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 mov_write_ac3_tag(AVIOContext *pb, MOVTrack *track)\n{\n    BitstreamContext bc;\n    PutBitContext pbc;\n    uint8_t buf[3];\n    int fscod, bsid, bsmod, acmod, lfeon, frmsizecod;\n    if (track->vos_len < 7)\n        return -1;\n    avio_wb32(pb, 11);\n    ffio_wfourcc(pb, "dac3");\n    bitstream_init(&bc, track->vos_data + 4, (track->vos_len - 4) * 8);\n    fscod      = bitstream_read(&bc, 2);\n    frmsizecod = bitstream_read(&bc, 6);\n    bsid       = bitstream_read(&bc, 5);\n    bsmod      = bitstream_read(&bc, 3);\n    acmod      = bitstream_read(&bc, 3);\n    if (acmod == 2) {\n        bitstream_skip(&bc, 2);\n    } else {\n        if ((acmod & 1) && acmod != 1)\n            bitstream_skip(&bc, 2);\n        if (acmod & 4)\n            bitstream_skip(&bc, 2);\n    }\n    lfeon = bitstream_read_bit(&bc);\n    init_put_bits(&pbc, buf, sizeof(buf));\n    put_bits(&pbc, 2, fscod);\n    put_bits(&pbc, 5, bsid);\n    put_bits(&pbc, 3, bsmod);\n    put_bits(&pbc, 3, acmod);\n    put_bits(&pbc, 1, lfeon);\n    put_bits(&pbc, 5, frmsizecod >> 1);\n    put_bits(&pbc, 5, 0);\n    flush_put_bits(&pbc);\n    avio_write(pb, buf, sizeof(buf));\n    return 11;\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}']