webstream

Documentation

Overview

Package webstream provides controls for streaming from the web server.

Index

• func StreamAudioSource(ctx context.Context, source gostream.AudioSource, stream gostream.Stream, ...) error
• func StreamVideoSource(ctx context.Context, source gostream.VideoSource, stream gostream.Stream, ...) error
• type BackoffTuningOptions
  • func (opts *BackoffTuningOptions) GetSleepTimeFromErrorCount(errorCount int) time.Duration
• type Server
  • func NewServer(streams []gostream.Stream, r robot.Robot, logger logging.Logger) (*Server, error)
  • func (ss *Server) AddStream(ctx context.Context, req *streampb.AddStreamRequest) (*streampb.AddStreamResponse, error)
  • func (ss *Server) Close() error
  • func (ss *Server) ListStreams(ctx context.Context, req *streampb.ListStreamsRequest) (*streampb.ListStreamsResponse, error)
  • func (ss *Server) NewStream(config gostream.StreamConfig) (gostream.Stream, error)
  • func (ss *Server) RemoveStream(ctx context.Context, req *streampb.RemoveStreamRequest) (*streampb.RemoveStreamResponse, error)
• type StreamAlreadyRegisteredError
  • func (e *StreamAlreadyRegisteredError) Error() string

Functions

func StreamAudioSource

func StreamAudioSource(
	ctx context.Context,
	source gostream.AudioSource,
	stream gostream.Stream,
	backoffOpts *BackoffTuningOptions,
	logger logging.Logger,
) error

StreamAudioSource starts a stream from an audio source with a throttled error handler.

func StreamVideoSource

func StreamVideoSource(
	ctx context.Context,
	source gostream.VideoSource,
	stream gostream.Stream,
	backoffOpts *BackoffTuningOptions,
	logger logging.Logger,
) error

StreamVideoSource starts a stream from a video source with a throttled error handler.

Types

type BackoffTuningOptions

type BackoffTuningOptions struct {
	// BaseSleep sets the initial amount of time to wait after an error.
	BaseSleep time.Duration
	// MaxSleep determines the maximum amount of time that streamSource is
	// permitted to a sleep after receiving a single error.
	MaxSleep time.Duration
	// Cooldown sets how long since the last error that we can reset our backoff. This
	// should be greater than MaxSleep. This prevents a scenario where we haven't made
	// a call to read for a long time and the error may go away sooner.
	Cooldown time.Duration
}

BackoffTuningOptions represents a set of parameters for determining exponential backoff when receiving multiple simultaneous errors.

BaseSleep is the duration to wait after receiving a new error. After that, the wait time doubles for every subsequent, consecutive error of the same type, until the wait duration reaches the MaxSleep duration.

func (*BackoffTuningOptions) GetSleepTimeFromErrorCount

func (opts *BackoffTuningOptions) GetSleepTimeFromErrorCount(errorCount int) time.Duration

GetSleepTimeFromErrorCount returns a sleep time from an error count.

type Server

type Server struct {
	streampb.UnimplementedStreamServiceServer
	// contains filtered or unexported fields
}

Server implements the gRPC audio/video streaming service.

func NewServer

func NewServer(
	streams []gostream.Stream,
	r robot.Robot,
	logger logging.Logger,
) (*Server, error)

NewServer returns a server that will run on the given port and initially starts with the given stream.

func (*Server) AddStream

func (ss *Server) AddStream(ctx context.Context, req *streampb.AddStreamRequest) (*streampb.AddStreamResponse, error)

AddStream implements part of the StreamServiceServer.

func (*Server) Close

func (ss *Server) Close() error

Close closes the Server and waits for spun off goroutines to complete.

func (*Server) ListStreams

func (ss *Server) ListStreams(ctx context.Context, req *streampb.ListStreamsRequest) (*streampb.ListStreamsResponse, error)

ListStreams implements part of the StreamServiceServer.

func (*Server) NewStream

func (ss *Server) NewStream(config gostream.StreamConfig) (gostream.Stream, error)

NewStream informs the stream server of new streams that are capable of being streamed.

func (*Server) RemoveStream

func (ss *Server) RemoveStream(ctx context.Context, req *streampb.RemoveStreamRequest) (*streampb.RemoveStreamResponse, error)

RemoveStream implements part of the StreamServiceServer.

type StreamAlreadyRegisteredError

type StreamAlreadyRegisteredError struct {
	// contains filtered or unexported fields
}

StreamAlreadyRegisteredError indicates that a stream has a name that is already registered on the stream server.

func (*StreamAlreadyRegisteredError) Error

func (e *StreamAlreadyRegisteredError) Error() string