zymon/PortAudio.jl
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now just using floating-point samplerate

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This commit is contained in:
Spencer Russell 2016-09-29 02:31:07 -04:00
parent eaa5aa96bb
commit 15dcee6245
2 changed files with 19 additions and 19 deletions
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25
src/PortAudio.jl
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@ -89,9 +89,8 @@ immutable CallbackInfo{T}
synced::Bool
end
# paramaterized on the sample type and sampling rate type
type PortAudioStream{T, U}
samplerate::U
type PortAudioStream{T}
samplerate::Float64
blocksize::Int
stream::PaStream
sink # untyped because of circular type definition
@ -112,8 +111,8 @@ type PortAudioStream{T, U}
Ref(Pa_StreamParameters(outdev.idx, outchans, type_to_fmt[T], 0.0, C_NULL))
this = new(sr, blocksize, C_NULL)
finalizer(this, close)
this.sink = PortAudioSink{T, U}(outdev.name, this, outchans, blocksize*2)
this.source = PortAudioSource{T, U}(indev.name, this, inchans, blocksize*2)
this.sink = PortAudioSink{T}(outdev.name, this, outchans, blocksize*2)
this.source = PortAudioSource{T}(indev.name, this, inchans, blocksize*2)
if synced && inchans > 0 && outchans > 0
# we've got a synchronized duplex stream. initialize with the output buffer full
write(this.sink, SampleBuf(zeros(T, blocksize*2, outchans), sr))
@ -136,8 +135,8 @@ end
function PortAudioStream(indev::PortAudioDevice, outdev::PortAudioDevice,
inchans=2, outchans=2; eltype=Float32, samplerate=-1, blocksize=DEFAULT_BLOCKSIZE, synced=false)
if samplerate == -1
sampleratein = rationalize(indev.defaultsamplerate) * Hz;
samplerateout = rationalize(outdev.defaultsamplerate) * Hz;
sampleratein = indev.defaultsamplerate
samplerateout = outdev.defaultsamplerate
if inchans > 0 && outchans > 0 && sampleratein != samplerateout
error("""
Can't open duplex stream with mismatched samplerates (in: $sampleratein, out: $samplerateout).
@ -149,7 +148,7 @@ function PortAudioStream(indev::PortAudioDevice, outdev::PortAudioDevice,
samplerate = samplerateout
end
end
PortAudioStream{eltype, typeof(samplerate)}(indev, outdev, inchans, outchans, samplerate, blocksize, synced)
PortAudioStream{eltype}(indev, outdev, inchans, outchans, samplerate, blocksize, synced)
end
# handle device names given as streams
@ -207,7 +206,7 @@ end
Base.isopen(stream::PortAudioStream) = stream.stream != C_NULL
SampledSignals.samplerate(stream::PortAudioStream) = stream.samplerate
Base.eltype{T, U}(stream::PortAudioStream{T, U}) = T
Base.eltype{T}(stream::PortAudioStream{T}) = T
Base.read(stream::PortAudioStream, args...) = read(stream.source, args...)
Base.read!(stream::PortAudioStream, args...) = read!(stream.source, args...)
@ -217,7 +216,7 @@ Base.flush(stream::PortAudioStream) = flush(stream.sink)
function Base.show(io::IO, stream::PortAudioStream)
println(io, typeof(stream))
println(io, " Samplerate: ", samplerate(stream))
println(io, " Samplerate: ", samplerate(stream), "Hz")
print(io, " Buffer Size: ", stream.blocksize, " frames")
if nchannels(stream.sink) > 0
print(io, "\n ", nchannels(stream.sink), " channel sink: \"", stream.sink.name, "\"")
@ -230,9 +229,9 @@ end
# Define our source and sink types
for (TypeName, Super) in ((:PortAudioSink, :SampleSink),
(:PortAudioSource, :SampleSource))
@eval type $TypeName{T, U} <: $Super
@eval type $TypeName{T} <: $Super
name::UTF8String
stream::PortAudioStream{T, U}
stream::PortAudioStream{T}
chunkbuf::Array{T, 2}
ringbuf::LockFreeRingBuffer{T}
nchannels::Int
@ -250,7 +249,7 @@ end
SampledSignals.nchannels(s::Union{PortAudioSink, PortAudioSource}) = s.nchannels
SampledSignals.samplerate(s::Union{PortAudioSink, PortAudioSource}) = samplerate(s.stream)
SampledSignals.blocksize(s::Union{PortAudioSink, PortAudioSource}) = s.stream.blocksize
Base.eltype{T, U}(::Union{PortAudioSink{T, U}, PortAudioSource{T, U}}) = T
Base.eltype{T}(::Union{PortAudioSink{T}, PortAudioSource{T}}) = T
Base.close(s::Union{PortAudioSink, PortAudioSource}) = close(s.ringbuf)
function Base.show{T <: Union{PortAudioSink, PortAudioSource}}(io::IO, stream::T)

13
test/runtests.jl
View file

@ -8,6 +8,7 @@ end
using PortAudio
using SampledSignals
using RingBuffers
using SampledSignals
function test_callback(inchans, outchans)
nframes = Culong(8)
@ -117,7 +118,7 @@ end
stream = PortAudioStream(2, 0)
buf = read(stream, 5s)
close(stream)
@test size(buf) == (round(Int, 5s * samplerate(stream)), nchannels(stream.source))
@test size(buf) == (round(Int, 5 * samplerate(stream)), nchannels(stream.source))
println("Playing back recording...")
stream = PortAudioStream(0, 2)
write(stream, buf)
@ -133,21 +134,21 @@ end
end
@testset "Samplerate-converting writing" begin
stream = PortAudioStream()
write(stream, SinSource(eltype(stream), samplerate(stream)*0.8, [220Hz, 330Hz]), 3s)
write(stream, SinSource(eltype(stream), samplerate(stream)*1.2, [220Hz, 330Hz]), 3s)
write(stream, SinSource(eltype(stream), samplerate(stream)*0.8, [220, 330]), 3s)
write(stream, SinSource(eltype(stream), samplerate(stream)*1.2, [220, 330]), 3s)
flush(stream)
close(stream)
end
@testset "Open Device by name" begin
stream = PortAudioStream("Built-in Microph", "Built-in Output")
buf = read(stream, 0.001s)
@test size(buf) == (round(Int, 0.001s * samplerate(stream)), nchannels(stream.source))
@test size(buf) == (round(Int, 0.001 * samplerate(stream)), nchannels(stream.source))
write(stream, buf)
io = IOBuffer()
show(io, stream)
@test takebuf_string(io) == """
PortAudio.PortAudioStream{Float32,SIUnits.SIQuantity{Rational{Int64},0,0,-1,0,0,0,0,0,0}}
Samplerate: 48000//1 s⁻¹
PortAudio.PortAudioStream{Float32}
Samplerate: 48000.0Hz
Buffer Size: 4096 frames
2 channel sink: "Built-in Output"
2 channel source: "Built-in Microph\""""