libobs-wrapper 9.0.4+32.0.2

A safe wrapper around libobs
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use libobs::obs_scene_t;

use crate::{impl_obs_drop, runtime::ObsRuntime, unsafe_send::Sendable, utils::ObsDropGuard};
use std::ptr;

#[derive(Debug)]
pub(super) struct _SceneDropGuard {
    scene: Sendable<*mut obs_scene_t>,
    runtime: ObsRuntime,
}

impl _SceneDropGuard {
    pub(super) fn new(scene: Sendable<*mut obs_scene_t>, runtime: ObsRuntime) -> Self {
        Self { scene, runtime }
    }
}

impl ObsDropGuard for _SceneDropGuard {}

impl_obs_drop!(_SceneDropGuard, (scene), move || {
    let scene_source = unsafe {
        // Safety: We know the scene pointer is
        libobs::obs_scene_get_source(scene.0)
    };

    for i in 0..libobs::MAX_CHANNELS {
        let current_source = unsafe {
            // Safety: We are in the runtime and the pointer is valid because of the drop guard
            libobs::obs_get_output_source(i)
        };
        if current_source == scene_source {
            unsafe {
                // Safety: Removing references to our pointer from the scene
                libobs::obs_set_output_source(i, ptr::null_mut());
            }
        }

        unsafe {
            // Safety: We are in the runtime and the pointer is valid because of the drop guard
            libobs::obs_source_release(current_source);
        }
    }

    unsafe {
        // Safety: We are in the runtime and the pointer is valid because of the drop guard
        libobs::obs_source_release(scene_source);
        libobs::obs_scene_release(scene.0);
    }
});