TWI618390B - Gapless recording method on android system - Google Patents

Abstract

The present invention provides a gapless recording method suitable for an Android system. The Android system is installed in a smart device, and the smart device has a built-in microphone. The gapless recording method is used in a process of recording by a smart device, and the method includes: The driver of the smart device determines whether the smart device has been inserted into the external microphone; when the driver determines that the smart device has been inserted into the external microphone, the driver switches the audio path from the built-in microphone to the external microphone according to the control command delay; the smart device driver judges the smart Whether the device has been removed from the microphone; and when the driver determines that the smart device has been removed from the microphone, the driver immediately switches the audio path from the external microphone to the built-in microphone. Thereby, the effect of the gapless recording is achieved.

Description

Clear gap recording method for Android

The invention relates to a gapless recording method, and in particular to a gapless recording method suitable for an Android system.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a conventional Android (Android) system architecture control and management recording. A device that installs an Android system may be referred to as a smart device, such as a smart handheld device. Common smart handheld devices such as smartphones and tablets. The Android system is constructed by a framework 100, a hardware abstraction layer (HAL) 200, and a kernel layer (Kernel) 300. When applied to recording, the source of the audio AU may be a built-in microphone or an external microphone. When an external microphone is plugged and unplugged, it often causes a problem of interruption of recording.

In detail, according to the design of the Android system, when the driver 31 detects the signal inserted into the earphone microphone, the driver 31 notifies the system (the driver 31 notifies the audio hardware abstract layer (audio HAL) 21, and then the audio is hard. The body abstraction layer 21 notifies the audio manager 11) that an external microphone is inserted. After a period of hardware and software operation, the driver 31 receives the control command SS for switching the audio path of the system, and the driver 31 can then source the audio AU. Switch from the original built-in microphone to an external microphone. In short, when the external microphone is inserted into the smart device, the Android system generates a control command SS to control the driver 31 to switch the audio path from the built-in microphone to the external microphone after the delay of the operation. However, the audio path may have been switched to an external microphone before the external microphone is plugged in but not fully inserted. Therefore, the external microphone may not be recorded before the external microphone is fully inserted. In the opposite case, when the external microphone is unplugged, the driver 31 notifies the system that the system will notify each application first, and usually delays the operation of the system and adds a set delay time (such as one second delay). Thereafter, the control command SS is generated to notify the driver 31 to switch the audio path. However, during this period, because the external microphone has been pulled out, the system is delayed, because the source of the audio AU is still set to an external microphone, so the content of the audio AU will not be recorded.

The embodiment of the invention provides a gapless recording method suitable for the Android system, which can achieve the effect of no-gap recording regardless of whether the external microphone is plugged or unplugged.

An embodiment of the present invention provides a gapless recording method suitable for an Android system. The Android system is installed in a smart device, and the smart device has a built-in microphone, and the gapless recording method is used for a process of recording by a smart device. Including: the driver of the smart device determines whether the smart device has been inserted into the external microphone; when the driver determines that the smart device has been inserted into the external microphone, the driver switches the audio path from the built-in microphone to the external microphone according to the control command delay to ensure that the external microphone is completely The recording is started after the smart device is inserted; the driver of the smart device determines whether the smart device has been removed from the microphone; and when the driver determines that the smart device has been removed from the microphone, the driver immediately switches the audio path from the external microphone to the built-in microphone.

In summary, the embodiment of the present invention provides a gapless recording method suitable for an Android system, and the system can continuously record whether the external microphone is inserted or removed. When the user uses the Android system to record, the recorded audio content will not be interrupted due to the device that switches the recording. Therefore, there is no problem that the recording is interrupted and the important information is lost. In addition, with the gapless recording method, since the content of the recording is continuous without audio interruption, it is also possible to prevent the user from feeling uncomfortable due to the change of the sound interruption when the replayed recording is heard.

The detailed description of the present invention and the accompanying drawings are to be understood by the claims The scope is subject to any restrictions.

100‧‧‧Frame layer

11‧‧‧Optical Manager

200‧‧‧ hardware abstraction layer

21‧‧‧Audio hardware abstraction layer

300‧‧‧ core layer

31‧‧‧Driver

AU‧‧‧ audio

SS‧‧‧ control order

4‧‧‧Smart devices

5‧‧‧External microphone

INT‧‧‧ interrupt signal

Steps S110, S120, S130, S140, S510, S520, S530, S540, S550, S610, S620, S630, S640‧‧

FIG. 1 is a schematic diagram of a conventional Android system architecture control and management recording.

2 is a schematic diagram of an Android system architecture applied to control and manage recordings according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of a smart device and an external microphone according to an embodiment of the present invention.

FIG. 4 is a flowchart of a gapless recording method suitable for an Android system according to an embodiment of the present invention.

FIG. 5 is a flowchart of an application scenario of a gapless recording method suitable for an Android system for determining whether to insert an external microphone according to another embodiment of the present invention.

FIG. 6 is a flowchart of an application situation of a gapless recording method suitable for an Android system for determining whether to remove an external microphone according to another embodiment of the present invention.

[Embodiment for a gapless recording method for Android]

Please refer to FIG. 2. FIG. 2 is a schematic diagram of an Android system architecture applied to control and manage recordings according to an embodiment of the present invention. A gapless recording method suitable for Android systems, the Android system being installed on a smart device having a built-in microphone. The smart device is, for example, a smart handheld device such as a smart phone or a tablet, but the invention is not limited thereby. Please refer to FIG. 3 together. FIG. 3 is a schematic diagram of an intelligent device and an external microphone according to an embodiment of the present invention. When the gapless recording method of the present embodiment is applied to the smart device 4 using the Android system, the smart device 4 is a smart handheld device such as a smart phone. The external microphone 5 is, for example, an ear microphone, but the present invention is not limited thereto. The invention is also not limited to the type of external microphone.

The Android system includes a framework 100, a hardware abstraction layer (HAL) 200, and a kernel layer (Kernel) 300. For the function of recording, the frame layer 100 has an audio manager 11, the abstraction layer 200 has an audio hardware abstraction layer 21, and the core layer 300 has a driver 31. The driver located in the core layer 300 receives the audio AU of the microphone device, and the source of the audio AU is determined according to the microphone device used for switching. The microphone device includes a built-in microphone and an external microphone 5, and the built-in microphone of the smart device 4 is not shown in FIG. 3 because the built-in microphone is usually a hidden design. The plugging and unplugging of the external microphone 5 causes a change in the electrical state of the audio connecting terminal, and the electrical state of the audio connecting terminal is not the same when the external microphone 5 is inserted and when the external microphone 5 is inserted. The audio connection terminal is electrically connected to the driver 31, so that the driver 31 obtains an interrupt INT. According to the content of the interrupt signal driver 31, the external microphone 5 is inserted or removed. The driver 31 can determine and switch the audio path according to the interrupt signal INT. The driver 31 passes the audio AU to the audio hardware abstraction layer 21 located at the hardware abstraction layer 200, and then to the audio manager 11 located at the frame layer 100. In addition, when the driver 31 determines that the smart device 4 has inserted or removed the microphone 5, the driver 31 notifies the audio manager 11 of the audio device change, and the driver 31 can also switch according to the control command SS from the audio hardware abstraction layer 21. Audio path. The audio manager 11 generates a transfer control command SS to the audio hardware abstraction layer 21, and then transmits it to the driver 31 to thereby control the driver 31 to switch the audio path. Briefly, the audio manager 11 can be used to control the driver 31 to switch the audio path via the audio hardware abstraction layer 21, and to receive and record the audio transmitted via the audio path. However, with the gapless recording method of the present embodiment, when the external microphone 5 is inserted into the smart device 4, the driver 31 delays switching the audio path, and when the external microphone (5) is removed, the driver 31 does not have to wait for control from the upper layer. Command the SS and immediately switch the audio path. For the detailed implementation, please refer to the following instructions.

Please refer to FIG. 2 and FIG. 4 simultaneously. FIG. 4 is a flowchart of a gapless recording method suitable for an Android system according to an embodiment of the present invention. The gapless recording method is used for wisdom The process of recording the device, the method includes the following steps. In step S110, the driver 31 of the smart device located at the core layer 300 determines whether the smart device has been inserted into the external microphone. When the driver 31 determines that the smart device has been inserted into the external microphone, proceeding to step S120, the driver 31 switches the audio path from the built-in microphone to the external microphone according to the control command delay. The control command is the control command SS from the audio manager 11 of FIG. 2 and communicated by the audio hardware abstraction layer 21. The delay of the driver 31 is set to wait for the external microphone to be fully inserted into the smart device, but the present invention does not limit the delay time of the driver 31, which can be adjusted according to design requirements. Through the appropriate delay of the driver, when the external microphone is inserted (that is, the interrupt signal INT is received), the system maintains the recording with the built-in microphone until the external microphone is fully inserted, without the interruption of the recording, and After the external microphone is fully inserted, the external microphone is used for recording. In addition, when the driver 31 determines in step S110 that the smart device is not plugged into the external microphone, step S110 is repeated to continue the determination.

After step S120, proceeding to step S130, the driver 31 of the smart device determines whether the smart device has been detached from the microphone. When the driver 31 determines that the smart device has been detached from the microphone, the process proceeds to step S140, and the driver 31 immediately switches the audio path from the external microphone to the built-in microphone. On the other hand, when the driver 31 determines that the smart device has not been removed from the microphone, step S130 is repeated to continue the determination. In detail, in step S130, when the driver detects the interrupt signal INT generated when the external microphone is removed, the driver 31 notifies the upper layer of the system (the frame layer 100 and the hardware abstraction layer 200), that is, the driver 31 notifies The audio manager 11 audio device changes, but also immediately switches the audio path from the external microphone to the built-in microphone. Based on the architecture of the Android system, in addition to the system operation time, after about 1~2 seconds, the audio manager 11 of the upper layer of the system generates a control command SS to notify the driver 31 to switch the audio path. However, before the driver 31 receives the control command SS, the driver 31 has first switched the audio path to the built-in microphone to avoid interruption of the recording. In addition, when the driver 31 receives the audio manager 11 After the control command SS, the parameters of the audio can also be adjusted according to the control command SS, such as adjusting the strength or sound quality of the audio. In this way, fine tuning of the audio can be done. Therefore, when the external microphone is pulled out by the smart device, the switching of the audio path by the driver 31 is not delayed by waiting for the control command SS of the upper layer of the system (including the system operation delay and the delay of 1 to 2 seconds). This caused the recording to be interrupted. According to the above, the driver 31 of the embodiment can immediately switch the audio path according to the interrupt signal INT extracted by the external microphone, that is, the audio command is not required to be switched through the control command SS of the audio manager 11 and the audio hardware abstraction layer 21 of FIG. path. Therefore, when the external microphone is removed, the audio path is immediately switched to the built-in microphone, so that the sound recorded during the external microphone removal is not interrupted.

It is to be noted that the step S110 in the process of FIG. 4 is used to determine whether the external microphone has been inserted, and the step S130 is used to determine whether the external microphone has been removed. In actual application, the order of steps S110 and S130 is not limited. . When there is no external microphone, the driver 31 of the smart device can repeatedly perform step S110 to continuously determine whether an external microphone is inserted. When the smart device has inserted the external microphone, the driver 31 can repeatedly perform step S130 to continuously determine whether the external microphone is removed. The flow diagram of FIG. 4 is used to illustrate the main spirit of the flow of steps of the present invention, and the present invention does not thus limit the order of use and timing of execution of steps S110 and S130. Based on the flow architecture of FIG. 4, two embodiments are separately provided for the external microphone insertion and the external microphone extraction, respectively, to provide two embodiments to help illustrate.

Please refer to FIG. 2 and FIG. 5 simultaneously. FIG. 5 is a flow chart of an application situation of the gapless recording method for the Android system in determining whether to insert an external microphone according to another embodiment of the present invention. In step S510, the driver 31 determines whether the interrupt signal INT is received. If the interrupt signal INT is received and the interrupt signal is confirmed to indicate that the external microphone has been inserted, step S520 is performed to notify the (upper layer) audio device of the system to change, that is, notify the hardware abstraction layer 21 and then notify the audio via the hardware abstraction layer 21. Manager 11. Next, proceeding to step S530, determining whether the upper layer of the system is The notification switches the audio path to an external microphone. If the system wants to notify the driver to switch the audio path to the external microphone, proceed to step S540, the driver delays switching, and then proceeds to step S550, the driver switches the audio path to the external microphone. The driver delay of step S540 is set to wait for the external microphone to be fully inserted into the smart device, which can be adjusted according to design requirements, and the present invention does not limit the length of time for the driver to delay. The driver delays switching. The purpose is to insert the external microphone (ie, receive the interrupt signal INT). Before the external microphone is fully inserted, the system maintains the recording with the built-in microphone, and the external microphone is completely inserted. The microphone is used for recording.

Next, please refer to FIG. 2 and FIG. 6 at the same time. FIG. 6 is a flowchart of an application situation of the gapless recording method suitable for the Android system in determining whether to remove the mic microphone according to another embodiment of the present invention. In step S610, the driver 31 determines whether the interrupt signal INT is received. If the interrupt signal INT is received and the interrupt signal is confirmed to indicate that the external microphone has been removed, then in step S620, the driver 31 notifies the system of the audio manager 11 of the audio device to change, and immediately switches the audio path to the built-in microphone. Next, proceeding to step S630, it is determined whether or not the upper layer of the system is notified to switch to the built-in microphone. If the system notifies that it is to switch to the built-in microphone, the audio manager 11 transmits the control command SS to the driver 31, and then proceeds to step S640. However, before the driver 31 receives the control command SS transmitted by the audio manager 11, the driver 31 has switched the audio path to the built-in microphone in step S620 so that the recorded sound is not interrupted. In step S640, the audio parameters, such as the intensity or sound quality of the audio, etc., may be adjusted according to the control command SS. In detail, the control command SS transmitted by the audio manager 11 may include a command for causing the driver 31 to adjust the parameters of the audio. However, the present invention does not limit the content and format of the control commands for adjusting the audio.

It can be clearly seen from the two embodiments of FIG. 5 and FIG. 6 that the driver 31 of the gapless recording method of the present embodiment delays switching the audio path when the external microphone is inserted to wait for the external microphone to be fully inserted, and when the external microphone is removed. No need to wait The upper layer control command SS can switch the audio path first. The driver 31 can also adjust the audio parameters according to the upper layer control commands.

[Possible effects of the examples]

In summary, the seamless recording method for the Android system provided by the embodiment of the present invention allows the Android system to continuously record whether the external microphone is inserted or removed. Because the driver delays switching the audio path when the external microphone is inserted to wait for the external microphone to be fully inserted, and does not need to wait for the command of the upper layer of the system to switch the audio path when the external microphone is removed, so that the user does not use the Android system for recording, The recorded audio content is interrupted by the device that switches the recording (external microphone or built-in microphone), thereby achieving full recording. Therefore, there is no problem that the recording is interrupted and the important information is lost. In addition, with the gapless recording method, since the content of the recording is continuous without audio interruption, it is also possible to prevent the user from feeling uncomfortable due to a change in the sound interruption when the replayed recording is heard.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the invention.

Claims (10)

A gapless recording method suitable for the Android system, the Android system is installed in a smart device, the smart device has a built-in microphone, and the gapless recording method is used in the process of recording the smart device with the built-in microphone, the gapless process The recording method includes: a driver of the smart device determines whether the smart device has inserted an external microphone; and when the driver determines that the smart device has been inserted into the external microphone, the driver delays an audio path according to a control command Switching to the external microphone by the built-in microphone, wherein the delay is a waiting time for the external microphone to be fully inserted into the smart device, so that the external microphone is inserted, and the external microphone is maintained until the external microphone is fully inserted. The built-in microphone is used for recording, and the external microphone is used for recording after the external microphone is fully inserted. The gapless recording method for the Android system according to Item 1 of the claim, further comprising: the driver of the smart device determining whether the smart device has been detached from the external microphone; and when the driver determines that the smart device has When the external microphone is removed, the driver immediately switches the audio path from the external microphone to the built-in microphone. The gapless recording method for Android system according to Item 1 of the claim, wherein the control command is generated by an audio manager and transmitted to the driver via an audio hardware abstraction layer. The gapless recording method for Android system according to Item 3 of the claim, wherein the audio manager is located at a frame layer of the Android system. The gapless recording method for Android system according to Item 3 of the claim, wherein the audio hardware abstraction layer is located in a hardware abstraction layer of the Android system. According to the claim 1, the seamless recording method for Android system includes: When the driver determines that the smart device has been inserted into the external microphone, the driver notifies an audio manager of the audio device to change. According to the second aspect of the present invention, the gapless recording method for the Android system further includes: when the driver determines that the smart device has removed the external microphone, the driver notifies an audio manager of the audio device to change. According to the gapless recording method for Android system described in Item 7 of the claim, after the driver determines that the smart device has removed the external microphone, the driver notifies the audio manager of the change of the audio device. The method further includes: the audio manager transmitting the control command to the driver to adjust parameters of the audio. The gapless recording method for Android system according to Item 1 of the claim, wherein the external microphone is a headphone microphone. The gapless recording method for Android system according to Item 1 of the claim, wherein the smart device is a smart handheld device.