This branch was made because we were having problems with rebasing the original filter-interface branch. Filter-interface was used to make interface for filters and adding into pipeline made a new file (filter.go) that conatins package Filter. This package has the filter interface, with one filter, NoOp. More filters can be added. The filtering stage was placed inbetween lexing and encoding by changing the LexTo function to have the filter as it's destination and making the destination of the filter to be r.encoders
Added a case that allows packets to be sent by unit of time (in seconds) rather than by number of packets or nal methods. Also made a variable that can be changed in vidgrinder to choose the amount of time, called PsiTime
Chunksize can be calculated without needing an ALSA device instance.
Added a DataSize function to pcm package for calculating size of pcm data given relevant attributes.
Removed ChunkSize from config revid config struct.
Changed NewByteLexer to accept an in rather than a pointer.
av/device/device.go now contains the AVDevice interface and implementations of this
interface, namely, raspivid, geovision, webcam and file are contained in the packages
av/device/raspivid, av/device/geovision, av/device/webcam and av/device/file
respctively. config.go and testing was also moved to a new package called config.go in
order to remove would be circular dependency between AVDevice implementations and revid.
Modifications were made elsewhere expecting config.Config to be part of the revid package.
Saxon