Function ff_msmpeg4_encode_motion

libavcodec/msmpeg4enc.c:306–330

}

void ff_msmpeg4_encode_motion(MSMPEG4EncContext *const ms,
                                  int mx, int my)
{
    MPVEncContext *const s = &ms->m.s;
    const uint32_t *const mv_vector_table = mv_vector_tables[ms->mv_table_index];
    uint32_t code;

    /* modulo encoding */
    /* WARNING : you cannot reach all the MVs even with the modulo
       encoding. This is a somewhat strange compromise they took !!!  */
    if (mx <= -64)
        mx += 64;
    else if (mx >= 64)
        mx -= 64;
    if (my <= -64)
        my += 64;
    else if (my >= 64)
        my -= 64;

    mx += 32;
    my += 32;

    code = mv_vector_table[(mx << 6) | my];
    put_bits(&s->pb, code & 0xff, code >> 8);
}

void ff_msmpeg4_handle_slices(MPVEncContext *const s)
{