Difference between revisions of "Sound data structures"

Revision as of 17:28, 30 April 2012

At the request of Don Stuart, here is some information about the formats supported by different sound libraries.

In-memory sound formats are fairly diverse.

Library	Sound file format
HCodecs	`(Audible a) => DiffUArray Int a`
hsndfile	`MArray` with `Float` and `Double`
HSoundFile	`[[Double]]`
ALUT	`OpenAL.AL.Buffer`
WAVE	`[[Int32]]`
Sox	Lists, Storable Vector, whatever you have a `hPut` and `hGetContents` function for.
libsox	Storable Vector

Library	Sound file format
OpenAL	`Ptr UInt8`, `Ptr Int16`, 1-N channels
SDL-mixer	`ForeignPtr ChunkStruct`, `ForeignPtr MusicStruct`

Library	Sound file format
dsp	`Array a, [a]`
synthesizer	`[a]`, StorableVector.Lazy a, `(StateT s Maybe a, s)` (like stream-fusion)
jack	Operates via mapping functions `mainMono :: (CFloat -> IO CFloat) -> IO ()` `mainStereo :: ((CFloat, CFloat) -> IO (CFloat, CFloat)) -> IO ()`, `StorableArray`
alsa-pcm	`(SampleFrame a) => Ptr a`
Hommage	`[a]`

Library	Sound file format
HCodecs	Reads and writes MIDI files
midi	Reads and writes MIDI files
alsa-midi	Uses midi library
Haskore	Uses midi library
alsa-seq	Custom midi and audio signal structures
YampaSynth	Stand-alone program

Library	Sound file format
hbeat	The relevant source files are missing!
hogg	Very low-level API for Ogg internals only
libmpd	No sound buffer API
sonic-visualizer	No sound buffer API
truelevel	Stand-alone program (uses WAVE)
wavconvert	Stand-alone program

@@ Line 59: / Line 59: @@
 |-
 | [[Synthesizer|synthesizer]]
-| <hask>[a]</hask>, [[Storable Vector|StorableVector.Lazy a]], <hask>(StateT s Maybe a, s)</hask> (like [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/stream-fusion stream-fusion])
+| <hask>[a]</hask>, [[Storable Vector|StorableVector.Lazy a]], <hask>(StateT s Maybe a, s)</hask> (like {{HackagePackage|id=stream-fusion}})
 |-
 | [[JACK|jack]]
-| Operates via mapping functions<br /><hask>mainMono :: (CFloat -> IO CFloat) -> IO ()</hask><br /><hask>mainStereo :: ((CFloat, CFloat) -> IO (CFloat, CFloat)) -> IO ()</hask>
+| Operates via mapping functions<br /><hask>mainMono :: (CFloat -> IO CFloat) -> IO ()</hask><br /><hask>mainStereo :: ((CFloat, CFloat) -> IO (CFloat, CFloat)) -> IO ()</hask>, <br /><hask>StorableArray</hask>
+|-
+| [[ALSA|alsa-pcm]]
+| <hask>(SampleFrame a) => Ptr a</hask>
 |-
 | [[Hommage]]