Make PortSpec be chosen at runtime

[Javyre]

No description provided.

[Javyre]

The bit that is driving me insane:
https://github.com/Snowlabs/Jamyx/blob/develop/src/jamyxer.rs#L31

[Javyre]

Related issue:
RustAudio/rust-jack#73

[Javyre]

I know that the Box thing doesnt work, and I understand why.
But this is just one of my many attempts at making the spec chosen at runtime

[Javyre]

I fixed it... kind of...
This isnt what i wanted but it seems to be the only solution.
There is a lot of code repetition. Im basically writing the same function twice and this is really bad

[Javyre]

🎉 🎉 🎉 🎉 🎉 🎉 🎉 🎉 🎉 🎉 🎉
found an elegant solution!

#[derive(Clone, Copy)]
enum AnySpec {
    AudioOut,
    AudioIn,
}

unsafe impl j::PortSpec for AnySpec {
    fn jack_port_type(&self) -> &str {
        match self {
            &AnySpec::AudioIn => {
                static ispec: j::AudioInSpec = j::AudioInSpec;
                ispec.jack_port_type()
            },
            &AnySpec::AudioOut => {
                static ospec: j::AudioOutSpec = j::AudioOutSpec;
                ospec.jack_port_type()
            },
        }
    }

    fn jack_flags(&self) -> j::PortFlags {
        match self {
            &AnySpec::AudioIn => j::AudioInSpec.jack_flags(),
            &AnySpec::AudioOut => j::AudioOutSpec.jack_flags(),
        }
    }

    fn jack_buffer_size(&self) -> libc::c_ulong {
        match self {
            &AnySpec::AudioIn => j::AudioInSpec.jack_buffer_size(),
            &AnySpec::AudioOut => j::AudioOutSpec.jack_buffer_size(),
        }
    }
}

[Javyre]

Preparing commit...