TWI234106B - Method for unified control of computer audio channel through intermediate layer - Google Patents

Abstract

This invention provides a method for unified control of computer voice channel through intermediate layer. It includes the following procedures: firstly, it initializes the status of sound card. Secondly, it selects the audio channel for the unified control, and builds a timer for the selected channel. Further, it assigns the recall function responding to the timer as the audio control interface for the reset application program. Furthermore, It monitors the status change for the audio channel of the operating system. Moreover, when the timer is expired, it resets the audio control interface of the application program based on the status of the system audio channel. It builds an intermediate layer between the operating system and the application program for the system audio control. Finally, the system keeps synchronously in the audio status with other application programs.

Description

1234106 g No. 92127853 Γ: Μ Xiao 丨 「一 g_ V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a method for controlling a computer audio channel ', especially to a method for unifying computer audio channels through an intermediate layer Method of control. [Previous Technology] At present, with the more and more mature multimedia technology, computers are gradually enhancing their entertainment, not only the video processing is getting smoother and smoother. In order to comply with this trend, in addition to the increasing emphasis on audio processing capabilities in computer operating systems, a large number of independent audio processing applications have also emerged accordingly. As far as the computer operating system is concerned, no matter under Wi n d o w s or Li n u X, the operating system provides an interface for controlling the sound size and left and right channels. However, many current applications often give users f some doubts when adjusting the sound state. A simple example: a user opens a music player and plays music. When he left, he set the system sound state to mute. When another user used the player on this computer, he did not know that someone had changed the system settings, he could not directly observe the change of the sound state from the player, so he found that although the playback was currently in the Playback status, but there is no sound from the computer speakers. The root cause of this phenomenon is that 'Although the sound state of the system has changed, other applications at this time cannot know the change in the sound state, which has caused the inconsistency between the sound state of the system and the sound control interface of the application. This has caused considerable confusion for many users. In addition, with the continuous enhancement of sound card functions, various channels provided by it are also increasing, such as: VOL, PCM, CD, BASS, TREBLE,

Page 5 1234106 / _Case No. 92127853: Rev. ~ JJD__ V. Description of the invention (2) Μ IC, LI NE, etc., and many channels have left and right balance, so the application is controlling these channels At the time, there was no unified Access interface available, especially under the LinnX operating system. If each application controls the sound device in its own way, it will not only bring a certain degree of development complexity, but may also cause the occupation conflict of the sound output device. [Summary of the Invention] The present invention provides a method for uniformly controlling a computer's audio channel through an intermediate layer in order to solve the above-mentioned problems, and realizes synchronization of sound states between an application program and a system. The invention provides a method for uniformly controlling computer audio channels through an intermediate layer. An intermediate layer is set between an operating system and an application program to uniformly control the state of an audio channel. The method includes the following steps: initializing the state of a sound card ; Select the audio channel to be controlled uniformly; set a timer for the selected channel; specify the Cal 1 back function of the response timer as the Refresh application audio control interface; monitor the operating system The state of the audio channel changes; the application audio control interface is reset according to the state of the system audio channel when the timer expires. The present invention can maintain the system and the system by setting an intermediate layer between the system sound control and each application. The sound status of other applications is synchronized. Using the present invention, the sound control method of the calling system can be unified, the sound control interface is simplified, and the automatic management of the sound status is realized. When switching the channel status, the sound value is saved for each application. The program saves the respective channel state and sound value, and also You can set the status and number of multiple channels at the same time

1234106 _ Case No. 92127853 | — £ > Qiaoyue Yue _1 Yue Correction __ 5. Description of the invention (3) Value. [Embodiment] The present invention provides a method for unified control of computer audio channels through an intermediate layer. An intermediate layer is set up between an operating system and an application program to uniformly control the state of the audio channel, as shown in FIG. 1, The method includes the following steps: initializing the state of the sound card (step 1 0 1); selecting the audio channel to be controlled uniformly (step 10 2); setting a timer for the selected channel (step 1 0 3); The callback function of the device is designated as the application audio control interface (step 104); monitoring the status change of the audio channel of the operating system (step 105); when the timer expires, it is reset according to the status of the system audio channel. Application audio control interface (step 106). As shown in Figure 2, the initialization step includes: turning on the sound card device, checking the sound card's support for each channel (step 2 1); judging the status of each channel, and recording the current sound value (step 2 0 2 ); Set the status and volume value of each channel (step 203). The above steps of setting the state of each channel may be to maintain the state of each channel. The status of each channel can be set to inactive, normal, left channel, right channel, and mute. These audio channels can include VOL, PCM, CD, BASS, TREBLE, MIC, LINE, etc. Before the status of the left and right channels is switched, the current left and right channel sound values can be automatically saved. When the channel status is switched back, the saved values can be automatically restored. The above steps for setting the volume value of each channel may be set to the last recorded value.

1234106 Case No. 92127853 is replacing Gong η Month m. Revision V. Description of the invention (4) The present invention sets up an intermediate layer between the system sound control and the application program. As shown in Figure 3, the sound control layer of the present invention is based on The shared library (Shar ed L bror i es) is used by various applications to call, and each application reads and writes the value and status of the specified sound channel by calling (Ca 1 1) one of its entities (Inst an ce). Interface. Please refer to FIG. 4, taking an audio player to control the PCM and MIC channels as an example to illustrate the implementation process of the present invention. First open the sound card device and check the sound card's support for each channel (step 4 1); determine the status of each channel and record the current sound value (step 4 2); maintain the status and volume value of each channel , Set the PCM channel status to normal, and set the volume to the last recorded value (step 403); register a timer with an interval of 1 second, and specify the sound channel to respond to the timer as the PCM channel. Designate the player sound control interface re-clear function (step 40 4); then monitor the system sound state for changes (step 40 5); if there is a change, then determine whether the changed channel is registered with a timer Channel (step 4 0 6); if it is the channel, call the registered callback function, and clear the control of the player interface volume control scroll, left and right channel balance bar, and mute options (Control) (step 4 0 7); If the system sound has not changed, or the changed sound channel is not the sound channel to which the timer is registered, then no action is taken. After a time interval of 1 second, ask whether the timer is stopped (step 408), if not stopped, then the system continues to monitor the change in sound, if the timer is stopped, then the process ends (step 409). The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention;

Page 8 1234106 y __ Case No. 92127853 March Day Amendment V. Description of the Invention (5) ... All the equivalent changes and modifications made within the scope of the invention are covered by the scope of the invention patent. 1234106 Heart _ Case No. 92127853 \-Qing V film month! Modification ___ Brief description of the diagram. Figure 1 is a flowchart of a method for uniformly controlling computer audio channels through an intermediate layer of the present invention. Figure 2 is a flowchart of an initialization process provided by the present invention. Figure 3 is a flowchart of the present invention. A schematic diagram of an application environment; and FIG. 4 is a flowchart of an embodiment of the present invention. [Illustration of Symbols] Step 1 0 1 Initialize the state of the sound card. Step 1 0 2 Select the audio channel to be controlled uniformly. Step 1 0 3 Set a timer for the selected channel.

Step 1 0 4 Specify the callback function of the response timer as the application audio control interface. Step 1 0 5 Monitor the status change of the audio channel of the operating system. Step 1 0 6 According to the status of the system audio channel when the timer expires. Re-clear the application audio control interface Step 2 0 1 Open the sound card device and check the sound card's support for each channel

Step 2 0 2 Determine the status of each channel and record the current sound value. Step 2 0 3 Set the status and volume value of each channel. Step 4 0 1 Turn on the sound card device and check the sound card's support for each channel. Step 4 0 2 Determine the status of each channel and record the current sound value. Step 4 0 3 Keep the status of each channel and the volume value, set the PCM channel status to normal, and set the volume to the last recorded value. Step 4 0 4 Register an interval as 1-second timer with response timer

1234106 / Case No. 92127853 'v. Two, two months, two days, amended diagram, simple description, the sound channel of the timer is the PCM channel, the callback function is designated as the player sound control interface, the re-clear function step 4 0 5 monitor the sound state of the system Is there a change? Step 4 0 6 Determine whether the changed channel is a channel with a timer registered. Step 4 7 Call the registered callback function and clear the volume control scroll, left and right channel balance bars, and mute of the player interface. Options and other controls Step 4 0 8 Ask whether the timer is stopped Step 4 0 9 End the process

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Claims (1)

1234106 Case No. 92127853 Amendment VI. Patent Application Scope 1. A method for unified control of computer audio channels through an intermediate layer. An intermediate layer is set up between the operating system and applications to uniformly control the state of the audio channel. The method includes the following steps: initializing the state of the sound card; selecting the audio channel to be controlled uniformly; setting a timer for the selected channel; specifying the callback function of the echo timer as Function (Reefresh) Application audio control interface; monitor the status change of the audio channel of the operating system; and _ timer to re-clear the application audio support interface based on the status of the system audio channel. ! The method for unified control of computer audio channels through the middle layer as described in item 1 of the scope of the patent application, wherein the initialization step includes: talking about a sound card device, and checking the sound card's support for each channel; + J breaks the state of each channel and records the current sound value; and k determines the state and volume value of each channel. _. The method for uniformly controlling computer audio communication through the middle layer as described in item 2 of the scope of patent application, wherein the step of setting the state of each channel can be to maintain the state of each channel. 4. The method for uniformly controlling the computer audio channel through the middle layer as described in item 2 of the scope of the patent application, wherein the step of setting the state of each channel can be set to invalid, normal, left channel, right channel, and Mute state. 5. The method for uniformly controlling the computer audio channel through the middle layer as described in item 4 of the scope of patent application, wherein before the state of the left channel and the right channel is switched Page 12 1234106 / Case No. 92127853 Year: j Day Amendment 6. Patent Application Range The current left and right channel sound values can be automatically saved. When the channel status is switched back, the saved values can be automatically restored. 6. The method for uniformly controlling the computer audio channel through the middle layer as described in item 2 of the scope of the patent application, wherein the step 5 of setting the volume value of each channel may be set to the last recorded value. 7. The method for unified control of computer audio channels through the middle layer as described in item 1 of the scope of patent application, wherein the time interval of the timer can be automatically set according to the time required to respond. 8. The method for uniformly controlling the computer audio channel through the middle layer as described in item 1 of the scope of the patent application, wherein the step of re-clearing the audio control interface of the application is the change in the audio state of the system reflected in the relevant control of the application ( Contro1). 9. The method for unified control of computer audio channels through the middle layer as described in item 1 of the scope of patent application, wherein the audio channels include V 0 L, PCM, CD, BASS, TREBLE, MIC and LINE. Page 13