core: implement defaults for some objects

2 files changed, 16 insertions, 0 deletions

diff --git a/nihav-core/src/codecs/mod.rs b/nihav-core/src/codecs/mod.rs
index 1d12883..2999cb6 100644
--- a/nihav-core/src/codecs/mod.rs
+++ b/nihav-core/src/codecs/mod.rs
@@ -77,6 +77,10 @@ impl HAMShuffler {
     }
 }
 
+impl Default for HAMShuffler {
+    fn default() -> Self { Self { lastframe: None } }
+}
+
 #[allow(dead_code)]
 pub struct IPShuffler {
     lastframe: Option<NAVideoBuffer<u8>>,
@@ -101,6 +105,10 @@ impl IPShuffler {
     }
 }
 
+impl Default for IPShuffler {
+    fn default() -> Self { Self { lastframe: None } }
+}
+
 #[allow(dead_code)]
 pub struct IPBShuffler {
     lastframe: Option<NAVideoBuffer<u8>>,
@@ -151,6 +159,10 @@ impl IPBShuffler {
     }
 }
 
+impl Default for IPBShuffler {
+    fn default() -> Self { Self { lastframe: None, nextframe: None } }
+}
+
 #[derive(Debug,Clone,Copy,PartialEq)]
 pub struct MV {
     pub x: i16,
diff --git a/nihav-core/src/frame.rs b/nihav-core/src/frame.rs
index 9756dfb..cd25ca2 100644
--- a/nihav-core/src/frame.rs
+++ b/nihav-core/src/frame.rs
@@ -430,6 +430,10 @@ impl NACodecInfo {
     }
 }
 
+impl Default for NACodecInfo {
+    fn default() -> Self { DUMMY_CODEC_INFO }
+}
+
 impl fmt::Display for NACodecInfo {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         let edata = match self.extradata.clone() {