CN1307550C - Method for united controlling sound channel of computer via intermediate hier - Google Patents
Method for united controlling sound channel of computer via intermediate hier Download PDFInfo
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- CN1307550C CN1307550C CNB2003101023888A CN200310102388A CN1307550C CN 1307550 C CN1307550 C CN 1307550C CN B2003101023888 A CNB2003101023888 A CN B2003101023888A CN 200310102388 A CN200310102388 A CN 200310102388A CN 1307550 C CN1307550 C CN 1307550C
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Abstract
The present invention relates to a method for united controlling voice frequency channels of a computer through a middle layer, which comprises the following steps: firstly, initializing a sound card, selecting a voice frequency channel to be controlled uniformly, and setting a timer for the selected channel; then, designating a callback function which responses the timer to be a voice frequency control interface for refreshing an application program; finally, monitoring the change of the state of the voice frequency channel of an operating system. As the timer arrives at set time, according to the state of the voice frequency channels of the system, the voice frequency control interface of the application program to refreshed. Because the middle layer is arranged between voice control of the system and the application program, a voice state between the system and other application programs can be kept synchronously by the present invention.
Description
Technical field
The present invention relates to a kind of control method of computer audio channel, especially about a kind of method of the computer audio channel being unified control by the middle layer.
Background technology
At present, more and more ripe along with multimedia technology, computing machine are strengthening progressively that it is recreational, and not only Video processing is more and more smooth, and is also more and more higher to the requirement of Audio Processing.In order to comply with this trend, except computer operating system is more and more paid attention to the Audio Processing ability, independently Audio Processing application program has appearred accordingly also in a large number.
With regard to computer operating system, no matter be at Windows or under Linux, operating system all provides the interface of control sound size and left and right acoustic channels.But at present a lot of application programs usually can be brought some doubt to the user when regulating sound status.Cite a plain example: a user opens a music player, playing back music.He is set to quiet by system sounds state when leaving.And another user re-uses in this player on this computing machine, he does not also know that the someone has changed system's setting, he can't directly observe the variation of sound status from player, therefore, though he finds that player is in broadcast state, the loudspeaker of computing machine is not but sounded.
The basic reason of this phenomenon is, though the sound status of system has changed, but other application program of this moment also can't be learnt the variation of sound status, therefore caused the sound status of system and the disunity at the sound control interface of application program, this causes suitable doubt to a lot of users.
Have again, continuous enhancing along with the sound card function, its various channels that provide are also in continuous increase, for example: VOL, PCM, CD, BASS, TREBLE, MIC, LINE or the like, and a lot of channels also have the branch of left and right sides balance, therefore application program is in these channels of control, and not having unified access interface can use, especially under (SuSE) Linux OS.If each application program all removes to control sound device by own mode, not only can bring certain exploitation complexity, and might cause the conflict that takies of audio output device.
Summary of the invention
The present invention provides a kind of by the method for middle layer to the unified control of computer audio channel for addressing the above problem, realized between application program and the system sound status synchronously.
The invention provides a kind ofly by the method for middle layer to the unified control of computer audio channel, is to set up a middle layer between operating system and application program, and in order to the state of unified control audio channel, this method comprises the steps: the state of initialization sound card; Select the voice-grade channel of the unified control of desire; For this selected channel is provided with timer; Readjustment (Callback) function (Function) of this timer of response is appointed as refreshes (Refresh) application program audio frequency control interface; The state variation of monitor operating system voice-grade channel; At timer to constantly according to the state refresh application program audio frequency of system audio channel control interface; Wherein said middle layer supplies respectively this application call with the form of shared library, and respectively this application program is read and write the numerical value of specified voice channel and the interface of state by calling an example program.
The present invention is owing to set up a middle layer between system sounds control and each application program, thereby can keep the sound status between system and other application program synchronous, use the present invention can unify calling system sound control mode, simplified sound control interface, and realized that sound status manages automatically, when switching the sound channel state, preserve sound numerical value, be each application program preservation sound channel state and sound numerical value separately, the state and the numerical value of multichannel can also be set simultaneously.
Description of drawings
Fig. 1 is that the present invention is by the method flow diagram of middle layer to the unified control of computer audio channel;
Fig. 2 is an initialization procedure process flow diagram proposed by the invention;
Fig. 3 is an applied environment synoptic diagram of the present invention; And
Fig. 4 is the embodiments of the invention process flow diagrams.
Wherein, description of reference numerals is as follows:
The state of step 101 initialization sound card
The call back function that step 104 will respond this timer is appointed as and is refreshed application program audio frequency control interface
The state variation of step 105 monitor operating system voice-grade channel
Step 401 is opened sound card equipment, checks the support situation of sound card to each sound channel
Step 402 is judged the state of each sound channel, writes down current sound numerical value
Step 403 keeps the state and the volume numerical value of each sound channel, and it is normal setting PCM sound channel state, and volume is set to the numerical value of last record
Timer that is spaced apart 1 second of step 404 registration, the acoustic channel of specified response timer is the PCM channel simultaneously, call back function is appointed as player sound control interface refreshes function
Whether step 405 monitoring system sound status changes
Step 406 judges whether the channel that changes is the channel of having registered timer
Step 407 is called the call back function of registering, and refreshes controls such as the control of player interface volume scroll bar, left and right acoustic channels balance strip and mute option
Whether step 408 inquiry timer is stopped
Step 409 process ends
Embodiment
The invention provides a kind of by the method for middle layer to the unified control of computer audio channel, be between operating system and application program, to set up a middle layer, in order to the state of unified control audio channel, as shown in Figure 1, this method comprises the steps: the state (step 101) of initialization sound card; Select the voice-grade channel (step 102) of the unified control of desire; For this selected channel is provided with timer (step 103); The call back function of this timer of response is appointed as refreshes application program audio frequency control interface (step 104); The state variation (step 105) of monitor operating system voice-grade channel; At timer to constantly according to the state refresh application program audio frequency of system audio channel control interface (step 106).
As shown in Figure 2, this initialization step comprises: open sound card equipment, check the support situation (step 201) of sound card to each sound channel; Judge the state of each sound channel, write down current sound numerical value (step 202); Set the state and the volume numerical value (step 203) of each sound channel.
The step of the state of above-mentioned each sound channel of setting can be the state that keeps each sound channel.That the state of each sound channel can be set at is invalid, normal, L channel, R channel and quiet etc.These voice-grade channels can comprise VOL, PCM, CD, BASS, TREBLE, MIC and LINE or the like.
The sound numerical value of current left and right acoustic channels can be preserved before the state of L channel and R channel switches automatically, when the sound channel state switches back, the numerical value of this preservation can be recovered automatically.
The step of the volume numerical value of above-mentioned each sound channel of setting can be the numerical value that is set to last record.
The present invention has set up a middle layer between system sounds control and application program, as shown in Figure 3, sound key-course of the present invention supplies each application call with the form of shared library, and each application program is read and write the numerical value of specified voice channel and the interface of state by calling (Call) its example (Instance).
Seeing also Fig. 4, is example with audio player control PCM, MIC channel, and implementation procedure of the present invention is described.At first open sound card equipment, check the support situation (step 401) of sound card each sound channel; Judge the state of each sound channel, write down current sound numerical value (step 402); The state and the volume numerical value that keep each sound channel, it is normal setting PCM sound channel state, volume is set to the numerical value (step 403) of last record; Register a duration and be 1 second timer, the acoustic channel of specified response timer is the PCM channel simultaneously, call back function is appointed as player sound control interface refreshes function (step 404); Monitoring system sound status whether change (step 405) then; If change, judge then then whether the channel that changes is the channel (step 406) of having registered timer; If this channel then calls the call back function of registering, refresh controls (Control) (step 407) such as the control of player interface volume scroll bar, left and right acoustic channels balance strip and mute option; If system sounds does not change, perhaps the acoustic channel of Bian Huaing is not an acoustic channel of having registered timer, then do not do action, after 1 second time interval, whether the inquiry timer is stopped (step 408), if do not stop, then continuing the monitoring system sound variation, if timer has stopped, process ends (step 409) then.
The above is preferred embodiment of the present invention only, is not to be used for limiting practical range of the present invention; All equalizations of doing according to description of the present invention change and modify, and are claim of the present invention and contain.
Claims (9)
1, a kind of by the method for middle layer to the unified control of computer audio channel, be between operating system and application program, to set up a middle layer, the state in order to unified control audio channel is characterized in that this method comprises the steps:
The state of initialization sound card;
Select the voice-grade channel of the unified control of desire;
For this selected channel is provided with timer;
The call back function of this timer of response is appointed as refreshes application program audio frequency control interface;
The state variation of monitor operating system voice-grade channel; And
At timer to constantly according to the state refresh application program audio frequency of system audio channel control interface;
Wherein said middle layer supplies respectively this application call with the form of shared library, and respectively this application program is read and write the numerical value of specified voice channel and the interface of state by calling an example program.
2, as claimed in claim 1 by the method for middle layer to the unified control of computer audio channel, it is characterized in that this initialization step comprises:
Open sound card equipment, check the support situation of sound card each sound channel;
Judge the state of each sound channel, write down current sound numerical value; And
Set the state and the volume numerical value of each sound channel.
3, as claimed in claim 2ly it is characterized in that by the method for middle layer to the unified control of computer audio channel this sets the step of the state of each sound channel, can be the state that keeps each sound channel.
4, as claimed in claim 2ly it is characterized in that by the method for middle layer this sets the step of the state of each sound channel, can be set at invalid, normal, L channel, R channel and mute state the unified control of computer audio channel.
5, as claimed in claim 4 by the method for middle layer to the unified control of computer audio channel, it is characterized in that, before switching, this L channel and R channel state can preserve the sound numerical value of current left and right acoustic channels automatically, when the sound channel state switches back, can recover the numerical value of this preservation automatically.
6, as claimed in claim 2ly it is characterized in that by the method for middle layer the step that this sets the volume numerical value of each sound channel can be the numerical value that is set to last record to the unified control of computer audio channel.
7, as claimed in claim 1ly it is characterized in that the time that the time interval of this timer can respond as required and automatic setting by the method for middle layer to the unified control of computer audio channel.
8, as claimed in claim 1ly it is characterized in that by the method for middle layer the step that this refreshes application program audio frequency control interface is on the relevant control of the present application program of change list of system audio state to the unified control of computer audio channel.
9, as claimed in claim 1 by the method for middle layer to the unified control of computer audio channel, it is characterized in that this voice-grade channel comprises VOL, PCM, CD, BASS, TREBLE, MIC and LINE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101023888A CN1307550C (en) | 2003-10-27 | 2003-10-27 | Method for united controlling sound channel of computer via intermediate hier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101023888A CN1307550C (en) | 2003-10-27 | 2003-10-27 | Method for united controlling sound channel of computer via intermediate hier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1612106A CN1612106A (en) | 2005-05-04 |
| CN1307550C true CN1307550C (en) | 2007-03-28 |
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| CNB2003101023888A Expired - Fee Related CN1307550C (en) | 2003-10-27 | 2003-10-27 | Method for united controlling sound channel of computer via intermediate hier |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002369154A (en) * | 2001-04-02 | 2002-12-20 | Matsushita Electric Ind Co Ltd | Image playback equipment for digital image contents, image playback method, image playback program, and package media |
| WO2003005190A1 (en) * | 2001-07-06 | 2003-01-16 | E-Genie Australia Pty Limited | Method and system for computer software application execution |
| CN1424684A (en) * | 2002-12-23 | 2003-06-18 | 南京大学 | Method and device for computer aided electroacoustic device power load test |
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- 2003-10-27 CN CNB2003101023888A patent/CN1307550C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002369154A (en) * | 2001-04-02 | 2002-12-20 | Matsushita Electric Ind Co Ltd | Image playback equipment for digital image contents, image playback method, image playback program, and package media |
| WO2003005190A1 (en) * | 2001-07-06 | 2003-01-16 | E-Genie Australia Pty Limited | Method and system for computer software application execution |
| CN1424684A (en) * | 2002-12-23 | 2003-06-18 | 南京大学 | Method and device for computer aided electroacoustic device power load test |
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| Publication number | Publication date |
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| CN1612106A (en) | 2005-05-04 |
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Granted publication date: 20070328 Termination date: 20101027 |