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.
Addition of new structs and helper functions for passing around pcm clips/buffers and their formats so that we don't have to import and rely on yobert/alsa code.
Updated any commands and alsa package to use refactored code.
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.
Added required new params to config structure, and therefore also added new defaults and validation checking.
Also updated revid's update func so that we can control new parameters using vars. Now using gvctrl in
startRTSPCamera function and interpreting revid config to configure camera.
This change included a rename of IntraRefreshPeriod to MinPeriod, and the addition of the ClipDuration param. PSI are now written before IDR. Clips are no longer outputed
based on PSI but rather a time ClipDuration, where ClipDuration >= MinPeriod, however, PSI must still be at the beginning of each clip. Also created functionality to update
meta time even if we don't have a response to update.
audio device input is now handle in its own package which resides in the new input directory
a list of codecs was added to codecutil package to help with multiple packages using the same codecs
Removed the command line flags that were used to specifiy local and remote addresses for RTP and RTCP. These are now
derived from the initial RTSP connection and also from the RTSP SETUP method reply.
Now adopting an RTCP client so that the RTP stream from the RTSP server can be maintained past 1 minute.
This change involved some refactor.
The rtcp.NewClient signature has been simplified. There is now a default send interval and name for use
in the source description in the receiver reports. These can be customised if required with the new
SetSendInterval and SetName funcs. The rtcp.NewClient signature now takes an rtp.Client, so that it
can get information from the RTP stream, like most recent sequence number. As a result of this requirement
the rtp package parse file has been extended with some functions for parsing out the sequence number and
ssrc from RTP packets and the RTP client provides getters for these things.
Added 'RTSPCamera' option to description for 'Input' revid-cli flag. Also added other flags required
to set config params for RTSP input, like RTSPURL, RTPRecvAddr and RTCPAddr.
The audio lexers need to know how much data they will be receiving unlike video which has a fixed buffer size.
This means that all the lex function will need to be given a buffer size since they are used as a function pointer with the same signature.
Started working on adding exposure, brightness, saturation and awb flags to revid-cli so that we can control raspivid parameters.
Updated revid logic to give these to raspivid and updated config to consider these parameters in config validation.
Removed packetization flag for revid-cli as no longer required.
Packetization will be decided based on outputs.
Removed buffer type definition and Write receiver func in
mtsSender_test.go as this is now defined in revid.go.
Made ringbuffer size and element size consisten no matter the
output methods, as we're now going to only be putting h264 in there.
Modified H264 lex function to take an io.Writer rather than an
Encoder.
Removed destination []loadSender slice from revids fields and
added an encoder []stream.Encoder slice to hold encoders used
during a particular configuration. Each encoder will write to
the desired outputs.
Modified logic regarding encoder and sender setup. We now check
what outputs we have and add encoders to revid's encoder slice
depending on what each output requires.
Modified outputClips routine such that it ranges through revid's
encoders and encodes to them. They then write to the senders and
they handle logic regarding the amount of data they send out
and when. They also handle actions to perform on send failures.
Wrote multiSender struct which will be written to from encoders.
It will then use it's senders to distribute the data accordingly
to senders that work with the encoding from said encoders.
Modified senders so that their load methods no longer take ring
chunks, but rather slices.
Modified senders such that their release methods no longer
perform chunk closing.
revid-cli: initialising config.Output slice when no outputs are defined so that a default output can still be set
Approved-by: Alan Noble <anoble@gmail.com>
Trek H