Method get_src_ptr

rustcv-backend-msmf/src/stream.rs:395–407

(
        &self,
        scanline0: *mut u8,
        pitch: i32,
        src_pitch: usize,
        total_height: usize,
    )

    /// Gets the source pointer, handling negative pitch (bottom-up images).
    #[inline]
    unsafe fn get_src_ptr(
        &self,
        scanline0: *mut u8,
        pitch: i32,
        src_pitch: usize,
        total_height: usize,
    ) -> *const u8 {
        if pitch < 0 {
            scanline0.sub((total_height - 1) * src_pitch)
        } else {
            scanline0
        }
    }

    /// Copies a single row from source to destination.
    #[inline]