CN101192203A - Mobile phones audio frequency playing method - Google Patents
Mobile phones audio frequency playing method Download PDFInfo
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- CN101192203A CN101192203A CNA2006101459918A CN200610145991A CN101192203A CN 101192203 A CN101192203 A CN 101192203A CN A2006101459918 A CNA2006101459918 A CN A2006101459918A CN 200610145991 A CN200610145991 A CN 200610145991A CN 101192203 A CN101192203 A CN 101192203A
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Abstract
The invention relates to a mobile phone audio play method which adopts an audio driver of multi audio play. The method includes the following steps: an application program or process is directly called; the application program or process controls the write in of corresponding sound data and the priority of the sound data inside a play list set up by the audio driver; the audio driver transmits the sound data to a play buffer area according to the priority; finally, the sound data is transmitted to audio equipment through the play buffer area to be played. The method, which adds a play list recording a plurality of parallel sound data inside the audio driver, selects the sound data of higher priority to play; moreover, the method can also select the sound data needing to be played at the same time to be played after being mixed with the sound data of higher priority; therefore, the method avoids the complicated interprocess communication, synchronization and mass data transmission caused by single sound service program management; meanwhile, adopting an extended universal standard interface function ensures relatively simple program portability and fully meets the requirements of sound play management of a mobile phone.
Description
Technical field
The present invention relates to a kind of acoustic management of embedded OS, relate in particular to a kind of mobile radio terminal sound intermediate frequency player method.
Background technology
At present, the most typical embedded OS on mobile phone, the PDA terminal is Linux and WinCE.With Linux is example, and general application program plays sound, and calls open () in the (SuSE) Linux OS, ioctl (), write (), read (), close sound interfaces such as () function usually, finishes concrete broadcast by audio driver operating audio equipment.
When audio driver is employed routine call, can in internal memory, create the DMA data buffer,, comprise some buffer cells as Fig. 1.The method that plays sound of existing audio driver as Fig. 2, comprising: 210) beginning; 220) judge whether the DMA data buffer has voice data; Be to change step 230 over to); , do not enter next step; 221) etc. pending data returns step 220); 230) play this voice data; 240) finish.For avoiding control hazard, the open () interface function of this audio driver correspondence specifically as Fig. 3, comprising: 310) beginning; 320) do you judge whether this audio frequency apparatus idle? be to enter next step; , do not change step 331 over to); 330) it is occupied this audio frequency apparatus to be set, and returns success; Change step 340 over to); 331) block or return and make mistakes; 340) finish.Therefore, this audio driver can not be called simultaneously, control by a plurality of application programs, this makes: 1. simple audio frequency apparatus does not allow to be used, play sound separately simultaneously by a plurality of application programs, and back one application program last application program such as has only to use, could use after having closed audio frequency apparatus; Though 2. allow to play simultaneously and record, but do not support to play with recording and take different sampling rates, be that the in progress application program and the application program of recording are interactive, such as, it is 44100 that in progress program is provided with sampling rate, if this moment, recorded program was arranged to 8000 with sampling rate, then our sound heard can become very overcast slow sound, has modified tone.
Typical mobile phone, PDA terminal have numerous scenes when the user uses, such as incoming call, make a phone call in, MP3 play in, come short message, ring in the quarter-bell or the like.These scenes may be concurrent, when therefore cell phone software is developed, must run into Tathagata electric bell sound, keypad tone, quarter-bell sound, short message prompt sound, MP3 music or the like various sound needs to play, and these sound have characteristics separately again: 1. come the electric bell sound, in real time, priority is the highest, no matter what was being done at that time, as long as incoming call is arranged, just must broadcast the prompting of bell sound at once, and can not be interrupted by the centre; 2. the characteristics of keypad tone are often will play simultaneously with other sound, no matter whether playing other sound, a button just should have auditory tone cues; 3. the characteristics of MP3 music are that reproduction time is generally very long, during playing, other a lot of things may take place, and have a lot of other sound to need to play, and in general, the MP3 music should be suspended this moment.Therefore, must preferentially play and play simultaneously.
The problems referred to above can solve like this: 1. increase the sound card hardware device, a plurality of application programs are opened different sound cards simultaneously, but increase the mobile phone terminal cost like this; 2. adopt the audio mixing technology, all sound that will play are carried out audio mixing, this just can separate problem and the interactive problem of playback that must not play simultaneously; Present PC goes up way and just is to use an independent service routine, is responsible for sound card equipment is managed, and various sound are had the queuing of priority, and the sound that priority is high is play earlier.This service routine is all transferred in the operation of sound card finished, other any application should oneself not operated sound card, and other application can only be carried out corresponding operation by method notification service program from message to service routine that send out.The embedded OS that but this method is applied to terminals such as mobile phone, PDA has two distinct disadvantage: (one) this service routine is realized complicated, consider multiple situation: simple bell sound, can directly use filename to do message parameter, call the codec decompress(ion) by service routine, the direct control sound card is play; The MP3 music, because the MP3 player has called the codec decompress(ion), therefore service routine need only directly be write the data of untiing the sound card broadcast, but need to consider that how data are delivered to service routine from media player is a problem, owing to being two different processes and needing data quantity transmitted very big again, so just need mass data transmission mechanism between complicated Inter-Process Communication and synchronization mechanism and process; (2) this method is not easy to transplant existing other handset program, because existing other handset program all is that the direct control sound card plays sound, therefore can conflict with this system, brings very big trouble to transplanting.
Summary of the invention
The technical issues that need to address of the present invention are, how a kind of mobile phones audio frequency playing method is provided, can realize that sound according to priority plays, mass data transmission mechanism between complicated Inter-Process Communication and synchronization mechanism and process be can avoid simultaneously, simple mobile radio terminal or intelligent terminal are suitable for; Play when further also can realize multiple sound; Further also but settlement procedure is transplanted problem.
The technology of the present invention problem solves like this, and a kind of mobile phones audio frequency playing method is provided, and the audio driver that adopts unified management audio frequency apparatus multitone to play frequently may further comprise the steps:
1.1) application program or process directly call described audio driver;
1.2) the playlist correspondence position control created at described audio driver of application program or process writes corresponding voice data and priority thereof;
1.3) described audio driver moves described voice data to play buffer from high to low by described priority;
1.4) give described audio frequency apparatus transmission voice data and send the broadcast of instruction control audio frequency apparatus by described play buffer.
According to audio frequency playing method provided by the invention, a record of the corresponding described playlist of each application program or process, its corresponding voice data and priority write the sound data items and the prioritized item of this record.
According to audio frequency playing method provided by the invention, described sound data items is that voice data writes play buffer data buffer before.
According to audio frequency playing method provided by the invention, described calling comprises and calling first and subsequent calls.
According to audio frequency playing method provided by the invention, described calling first comprises that creating described playlist reaches the wherein corresponding record that calls the application program or the process of audio driver first.
According to audio frequency playing method provided by the invention, described subsequent calls only comprises creates the corresponding record that calls the application program or the process of audio driver in the described playlist.
According to audio frequency playing method provided by the invention, this method comprises that also application program or process close the described audio driver that it calls, and described closing comprises and formerly discharging and last is closed the audio driver mode.
According to audio frequency playing method provided by the invention, the described audio driver mode that formerly discharges comprises: the record of deleting this application program or process correspondence in described playlist; Judge that described playlist is not empty, directly return success.
According to audio frequency playing method provided by the invention, described last is closed the audio driver mode and is comprised: the record of deleting this application program or process correspondence in described playlist; Judge that described playlist is for empty; Delete this playlist, close audio frequency apparatus; Return success.
According to audio frequency playing method provided by the invention, described playlist can be array, single-track link table or doubly linked list.
A kind of mobile phones audio frequency playing method provided by the invention, at the inner playlist that increases a plurality of parallel voice datas of record of audio driver, select the voice data of high priority to play during broadcast, further also can select to play again behind the voice data audio mixing of the voice data that need play simultaneously and high priority, this audio driver of types of applications routine call is finished current sound playing on this basis, can avoid the Inter-Process Communication of the complexity that causes by single sound service routine administrative institute, the work synchronous and mass data is transmitted, add the general standard interface function that uses expansion, make program portable simple relatively, fully satisfied mobile phone, PDA terminal sound playing management expectancy.
Description of drawings
Fig. 1 is the DMA buffer zone structural representation that audio driver is created in internal memory.
Fig. 2 is the sound playing schematic flow sheet of common audio driver.
Fig. 3 is the schematic flow sheet of the open () function corresponding with common audio driver.
Fig. 4 is playlist and the DMA buffer zone structural representation that audio driver of the present invention is created in internal memory.
Fig. 5 is the sound playing schematic flow sheet of audio driver of the present invention.
Fig. 6 is the schematic flow sheet of expansion the open () function corresponding with audio driver of the present invention.
Fig. 7 is the schematic flow sheet of expansion the close () function corresponding with audio driver of the present invention.
Embodiment
At first, design philosophy of the present invention is described: at the audio driver layer all sound of total system are carried out unified management, different application or process are directly called this audio driver, realize a plurality of sound playing synchronously and coordinate, do not disturb mutually.
Secondly, key of the present invention is described: at the inner administration module that increases of audio driver, mainly be to increase a playlist, the in progress sound of stored record, structure comprise some SoundRecs as shown in Figure 4, each recording setting has prioritized item, plays attribute item, voice data buffer cell item simultaneously, this voice data buffer cell item is corresponding with the DMA data buffer that audio driver is created, and this playlist also can comprise other, as allowing to suspend item or the like.
This audio driver sound is play management, as shown in Figure 5, specifically comprises following concrete steps:
510) beginning;
520) do you judge that SoundRec is arranged in the playlist?, do not enter step 521); Be to enter step 530);
521) wait for SoundRec, return step 520);
530) search the highest SoundRec of priority; Search the high SoundRec of priority specifically can adopt search, ordering etc.
540) do you judge in the corresponding voice data buffer cell of this SoundRec item that voice data is arranged?, do not enter step 541); Be to enter step 550);
541) wait for voice data, return step 540);
550) this voice data is moved to the DMA buffer zone;
560) do you judge have in the playlist that to play attribute simultaneously be genuine SoundRec?, do not change step 590 over to); Be to enter next step;
570) do you judge in the corresponding voice data buffer cell of this SoundRec item that voice data is arranged?, do not enter step 571); Be to enter step 580);
571) wait for voice data, return step 570);
580) this voice data is moved in the DMA buffer zone with stacked system;
590) data that play sound
Like this, the voice data buffer cell item content of the SoundRec correspondence that audio driver of the present invention is high with the playlist medium priority is transferred to the DMA data buffer; Further, be that the voice data buffer cell item content of genuine SoundRec correspondence is transferred to DMA data buffer and its legacy data audio mixing with playing attribute in the playlist simultaneously, be resent to audio frequency apparatus and play.Assist, audio driver of the present invention is also in step 580) set up audio mixing mechanism, use fixing sampling rate and channel number when promptly opening sound card, the voice data of all other sampling rates is implemented to resample.Such as, the parameter of opening sound card can be set be fixing 44100Hz, two-channel, other any sound that do not conform to all carry out the resampling of software or hardware.
Further, application program calling audio driver of the present invention is described, this calling can have various ways, the principle of optimality is: the standard interface of not changing audio driver, just do suitable expansion, as: these interface names and number of parameters thereof, parameter type, rreturn value are not made any modification, only parameter range is done suitable expansion, can reduce the difficulty of transplanting so to greatest extent.
Concrete, be that example explanation the preferable of audio driver of the present invention calls with (one) expansion open () interface function, (two) expansion close () interface function and (three) expansion ioctl () interface function:
(1) expansion open () interface function is revised return parameters and is made a plurality of application programs open sound card equipment simultaneously, as shown in Figure 6, specifically may further comprise the steps:
610) beginning;
620) do you judge that audio frequency apparatus opens?, do not enter step 630); Be to change step 631 over to);
630) start audio driver, create playlist;
640) current voice data of record and priority thereof, and play attribute simultaneously; Change step 650 over to);
631) do you judge the sound that has priority higher in the playlist?, do not change step 641 over to); Be to enter next step;
Can 632) do you judge that new sound abandon?, do not enter step 641); Be to change step 650 over to);
641) current voice data of record and priority thereof, and play attribute simultaneously;
650) return success;
660) finish.
This expansion open () interface function need be provided with two parameters: numerical priority value i and play attribute Boolean j simultaneously as from the foregoing, this can be provided with by expansion ioctl () interface function, and open () interface function only is provided with default priority numerical value and play the attribute Boolean simultaneously, invoke extensions open () interface function just can use canonical parameter like this, meet general use habit, program portable is simple.
(2) expansion close () interface function is revised its shutoff operation to audio frequency apparatus, only just closes audio frequency apparatus and delete playlist when no any voice data needs to play again, as shown in Figure 7, specifically may further comprise the steps:
710) beginning;
720) the corresponding SoundRec of deletion;
730) do you judge whether also there are other SoundRecs in the playlist?, do not enter next step; Be to change step 760 over to);
740) deletion playlist;
750) audio driver out of service is closed audio frequency apparatus;
760) return success;
770) finish.
(3) expansion ioctl () interface function
Keeping the ioctl function return value, number of parameters under the constant situation of parameter type, increases the function that numerical priority value is set and plays attributes such as attribute Boolean simultaneously.Invoke extensions ioctl () interface function just can use standard format like this, meets general use habit, also meets interface fixing between driver and the application program simultaneously, and program portable is simple.
Some application programs can be simultaneously, staggered or parallel calling expansion open (), ioctl (...), close () and write () interface function can be realized the preferential broadcast of many sound and broadcast simultaneously, wherein expands data rewriting that write () interface function writes former write () interface function play buffer in the playlist in the corresponding record in the space corresponding with play buffer.The method that each application call interface function plays sound specifically can be: invoke extensions open () generates the record space of playlist or playlist; Invoke extensions ioctl (...) writes priority and plays attribute simultaneously in corresponding space; Call write () and write voice data in the corresponding record space; Invoke extensions close (), this application program finishes, and removes to discharge the corresponding record space.
At last, resolve the concrete vocal clash of the present invention with example and handle: audio driver of the present invention is being play current sound, and at this moment the Another Application program is play another sound by expansion interface function request audio driver of the present invention, then:
(1) priority of described another sound of judgement if other SoundRec in current sound of priority ratio and the playlist is all high, is then play new sound, and original sound is ended to play.
(2) priority of described another sound of judgement if other SoundRec in current sound of priority ratio and the playlist is low, if this moment, described another sound can be abandoned, does not then add tabulation with described another sound; If can not be abandoned, then described another sound is added tabulation, by the time higher than its priority sound has finished entirely, then this new sound just can have been play, before playing,, only write the voice data buffer cell item of playlist to the write () request of calling of described another sound, write full back time-out and write, wait for that data are moved into just continuation again of play buffer in the voice data buffer cell item.
(3) if described another sound needs to play immediately, and the sound of current broadcast can not suspend, and can take audio mixing.
In sum, audio driver sound management method of the present invention has been realized the preferential management of many sound and has play simultaneously that the combined standard interface interchange can be transplanted problem by settlement procedure.
Claims (10)
1. a mobile phones audio frequency playing method is characterized in that, the audio driver that adopts unified management audio frequency apparatus multitone to play frequently may further comprise the steps:
1.1) application program or process directly call described audio driver;
1.2) the playlist correspondence position control created at described audio driver of application program or process writes corresponding voice data and priority thereof;
1.3) described audio driver moves described voice data to play buffer from high to low by described priority;
1.4) give described audio frequency apparatus transmission voice data and send the broadcast of instruction control audio frequency apparatus by described play buffer.
2. according to the described audio frequency playing method of claim 1, it is characterized in that, a record of the corresponding described playlist of each application program or process, its corresponding voice data and priority write the sound data items and the prioritized item of this record.
3. according to the described audio frequency playing method of claim 2, it is characterized in that described sound data items is that voice data writes play buffer data buffer before.
4. according to the described audio frequency playing method of claim 1, it is characterized in that described calling comprises and calling first and subsequent calls.
5. according to the described audio frequency playing method of claim 4, it is characterized in that described calling first comprises that creating described playlist reaches the wherein corresponding record that calls the application program or the process of audio driver first.
6. according to claim 4 or 5 described audio frequency playing methods, it is characterized in that described subsequent calls only comprises creates the corresponding record that calls the application program or the process of audio driver in the described playlist.
7. according to the described audio frequency playing method of claim 1, it is characterized in that this method comprises that also application program or process close the described audio driver that it calls, described closing comprises and formerly discharging and last is closed the audio driver mode.
8. according to the described audio frequency playing method of claim 7, it is characterized in that the described audio driver mode that formerly discharges comprises: the record of deleting this application program or process correspondence in described playlist; Judge that described playlist is not empty, directly return success.
9. according to the described audio frequency playing method of claim 7, it is characterized in that described last is closed the audio driver mode and comprised: the record of deleting this application program or process correspondence in described playlist; Judge that described playlist is for empty; Delete this playlist, close audio frequency apparatus; Return success.
10. according to the described audio frequency playing method of claim 1, it is characterized in that described playlist can be array, single-track link table or doubly linked list.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101459918A CN101192203A (en) | 2006-11-30 | 2006-11-30 | Mobile phones audio frequency playing method |
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| CNA2006101459918A CN101192203A (en) | 2006-11-30 | 2006-11-30 | Mobile phones audio frequency playing method |
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| CN102033775A (en) * | 2009-09-28 | 2011-04-27 | 联想(北京)有限公司 | Sound management module and method for data processing equipment |
| CN102376325A (en) * | 2010-08-25 | 2012-03-14 | 黄静 | Mixed play system for multiple audio files and control method for mixed play system |
| CN102665163A (en) * | 2012-04-09 | 2012-09-12 | 深圳市领华卫通数码科技有限公司 | Method for controlling sound channel of car sound system |
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| CN103383844A (en) * | 2012-05-04 | 2013-11-06 | 盛乐信息技术（上海）有限公司 | Voice synthesis method and system |
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| CN103596641A (en) * | 2012-10-18 | 2014-02-19 | 华为终端有限公司 | Audio frequency managing method and device |
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