libavcodec/tiertexseqv.c:52: error: Integer Overflow L2
  ([1, +oo] - 4):unsigned32 by call to `bitstream_read_signed`.

libavcodec/tiertexseqv.c:52:25: Call
50.         if (bitstream_bits_left(&bc) < 4)
51.             return NULL;
52.         code_table[i] = bitstream_read_signed(&bc, 4);
                            ^
53.         sz += FFABS(code_table[i]);
54.     }

libavcodec/bitstream.h:199:1: Parameter `n`
  197. /* Return n bits from the buffer as a signed integer.
  198.  * n has to be in the 0-32 range. */
  199. static inline int32_t bitstream_read_signed(BitstreamContext *bc, unsigned n)
       ^
  200. {
  201.     return sign_extend(bitstream_read(bc, n), n);

libavcodec/bitstream.h:201:24: Call
  199. static inline int32_t bitstream_read_signed(BitstreamContext *bc, unsigned n)
  200. {
  201.     return sign_extend(bitstream_read(bc, n), n);
                              ^
  202. }
  203. 

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] - 4):unsigned32 by call to `bitstream_read_signed` 
      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 const unsigned char *seq_unpack_rle_block(const unsigned char *src,\n                                                 const unsigned char *src_end,\n                                                 unsigned char *dst, int dst_size)\n{\n    int i, len, sz;\n    BitstreamContext bc;\n    int code_table[64];\n    bitstream_init(&bc, src, (src_end - src) * 8);\n    for (i = 0, sz = 0; i < 64 && sz < dst_size; i++) {\n        if (bitstream_bits_left(&bc) < 4)\n            return NULL;\n        code_table[i] = bitstream_read_signed(&bc, 4);\n        sz += FFABS(code_table[i]);\n    }\n    src += (bitstream_tell(&bc) + 7) / 8;\n    for (i = 0; i < 64 && dst_size > 0; i++) {\n        len = code_table[i];\n        if (len < 0) {\n            len = -len;\n            if (src_end - src < 1)\n                return NULL;\n            memset(dst, *src++, FFMIN(len, dst_size));\n        } else {\n            if (src_end - src < len)\n                return NULL;\n            memcpy(dst, src, FFMIN(len, dst_size));\n            src += len;\n        }\n        dst += len;\n        dst_size -= len;\n    }\n    return src;\n}', 'static inline int32_t bitstream_read_signed(BitstreamContext *bc, unsigned n)\n{\n    return sign_extend(bitstream_read(bc, n), n);\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 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}']