Migrate crates to Rust edition 2021 (#24)

* Migrate ffmpeg-sys to Edition 2021

* Migrate ffmpeg to Edition 2021

* Remove now-redundant imports

* Reorder imports after edition migration

src/codec/decoder/audio.rs

@@ -1,18 +1,18 @@
 use std::ops::{Deref, DerefMut};
 
 #[cfg(not(feature = "ffmpeg_5_0"))]
-use ffi::*;
+use crate::ffi::*;
 #[cfg(not(feature = "ffmpeg_5_0"))]
 use libc::c_int;
 
 use super::Opened;
-use codec::Context;
+use crate::codec::Context;
 #[cfg(not(feature = "ffmpeg_5_0"))]
-use frame;
-use util::format;
+use crate::frame;
+use crate::util::format;
 #[cfg(not(feature = "ffmpeg_5_0"))]
-use {packet, Error};
-use {AudioService, ChannelLayout};
+use crate::{packet, Error};
+use crate::{AudioService, ChannelLayout};
 
 pub struct Audio(pub Opened);
 

src/codec/decoder/check.rs

@@ -1,4 +1,4 @@
-use ffi::*;
+use crate::ffi::*;
 use libc::c_int;
 
 bitflags! {

src/codec/decoder/conceal.rs

@@ -1,4 +1,4 @@
-use ffi::*;
+use crate::ffi::*;
 use libc::c_int;
 
 bitflags! {

src/codec/decoder/decoder.rs

@@ -2,9 +2,9 @@ use std::ops::{Deref, DerefMut};
 use std::ptr;
 
 use super::{Audio, Check, Conceal, Opened, Subtitle, Video};
-use codec::{traits, Context};
-use ffi::*;
-use {Dictionary, Discard, Error, Rational};
+use crate::codec::{traits, Context};
+use crate::ffi::*;
+use crate::{Dictionary, Discard, Error, Rational};
 
 pub struct Decoder(pub Context);
 

src/codec/decoder/mod.rs

@@ -23,10 +23,10 @@ pub use self::opened::Opened;
 
 use std::ffi::CString;
 
-use codec::Context;
-use codec::Id;
-use ffi::*;
-use Codec;
+use crate::codec::Context;
+use crate::codec::Id;
+use crate::ffi::*;
+use crate::Codec;
 
 pub fn new() -> Decoder {
     Context::new().decoder()

src/codec/decoder/opened.rs

@@ -2,9 +2,9 @@ use std::ops::{Deref, DerefMut};
 use std::ptr;
 
 use super::{Audio, Decoder, Subtitle, Video};
-use codec::{Context, Profile};
-use ffi::*;
-use {media, packet, Error, Frame, Rational};
+use crate::codec::{Context, Profile};
+use crate::ffi::*;
+use crate::{media, packet, Error, Frame, Rational};
 
 pub struct Opened(pub Decoder);
 

src/codec/decoder/slice.rs

@@ -1,4 +1,4 @@
-use ffi::*;
+use crate::ffi::*;
 use libc::c_int;
 
 bitflags! {

src/codec/decoder/subtitle.rs

@@ -1,11 +1,11 @@
 use std::ops::{Deref, DerefMut};
 
-use ffi::*;
+use crate::ffi::*;
 use libc::c_int;
 
 use super::Opened;
-use codec::Context;
-use {packet, Error};
+use crate::codec::Context;
+use crate::{packet, Error};
 
 pub struct Subtitle(pub Opened);
 
@@ -13,7 +13,7 @@ impl Subtitle {
     pub fn decode<P: packet::Ref>(
         &mut self,
         packet: &P,
-        out: &mut ::Subtitle,
+        out: &mut crate::Subtitle,
     ) -> Result<bool, Error> {
         unsafe {
             let mut got: c_int = 0;

src/codec/decoder/video.rs

@@ -1,19 +1,19 @@
 use std::ops::{Deref, DerefMut};
 
 #[cfg(not(feature = "ffmpeg_5_0"))]
-use ffi::*;
+use crate::ffi::*;
 use libc::c_int;
 
 use super::{slice, Opened};
-use codec::Context;
-use color;
+use crate::codec::Context;
+use crate::color;
 #[cfg(not(feature = "ffmpeg_5_0"))]
-use frame;
-use util::chroma;
-use util::format;
+use crate::frame;
+use crate::util::chroma;
+use crate::util::format;
 #[cfg(not(feature = "ffmpeg_5_0"))]
-use {packet, Error};
-use {FieldOrder, Rational};
+use crate::{packet, Error};
+use crate::{FieldOrder, Rational};
 
 pub struct Video(pub Opened);