LSHIFT_SAT32( speech_nrg, 15 );
}
} else if( speech_nrg < 16384 ) {
speech_nrg = silk_LSHIFT32( speech_nrg, 16 );
/* square-root */
speech_nrg = silk_SQRT_APPROX( speech_nrg );