libavcodec/h261dec.c:243: error: Integer Overflow L2
  ([0, `bc->bits_left` + 95] - 1):unsigned32 by call to `bitstream_read_bit`.

libavcodec/h261dec.c:233:1: Parameter `bc->bits_left`
231. };
232. 
233. static int decode_mv_component(BitstreamContext *bc, int v)
     ^
234. {
235.     int mv_diff = bitstream_read_vlc(bc, h261_mv_vlc.table, H261_MV_VLC_BITS, 2);

libavcodec/h261dec.c:235:19: Call
233. static int decode_mv_component(BitstreamContext *bc, int v)
234. {
235.     int mv_diff = bitstream_read_vlc(bc, h261_mv_vlc.table, H261_MV_VLC_BITS, 2);
                       ^
236. 
237.     /* check if mv_diff is valid */

libavcodec/bitstream.h:313:1: Parameter `(*table)[*]`
  311.  * If the VLC code is invalid and max_depth > 1, then the number of bits removed
  312.  * is undefined. */
  313. static inline int bitstream_read_vlc(BitstreamContext *bc, VLC_TYPE (*table)[2],
       ^
  314.                                      int bits, int max_depth)
  315. {

libavcodec/bitstream.h:319:5: Assignment
  317.     unsigned idx = bitstream_peek(bc, bits);
  318.     int code = table[idx][0];
  319.     int n    = table[idx][1];
           ^
  320. 
  321.     if (max_depth > 1 && n < 0) {

libavcodec/bitstream.h:329:5: Call
  327.         }
  328.     }
  329.     skip_remaining(bc, n);
           ^
  330. 
  331.     return code;

libavcodec/bitstream.h:230:1: Parameter `n`
    228. }
    229. 
    230. static inline void skip_remaining(BitstreamContext *bc, unsigned n)
         ^
    231. {
    232. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:237:5: Assignment
    235.     bc->bits <<= n;
    236. #endif
    237.     bc->bits_left -= n;
             ^
    238. }
    239. 

libavcodec/h261dec.c:243:21: Call
241.     mv_diff = mvmap[mv_diff];
242. 
243.     if (mv_diff && !bitstream_read_bit(bc))
                         ^
244.         mv_diff = -mv_diff;
245. 

libavcodec/bitstream.h:145:1: Parameter `bc->bits_left`
  143. 
  144. /* Return one bit from the buffer. */
  145. static inline unsigned bitstream_read_bit(BitstreamContext *bc)
       ^
  146. {
  147.     if (!bc->bits_left)

libavcodec/bitstream.h:150:12: Call
  148.         refill_64(bc);
  149. 
  150.     return get_val(bc, 1);
                  ^
  151. }
  152. 

libavcodec/bitstream.h:130:1: <LHS trace>
128. }
129. 
130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
     ^
131. {
132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:130:1: Parameter `bc->bits_left`
    128. }
    129. 
    130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
         ^
    131. {
    132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:130:1: <RHS trace>
128. }
129. 
130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
     ^
131. {
132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:130:1: Parameter `n`
    128. }
    129. 
    130. static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
         ^
    131. {
    132. #ifdef BITSTREAM_READER_LE

libavcodec/bitstream.h:139:5: Binary operation: ([0, bc->bits_left + 95] - 1):unsigned32 by call to `bitstream_read_bit` 
    137.     bc->bits <<= n;
    138. #endif
    139.     bc->bits_left -= n;
             ^
    140. 
    141.     return ret;
