Change main.rs to lib.rs and create example mp4info project. Update readme and license.

Cargo.toml

@@ -4,7 +4,5 @@ version = "0.1.0"
 authors = ["Alf <alf.g.jr@gmail.com>"]
 edition = "2018"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
 [dependencies]
 byteorder = "1"

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 Alfred Gutierrez
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,8 +1,18 @@
 # mp4.rs
 MP4 Reader in Rust
 
-#### Development
+## Development
+
+#### Requirements
+* [Rust](https://www.rust-lang.org/)
+
+#### Build
 ```
 cargo build
-cargo run
+```
+
+#### Run Examples
+* `mp4info`
+```
+cargo run --example mp4info <movie.mp4>
 ```

examples/mp4info.rs

@@ -0,0 +1,24 @@
+extern crate mp4;
+
+use std::env;
+use std::fs::File;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    match args.len() {
+        2 => {
+            let filename = &args[1];
+            let f = File::open(filename).unwrap();
+
+            let bmff = mp4::read_mp4(f);
+
+            // Print results.
+            println!("{:?}", bmff.unwrap());
+        },
+        _ => {
+            println!("Usage: mp4info <filename>");
+        }
+    }
+
+}

src/lib.rs

@@ -16,7 +16,7 @@ pub enum Error {
 pub type Result<T> = std::result::Result<T, Error>;
 
 #[derive(Debug, Default)]
-struct BMFF {
+pub struct BMFF {
     ftyp: FtypBox,
     moov: MoovBox,
 }
@@ -99,19 +99,12 @@ impl fmt::Debug for FourCC {
     }
 }
 
-fn main() -> std::io::Result<()> {
+pub fn read_mp4(f: File) -> Result<BMFF> {
 
     // Open file and read boxes.
-    let f = File::open("tears-of-steel-2s.mp4")?;
-    // let boxes = read_boxes(f);
-    let bmff = read_boxes(f);
+    let bmff = read_boxes(f).unwrap();
 
-    // Print results.
-    println!("{:?}", bmff.unwrap());
-
-    // Done.
-    println!("done");
-    Ok(())
+    Ok(bmff)
 }
 
 fn read_boxes(f: File) -> Result<BMFF> {
@@ -233,7 +226,6 @@ fn parse_mvhd_box(f: &mut BufReader<File>, _offset: u64, size: u32) -> Result<Mv
     let duration = f.read_u32::<byteorder::BigEndian>().unwrap();
     let rate = f.read_u32::<byteorder::BigEndian>().unwrap();
 
-
     Ok(MvhdBox{
         version,
         flags,