rename + readme

1 files changed, 35 insertions, 0 deletions

diff --git a/bv1/codec/src/frameio.rs b/bv1/codec/src/frameio.rs
new file mode 100644
index 0000000..f6cbcbf
--- /dev/null
+++ b/bv1/codec/src/frameio.rs
@@ -0,0 +1,35 @@
+use crate::{Frame, Pixel, PixelValue, P2};
+use std::io::{Read, Result, Write};
+
+impl Frame {
+    pub fn read(inp: &mut impl Read, size: P2) -> Result<Frame> {
+        let mut f = Frame::new(size);
+
+        for y in 0..size.y {
+            for x in 0..size.x {
+                let mut cc = [0u8; 3];
+                inp.read_exact(&mut cc)?;
+                f[P2 { x, y }] = Pixel {
+                    r: cc[0] as PixelValue,
+                    g: cc[1] as PixelValue,
+                    b: cc[2] as PixelValue,
+                };
+            }
+        }
+        Ok(f)
+    }
+
+    pub fn write(out: &mut impl Write, frame: &Frame) -> Result<()> {
+        for y in 0..frame.size.y {
+            for x in 0..frame.size.x {
+                let p = frame[P2 { x, y }];
+                let mut cc = [0u8; 3];
+                cc[0] = p.r.clamp(0, 255) as u8;
+                cc[1] = p.g.clamp(0, 255) as u8;
+                cc[2] = p.b.clamp(0, 255) as u8;
+                out.write_all(&mut cc)?;
+            }
+        }
+        Ok(())
+    }
+}