CN103093777B - A kind of method and system adopting android system control DVD equipment - Google Patents
A kind of method and system adopting android system control DVD equipment Download PDFInfo
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- CN103093777B CN103093777B CN201210585605.2A CN201210585605A CN103093777B CN 103093777 B CN103093777 B CN 103093777B CN 201210585605 A CN201210585605 A CN 201210585605A CN 103093777 B CN103093777 B CN 103093777B
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Abstract
The present invention is applicable to android system field, provides a kind of method and system adopting android system control DVD equipment.Described method comprises: create DVD hardware abstraction layer at the hardware abstraction layer of android system, carry out abstract package, for upper strata provides operation-interface to the action of control DVD equipment; Derive the operation-interface that DVD hardware abstraction layer provides for upper strata, the upper strata being supplied to DVD hardware abstraction layer is called; DVD service module is created, to call the service that media play-back application that the operation-interface of derivation is android system provides operating dvd apparatus on the upper strata of DVD hardware abstraction layer.Present invention achieves android system directly control DVD equipment, reduce system cost.
Description
Technical field
The invention belongs to android system field, particularly relate to a kind of method and system adopting android system control DVD equipment.
Background technology
Android system is applied more and more extensive in mobile unit, android system does not directly support vehicle-carrying DVD equipment at present, the method that each mobile unit manufacturer adopts at present is the Audio and Video broadcasting being controlled vehicle-carrying DVD by a MCU, DVD function and android system independent operating.There is very large drawback in this method, adds new hardware and increase system cost.
Summary of the invention
The object of the present invention is to provide a kind of method adopting android system control DVD equipment, be intended to solve the Audio and Video broadcasting being controlled vehicle-carrying DVD in prior art by a MCU, add the problem that new hardware increases system cost.
The present invention is achieved in that the embodiment of the present invention provides a kind of method adopting android system control DVD equipment, said method comprising the steps of:
Create DVD hardware abstraction layer at the hardware abstraction layer of android system, abstract package is carried out, for upper strata provides operation-interface to the action of control DVD equipment;
Derive the operation-interface that DVD hardware abstraction layer provides for upper strata, the upper strata being supplied to DVD hardware abstraction layer is called;
DVD service module is created, to call the service that media play-back application that the operation-interface of derivation is android system provides operating dvd apparatus on the upper strata of DVD hardware abstraction layer.
The embodiment of the present invention additionally provides a kind of system adopting android system control DVD equipment, and described system comprises:
DVD hardware abstraction layer creating unit, creates DVD hardware abstraction layer for the hardware abstraction layer in android system, carries out abstract package, for upper strata provides operation-interface to the action of control DVD equipment;
Operation-interface lead-out unit, for deriving the operation-interface that DVD hardware abstraction layer provides for upper strata, the upper strata being supplied to DVD hardware abstraction layer is called;
DVD service module creating unit, for creating DVD service module on the upper strata of DVD hardware abstraction layer, to call the service that media play-back application that the operation-interface of derivation is android system provides operating dvd apparatus.
Compared with prior art, beneficial effect is the embodiment of the present invention: by the HAL layer in android system, adds DVD device abstract code, carries out abstract package, for upper strata provides operation-interface to the action of control DVD equipment; Derive the operation-interface that DVD hardware abstraction layer provides for upper strata, the upper strata being supplied to DVD hardware abstraction layer is called; DVD service module is created, to call the service that media play-back application that the operation-interface of derivation is android system provides operating dvd apparatus on the upper strata of DVD hardware abstraction layer; The media player service module of expansion android system, with the broadcasting of compatible DVD disk medium file, realizes android system and directly controls vehicle-carrying DVD equipment, reduce costs.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the method for the employing android system control DVD equipment that the embodiment of the present invention provides;
Fig. 2 is the structural representation of the system of the employing android system control DVD equipment that the embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In embodiments of the present invention, adopt android system directly control DVD equipment, software view realizes, to the control of DVD equipment, reduce system cost.
Refer to Fig. 1, the realization flow of the method for the employing android system control DVD equipment provided for the embodiment of the present invention, it comprises the following steps:
In step S101, create DVD hardware abstraction layer (DVDHAL module) at the hardware abstraction layer of android system, abstract package is carried out, for upper strata provides operation-interface to the action of control DVD equipment;
In embodiments of the present invention, use C/C++ language compilation DVDHAL module, abstract package is carried out to the action of control DVD equipment, such as to broadcasting, stopping, F.F., retrogressing, the query facility state of control DVD equipment, to deliver from godown and the action such as warehouse entry carries out abstract package, to drive DVD equipment.Under the DVDHAL module of writing is present in android system catalogue/system/lib/hw with the file of * .so dynamic base form, called after libdvd.so.
By DVDHAL module using dvd as device identification, be registered in android system hardware abstraction layer (HAL layer), and broadcasting, stopping, F.F., retrogressing, the query facility state of registration DVD equipment, to deliver from godown and the operation-interface such as warehouse entry, for upper strata provides operation-interface, realize the control to DVD equipment.Particularly, the static structure variable structdvd_dev_info of the DVD facility information of a definition g_dvd_dev by name, wherein:
Wherein, structure structdvd_ops is for representing the handling function of specific DVD equipment.
In step s 102, derive the operation-interface that DVD hardware abstraction layer provides for upper strata, the upper strata being supplied to DVD hardware abstraction layer is called.
In embodiments of the present invention, between DVDHAL module and the upper strata of DVDHAL module, by creating DVDHALJNI interface module, deriving the operation-interface that DVD hardware abstraction layer provides for upper strata, realizing the upper strata of DVDHAL module and the mutual of described DVDHAL module.In the present embodiment, in DVDHALJNI interface module, register the broadcasting of the control DVD equipment that DVDHAL module provides, stopping, F.F., retrogressing, query facility state, deliver from godown and the operation-interface such as warehouse entry, and the operation-interface using dvd to provide to obtain DVDHAL module to the hw_get_module () function calling android system as device identification parameter, realizes the derivation of DVDHAL module interface.And then the operation-interface that the upper strata of DVDHAL module provides for upper strata by the DVD hardware abstraction layer called DVDHALJNI interface module and derive, realizes controlling DVD equipment.
In step s 103, create DVD service module on the upper strata of DVD hardware abstraction layer, to call the service that media play-back application that the operation-interface of derivation is android system provides operating dvd apparatus;
In embodiments of the present invention, a system service based on AndroidJava is created on the upper strata of DVD hardware abstraction layer, i.e. DVD service module, broadcasting, stopping, F.F., retrogressing, the query facility state of the control DVD equipment that the DVD hardware abstraction layer that this DVD service module can call derivation provides for upper strata, delivers from godown and the operation-interface such as warehouse entry.Thus the media play-back application of android system can use DVD service module to obtain service, realizes the control to DVD equipment.
As another preferred embodiment of the present invention, the method for described employing android system control DVD equipment can also comprise step:
Inspection need play the form of media file, if DVD disk medium file, then by DVD service module control DVD device plays; If not DVD disk medium file, then play by the media player service module (MediaPlayer service module) of android system.
Particularly, on the basis of the primary MediaPlayer service module of android system, add a new function, namely check and need the media file play whether to have dvd prefix, if had, utilize DVD service module to obtain DVD service object, call corresponding operation-interface, control DVD equipment realizes the playing function of DVD disk medium file; If no, then perform android system media play operation originally, play by the media player service module of android system.Thus extend the function of the media player service module (MediaPlayer service module) of android system, with the broadcasting of compatible DVD disk medium file.
In sum, the embodiment of the present invention, by the HAL layer in android system, is added DVD device abstract code, is carried out abstract package, for upper strata provides operation-interface to the action of control DVD equipment; Derive the operation-interface that DVD hardware abstraction layer provides for upper strata, the upper strata being supplied to DVD hardware abstraction layer is called; DVD service module is created, to call the service that media play-back application that the operation-interface of derivation is android system provides operating dvd apparatus on the upper strata of DVD hardware abstraction layer; The media player service module of expansion android system, with the broadcasting of compatible DVD disk medium file, realizes android system and directly controls vehicle-carrying DVD equipment, reduce costs.
Corresponding, as shown in Figure 2, the structural representation of the system of the employing android system control DVD equipment provided for the embodiment of the present invention.
The system of described employing android system control DVD equipment comprises:
DVD hardware abstraction layer creating unit 201, creates DVD hardware abstraction layer for the hardware abstraction layer in android system, carries out abstract package, for upper strata provides operation-interface to the action of control DVD equipment.
Operation-interface lead-out unit 202, for deriving the operation-interface that DVD hardware abstraction layer provides for upper strata, the upper strata being supplied to DVD hardware abstraction layer is called.
DVD service module creating unit 203, for creating DVD service module on the upper strata of DVD hardware abstraction layer, to call the service that media play-back application that the operation-interface of derivation is android system provides operating dvd apparatus.
As another preferred embodiment of the present invention, the system of described employing android system control DVD equipment can also comprise:
Media file format inspection unit 204, checks the form need playing media file, if DVD disk medium file, then by DVD service module control DVD device plays; If not DVD disk medium file, then play by the media player service module of android system.
The system of the employing android system control DVD equipment that the embodiment of the present invention provides can be used in the embodiment of the method for aforementioned correspondence, and details, see the description of above-described embodiment one, do not repeat them here.
In sum, the embodiment of the present invention, by the HAL layer of DVD hardware abstraction layer creating unit in android system, is added DVD device abstract code, is carried out abstract package, for upper strata provides operation-interface to the action of control DVD equipment; By the operation-interface that operation-interface lead-out unit derivation DVD hardware abstraction layer provides for upper strata, the upper strata being supplied to DVD hardware abstraction layer is called; DVD service module creating unit creates DVD service module on the upper strata of DVD hardware abstraction layer, to call the service that media play-back application that the operation-interface of derivation is android system provides operating dvd apparatus; By the media player service module of media file format inspection unit expansion android system, with the broadcasting of compatible DVD disk medium file, realize android system and directly control vehicle-carrying DVD equipment, reduce costs.
One of ordinary skill in the art will appreciate that all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program has come, described program can be stored in a computer read/write memory medium, described storage medium, as ROM/RAM, disk, CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. adopt a method for android system control DVD equipment, it is characterized in that, said method comprising the steps of:
A, create DVD hardware abstraction layer at the hardware abstraction layer of android system, abstract package is carried out, for upper strata provides operation-interface to the action of control DVD equipment;
The operation-interface that B, derivation DVD hardware abstraction layer provide for upper strata, the upper strata being supplied to DVD hardware abstraction layer is called;
C, create DVD service module on the upper strata of DVD hardware abstraction layer, to call the service that media play-back application that the operation-interface of derivation is android system provides operating dvd apparatus;
D, check and need play the form of media file, if DVD disk medium file, then by DVD service module control DVD device plays; If not DVD disk medium file, then play by the media player service module of android system; The form that described inspection need play media file is that inspection need be play media file and whether had dvd prefix.
2. the method for claim 1, it is characterized in that, in described steps A, abstract package is carried out to the action of control DVD equipment and be specially broadcasting, stopping, F.F., retrogressing, query facility state to control DVD equipment, deliver from godown and abstract package is carried out in warehouse entry action.
3. the method for claim 1, is characterized in that, described DVD hardware abstraction layer and DVD service module are undertaken by the JNI interface mechanism of android system alternately.
4. the method for claim 1, is characterized in that, the media play-back application of described android system and DVD service module are undertaken by the binder mechanism of android system alternately.
5. adopt a system for android system control DVD equipment, it is characterized in that, described system comprises:
DVD hardware abstraction layer creating unit, creates DVD hardware abstraction layer for the hardware abstraction layer in android system, carries out abstract package, for upper strata provides operation-interface to the action of control DVD equipment;
Operation-interface lead-out unit, for deriving the operation-interface that DVD hardware abstraction layer provides for upper strata, the upper strata being supplied to DVD hardware abstraction layer is called;
DVD service module creating unit, for creating DVD service module on the upper strata of DVD hardware abstraction layer, to call the service that media play-back application that the operation-interface of derivation is android system provides operating dvd apparatus;
Media file format inspection unit, checks the form need playing media file, if DVD disk medium file, then by DVD service module control DVD device plays; If not DVD disk medium file, then play by the media player service module of android system; The form that described inspection need play media file is that inspection need be play media file and whether had dvd prefix.
6. system as claimed in claim 5, is characterized in that, the described action to control DVD equipment is carried out abstract package and is specially broadcasting, stopping, F.F., retrogressing, query facility state to control DVD equipment, delivers from godown and abstract package is carried out in warehouse entry action.
7. system as claimed in claim 5, it is characterized in that, described DVD hardware abstraction layer and DVD service module are undertaken by the JNI interface mechanism of android system alternately.
8. system as claimed in claim 5, it is characterized in that, the media play-back application of described android system and DVD service module are undertaken by the binder mechanism of android system alternately.
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