zymon/PortAudio.jl
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removes extra asynccondition step now that our task isn't blocking

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This commit is contained in:
Spencer Russell 2016-03-23 19:37:42 -04:00
parent f868087e99
commit 56cf15e9df
1 changed files with 16 additions and 33 deletions
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49
src/PortAudio.jl
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@ -87,7 +87,6 @@ type PortAudioStream{T, U}
sink # untyped because of circular type definition
source # untyped because of circular type definition
taskwork::Base.SingleAsyncWork
taskcond::Condition # used to wake the audio task when the PA callback happens
bufstate::BufferState # used to synchronize the portaudio and julia sides
bufinfo::CallbackInfo{T} # immutable data used in the portaudio callback
@ -107,8 +106,7 @@ type PortAudioStream{T, U}
prefill=false, underflow=PAD)
this.source = PortAudioSource{T, U}(indev.name, this, inchans, bufsize;
prefill=true, overflow=OVERWRITE)
this.taskwork = Base.SingleAsyncWork(_ -> wakeaudiotask(this))
this.taskcond = Condition()
this.taskwork = Base.SingleAsyncWork(_ -> audiotask(this))
this.bufstate = PortAudioPending
this.bufinfo = CallbackInfo(inchans, pointer(this.source.pabuf),
outchans, pointer(this.sink.pabuf),
@ -244,38 +242,23 @@ function portaudio_callback{T}(inptr::Ptr{T}, outptr::Ptr{T},
paContinue
end
wakeaudiotask(stream::PortAudioStream) = notify(stream.taskcond)
# this gets called from uv_async_send, so it MUST NOT BLOCK
function audiotask{T, U}(stream::PortAudioStream{T, U})
while true
try
wait(stream.taskcond)
isopen(stream) || break
if stream.bufstate != JuliaPending
continue
end
transpose!(stream.source.jlbuf, stream.source.pabuf)
write(stream.source.ringbuf, stream.source.jlbuf)
read!(stream.sink.ringbuf, stream.sink.jlbuf)
transpose!(stream.sink.pabuf, stream.sink.jlbuf)
stream.bufstate = PortAudioPending
catch ex
# if isa(ex, InterruptException)
# for w in stream.source.waiters
# notify(w, ex; error=true)
# end
# for w in stream.sink.waiters
# notify(w, ex; error=true)
# end
# else
warn("Audio Task died with exception: $ex")
Base.show_backtrace(STDOUT, catch_backtrace())
break
# end
try
if stream.bufstate != JuliaPending
return
end
transpose!(stream.source.jlbuf, stream.source.pabuf)
write(stream.source.ringbuf, stream.source.jlbuf)
read!(stream.sink.ringbuf, stream.sink.jlbuf)
transpose!(stream.sink.pabuf, stream.sink.jlbuf)
stream.bufstate = PortAudioPending
catch ex
warn("Audio Task died with exception: $ex")
Base.show_backtrace(STDOUT, catch_backtrace())
end
end