revid/config.go: started commenting config fields

revid/config.go

@@ -111,27 +111,59 @@ const (
 
 // Config provides parameters relevant to a revid instance. A new config must
 // be passed to the constructor. Default values for these fields are defined
-// as consts at the beginning of this file.
+// as consts above.
 type Config struct {
+	// LogLevel is the revid logging verbosity level.
+	// Valid values are defined by enums from the logger package: logger.Debug,
+	// logger.Info, logger.Warning logger.Error, logger.Fatal.
 	LogLevel int8
 
-	Input         uint8
-	InputCodec    uint8
-	Outputs       []uint8
-	RtmpMethod    uint8
-	Packetization uint8
+	// Input defines the input data source.
+	//
+	// Valid values are defined by enums:
+	// Raspivid:
+	//		Read data from a Raspberry Pi Camera.
+	// V4l:
+	//		Read from webcam.
+	// File:
+	// 		Location must be specified in InputPath field.
+	Input uint8
 
-	// Quantize specifies whether the input to
-	// revid will have constant or variable
+	// InputCodec defines the input codec we wish to use, and therefore define the
+	// lexer for use in the pipeline. In most cases this defaults according to a
+	// particular input. Both Raspivid and V4l use H264, but File input may use
+	// H264 or MJPEG.
+	InputCodec uint8
+
+	// Outputs define the outputs we wish to output data too.
+	//
+	// Valid outputs are defined by enums:
+	// File:
+	// 		Location must be defined by the OutputPath field. MPEG-TS packetization
+	//		is used.
+	// Http:
+	// 		Destination is defined by the sh field located in /etc/netsender.conf.
+	// 		MPEGT-TS packetization is used.
+	// Rtmp:
+	// 		Destination URL must be defined in the RtmpUrl field. FLV packetization
+	//		is used.
+	// Rtp:
+	// 		Destination is defined by RtpAddr field, otherwise it will default to
+	//		localhost:6970. MPEGT-TS packetization is used.
+	Outputs []uint8
+
+	// Quantize specifies whether the input to revid will have constant or variable
 	// bitrate.
 	Quantize bool
 
-	// FlipHorizonatla and FlipVertical specify
-	// whether video frames should be flipped.
+	// FlipHorizonatla and FlipVertical specify whether video frames should be flipped.
 	FlipHorizontal bool
 	FlipVertical   bool
 
-	FramesPerClip      uint
+	FramesPerClip uint
+
+	// RtmpUrl specifies the Rtmp output destination URL. This must be defined if
+	// RTMP is to be used as an output.
 	RtmpUrl            string
 	Bitrate            uint
 	OutputPath         string
@@ -223,7 +255,6 @@ func (c *Config) Validate(r *Revid) error {
 			case Http, Rtp:
 				c.Logger.Log(logger.Info, pkg+"defaulting frames per clip for http out", "framesPerClip", httpFramesPerClip)
 				c.FramesPerClip = httpFramesPerClip
-				c.Packetization = Mpegts
 			default:
 				return errors.New("bad output type defined in config")
 			}