libavcodec/pixlet.c:140: error: Integer Overflow L2
  ([1, +oo] - 16):unsigned32 by call to `bitstream_read`.

libavcodec/pixlet.c:140:22: Call
138.             escape = value + ((1 << nbits) - 1) * cnt1 - 1;
139.         } else {
140.             escape = bitstream_read(bc, 16);
                          ^
141.         }
142. 

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] - 16):unsigned32 by call to `bitstream_read` 
    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 read_low_coeffs(AVCodecContext *avctx, int16_t *dst, size_t size,\n                           size_t width, ptrdiff_t stride)\n{\n    PixletContext *ctx = avctx->priv_data;\n    BitstreamContext *bc = &ctx->bc;\n    unsigned cnt1, nbits, k, j = 0, i = 0;\n    int64_t value, state = 3;\n    int rlen, escape, flag = 0;\n    while (i < size) {\n        nbits = FFMIN(ff_clz((state >> 8) + 3) ^ 0x1F, 14);\n        cnt1 = get_unary(bc, 0, 8);\n        if (cnt1 < 8) {\n            value = bitstream_read(bc, nbits);\n            if (value <= 1) {\n                bitstream_unget(bc, value & 1, 1);\n                value = 1;\n            }\n            escape = value + ((1 << nbits) - 1) * cnt1 - 1;\n        } else {\n            escape = bitstream_read(bc, 16);\n        }\n        value    = -((escape + flag) & 1) | 1;\n        dst[j++] = value * ((escape + flag + 1) >> 1);\n        i++;\n        if (j == width) {\n            j    = 0;\n            dst += stride;\n        }\n        state = 120 * (escape + flag) + state - (120 * state >> 8);\n        flag  = 0;\n        if (state * 4 > 0xFF || i >= size)\n            continue;\n        nbits  = ((state + 8) >> 5) + (state ? ff_clz(state) : 32) - 24;\n        escape = av_mod_uintp2(16383, nbits);\n        cnt1   = get_unary(bc, 0, 8);\n        if (cnt1 > 7) {\n            rlen = bitstream_read(bc, 16);\n        } else {\n            value = bitstream_read(bc, nbits);\n            if (value <= 1) {\n                bitstream_unget(bc, value & 1, 1);\n                value = 1;\n            }\n            rlen = value + escape * cnt1 - 1;\n        }\n        if (i + rlen > size)\n            return AVERROR_INVALIDDATA;\n        i += rlen;\n        for (k = 0; k < rlen; k++) {\n            dst[j++] = 0;\n            if (j == width) {\n                j    = 0;\n                dst += stride;\n            }\n        }\n        state = 0;\n        flag  = rlen < 0xFFFF ? 1 : 0;\n    }\n    bitstream_align(bc);\n    return bitstream_tell(bc) >> 3;\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}']