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iLBC: Handle a case of bad input data

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We detect an unreasonable state (caused by a bad encoded stream)
before it can lead to problems, and handle it by resetting the
decoder.

NOPRESUBMIT=true
BUG=chromium:617124

Review-Url: https://codereview.webrtc.org/2255203002
Cr-Commit-Position: refs/heads/master@{#13888}
This commit is contained in:
kwiberg
2016-08-24 02:46:44 -07:00
committed by Commit bot
parent 0aa9d1808b
commit 619a211562
16 changed files with 211 additions and 99 deletions
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15
webrtc/modules/audio_coding/codecs/ilbc/cb_construct.c
View File

@ -16,6 +16,8 @@
******************************************************************/
#include "cb_construct.h"
#include "defines.h"
#include "gain_dequant.h"
#include "get_cd_vec.h"
@ -24,7 +26,7 @@
* Construct decoded vector from codebook and gains.
*---------------------------------------------------------------*/
void WebRtcIlbcfix_CbConstruct(
bool WebRtcIlbcfix_CbConstruct(
int16_t *decvector, /* (o) Decoded vector */
int16_t *index, /* (i) Codebook indices */
int16_t *gain_index, /* (i) Gain quantization indices */
@ -50,9 +52,12 @@ void WebRtcIlbcfix_CbConstruct(
/* codebook vector construction and construction of total vector */
/* Stack based */
WebRtcIlbcfix_GetCbVec(cbvec0, mem, (size_t)index[0], lMem, veclen);
WebRtcIlbcfix_GetCbVec(cbvec1, mem, (size_t)index[1], lMem, veclen);
WebRtcIlbcfix_GetCbVec(cbvec2, mem, (size_t)index[2], lMem, veclen);
if (!WebRtcIlbcfix_GetCbVec(cbvec0, mem, (size_t)index[0], lMem, veclen))
return false; // Failure.
if (!WebRtcIlbcfix_GetCbVec(cbvec1, mem, (size_t)index[1], lMem, veclen))
return false; // Failure.
if (!WebRtcIlbcfix_GetCbVec(cbvec2, mem, (size_t)index[2], lMem, veclen))
return false; // Failure.
gainPtr = &gain[0];
for (j=0;j<veclen;j++) {
@ -63,5 +68,5 @@ void WebRtcIlbcfix_CbConstruct(
decvector[j] = (int16_t)((a32 + 8192) >> 14);
}
return;
return true; // Success.
}