Fix unsigned integer overflow in aacDecoder_UpdateBitStreamCounters()

Bug: 80314771
Test: play AAC content over 2GB
Change-Id: If791305bf95680b945971f9dc5f58495cbf6c8cd

2 files changed, 12 insertions, 10 deletions

diff --git a/libAACdec/include/aacdecoder_lib.h b/libAACdec/include/aacdecoder_lib.h
index e811d04..3a9b910 100644
--- a/libAACdec/include/aacdecoder_lib.h
+++ b/libAACdec/include/aacdecoder_lib.h
@@ -861,14 +861,16 @@ typedef struct {
                                returns AAC_DEC_TRANSPORT_SYNC_ERROR. It will be
                              < 0 if the estimation failed. */
 
-  UINT numTotalBytes; /*!< This is the number of total bytes that have passed
-                         through the decoder. */
-  UINT numBadBytes; /*!< This is the number of total bytes that were considered
-                       with errors from numTotalBytes. */
-  UINT numTotalAccessUnits; /*!< This is the number of total access units that
-                               have passed through the decoder. */
-  UINT numBadAccessUnits;   /*!< This is the number of total access units that
-                               were considered with errors from numTotalBytes. */
+  INT64 numTotalBytes; /*!< This is the number of total bytes that have passed
+                          through the decoder. */
+  INT64
+  numBadBytes; /*!< This is the number of total bytes that were considered
+                  with errors from numTotalBytes. */
+  INT64
+  numTotalAccessUnits;     /*!< This is the number of total access units that
+                              have passed through the decoder. */
+  INT64 numBadAccessUnits; /*!< This is the number of total access units that
+                              were considered with errors from numTotalBytes. */
 
   /* Metadata */
   SCHAR drcProgRefLev; /*!< DRC program reference level. Defines the reference
diff --git a/libAACdec/src/aacdecoder_lib.cpp b/libAACdec/src/aacdecoder_lib.cpp
index cd112b6..d98cf5a 100644
--- a/libAACdec/src/aacdecoder_lib.cpp
+++ b/libAACdec/src/aacdecoder_lib.cpp
@@ -1085,12 +1085,12 @@ static void aacDecoder_UpdateBitStreamCounters(CStreamInfo *pSi,
     INT nBytes;
 
     nBytes = nBits >> 3;
-    pSi->numTotalBytes = (UINT)((INT)pSi->numTotalBytes + nBytes);
+    pSi->numTotalBytes += nBytes;
     if (IS_OUTPUT_VALID(ErrorStatus)) {
       pSi->numTotalAccessUnits++;
     }
     if (IS_DECODE_ERROR(ErrorStatus)) {
-      pSi->numBadBytes = (UINT)((INT)pSi->numBadBytes + nBytes);
+      pSi->numBadBytes += nBytes;
       pSi->numBadAccessUnits++;
     }
   }