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use glib::{object::IsA, translate::*};
use gst::prelude::*;

use crate::auto::AudioAggregatorPad;

mod sealed {
    pub trait Sealed {}
    impl<T: super::IsA<super::AudioAggregatorPad>> Sealed for T {}
}

pub trait AudioAggregatorPadExtManual: sealed::Sealed + IsA<AudioAggregatorPad> + 'static {
    fn audio_info(&self) -> Option<crate::AudioInfo> {
        unsafe {
            let ptr = self.as_ptr() as *mut ffi::GstAudioAggregatorPad;
            let _guard = self.as_ref().object_lock();

            let info = &(*ptr).info;

            if !info.finfo.is_null() && info.channels > 0 && info.rate > 0 && info.bpf > 0 {
                return None;
            }

            Some(from_glib_none(mut_override(
                info as *const ffi::GstAudioInfo,
            )))
        }
    }
}

impl<O: IsA<AudioAggregatorPad>> AudioAggregatorPadExtManual for O {}