CN109491627A - A kind of mostly application throwing screen method, mostly application throwing screen system and storage medium - Google Patents
A kind of mostly application throwing screen method, mostly application throwing screen system and storage medium Download PDFInfo
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- CN109491627A CN109491627A CN201811158500.2A CN201811158500A CN109491627A CN 109491627 A CN109491627 A CN 109491627A CN 201811158500 A CN201811158500 A CN 201811158500A CN 109491627 A CN109491627 A CN 109491627A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000004590 computer program Methods 0.000 claims description 5
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- 230000006835 compression Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
- 230000002452 interceptive effect Effects 0.000 description 5
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1454—Digital output to display device ; Cooperation and interconnection of the display device with other functional units involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/451—Execution arrangements for user interfaces
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T9/00—Image coding
- G06T9/001—Model-based coding, e.g. wire frame
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Abstract
The invention discloses a kind of mostly applications to throw screen method, comprising the following steps: acquisition step: the application interface at collecting computer；Coding step: Video coding is carried out to collected application interface to obtain throwing screen data；It throws screen step: screen data will be thrown and be sent at corresponding display screen.The present invention also provides a kind of computer readable storage medium and screen system is thrown in mostly application.Mostly application of the invention throws screen method by the acquisition to desktop application, carries out throwing screen operation after then carrying out Video coding to collected desktop application, realizes that screen is thrown in more convenient and more efficient application；Greatly improve the throwing screen experience of user.
Description
Technical field
The present invention relates to a kind of field of computer technology, more particularly to screen method is thrown in a kind of mostly application, screen system is thrown in mostly application
System and storage medium.
Background technique
Currently, most of is all desktop acquisition in existing acquisition software, can't be related to specifically acquiring,
And its also not no ability of remote interaction.It is projector than more typical mode, is also known as projector, this is that one kind can incite somebody to action
Image or video project the equipment on curtain, and projector image-forming principle is all similar, no matter the projector of which seed type,
It is all light to be divided into three kinds of colors of RGB, then generate the image of various colors.3 chromatic graph pictures are synthesized one by prism
Image, then projected on screen by camera lens.
Summary of the invention
For overcome the deficiencies in the prior art, one of the objects of the present invention is to provide a kind of mostly applications to throw screen method,
It can solve direct acquisition applications and carry out the technical issues of throwing screen.
The second object of the present invention is to provide a kind of mostly application throwing screen method, can solve direct acquisition applications and thrown
The technical issues of screen.
The third object of the present invention is to provide a kind of computer readable storage medium, can solve direct acquisition applications into
Row throws the technical issues of screen.
An object of the present invention adopts the following technical scheme that realization:
A kind of mostly application throwing screen method, comprising the following steps:
Acquisition step: the application interface at collecting computer；
Coding step: Video coding is carried out to collected application interface to obtain throwing screen data；
It throws screen step: screen data will be thrown and be sent at corresponding display screen.
Further, the acquisition step specifically includes following sub-step:
Obtaining step: the window handle of application program at computer is obtained；
Screenshot step: interface screenshot is carried out to the corresponding window of window handle；
Memory read step: the memory address of interface screenshot is read；
Image reading step: image is read out with preset format from memory address.
Further, in the screenshot step, interface screenshot is carried out to the corresponding window of window handle by system API；
In the memory read step, the memory address of interface screenshot is read by system API；And the default lattice in image reading step
Formula is rgb format.
Further, the coding step specifically includes following sub-step:
Image acquisition step: the image of rgb format is obtained；
Image conversion step: the image of rgb format is converted to the image of yuv420 format；
Video coding step: the image of yuv420 format is encoded to obtain throwing screen data.
Further, in image conversion step: being converted to the image of rgb format using the sws tool of ffmpeg
The image of yuv420 format；In Video coding step: Ffmpeg being used to encode to obtain the image of yuv420 format
Screen data are thrown, and the coded format used in Video coding is H264.
Further, in throwing screen step: screen data will be thrown and be sent at corresponding display screen using UDP mode.
The second object of the present invention adopts the following technical scheme that realization:
A kind of mostly application throwing screen system, including control server, decoder module, screen, throwing panel module and interchanger；It is described
It throws panel module to be used to obtain the destination address for needing to send at application interface and the control server at computer, and to application
Interface carries out Video coding to obtain throwing screen data, then will throw screen data and is sent at interchanger；The interchanger is used for will
The throwing screen data got are transmitted to decoder module, and the decoder module is for being decoded the throwing screen data received, so
It is shipped on corresponding screen afterwards.
Further, the quantity of the screen is multiple.
The third object of the present invention adopts the following technical scheme that realization:
A kind of computer readable storage medium, is stored thereon with computer program, and the computer program is held by processor
Realize that screen method is thrown in a kind of mostly application as described in any one of one of the object of the invention when row.
Compared with prior art, the beneficial effects of the present invention are:
Mostly application of the invention throws screen method by the acquisition to desktop application, then carries out to collected desktop application
It carries out throwing screen operation after Video coding, realizes that screen is thrown in more convenient and more efficient application；Greatly improve the throwing screen experience of user.
Detailed description of the invention
Fig. 1 is that the flow chart of screen method is thrown in the mostly application of embodiment one；
Fig. 2 is that the structural block diagram of screen system is thrown in the mostly application of embodiment two.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
Embodiment one
Inside a meeting, client wants 6 ppt to throw into Mosaic screen, if you are real using the mode that desktop acquires
It is existing, you just can only each ppt open a computer and carry out desktop acquisition.So just inconvenient user；And if when using
When using acquisition, you open 6 ppt just by a computer, also user-friendly in this way；By acquiring different applications
The acquisition of information can be completed.Here multiple applications also refer to different applications, also also refer to similarly apply.
As shown in Figure 1, present embodiments providing a kind of mostly application throwing screen method, comprising the following steps:
S1: the application interface at collecting computer；The step S1 specifically includes the following steps:
S11: the window handle of application program at computer is obtained；
S12: interface screenshot is carried out to the corresponding window of window handle by system API；
S13: the memory address of interface screenshot is read by system API；API(Application Programming
Interface, application programming interface) it is some functions predetermined, it is therefore an objective to application program and developer are provided
It is able to the ability of one group of routine of access based on certain software or hardware, and is not necessarily to access source code, or understand internal work mechanism
Details.
S14: image is read out with preset format from memory address.And the preset format in image reading step is
Rgb format, since rgb format is more common, so using such format be more convenient for total system operation, but in addition to
Rgb format can also use the image of other forms.Interface image acquisition is the window handle by obtaining application program, is led to
The screenshot for the application widget that the available system of the handle is saved is crossed, which can be read by interface provided by system
It takes.The data finally read are rgb formats；What each screenshot was truncated to is all a frame image.Main purpose is in step sl
For the corresponding application interface got, the parameter information of corresponding application interface is then obtained.
S2: Video coding is carried out to collected application interface to obtain throwing screen data；The step S2 specifically include with
Lower step:
S21: the image of rgb format is obtained；
S22: the image of rgb format is converted to the image of yuv420 format using the sws tool of ffmpeg；FFmpeg is
It is a set of can be used to record, converted digital audio, video, and the open source computer program of stream can be translated into.Using LGPL
Or GPL licensing.It provides recording, conversion and the total solution for fluidizing audio-video.It contains very advanced
Audio/video encoding and decoding library libavcodec is many in libavcodec in order to guarantee high portable and encoding and decoding quality
From the beginning code is developed.FFmpeg is developed under Linux platform, but it equally can also be in other operating system environments
Compilation run, including Windows, Mac OS X etc..Other than it ffmpeg can be used to be converted, it can also use other can
To carry out the tool of video editing, as long as corresponding format conversion can be completed.
S23: Ffmpeg is used to encode the image of yuv420 format to obtain throwing screen data.It is used in Video coding
Coded format be H264.H.264 maximum advantage is that have very high data compression ratio, in the condition of same picture quality
Under, compression ratio H.264 is the 2 times or more of MPEG-2, is 1.5~2 times of MPEG-4.For example, the size of original document
If it is 88GB, become 3.5GB, compression ratio 25: 1 after compressing using MPEG-2 compression standard, and uses H.264 compression standard
Become 879MB after compression, from 88GB to 879MB, compression ratio H.264 reaches surprising 102: 1.Low bit- rate (Low Bit
Rate it) plays an important role to high compression ratio H.264 and is compared with MPEG-2 with compress techniques such as MPEG-4ASP,
H.264 compress technique will greatly save download time and the data flow charging of user.Especially it is noted that H.264 existing
Also possess the image of high quality smoothness while with high compression ratio, Just because of this, by the video data H.264 compressed,
Required bandwidth is less in network transmission process, also more economically.It is more convenient to be carried and constructed transmission throwing screen system
System.
S3: screen data will be thrown and be sent at corresponding display screen using UDP mode.UDP is not belonging to connecting-type agreement, thus
It is small with resource consumption, the fast advantage of processing speed, so usually audio, video and general data in transmission using UDP compared with
It is more, even if will not have much impact to reception result because they lose one or two of data packet once in a while.And in transmission number
Connection is not established according to source before and terminal, just simply goes to grab the data from application program when it thinks transmission, and to the greatest extent
It may be thrown on network fastly.In transmitting terminal, the speed that UDP transmits data is only that the speed of data is generated by application program
The limitation of degree, the ability of computer and transmission bandwidth；In receiving end, UDP is put each message section in the queue, and application program is every
It is secondary that a message section is read from queue.It in the present embodiment, is directly to launch the throwing screen data grabbed to corresponding aobvious
It is to lose one or two of data packet to influence result nor especially big due to being using acquisition at display screen.
This software application throws the work general steps of screen: 1, acquiring image；2, encoded video；3, be sent to server to
Fixed address；1,2,3 these three steps are executed every time, are just calculated and are completed the primary transmission for throwing screen, constantly execute this 1,2,3 steps
Suddenly, on screen constantly can be thrown into application
This software is can to throw multiple desktop applications simultaneously, and have remote control application, is able to cooperate a variety of throwing screen tools
Software.Purpose is more convenient and efficiently carries out throwing screen to application, and practicability is more stronger than desktop acquisition, according to previous desktop
Acquisition is the content of computer desktop, if user to watch ppt simultaneously and the content of word compares, then being adopted using desktop
Centralized procurement will somewhat small embarrassment, and use mostly application throw screen, can more easily compare, and answered by this software realization
With long-range control, such as ppt page turning, it is subsequent can be by adding newer command, to the more diverse control of application execution.
The technological achievement of the present embodiment, as follows:
1) the multiple desktop applications of screen can be thrown simultaneously, and current limit is can also to throw 6 applications of screen simultaneously, but as long as calculating
Machine performance can be still can throw many, the benefit that screen is thrown in multiple applications is to throw the multiple applications of screen, with general desktop
Acquisition is compared, and needs some software to require to switch when throwing screen, software is placed into desktop top.And it applies and throws screen just
This problem can be solved.
2) part of functions interacted with desktop software can be currently had been realized in the software interactive on desktop, such as
Ppt or more page turning etc., behind can pass through configuration order.Realize the more multi-functional interaction of desktop software.
Embodiment two
As shown in Fig. 2, the present embodiment provides a kind of mostly applications to throw screen system, including control server, decoder module, screen
Curtain throws panel module and interchanger；The throwing panel module is used to obtain at application interface and the control server at computer and need
The destination address to be sent, and Video coding is carried out to application interface to obtain throwing screen data, it then will throw screen data and be sent to
At interchanger；Here computer can be window computer, he is collected object the most main.It can also be other
The computer etc. of system.Control server is mainly used for controlling the server of whole system scheduling.
The throwing screen data that the interchanger is used to will acquire are transmitted to decoder module, and the decoder module is used for reception
To throwing screen data be decoded, be then shipped on corresponding screen, then so that screen to they launch in
Appearance is shown.Here the quantity of screen be it is multiple, different applications can be shown at different screens.
Above-mentioned all parts interaction figure 2 it can be seen that, using throw shield acquisition computer on application interface and coding, then to
Control server obtains the destination address for needing to send, and then data are sent to decoder box through interchanger, and decoder box receives number
According to rear, data are decoded, are then shipped on screen.
Wherein throwing panel module is that screen software is thrown in the mostly application referred to, and the structure of the software includes that application interface throws panel module,
Information exchange module, controller module composition, wherein application interface throws panel module, contains application interface and acquires, Video coding,
It sends data and flows to the functions such as server.Information exchange module is the module interacted with server, for receiving order, and is divided
It is dealt into each module, is finally that controller module is adjustment and management application interface throws panel module and information exchange module and right
It clicks and responds in interface.
Information interacting method: information exchange refers to that this software is interacted with server, contains information on services and receives biography
It is delivered to the function that each module and each module send instruction to server, which is mainly realized by information exchange module
The implementation method of module reception message:
Each module receives call back function to information exchange module registration message, and call back function can be registered to the team of interactive module
In column, after interactive module receives message, call back function queue will be traversed, and the incoming readjustment letter traversed every time of message
In number, just stop traversing until there is a call back function to handle this message.
The method that module sends messages to server:
There are the argument pointer of an inside, which will be assigned each module when module initialization
It is directed toward interactive module；It when module wants to send messages to server, such as obtains and sends address etc., the disclosure of interactive module can be called
The interface of transmission.
Embodiment three
Embodiment three discloses a kind of computer readable storage medium, and the storage medium is for storing program, and the journey
When sequence is executed by processor, realize that screen method is thrown in the mostly application of embodiment one.
Certainly, a kind of storage medium comprising computer executable instructions, computer provided by the embodiment of the present invention
The method operation that executable instruction is not limited to the described above, can also be performed in method provided by any embodiment of the invention
Relevant operation.
By the description above with respect to embodiment, it is apparent to those skilled in the art that, the present invention
It can be realized by software and required common hardware, naturally it is also possible to which by hardware realization, but in many cases, the former is more
Good embodiment.Based on this understanding, technical solution of the present invention substantially in other words contributes to the prior art
Part can be embodied in the form of software products, which can store in computer readable storage medium
In, floppy disk, read-only memory (Read-Only Memory, ROM), random access memory (Random such as computer
Access Memory, RAM), flash memory (FLASH), hard disk or CD etc., including some instructions use so that an electronic equipment
(can be personal computer, server or the network equipment etc.) executes method described in each embodiment of the present invention.
It is worth noting that, in the above-mentioned embodiment based on content update notice device, included each unit and mould
Block is only divided according to the functional logic, but is not limited to the above division, and is as long as corresponding functions can be realized
It can；In addition, the specific name of each functional unit is also only for convenience of distinguishing each other, the protection model being not intended to restrict the invention
It encloses.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (9)
1. screen method is thrown in a kind of mostly application, which comprises the following steps:
Acquisition step: the application interface at collecting computer；
Coding step: Video coding is carried out to collected application interface to obtain throwing screen data；
It throws screen step: screen data will be thrown and be sent at corresponding display screen.
2. screen method is thrown in a kind of mostly application as described in claim 1, which is characterized in that the acquisition step specifically includes following
Sub-step:
Obtaining step: the window handle of application program at computer is obtained；
Screenshot step: interface screenshot is carried out to the corresponding window of window handle；
Memory read step: the memory address of interface screenshot is read；
Image reading step: image is read out with preset format from memory address.
3. screen method is thrown in a kind of mostly application as claimed in claim 2, which is characterized in that in the screenshot step, pass through system
API carries out interface screenshot to the corresponding window of window handle；In the memory read step, interface is read by system API and is cut
The memory address of figure；And the preset format in image reading step is rgb format.
4. screen method is thrown in a kind of mostly application as claimed in claim 3, which is characterized in that the coding step specifically includes following
Sub-step:
Image acquisition step: the image of rgb format is obtained；
Image conversion step: the image of rgb format is converted to the image of yuv420 format；
Video coding step: the image of yuv420 format is encoded to obtain throwing screen data.
5. screen method is thrown in a kind of mostly application as claimed in claim 4, which is characterized in that in image conversion step: using
The image of rgb format is converted to the image of yuv420 format by the sws tool of ffmpeg；In Video coding step: using
Ffmpeg the image of yuv420 format is encoded with obtain throw screen data, and the coded format used in Video coding for
H264。
6. screen method is thrown in a kind of mostly application as described in any one of claim 1-5, which is characterized in that shield in the throwing and walk
In rapid: screen data will be thrown and be sent at corresponding display screen using UDP mode.
7. screen system is thrown in a kind of mostly application, which is characterized in that including control server, decoder module, screen, throw panel module and friendship
It changes planes；It is described to throw panel module with being used to obtain the target for needing to send at application interface and the control server at computer
Location, and Video coding is carried out to application interface to obtain throwing screen data, it then will throw screen data and be sent at interchanger；The friendship
The throwing screen data for will acquire of changing planes are transmitted to decoder module, the decoder module be used for the throwing screen data received into
Row decoding, is then shipped on corresponding screen.
8. screen system is thrown in a kind of mostly application as claimed in claim 7, which is characterized in that the quantity of the screen is multiple.
9. a kind of computer readable storage medium, is stored thereon with computer program, it is characterised in that: the computer program quilt
Realize that screen method is thrown in a kind of mostly application as claimed in any one of claims 1 to 6 when processor executes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811158500.2A CN109491627A (en) | 2018-09-30 | 2018-09-30 | A kind of mostly application throwing screen method, mostly application throwing screen system and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811158500.2A CN109491627A (en) | 2018-09-30 | 2018-09-30 | A kind of mostly application throwing screen method, mostly application throwing screen system and storage medium |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111634188A (en) * | 2020-05-29 | 2020-09-08 | 北京百度网讯科技有限公司 | Method and device for projecting screen |
| CN111897504A (en) * | 2020-07-14 | 2020-11-06 | 西安万像电子科技有限公司 | Data display method and device, computer readable storage medium and processor |
| CN112423048A (en) * | 2020-10-28 | 2021-02-26 | 西安万像电子科技有限公司 | Screen projection system |
| CN112764853A (en) * | 2021-01-19 | 2021-05-07 | 深圳乐播科技有限公司 | Screen projection method, equipment and system |
| CN113542859A (en) * | 2021-06-18 | 2021-10-22 | 西安万像电子科技有限公司 | Intelligent screen projection system and method |
| WO2024027718A1 (en) * | 2022-08-05 | 2024-02-08 | 华为技术有限公司 | Multi-window screen mirroring method and system, and electronic device |
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| CN111634188A (en) * | 2020-05-29 | 2020-09-08 | 北京百度网讯科技有限公司 | Method and device for projecting screen |
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| WO2024027718A1 (en) * | 2022-08-05 | 2024-02-08 | 华为技术有限公司 | Multi-window screen mirroring method and system, and electronic device |
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