libavcodec/cavsdec.c:1100: error: Integer Overflow L2
  ([1, +oo] - 4):unsigned32 by call to `bitstream_read`.

libavcodec/cavsdec.c:1100:23: Call
1098.     bitstream_skip(&h->bc, 2); // chroma format
1099.     bitstream_skip(&h->bc, 3); // sample_precision
1100.     h->aspect_ratio = bitstream_read(&h->bc, 4);
                            ^
1101.     frame_rate_code = bitstream_read(&h->bc, 4);
1102.     bitstream_skip(&h->bc, 18); // bit_rate_lower

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` 
    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 decode_seq_header(AVSContext *h)\n{\n    int frame_rate_code;\n    int width, height;\n    h->profile = bitstream_read(&h->bc, 8);\n    h->level   = bitstream_read(&h->bc, 8);\n    bitstream_skip(&h->bc, 1);\n    width  = bitstream_read(&h->bc, 14);\n    height = bitstream_read(&h->bc, 14);\n    if ((h->width || h->height) && (h->width != width || h->height != height)) {\n        avpriv_report_missing_feature(h->avctx,\n                                      "Width/height changing in CAVS");\n        return AVERROR_PATCHWELCOME;\n    }\n    h->width  = width;\n    h->height = height;\n    bitstream_skip(&h->bc, 2);\n    bitstream_skip(&h->bc, 3);\n    h->aspect_ratio = bitstream_read(&h->bc, 4);\n    frame_rate_code = bitstream_read(&h->bc, 4);\n    bitstream_skip(&h->bc, 18);\n    bitstream_skip(&h->bc, 1);\n    bitstream_skip(&h->bc, 12);\n    h->low_delay =  bitstream_read_bit(&h->bc);\n    h->mb_width  = (h->width  + 15) >> 4;\n    h->mb_height = (h->height + 15) >> 4;\n    h->avctx->framerate = ff_mpeg12_frame_rate_tab[frame_rate_code];\n    h->avctx->width  = h->width;\n    h->avctx->height = h->height;\n    if (!h->top_qp)\n        ff_cavs_init_top_lines(h);\n    return 0;\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}']