avformat/utils: Fix division by 0

[ffmpeg] / libavformat / mpc8.c

diff --git a/libavformat/mpc8.c b/libavformat/mpc8.c
index 722d0ee05f6c6c7c0cc35c305b60f6500a4ebe0f..684a0eeae04b08f2b59aacb394da2e2a106a2e13 100644 (file)
--- a/libavformat/mpc8.c
+++ b/libavformat/mpc8.c
@@ -57,7 +57,7 @@ typedef struct {
 
 static inline int64_t bs_get_v(const uint8_t **bs)
 {
-    int64_t v = 0;
+    uint64_t v = 0;
     int br = 0;
     int c;
 
@@ -91,7 +91,7 @@ static int mpc8_probe(AVProbeData *p)
         size = bs_get_v(&bs);
         if (size < 2)
             return 0;
-        if (bs + size - 2 >= bs_end)
+        if (size >= bs_end - bs + 2)
             return AVPROBE_SCORE_EXTENSION - 1; // seems to be valid MPC but no header yet
         if (header_found) {
             if (size < 11 || size > 28)
@@ -108,7 +108,7 @@ static int mpc8_probe(AVProbeData *p)
 
 static inline int64_t gb_get_v(GetBitContext *gb)
 {
-    int64_t v = 0;
+    uint64_t v = 0;
     int bits = 0;
     while(get_bits1(gb) && bits < 64-7){
         v <<= 7;