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Fix overflow in digital AGC1

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Bug: chromium:855900
Change-Id: I966d5d977cee2862f7c0dd07e35561e475269d20
Reviewed-on: https://webrtc-review.googlesource.com/85368
Reviewed-by: Alex Loiko <aleloi@google.com>
Commit-Queue: Sam Zackrisson <saza@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23737}
This commit is contained in:
Sam Zackrisson
2018-06-26 11:21:22 +02:00
committed by Commit Bot
parent f4db542a9b
commit 762289ed13
1 changed files with 4 additions and 2 deletions
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6
modules/audio_processing/agc/legacy/digital_agc.c
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@ -412,8 +412,10 @@ int32_t WebRtcAgc_ProcessDigital(DigitalAgc* stt,
}
tmp32 = ((uint32_t)cur_level << zeros) & 0x7FFFFFFF;
frac = (int16_t)(tmp32 >> 19); // Q12.
tmp32 = (stt->gainTable[zeros - 1] - stt->gainTable[zeros]) * frac;
gains[k + 1] = stt->gainTable[zeros] + (tmp32 >> 12);
// Interpolate between gainTable[zeros] and gainTable[zeros-1].
tmp32 = ((stt->gainTable[zeros - 1] - stt->gainTable[zeros]) *
(int64_t)frac) >> 12;
gains[k + 1] = stt->gainTable[zeros] + tmp32;
#ifdef WEBRTC_AGC_DEBUG_DUMP
if (k == 0) {
fprintf(stt->logFile, "%d\t%d\t%d\t%d\t%d\n", env[0], cur_level,