lsl_tools 0.3.1

Lab Streaming Layer tools in pure Dart: a web-safe facade over liblsl, recording to XDF, a WebSocket bridge between networks, test outlets, and the `lsl` command line tool.

0.3.1

0.3.0

• Bridge protocol 3 lets values travel in the stream's own channel format (float32, double64, int8/16/32/64, string) instead of always as float32, and every channel of a string stream reaches the outlets at the far end. int64 is exact to 2^53 where ints are JavaScript numbers (web).
• Bridged, relayed and published streams become LSL outlets in their original format and channel count.
• lsl replay plays a recording with the original format and channel count.
• Recordings (LslRecorder) write values in the stream's own format.
• The facade (LslBackend, LslInlet, LslOutlet, LslChunk, the options), receiveChunks and the clock types moved to lsl_core, but are still exported from lsl_tools. LslFormat, LslChannel, LslTimeCorrection and LslScope are now LSLChannelFormat, LSLChannel, LSLTimeCorrection and ResolveScope (deprecated aliases remain).
• LslOutlet.push takes any numeric TypedData (converted to the outlet's format); pushStrings takes channelCount strings per sample.
• LslChunk.typed: the values in the stream's own format, if known.
• Outlets are created in LslOutletSpec.format (it was always float32 or string).
• Requires liblsl ^1.2.0, peer_coordinator ^0.4.3, signal_core ^0.2.0 and xdf ^0.2.0.

Unreleased

• lsl cyton: --gain, --emg (bipolar channels published as an EMG stream), --markers (the marker board mode, with markers typed on standard input and published as a markers stream) and --sd/--sd-rate (an SD card recording, up to 16 kHz).
• lsl cyton-sd converts an SD card recording of the Cyton to XDF.

0.2.1

• Requires liblsl ^1.1.2.

0.2.0

• Fixed: LslRecorder clock offset did not match standard XDF
• An event-driven inlet's latency is measured until the end of the chunk
• New receiveChunks(inlet, options), stream version of inlet samples.
• The latency in an LSL inlet's ClockChain does not include the wait/polling delay when using event driven mode.
• receiveChunks uses pullIntervalMs for delivery, and slower streams will deliver immediately. pullInterval of Duration.zero will always deliver immediately.
• Bridge protocol 2; source timestamps are kept and a ClockChain gives offset, drift, error bound, latency and jitter per hop.
• The bridge's clock is measured as LSL measures an outlet's (bursts, the fastest round trip) with a drift fit
• Bridge inlets take LslInletOptions: corrected and dejittered time stamps by default, raw ones with clockSync: false.
• lsl bridge publishes a BridgeTiming stream and has --stats.
• New LslDataStreamPump and DataStreamInlet continue a chain through a peer_coordinator session (WebRTC).
• Monotinic clocks are now used instead of wall clocks where LSL is not available (e.g. web).

0.1.0

• Initial version, from signal_viewer_lsl: the lsl facade, LslRecorder, the LSL bridge, test outlets; and the lsl command line tool.