d-avaudioengine-binding

Bindings for D for Apple's AVAudioEngine

This project uses the @ObjectiveC extern(C++) final style, which makes the project compatible with any D project.

This is part of the group of projects to D Apple Game Development:

• Metal
• Base Objective C Reflection

Note on Handling Objective-C Blocks (delegates)

• They were implemented by using @jacob-carlborg 's amazing clang_block, which made it compatible to use D delegates together with Objective-C blocks.
• Instead of passing D delegates, simply assign it to a variable:

import objc.runtime;
auto convFn = block((AVAudioPacketCount inNumberOfPackets, AVAudioConverterInputStatus* outStatus)
{
    if(temp.frameLength > 0)
    {
        *outStatus = AVAudioConverterInputStatus._HaveData;
        return cast(AVAudioBuffer)temp;
    }
    else
    {
        *outStatus = AVAudioConverterInputStatus._NoDataNow;
        return null;
    }
});

• After that, you will need to pass the address of this block to your target function:

converter.convertToBuffer(cast(AVAudioBuffer)buffer.avaudio, &err, &convFn);

• This is all that is needed

If you want to represent any type from Objective C in D, just write code.ns. ns will try to convert to a type representable in Objective C.

Generating the files

The files are a mix of automatic and manual work. Unfortunately I still don't keep comments inside the properties, classes and methods, so, no comments are available right now. Any contribution to get the comments in are welcomed. Simply execute node AVAudioEngine.h which will generate at source/avaudioengine.d.