Can audacity work in real-time?

[张博-2]

I want to make audacity work in real-time, when playing, the edit function such as "Cut","Copy" ,"Effect" and so on can work.

But I don't know whether it is possible.

Everybody who knows something about it,can you do me a favor?

Thanks ~ 

                ZhangBo

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[Michael Chinen]

2008/7/2 张博 <wandercloud@...>:
> I want to make audacity work in real-time, when playing, the edit function
> such as "Cut","Copy" ,"Effect" and so on can work.
>
> But I don't know whether it is possible.
It's definitely possible.  It might be useful to some users, but I
tend to pause before I edit.  The downside is that the behavior of
playing when the playing region and effect area overlap will be
non-deterministic unless you make it mutex, which makes it essentially
non-realtime again.

You will basically need to add mutexes to the every piece of code that
edits the waveclip/sequence/blockfile.  You can look at src/ondemand,
Sequence, and BlockFile if you want some examples.

Michael

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[张博-2]

>Subject: Re: [Audacity-devel] Can audacity work in real-time?
>> I want to make audacity work in real-time, when playing, the edit function
>> such as "Cut","Copy" ,"Effect" and so on can work.
>>
>> But I don't know whether it is possible.
>It's definitely possible.  It might be useful to some users, but I
>tend to pause before I edit.  The downside is that the behavior of
>playing when the playing region and effect area overlap will be
>non-deterministic unless you make it mutex, which makes it essentially
>non-realtime again.
>
>You will basically need to add mutexes to the every piece of code that
>edits the waveclip/sequence/blockfile.  You can look at src/ondemand,
>Sequence, and BlockFile if you want some examples.
>
>Michael
>

 

Hi Micheal, Thanks for your replying.

 

what does“You can look at src/ondemand,Sequence, and BlockFile if you want some examples.” mean？ Is "src/ondemand" a source file or a document?,and where is it?

 

I have known about sequence,and blockfile. Because of BlockFile , when Editing, It will make some temp files named *.auf. That's to say, both reading and writing data are from disk, which definitely  can affect the real-time.

The smaller the maxBlockSize is , the more the amount of temp files are.

The bigger  the maxBlockSize is , the worse the real-time is.

How much the maxBlockSize is proper?

 

Another question, The useage of temp files is to support Undo and Redo.

Doesn't it conflict with real-time? 

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