X-Git-Url: https://git.nihav.org/?a=blobdiff_plain;f=nihav-core%2Fsrc%2Fcodecs%2Fmod.rs;h=c6ee95ec71a844043d449af5b3e6ade48e7dc5ba;hb=0975e7e77fc0b337dad578071a6deca6aa2b4697;hp=516d9ace408bbc60eabc127b1e5eca6502e08749;hpb=7d57ae2f680d7a1eba7af2ee831f305b2f0f9324;p=nihav.git

diff --git a/nihav-core/src/codecs/mod.rs b/nihav-core/src/codecs/mod.rs
index 516d9ac..c6ee95e 100644
--- a/nihav-core/src/codecs/mod.rs
+++ b/nihav-core/src/codecs/mod.rs
@@ -4,6 +4,7 @@ use crate::io::byteio::ByteIOError;
 use crate::io::bitreader::BitReaderError;
 use crate::io::codebook::CodebookError;
 pub use crate::options::*;
+pub use std::str::FromStr;
 
 /// A list specifying general decoding errors.
 #[derive(Debug,Clone,Copy,PartialEq)]
@@ -131,6 +132,46 @@ impl RegisteredDecoders {
     }
 }
 
+/// Frame skipping mode for decoders.
+#[derive(Clone,Copy,PartialEq,Debug)]
+pub enum FrameSkipMode {
+    /// Decode all frames.
+    None,
+    /// Decode all key frames.
+    KeyframesOnly,
+    /// Decode only intra frames.
+    IntraOnly,
+}
+
+impl Default for FrameSkipMode {
+    fn default() -> Self {
+        FrameSkipMode::None
+    }
+}
+
+impl FromStr for FrameSkipMode {
+    type Err = DecoderError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            FRAME_SKIP_OPTION_VAL_NONE      => Ok(FrameSkipMode::None),
+            FRAME_SKIP_OPTION_VAL_KEYFRAME  => Ok(FrameSkipMode::KeyframesOnly),
+            FRAME_SKIP_OPTION_VAL_INTRA     => Ok(FrameSkipMode::IntraOnly),
+            _ => Err(DecoderError::InvalidData),
+        }
+    }
+}
+
+impl ToString for FrameSkipMode {
+    fn to_string(&self) -> String {
+        match *self {
+            FrameSkipMode::None             => FRAME_SKIP_OPTION_VAL_NONE.to_string(),
+            FrameSkipMode::KeyframesOnly    => FRAME_SKIP_OPTION_VAL_KEYFRAME.to_string(),
+            FrameSkipMode::IntraOnly        => FRAME_SKIP_OPTION_VAL_INTRA.to_string(),
+        }
+    }
+}
+
 /// A list specifying general encoding errors.
 #[derive(Debug,Clone,Copy,PartialEq)]
 #[allow(dead_code)]
@@ -158,6 +199,10 @@ impl From<ByteIOError> for EncoderError {
     fn from(_: ByteIOError) -> Self { EncoderError::Bug }
 }
 
+impl From<AllocatorError> for EncoderError {
+    fn from(_: AllocatorError) -> Self { EncoderError::AllocError }
+}
+
 /// Encoding parameter flag to force constant bitrate mode.
 pub const ENC_MODE_CBR: u64 = 1 << 0;
 /// Encoding parameter flag to force constant framerate mode.