libavformat/movenc.c:269: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned32 by call to `bitstream_read_bit`.

libavformat/movenc.c:260:18: Call
258.     bsid       = bitstream_read(&bc, 5);
259.     bsmod      = bitstream_read(&bc, 3);
260.     acmod      = bitstream_read(&bc, 3);
                      ^
261.     if (acmod == 2) {
262.         bitstream_skip(&bc, 2); // dsurmod

libavcodec/bitstream.h:183:1: Parameter `bc->bits_left`
  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)

libavformat/movenc.c:269:13: Call
267.             bitstream_skip(&bc, 2); // surmixlev
268.     }
269.     lfeon = bitstream_read_bit(&bc);
                 ^
270. 
271.     init_put_bits(&pbc, buf, sizeof(buf));

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

static inline uint64_t get_val(BitstreamContext *bc, unsigned n)
{
#ifdef BITSTREAM_READER_LE
    uint64_t ret = bc->bits & ((UINT64_C(1) << n) - 1);
    bc->bits >>= n;
#else
    uint64_t ret = bc->bits >> (64 - n);
    bc->bits <<= n;
#endif
    bc->bits_left -= n;
    return ret;
}
['static int mov_write_ac3_tag(AVIOContext *pb, MOVTrack *track)\n{\n    BitstreamContext bc;\n    PutBitContext pbc;\n    uint8_t buf[3];\n    int fscod, bsid, bsmod, acmod, lfeon, frmsizecod;\n    if (track->vos_len < 7)\n        return -1;\n    avio_wb32(pb, 11);\n    ffio_wfourcc(pb, "dac3");\n    bitstream_init(&bc, track->vos_data + 4, (track->vos_len - 4) * 8);\n    fscod      = bitstream_read(&bc, 2);\n    frmsizecod = bitstream_read(&bc, 6);\n    bsid       = bitstream_read(&bc, 5);\n    bsmod      = bitstream_read(&bc, 3);\n    acmod      = bitstream_read(&bc, 3);\n    if (acmod == 2) {\n        bitstream_skip(&bc, 2);\n    } else {\n        if ((acmod & 1) && acmod != 1)\n            bitstream_skip(&bc, 2);\n        if (acmod & 4)\n            bitstream_skip(&bc, 2);\n    }\n    lfeon = bitstream_read_bit(&bc);\n    init_put_bits(&pbc, buf, sizeof(buf));\n    put_bits(&pbc, 2, fscod);\n    put_bits(&pbc, 5, bsid);\n    put_bits(&pbc, 3, bsmod);\n    put_bits(&pbc, 3, acmod);\n    put_bits(&pbc, 1, lfeon);\n    put_bits(&pbc, 5, frmsizecod >> 1);\n    put_bits(&pbc, 5, 0);\n    flush_put_bits(&pbc);\n    avio_write(pb, buf, sizeof(buf));\n    return 11;\n}', 'static inline uint32_t bitstream_read(BitstreamContext *bc, unsigned n)\n{\n    if (!n)\n        return 0;\n    if (n > bc->bits_left) {\n        refill_32(bc);\n        if (bc->bits_left < 32)\n            bc->bits_left = n;\n    }\n    return get_val(bc, n);\n}', 'static inline unsigned bitstream_read_bit(BitstreamContext *bc)\n{\n    if (!bc->bits_left)\n        refill_64(bc);\n    return get_val(bc, 1);\n}', 'static inline uint64_t get_val(BitstreamContext *bc, unsigned n)\n{\n#ifdef BITSTREAM_READER_LE\n    uint64_t ret = bc->bits & ((UINT64_C(1) << n) - 1);\n    bc->bits >>= n;\n#else\n    uint64_t ret = bc->bits >> (64 - n);\n    bc->bits <<= n;\n#endif\n    bc->bits_left -= n;\n    return ret;\n}']