libavcodec/on2avc.c:121: error: Integer Overflow L2
  ([1, +oo] - [3, 5]):unsigned32 by call to `bitstream_read`.

libavcodec/on2avc.c:112:25: Assignment
110. static int on2avc_decode_band_types(On2AVCContext *c, BitstreamContext *bc)
111. {
112.     int bits_per_sect = c->is_long ? 5 : 3;
                             ^
113.     int esc_val = (1 << bits_per_sect) - 1;
114.     int num_bands = c->num_bands * c->num_windows;

libavcodec/on2avc.c:112:5: Assignment
110. static int on2avc_decode_band_types(On2AVCContext *c, BitstreamContext *bc)
111. {
112.     int bits_per_sect = c->is_long ? 5 : 3;
         ^
113.     int esc_val = (1 << bits_per_sect) - 1;
114.     int num_bands = c->num_bands * c->num_windows;

libavcodec/on2avc.c:121:19: Call
119.         run_len   = 1;
120.         do {
121.             run = bitstream_read(bc, bits_per_sect);
                       ^
122.             run_len += run;
123.         } while (run == esc_val);

libavcodec/bitstream.h:183:1: Parameter `n`
  181. 
  182. /* Return n bits from the buffer. n has to be in the 0-32 range. */
  183. static inline uint32_t bitstream_read(BitstreamContext *bc, unsigned n)
       ^
  184. {
  185.     if (!n)

libavcodec/bitstream.h:194:12: Call
  192.     }
  193. 
  194.     return get_val(bc, n);
                  ^
  195. }
  196. 

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: ([1, +oo] - [3, 5]):unsigned32 by call to `bitstream_read` 
    137.     bc->bits <<= n;
    138. #endif
    139.     bc->bits_left -= n;
             ^
    140. 
    141.     return ret;
