*: use latest ffmpeg-sys using bindgen

* Update bindings to newest ffmpeg version for new ffmpeg-sys, which is mostly generated by bindgen
* Bring back removed feature flags
* Fix whitespace formating
* Remove prepended enum names to enum variants
* Remove unneeded allows

src/software/resampling/context.rs

@@ -84,7 +84,7 @@ impl Context {
 	/// Get the remaining delay.
 	pub fn delay(&self) -> Option<Delay> {
 		unsafe {
-			match swr_get_delay(self.as_ptr(), 1) {
+			match swr_get_delay(self.as_ptr() as *mut _, 1) {
 				0 => None,
 				_ => Some(Delay::from(self))
 			}

src/software/resampling/delay.rs

@@ -14,10 +14,10 @@ impl Delay {
 	pub fn from(context: &Context) -> Self {
 		unsafe {
 			Delay {
-				seconds:      swr_get_delay(context.as_ptr(), 1),
-				milliseconds: swr_get_delay(context.as_ptr(), 1000),
-				input:        swr_get_delay(context.as_ptr(), context.input().rate as int64_t),
-				output:       swr_get_delay(context.as_ptr(), context.output().rate as int64_t),
+				seconds:      swr_get_delay(context.as_ptr() as *mut _, 1),
+				milliseconds: swr_get_delay(context.as_ptr() as *mut _, 1000),
+				input:        swr_get_delay(context.as_ptr() as *mut _, context.input().rate as int64_t),
+				output:       swr_get_delay(context.as_ptr() as *mut _, context.output().rate as int64_t),
 			}
 		}
 	}

src/software/resampling/dither.rs

@@ -1,4 +1,5 @@
 use ffi::*;
+use ffi::SwrDitherType::*;
 
 #[derive(Eq, PartialEq, Copy, Clone, Debug)]
 pub enum Dither {
@@ -23,7 +24,7 @@ impl From<SwrDitherType> for Dither {
 			SWR_DITHER_RECTANGULAR         => Dither::Rectangular,
 			SWR_DITHER_TRIANGULAR          => Dither::Triangular,
 			SWR_DITHER_TRIANGULAR_HIGHPASS => Dither::TriangularHighPass,
-		
+
 			SWR_DITHER_NS                     => Dither::None,
 			SWR_DITHER_NS_LIPSHITZ            => Dither::NoiseShapingLipshitz,
 			SWR_DITHER_NS_F_WEIGHTED          => Dither::NoiseShapingFWeighted,
@@ -44,7 +45,7 @@ impl Into<SwrDitherType> for Dither {
 			Dither::Rectangular        => SWR_DITHER_RECTANGULAR,
 			Dither::Triangular         => SWR_DITHER_TRIANGULAR,
 			Dither::TriangularHighPass => SWR_DITHER_TRIANGULAR_HIGHPASS,
-		
+
 			Dither::NoiseShapingLipshitz          => SWR_DITHER_NS_LIPSHITZ,
 			Dither::NoiseShapingFWeighted         => SWR_DITHER_NS_F_WEIGHTED,
 			Dither::NoiseShapingModifiedEWeighted => SWR_DITHER_NS_MODIFIED_E_WEIGHTED,

src/software/resampling/engine.rs

@@ -1,4 +1,5 @@
 use ffi::*;
+use sys::SwrEngine::*;
 
 #[derive(Eq, PartialEq, Copy, Clone, Debug)]
 pub enum Engine {

src/software/resampling/filter.rs

@@ -1,4 +1,5 @@
 use ffi::*;
+use ffi::SwrFilterType::*;
 
 #[derive(Eq, PartialEq, Copy, Clone, Debug)]
 pub enum Filter {