feat: add basic imgutils support

src/util/frame/video.rs

@@ -318,10 +318,6 @@ impl Video {
 			)
 		}
 	}
-
-	pub fn as_image(&self) -> crate::util::Image {
-		crate::util::Image(self)
-	}
 }
 
 impl Deref for Video {

src/util/image.rs

@@ -0,0 +1,42 @@
+use crate::{format::Pixel, sys::*, util::frame, Error};
+
+pub fn buffer_size(format: Pixel, width: u32, height: u32, align: u32) -> crate::Result<usize> {
+	unsafe {
+		match av_image_get_buffer_size(format.into(), width as i32, height as i32, align as i32) {
+			e if e < 0 => Err(Error::from(e)),
+			size => Ok(size as usize),
+		}
+	}
+}
+
+pub fn to_buffer(source: &frame::Video) -> crate::Result<Vec<u8>> {
+	let mut buffer = Vec::new();
+	into_buffer(source, &mut buffer)?;
+
+	Ok(buffer)
+}
+
+pub fn into_buffer(source: &frame::Video, buffer: &mut Vec<u8>) -> crate::Result<()> {
+	let size = buffer_size(source.format(), source.width(), source.height(), 1)?;
+	buffer.resize(size, 0);
+
+	let written = unsafe {
+		match av_image_copy_to_buffer(
+			buffer.as_mut_ptr(),
+			size as i32,
+			(*source.as_ptr()).data.as_ptr() as *mut _,
+			(*source.as_ptr()).linesize.as_ptr() as *mut _,
+			source.format().into(),
+			source.width() as i32,
+			source.height() as i32,
+			1,
+		) {
+			e if e < 0 => Err(Error::from(e)),
+			size => Ok(size),
+		}
+	}?;
+
+	buffer.shrink_to(written as usize);
+
+	Ok(())
+}

src/util/mod.rs

@@ -14,6 +14,7 @@ pub mod picture;
 pub mod range;
 pub mod rational;
 pub mod time;
+pub mod image;
 
 #[cfg(feature = "log")]
 pub mod log;