CN1630246B - A method for realizing remote desktop data acquisition - Google Patents
A method for realizing remote desktop data acquisition Download PDFInfo
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- CN1630246B CN1630246B CN 200310121263 CN200310121263A CN1630246B CN 1630246 B CN1630246 B CN 1630246B CN 200310121263 CN200310121263 CN 200310121263 CN 200310121263 A CN200310121263 A CN 200310121263A CN 1630246 B CN1630246 B CN 1630246B
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Abstract
This invention discloses a method for obtaining long distance desktop data, which contains presetting network bridge connection driving module in core layer of local equipment for processing and transmitting mirror data, when the local equipment and current desktop change, said method comprises following steps, (a), in core layer the local equipment mirroring screen image data of current desktop and transmitting the mirrored image data to network bridge connection driving module, (b), the network bridge connection driving module receiving step (a) transmitted mirror image data and compressing it then transmitting compressed mirror image data to long distance equipment by socket transmission mode. Said invention can obtain the desktop data of local equipment more faster and make more convenient long distance control to local equipment.
Description
Technical field
The present invention relates to data acquisition technology, be meant especially a kind of under Windows remote desktop obtain the implementation method of data.
Background technology
Under the Windows environment, the local computer desktop is sent to far-end computer, utilize far-end computer to control the technology of local computer simultaneously, be widely used in a lot of occasions, such as: electronic classroom, Web conference or the like.At present, obtain local computer desktop data and deliver to far-end computer and mainly contain two kinds of implementations:
First kind of scheme is, utilize graphics driver interface (GDI) technology or (DirectDraw) technology of directly drawing, regularly intercept the view data of the current whole screen of local computer, and current view data that is truncated to and truncated picture data are last time compared, then the on-screen data that changes is compressed, send on the far-end computer.
Second kind of scheme be, utilizes to hook up function and message, the region of variation of screen in the active perception local computer desktop in the window application interface (API); Then, still utilize the GDI technology or the view data of the application program of directly drawing (DirectDraw API) technique intercepts current screen region of variation, and the former frame view data of current truncated picture data and storage is compared; If the comparative result difference is just carried out lossless compress with current truncated picture data, deliver on the far-end computer, the former frame view data with storage is updated to current truncated picture data simultaneously.
Though above-mentioned two kinds of schemes can dynamically be delivered to far-end with the desktop picture data that change, there is tangible weak point in these two kinds of schemes:
1) two kinds of schemes all adopt the method for screen printing variation to obtain the screen picture data, that is to say, after computer desktop changes, read on-screen data again, exist significantly to lag behind.
2) adopt the method for first kind of scheme screen printing, can not prejudge the region of variation of screen,, wasted a large amount of processor time when screen takes place still need intercept whole screen when part changes.
3) though second kind of scheme by Windows API hook up function and message perception screen change, for some application program,, still can not obtain the region of variation of screen exactly as using the application program of self-defined message.
4) for the method for screen printing view data, in the computer of Pentium four-processor, no matter be to use GDI or DirectDraw, the screen picture data that read 800*600,16 looks need 120 milliseconds at least, even occupy processor resource fully, per second intercepts screen at the most eight times, the quick variation of display screen that can't be smooth.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of remote desktop to obtain the implementation method of data, can make remote equipment quicker, obtain the desktop data of local device glibly.
Further aim of the present invention provides the implementation method that a kind of remote desktop obtains data, makes remote equipment carry out Long-distance Control to local device more easily.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of remote desktop obtains the implementation method of data, be provided with in the core layer of local device in advance and be responsible for network bridging driver module that mirror image data is handled and transmitted, when local device after front desktop changes, this method may further comprise the steps:
A. adopt the mirror image display driver mechanism under the Windows NT framework, local device is worked as the view data of front desktop region of variation in the mirror image driver module real-time mirror image of core layer, and the view data of mirror image is sent to the network bridging driver module;
B. the mirror image data sent of network bridging driver module receiving step a are carried out data compression with the mirror image data of being received, the mirror image data after will compressing by socket Socket transmission means are again issued remote equipment.
Step a specifically comprises:
A1. in internal memory, create the drawing of a graphics driver interface management;
Articulate operating system kernel module invokes device drives interface in the a2.Windows system, obtain in the local device variation when front desktop;
A3. the desktop that obtained among the step a2 is changed being mirrored in the drawing that step a1 created, by the mode of software interrupt, give the network bridging driver module then the data passes behind the mirror image.
Step b specifically comprises:
B1. the interrupt management module of network bridging driver module inside is loaded Interrupt Service Routine, receives the mirror image data by Interrupt Service Routine;
B2. after the network bridging driver module is received the mirror image data, the mirror image data of being received are added in the storage chained list that network bridging driver module inside sets in advance, and the current mirror image data of receiving are compressed; Data after will compressing then send remote equipment to by Socket.
Wherein, among the step b2 current mirror image storage is further comprised behind chained list: judge currently in the storage chained list whether to have a plurality of mirror image data, if exist, then mirror image data all in the chained list are merged, and the mirror image data after will merging compressed; Otherwise, directly the current mirror image data of receiving are compressed.
The network bridging driver module is further comprising when remote equipment sends mirror image data among the step b: receive the control operation incident that remote equipment is sent.So, after the network bridging driver module was received the control operation incident that remote equipment sends, step b further comprised: produce the control corresponding action according to the control operation incident, and drive current control action corresponding port and finish corresponding operation.Here, described control operation incident is mouse, KeyEvent.
In the such scheme, described local device is a computer.Described remote equipment is computer or projecting apparatus or handheld device or the portable terminal with Presentation Function.
Remote desktop provided by the present invention obtains the implementation method of data, utilize the content of mirror image driver module real-time mirror image when front desktop, by TCP/IP mirrored content is issued remote equipment with the bridge driver module then, so can make remote equipment quick, smooth obtain local device desktop data, this method can accurately be obtained the screen change of local device, can not produce the problem that data lag behind again, can not take a large amount of processor time yet.In addition, because the bridge driver module can receive mouse, the KeyEvent of remote equipment input, and produces corresponding mouse, keyboard action by the mouse-keyboard port, so method of the present invention can easily realize the Long-distance Control of remote equipment to local device.
Description of drawings
Fig. 1 forms structural representation for the system that realizes the inventive method;
Fig. 2 forms structure chart for the inside of the mirror image driver module that adopts among the present invention;
Fig. 3 forms structure chart for the inside of the network bridging driver module that adopts among the present invention;
Fig. 4 is the realization flow figure of the inventive method.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Main thought of the present invention is exactly: at first create a network bridging driver module of being responsible for mirror image data is handled and transmitted between local device and remote equipment, at local device after the content of front desktop changes, utilize the content of the mirror image display driver mechanism mirror image local device of core layer under the Windows NT framework when front desktop, by the TCP/IP mode desktop data of current mirror image are sent to remote equipment by the network bridging driver module again, on remote equipment, show in real time.So, just can make remote equipment obtain the data of remote desktop in real time, and keep the synchronous variation of far-end desktop and local device desktop.Windows NT framework described here can be operating system frameworks such as Windows NT 4.0, Windows 2000, Windows XP; Described local device can be various types of computers; Described remote equipment can be computer, handheld device, have the portable terminal of Presentation Function, projector or the like.
In addition, the network bridging driver module of local device can also receive mouse, the KeyEvent of remote equipment input among the present invention, and pass to self mouse-keyboard port drivers, produce corresponding mouse, keyboard action, thereby realize the Long-distance Control of remote equipment local device.More particularly be exactly that for remote subscriber, elder generation copies to the local device desktop and shows on the remote equipment by the mirror image mode; Remote subscriber carries out mouse, keyboard operation at the current desktop that demonstrates of remote equipment then, and the Action Events that is produced is sent back in the network bridging driver module of local device; The network bridging driver module passes to self mouse-keyboard port drivers with the corresponding event of receiving, produces corresponding mouse, keyboard action; The control local device is finished the operation of mouse, keyboard appointment, such as: open certain file of desktop or the like; Because the caused desktop variation of executable operations meeting sends to remote equipment by mirror image mechanism in real time, and on the remote equipment desktop, show, just look like that to be that remote subscriber carries out local operation in its location the same, Long-distance Control that remote equipment carries out local device that Here it is.
Can adopt system's composition structure as shown in Figure 1 to realize above-mentioned thought of the present invention, referring to Fig. 1, the system that the present invention adopts comprises local and far-end two parts, carries out message and data transmission by the TCP/IP mode between this locality and the remote end module.The function of local part all realizes in the core layer of local device, just in operating system nucleus, finish, mainly comprise: mirror image driver module, network bridging driver module, mouse-keyboard port driver block, in addition, also comprise: little port driver block, installed module, the application program and the registration table that are used to provide function and realize interface management.Wherein, the mirror image driver module is an existing mirror image display mechanism under the Windows NT framework, its inner composition structure as shown in Figure 2, be mainly used in mirror image and location, the judgement of move operation and the transmission that comprises the original screen data of cursor data of finishing screen, this module uses the GDI engine to finish the operation of image.
The treatment mechanism that the network bridging driver module increases newly for the present invention, its inner composition structure as shown in Figure 3, inner each part of this network bridging driver module mainly can be finished following logic function: 1. be responsible for the mirror image driver module between communication, receive view data and back up region of variation; 2. will back up the zone with the storage of chain sheet form, this chained list is a critical resource; 3. operations such as the merging of responsible region of variation (or rectangle), ordering; 4. be responsible for the switching of backup buffering, prevent that image from tearing in processing procedure; 5. realize the management of software interrupt service routine, this break in service be used for and the mirror image driver module between communication; 6. realize the compression of data bitmap; 7. realize the transfer of data of Windows core layer web socket (Socket); 8. be responsible for the transmission of cursor data, this cursor data comprises shape and position; 9. be responsible for the transmission that screen display mode changes; 10. be used to receive mouse, the KeyEvent of input, and be redirected to the mouse-keyboard port driver block.The mouse-keyboard port driver block is mainly used in and receives mouse, the KeyEvent that the network bridging driver module is sent, and the call back function of call operation system registry produces corresponding mouse, keyboard action then.
Based on Fig. 1, Fig. 2, the described system configuration of Fig. 3, the data capture method of remote desktop of the present invention may further comprise the steps as shown in Figure 4:
Step 401: when local device after front desktop changes, the mirror image driver module is made as the basis with the display device camera that DDK under the WindowsNT framework provides, finish the mirror image of local device, and the view data that mirror image obtained is sent to the network bridging driver module when front desktop region of variation view data.Among the present invention, the view data of actual mirror picture is the view data of region of variation.Obtaining and sending specifically of the data of screen picture described in this step comprises:
A1. in internal memory, create the drawing of a GDI management;
B1. articulate operating system kernel module (Win32k.sys) invocation facility driving interface (DDI), obtain to work as in the local device variation of front desktop.Wherein, the described DDI that calls comprises: DrvCopyBits, DrvTextOut, DrvBitBlt, DrvStrokepath or the like;
C1. the desktop that obtained among the step b1 is changed being mirrored in the drawing that step a1 created,,, give the network bridging driver module the data passes behind the mirror image such as adopting INT22 then by modes such as software interrupt, readjustments.
Step 402～403: after the network bridging driver module is received the mirror image data that the mirror image driver module sends, through the merging of the backup of on-screen data, region of variation and be combined the back mirror image data and carry out lossless data compression, by the Socket transmission means mirror image data that compresses is sent to remote equipment again, so, remote equipment can obtain the data of remote desktop.The implementation procedure that this step is concrete further comprises:
A2. (Interrupt Mgr) the load software Interrupt Service Routine of the interrupt management module in the network bridging driver module (ISR);
B2. after Interrupt Service Routine obtains screen picture data that the mirror image driver module sends, the view data of in chained list, adding the region of variation of the mirror image of being received by memory management module (Mem Mgr) and chained list administration module (List Mgr);
C2. scheduling thread (Schedule Thread) is judged the view data that whether stores a plurality of region of variation in the chained list, if have, then the region of variation in the chained list is merged, view data after will merging is then given image processing module (Image OP) and is compressed, merging described here is meant removes superposed part between two or more region of variation, because if screen changes fast, the situation of two or more mirror image region of variation may appear sending continuously; If have only current image date in the chained list, then directly give image processing module (Image OP) and compress the current mirror image data of receiving;
D2. the view data after the compression is sent to far-end by core layer Socket (K-Socket), in transmission course, can adjust the size and the transmission speed of packet according to the network present flow rate automatically.
Data of the present invention are obtained and be can further include: local network bridge joint driver module obtains the control operation incident from far-end, such as: the mouse-keyboard incident.Detailed process is such:
1) at first in step 402, the network bridging driver module also receives the control operation incident of sending from far-end such as mouse, KeyEvent when remote equipment sends mirror image data, such as: the operation that utilizes mouse or keyboard that desktop is carried out.Here, the network bridging driver module receives the control operation incident such as mouse, KeyEvent that far-end is sent by the core layer Socket (K-Socket) of self inside.
2) be example with mouse, KeyEvent, after the network bridging driver module is received mouse, KeyEvent, it be redirected to the mouse-keyboard port driver block.
3) after the mouse-keyboard port driver block is received mouse, KeyEvent, produce corresponding mouse, keyboard action, and the mouse, the keyboard action that are produced are delivered to mouse, keyboard type driver module, drive mouse or keyboard port and finish corresponding operation.Concrete steps comprise: the mouse-keyboard port driver block is earlier to operating system registration mouse, keyboard port, self need obtain the method that how to produce corresponding mouse or keyboard action the notifying operation system, can return corresponding call back function to the mouse-keyboard port driver block after operating system is received; After receiving mouse, KeyEvent, the mouse-keyboard port driver block can be called the call back function that obtains from operating system and produce corresponding mouse, keyboard action.
Embodiment one: the remote projection of wired or wireless networked projection machine.
The inventive method can effectively be applied in the wired or wireless networked projection machine, and in the present embodiment, local device is exactly the equipment that needs projection, and remote equipment is exactly a remote projector.Specific practice is exactly: by network remote projector is coupled together with needing projector equipment, in the need projector equipment, be provided with local part shown in Figure 1, the network process module that has receiving remote desktop data and send the local terminal control operation to the need projector equipment is set in remote projector.Described network process module receive on the one hand need projector equipment that send over, real-time mirror image, when the screen content of front desktop, and received content in time shown; On the other hand, network process module receives the infrared remote control input of local terminal, and the infrared remote control input of being received is given and need be gone to carry out by projector equipment by Network Transmission.Here, infrared remote control input can be modeled as mouse, KeyEvent sends to the network bridging driver module by network and handles.
Need mirror image driver module mirror image self in the projector equipment when the on-screen data of front desktop, and with mirror image data after overcompression, send to the network bridging driver module by interrupt mode; The compression mirror image data that the network bridging driver module will be received is transferred to the network process module of remote projector by the Socket mode of TCP/IP, by network process module mirror image data is shown.Simultaneously, the network process module of remote projector receives the infrared remote control input, and the Socket mode that infrared remote control is imported by TCP/IP is transferred to the network bridging driver module that needs in the projector equipment, after the network bridging driver module is received, it is redirected to the mouse-keyboard port driver block, produces operation accordingly.
Embodiment two: use in remote monitoring/control system.
The present invention also can effectively be applied in remote monitoring/control system, in order effectively to control remote computer system, must obtain the desktop of remote computer in real time, simultaneously control informations such as remote mouse, keyboard is passed to local computer.In the present embodiment, remote equipment is a remote computer, local device is a local computer, is provided with local part shown in Figure 1 in the local computer, and the monitoring/control end processing module that has receiving remote desktop data and send control operation to local computer is set in remote computer.Process is similar described in the data acquisition of concrete remote desktop and the embodiment one.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (9)
1. a remote desktop obtains the implementation method of data, it is characterized in that, be provided with in the core layer of local device in advance and be responsible for network bridging driver module that mirror image data is handled and transmitted, when local device after front desktop changes, this method may further comprise the steps:
A. adopt the mirror image display driver mechanism under the Windows NT framework, local device is worked as the view data of front desktop region of variation in the mirror image driver module real-time mirror image of core layer, and the view data of mirror image is sent to the network bridging driver module;
B. the mirror image data sent of network bridging driver module receiving step a are carried out data compression with the mirror image data of being received, the mirror image data after will compressing by socket Socket transmission means are again issued remote equipment.
2. method according to claim 1 is characterized in that step a specifically comprises:
A1. in internal memory, create the drawing of a graphics driver interface management;
Articulate operating system kernel module invokes device drives interface in the a2.Windows system, obtain in the local device variation when front desktop;
A3. the desktop that obtained among the step a2 is changed being mirrored in the drawing that step a1 created, by the mode of software interrupt, give the network bridging driver module then the data passes behind the mirror image.
3. method according to claim 1 is characterized in that step b specifically comprises:
B1. the interrupt management module of network bridging driver module inside is loaded Interrupt Service Routine, receives the mirror image data by Interrupt Service Routine;
B2. after the network bridging driver module is received the mirror image data, the mirror image data of being received are added in the storage chained list that network bridging driver module inside sets in advance, and the current mirror image data of receiving are compressed; Data after will compressing then send remote equipment to by Socket.
4. method according to claim 3, it is characterized in that, among the step b2 current mirror image storage is further comprised behind chained list: judge currently in the storage chained list whether to have a plurality of mirror image data, if exist, then mirror image data all in the chained list are merged, and the mirror image data after will merging are compressed; Otherwise, directly the current mirror image data of receiving are compressed.
5. method according to claim 1 is characterized in that, the network bridging driver module is further comprising when remote equipment sends mirror image data among the step b: receive the control operation incident that remote equipment is sent.
6. method according to claim 5, it is characterized in that, after the network bridging driver module is received the control operation incident that remote equipment sends, step b further comprises: produce the control corresponding action according to the control operation incident, and drive current control action corresponding port and finish corresponding operation.
7. according to claim 5 or 6 described methods, it is characterized in that described control operation incident is mouse, KeyEvent.
8. according to each described method of claim 1 to 6, it is characterized in that described local device is a computer.
9. according to each described method of claim 1 to 6, it is characterized in that described remote equipment is computer or projecting apparatus or handheld device or the portable terminal with Presentation Function.
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Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101420610B (en) * | 2007-10-26 | 2010-08-18 | 闪联信息技术工程中心有限公司 | Method for displaying remote desktop content and apparatus thereof |
| CN101431736B (en) * | 2007-11-08 | 2012-03-21 | 康佳集团股份有限公司 | Mobile terminal and its communication method |
| US9071843B2 (en) | 2009-02-26 | 2015-06-30 | Microsoft Technology Licensing, Llc | RDP bitmap hash acceleration using SIMD instructions |
| CN101835043B (en) * | 2010-03-23 | 2013-10-09 | 熔点网讯(北京)科技有限公司 | Adaptive bandwidth desktop sharing method based on block encoding |
| CN101951364A (en) * | 2010-08-25 | 2011-01-19 | 深圳市傲冠软件股份有限公司 | Method and system for realizing security audit function in remote control process |
| CN102164167B (en) * | 2011-02-21 | 2014-10-15 | 北京奇虎科技有限公司 | Method and system for remote-control classified transmission |
| CN102857361A (en) * | 2011-07-02 | 2013-01-02 | 杨源杰 | Light-weight remote computer out-of-band management method |
| CN103150204B (en) | 2011-12-23 | 2016-06-29 | 腾讯科技（深圳）有限公司 | Operating system desktop management method and device |
| WO2013134936A1 (en) * | 2012-03-14 | 2013-09-19 | 华为技术有限公司 | Screen recording method, and screen recording control method and device |
| CN104852985B (en) * | 2012-06-25 | 2019-03-01 | 北京奇虎科技有限公司 | A kind of interface presentation, system and terminal |
| CN103530073A (en) * | 2012-07-05 | 2014-01-22 | 罗侍田 | Computer graphic kernel mirror image display technology |
| CN104253804B (en) * | 2013-06-28 | 2017-12-12 | 广州华多网络科技有限公司 | A kind of method and device for transmitting view data |
| CN104765636B (en) * | 2014-01-02 | 2018-05-04 | 华为技术有限公司 | A kind of synthetic method and device of remote desktop image |
| CN104038560A (en) * | 2014-06-30 | 2014-09-10 | 北京奇虎科技有限公司 | Remote assistance method between mobile terminals, client side, electronic device and system |
| CN105187492B (en) * | 2015-08-06 | 2019-06-11 | 上海斐讯数据通信技术有限公司 | Terminal data sharing method, system and equipment |
| CN113068153B (en) * | 2021-03-15 | 2023-08-25 | 深圳乐播科技有限公司 | Remote control method, device, equipment and storage medium for vehicle-mounted central control |
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