CN103200237A - Method and device for maintaining remote desktop synchronization - Google Patents
Method and device for maintaining remote desktop synchronization Download PDFInfo
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- CN103200237A CN103200237A CN201310075713XA CN201310075713A CN103200237A CN 103200237 A CN103200237 A CN 103200237A CN 201310075713X A CN201310075713X A CN 201310075713XA CN 201310075713 A CN201310075713 A CN 201310075713A CN 103200237 A CN103200237 A CN 103200237A
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Abstract
The invention discloses a method and a device for maintaining remote desktop synchronization. The method includes the following steps: first updating data are obtained; when transmission with a client is unavailable and a buffer memory space corresponding to the client is empty, a former image frame is stored in the buffer memory space corresponding to the client; when the transmission with the client is available and the buffer memory space corresponding to the client is not empty, second updating data are generated according to a current image frame and the image frame which is stored in the buffer memory space corresponding to the client; and the second updating data are transmitted to the client, and the buffer memory space corresponding to the client is emptied. According to the method, the second updating data are generated, according to the current image frame of a remote desktop and the image frame which is stored in the buffer memory space corresponding to the client and displayed at last, and transmitted to the client, and therefore the client can be kept synchronous with the desktop of a server.
Description
Technical field
The present invention relates to the communications field, more specifically, relate to a kind of synchronous method and apparatus of remote desktop that keeps.
Background technology
RFB (Remote Frame Buffer, remote image frame buffering) agreement is the simple protocol of a remote access graphic user interface.Because the RFB agreement is operated in the picture frame resilient coating, so it is applicable to all window systems and application program.The plotting mode that the RFB agreement adopts is to be based upon on the following basis: the rectangular pixels data block is plotted on the position by coordinate setting, and namely the RFB agreement can realize the data that change between two picture frames are transmitted.
As shown in Figure 1, the remote terminal (generally comprising display, keyboard and mouse) that the user uses is called the RFB client, causes that the terminal (as window system or application program) that the picture frame buffering changes is called the RFB server end.The RFB agreement is a real thin-client agreement, and what mainly consider during the design of RFB agreement is the demand that as far as possible reduces client.
Yet existing RFB server section adopts single-threaded mechanism, can exert an influence to overall performance when the slow network user inserts.
Summary of the invention
In view of this, the purpose of the embodiment of the invention is to propose a kind of synchronous method and apparatus of remote desktop that keeps, and makes can not exert an influence to overall performance when inserting the slow network user.
In order to achieve the above object, the embodiment of the invention proposes a kind of synchronous method of remote desktop that keeps, and may further comprise the steps:
Obtain first new data more, described first more new data be the current image frame of remote desktop and the difference between the previous image frame;
When and described client between the unavailable and described client corresponding cache of transmission space when being empty, the previous image frame is stored to described client corresponding cache space;
When and described client between the available and described client corresponding cache of transmission space when not being empty, generate second new data more according to the picture frame stored in current image frame and the described client corresponding cache space, with second more new data transmission and empty described client corresponding cache space to described client.
Among this method embodiment, client corresponding cache space is for as new data more and the transmission of client when unavailable, the previous image frame of current image frame is carried out buffer memory, so that the last picture frame that shows of the picture frame of storing in the client corresponding cache space and client is synchronous.But when with transmission time spent of client, according to the picture frame of storing in the current image frame of remote desktop and the client corresponding cache space generate second more new data send to client, make client according to its last picture frame and second that shows more new data obtain the current image frame of remote desktop, thereby make client can keep synchronous with the desktop of server end.
Preferred as technique scheme obtains first more after the new data, and described method also comprises:
When and client between the available and described client corresponding cache of transmission space when being empty, with first more new data transmission to described client.This programme the user transmit available and before up-to-date more new data is not sent to client when omitting more new data, be convenient to the user and obtain the current image frame synchronous with remote desktop fast.
Preferred as technique scheme, obtain first more the step of new data comprise: send the first more request of new data of obtaining; Reception first is new data more.Therefore, can realize obtaining first new data more from acquisition server.
Preferred as technique scheme, described transmission obtain first more the request of new data comprise: send the first more request of new data of obtaining at interval according to Preset Time.Realized obtaining automatically renewal.
Preferred as technique scheme obtains first more after the new data, and described method also comprises: according to described first more new data and in advance the previous image frame of buffer memory obtain current image frame and buffer memory.According to first more new data and previous image frame obtain current image frame, and need not to transmit the entire image frame, saved resource.
The embodiment of the invention also proposes a kind of synchronous device of remote desktop that keeps, and comprising:
Acquisition module is used for obtaining first new data more, described first more new data be the current image frame of remote desktop and the difference between the previous image frame;
First processing module, be used for when and described client between the unavailable and described client corresponding cache of transmission space when being sky, the previous image frame is stored to described client corresponding cache space;
Second processing module, be used for when and described client between the available and described client corresponding cache of transmission space when not being sky, generate second new data more according to the picture frame stored in current image frame and the described client corresponding cache space, with second more new data transmission and empty described client corresponding cache space to described client.
Preferred as technique scheme, described device also comprises:
The 3rd processing module is used for obtaining first more behind the new data, when and client between the available and described client corresponding cache of transmission space when be empty, with the first new data transmission described client extremely more.
Preferred as technique scheme, described the 3rd processing module comprises:
Transmitting element is used for sending the first more request of new data of obtaining;
Receiving element is used for more new data of reception first.
Preferred as technique scheme, described transmitting element is used for sending the first more request of new data of obtaining at interval according to Preset Time.
Preferred as technique scheme, described device also comprises:
Generate the present image frame module, be used for obtaining first more after the new data, according to described first more new data and in advance the previous image frame of buffer memory obtain current image frame and buffer memory.
The further feature of the embodiment of the invention and advantage will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the embodiment of the invention.The purpose of the embodiment of the invention and other advantages can realize and obtain by specifically noted structure in the specification of writing, claims and accompanying drawing.
Below by drawings and Examples, the technical scheme of the embodiment of the invention is described in further detail.
Description of drawings
Accompanying drawing is used to provide the further understanding to the embodiment of the invention, and constitutes the part of specification, does not constitute the restriction to the embodiment of the invention.In the accompanying drawings:
Fig. 1 is to use the remote desktop system of RFB agreement;
Fig. 2 is the synchronous main method flow chart of the maintenance remote desktop in the embodiment of the invention;
Fig. 3 is the synchronous method detailed flow chart of the maintenance remote desktop in the embodiment of the invention;
Fig. 4 is the primary structure schematic diagram of the synchronous device of the maintenance remote desktop in the embodiment of the invention;
Fig. 5 is the concrete structure schematic diagram of the synchronous device of the maintenance remote desktop in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment is described, should be appreciated that preferred embodiment described herein only is used for the description and interpretation embodiment of the invention, and be not used in the restriction embodiment of the invention.
Be illustrated in figure 2 as the synchronous main method flow process of maintenance remote desktop in the embodiment of the invention, may further comprise the steps:
Step S201: obtain first new data more, described first more new data be the current image frame of remote desktop and the difference between the previous image frame.
First more new data be the part that changes between current image frame and the previous image frame, and this part is carried out compressed encoding.
Step S202: when and described client between the unavailable and described client corresponding cache of transmission space when being empty, the previous image frame is stored to described client corresponding cache space;
Step S203: when and described client between the available and described client corresponding cache of transmission space when not being empty, generate second new data more according to the picture frame stored in current image frame and the described client corresponding cache space, with second more new data transmission and empty described client corresponding cache space to described client.
When obtaining first more behind the new data, and when the available and described client corresponding cache of the transmission between described client space is not empty, successfully do not receive more new data before client is described, what store in its corresponding cache space is that image namely is the last received image graph picture frame of client.
Among this method embodiment, client corresponding cache space is for as new data more and the transmission of client when unavailable, the previous image frame of current image frame is carried out buffer memory, so that the last picture frame that shows of the picture frame of storing in the client corresponding cache space and client is synchronous.But when with transmission time spent of client, according to the picture frame of storing in the current image frame of remote desktop and the client corresponding cache space generate second more new data send to client, make client according to its last picture frame and second that shows more new data obtain the current image frame of remote desktop, thereby make client can keep synchronous with the desktop of server end.
Introduce implementation procedure in detail below by exemplary embodiments.
Be illustrated in figure 3 as in the embodiment of the invention and keep the synchronous method of remote desktop, before this method, execution in step in advance: for each client is set up spatial cache and transmission serviceable indicia respectively.
Step S301: send the first more request of new data of obtaining.
In this step, send the first more request of new data of obtaining to the desktop acquisition server.The desktop acquisition server is gathered the current image frame (N picture frame) of desktop, thereby and is that difference between N-1 the picture frame is encoded and obtained first new data more with N picture frame and previous picture frame.
Preferably, can send the first more request of new data of obtaining at interval according to Preset Time.
Step S302: reception first is new data more.
Step S303: according to the first more new data and N the picture frame (being current image frame) that N-1 picture frame obtains and acquisition server is synchronous of buffer memory in advance, and N picture frame of buffer memory.
After this step, the picture frame of buffer memory comprises N picture frame and N-1 picture frame.
Step S304: judge with the transmission of client whether available and judge whether this client corresponding cache space is empty by the transmission serviceable indicia that reads client; When and this client corresponding cache space available with the transmission of client are sky, execution in step S305; When and this client corresponding cache space available with the transmission of client are not sky, execution in step S306; When and this client corresponding cache space unavailable with the transmission of client are sky, execution in step S308; When and this client corresponding cache space unavailable with the transmission of client are not sky, then finish.
Step S305: with first more new data transmission to this client, finish.
More new data and the last picture frame that shows generate the current image frame N synchronous with the desktop acquisition server to client according to first.
Step S306: generate second new data more according to the picture frame M that stores in N picture frame of buffer memory and this client corresponding cache space.
The picture frame M that stores in this client corresponding cache space is and the last picture frame synchronized images frame that shows of client.
Step S307: with second more new data transmission and finish after emptying described client corresponding cache space to this client.
Client according to second more new data and the last picture frame that shows generate the current image frame N synchronous with the desktop acquisition server, namely realized keeping synchronously with remote desktop.
Step S308: finish after N-1 picture frame of buffer memory be stored to this client corresponding cache space.
In this step, the N-1 picture frame is the last picture frame that shows of client, and therefore, what store in the client corresponding cache space is the last picture frame that shows of this client.
In the present embodiment, when for example remote desktop has been updated to the N+5 frame, the desktop acquisition server collect first more new data be difference between N+5 frame and the N+4 frame, and client is because transmission before is unavailable, show at last be the N-1 frame time, can not directly use this first more new data obtain the N+5 frame, therefore, need to calculate the more new data between N+5 frame and the N-1 frame, with this this client of new data transmission more, like this, client just can obtain the N+5 frame and show on the basis of N-1 frame.Therefore, in the present embodiment, need buffer memory and desktop synchronized images frame, and obtain the last picture frame that shows of client.
Correspondingly, the embodiment of the invention also proposes a kind of synchronous device of remote desktop that keeps, and as shown in Figure 4, comprising:
Preferably, as shown in Figure 5, described device also comprises:
The 3rd processing module 404 is used for obtaining first more behind the new data, when and client between the available and described client corresponding cache of transmission space when be empty, with the first new data transmission described client extremely more.
Preferably, the 3rd processing module 402 comprises:
Transmitting element is used for sending the first more request of new data of obtaining;
Receiving element is used for more new data of reception first.
Preferably, transmitting element is used for sending the first more request of new data of obtaining at interval according to Preset Time.
Preferably, as shown in Figure 5, described device also comprises:
Generate present image frame module 405, be used for obtaining first more after the new data, according to described first more new data and in advance the previous image frame of buffer memory obtain current image frame and buffer memory.
Those skilled in the art should understand that the embodiment of the invention can be provided as method, system or computer program.Therefore, the embodiment of the invention can adopt complete hardware to realize, software is realized or in conjunction with the form of the realization of software and hardware aspect fully.And the embodiment of the invention can adopt the form of the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) that wherein include computer usable program code.
The embodiment of the invention is that flow chart and/or the block diagram of reference method, equipment (system) and computer program described.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make and carry out the sequence of operations step producing computer implemented processing at computer or other programmable device, thereby be provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame in the instruction that computer or other programmable device are carried out.
Obviously, those skilled in the art can carry out various changes and modification to the embodiment of the invention and not break away from the spirit and scope of the embodiment of the invention.Like this, if these of the embodiment of the invention are revised and modification belongs within the scope of claim and equivalent technologies thereof, then the embodiment of the invention also is intended to comprise these changes and modification interior.
Claims (10)
1. one kind keeps the synchronous method of remote desktop, it is characterized in that, may further comprise the steps:
Obtain first new data more, described first more new data be the current image frame of remote desktop and the difference between the previous image frame;
When and described client between the unavailable and described client corresponding cache of transmission space when being empty, the previous image frame is stored to described client corresponding cache space;
When and described client between the available and described client corresponding cache of transmission space when not being empty, generate second new data more according to the picture frame stored in current image frame and the described client corresponding cache space, with second more new data transmission and empty described client corresponding cache space to described client.
2. method according to claim 1 is characterized in that, obtains first more after the new data, and described method also comprises:
When and client between the available and described client corresponding cache of transmission space when being empty, with first more new data transmission to described client.
3. method according to claim 1 is characterized in that, obtain first more the step of new data comprise:
The first more request of new data is obtained in transmission;
Reception first is new data more.
4. method according to claim 3 is characterized in that, described transmission obtain first more the request of new data comprise: send the first more request of new data of obtaining at interval according to Preset Time.
5. method according to claim 1 is characterized in that, obtains first more after the new data, and described method also comprises:
According to the described first more new data and previous image frame acquisition current image frame and the buffer memory of buffer memory in advance.
6. one kind keeps the synchronous device of remote desktop, it is characterized in that, comprising:
Acquisition module is used for obtaining first new data more, described first more new data be the current image frame of remote desktop and the difference between the previous image frame;
First processing module, be used for when and described client between the unavailable and described client corresponding cache of transmission space when being sky, the previous image frame is stored to described client corresponding cache space;
Second processing module, be used for when and described client between the available and described client corresponding cache of transmission space when not being sky, generate second new data more according to the picture frame stored in current image frame and the described client corresponding cache space, with second more new data transmission and empty described client corresponding cache space to described client.
7. device according to claim 6 is characterized in that, described device also comprises:
The 3rd processing module is used for obtaining first more behind the new data, when and client between the available and described client corresponding cache of transmission space when be empty, with the first new data transmission described client extremely more.
8. device according to claim 7 is characterized in that, described the 3rd processing module comprises:
Transmitting element is used for sending the first more request of new data of obtaining;
Receiving element is used for more new data of reception first.
9. device according to claim 8 is characterized in that, described transmitting element is used for sending the first more request of new data of obtaining at interval according to Preset Time.
10. device according to claim 6 is characterized in that, described device also comprises:
Generate the present image frame module, be used for obtaining first more after the new data, according to described first more new data and in advance the previous image frame of buffer memory obtain current image frame and buffer memory.
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| CN108310766A (en) * | 2018-02-06 | 2018-07-24 | 网易（杭州）网络有限公司 | Data processing method and device, storage medium, processor and terminal |
| CN108509172A (en) * | 2018-04-13 | 2018-09-07 | 平安普惠企业管理有限公司 | Data transmission method, device, system and the computer storage media of simultaneous display |
| CN117591225A (en) * | 2023-12-05 | 2024-02-23 | 太极计算机股份有限公司 | Optimization method and system for rolling dragging window in cloud desktop |
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| WO2015154592A1 (en) * | 2014-10-15 | 2015-10-15 | 中兴通讯股份有限公司 | Method and device for updating virtual desktop |
| CN108183941A (en) * | 2017-12-20 | 2018-06-19 | 深圳安泰创新科技股份有限公司 | Terminal medical imaging remote synchronization method, apparatus and computer readable storage medium |
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| CN117591225B (en) * | 2023-12-05 | 2024-06-11 | 太极计算机股份有限公司 | Optimization method and system for rolling dragging window in cloud desktop |
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