libavcodec/atrac3plus.c:1811: error: Integer Overflow L2
  ([1, +oo] - 4):unsigned32 by call to `bitstream_read`.

libavcodec/atrac3plus.c:1811:34: Call
1809.     ctx->noise_present = bitstream_read_bit(bc);
1810.     if (ctx->noise_present) {
1811.         ctx->noise_level_index = bitstream_read(bc, 4);
                                       ^
1812.         ctx->noise_table_index = bitstream_read(bc, 4);
1813.     }

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;
}
['int ff_atrac3p_decode_channel_unit(BitstreamContext *bc, Atrac3pChanUnitCtx *ctx,\n                                   int num_channels, AVCodecContext *avctx)\n{\n    int ret;\n    ctx->num_quant_units = bitstream_read(bc, 5) + 1;\n    if (ctx->num_quant_units > 28 && ctx->num_quant_units < 32) {\n        av_log(avctx, AV_LOG_ERROR,\n               "Invalid number of quantization units: %d!\\n",\n               ctx->num_quant_units);\n        return AVERROR_INVALIDDATA;\n    }\n    ctx->mute_flag = bitstream_read_bit(bc);\n    if ((ret = decode_quant_wordlen(bc, ctx, num_channels, avctx)) < 0)\n        return ret;\n    ctx->num_subbands       = atrac3p_qu_to_subband[ctx->num_quant_units - 1] + 1;\n    ctx->num_coded_subbands = ctx->used_quant_units\n                              ? atrac3p_qu_to_subband[ctx->used_quant_units - 1] + 1\n                              : 0;\n    if ((ret = decode_scale_factors(bc, ctx, num_channels, avctx)) < 0)\n        return ret;\n    if ((ret = decode_code_table_indexes(bc, ctx, num_channels, avctx)) < 0)\n        return ret;\n    decode_spectrum(bc, ctx, num_channels, avctx);\n    if (num_channels == 2) {\n        get_subband_flags(bc, ctx->swap_channels, ctx->num_coded_subbands);\n        get_subband_flags(bc, ctx->negate_coeffs, ctx->num_coded_subbands);\n    }\n    decode_window_shape(bc, ctx, num_channels);\n    if ((ret = decode_gainc_data(bc, ctx, num_channels, avctx)) < 0)\n        return ret;\n    if ((ret = decode_tones_info(bc, ctx, num_channels, avctx)) < 0)\n        return ret;\n    ctx->noise_present = bitstream_read_bit(bc);\n    if (ctx->noise_present) {\n        ctx->noise_level_index = bitstream_read(bc, 4);\n        ctx->noise_table_index = bitstream_read(bc, 4);\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}']