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‎Project.toml

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name = "PortMidi"
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uuid = "42b16160-194f-40b3-8419-7a13c10fa643"
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authors = ["SteffenPL <[email protected]> and contributors"]
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version = "1.0.0-DEV"
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version = "0.1.0"
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[deps]
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PortMidi_jll = "6b227df9-c220-5195-838c-e1464939a66f"
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[compat]
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julia = "1.6"
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PortMidi_jll = "2.0.4"
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[extras]
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Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"

‎README.md

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# PortMidi
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# PortMidi.jl
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<!---
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[![Stable](https://img.shields.io/badge/docs-stable-blue.svg)](https://SteffenPL.github.io/PortMidi.jl/stable/)
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[![Dev](https://img.shields.io/badge/docs-dev-blue.svg)](https://SteffenPL.github.io/PortMidi.jl/dev/)
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[![Build Status](https://github.com/SteffenPL/PortMidi.jl/actions/workflows/CI.yml/badge.svg?branch=main)](https://github.com/SteffenPL/PortMidi.jl/actions/workflows/CI.yml?query=branch%3Amain)
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--->
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A Julia wrapper for the [PortMidi](https://github.com/PortMidi/portmidi).
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See the [C documentation](https://portmidi.github.io/portmidi_docs/) for a list of functions.
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_This wrapper is work in progress. As this is just a hobby for me, I am also happy to hand over the repository in more suitable hands._
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## Example
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See the `examples` folder for a test case.
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```julia
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using PortMidi
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Pm_Initialize()
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# 0. Get info about devices
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for i in 0:Pm_CountDevices()-1
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info = unsafe_load(Pm_GetDeviceInfo(i))
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println(i, ": ", info.output > 0 ? "[Output ] " : "[Input] ", unsafe_string(info.name), " (", unsafe_string(info.interf), ")")
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end
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# 1. Select device
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id = 0 # change this number if needed
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print("Use: ", unsafe_string(unsafe_load(Pm_GetDeviceInfo(id)).name))
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# 2. Open device
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stream = Ref{Ptr{PortMidi.PortMidiStream}}(C_NULL)
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Pm_OpenOutput(stream, id, C_NULL, 0, C_NULL, C_NULL, 0)
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# don't forget to call later: Pm_Close(stream[])
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# 3. Send MIDI messages
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Note_ON = 0x90
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Note_OFF = 0x80
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C4 = 60
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function play_note(stream, note, velocity, duration)
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Pm_WriteShort(stream[], 0, Pm_Message(Note_ON, note, velocity))
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sleep(duration)
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Pm_WriteShort(stream[], 0, Pm_Message(Note_OFF, note, velocity))
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end
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# make a random tune...
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for i in 1:12
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@async play_note(stream, C4 + rand([-5,-2,0,2,5]), rand(80:120), 0.4 + 0.05*rand())
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sleep(0.5 + 0.05*rand())
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end
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# 4. Close device
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Pm_Close(stream[])
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```
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On Windows, one could use the program [loopMIDI](https://www.tobias-erichsen.de/software/loopmidi.html) to create a virtual MIDI device
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and in combination with some virtual instruments (e.g. DAWs, VCV Rack, ...) one can also then listen to the notes in realtime. But this
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is only one out of many possible ways to use the `PortMidi` library.

‎examples/play_notes.jl

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using PortMidi
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Pm_Initialize()
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# 0. Get info about devices
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for i in 0:Pm_CountDevices()-1
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info = unsafe_load(Pm_GetDeviceInfo(i))
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println(i, ": ", info.output > 0 ? "[Output ] " : "[Input] ", unsafe_string(info.name), " (", unsafe_string(info.interf), ")")
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end
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# 1. Select device
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id = 11
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print("Use: ", unsafe_string(unsafe_load(Pm_GetDeviceInfo(id)).name))
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# 2. Open device
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stream = Ref{Ptr{PortMidi.PortMidiStream}}(C_NULL)
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Pm_OpenOutput(stream, id, C_NULL, 0, C_NULL, C_NULL, 0)
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# don't forget to call later: Pm_Close(stream[])
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# 3. Send MIDI messages
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Note_ON = 0x90
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Note_OFF = 0x80
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C4 = 60
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function play_note(stream, note, velocity, duration)
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Pm_WriteShort(stream[], 0, Pm_Message(Note_ON, note, velocity))
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sleep(duration)
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Pm_WriteShort(stream[], 0, Pm_Message(Note_OFF, note, velocity))
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end
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# make a random tune...
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for i in 1:12
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@async play_note(stream, C4 + rand([-5,-2,0,2,5]), rand(80:120), 0.4 + 0.05*rand())
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sleep(0.5 + 0.05*rand())
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end
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# 4. Close device
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Pm_Close(stream[])

‎gen/Manifest.toml

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# This file is machine-generated - editing it directly is not advised
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julia_version = "1.9.1"
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manifest_format = "2.0"
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project_hash = "40f0b0cca44e6451975797e90b2d06a0b8d8569a"
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[[deps.ArgTools]]
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uuid = "0dad84c5-d112-42e6-8d28-ef12dabb789f"
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version = "1.1.1"
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[[deps.Artifacts]]
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uuid = "56f22d72-fd6d-98f1-02f0-08ddc0907c33"
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[[deps.Base64]]
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uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
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[[deps.CEnum]]
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git-tree-sha1 = "389ad5c84de1ae7cf0e28e381131c98ea87d54fc"
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uuid = "fa961155-64e5-5f13-b03f-caf6b980ea82"
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version = "0.5.0"
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[[deps.Clang]]
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deps = ["CEnum", "Clang_jll", "Downloads", "Pkg", "TOML"]
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git-tree-sha1 = "846054622cb22aa63b5d51b5d84ec04b42d4d587"
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uuid = "40e3b903-d033-50b4-a0cc-940c62c95e31"
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version = "0.17.8"
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[[deps.Clang_jll]]
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deps = ["Artifacts", "JLLWrappers", "Libdl", "Pkg", "TOML", "Zlib_jll", "libLLVM_jll"]
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git-tree-sha1 = "124bb00d4ceace456054f17c7cb01e5c8195c609"
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uuid = "0ee61d77-7f21-5576-8119-9fcc46b10100"
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version = "14.0.6+4"
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[[deps.Dates]]
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deps = ["Printf"]
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uuid = "ade2ca70-3891-5945-98fb-dc099432e06a"
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[[deps.Downloads]]
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deps = ["ArgTools", "FileWatching", "LibCURL", "NetworkOptions"]
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uuid = "f43a241f-c20a-4ad4-852c-f6b1247861c6"
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version = "1.6.0"
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[[deps.FileWatching]]
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uuid = "7b1f6079-737a-58dc-b8bc-7a2ca5c1b5ee"
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[[deps.InteractiveUtils]]
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deps = ["Markdown"]
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uuid = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
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[[deps.JLLWrappers]]
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deps = ["Artifacts", "Preferences"]
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git-tree-sha1 = "7e5d6779a1e09a36db2a7b6cff50942a0a7d0fca"
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uuid = "692b3bcd-3c85-4b1f-b108-f13ce0eb3210"
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version = "1.5.0"
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[[deps.LibCURL]]
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deps = ["LibCURL_jll", "MozillaCACerts_jll"]
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uuid = "b27032c2-a3e7-50c8-80cd-2d36dbcbfd21"
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version = "0.6.3"
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[[deps.LibCURL_jll]]
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deps = ["Artifacts", "LibSSH2_jll", "Libdl", "MbedTLS_jll", "Zlib_jll", "nghttp2_jll"]
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uuid = "deac9b47-8bc7-5906-a0fe-35ac56dc84c0"
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version = "7.84.0+0"
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[[deps.LibGit2]]
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deps = ["Base64", "NetworkOptions", "Printf", "SHA"]
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uuid = "76f85450-5226-5b5a-8eaa-529ad045b433"
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[[deps.LibSSH2_jll]]
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deps = ["Artifacts", "Libdl", "MbedTLS_jll"]
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uuid = "29816b5a-b9ab-546f-933c-edad1886dfa8"
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version = "1.10.2+0"
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[[deps.Libdl]]
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uuid = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
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[[deps.Logging]]
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uuid = "56ddb016-857b-54e1-b83d-db4d58db5568"
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[[deps.Markdown]]
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deps = ["Base64"]
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uuid = "d6f4376e-aef5-505a-96c1-9c027394607a"
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[[deps.MbedTLS_jll]]
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deps = ["Artifacts", "Libdl"]
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uuid = "c8ffd9c3-330d-5841-b78e-0817d7145fa1"
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version = "2.28.2+0"
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[[deps.MozillaCACerts_jll]]
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uuid = "14a3606d-f60d-562e-9121-12d972cd8159"
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version = "2022.10.11"
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[[deps.NetworkOptions]]
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uuid = "ca575930-c2e3-43a9-ace4-1e988b2c1908"
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version = "1.2.0"
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[[deps.Pkg]]
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deps = ["Artifacts", "Dates", "Downloads", "FileWatching", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "Serialization", "TOML", "Tar", "UUIDs", "p7zip_jll"]
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uuid = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
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version = "1.9.0"
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[[deps.PortMidi_jll]]
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deps = ["Artifacts", "JLLWrappers", "Libdl", "alsa_jll"]
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git-tree-sha1 = "865436b433a7ed35ca02b5ef12a00ce29c75364b"
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uuid = "6b227df9-c220-5195-838c-e1464939a66f"
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version = "2.0.4+0"
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[[deps.Preferences]]
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deps = ["TOML"]
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git-tree-sha1 = "00805cd429dcb4870060ff49ef443486c262e38e"
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uuid = "21216c6a-2e73-6563-6e65-726566657250"
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version = "1.4.1"
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[[deps.Printf]]
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deps = ["Unicode"]
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uuid = "de0858da-6303-5e67-8744-51eddeeeb8d7"
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[[deps.REPL]]
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deps = ["InteractiveUtils", "Markdown", "Sockets", "Unicode"]
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uuid = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
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[[deps.Random]]
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deps = ["SHA", "Serialization"]
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uuid = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
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[[deps.SHA]]
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uuid = "ea8e919c-243c-51af-8825-aaa63cd721ce"
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version = "0.7.0"
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[[deps.Serialization]]
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uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
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[[deps.Sockets]]
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uuid = "6462fe0b-24de-5631-8697-dd941f90decc"
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[[deps.TOML]]
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deps = ["Dates"]
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uuid = "fa267f1f-6049-4f14-aa54-33bafae1ed76"
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version = "1.0.3"
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[[deps.Tar]]
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deps = ["ArgTools", "SHA"]
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uuid = "a4e569a6-e804-4fa4-b0f3-eef7a1d5b13e"
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version = "1.10.0"
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[[deps.UUIDs]]
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deps = ["Random", "SHA"]
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uuid = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
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[[deps.Unicode]]
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uuid = "4ec0a83e-493e-50e2-b9ac-8f72acf5a8f5"
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[[deps.Zlib_jll]]
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deps = ["Libdl"]
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uuid = "83775a58-1f1d-513f-b197-d71354ab007a"
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version = "1.2.13+0"
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[[deps.alsa_jll]]
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deps = ["Artifacts", "JLLWrappers", "Libdl", "Pkg"]
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git-tree-sha1 = "69859a01e7735ce5b49b1328827f6e3f4cdd7d19"
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uuid = "45378030-f8ea-5b20-a7c7-1a9d95efb90e"
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version = "1.2.5+0"
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[[deps.libLLVM_jll]]
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deps = ["Artifacts", "Libdl"]
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uuid = "8f36deef-c2a5-5394-99ed-8e07531fb29a"
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version = "14.0.6+3"
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[[deps.nghttp2_jll]]
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deps = ["Artifacts", "Libdl"]
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uuid = "8e850ede-7688-5339-a07c-302acd2aaf8d"
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version = "1.48.0+0"
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[[deps.p7zip_jll]]
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deps = ["Artifacts", "Libdl"]
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uuid = "3f19e933-33d8-53b3-aaab-bd5110c3b7a0"
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version = "17.4.0+0"

‎gen/Project.toml

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[deps]
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Clang = "40e3b903-d033-50b4-a0cc-940c62c95e31"
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PortMidi_jll = "6b227df9-c220-5195-838c-e1464939a66f"

‎gen/epilogue.jl

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Pm_Message(status, data1, data2) = ((((data2) << 16) & 0xFF0000) | (((data1) << 8) & 0xFF00) | ((status) & 0xFF))
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Pm_MessageStatus(msg) = ((msg) & 0xFF)
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Pm_MessageData1(msg) = (((msg) >> 8) & 0xFF)
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Pm_MessageData2(msg) = (((msg) >> 16) & 0xFF)
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export Pm_Message, Pm_MessageStatus, Pm_MessageData1, Pm_MessageData2

‎gen/generate.jl

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using Clang.Generators
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using PortMidi_jll
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cd(@__DIR__)
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include_dir = normpath(PortMidi_jll.artifact_dir, "include")
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options = load_options(joinpath(@__DIR__, "generator.toml"))
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args = get_default_args()
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push!(args, "-I$include_dir")
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headers = detect_headers(include_dir, args)
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ctx = create_context(headers, args, options)
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build!(ctx)

‎gen/generator.toml

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[general]
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library_name = "libportmidi"
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output_file_path = "../src/PortMidi.jl"
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module_name = "PortMidi"
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jll_pkg_name = "PortMidi_jll"
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# use_julia_native_enum_type = true
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# prologue_file_path = "prologue.jl"
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# epilogue_file_path = "epilogue.jl"
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# export_symbol_prefixes = ["Pm"]
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# output_ignorelist = ["TRUE", "FALSE"]
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ignore_pure_definition = false

‎gen/prologue.jl

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to_c_type(::Type{<:AbstractString}) = Cstring # or Ptr{Cchar}
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to_c_type(t::Type{<:Union{AbstractArray,Ref}}) = Ptr{eltype(t)}

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