CN109889877A - Car multi-screen display control method and device - Google Patents
Car multi-screen display control method and device Download PDFInfo
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Abstract
The present invention relates to automobile technical fields.The present invention proposes a kind of car multi-screen display control method and device, wherein the car multi-screen display control method includes: to obtain multihead display instruction, and receive video resource from player；It is instructed based on the multihead display, corresponding video texture image is separated from the video resource；The video texture image is shared in control in the multiple display.Video texture image rendering technologies are applied as a result, are realized to synchronize on multiple displays and are showed identical or different content.
Description
Technical field
The present invention relates to automobile technical fields, more particularly to a kind of car multi-screen display control method and device.
Background technique
In information-based today, requirement of the automobile market to vehicle-mounted central control system is higher and higher.It navigates from initial vehicle device
Function will support mobile phone to interconnect till now, speech recognition, the high-touch features such as gesture identification.
For car, not only to meet the needs of driver user, while also to consider the demand of passenger inside the vehicle；Than
Such as, WIFI hot spot is provided and audio-visual entertainment watches function etc..Due to the limitation of automobile center console space size, driver region
Can not the great display of installation dimension, driver region dispose large scale, there are the security risks of driving.Then, it is desirable that vehicle
Central control system is carried while retaining display screen LCD of connection itself, moreover it is possible to external big display lcd is supported, for passenger's use.
In addition, display screen LCD playing video file itself should be forbidden when vehicle in use is in driving, and realize extraneous big display
LCD playing video file.
Therefore, it is a kind of can be realized display screen LCD itself on externally connected with display screen LCD synchronize show it is identical or different
The vehicle-mounted middle control technology of content is current industry problem urgently to be resolved.
Summary of the invention
The purpose of the embodiment of the present invention is that a kind of car multi-screen display control method and device are provided, at least to solve mesh
It is preceding cannot achieve in the related technology display screen LCD itself on externally connected with display screen LCD synchronize show different contents the problem of.
To achieve the goals above, on the one hand the embodiment of the present invention provides car multi-screen display control method, in car
On be provided with multiple displays, wherein the car multi-screen display control method includes: to obtain multihead display instruction, and from broadcasting
Device receives video resource；It is instructed based on the multihead display, corresponding video texture image is separated from the video resource；
The video texture image is shared in control in the multiple display.
Further, described to be instructed based on the multihead display, corresponding video line is separated from the video resource
Managing image includes: to obtain decoding frame data corresponding to the video resource based on Surface video container；It is based on
The decoding frame data render is OpenGL external video texture image by SurfaceTexture, wherein the OpenGL video
External texture image can directly be shown by GLSurfaceView.
Further, it is described based on SurfaceTexture by the decoding frame data render be OpenGL external video line
Reason image includes: multiple frame data segments to be intercepted from the decoding frame data, and be arranged only for each frame data segment
One corresponding texture title；The frame data segment is called based on the texture title；And it is incited somebody to action based on SurfaceTexture
The frame data segment called is rendered into corresponding video texture image segments.
Further, it includes: described in parsing that the video texture image is shared in the control in the multiple display
The indicated Driving Scene of multihead display instruction, wherein the Driving Scene includes any one in following: reversing monitoring field
Scape, media play scene, driving navigation scene or human-computer interaction scene；According to the Driving Scene parsed, determine multiple aobvious
Show in device and carries out the different aobvious or multi-screen of multi-screen with aobvious for the video texture image.
Further, described according to the Driving Scene parsed, it determines and is directed to the video texture in multiple displays
It includes: to work as parsed Driving Scene for reversing monitoring scene, driving navigation field that image, which carries out the different aobvious or multi-screen of multi-screen with showing,
When any one in scape and human-computer interaction scene, determines and carried out in the multiple display for the video texture image
Multi-screen is different aobvious；When the Driving Scene parsed is media play scene, determines and be directed to the view in the multiple display
Frequency texture image carries out multi-screen with aobvious.
On the other hand the embodiment of the present invention provides a kind of car multihead display control device, be provided on car multiple aobvious
Show device, wherein the car multihead display control device includes: acquiring unit, for obtaining multihead display instruction, and from broadcasting
Device receives video resource；Video texture stripping unit is removed from the video resource for being instructed based on the multihead display
Corresponding video texture image out；Shared cell shares the video texture image for controlling in the multiple display.
Further, the video texture stripping unit includes: video container module, for being held based on Surface video
Device obtains decoding frame data corresponding to the video resource；Texture rendering module, for being based on SurfaceTexture for institute
Stating decoding frame data render is OpenGL external video texture image, wherein the OpenGL video external texture image can be straight
It connects by GLSurfaceView and shows.
Further, the texture rendering module is also used to intercept multiple frame data segments from the decoding frame data,
And unique corresponding texture title is set for each frame data segment, the frame data piece is called based on the texture title
Section, and, the frame data segment called is rendered by corresponding video texture image segments based on SurfaceTexture.
Further, the shared cell includes: Driving Scene parsing module, for parsing multihead display instruction institute
The Driving Scene of instruction, wherein the Driving Scene includes any one in following: reversing monitoring scene, media play field
Scape, driving navigation scene or human-computer interaction scene；Display module is selected, for determining more according to the Driving Scene parsed
The different aobvious or multi-screen of multi-screen is carried out with aobvious for the video texture image in a display.
Further, described that display module is selected to be also used to work as parsed Driving Scene as reversing monitoring scene, driving
When any one in navigation scenarios and human-computer interaction scene, determines and be directed to the video texture figure in the multiple display
It is different aobvious as carrying out multi-screen, and, when the Driving Scene parsed is media play scene, determine in the multiple display
Multi-screen is carried out with aobvious for the video texture image.
Through the above technical solutions, being able to respond multihead display instruction and shelling video texture image from video resource
From, and video texture image is shared in multiple displays.Video texture rendering technique is applied as a result, is realized multiple aobvious
Show device (including display screen LCD itself on externally connected with display screen LCD) can synchronize show identical or different content.
The other feature and advantage of the embodiment of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is to further understand for providing to the embodiment of the present invention, and constitute part of specification, under
The specific embodiment in face is used to explain the present invention embodiment together, but does not constitute the limitation to the embodiment of the present invention.Attached
In figure:
Fig. 1 is the flow chart of the car multi-screen display control method of one embodiment of the invention；
Fig. 2 is the architecture principle of the vehicle-mounted central control system of the car multi-screen display control method based on one embodiment of the invention
Schematic diagram；
Fig. 3 is that content (video) in external screen is realized in the car multi-screen display control method of one embodiment of the invention
The process principle figure of the method shown:
Fig. 4 is the principle flow chart of the car multi-screen display control method of one embodiment of the invention；
Fig. 5 is the structural block diagram of the car multihead display control device of one embodiment of the invention.
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the embodiment of the present invention.It should be understood that this
Locate described specific embodiment and be merely to illustrate and explain the present invention embodiment, is not intended to restrict the invention embodiment.
As shown in Figure 1, the car multi-screen display control method of one embodiment of the invention, comprising:
S11, multihead display instruction is obtained, and receives video resource from player.
The execution theme of present invention method can be arbitrary controller or processor, can be and just match originally
Set processor or controller on vehicle, such as onboard system controller；In addition, its can also be after additional to vehicle
Processor or controller, such as processor or controller are exclusively used in, to realize that the car multi-screen of the embodiment of the present invention is aobvious
Show control method, and in embodiment of above all belongs to the scope of protection of the present invention.
It is instructed about multihead display, can be and generated by user's operation user interface, such as pass through user's point
Hit the multihead display control etc. on screen；In addition, it is also possible to what default generated, such as booting automatically generates.About broadcasting
The type and quantity for putting device can be various Vehicular video players and can be the one or more Vehicular videos broadcastings of expression
Device, herein should be without limitation.
S12, it is instructed based on multihead display, corresponding video texture image is separated from video resource.
Wherein it is possible to be to be triggered to execute video texture image lift-off technology by multihead display instruction, to obtain video
Video texture image corresponding to resource.
During present inventor practices the application it is also found that: if using setDisplay by loading images
To surfaceview, sound when player plays, which will receive, to be influenced when surfaceview is re-created and causes Caton.
In view of this, it can also be obtains corresponding video texture image in the following manner: being based on Surface
Video container obtains decoding frame data corresponding to video resource；It is by decoding frame data render based on SurfaceTexture
OpenGL external video texture image, wherein OpenGL video external texture image can be opened up directly by GLSurfaceView
Show.Therefore, in embodiments of the present invention, image not will receive by using the container Surface that setSurface method is arranged
Life cycle environmental impact, to ensure the fluency of video image stream.
Further, it can also be the rendering carried out in the following manner for OpenGL external video texture image
Process: multiple frame data segments are intercepted from decoding frame data, and unique corresponding texture name is set for each frame data segment
Claim；Then, the frame data segment is called based on texture title, and, the frame number that will be called based on SurfaceTexture
Corresponding video texture image segments are rendered into according to segment.In the render process of the embodiment of the present invention, apply
SurfaceTexture allows not to be directly output to an entire visible surfaceView, and can be to frame data segment
It is orderly handled, and goes to take out it again when needing broadcast interface, improve the reliability and efficiency for the treatment of process.
Video texture image is shared in S13, control in multiple displays.
Specifically, on the one hand, can be on multiple displays simultaneous display and correspond to same video resource (such as video display
Media resource) shared video texture image, be achieved in multi-screen synchronous and show；On the other hand, it can be in multiple displays
Display corresponds respectively to the different shared views of different video resource (such as reverse image and film and TV media resource) simultaneously on device
Frequency texture image is achieved in multi-screen asynchronous display.
In consideration of it, also proposed the Driving Scene that can detecte car in embodiments of the present invention, and driving for car
It sails scene and determines corresponding multi-screen with display mode or the different display mode of multi-screen.
Specifically, can be the indicated Driving Scene of parsing multihead display instruction, wherein the Driving Scene includes following
In any one: reversing monitoring scene, media play scene, driving navigation scene or human-computer interaction scene；Then, according to institute
The Driving Scene of parsing determines and carries out the different aobvious or multi-screen of multi-screen with aobvious for video texture image in multiple displays.
| Serial number | Function | LCD(1) | LCD (2) (is supported multiple) |
| 1 | Reversing monitoring | Display | It does not show |
| 2 | Media play | Display | Display |
| 3 | Navigation | Display | It does not show |
| 4 | Human-computer interaction interface | Display | It does not show |
Table 1
As shown in table 1, when the Driving Scene parsed is reversing monitoring scene, driving navigation scene and human-computer interaction scene
In any one (scene corresponding to serial number 1,3 or 4) when, determine in multiple displays for video texture image carry out
Multi-screen is different aobvious；Then, it when the Driving Scene parsed is media play scene (scene corresponding to serial number 2), determines more
Multi-screen is carried out with aobvious for video texture image in a display.Hereby it is achieved that the display effect of a host two separate display,
Driver operates display interface with LCD (1) and uses other systems function, and the use without influencing passenger LCD (2) improves vehicle
User experience.
Such as Fig. 2, it illustrates the vehicle-mounted central control system of the car multi-screen display control method based on the embodiment of the present invention,
It can support double screen (also with multi-screen, but external screen shows that content is identical).
When Android system starts to play video:
1) firstly, the player player image resource being resolved to, which is issued to SurfaceTexture, is converted into OpenGL
External texture.Period wound is stated by SurfaceView after P1ayer.setDisplay when avoiding playing in this way
Build the influence of destruction.Then, backstage plays and is achieved.
2) the OpenGL external texture converted can be used GLSurfaceView and directly display, workflow at this moment
Journey reforms into: video playing sound and surface display removing, so that the GLSurfaceView by respective screen is shared
The texture of drafting is achieved a resource, the purpose of multiple Screen sharings.
In embodiments of the present invention, the video playing mode of traditional MediaPlayer+SurfaceView is improved to
MediaPlayer+GLSurfaceView.It is as follows:
// initialization surface
Surface surface=new Suface (TextureUtil.getInstance ())；
// setting broadcast path
mplayer.setDataSource(path)；
// setting plays container
mplayer.setSurface(surface)；
// setting sound output channels
mplayer.setAudioStreamType(AudioManager.STREAM_MUSIC)；
mplayer.prepareAsync()；
If sound when player plays will receive using setDisplay by loading images to surfaceview
It is influenced when surfaceview is re-created and causes Caton.And the container Surface being arranged using setSurface method will not
By image life cycle environmental impact, therefore it will be changed to setSurface method herein.
Next from the point of view of us video container realization step, it is necessary first to get the object instance of external screen, in fact
Modern code is as follows:
// current external screen instance objects are got by DisplayManager method
MDisplayManager=
(DisplayManager)getSystemService(Context.DISPLAY_SERVICE)；
Displays=mDisplayManager.getDisplays ()；
Wherein mDisplayManager is Android screen management class, and displays is int [] array, displays
[1] another external display screen is just represented.
Then, window example need by screen assist display class Presentation show, we are customized one
VideoRearView is inherited from Presentation, as follows:
After creating VideoRearView, the example displays [1] of other screens that will acquire setting to
In the building method of Presentation, then shown by following code:
Have been completed that external screen is shown to this.Such as Fig. 3, it illustrates realize in external screen content (video) into
The flow chart of the method for row display:
Specifically, a container that can be rendered is needed to place video resource wherein, then assist display class aobvious by screen
Show.This video container is exactly Surface, gets the decoded frame data of video by SurfaceTexture, then by
Surface=new Surface (SurfaceTexture)；Later, it will be solved using Mediaplayer.setSurface method
Code data be sent to Surface, OpenGL external texture is converted by SurfaceTexture at this time, can directly by
GLSurfaceView is shown.
The parameter SurfaceTexture instantiation code being wherein passed in Surface is as follows:
The powerful place of SurfaceTexture is not having to be directly output in a visible surfaceView,
And the camera data being truncated to can be handled, go to take out it again when needing broadcast interface,
It is arranged and is shown to Surface.
The effect of substantial createTextureID is exactly to render texture to come.
Customized GLSurfaceView, partial code are as follows:
It creates VideoGLSurfaceView to inherit in GLSurfaceView, and plays image needing to use
This View is added in layout, is then used
VideoGLSurfaceView.onResume () method makes it start to draw,
At this point, broadcasting can be completed in video image.
Such as Fig. 4, it illustrates the principle process of the car multi-screen display control method of one embodiment of the invention, regard when clicking
When frequency playlist, it can be determined that whether there is other screens；When other screens are not present, can be Mediaplayer
The video resource being resolved to is distributed to GLsurfaceview, shows to carry out single main screen.It, can be with when there are other screens
It is to open other screens in service, and use the mode of presentation that corresponding screen is to be shown in other screens
Image is shown；The Mediaplayer video resource being arranged is taken by GLSurfaceView in presentation
It arrives, and then shows presentation, and realize the effect of multihead display.
Such as Fig. 5, it illustrates the car multihead display control devices 50 of one embodiment of the invention, are provided on car more
A display (not shown), wherein the car multihead display control device 50 includes: acquiring unit 501, for obtaining multi-screen
Idsplay order, and video resource is received from player；Video texture stripping unit 502, for being instructed based on the multihead display,
Corresponding video texture image: shared cell 503 is separated from the video resource, for controlling in the multiple display
In share the video texture image.
In some embodiments, the video texture stripping unit 502 includes: video container module (not shown), is used
In obtaining decoding frame data corresponding to the video resource based on Surface video container；Texture rendering module (not shown),
It is OpenGL external video texture image for being based on SurfaceTexture for the decoding frame data render, wherein described
OpenGL video external texture image can directly be shown by GLSurfaceView.
In some embodiments, the texture rendering module is also used to intercept multiple frame numbers from the decoding frame data
Unique corresponding texture title is set according to segment, and for each frame data segment, based on described in texture title calling
Frame data segment, and, the frame data segment called is rendered by corresponding video texture figure based on SurfaceTexture
Photo section.
In some embodiments, the shared cell 503 includes: Driving Scene parsing module (not shown), for solving
The indicated Driving Scene of the multihead display instruction is analysed, wherein the Driving Scene includes any one in following: reversing
Monitoring scene, media play scene, driving navigation scene or human-computer interaction scene；Display module (not shown) is selected, root is used for
According to the Driving Scene parsed, determines and carry out the different aobvious or multi-screen of multi-screen for the video texture image in multiple displays
With aobvious.
In some embodiments, described that display module is selected to be also used to work as parsed Driving Scene as reversing monitoring field
When any one in scape, driving navigation scene and human-computer interaction scene, determines and be directed to the view in the multiple display
Frequency texture image progress multi-screen is different aobvious, and, when the Driving Scene parsed is media play scene, determine the multiple
Multi-screen is carried out with aobvious for the video texture image in display.
About the more details of car multihead display control device of the embodiment of the present invention, it is referred to car multi-screen above
The description of display control method embodiment, and skill identical or corresponding with car multi-screen display control method embodiment can be obtained
Art effect, therefore just repeat no more herein.
The optional embodiment of the embodiment of the present invention is described in detail in conjunction with attached drawing above, still, the embodiment of the present invention is simultaneously
The detail being not limited in above embodiment can be to of the invention real in the range of the technology design of the embodiment of the present invention
The technical solution for applying example carries out a variety of simple variants, these simple variants belong to the protection scope of the embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the embodiment of the present invention pair
No further explanation will be given for various combinations of possible ways.
It will be appreciated by those skilled in the art that implementing the method for the above embodiments is that can pass through
Program is completed to instruct relevant hardware, which is stored in a storage medium, including some instructions are used so that single
Piece machine, chip or processor (processor) execute all or part of the steps of each embodiment the method for the application.And it is preceding
The storage medium stated includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory
The various media that can store program code such as (RAM, Random Access Memory), magnetic or disk.
In addition, any combination can also be carried out between a variety of different embodiments of the embodiment of the present invention, as long as it is not
The thought of the embodiment of the present invention is violated, equally should be considered as disclosure of that of the embodiment of the present invention.
Claims (10)
1. a kind of car multi-screen display control method, is provided with multiple displays on car, wherein the car multihead display
Control method includes:
Multihead display instruction is obtained, and receives video resource from player；
It is instructed based on the multihead display, corresponding video texture image is separated from the video resource；
The video texture image is shared in control in the multiple display.
2. car multi-screen display control method according to claim 1, wherein it is described to be instructed based on the multihead display,
Corresponding video texture image is separated from the video resource includes:
Decoding frame data corresponding to the video resource are obtained based on Surface video container；
It by the decoding frame data render is OpenGL external video texture image based on SurfaceTexture, wherein described
OpenGL video external texture image can directly be shown by GLSurfaceView.
3. the car multi-screen display control method according to weighing and require 2, wherein the SurfaceTexture that is based on will be described
Decoding frame data render is that OpenGL external video texture image includes:
Multiple frame data segments are intercepted from the decoding frame data, and unique corresponding for each frame data segment setting
Texture title；
The frame data segment is called based on the texture title；And
The frame data segment called is rendered into corresponding video texture image segments based on SurfaceTexture.
4. car multi-screen display control method according to claim 1, wherein the control is in the multiple display
Sharing the video texture image includes:
The indicated Driving Scene of the multihead display instruction is parsed, wherein the Driving Scene includes any one in following
Person: reversing monitoring scene, media play scene, driving navigation scene or human-computer interaction scene；
According to the Driving Scene parsed, determine that carrying out different show of multi-screen for the video texture image in multiple displays goes back
It is multi-screen with aobvious.
5. car multi-screen display control method according to claim 4, wherein it is described according to the Driving Scene parsed,
Determine that carrying out the different aobvious or multi-screen of multi-screen with aobvious for the video texture image in multiple displays includes:
When the Driving Scene parsed is any one in reversing monitoring scene, driving navigation scene and human-computer interaction scene
When, it determines different aobvious for video texture image progress multi-screen in the multiple display；
When the Driving Scene parsed is media play scene, determines and be directed to the video texture in the multiple display
Image carries out multi-screen with aobvious.
6. a kind of car multihead display control device, is provided with multiple displays on car, wherein the car multihead display
Control device includes:
Acquiring unit receives video resource for obtaining multihead display instruction, and from player；
Video texture stripping unit separates corresponding view for instructing based on the multihead display from the video resource
Frequency texture image；
Shared cell shares the video texture image for controlling in the multiple display.
7. car multihead display control device according to claim 6, wherein the video texture stripping unit includes:
Video container module, for obtaining decoding frame data corresponding to the video resource based on Surface video container；
Texture rendering module is OpenGL external video line for being based on SurfaceTexture for the decoding frame data render
Image is managed, wherein the OpenGL video external texture image can directly be shown by GLSurfaceView.
8. the car multihead display control device according to weighing and require 7, wherein the texture rendering module is also used to from described
Multiple frame data segments are intercepted in decoding frame data, and unique corresponding texture title is set for each frame data segment,
The frame data segment is called based on the texture title, and, the frame data piece that will be called based on SurfaceTexture
Section is rendered into corresponding video texture image segments.
9. car multihead display control device according to claim 6, wherein the shared cell includes:
Driving Scene parsing module, for parsing the indicated Driving Scene of the multihead display instruction, wherein the driver training ground
Scape includes any one in following: reversing monitoring scene, media play scene, driving navigation scene or human-computer interaction scene；
Display module is selected, for determining and being directed to the video texture in multiple displays according to the Driving Scene parsed
Image carries out the different aobvious or multi-screen of multi-screen with aobvious.
10. car multihead display control device according to claim 9, wherein the selection display module is also used to work as
When the Driving Scene parsed is any one in reversing monitoring scene, driving navigation scene and human-computer interaction scene, determine
It is different aobvious for video texture image progress multi-screen in the multiple display, and, when the Driving Scene parsed is
When media play scene, determines and carry out multi-screen with aobvious for the video texture image in the multiple display.
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| CN113961156A (en) * | 2020-07-20 | 2022-01-21 | 北京字节跳动网络技术有限公司 | Multi-screen display method, device and system, electronic equipment and computer medium |
| WO2022222770A1 (en) * | 2021-04-20 | 2022-10-27 | 京东科技控股股份有限公司 | Image data distribution method and apparatus, and multicast server and medium |
| CN115061762A (en) * | 2022-06-07 | 2022-09-16 | 阿波罗智联(北京)科技有限公司 | Page display method and device, electronic equipment and medium |
| CN115499690A (en) * | 2022-09-20 | 2022-12-20 | 北京奇艺世纪科技有限公司 | Video playing method and device, electronic equipment and storage medium |
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Application publication date: 20190614 |