zymon/PortAudio.jl
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bumps latency for more reliable performance

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This commit is contained in:
Spencer Russell 2020-01-30 11:28:44 -05:00
parent f123478231
commit d069e75a9f
1 changed files with 12 additions and 2 deletions
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14
src/PortAudio.jl
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@ -67,6 +67,15 @@ mutable struct PortAudioStream{T}
# this inner constructor is generally called via the top-level outer
# constructor below
# TODO: handle blocksize=0, that should be the default and generally works
# much better than trying to specify
# TODO: expose latency parameter
# TODO: pre-fill outbut buffer on init
# TODO: recover from xruns - currently with low latencies (e.g. 0.01) it
# will run fine for a while and then fail with the first xrun.
# TODO: figure out whether we can get deterministic latency...
# TODO: write a latency tester app
function PortAudioStream{T}(indev::PortAudioDevice, outdev::PortAudioDevice,
inchans, outchans, sr, blocksize,
warn_xruns) where {T}
@ -74,10 +83,10 @@ mutable struct PortAudioStream{T}
outchans = outchans == -1 ? outdev.maxoutchans : outchans
inparams = (inchans == 0) ?
Ptr{Pa_StreamParameters}(0) :
Ref(Pa_StreamParameters(indev.idx, inchans, type_to_fmt[T], 0.0, C_NULL))
Ref(Pa_StreamParameters(indev.idx, inchans, type_to_fmt[T], 0.1, C_NULL))
outparams = (outchans == 0) ?
Ptr{Pa_StreamParameters}(0) :
Ref(Pa_StreamParameters(outdev.idx, outchans, type_to_fmt[T], 0.0, C_NULL))
Ref(Pa_StreamParameters(outdev.idx, outchans, type_to_fmt[T], 0.1, C_NULL))
this = new(sr, blocksize, C_NULL, warn_xruns)
# finalizer(close, this)
this.sink = PortAudioSink{T}(outdev.name, this, outchans)
@ -199,6 +208,7 @@ end
isopen(stream::PortAudioStream) = stream.stream != C_NULL
SampledSignals.samplerate(stream::PortAudioStream) = stream.samplerate
SampledSignals.blocksize(stream::PortAudioStream) = stream.blocksize
eltype(stream::PortAudioStream{T}) where T = T
read(stream::PortAudioStream, args...) = read(stream.source, args...)