CN111399790B - Picture sharing system and implementation method thereof - Google Patents
Picture sharing system and implementation method thereof Download PDFInfo
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- CN111399790B CN111399790B CN202010132529.4A CN202010132529A CN111399790B CN 111399790 B CN111399790 B CN 111399790B CN 202010132529 A CN202010132529 A CN 202010132529A CN 111399790 B CN111399790 B CN 111399790B
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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
- G06F9/46—Multiprogramming arrangements
- G06F9/54—Interprogram communication
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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
- G06F9/46—Multiprogramming arrangements
- G06F9/54—Interprogram communication
- G06F9/544—Buffers; Shared memory; Pipes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention provides a picture sharing system and an implementation method thereof, wherein the rendering result of the shared picture of a second display unit is directly transmitted to a first display unit in a shared display cache mode, a hardware wire harness is not needed for connecting two display units, the efficiency is high, the cost is low, and the product competitiveness is improved.
Description
Technical Field
The invention relates to the technical field of image processing, in particular to a picture sharing system and an implementation method thereof.
Background
With the update of automobile hard software, the functions of automobile instruments are more and more diversified. The method has the advantages that the picture, information and other contents of the navigation entertainment system are displayed on the instrument, so that the use experience of a user can be optimized, and the method becomes one of the basic requirements of a new generation of multifunctional digital instrument.
In the existing instrument and navigation entertainment system all-in-one machine, an instrument operates on a set of hardware equipment independently, a navigation entertainment system operates on a set of hardware equipment independently, and after rendering a shared picture, the navigation entertainment system transmits a display signal to the instrument for display through an LVDS (Low-Voltage Differential Signaling) signal.
Therefore, the prior art is in need of further improvement.
Disclosure of Invention
The invention provides a picture sharing system and a realization method thereof, aiming at solving the defects in the prior art, realizing picture sharing in a low-cost mode and improving the product competitiveness.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
one aspect of the present invention provides a picture sharing system, including:
the system comprises a sharing request sending module, a memory setting module, a first read-write module, a ready receiving module, a synthesizing module and a first display which are arranged in a first display unit, and a sharing request receiving module, a second read-write module, a ready sending module, a sharing control module, a configuration module, a rendering module, a basic display module, an extended display module, a second display, a shared memory unit and a virtual machine management unit which are arranged in a second display unit;
the first read-write module is connected with the ready receiving module, the shared memory unit and the synthesis module, the synthesis module is also connected with a first display, the shared request sending module is connected with the shared request receiving module, and the memory setting module is connected with the shared memory unit;
the shared request receiving module is connected with the shared control module, the configuration module and the rendering module, the rendering module is further connected with the basic display module and the extended display module, the extended display module is further connected with the configuration module and a second read-write module, the second read-write module is connected with the shared memory unit, the basic display module is further connected with the second display, and the shared control module is further connected with the ready-to-send module;
the sharing request sending module is used for sending a sharing picture request to the second display unit;
the memory setting module is used for setting the shared memory unit as a display cache space;
the first read-write module is used for reading a rendering result from the shared memory unit;
the ready receiving module is used for receiving a shared picture ready message sent by the second display unit;
the composition module is used for compositing a rendering result with the picture of the first display unit;
the first display is used for displaying the picture output by the synthesis module;
the sharing request receiving module is used for receiving a sharing picture request sent by the first display unit;
the second read-write module is used for writing a rendering result into the shared memory unit;
the ready sending module is used for sending a shared picture ready message to the first display unit;
the sharing control module is used for starting or closing a sharing picture;
the configuration module is used for configuring the expansion display module;
the rendering module is used for rendering the picture;
the basic display module is used for displaying a main screen picture of the second display unit;
the extended display module is used for displaying an extended picture outside the second display unit;
the second display is used for displaying the picture output by the basic display module;
the shared memory unit is used for storing rendering results;
the virtual machine management unit is used for providing running environments for a first operating system run by the first display unit and a second operating system run by the second display unit.
Specifically, the first operating system is QNX as HostOS; the second operating system is Android and serves as GuestOS.
Specifically, the sharing request sending module and the sharing request receiving module are communication modules between virtual machines.
Another aspect of the present invention provides a method for implementing a picture sharing system, including:
step 1, a first display unit sends a shared picture request to a second display unit, and a shared memory unit is set as a display cache space, wherein the shared picture request comprises shared picture display area information, and the shared picture display area information comprises: sharing the range, the color digit number and the display buffer space of the picture display area;
step 2, after receiving a shared picture request, the second display unit starts picture sharing, and configures and renders the extended display module of the first display unit according to the shared picture request;
step 3, the second display unit writes the rendering result of the extended display module into the shared memory unit and sends a shared image ready message to the first display unit;
step 4, after receiving the shared image ready message, the first display unit reads the rendering result from the shared memory unit and displays the shared image in a shared display area;
further, after the step 4, the method further comprises:
and 5: and the first display unit requests the second display unit to modify the display content of the shared picture, and the step 1 is returned.
Specifically, the step 2 includes: and rendering the extended display module by a surface flanger in the Android application framework layer through OpenGL ES rendering.
Specifically, the step 4 includes:
step 401, the first display unit opens an Overlay hardware layer;
step 402, the first display unit updates a shared picture to the Overlay hardware layer;
and step 403, the Overlay hardware layer synthesizes and displays a shared picture in a shared display area of the first display unit.
The invention has the beneficial effects that: according to the invention, the rendering result of the shared picture of the second display unit is directly transmitted to the first display unit in a shared display cache mode, a hardware wire harness is not required to connect the two display units, the efficiency is high, the cost is low, and the product competitiveness is improved.
Drawings
FIG. 1 is a schematic diagram of a screen sharing system device according to the present invention.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are used for reference and illustration only and are not used for limiting the scope of the invention.
As shown in fig. 1, another aspect of the present invention provides a picture sharing system, including:
the system comprises a sharing request sending module, a memory setting module, a first read-write module, a ready receiving module, a synthesizing module and a first display which are arranged in a first display unit, and a sharing request receiving module, a second read-write module, a ready sending module, a sharing control module, a configuration module, a rendering module, a basic display module, an extended display module, a second display, a shared memory unit and a virtual machine management unit which are arranged in a second display unit;
the first read-write module is connected with the ready receiving module, the shared memory unit and the synthesis module, the synthesis module is also connected with a first display, the shared request sending module is connected with the shared request receiving module, and the memory setting module is connected with the shared memory unit;
the shared request receiving module is connected with the shared control module, the configuration module and the rendering module, the rendering module is further connected with the basic display module and the extended display module, the extended display module is further connected with the configuration module and a second read-write module, the second read-write module is connected with the shared memory unit, the basic display module is further connected with the second display, and the shared control module is further connected with the ready-to-send module;
the sharing request sending module is used for sending a sharing picture request to the second display unit;
the memory setting module is used for setting the shared memory unit as a display cache space;
the first read-write module is used for reading a rendering result from the shared memory unit;
the ready receiving module is used for receiving a shared picture ready message sent by the second display unit;
the composition module is used for compositing a rendering result with the picture of the first display unit;
the first display is used for displaying the picture output by the synthesis module;
the sharing request receiving module is used for receiving a sharing picture request sent by the first display unit;
the second read-write module is used for writing a rendering result into the shared memory unit;
the ready sending module is used for sending a shared picture ready message to the first display unit;
the sharing control module is used for starting or closing a sharing picture;
the configuration module is used for configuring the expansion display module;
the rendering module is used for rendering the picture;
the basic display module is used for displaying a main screen picture of the second display unit;
the extended display module is used for displaying an extended picture outside the second display unit;
the second display is used for displaying the picture output by the basic display module;
the shared memory unit is used for storing rendering results;
the virtual machine management unit is used for providing running environments for a first operating system run by the first display unit and a second operating system run by the second display unit.
In specific implementation, the first operating system and the second operating system run on the same hardware platform (including a CPU, a GPU, a memory, and other hardware devices) through the virtual machine management unit.
In this embodiment, the first operating system is QNX as HostOS; the second operating system is Android and serves as GuestOS.
The first operating system is started first, the virtual machine management unit is started as a module of the first operating system, and then the second operating system is started through the virtual machine management unit.
The sharing request sending module and the sharing request receiving module are communication modules among the virtual machines.
In this embodiment, the main screen is a second display, and the sub-screen is a display unit other than the second display.
The working process of the picture sharing system of the invention is as follows:
the sharing request sending module initiates a sharing picture request to the second display unit, wherein the sharing picture request comprises sharing picture display area information, and the sharing picture display area information comprises: sharing the range, the color digit number and the display buffer space of the picture display area; the memory setting module sets the shared memory unit as a display cache space.
The sharing control module starts picture sharing and sends the information of the display area of the shared picture to the configuration module and the rendering module, and the configuration module and the rendering module configure and render the extended display module according to the information of the display area of the shared picture.
After the rendering module finishes rendering the extended display module, the second read-write module writes a rendering result into the shared memory unit, and the shared control module informs the ready-sending module to send a shared image ready message to the first display unit.
After the ready receiving module receives the shared image ready message sent by the ready sending module, the first read-write module reads the rendering result from the shared memory unit and sends the rendering result to the synthesis module, and the synthesis module synthesizes and outputs the rendering result and the image of the first display unit and finally displays the rendering result and the image on the first display.
In another embodiment of the present invention, a method for implementing a picture sharing system is further provided, including:
step 1, a first display unit sends a shared picture request to a second display unit, and a shared memory unit is set as a display cache space, wherein the shared picture request comprises shared picture display area information, and the shared picture display area information comprises: the range of the display area of the shared picture, the color digit and the display buffer space.
The shared memory unit is a section of continuous area of a physical memory (such as a RAM), and is set as a shared memory of a first operating system and a second operating system; the second operating system may use the shared memory unit through an address translation function of the virtual machine management unit.
And 2, after receiving a shared picture request, the second display unit starts picture sharing, and configures and renders the extended display module of the first display unit according to the shared picture request.
In this embodiment, the step 2 includes: and rendering the extended display module by a surface flanger in the Android application framework layer through OpenGL ES rendering.
And 3, writing the rendering result of the extended display module into the shared memory unit by the second display unit, and sending a shared picture ready message to the first display unit.
And 4, after receiving the shared image ready message, the first display unit reads the rendering result from the shared memory unit and displays the shared image in a shared display area.
In this embodiment, the step 4 includes:
step 401, the first display unit opens an Overlay hardware layer;
step 402, the first display unit updates a shared picture to the Overlay hardware layer;
and step 403, the Overlay hardware layer synthesizes and displays a shared picture in a shared display area of the first display unit.
In another embodiment of the present invention, further comprising:
and 5: and the first display unit requests the second display unit to modify the display content of the shared picture, and the step 1 is returned.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention.
Claims (7)
1. A picture sharing system, comprising:
the system comprises a sharing request sending module, a memory setting module, a first read-write module, a ready receiving module, a synthesizing module and a first display which are arranged in a first display unit, and a sharing request receiving module, a second read-write module, a ready sending module, a sharing control module, a configuration module, a rendering module, a basic display module, an extended display module, a second display, a shared memory unit and a virtual machine management unit which are arranged in a second display unit;
the first read-write module is connected with the ready receiving module, the shared memory unit and the synthesis module, the synthesis module is also connected with a first display, the shared request sending module is connected with the shared request receiving module, and the memory setting module is connected with the shared memory unit;
the shared request receiving module is connected with the shared control module, the configuration module and the rendering module, the rendering module is further connected with the basic display module and the extended display module, the extended display module is further connected with the configuration module and a second read-write module, the second read-write module is connected with the shared memory unit, the basic display module is further connected with the second display, and the shared control module is further connected with the ready sending module;
the sharing request sending module is used for sending a sharing picture request to the second display unit;
the memory setting module is used for setting the shared memory unit as a display cache space;
the first read-write module is used for reading a rendering result from the shared memory unit;
the ready receiving module is used for receiving a shared picture ready message sent by the second display unit;
the composition module is used for compositing a rendering result with the picture of the first display unit;
the first display is used for displaying the picture output by the synthesis module;
the sharing request receiving module is used for receiving a sharing picture request sent by the first display unit;
the second read-write module is used for writing a rendering result into the shared memory unit;
the ready sending module is used for sending a shared picture ready message to the first display unit;
the sharing control module is used for opening or closing a sharing picture;
the configuration module is used for configuring the expansion display module;
the rendering module is used for rendering the picture;
the basic display module is used for displaying a main screen picture of the second display unit;
the extended display module is used for displaying an extended picture outside the second display unit;
the second display is used for displaying the picture output by the basic display module;
the shared memory unit is used for storing a rendering result;
the virtual machine management unit is used for providing running environments for a first operating system run by the first display unit and a second operating system run by the second display unit.
2. The picture sharing system according to claim 1, wherein the sharing request sending module and the sharing request receiving module are inter-virtual machine communication modules.
3. The picture sharing system according to claim 2, wherein the first operating system is QNX as HostOS; the second operating system is Android and serves as GuestOS.
4. A picture sharing system implementation method based on the picture sharing system of any one of claims 1 to 3, comprising:
step 1, a first display unit sends a shared picture request to a second display unit, and a shared memory unit is set as a display cache space, wherein the shared picture request comprises shared picture display area information, and the shared picture display area information comprises: sharing the range, the color digit number and the display cache space of the picture display area;
step 2, after receiving a shared picture request, the second display unit starts picture sharing, and configures and renders the extended display module of the first display unit according to the shared picture request;
step 3, the second display unit writes the rendering result of the extended display module into the shared memory unit and sends a shared image ready message to the first display unit;
and 4, after receiving the shared image ready message, the first display unit reads the rendering result from the shared memory unit and displays the shared image in a shared display area.
5. The picture sharing system implementation method according to claim 4, further comprising after the step 4:
and 5: and the first display unit requests the second display unit to modify the display content of the shared picture, and the step 1 is returned.
6. The picture sharing system implementation method according to claim 5, wherein the step 2 comprises: and rendering the extended display module by a surface flicker in the Android application framework layer through OpenGL ES rendering.
7. The picture sharing system implementation method according to claim 6, wherein the step 4 comprises:
step 401, the first display unit opens an Overlay hardware layer;
step 402, the first display unit updates a shared picture to the Overlay hardware layer;
and step 403, the Overlay hardware layer synthesizes and displays a shared picture in the shared display area of the first display unit.
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| CN110851823A (en) * | 2019-11-12 | 2020-02-28 | 腾讯科技（深圳）有限公司 | Data access method, device, terminal and storage medium |
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| US20140032735A1 (en) * | 2008-06-17 | 2014-01-30 | Abhinav Kapoor | Adaptive rate of screen capture in screen sharing |
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| CN109525559A (en) * | 2018-10-25 | 2019-03-26 | 深圳市创维群欣安防科技股份有限公司 | A kind of picture sharing method and system |
| CN109725867A (en) * | 2019-01-04 | 2019-05-07 | 中科创达软件股份有限公司 | Virtual screen sharing method, device and electronic equipment |
| CN110851823A (en) * | 2019-11-12 | 2020-02-28 | 腾讯科技（深圳）有限公司 | Data access method, device, terminal and storage medium |
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