Using Low Level Audio

SGaist

Then a bit more of advanced audio processing, in that case Qt is not the best tool for the "editing" part. You can use a library like DSPFilters for the audio processing.

QAudioOutput is used to send data to an audio device, so basically what you will have processed.

wwolff

Well, the things start to work, but if i understand correctly , and looking at the back-end list i will only be able to decode audio in windows?

SGaist

What do you mean by "only decode" ?

wwolff

On Windows machines.

SGaist

I understood that you are working on Windows what I would like you to explain is what you mean by "only decode" ?

wwolff

Ha! Ok,

Becouse looking at the table , for example the decode funtionality is not present, so in android machines for example, i will be able to use the QAudioDecoder class to open my audio and process it?

i only see this funtionality avaliable for :
Media Foundation (Windows) and GStreamer (Unix)

SGaist

Are you talking about audio files ?

wwolff

yep!

Basically i want load a wave or mp3 file, store it in a buffer and during the play...apply some filters in real-time to hear the results...
Everything is working using the QAudioOutput and QAudioDecoder examples, but my concern now is about how many platforms i will be able to make this run.
My engine runs in many platforms(Windows,Mac,Android,iOS) acctually using Qt , and the Audio component is the only component that are using yet external sdk to work properly and i want remove this sdk to make possible use only the low level part of Qt , as i do with graphics(OpenGL).

SGaist

Ok, clearer now.

Well, as you already discovered, the QAudioDecoder class is not yet available on all platforms so you have to rely on that other SDK currently to provide that part.

By the way; which one are you using right now ?

wwolff

Im using FMod, but i want a library where i can compile it toguether with my engine on the target plattform.
The only plattform that make this possible was the YSE sdk , but i not test it yet...

wwolff

Another idea about this topic that happen is becouse the main development hosts platforms(Windows and Linux) the decoder works...i will develop a little aplication to manage my own format of sound and images.
So, thia application basically will convert all the images and sound in a already prepeared buffer (in a buffer defined by me) to be loaded in the engine...
I believe in thia way i can then code my own decoder and use the low level QAudioOutput class to play it!

SGaist

IIRC, there are already some application mixing Qt and SFML that might be also an in-between solution.