61 lines
2.7 KiB
Julia
61 lines
2.7 KiB
Julia
function init_pa_shim()
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libdir = joinpath(dirname(@__FILE__), "..", "deps", "usr", "lib")
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libsuffix = ""
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basename = "pa_shim"
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@static if is_linux() && Sys.ARCH == :x86_64
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libsuffix = "x86_64-linux-gnu"
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elseif is_linux() && Sys.ARCH == :i686
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libsuffix = "i686-linux-gnu"
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elseif is_apple() && Sys.ARCH == :x86_64
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libsuffix = "x86_64-apple-darwin14"
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elseif is_windows() && Sys.ARCH == :x86_64
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libsuffix = "x86_64-w64-mingw32"
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elseif is_windows() && Sys.ARCH == :i686
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libsuffix = "i686-w64-mingw32"
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elseif !any(
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(sfx) -> isfile(joinpath(libdir, "$basename.$sfx")),
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("so", "dll", "dylib"))
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error("Unsupported platform $(Sys.MACHINE). You can build your own library by running `make` from $(joinpath(@__FILE__, "..", "deps", "src"))")
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end
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# if there's a suffix-less library, it was built natively on this machine,
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# so load that one first, otherwise load the pre-built one
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global const libpa_shim = Base.Libdl.find_library(
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[basename, "$(basename)_$libsuffix"],
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[libdir])
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libpa_shim == "" && error("Could not load $basename library, please file an issue at https://github.com/JuliaAudio/RingBuffers.jl/issues with your `versioninfo()` output")
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shim_dlib = Libdl.dlopen(libpa_shim)
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# pointer to the shim's process callback
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global const shim_processcb_c = Libdl.dlsym(shim_dlib, :pa_shim_processcb)
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if shim_processcb_c == C_NULL
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error("Got NULL pointer loading `pa_shim_processcb`")
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end
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end
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const pa_shim_errmsg_t = Cint
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const PA_SHIM_ERRMSG_OVERFLOW = Cint(0) # input overflow
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const PA_SHIM_ERRMSG_UNDERFLOW = Cint(1) # output underflow
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const PA_SHIM_ERRMSG_ERR_OVERFLOW = Cint(2) # error buffer overflowed
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# This struct is shared with pa_shim.c
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mutable struct pa_shim_info_t
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inputbuf::Ptr{PaUtilRingBuffer} # ringbuffer for input
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outputbuf::Ptr{PaUtilRingBuffer} # ringbuffer for output
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errorbuf::Ptr{PaUtilRingBuffer} # ringbuffer to send error notifications
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sync::Cint # keep input/output ring buffers synchronized (0/1)
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notifycb::Ptr{Void} # Julia callback to notify on updates (called from audio thread)
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inputhandle::Ptr{Void} # condition to notify on new input data
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outputhandle::Ptr{Void} # condition to notify when ready for output
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errorhandle::Ptr{Void} # condition to notify on new errors
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end
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"""
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PortAudio.shimhash()
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Return the sha256 hash(as a string) of the source file used to build the shim.
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We may use this sometime to verify that the distributed binary stays in sync
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with the rest of the package.
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"""
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shimhash() = unsafe_string(
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ccall((:pa_shim_getsourcehash, libpa_shim), Cstring, ()))
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Base.unsafe_convert(::Type{Ptr{Void}}, info::pa_shim_info_t) = pointer_from_objref(info)
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