CN109994132A - A kind of method of real-time recording audio data in MAC operation system - Google Patents
A kind of method of real-time recording audio data in MAC operation system Download PDFInfo
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- CN109994132A CN109994132A CN201910296909.9A CN201910296909A CN109994132A CN 109994132 A CN109994132 A CN 109994132A CN 201910296909 A CN201910296909 A CN 201910296909A CN 109994132 A CN109994132 A CN 109994132A
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/10537—Audio or video recording
- G11B2020/10546—Audio or video recording specifically adapted for audio data
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- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
The invention discloses a kind of method of real-time recording audio data in MAC operation system, step includes: the image module list for obtaining system audio process and loading, and therefrom navigates to the target image module of entitled coreaudiod；The symbol invocation list stored in the form of array of pointers is obtained by the header addresses of the target image module；The direction address of scheduled symbolic pointer in the symbol invocation list is modified, to realize the binding again called to the corresponding symbol of the symbolic pointer, to complete the real-time monitoring changed to audio data and acquisition.The method of real-time recording audio data in MAC operation system of the present invention, can intercept in real time the change of system audio data, and not need to be shown and switched in system audio equipment, very easy to use.
Description
Technical field
The present invention relates to a kind of a kind of methods of real-time recording audio data in method more particularly to MAC operation system.
Background technique
MAC operation system is and stringenter to system operatio jurisdictions mandate because be the system for closing source completely, therefore needle
It is larger to the capture difficulty of system audio data.
Currently, very deficient to the recording technology of system audio data in the market, relatively effective mode is to be by registration
The mode of system audio process card module (also referred to as virtual sound card) captures audio.
Such mode can solve the problem of recording system audio data to a certain extent, but equally there is also larger
Defect: on the one hand, which realize plug-in unit can not get audio data in real time, there are larger delays；On the other hand,
Need user that must specify to virtual sound card equipment in audio frequency apparatus manager, it is very inconvenient to operate.
Summary of the invention
The present invention is directed to the drawbacks of prior art, provides a kind of method of real-time recording audio data in MAC operation system.
The method of real-time recording audio data, step include: in MAC operation system of the present invention
The image module list that system audio process loads is obtained, the target of entitled coreaudiod is therefrom navigated to
Image module；
The symbol invocation list stored in the form of array of pointers is obtained by the header addresses of the target image module；
The direction address of scheduled symbolic pointer in the symbol invocation list is modified, it is corresponding to the symbolic pointer to realize
Symbol call binding again, thus complete to audio data changes it is real-time monitor and obtain.
In MAC operation system of the present invention in the method for real-time recording audio data, accessed audio is traversed
Data flow simultaneously caches, and is then sent by network SOCKET.
In MAC operation system of the present invention in the method for real-time recording audio data, to the audio number of acquisition
It is created and is cached according to ID according to stream.
In MAC operation system of the present invention in the method for real-time recording audio data, if the voice data stream obtained
For multichannel, the road Ze Jiangge voice data stream caches after carrying out audio mixing.
In MAC operation system of the present invention in the method for real-time recording audio data, at set time intervals will
The audio data of caching exports.
In MAC operation system of the present invention in the method for real-time recording audio data, if buffer area does not have audio number
According to then exporting content is empty audio data.
In MAC operation system of the present invention in the method for real-time recording audio data, further comprises: will acquire
Microphone audio data export after target audio data with the voice data stream audio mixing.
In MAC operation system of the present invention in the method for real-time recording audio data, by the target audio of PCM format
Data are converted to AAC format, and calling system api interface is exported.
The method of real-time recording audio data, can intercept system in real time in MAC operation system of the present invention
The change of audio data, and do not need to be shown and switched in system audio equipment, it is very easy to use.
Detailed description of the invention
Fig. 1 is the flow diagram of the method for real-time recording audio data in MAC operation system of the present invention.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
As shown in Figure 1, in MAC operation system of the present invention real-time recording audio data method, can be by MAC
Executable code module is injected to realize in the memory of system operation process, which does not need to carry out in system audio equipment
Display and switching.For example, by copy system audio plug module to default audio plug catalogue, starting system audio of laying equal stress on into
Journey.In system plays audio, it is real that system process calls the code snippet for executing injection to specified memory address entrance
Existing operation intercepting, to obtain original PCM audio data.
Specifically, include the following steps:
The image module list that system audio process loads is obtained, the target of entitled coreaudiod is therefrom navigated to
Image module.
In this step, the image module list that system audio process loads can be obtained by system API.Then, traversal is every
A image module, to obtain the title of each image module；Then, name can be navigated to by the title of image module
The image module of referred to as coreaudiod, namely navigate to target image module.
Further, the symbol stored in the form of array of pointers is obtained by the header addresses of the target image module
Invocation list.
In this step, the header address information of the target image module can be determined by its call number information.It is obtaining
Can further be got after the header addresses of the target image module target image module _ _ DATA data bin data,
And should _ _ DATA data bin data in contain all symbol invocation lists of the target image module, and the symbol calls
List is stored in the form of array of pointers.
Then, further, by modifying the direction address of scheduled symbolic pointer in the symbol invocation list, with reality
The binding again that now the corresponding symbol of the symbolic pointer is called, so that completes to change audio data monitors and obtain in real time
It takes.That is, can be realized after the direction address of preset symbolic pointer is modified to the corresponding symbol of the symbolic pointer
Number call binding again, to achieve the purpose that interception system audio data.Preset symbolic pointer described here
Refer to the module to the call address of system function, system can be entered when playing sound by audio frequency apparatus
Gone in coreaudiod process execute undertake in system function corresponding to audio frequency apparatus control function, such as sound broadcasting and
It stops operation, and the executions address that these system functions call is exactly current symbolic pointer list acquired in us, is passed through again
New binding, can customized acquisition implementation procedure, achieve the purpose that intercepting and capturing.
In MAC operation system of the present invention in the method for real-time recording audio data, accessed audio is traversed
Data flow simultaneously caches, and is then sent by network SOCKET, in case down-stream uses.It, can when specifically being cached
The voice data stream of acquisition is created according to ID and is cached；Alternatively, if the voice data stream obtained is multichannel, the road Ze Jiangge audio number
It is cached after carrying out audio mixing according to stream.Then, the audio data of caching is exported at set time intervals.There is no sound for buffer area
Frequency according to when the case where, exportable content is empty audio data.
Further, the method for real-time recording audio data may also include that and will obtain in MAC operation system of the present invention
The microphone audio data taken export after target audio data with the voice data stream audio mixing.That is, institute of the present invention
Method is stated in addition to it can system audio data be obtained and be exported in real time, it can also be simultaneously to externally input microphone audio
Data carry out audio mixing output, that is, the microphone audio data that will acquire and the voice data stream audio mixing as after target audio data
It is exported again.In concrete operations, the target audio data of PCM format can be converted to AAC format, and calling system API connects
Mouth is exported.
The method of real-time recording audio data, can intercept system in real time in MAC operation system of the present invention
The change of audio data, and do not need to be shown and switched in system audio equipment, it is very easy to use.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (8)
1. a kind of method of real-time recording audio data in MAC operation system, which is characterized in that step includes:
The image module list that system audio process loads is obtained, the target image of entitled coreaudiod is therefrom navigated to
Module；
The symbol invocation list stored in the form of array of pointers is obtained by the header addresses of the target image module；
The direction address of scheduled symbolic pointer in the symbol invocation list is modified, to realize to the corresponding symbol of the symbolic pointer
Number call binding again, thus complete to audio data changes it is real-time monitor and obtain.
2. the method for real-time recording audio data in MAC operation system as described in claim 1, which is characterized in that traversal institute
The voice data stream and caching got, is then sent by network SOCKET.
3. the method for real-time recording audio data in MAC operation system as claimed in claim 2, which is characterized in that acquisition
The voice data stream according to ID create cache.
4. the method for real-time recording audio data in MAC operation system as claimed in claim 2, which is characterized in that if obtaining
Voice data stream be multichannel, the road Ze Jiangge voice data stream carry out audio mixing after cache.
5. the method for real-time recording audio data in MAC operation system as described in claim 3 or 4, which is characterized in that set
Fixed time interval exports the audio data of caching.
6. the method for real-time recording audio data in MAC operation system as claimed in claim 5, which is characterized in that if caching
Area does not have audio data, then exporting content is empty audio data.
7. the method for real-time recording audio data in MAC operation system as claimed in claim 2, which is characterized in that further
It include: the microphone audio data that will acquire with the voice data stream audio mixing is to export after target audio data.
8. the method for real-time recording audio data in MAC operation system as claimed in claim 7, which is characterized in that by PCM lattice
The target audio data of formula are converted to AAC format, and calling system api interface is exported.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910296909.9A CN109994132A (en) | 2019-04-15 | 2019-04-15 | A kind of method of real-time recording audio data in MAC operation system |
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| CN201910296909.9A CN109994132A (en) | 2019-04-15 | 2019-04-15 | A kind of method of real-time recording audio data in MAC operation system |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014017964A2 (en) * | 2012-07-27 | 2014-01-30 | Magine Holding AB | A system and a method adapted to display epg media content from the world wide web |
| CN103701854A (en) * | 2013-11-29 | 2014-04-02 | 深圳清华大学研究院 | Network real-time audio transmission method based on application virtualization |
-
2019
- 2019-04-15 CN CN201910296909.9A patent/CN109994132A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014017964A2 (en) * | 2012-07-27 | 2014-01-30 | Magine Holding AB | A system and a method adapted to display epg media content from the world wide web |
| CN103701854A (en) * | 2013-11-29 | 2014-04-02 | 深圳清华大学研究院 | Network real-time audio transmission method based on application virtualization |
Non-Patent Citations (2)
| Title |
|---|
| GAIA: "Windows下Core Audio APIS 音频应用开发（一）", 《CSDN》 * |
| 吾身三醒: "iOS语音开发--Core Audio", 《CSDN》 * |
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Application publication date: 20190709 |