iLBC: Handle a case of bad input data

webrtc/modules/audio_coding/codecs/ilbc/get_cd_vec.h

 /*
  *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 /******************************************************************
 
  iLBC Speech Coder ANSI-C Source Code
 
  WebRtcIlbcfix_GetCbVec.h
 
 ******************************************************************/
 
 #ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_GET_CD_VEC_H_
 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_GET_CD_VEC_H_
 
-void WebRtcIlbcfix_GetCbVec(
-    int16_t *cbvec,   /* (o) Constructed codebook vector */
-    int16_t *mem,   /* (i) Codebook buffer */
+#include <stdbool.h>
+
+#include "defines.h"
+
+// Returns true on success, false on failure. In case of failure, the decoder
+// state may be corrupted and needs resetting.
+bool WebRtcIlbcfix_GetCbVec(
+    int16_t* cbvec, /* (o) Constructed codebook vector */
+    int16_t* mem,   /* (i) Codebook buffer */
     size_t index,   /* (i) Codebook index */
-    size_t lMem,   /* (i) Length of codebook buffer */
-    size_t cbveclen   /* (i) Codebook vector length */
-                            );
+    size_t lMem,    /* (i) Length of codebook buffer */
+    size_t cbveclen /* (i) Codebook vector length */
+    ) WARN_UNUSED_RESULT;
 
 #endif