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use Format;
use framing::{AsBytes, Chunky};
use framing::Image as Frame;
use std::os::raw::c_int;
use std::ptr;

/// Represents an image that can be handed over to x264.
pub trait Image {
    /// The format of the image.
    type Format: Format;
    /// The stride for each plane.
    fn strides(&self) -> [c_int; 4];
    /// Each plane.
    fn planes(&self) -> [*const u8; 4];
}

impl<F, T> Image for Chunky<F, T>
where
    T: AsRef<[u8]>,
    F: AsBytes + Format
{
    type Format = F;

    fn strides(&self) -> [c_int; 4] {
        [(F::width() * self.width()) as _, 0, 0, 0]
    }

    fn planes(&self) -> [*const u8; 4] {
        [self.bytes().as_ref().as_ptr(), ptr::null(), ptr::null(), ptr::null()]
    }
}