AudioManager connection class monitoring of the playback state. Adds a
line listener to monitor when the line is started/stopped and responds
accordingly.
Removes squelch control from mono and stereo audio playback components
which was a holdover -- squelch state is now managed within the
audio component for each processing chain.
Redesigned audio manager handling of audio outputs to ensure that only
one channel's audio can be routed to an audio output at a time.
Changed audio outputs to use the shared thread pool manager for
scheduled tasks, instead of creating a thread pool for each audio
output.
while the buffer processor thread is running.
Added check for 0 space available in data line buffers to avoid trying
to write a zero-length audio chunk to the data line.
Added thread sleep for 100 milliseconds when we detect that the data
line buffer is full, to allow time for the data line to drain before we
check it again. Hopefully this should minimize the chattering during
playback when the code was repeatedly hitting the available() method to
check for space availability.
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.
