fumieval / bindings-portaudio

Raw bindings for portaudio 2.0

Twitter: @fumieval

Haskell

Name	Stars	Issues	Merge Requests	Status	Hackage
barbies-th
bindings-portaudio
data-vector-growable
deriving-aeson
discord-vc-notification
extensible
incremental
mason
membership
monad-skeleton
objective
tangle
tehepero
webauthn
winery
witherable

bindings-portaudio's Issues

cabal file points at wrong repository

cabal file points at bindings-builtins repostiory rather than this one

collect2: error: ld returned 1 exit status

Compiling with ghc-7.8.3, Linux Mint 17.
I installed bindings-portaudio with flag -fALSA, and while trying to compile exapmle/sine.hs, I got the error as follows:

~$ ghc -package-db=.cabal-sandbox/x86_64-linux-ghc-7.8.3-packages.conf.d/ example/sine.hs
Linking example/sine ...
/usr/bin/ld: ~/workspace/github/bindings-portaudio/.cabal-sandbox/lib/x86_64-linux-ghc-7.8.3/bindings-portaudio-0.0/libHSbindings-portaudio-0.0.a(pa_unix_util.o): undefined reference to symbol 'pthread_create@@GLIBC_2.2.5'
//lib/x86_64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status

Suggestion: use 2D arrays instead of vectors

Currently, the library requires you to have a type constructor that is storable, applicative, and foldable. Moreover, you can't really make it variable length, so you need to hardcode the number of channels.

I suggest an alternative. Use a 2D array from here. The one dimension is time, and the other is the channel index. Specifically, it would use StorableArray (Int, Int) a where a is the sample type. (Also, Storable would become a superclass of the portaudio sample class to make the type signatures easier.) You might need to use unsafeForeignPtrToStorableArray.

Alternatively, simple lists could be used. The type would be [f a] for foldable f and sample type a, which would then be converted to [a]. This list is then written to an array using pokeArray.

No available API on x86_64 linux

bindings-portaudio/example$ example-portaudio 500 500
Initialization: 0
Available APIs:
Opening the default stream: -9985
example-portaudio: user error (Failed.)

The system has ALSA installed and flashplayer works well.
Any workaround?

Suggestion: Add a way to check if the stream is finished to System.PortAudio

I find the System.PortAudio module quite handy! I suggest adding a way to see if the stream is finished to it. Currently, the only way to figure out if the stream is done playing yet is to try to figure out the timing.

Perhaps the module should expose a "Stream" object, which can be stopped, started, and checked if finished. I also see that there is a way to make callbacks that are fired when the stream is finished, so that would be helpful too!

Please don't bundle portaudio

Installing dependencies is what package managers are for. Portaudio is an actively developed project which makes it even more troublesome as any fixes upstream won't immediately be reflected in this package.

Perhaps there's a deeper reason why you need to bundle it so please say so if that's the case.

PS: the link to portaudio in README is broken, after all, that project is not a Haskell one so it's not on Hackage.

Please release new version

The version on github exposes a System.PortAudio module, but the version on Hackage does not. Would be nice to see an updated version on Hackage.

Linking failure on OSX

https://gist.github.com/kazu-yamamoto/a6947c34aa19bde299df

% ghc hello-world.hs -L/usr/lib -L/opt/local/lib
Linking hello-world ...
Undefined symbols for architecture x86_64:
  "_PaUtil_AllocateMemory", referenced from:
      _Pa_Initialize in libHSbindings-portaudio-0.0.1.a(pa_front.o)
  "_PaUtil_FreeMemory", referenced from:
      _Pa_Initialize in libHSbindings-portaudio-0.0.1.a(pa_front.o)
      _Pa_Terminate in libHSbindings-portaudio-0.0.1.a(pa_front.o)
  "_PaUtil_InitializeClock", referenced from:
      _Pa_Initialize in libHSbindings-portaudio-0.0.1.a(pa_front.o)
  "_paHostApiInitializers", referenced from:
      _Pa_Initialize in libHSbindings-portaudio-0.0.1.a(pa_front.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)