libavcodec/wmaprodec.c:642: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned32 by call to `bitstream_read_bit`.

libavcodec/wmaprodec.c:628:1: Parameter `s->bc.bits_left`
626.  *@param chgroup channel group for which the matrix needs to be calculated
627.  */
628. static void decode_decorrelation_matrix(WMAProDecodeCtx *s,
     ^
629.                                         WMAProChannelGrp *chgroup)
630. {

libavcodec/wmaprodec.c:642:13: Call
640.     for (i = 0; i < chgroup->num_channels; i++)
641.         chgroup->decorrelation_matrix[chgroup->num_channels * i + i] =
642.             bitstream_read_bit(&s->bc) ? 1.0 : -1.0;
                 ^
643. 
644.     for (i = 1; i < chgroup->num_channels; i++) {

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 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 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}']