CN103513954A - Method and system for realizing support of USB wireless audio equipment - Google Patents
Method and system for realizing support of USB wireless audio equipment Download PDFInfo
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- CN103513954A CN103513954A CN201210280215.4A CN201210280215A CN103513954A CN 103513954 A CN103513954 A CN 103513954A CN 201210280215 A CN201210280215 A CN 201210280215A CN 103513954 A CN103513954 A CN 103513954A
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Abstract
The invention discloses a method and system for realizing support of USB wireless audio equipment. The method comprises the steps that when detecting that the USB wireless audio equipment is inserted, transversing a registered directory of an Android system, and finding out a sound card driver which corresponds to the USB directory and is registered in the Android system; judging whether the sound card driver can be used normally; when the sound card driver can be used normally, shielding the audio equipment of the Android system, turning on the sound card driver, and driving the USB wireless audio equipment to realize the audio function. Through simple improvements, the method and system enable multiple intelligent devices of the Android system to use the USB wireless audio equipment to input and output, meet requirements of users, and bring convenience to utilization by people.
Description
Technical field
The present invention relates to the field of audio play of Android system, relate in particular to a kind of method and system of supporting USB wireless audio devices that realize in Android system.
Background technology
The primary system of Android, from 3.1, has been supported multiple USB device, and such as USB keyboard, USB mouse and USB game paddle, these are improved to user and have brought better user to experience.The Android4.0 version of issuing at present, can support at kernel (Kernel) layer USB audio class (the USB Audio Class of standard, UAC) equipment, simultaneously, follow the development of Radio Transmission Technology, more and more use the USB earphone-microphone of 2.4G wireless technology to appear in people's life.
In routine use, user often need to utilize the smart machine (such as mobile phone, PAD, intelligent television) of Android system listen to music or converse, but do not want to have influence on again other people, or user does not want to be fettered by the transmission range of ventional loudspeakers, can when listening to music or conversing, do other thing.But in existing Android system, when inputing or outputing sound, voice data, after audio decoder, can only be exported or input by microphone by carrying loudspeaker along the passage of acquiescence.It is mainly because voice output or the input process of the hardware abstraction layer of existing Android system are fixed, take voice output process as example, application program (Application, while APP) playing sound file, hardware abstraction layer can call voice data output function (Out_write function), voice data is write to bottom hardware equipment, voice data is written in mpeg audio decoder, final by the driving of Kernel layer (inner nuclear layer), be written to and carry loudspeaker and raise one's voice.Because the processing procedure of above-mentioned voice data is fixed, so, even if manually connecting after USB wireless audio devices, sound still carries by system that loudspeaker is raised one's voice or system carries microphone and carries out radio reception, cannot input or output by USB wireless audio devices.
Prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide and in Android system, realize the method and system of supporting USB wireless audio devices, be intended to solve the problem that existing USB wireless audio devices cannot be used in Android system.
Technical scheme of the present invention is as follows:
In Android system, realize a method of supporting USB wireless audio devices, wherein, comprise step:
A, when needs are realized audio-frequency function, the LOGIN directory of traversal Android system, finds out the driver of sound card corresponding with described USB wireless audio devices of having registered in Android system;
B, judge whether the driver of sound card that described USB wireless audio devices is corresponding can normally use;
C, when described driver of sound card can normally be used, shield Android system and carry audio frequency apparatus, and open described driver of sound card, drive described USB wireless audio devices to realize audio-frequency function.
The described method of supporting USB wireless audio devices that realizes in Android system, wherein, also comprises before described steps A:
A0, when Android system detects the insertion of USB wireless audio devices, in LOGIN directory, register the driver of sound card that this USB wireless audio devices is corresponding.
The described method of supporting USB wireless audio devices that realizes in Android system, wherein, described steps A specifically comprises:
A1, travel through in real time the LOGIN directory of Android system;
A2, in described LOGIN directory, find out driver of sound card catalogue;
A3, in described driver of sound card catalogue, find out driver of sound card corresponding to USB wireless audio devices of having registered with insert in Android system.
The described method of supporting USB wireless audio devices that realizes in Android system, wherein, described step C specifically comprises:
C1, when described driver of sound card can normally be used, for described driver of sound card increases by a mark;
C2, shielding Android system carry audio frequency apparatus;
C3, open the markd driver of sound card of tool, by corresponding USB wireless audio devices, realize audio-frequency function.
The described method of supporting USB wireless audio devices that realizes in Android system, wherein, described step C also comprises:
When described driver of sound card can not normally be used, by Android system, carry audio frequency apparatus and realize audio-frequency function.
In Android system, realize a system of supporting USB wireless audio devices, wherein, comprising:
Driver of sound card is searched module, and for when needs are realized audio-frequency function, the LOGIN directory of traversal Android system, finds out the driver of sound card corresponding with described USB wireless audio devices of having registered in Android system;
Driver of sound card judge module, for judging whether the driver of sound card that described USB wireless audio devices is corresponding can normally use;
Audio frequency apparatus handover module, for when described driver of sound card can normally be used, shields Android system and carries audio frequency apparatus, and open described driver of sound card, drives described USB wireless audio devices to realize audio-frequency function.
The described system of supporting USB wireless audio devices that realizes in Android system, wherein, described driver of sound card is searched module and is comprised:
LOGIN directory traversal unit, for traveling through in real time the LOGIN directory of Android system;
Driver of sound card directory search unit, for finding out driver of sound card catalogue at described LOGIN directory;
Driver of sound card is searched unit, for find out driver of sound card corresponding to the USB wireless audio devices with inserting of having registered in Android system in described driver of sound card catalogue.
The described system of supporting USB wireless audio devices that realizes in Android system, wherein, described audio frequency apparatus handover module comprises:
Indexing unit, for when described driver of sound card can normally be used, for described driver of sound card increases by a mark;
Screen unit, carries audio frequency apparatus for shielding Android system;
Enable unit, for opening the markd driver of sound card of tool, to enable corresponding USB wireless audio devices, realize audio-frequency function.
Beneficial effect: the present invention realizes the method and system of supporting USB wireless audio devices in Android system, in driver of sound card driver of sound card corresponding to the audio frequency apparatus that carries except system in LOGIN directory being detected, can normally open in addition driver of sound card time, confirm to have inserted USB wireless audio devices in this Android system, then audio frequency apparatus system being carried cuts out, and realizes audio-frequency function by USB wireless audio devices.Obviously, the present invention improves by simple, makes the smart machine of numerous Android systems all can utilize USB wireless audio devices to realize audio-frequency function, has met user's demand, has facilitated people's use.
Accompanying drawing explanation
Fig. 1 is the process flow diagram that the present invention realizes the method preferred embodiment of supporting USB wireless audio devices in Android system.
Fig. 2 searches the particular flow sheet of the driver of sound card that described USB wireless audio devices is corresponding in method shown in Fig. 1.
Fig. 3 realizes the process flow diagram of audio-frequency function by USB wireless audio devices in method shown in Fig. 1.
Fig. 4 is the structured flowchart that the present invention realizes the system preferred embodiment of supporting USB wireless audio devices in Android system.
Fig. 5 is the structured flowchart that in system shown in Figure 4, driver of sound card is searched module.
Fig. 6 is the structured flowchart of USB audio frequency apparatus handover module in system shown in Figure 4.
Embodiment
The invention provides in Android system and to realize the method and system of supporting USB wireless audio devices, for making object of the present invention, technical scheme and effect clearer, clear and definite, below the present invention is described in more detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Refer to Fig. 1, Fig. 1 is the process flow diagram that the present invention realizes the method preferred embodiment of supporting USB wireless audio devices in Android system, and as shown in the figure, it comprises step:
S101, when needs are realized audio-frequency function, the LOGIN directory of traversal Android system, finds out driver of sound card corresponding to USB wireless audio devices of registering in Android system;
S102, judge that whether the driver of sound card that described USB wireless audio devices is corresponding can normally use, and if so, performs step S102; If not, carry out S104;
S103, shielding Android system carry audio frequency apparatus, and open described driver of sound card, by the USB wireless audio devices that described driver of sound card is corresponding, realize audio-frequency function;
S104, by Android system, carry audio frequency apparatus and realize audio-frequency function.
In step S101, first in the LOGIN directory of Android system, find registered driver of sound card.While being connected to Android system when the insertion of the USB of similar USB earphone-microphone wireless audio devices, these equipment can be registered in the specific catalogue in Android system, generate the relevant information of this equipment corresponding to Android system.For example, Android system provides proc catalogue, and proc catalogue is a read-only file system, and all equipment of having registered in Android system can find in catalogue corresponding to proc.Take audio output apparatus as example, and the loudspeaker carrying in Android system generates following file: proc/asound/card0 herein under proc/asound/ (using and adopt ALSA to be embodied as example as audio frequency) catalogue.And after we are connected to the equipment of Android system by USB earphone-microphone, can generate following file: proc/asound/card1, under card1 catalogue, can find pcm0c and pcm0p, the sound pick-up outfit of the USB earphone-microphone that pcm0c representative is inserted, the tone playing equipment of the USB earphone-microphone that pcm0p representative is inserted, under the catalogue of pcm0c, can find info file, described info file has been preserved the driver of sound card information that we need, such as;
card:?1
device:?0
subdevice:?0
stream:?CAPTURE
id:?USB?Audio
name:?USB?Audio
By above-mentioned information, the USB earphone-microphone that can obtain insertion is registered as the registered card0 of being of loudspeaker that card1(system carries in Android system), current data stream is recording audio stream.
As shown in Figure 2, above-mentioned steps S101 can specifically be refined as following steps:
S201, travel through in real time the LOGIN directory of Android system, specifically can travel through in real time by calling the Out_write function of Android system;
S202, in described LOGIN directory, find out driver of sound card catalogue;
S203, in described driver of sound card catalogue, find out driver of sound card corresponding to USB wireless audio devices of having registered with insert in Android system.
Pass through said method, can find all driver of sound cards of having registered in Android system, certainly, before this step, also need to make this USB wireless audio devices can be by Android system identification, then could in LOGIN directory, register, so also comprise before step S101: when Android system detects the insertion of USB wireless audio devices, register the driver of sound card that this USB wireless audio devices is corresponding in LOGIN directory.
In step S102, find out after registered driver of sound card, need to judge that can the driver of sound card that described USB wireless audio devices is corresponding normally use, the function for opening driver of sound card that specifically can carry by Android system goes traversal as trials such as snprintf function and open functions and opens all driver of sound cards except system carries the driver of sound card that audio frequency apparatus is corresponding (card0), as card1, the driver of sound card that card2 is corresponding, if can open these driver of sound cards, this proof driver of sound card can normally be used, and record driver of sound card and number, then the function that is used for closing driver of sound card by system call is as close function, close these openable driver of sound cards, if can not open current driver of sound card, can attempt opening next driver of sound card, until traveled through all driver of sound card equipment.
Concrete, in this step S102, first judge whether to open driver of sound card corresponding to described USB wireless audio devices.If can open described driver of sound card, judge that described driver of sound card can normally be used, and close described driver of sound card.The described herein driver of sound card of closing, just temporary close, for checking that can driver of sound card work, is not also normally used, so be temporary closing, reopens the driver of sound card equipment needing during follow-up use again.If can not open described driver of sound card, judge that described driver of sound card can not normally be used.
In step S103, after having judged that driver of sound card that described USB wireless audio devices is corresponding can normally be used, can open first driver of sound card that can normally use except system carries the driver of sound card that audio frequency apparatus is corresponding detecting in LOGIN directory, this driver of sound card correspondence the USB wireless audio devices inserting, to realize audio-frequency function by this corresponding USB wireless audio devices.Or also can then open the driver of sound card with this mark by increase by a mark for driver of sound card, by corresponding USB wireless audio devices, realize audio-frequency function, so step can specifically be refined as following steps, as shown in Figure 3,
S301, when described driver of sound card can normally be used, for described driver of sound card increases by a mark;
S302, shielding Android system carry audio frequency apparatus, specifically can carry the audio frequency apparatus that driver of sound card that audio frequency apparatus is corresponding comes shielding harness to carry by closing Android system;
S303, open the markd driver of sound card of tool, by corresponding USB wireless audio devices, realize audio-frequency function.
It should be noted that, the present invention also can ban use of USB wireless audio devices by this prohibitory sign by increase prohibitory sign in driver of sound card, and the audio frequency apparatus being carried by system is realized audio-frequency function, and principle is the same.Card1 under proc/asound/ catalogue is in the present invention only after USB wireless audio devices is connected to Android system equipment and be identified just and there will be in addition, in like manner, card2, card3 ... card7 just there will be after corresponding USB wireless audio devices is connected to Android system equipment, and when not having USB wireless audio devices to be connected to Android system equipment, only have card0 to exist.And in the present invention, be with USB wireless audio devices, to be output as example to describe, and sound-recording function is also to realize after the same method.
The present invention can be applicable in multiple smart machine, for example mobile phone, PAD, TV etc.And because out_write function is that real-time circulation calls in audio transmission process, so also carry out in real time for the judgement that whether has USB wireless audio devices to be connected in Android system, therefore, the hot plug of USB wireless audio devices can not impact for audio frequency broadcasting etc., can realize with inserting with use.
Pass through said method, voice data treatment scheme of the present invention, finally by USB wireless audio devices, to be realized the audio-frequency functions such as recording or playback, it has increased processing at Out_write function place, judges whether current Android system equipment has connected USB wireless audio devices, if connected, by this USB wireless audio devices, realize audio-frequency function, and mask the audio frequency apparatus carrying, and if not connection still realizes audio-frequency function by carrying audio frequency apparatus.
Based on said method, the present invention also provides a kind of system of supporting USB wireless audio devices that realizes in Android system, and as shown in Figure 4, it comprises:
Driver of sound card is searched module 100, and for when needs are realized audio-frequency function, the LOGIN directory of traversal Android system, finds out the driver of sound card corresponding with described USB wireless audio devices of having registered in Android system;
Driver of sound card judge module 200, for judging whether the driver of sound card that described USB wireless audio devices is corresponding can normally use;
Audio frequency apparatus handover module 300, for when driver of sound card corresponding to described USB wireless audio devices can not normally be used, the audio frequency apparatus being carried by system is realized the audio-frequency functions such as recording, playback; And when driver of sound card corresponding to the USB of described insertion wireless audio devices can normally be used, shield Android system and carry audio frequency apparatus, and open described driver of sound card, switch to by the USB wireless audio devices corresponding with this driver of sound card and realize audio-frequency function.
Further, as shown in Figure 5, described driver of sound card is searched module 100 and is comprised:
LOGIN directory traversal unit 110, for traveling through in real time the LOGIN directory of Android system;
Driver of sound card directory search unit 120, for finding out driver of sound card catalogue at described LOGIN directory;
Driver of sound card is searched unit 130, for find out driver of sound card corresponding to the USB wireless audio devices with inserting of having registered in Android system in described driver of sound card catalogue.Before the function of above-mentioned each unit, have detailed description, therefore repeat no more.
Further, as shown in Figure 6, described audio frequency apparatus handover module 300 comprises:
Enable unit 330, for opening the markd driver of sound card of tool, to enable corresponding USB wireless audio devices, realize the audio-frequency functions such as recording or playback.
Before the function of above-mentioned each unit, have detailed description, therefore repeat no more.
In sum, the present invention realizes the method and system of supporting USB wireless audio devices in Android system, in driver of sound card driver of sound card corresponding to the audio frequency apparatus that carries except system in LOGIN directory being detected, can normally open in addition driver of sound card time, confirm to have inserted USB wireless audio devices in this Android system, then system is carried to audio frequency apparatus and close, by USB wireless audio devices, realize audio-frequency function.Obviously, the present invention improves by simple, makes the smart machine of numerous Android systems all can utilize USB wireless audio devices to realize audio-frequency function, has met user's demand, has facilitated people's use.
Should be understood that, application of the present invention is not limited to above-mentioned giving an example, and for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (8)
1. in Android system, realize a method of supporting USB wireless audio devices, it is characterized in that, comprise step:
A, when needs are realized audio-frequency function, the LOGIN directory of traversal Android system, finds out the driver of sound card corresponding with described USB wireless audio devices of having registered in Android system;
B, judge whether the driver of sound card that described USB wireless audio devices is corresponding can normally use;
C, when described driver of sound card can normally be used, shield Android system and carry audio frequency apparatus, and open described driver of sound card, drive described USB wireless audio devices to realize audio-frequency function.
2. in Android system, realize according to claim 1 the method for supporting USB wireless audio devices, it is characterized in that, before described steps A, also comprise:
A0, when Android system detects the insertion of USB wireless audio devices, in LOGIN directory, register the driver of sound card that this USB wireless audio devices is corresponding.
3. in Android system, realize according to claim 1 the method for supporting USB wireless audio devices, it is characterized in that, described steps A specifically comprises:
A1, travel through in real time the LOGIN directory of Android system;
A2, in described LOGIN directory, find out driver of sound card catalogue;
A3, in described driver of sound card catalogue, find out driver of sound card corresponding to USB wireless audio devices of having registered with insert in Android system.
4. in Android system, realize according to claim 1 the method for supporting USB wireless audio devices, it is characterized in that, described step C specifically comprises:
C1, when described driver of sound card can normally be used, for described driver of sound card increases by a mark;
C2, shielding Android system carry audio frequency apparatus;
C3, open the markd driver of sound card of tool, by corresponding USB wireless audio devices, realize audio-frequency function.
5. in Android system, realize according to claim 4 the method for supporting USB wireless audio devices, it is characterized in that, described step C also comprises:
When described driver of sound card can not normally be used, by Android system, carry audio frequency apparatus and realize audio-frequency function.
6. in Android system, realize a system of supporting USB wireless audio devices, it is characterized in that, comprising:
Driver of sound card is searched module, and for when needs are realized audio-frequency function, the LOGIN directory of traversal Android system, finds out the driver of sound card corresponding with described USB wireless audio devices of having registered in Android system;
Driver of sound card judge module, for judging whether the driver of sound card that described USB wireless audio devices is corresponding can normally use;
Audio frequency apparatus handover module, for when described driver of sound card can normally be used, shields Android system and carries audio frequency apparatus, and open described driver of sound card, drives described USB wireless audio devices to realize audio-frequency function.
7. in Android system, realize according to claim 6 the system of supporting USB wireless audio devices, it is characterized in that, described driver of sound card is searched module and is comprised:
LOGIN directory traversal unit, for traveling through in real time the LOGIN directory of Android system;
Driver of sound card directory search unit, for finding out driver of sound card catalogue at described LOGIN directory;
Driver of sound card is searched unit, for find out driver of sound card corresponding to the USB wireless audio devices with inserting of having registered in Android system in described driver of sound card catalogue.
8. in Android system, realize according to claim 6 the system of supporting USB wireless audio devices, it is characterized in that, described audio frequency apparatus handover module comprises:
Indexing unit, for when described driver of sound card can normally be used, for described driver of sound card increases by a mark;
Screen unit, carries audio frequency apparatus for shielding Android system;
Enable unit, for opening the markd driver of sound card of tool, to enable corresponding USB wireless audio devices, realize audio-frequency function.
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| CN104159147A (en) * | 2014-08-05 | 2014-11-19 | 乐视致新电子科技（天津）有限公司 | Method and device for switching to external audio input-output equipment |
| CN104267924A (en) * | 2014-09-19 | 2015-01-07 | 青岛海信移动通信技术股份有限公司 | Mobile terminal and audio processing method thereof |
| CN106303824A (en) * | 2016-07-29 | 2017-01-04 | 青岛海信电器股份有限公司 | Audio frequency apparatus changing method and device |
| CN106998515A (en) * | 2016-01-25 | 2017-08-01 | 徐文波 | External sound card control method and device |
| CN107360495A (en) * | 2016-05-10 | 2017-11-17 | 环旭电子股份有限公司 | Suitable for the method for reducing External microphone plug noise of Android system |
| CN109819108A (en) * | 2019-01-04 | 2019-05-28 | Oppo广东移动通信有限公司 | Method, apparatus, electronic equipment and the storage medium of adjustment driving parameter |
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| CN104159147A (en) * | 2014-08-05 | 2014-11-19 | 乐视致新电子科技（天津）有限公司 | Method and device for switching to external audio input-output equipment |
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