libavcodec/wmaprodec.c:638: error: Integer Overflow L2
  ([1, +oo] - 6):unsigned32 by call to `bitstream_read`.

libavcodec/wmaprodec.c:638:30: Call
636. 
637.     for (i = 0; i < chgroup->num_channels * (chgroup->num_channels - 1) >> 1; i++)
638.         rotation_offset[i] = bitstream_read(&s->bc, 6);
                                  ^
639. 
640.     for (i = 0; i < chgroup->num_channels; i++)

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] - 6):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 void decode_decorrelation_matrix(WMAProDecodeCtx *s,\n                                        WMAProChannelGrp *chgroup)\n{\n    int i;\n    int offset = 0;\n    int8_t rotation_offset[WMAPRO_MAX_CHANNELS * WMAPRO_MAX_CHANNELS];\n    memset(chgroup->decorrelation_matrix, 0, s->avctx->channels *\n           s->avctx->channels * sizeof(*chgroup->decorrelation_matrix));\n    for (i = 0; i < chgroup->num_channels * (chgroup->num_channels - 1) >> 1; i++)\n        rotation_offset[i] = bitstream_read(&s->bc, 6);\n    for (i = 0; i < chgroup->num_channels; i++)\n        chgroup->decorrelation_matrix[chgroup->num_channels * i + i] =\n            bitstream_read_bit(&s->bc) ? 1.0 : -1.0;\n    for (i = 1; i < chgroup->num_channels; i++) {\n        int x;\n        for (x = 0; x < i; x++) {\n            int y;\n            for (y = 0; y < i + 1; y++) {\n                float v1 = chgroup->decorrelation_matrix[x * chgroup->num_channels + y];\n                float v2 = chgroup->decorrelation_matrix[i * chgroup->num_channels + y];\n                int n = rotation_offset[offset + x];\n                float sinv;\n                float cosv;\n                if (n < 32) {\n                    sinv = sin64[n];\n                    cosv = sin64[32 - n];\n                } else {\n                    sinv =  sin64[64 -  n];\n                    cosv = -sin64[n  - 32];\n                }\n                chgroup->decorrelation_matrix[y + x * chgroup->num_channels] =\n                                               (v1 * sinv) - (v2 * cosv);\n                chgroup->decorrelation_matrix[y + i * chgroup->num_channels] =\n                                               (v1 * cosv) + (v2 * sinv);\n            }\n        }\n        offset += i;\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}']