CN112579322A - Method and device for sharing camera by multiple applications and computer readable storage medium - Google Patents
Method and device for sharing camera by multiple applications and computer readable storage medium Download PDFInfo
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- CN112579322A CN112579322A CN202011560643.3A CN202011560643A CN112579322A CN 112579322 A CN112579322 A CN 112579322A CN 202011560643 A CN202011560643 A CN 202011560643A CN 112579322 A CN112579322 A CN 112579322A
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- 238000013500 data storage Methods 0.000 claims abstract description 26
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- 238000003384 imaging method Methods 0.000 description 1
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- 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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Abstract
The invention discloses a method, a device and a computer readable medium for sharing a camera by multiple applications, wherein the method comprises the following steps: when an application opens a Camera, a shared application list is created in Camera Service, and then application information of the application calling the Camera is stored in the shared application list; returning the Camera Client instance used for providing the application operation Camera to the application calling the Camera; saving the data storage address of the application into a shared application list; when the camera returns the camera data, the same number of copies of the camera data are copied according to the number of applications calling the camera, then the copied camera data are returned to each data storage address recorded in the shared application list in a copy mode, and each application acquires the camera data from the data storage address associated with the application to realize that multiple applications share the same camera.
Description
Technical Field
The invention relates to the technical field of camera sharing, in particular to a method and a device for sharing a camera by multiple applications and a computer readable storage medium.
Background
At present, electronic devices such as mobile phones and tablet computers only support one application to use a camera, but cannot support multiple applications to use one camera at the same time. When one application uses the camera and the other application needs to use the camera at the moment, the camera can only be switched in a manual switching mode, the operation process is very inconvenient, the camera switching mode does not fundamentally solve the problem that multiple applications cannot share the camera, and in some special use scenes, for example, when live broadcast personnel need to open multiple applications and use the camera at the same time, only one application is opened in each electronic device to independently use one camera by purchasing multiple electronic devices, which is undoubtedly very large in resource waste and increases the device purchase cost of users.
Disclosure of Invention
The invention provides a method and a device for sharing a camera by multiple applications and a computer readable storage medium, aiming at sharing the same camera by multiple applications of one device and reducing the purchase cost of the device.
In order to achieve the purpose, the invention adopts the following technical scheme:
the method for sharing the camera by multiple applications comprises the following specific steps:
1) when an application opens a Camera, a shared application list is created in Camera Service, and then application information of the application calling the Camera is stored in the shared application list;
2) returning a Camera Client instance used for providing the Camera to the application for operating the Camera to the application calling the Camera;
3) saving the data storage address of the application to the shared application list;
4) when the camera returns the camera data, copying the same number of parts of the camera data according to the number of the applications calling the camera, and then returning the copied camera data to each data storage address recorded in the shared application list in parts, wherein each application acquires the camera data from the data storage address associated with the application to realize that multiple applications share the same camera.
As a preferable scheme of the present invention, the step 2) further includes a procedure for determining whether the Camera Client instance exists, where the procedure for determining specifically is:
judging whether the Camera Client instance for providing the application to operate the Camera exists or not,
if yes, returning the existing Camera Client instance to the application calling the Camera;
and if not, creating the Camera Client instance and returning the Camera Client instance to the application calling the Camera.
As a preferable aspect of the present invention, the method for multi-application shared imaging further includes:
5) when the application stops calling the camera, deleting the application information of the application stored in the shared application list;
6) determining whether the shared application list is empty,
if yes, closing the Camera Client instance, and releasing Camera resources;
if not, the camera resource release processing is not carried out.
As a preferable scheme of the present invention, the application information includes any one or more of a package name, a process ID, and a binder object of the application.
As a preferred embodiment of the present invention, the camera returns the camera data to the application through the HAL interface.
The invention also provides a device for sharing the camera by multiple applications, which can realize the method for sharing the camera by the multiple applications, and the device comprises:
the shared application list creating module is used for creating a shared application list in Camera Service when the Camera is opened by the application;
the application information storage module is connected with the shared application list creation module and used for storing the application information of the application calling the camera into the shared application list;
the proxy object existence judging module is used for judging whether a Camera Client instance provided for the application to operate the Camera exists or not and outputting a judging result;
the proxy object acquisition module is connected with the proxy object existence judging module and is used for acquiring the Camera Client instance when judging that the Camera Client instance exists;
the proxy object creating module is connected with the proxy object existence judging module and used for creating the Camera Client instance when the Camera Client instance is judged not to exist;
the proxy object returning module is respectively connected with the proxy object acquisition module and the proxy object creation module and is used for returning the acquired or created Camera Client instance to the application calling the Camera;
the application data storage address storage module is connected with the shared application list creation module and used for storing the application data storage address transmitted by the API interface into the shared application list when the camera is operated by the application through the API interface provided by the camera;
the camera data copying module is used for copying the same number of camera data according to the number of the applications calling the cameras when the cameras return the camera data to the applications;
and the camera data returning module is connected with the camera data copying module and used for returning the copied camera data to each data storage address recorded in the shared application list in a copy mode, and each application acquires the camera data from the data storage address associated with the application to realize that multiple applications share the same camera.
As a preferable aspect of the present invention, the apparatus further includes:
an application information deleting module, configured to delete the application information of the application stored in the shared application list when the application stops calling the camera;
a shared application list empty judging module, configured to judge whether the shared application list is empty, and output a judgment result;
and the Camera resource releasing module is connected with the shared application list whether being empty judging module and used for closing the Camera Client instance to release the Camera resources when judging that the shared application list is empty.
As a preferable scheme of the present invention, the application information includes any one or more of a package name, a process ID, and a binder object of the application.
As a preferred embodiment of the present invention, the camera returns the camera data to the application through the HAL interface.
The invention also provides a computer readable storage medium, which comprises an execution instruction, and when a processor of the electronic equipment executes the execution instruction, the processor executes the method for sharing the camera by multiple applications.
The invention realizes that multiple applications share the same camera, reduces the equipment investment of purchasing multiple electronic equipment in order to meet the requirement of using the camera by multiple applications in the live broadcast industry, and simplifies the live broadcast operation flow.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a flowchart illustrating a method for sharing a camera among multiple applications according to an embodiment of the present invention;
fig. 2 is a schematic internal structural diagram of an apparatus for sharing a camera among multiple applications according to an embodiment of the present invention;
fig. 3 is an implementation schematic diagram of multiple applications sharing the same camera.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and the specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being fixed or detachable or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 and 3, the method for sharing a camera by multiple applications provided in an embodiment of the present invention specifically includes:
step 1) when an application opens a Camera, firstly, a shared application list is created in an Android Framework (Camera Service), and then application information of the application calling the Camera is stored in the shared application list;
step 2) returning a Camera Client instance (Camera Client is a proxy object provided for an application by the Android Framework, and the application can operate the Camera through the Camera Client instance, such as Camera video recording) for providing the Camera to the application for calling the Camera;
specifically, the step 2) further includes a procedure for determining whether the Camera Client instance exists, where the procedure for determining includes:
2.1) judging whether a Camera Client instance for providing the application operation Camera exists or not,
if yes, returning the existing Camera Client instance to the application for calling the Camera;
and if not, creating a Camera Client instance and returning the Camera Client instance to the application for calling the Camera.
Step 3) storing the data storage address of the application into a shared application list; specifically, when the application operates the camera through the API interface provided by the camera, the data storage address (surface information) transmitted by the API interface is stored in the shared application list; the camera data returned to the application by the camera is stored in the data storage address associated with the application;
and 4) when the camera returns the camera data to the application through the HAL interface, copying the same number of camera data (the same number as the application calling the camera) according to the number of the application calling the camera, returning the copied camera data to each data storage address recorded in the shared application list in parts, and acquiring the camera data from the respective associated data storage address by each application to realize that multiple applications share one camera at the same time.
In order to release the camera resource in time when the application no longer needs to call the camera, the method for sharing the camera by multiple applications provided by this embodiment further includes:
step 5), when the application stops calling the camera, deleting the application information of the application stored in the shared application list;
step 6) determining whether the shared application list is empty,
if so, closing the Camera Client instance, and after the Camera Client instance is closed, the application cannot call the Camera, so that Camera resources are released;
if not, the camera resource release processing is not carried out.
In the above technical solution, the application information of the application includes any one or more of a package name, a process ID, and a binder object of the application.
The invention also provides a device for sharing the camera by multiple applications, which can realize the method for sharing the camera by the multiple applications, and the device comprises:
the shared application list creating module is used for creating a shared application list in Camera Service when the Camera is opened by the application;
the application information storage module is connected with the shared application list creation module and is used for storing application information (including but not limited to package names, process IDs and binder objects of the applications) of the applications for calling the camera into the shared application list;
a proxy object existence judging module, configured to judge whether a Camera Client instance (a proxy object provided by the Android Framework to the application and through which the application can operate the Camera) provided for the application operation Camera exists, and output a judgment result;
the proxy object acquisition module is connected with the proxy object existence judging module and used for acquiring the Camera Client instance when judging that the Camera Client instance exists;
the proxy object creating module is connected with the proxy object existence judging module and used for creating a Camera Client instance when judging that the Camera Client instance does not exist;
the proxy object returning module is respectively connected with the proxy object acquisition module and the proxy object creation module and is used for returning the acquired or created Camera Client instance to the application for calling the Camera;
the application data storage address storage module is connected with the shared application list creation module and used for storing the application data storage address transmitted by the API interface into the shared application list when the camera is operated by the API interface provided by the camera;
the camera data copying module is used for copying the same number of camera data according to the number of applications calling the camera when the camera returns the camera data to the applications through the HAL interface;
and the camera data returning module is connected with the camera data copying module and used for returning the copied camera data to each application data storage address recorded in the shared application list in a copy mode through the HAL interface, and each application acquires the camera data from the data storage address associated with the application to realize that multiple applications share the same camera.
In addition, in order to release the camera resource in time when the application no longer needs to call the camera, the apparatus for sharing the camera by multiple applications provided in this embodiment further includes:
the application information deleting module is used for deleting the application information of the application stored in the shared application list when the application stops calling the camera;
the shared application list is empty or not, and the shared application list is used for judging whether the shared application list is empty or not and outputting a judgment result;
and the Camera resource releasing module is connected with the shared application list whether to be the empty judging module or not, and is used for closing the Camera Client example to release the Camera resources when judging that the shared application list is empty.
The invention also provides a computer readable storage medium, which comprises an execution instruction, and when a processor of the electronic equipment executes the execution instruction, the processor executes the method for sharing the camera by multiple applications.
In conclusion, the invention realizes that multiple applications share one camera at the same time, reduces the purchase cost of purchasing multiple electronic devices to meet the requirement of using the camera independently by each application in the live broadcast industry in the past, and simplifies the live broadcast operation flow.
It should be understood that the above-described embodiments are merely preferred embodiments of the invention and the technical principles applied thereto. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, such variations are within the scope of the invention as long as they do not depart from the spirit of the invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.
Claims (10)
1. A method for sharing a camera by multiple applications is characterized by comprising the following specific steps:
1) when an application opens a Camera, a shared application list is created in Camera Service, and then application information of the application calling the Camera is stored in the shared application list;
2) returning a Camera Client instance used for providing the Camera to the application for operating the Camera to the application calling the Camera;
3) saving the data storage address of the application to the shared application list;
4) when the camera returns the camera data, copying the same number of parts of the camera data according to the number of the applications calling the camera, and then returning the copied camera data to each data storage address recorded in the shared application list in parts, wherein each application acquires the camera data from the data storage address associated with the application to realize that multiple applications share the same camera.
2. The method for sharing a Camera by multiple applications according to claim 1, wherein the step 2) includes a procedure for determining whether the Camera Client instance exists, and the procedure specifically includes:
judging whether the Camera Client instance for providing the application to operate the Camera exists or not,
if yes, returning the existing Camera Client instance to the application calling the Camera;
and if not, creating the Camera Client instance and returning the Camera Client instance to the application calling the Camera.
3. The method for sharing a camera among multiple applications according to claim 1, wherein the steps of the method further comprise:
5) when the application stops calling the camera, deleting the application information of the application stored in the shared application list;
6) determining whether the shared application list is empty,
if yes, closing the Camera Client instance, and releasing Camera resources;
if not, the camera resource release processing is not carried out.
4. The method for sharing a camera among multiple applications according to claim 1, wherein the application information comprises any one or more of a package name, a process ID, and a binder object of the application.
5. The method of claim 1, wherein the camera returns the camera data to the application through a HAL interface.
6. An apparatus for sharing a camera by multiple applications, which can implement the method for sharing a camera by multiple applications according to any one of claims 1 to 5, wherein the apparatus comprises:
the shared application list creating module is used for creating a shared application list in Camera Service when the Camera is opened by the application;
the application information storage module is connected with the shared application list creation module and used for storing the application information of the application calling the camera into the shared application list;
the proxy object existence judging module is used for judging whether a Camera Client instance provided for the application to operate the Camera exists or not and outputting a judging result;
the proxy object acquisition module is connected with the proxy object existence judging module and is used for acquiring the Camera Client instance when judging that the Camera Client instance exists;
the proxy object creating module is connected with the proxy object existence judging module and used for creating the Camera Client instance when the Camera Client instance is judged not to exist;
the proxy object returning module is respectively connected with the proxy object acquisition module and the proxy object creation module and is used for returning the acquired or created Camera Client instance to the application calling the Camera;
the application data storage address storage module is connected with the shared application list creation module and used for storing the application data storage address transmitted by the API interface into the shared application list when the camera is operated by the application through the API interface provided by the camera;
the camera data copying module is used for copying the same number of camera data according to the number of the applications calling the cameras when the cameras return the camera data to the applications;
and the camera data returning module is connected with the camera data copying module and used for returning the copied camera data to each data storage address recorded in the shared application list in a copy mode, and each application acquires the camera data from the data storage address associated with the application to realize that multiple applications share the same camera.
7. The apparatus for sharing a camera among multiple applications according to claim 6, further comprising:
an application information deleting module, configured to delete the application information of the application stored in the shared application list when the application stops calling the camera;
a shared application list empty judging module, configured to judge whether the shared application list is empty, and output a judgment result;
and the Camera resource releasing module is connected with the shared application list whether being empty judging module and used for closing the Camera Client instance to release the Camera resources when judging that the shared application list is empty.
8. The camera device for multi-application sharing according to claim 6, wherein the application information includes any one or more of a package name, a process ID, and a binder object of the application.
9. The apparatus of claim 6, wherein the camera returns the camera data to the application through a HAL interface.
10. A computer-readable storage medium comprising executable instructions, wherein when a processor of an electronic device executes the executable instructions, the processor performs the method of sharing a camera among multiple applications according to any one of claims 1 to 5.
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Effective date of registration: 20210414 Address after: 201306 building C, No. 888, Huanhu West 2nd Road, Lingang New District, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Applicant after: Shanghai yuemao Technology Co.,Ltd. Address before: 201499 2nd floor, No.10, Lane 255, Xiaotang Road, Fengxian District, Shanghai Applicant before: Youteng (Shanghai) automation equipment Technology Co.,Ltd. |
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