documented new node classes

app/decoder/ffmpeg/ffmpegdecoder.h

@@ -25,6 +25,9 @@
 
 #include "decoder/decoder.h"
 
+/**
+ * @brief A Decoder derivative that wraps FFmpeg functions as on Olive decoder
+ */
 class FFmpegDecoder : public Decoder
 {
 public:

app/decoder/frame.h

@@ -30,7 +30,9 @@ extern "C" {
 #include "common/rational.h"
 
 /**
- * @brief Abstraction from AVFrame. Currently a simple AVFrame wrapper.
+ * @brief Video frame data or audio sample data from a Decoder
+ *
+ * Abstraction from AVFrame. Currently a simple AVFrame wrapper.
  *
  * This class does not support copying at this time.
  */