CN107295243A - The method and mobile terminal of mobile terminal collection image - Google Patents
The method and mobile terminal of mobile terminal collection image Download PDFInfo
- Publication number
- CN107295243A CN107295243A CN201610206485.9A CN201610206485A CN107295243A CN 107295243 A CN107295243 A CN 107295243A CN 201610206485 A CN201610206485 A CN 201610206485A CN 107295243 A CN107295243 A CN 107295243A
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- Prior art keywords
- barcode scanning
- image
- scanning engine
- mobile terminal
- interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
Abstract
The invention discloses a kind of method of mobile terminal collection image and mobile terminal, the mobile terminal includes a barcode scanning engine, and the mobile terminal performs following steps in the hardware abstraction layer of system：Initialize a memory space；Obtain the interface for the hardware abstraction layer for calling the barcode scanning engine；The barcode scanning engine is started by the interface；The barcode scanning engine obtains an image after a control instruction is received；Store in described image to the memory space.The image that barcode scanning engine is obtained can rest on hardware abstraction layer by the present invention, it is to avoid the image obtained continues toward application layer transmission, reduce image and successively transmit the time-consuming of generation；And the interface of the hardware abstraction layer of barcode scanning engine is directly invoked, the constraint encapsulated using V4L2 frameworks by platform can be overcome, barcode scanning image can be quickly obtained, be avoided that and limited by operating platform again.
Description
Technical field
The present invention relates to a kind of method of mobile terminal collection image and mobile terminal.
Background technology
Due to the particularity of sector terminal, it has special demand, it is necessary to specialty to two-dimensional scan decoding
Barcode scanning equipment, i.e. barcode scanning engine.And barcode scanning engine is actually a special camera, contain
Light-supplementing system in addition to camera, to Barebone etc., which dictates that it is adopted when obtaining scan image
Be camera mode go catch image.
But class Android (being a kind of freedom based on Linux and the operating system of open source code)
In system, as shown in figure 1, camera (including camera hardware entities Camera Hardware and take the photograph
As head drives Camera driver) image that catches through HAL (Hardware Abstraction Layer,
Hardware abstraction layer) after, JNI (Java Native Interface, java local interface) interface can only be passed through
Continue toward a kind of java (being object oriented program language for writing cross-platform program) applications
Layer transmission (i.e. Camera applications in Fig. 1), then by system application layer related application the image exhibition
Show to terminal user, if scanning engine is also to catch image in this way, then solved by accordingly
Analysis diagram picture is removed in code storehouse in application layer, therefrom parses barcode scanning result and is used for user, can be caused successively
Transmission figure picture is than relatively time-consuming, it is difficult to meet requirement of the industry to barcode scanning efficiency.
However, can (be by linux in the time-consuming technical problem of solution capture images in the prior art
It is a set of it is free using and Free propagation class Unix operating systems) V4L2 (linux of video 4 in kernel
2 video acquisition frameworks) framework goes to realize the driving of barcode scanning engine, then one be by what V4L2 was provided
IOCTL (standard input and output control) operational order is arranged, directly image is obtained in barcode scanning application.But
It is that such implementation have ignored further encapsulation and processing of the system to V4L2 on own platform,
Still can not fast Acquisition scan image.
The content of the invention
The technical problem to be solved in the present invention is to overcome mobile terminal of the prior art to be obtained in scanning
When taking image, successively transmit data cause that time-consuming, inefficiency, using V4L2 frameworks by platform
There is provided a kind of method of mobile terminal collection image and mobile terminal for the defect of the constraint of encapsulation.
The present invention is to solve above-mentioned technical problem by following technical proposals：
A kind of method that mobile terminal gathers image, the mobile terminal includes a barcode scanning engine, its feature
It is, the mobile terminal performs following steps in the hardware abstraction layer of system：
S1, initialization one memory space；
S2, obtain call the barcode scanning engine hardware abstraction layer interface；
S3, pass through the interface and start the barcode scanning engine；
S4, the barcode scanning engine image is obtained after a control instruction is received；
S5, storage described image to the memory space in.
The hardware abstraction layer of system refers to：Operating platform is provided with mobile terminal, the operating platform is
Corresponding hardware abstraction layer in system framework.This programme performs above-mentioned steps, energy in the hardware abstraction layer of system
The image that barcode scanning engine is obtained rests on hardware abstraction layer, it is to avoid the image obtained continues toward application layer
Transmission, reduces image and successively transmits the time-consuming of generation；And directly invoke the hardware abstraction layer of barcode scanning engine
Interface, the constraint encapsulated using V4L2 frameworks by platform can be overcome, barcode scanning can be quickly obtained
Image, is avoided that and is limited by operating platform again.
It is preferred that step S2For：
The hardware abstraction for calling the barcode scanning engine is obtained by way of loading Camera HAL library
The interface of layer.Camera HAL library are the library files generated after code compilation, and the library file is represented
Camera Camera HAL hardware abstraction layers function library,
It is preferred that step S3With step S4Between also include：
S31, the formation parameter of image is set, the resolution ratio of the formation parameter including described image and described
The data format of image.
It is preferred that step S4Also include before：
Sa, a control interface is set in the hardware abstraction layer of the barcode scanning engine, the control interface is used
In the reception control instruction.
It is preferred that step S5Include afterwards：
S51, described image transmitted to a decoder module, the decoder module is used to decode described image.
It is preferred that the memory space includes the first memory space needed for image queue, step S5For：
The data of storage described image formation flow to first memory space to form an image queue.
It is preferred that the memory space also includes the second memory space of buffer circle, step S5Afterwards
Also include：
S52, single-frame images is gathered from described image queue, and the single-frame images is stored in described
In two memory spaces.
The present invention also provides a kind of mobile terminal, and the mobile terminal includes a barcode scanning engine, and its feature exists
In, the mobile terminal the hardware abstraction layer of system have an initialization module, an interface acquisition module,
One starting module, a control module and a memory module；
The initialization module is used to initialize a memory space；
The interface acquisition module is used for the interface for obtaining the hardware abstraction layer for calling the barcode scanning engine；
The starting module is used to start the barcode scanning engine by the interface；
The control module is used to send a control instruction to obtain an image to the barcode scanning engine；
The memory module is used to store in described image to the memory space.
It is preferred that the interface acquisition module is additionally operable to by way of loading Camera HAL library
Obtain the interface for the hardware abstraction layer for calling the barcode scanning engine.
It is preferred that the mobile terminal also includes one first setup module, first setup module is used for
The formation parameter of image is set after the barcode scanning engine is started, and the formation parameter includes described image
The data format of resolution ratio and described image.
It is preferred that the mobile terminal also includes one second setup module, second setup module is used for
One control interface is set in the hardware abstraction layer of the barcode scanning engine, and the control interface is used to receive institute
State control instruction.
The positive effect of the present invention is：The present invention can rest on the image that barcode scanning engine is obtained firmly
Part level of abstraction, it is to avoid the image obtained continues, toward application layer transmission, to reduce image and successively transmit generation
It is time-consuming；And the interface of the hardware abstraction layer of barcode scanning engine is directly invoked, it can overcome and use V4L2 framves
The constraint that structure is encapsulated by platform, can quickly obtain barcode scanning image, be avoided that again by operating platform
Limitation.
Brief description of the drawings
Fig. 1 is the IMAQ that mobile terminal of the prior art is realized in the framework layer of operating system
Flow chart.
Fig. 2 gathers the method flow diagram of image for the mobile terminal of the embodiment of the present invention 1.
Fig. 3 adopts for the image that the mobile terminal of the embodiment of the present invention 1 is realized in the framework layer of operating system
The flow chart of collection.
Fig. 4 is the structural representation of the mobile terminal of the embodiment of the present invention 2.
Embodiment
The present invention is further illustrated below by the mode of embodiment, but is not therefore limited the present invention to
Among described scope of embodiments.
Embodiment 1
The present embodiment provides a kind of method that mobile terminal gathers image, as Figure 2-3, in Fig. 3
Arrows show data transmission direction, the mobile terminal includes a barcode scanning engine, the barcode scanning engine with it is common
The difference of camera essentially consist in, barcode scanning engine increases for common camera some auxiliary
System, such as aiming, light filling；And barcode scanning engine is using the higher black white image of contrast, in favor of decoding.
And the barcode scanning engine of the present embodiment includes hardware entities (the SCAN Engine in such as Fig. 3 of barcode scanning engine
Hardware) and barcode scanning engine entity driving (the SCAN Engine driver in such as Fig. 3), it is described
Mobile terminal performs following steps in the hardware abstraction layer of system：
Step 101, one memory space of initialization；
Namely newly-built memory space, the memory space include image queue needed for the first memory space and
Second memory space of buffer circle.
Step 102, acquisition call the interface of the hardware abstraction layer of the barcode scanning engine；
Specifically, obtained by way of loading Camera HAL library and call the barcode scanning engine
The interface of hardware abstraction layer.Camera HAL library are the library file generated after code compilation, the storehouse
Representation of file camera Camera HAL hardware abstraction layers function library, if including in the library file
Do software interface (API in such as Fig. 3, Application for starting barcode scanning engine and transmission image
Programming Interface, application programming interface), such as, add the interface of image channel, add
Plus image stream type interface, start the interface etc. of picture catching, those interfaces be for image transmitting,
The operation service such as startup of image-capture and barcode scanning engine.
Wherein, the operating platform of mobile terminal can be high-pass operation platform or other operating platforms, using height
During logical operating platform, the processor of mobile terminal can use the processor msm (Mobile of Qualcomm
Station Modem, mobile base band work station), msm is a series of high pass chip, refers to carry
The mobile processor of baseband chip.Because high-pass operation platform is encapsulated to the V4L2 of camera, because
This is directly being had by oneself on platform to taking the photograph when calling the interface of hardware abstraction layer of barcode scanning engine using high pass
As the encapsulation work that the V4L2 of head is done, so as to obtain the interface.And when using other operating platforms,
Correspondence also has the package interface that the platform is done to the V4L2 of camera, in the hardware abstraction of system
Layer calls the interface.
And the hardware abstraction layer of system and the hardware abstraction layer of barcode scanning engine are in same level so that be
The hardware abstraction layer of system can directly invoke interface of the barcode scanning engine in hardware abstraction layer.
Step 103, pass through the interface and start the barcode scanning engine；
Starting barcode scanning engine includes the money for needed in barcode scanning engine hardware when electricity, the engine work of establishment barcode scanning
Source, such as initialization of barcode scanning engine, the model inspection of barcode scanning engine, the controlled operation for checking barcode scanning engine
Interface etc..
After barcode scanning engine is started, in order that the hardware for obtaining image and barcode scanning engine that barcode scanning engine is obtained is real
The performance parameter matching of body, more reliably to obtain the image of scanning, sets figure after barcode scanning engine is started
The formation parameter of picture, the formation parameter includes the resolution ratio of described image and the data format of described image.
In addition, also setting up a control interface after barcode scanning engine is started, the control interface can be IOCTL
Interface, the control interface is used to receive control instruction, and control instruction is for controlling the hard of barcode scanning engine
The response operation of part entity, the control instruction may include for controlling whether the light compensating lamp of barcode scanning engine is opened
Instruction, for controlling hardware entities to perform instruction etc. of scanning.In barcode scanning, user is in movement
The application layer of terminal, in order that user knows the operation itself performed to mobile terminal, user can be
Application layer visually sends the control instruction (as shown in the Cmd in Fig. 3)；And due to the present embodiment
It is to perform above-mentioned steps in the hardware abstraction layer of system, therefore the control instruction can also take out from the hardware of system
As layer is sent, so as to realize automatically control barcode scanning engine.
Step 104, the barcode scanning engine obtain an image after a control instruction is received；
Barcode scanning engine gets on to catch image when receiving control instruction in hardware, the figure that barcode scanning engine is captured
The interface for the hardware abstraction layer that picture passes through barcode scanning engine is transmitted to the hardware abstraction layer of system, and the present embodiment is just
It is the image in the hardware abstraction layer acquisition scanning of system.Because image is obtained by barcode scanning mode,
Therefore the image obtained is the image queue formed by the image of a frame frame, the image queue can regard as
In one Streaming (data flow), Streaming include a frame two field picture, processing image be from
A two field picture is taken in Streaming, is placed into buffer circle, so that user reads.
In step 105, storage described image to the memory space.
Specifically, the data of storage described image formation flow to first memory space to form image team
Single-frame images in described image queue, when user needs to read the image of scanning, is then stored in by row
In second memory space, so as to complete the collection of image.
Second memory space is buffer circle, is that storage will not be wasted using the advantage of buffer circle
Space, gets after image from Streaming, is just written in buffer circle, untill writing completely,
Now Streaming is not off, and the buffer (buffering) for waiting in buffer circle is after i.e. image is removed,
Just continue to obtain from Streaming to be written to buffer circle, so circulation.And read and write pointer and be used to
It is asynchronous that control writes and read.
Step 106, described image transmitted to a decoder module, the decoder module is used for the figure
As decoding.
For the barcode scanning application software in application layer, the result of barcode scanning can be presented directly to user, will
The image (Image in such as Fig. 3) of storage is transmitted to the decoder module (Decoding in such as Fig. 3
Library), decoder module can be located at the hardware abstraction layer of system, and the decoder module can be to have in the prior art
There is the wrapper of decoding function, image transmitting to decoder module can be obtained to the decoded result of image, from
And be presented decoded result to application layer.
The present embodiment using the encapsulation work done on the operating platform of mobile terminal to the V4L2 of camera,
The package interface is obtained in the hardware abstraction layer of system, and image is being captured from HAL, is avoided well
Image send toward java application layers pass again, and java layers operate that brings to take image reprocessing etc..
It can be said that each step of the present embodiment is equivalent to the scan image that the hardware abstraction layer in system is increased newly
Acquisition interface (the SCAN HAL in such as Fig. 3), the scan image acquisition interface is in user's space user
Interacted between space and kernel spacing kernel space, the reference A in Fig. 3 represents this reality
Apply each step realization, the figure that the image capture interface can obtain barcode scanning engine in sign frame A of example
As collecting, and the decoded result of image is transmitted to the application layer (SCAN in such as Fig. 3 as needed
Using).And such interface is not set in the hardware abstraction layer of the system in the prior art so that it is existing
The image for having the barcode scanning engine in technology to obtain can only be continued by the JNI interfaces shown in Fig. 1 toward java
Application layer is transmitted, so as to produce, image is successively transmitted and image takes caused by application layer decoder.
That is, the present embodiment no longer transmits image toward application layer, and the figure for simply obtaining barcode scanning engine
As resting on hardware abstraction layer, when needing to obtain decoded result, directly the result of decoding is transmitted to should
With layer, it is to avoid image successively transmits the time-consuming of generation.And directly invoke the hardware abstraction layer of barcode scanning engine
Interface, the constraint encapsulated using V4L2 frameworks by platform can be overcome, barcode scanning can be quickly obtained
Image, is avoided that and is limited by operating platform again.
Embodiment 2
The present embodiment provides a kind of mobile terminal, as shown in figure 4, the mobile terminal draws including a barcode scanning
1 is held up, the mobile terminal in the hardware abstraction layer of system there is an initialization module 2, an interface to obtain
Module 3, a starting module 4, a control module 5 and a memory module 6；
The initialization module 2 is used to initialize a memory space；The memory space includes image queue
The first required memory space and the second memory space of buffer circle.
The interface acquisition module 3 is used for the interface for obtaining the hardware abstraction layer for calling the barcode scanning engine；
The starting module 4 is used to start the barcode scanning engine by the interface；
The control module 5 is used to send a control instruction to obtain an image to the barcode scanning engine；
The memory module 6 is used to store in described image to the memory space.
Specifically, the data flow that described image is formed is stored to first memory space to form image
Queue, the single-frame images in described image queue is stored in second memory space.
When needing to obtain the result of decoding, described image is transmitted to a decoder module, the decoding mould
Block is used to decode described image, and the result of decoding is transmitted to application layer.
The interface acquisition module 3 is additionally operable to obtain tune by way of loading Camera HAL library
With the interface of the hardware abstraction layer of the barcode scanning engine.
The mobile terminal also includes one first setup module 7, and first setup module 7 is used to open
The formation parameter that image is set after the barcode scanning engine is moved, the formation parameter includes the resolution of described image
The data format of rate and described image.
The mobile terminal also includes one second setup module 8, and second setup module 8 is used in institute
One control interface is set in the hardware abstraction layer for stating barcode scanning engine, and the control interface is used to receive the control
System instruction.
The image that barcode scanning engine is obtained can rest on hardware abstraction layer by the present embodiment, it is to avoid the figure obtained
As continuing toward application layer transmission, reduce image and successively transmit the time-consuming of generation；And directly invoke barcode scanning and draw
The interface for the hardware abstraction layer held up, can overcome the constraint encapsulated using V4L2 frameworks by platform, both
Barcode scanning image can be quickly obtained, is avoided that and is limited by operating platform again.
Although the foregoing describing the embodiment of the present invention, those skilled in the art should manage
Solution, these are merely illustrative of, and protection scope of the present invention is defined by the appended claims.This
The technical staff in field, can be to these embodiment party on the premise of the principle and essence without departing substantially from the present invention
Formula makes various changes or modifications, but these changes and modification each fall within protection scope of the present invention.
Claims (11)
1. a kind of method that mobile terminal gathers image, the mobile terminal includes a barcode scanning engine, it is characterised in that the mobile terminal performs following steps in the hardware abstraction layer of system：
S1, initialization one memory space；
S2, obtain call the barcode scanning engine hardware abstraction layer interface；
S3, pass through the interface and start the barcode scanning engine；
S4, the barcode scanning engine image is obtained after a control instruction is received；
S5, storage described image to the memory space in.
2. the method as described in claim 1, it is characterised in that step S2For：
The interface for the hardware abstraction layer for calling the barcode scanning engine is obtained by way of loading Camera HAL library.
3. the method as described in claim 1, it is characterised in that step S3With step S4Between also include：
S31, the formation parameter of image, the resolution ratio of the formation parameter including described image and the data format of described image are set.
4. the method as described in claim 1, it is characterised in that step S4Also include before：
Sa, a control interface is set in the hardware abstraction layer of the barcode scanning engine, the control interface is used to receive the control instruction.
5. the method as described in any one in claim 1-4, it is characterised in that step S5Include afterwards：
S51, described image transmitted to a decoder module, the decoder module is used to decode described image.
6. the method as described in any one in claim 1-4, it is characterised in that the memory space includes the first memory space needed for image queue, step S5For：
The data flow that described image is formed stores to first memory space to form an image queue.
7. method as claimed in claim 6, it is characterised in that the memory space also includes the second memory space of buffer circle, step S5Also include afterwards：
S52, single-frame images is gathered from described image queue, and the single-frame images is stored in second memory space.
8. a kind of mobile terminal, the mobile terminal includes a barcode scanning engine, it is characterised in that the mobile terminal has an initialization module, an interface acquisition module, a starting module, a control module and a memory module in the hardware abstraction layer of system；
The initialization module is used to initialize a memory space；
The interface acquisition module is used for the interface for obtaining the hardware abstraction layer for calling the barcode scanning engine；
The starting module is used to start the barcode scanning engine by the interface；
The control module is used to send a control instruction to obtain an image to the barcode scanning engine；
The memory module is used to store in described image to the memory space.
9. mobile terminal as claimed in claim 8, it is characterised in that the interface acquisition module is additionally operable to obtain the interface for the hardware abstraction layer for calling the barcode scanning engine by way of loading Camera HAL library.
10. mobile terminal as claimed in claim 8, it is characterized in that, the mobile terminal also includes one first setup module, first setup module is used for after the barcode scanning engine is started the formation parameter for setting image, and the formation parameter includes the resolution ratio of described image and the data format of described image.
11. mobile terminal as claimed in claim 8, it is characterized in that, the mobile terminal also includes one second setup module, and second setup module is used to set a control interface in the hardware abstraction layer of the barcode scanning engine, and the control interface is used to receive the control instruction.
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| CN201610206485.9A CN107295243A (en) | 2016-04-05 | 2016-04-05 | The method and mobile terminal of mobile terminal collection image |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109377460A (en) * | 2018-10-15 | 2019-02-22 | Oppo广东移动通信有限公司 | A kind of image processing method, image processing apparatus and terminal device |
| CN110287751A (en) * | 2019-05-30 | 2019-09-27 | 江苏智联天地科技有限公司 | A kind of quick decoding system and method based on high-pass platform |
| CN112383713A (en) * | 2020-11-13 | 2021-02-19 | 艾体威尔电子技术(北京)有限公司 | Driving method for automatically loading human face MIPI or human face USB camera |
| CN112672046A (en) * | 2020-12-18 | 2021-04-16 | 闻泰通讯股份有限公司 | Storage method and device for continuous shooting image, electronic equipment and storage medium |
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| CN103916580A (en) * | 2012-12-31 | 2014-07-09 | 上海晨兴希姆通电子科技有限公司 | Mobile terminal of android system, and shooting method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109377460A (en) * | 2018-10-15 | 2019-02-22 | Oppo广东移动通信有限公司 | A kind of image processing method, image processing apparatus and terminal device |
| CN110287751A (en) * | 2019-05-30 | 2019-09-27 | 江苏智联天地科技有限公司 | A kind of quick decoding system and method based on high-pass platform |
| CN112383713A (en) * | 2020-11-13 | 2021-02-19 | 艾体威尔电子技术(北京)有限公司 | Driving method for automatically loading human face MIPI or human face USB camera |
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