libavcodec/atrac1.c:211: error: Integer Overflow L2
  ([1, +oo] - 4):unsigned32 by call to `bitstream_read`.

libavcodec/atrac1.c:211:20: Call
209.     /* get word length index (idwl) for each BFU */
210.     for (i = 0; i < su->num_bfus; i++)
211.         idwls[i] = bitstream_read(bc, 4);
                        ^
212. 
213.     /* get scalefactor index (idsf) for each BFU */

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 at1_unpack_dequant(BitstreamContext *bc, AT1SUCtx *su,\n                              float spec[AT1_SU_SAMPLES])\n{\n    int bits_used, band_num, bfu_num, i;\n    uint8_t idwls[AT1_MAX_BFU];\n    uint8_t idsfs[AT1_MAX_BFU];\n    su->num_bfus = bfu_amount_tab1[bitstream_read(bc, 3)];\n    bits_used = su->num_bfus * 10 + 32 +\n                bfu_amount_tab2[bitstream_read(bc, 2)] +\n                (bfu_amount_tab3[bitstream_read(bc, 3)] << 1);\n    for (i = 0; i < su->num_bfus; i++)\n        idwls[i] = bitstream_read(bc, 4);\n    for (i = 0; i < su->num_bfus; i++)\n        idsfs[i] = bitstream_read(bc, 6);\n    for (i = su->num_bfus; i < AT1_MAX_BFU; i++)\n        idwls[i] = idsfs[i] = 0;\n    for (band_num = 0; band_num < AT1_QMF_BANDS; band_num++) {\n        for (bfu_num = bfu_bands_t[band_num]; bfu_num < bfu_bands_t[band_num+1]; bfu_num++) {\n            int pos;\n            int num_specs = specs_per_bfu[bfu_num];\n            int word_len  = !!idwls[bfu_num] + idwls[bfu_num];\n            float scale_factor = ff_atrac_sf_table[idsfs[bfu_num]];\n            bits_used += word_len * num_specs;\n            if (bits_used > AT1_SU_MAX_BITS)\n                return AVERROR_INVALIDDATA;\n            pos = su->log2_block_count[band_num] ? bfu_start_short[bfu_num] : bfu_start_long[bfu_num];\n            if (word_len) {\n                float   max_quant = 1.0 / (float)((1 << (word_len - 1)) - 1);\n                for (i = 0; i < num_specs; i++) {\n                    spec[pos+i] = bitstream_read_signed(bc, word_len) * scale_factor * max_quant;\n                }\n            } else {\n                memset(&spec[pos], 0, num_specs * sizeof(float));\n            }\n        }\n    }\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}']