aviutl2 0.9.3

pub use anyhow::Result as AnyResult;
use zerocopy::{Immutable, IntoBytes};

pub use half::{self, f16};
pub use num_rational::{self, Rational32};
pub use raw_window_handle::{self, Win32WindowHandle};

/// AviUtl2の情報。
#[derive(Debug, Clone)]
pub struct AviUtl2Info {
    /// AviUtl2のバージョン。
    pub version: AviUtl2Version,
}

/// AviUtl2のバージョン。
///
/// # Note
///
/// バージョン番号の形式は公式に定義されていないため、暫定的に以下のように解釈しています。
/// ```text
/// 2001500
/// || | |
/// || | +-- ビルドバージョン
/// || +---- ベータバージョン
/// |+------ マイナーバージョン
/// +------- メジャーバージョン
/// ```
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
pub struct AviUtl2Version(pub u32);
impl From<u32> for AviUtl2Version {
    fn from(value: u32) -> Self {
        Self(value)
    }
}
impl From<AviUtl2Version> for u32 {
    fn from(value: AviUtl2Version) -> Self {
        value.0
    }
}
impl AviUtl2Version {
    /// 新しいバージョンを作成します。
    pub fn new(major: u32, minor: u32, patch: u32, build: u32) -> Self {
        Self(major * 1000000 + minor * 10000 + patch * 100 + build)
    }

    /// メジャーバージョンを取得します。
    pub fn major(self) -> u32 {
        self.0 / 1000000
    }

    /// マイナーバージョンを取得します。
    pub fn minor(self) -> u32 {
        (self.0 / 10000) % 100
    }

    /// ベータバージョンを取得します。
    pub fn patch(self) -> u32 {
        (self.0 / 100) % 100
    }

    /// ビルドバージョンを取得します。
    pub fn build(self) -> u32 {
        self.0 % 100
    }
}

/// ファイル選択ダイアログのフィルタを表す構造体。
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct FileFilter {
    /// フィルタの名前。
    pub name: String,
    /// フィルタが適用される拡張子のリスト。
    pub extensions: Vec<String>,
}

/// [`Vec<FileFilter>`]を簡単に作成するためのマクロ。
///
/// # Example
///
/// ```rust
/// let filters = aviutl2::file_filters! {
///     "Image Files" => ["png", "jpg"],
///     "All Files" => []
/// };
/// ```
#[macro_export]
macro_rules! file_filters {
    ($($name:expr => [$($ext:expr),* $(,)?] ),* $(,)?) => {
        vec![
            $(
                $crate::FileFilter {
                    name: $name.to_string(),
                    extensions: vec![$($ext.to_string()),*],
                }
            ),*
        ]
    };
}

/// YC48のピクセルフォーマットを表す構造体。
///
/// # See Also
/// <https://makiuchi-d.github.io/mksoft/doc/aviutlyc.html>
#[derive(Debug, Clone, Copy, PartialEq, Eq, IntoBytes, Immutable)]
#[repr(C)]
pub struct Yc48 {
    /// Y成分の値。
    /// 0から4096までの値を取ります。
    pub y: i16,
    /// Cb成分の値。
    /// -2048から2048までの値を取ります。
    pub cb: i16,
    /// Cr成分の値。
    /// -2048から2048までの値を取ります。
    pub cr: i16,
}
impl Yc48 {
    /// YUV 4:2:2（YUY2）からYC48に変換します。
    pub fn from_yuy2(yuy2: (u8, u8, u8, u8)) -> (Self, Self) {
        let (y1, u, y2, v) = yuy2;
        let ny1 = ((y1 as u16 * 1197) >> 6) - 299;
        let ny2 = ((y2 as u16 * 1197) >> 6) - 299;
        let ncb = ((u as u16 - 128) * 4681 + 164) >> 8;
        let ncr = ((v as u16 - 128) * 4681 + 164) >> 8;
        (
            Self {
                y: ny1 as i16,
                cb: ncb as i16,
                cr: ncr as i16,
            },
            Self {
                y: ((ny1 + ny2) >> 1) as i16,
                cb: ncb as i16,
                cr: ncr as i16,
            },
        )
    }

    /// YC48からYUV 4:2:2（YUY2）に変換します。
    pub fn to_yuy2(self, other: Yc48) -> (u8, u8, u8, u8) {
        let y1 = ((self.y * 219 + 383) >> 12) + 16;
        let y2 = ((other.y * 219 + 383) >> 12) + 16;
        let u = (((self.cb + 2048) * 7 + 66) >> 7) + 16;
        let v = (((self.cr + 2048) * 7 + 66) >> 7) + 16;
        let y1 = y1.min(255) as u8;
        let y2 = y2.min(255) as u8;
        let u = u.min(255) as u8;
        let v = v.min(255) as u8;
        (y1, u, y2, v)
    }

    /// RGBからYC48に変換します。
    pub fn from_rgb(self, rgb: (u8, u8, u8)) -> Self {
        let (r, g, b) = rgb;
        let r = i16::from(r);
        let g = i16::from(g);
        let b = i16::from(b);
        let y = ((4918 * r + 354) >> 10) + ((9655 * g + 585) >> 10) + ((1875 * b + 523) >> 10);
        let cb = ((-2775 * r + 240) >> 10) + ((-5449 * g + 515) >> 10) + ((8224 * b + 256) >> 10);
        let cr = ((8224 * r + 256) >> 10) + ((-6887 * g + 110) >> 10) + ((-1337 * b + 646) >> 10);

        Yc48 { y, cb, cr }
    }

    /// YC48からRGBに変換します。
    pub fn to_rgb(self) -> (u8, u8, u8) {
        let y = self.y as i32;
        let cr = self.cr as i32;
        let cb = self.cr as i32;
        let r = (255 * y + ((((22881 * cr) >> 16) + 3) << 10)) >> 12;
        let g = (255 * y + ((((-5616 * cb) >> 16) + ((-11655 * cr) >> 16) + 3) << 10)) >> 12;
        let b = (255 * y + ((((28919 * cb) >> 16) + 3) << 10)) >> 12;

        let r = r.min(255) as u8;
        let g = g.min(255) as u8;
        let b = b.min(255) as u8;
        (r, g, b)
    }
}

pub(crate) fn format_file_filters(file_filters: &[FileFilter]) -> String {
    let mut file_filter = String::new();
    for filter in file_filters {
        let display = format!(
            "{} ({})",
            filter.name,
            if filter.extensions.is_empty() {
                "*".to_string()
            } else {
                filter
                    .extensions
                    .iter()
                    .map(|ext| format!(".{ext}"))
                    .collect::<Vec<_>>()
                    .join(", ")
            }
        );
        file_filter.push_str(&display);
        file_filter.push('\x00');
        if filter.extensions.is_empty() {
            file_filter.push('*');
        } else {
            file_filter.push_str(
                &filter
                    .extensions
                    .iter()
                    .map(|ext| format!("*.{ext}"))
                    .collect::<Vec<_>>()
                    .join(";"),
            );
        }
        file_filter.push('\x00');
    }

    file_filter
}

pub(crate) enum LeakType {
    WideString,
    ValueVector { len: usize, name: String },
    Null,
    Other(String),
}

pub(crate) struct LeakManager {
    ptrs: std::sync::Mutex<Vec<(LeakType, usize)>>,
}

pub(crate) trait IntoLeakedPtr {
    fn into_leaked_ptr(self) -> (LeakType, usize);
}
pub(crate) trait LeakableValue {}

impl LeakManager {
    pub fn new() -> Self {
        Self {
            ptrs: std::sync::Mutex::new(Vec::new()),
        }
    }

    pub fn leak<T: IntoLeakedPtr>(&self, value: T) -> *const T {
        log::debug!("Leaking memory for type {}", std::any::type_name::<T>());
        let mut ptrs = self.ptrs.lock().unwrap();
        let leaked = value.into_leaked_ptr();
        let ptr = leaked.1;
        ptrs.push(leaked);
        ptr as *const T
    }

    pub fn leak_as_wide_string(&self, s: &str) -> *const u16 {
        log::debug!("Leaking wide string: {}", s);
        let mut wide: Vec<u16> = s.encode_utf16().collect();
        wide.push(0); // Null-terminate the string
        let boxed = wide.into_boxed_slice();
        let ptr = Box::into_raw(boxed) as *mut u16 as usize;
        let mut ptrs = self.ptrs.lock().unwrap();
        ptrs.push((LeakType::WideString, ptr));
        ptr as *const u16
    }

    // pub fn leak_ptr_vec<T: IntoLeakedPtr>(&self, vec: Vec<T>) -> *const *const T {
    //     log::debug!("Leaking vector of type {}", std::any::type_name::<T>());
    //     let mut raw_ptrs = Vec::with_capacity(vec.len() + 1);
    //     for item in vec {
    //         let leaked = item.into_leaked_ptr();
    //         let ptr = leaked.1;
    //         raw_ptrs.push(ptr);
    //         let mut ptrs = self.ptrs.lock().unwrap();
    //         ptrs.push(leaked);
    //     }
    //     self.leak_value_vec(raw_ptrs) as _
    // }

    pub fn leak_value_vec<T: LeakableValue>(&self, vec: Vec<T>) -> *const T {
        log::debug!(
            "Leaking value vector of type {}",
            std::any::type_name::<T>()
        );
        let len = vec.len();
        let boxed = vec.into_boxed_slice();
        let ptr = Box::into_raw(boxed) as *mut T as usize;
        let mut ptrs = self.ptrs.lock().unwrap();
        ptrs.push((
            LeakType::ValueVector {
                len,
                name: std::any::type_name::<T>().to_string(),
            },
            ptr,
        ));
        ptr as *const T
    }

    pub fn free_leaked_memory(&self) {
        let mut ptrs = self.ptrs.lock().unwrap();
        while let Some((ptr_type, ptr)) = ptrs.pop() {
            match ptr_type {
                LeakType::WideString => unsafe {
                    let _ = Box::from_raw(ptr as *mut u16);
                },
                LeakType::ValueVector { len, name } => {
                    Self::free_leaked_memory_leakable_value(&name, ptr, len);
                }
                LeakType::Null => {
                    assert!(ptr == 0);
                }
                LeakType::Other(ref type_name) => {
                    Self::free_leaked_memory_other_ptr(type_name, ptr);
                }
            }
        }
    }
}
macro_rules! impl_leak_ptr {
    ($($t:ty),* $(,)?) => {
        $(
            impl IntoLeakedPtr for $t {
                fn into_leaked_ptr(self) -> (LeakType, usize) {
                    let boxed = Box::new(self);
                    let ptr = Box::into_raw(boxed) as usize;
                    (LeakType::Other(std::any::type_name::<$t>().to_string()), ptr)
                }
            }
        )*

        impl LeakManager {
            fn free_leaked_memory_other_ptr(ptr_type: &str, ptr: usize) {
                unsafe {
                    match ptr_type {
                        $(
                            t if t == std::any::type_name::<$t>() => {
                                let _ = Box::from_raw(ptr as *mut $t);
                            },
                        )*
                        _ => {
                            unreachable!("Unknown leaked pointer type: {}", ptr_type);
                        }
                    }
                }
            }
        }
    };
}
macro_rules! impl_leakable_value {
    ($($t:ty),* $(,)?) => {
        $(
            impl LeakableValue for $t {}
        )*
        impl LeakManager {
            fn free_leaked_memory_leakable_value(type_name: &str, ptr: usize, len: usize) {
                unsafe {
                    match type_name {
                        $(
                            t if t == std::any::type_name::<$t>() => {
                                let _ = Box::from_raw(std::slice::from_raw_parts_mut(ptr as *mut $t, len));
                            },
                        )*
                        _ => {
                            unreachable!("Unknown leaked value vector type: {}", type_name);
                        }
                    }
                }
            }
        }
    };
}
impl_leak_ptr!(
    aviutl2_sys::input2::WAVEFORMATEX,
    aviutl2_sys::output2::BITMAPINFOHEADER,
    aviutl2_sys::filter2::FILTER_ITEM,
);
impl_leakable_value!(aviutl2_sys::filter2::FILTER_ITEM_SELECT_ITEM, usize);

impl<T: IntoLeakedPtr> IntoLeakedPtr for Option<T> {
    fn into_leaked_ptr(self) -> (LeakType, usize) {
        match self {
            Some(value) => value.into_leaked_ptr(),
            None => (LeakType::Null, 0),
        }
    }
}

impl Drop for LeakManager {
    fn drop(&mut self) {
        self.free_leaked_memory();
    }
}

/// # Safety
///
/// - `ptr` は有効なLPCWSTRであること。
/// - `ptr` はNull Terminatedなu16文字列を指していること。
pub(crate) unsafe fn load_wide_string(ptr: *const u16) -> String {
    if ptr.is_null() {
        return String::new();
    }

    let mut len = 0;
    while unsafe { *ptr.add(len) } != 0 {
        len += 1;
    }

    unsafe { String::from_utf16_lossy(std::slice::from_raw_parts(ptr, len)) }
}

pub(crate) fn alert_error(error: &anyhow::Error) {
    let _ = native_dialog::DialogBuilder::message()
        .set_title("エラー")
        .set_level(native_dialog::MessageLevel::Error)
        .set_text(format!("エラーが発生しました: {error}"))
        .alert()
        .show();
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_format_file_filters() {
        let filters = vec![
            FileFilter {
                name: "Image Files".to_string(),
                extensions: vec!["png".to_string(), "jpg".to_string()],
            },
            FileFilter {
                name: "All Files".to_string(),
                extensions: vec![],
            },
        ];
        let formatted = format_file_filters(&filters);
        let expected = "Image Files (.png, .jpg)\x00*.png;*.jpg\x00All Files (*)\x00*\x00";
        assert_eq!(formatted, expected);
    }

    #[test]
    fn test_file_filters_macro() {
        let filters = file_filters! {
            "Image Files" => ["png", "jpg"],
            "All Files" => []
        };
        assert_eq!(filters.len(), 2);
        assert_eq!(filters[0].name, "Image Files");
        assert_eq!(
            filters[0].extensions,
            vec!["png".to_string(), "jpg".to_string()]
        );
        assert_eq!(filters[1].name, "All Files");
        assert_eq!(filters[1].extensions, Vec::<String>::new());
    }

    #[test]
    fn test_aviutl2_version() {
        let version = AviUtl2Version::new(2, 0, 15, 0);
        assert_eq!(version.0, 2001500);
        assert_eq!(version.major(), 2);
        assert_eq!(version.minor(), 0);
        assert_eq!(version.patch(), 15);
        assert_eq!(version.build(), 0);

        let version_from_u32: AviUtl2Version = 2001500u32.into();
        assert_eq!(version_from_u32, version);

        let u32_from_version: u32 = version.into();
        assert_eq!(u32_from_version, 2001500);
    }
}