3 Commits

Author	SHA1	Message	Date
Denny	a302d098de	126 - Significant improvement in processor and memory utilization. Refactors all USB tuner sample processing with a new USBTransferProcessor class. LibUSB transfer timeout processing is now consolidated under the TunerManager and tuners register with this singleton to auto-start or auto-stop USB bulk transfer processing. Resolves long-standing issue impacting multi-tuner use where the second and subsequent tuners may have been routinely starved for LibUSB processing time under heavy-loading. All tuner buffer threaded processing is now handled as runnables in the scheduled thread pool, eliminating tuner-dedicated processing threads. Added tuner buffer size management to prevent memory blow-out when down-stream processing is either lagging or impacted by java garbage collection operations. Both tuners and individual DDC channels now have bounded sample buffer queues that automatically enter and exit overflow mode when predefined max/reset thresholds are met. When any queue goes into overflow mode, sample buffers are simply dropped in favor of preserving program/memory stability.	2017-01-28 09:08:11 -05:00
denny	c3d52ff86e	Merges #34 Major redesign of Tuner, Channel and Alias management. ... Changes to model, view and controller components and updates all gui editors. Removes the configuration panel and tree and replaces with 3 new panels. Updates playlist.xml to a new playlist_v2.xml format.	2016-04-01 08:23:49 -04:00
denny	70e62ebb35	Adds airspy USB tuner support and updates the spectral display ... component. -Airspy supported with 10 and 2.5 MSps sample rates. Additional decimation may be added later. -Spectral display updated to include smoothing and filtering options. Note: the decimated output of a tuner channel from the airspy is 48,076.9 samples per second, versus the normal 48 kHz decimated rate. This is 1.0015 times the normal rate and doesn't appear to impact the decoders or audio processing. Therefore, no fractional resampling has been added.	2015-11-07 08:18:41 -05:00