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 mp_read_changes_map(MotionPixelsContext *mp, BitstreamContext *bc,\n                                int count, int bits_len, int read_color)\n{\n    uint16_t *pixels;\n    int offset, w, h, color = 0, x, y, i;\n    while (count--) {\n        offset = bitstream_read(bc, mp->offset_bits_len);\n        w      = bitstream_read(bc, bits_len) + 1;\n        h      = bitstream_read(bc, bits_len) + 1;\n        if (read_color)\n            color = bitstream_read(bc, 15);\n        x = offset % mp->avctx->width;\n        y = offset / mp->avctx->width;\n        if (y >= mp->avctx->height)\n            continue;\n        w = FFMIN(w, mp->avctx->width  - x);\n        h = FFMIN(h, mp->avctx->height - y);\n        pixels = (uint16_t *)&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2];\n        while (h--) {\n            mp->changes_map[offset] = w;\n            if (read_color)\n                for (i = 0; i < w; ++i)\n                    pixels[i] = color;\n            offset += mp->avctx->width;\n            pixels += mp->frame->linesize[0] / 2;\n        }\n    }\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}']