diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
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+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
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+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ {one line to give the program's name and a brief idea of what it does.}
+ Copyright (C) {year} {name of author}
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see .
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ {project} Copyright (C) {year} {fullname}
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+.
diff --git a/MusicW.js b/MusicW.js
new file mode 100644
--- /dev/null
+++ b/MusicW.js
@@ -0,0 +1,96 @@
+/*
+ * @class
+ * @property {string | File | Blob} this.source
+ * @property {('created' | 'loading' | 'decoding' | 'decoded' | 'error')} this.status
+ * @property {?string} this.error
+ * @property {?AudioBuffer} this.buffer
+ *
+ * @param {string | File | Blob} source - the source to load the audio buffer from
+ * @param {WebAudioContext} ctx - the web audio context to use for decoding
+ */
+function Buffer(source, ctx) {
+ this.source = source;
+ this.ctx = ctx;
+
+ this.status = 'created';
+ this.error = null;
+ this.buffer = null;
+}
+
+Buffer.prototype._changeStatus = function (onStatusChange, status, error, buffer) {
+ this.status = status;
+ this.error = error != null ? error : null; // If undefined set to null (not undefined)
+ this.buffer = buffer != null ? buffer : null;
+ onStatusChange(this);
+}
+
+/**
+ * @param {function(buffer: Buffer): void} onStatusChange
+ */
+Buffer.prototype.startLoadingAndDecoding = function(onStatusChange) {
+ var closure = this;
+ var sourceIsUrl = typeof this.source === 'string';
+
+ this._changeStatus(onStatusChange, 'loading');
+
+ var loader = sourceIsUrl ? new XMLHttpRequest() : new FileReader();
+
+ loader.onerror = function () {
+ var message = 'Error loading buffer: ' + (sourceIsUrl ? loader.statusText : loader.error.message);
+ closure._changeStatus(onStatusChange, 'error', message);
+ }
+ loader.onabort = this._changeStatus.bind(this, onStatusChange, 'abort', 'Read aborted', null);
+
+ loader.onload = function() {
+ closure._changeStatus(onStatusChange, 'decoding');
+
+ var arrayBuffer = sourceIsUrl ? loader.response : loader.result;
+ closure.ctx.decodeAudioData(arrayBuffer,
+ function success(audioBuffer) {
+ closure._changeStatus(onStatusChange, 'decoded', null, audioBuffer);
+ },
+ function failure(error) {
+ closure._changeStatus(onStatusChange, 'error', 'Error decoding buffer: ' + error.message);
+ }
+ );
+ }
+
+ // Start reading.
+ if (sourceIsUrl) {
+ loader.responseType = 'arraybuffer';
+ loader.open('GET', this.source, true);
+ loader.send();
+ } else {
+ loader.readAsArrayBuffer(this.source);
+ }
+}
+
+function startLoadingAndDecodingMultiple(list, cb){
+ var closure = []
+ var loaded = []
+ for (i in list){
+
+ console.log(i)
+ console.log(list[i])
+ console.log(loaded)
+ list[i].startLoadingAndDecoding((x)=>{
+ console.log("x is : " + x)
+ console.log("x.status is : " + x.status)
+
+ closure.push(x)
+ var haveLoaded = true
+ for (j in closure){
+ haveLoaded = (closure[j].status == "error" || closure[j].status == "abort" || closure[j].status == "decoded")&&haveLoaded;
+ if(haveLoaded){
+ loaded.push(closure[j])
+ }
+ }
+ console.log("cb test case: haveloaded - "+(haveLoaded) +" loadedlength - "+loaded.length);
+ if (haveLoaded && loaded.length >= list.length ){
+ console.log("cb being called...")
+ cb(closure)
+ }
+ });
+ }
+ console.log("closure: "+closure)
+}
diff --git a/Setup.hs b/Setup.hs
new file mode 100644
--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/musicw.cabal b/musicw.cabal
new file mode 100644
--- /dev/null
+++ b/musicw.cabal
@@ -0,0 +1,53 @@
+name: musicw
+version: 0.2.0
+synopsis: Sound synthesis library, to be used with GHCJS and Web Audio API
+description: A library for sound synthesis, currently targeting GHCJS and the Web Audio API. Used in the Inner Ear and Estuary projects.
+homepage: http://github.com/d0kt0r0/reflex-synth/blob/master/README.md
+license: BSD3
+license-file: LICENSE
+author: David Ogborn, Jamie Beverley, Luis Navarro del Angel, Spencer Park and others
+maintainer: ogbornd@mcmaster.ca
+copyright: 2017- David Ogborn, Jamie Beverley, Luis Navarro del Angel, Spencer Park and others
+category: Web
+build-type: Simple
+cabal-version: >=1.10
+extra-source-files:
+
+Library
+ hs-source-dirs: src
+ js-sources: MusicW.js
+ Build-Depends:
+ base >= 4.11.1.0 && < 4.12,
+ containers >= 0.5.11.0 && < 0.6,
+ safe >= 0.3.17 && < 0.4,
+ ghcjs-base >= 0.2.0.0 && < 0.3,
+ ghcjs-dom >= 0.9.2.0 && < 0.10,
+ text >= 1.2.3.0 && < 1.3,
+ array >= 0.5.2.0 && < 0.6,
+ ghcjs-prim >= 0.1.1.0 && < 0.2,
+ data-default >= 0.7.1.1 && < 0.8,
+ transformers >= 0.5.5.0 && < 0.6,
+ file-embed >= 0.0.10.1 && < 0.1,
+ time >= 1.8.0.2 && < 1.9,
+ monad-loops >= 0.4.3 && < 0.5,
+ json >= 0.9.2 && < 0.10,
+ bytestring >= 0.10.8.2 && < 0.11,
+ mtl >= 2.2.2 && < 2.3
+ GHC-Options: -Wall -fwarn-tabs
+ Exposed-modules: Sound.MusicW.AudioContext
+ Sound.MusicW.FloatArraySpec
+ Sound.MusicW.AudioBuffer
+ Sound.MusicW.Buffer
+ Sound.MusicW.Node
+ Sound.MusicW.SynthDef
+ Sound.MusicW.Synth
+ Sound.MusicW.Envelopes
+ Sound.MusicW.Transformations
+ Sound.MusicW.Worklets
+ Sound.MusicW
+ other-modules:
+ default-language: Haskell2010
+
+source-repository head
+ type: git
+ location: https://github.com/dktr0/MusicW.git
diff --git a/src/Sound/MusicW.hs b/src/Sound/MusicW.hs
new file mode 100644
--- /dev/null
+++ b/src/Sound/MusicW.hs
@@ -0,0 +1,12 @@
+module Sound.MusicW (module E) where
+
+import Sound.MusicW.AudioContext as E
+import Sound.MusicW.FloatArraySpec as E
+import Sound.MusicW.AudioBuffer as E
+import Sound.MusicW.Buffer as E
+import Sound.MusicW.Node as E
+import Sound.MusicW.SynthDef as E
+import Sound.MusicW.Synth as E
+import Sound.MusicW.Envelopes as E
+import Sound.MusicW.Transformations as E
+import Sound.MusicW.Worklets as E
diff --git a/src/Sound/MusicW/AudioBuffer.hs b/src/Sound/MusicW/AudioBuffer.hs
new file mode 100644
--- /dev/null
+++ b/src/Sound/MusicW/AudioBuffer.hs
@@ -0,0 +1,124 @@
+{-# LANGUAGE JavaScriptFFI #-}
+module Sound.MusicW.AudioBuffer where
+
+import GHCJS.Types
+import GHCJS.Marshal.Pure
+import Control.Monad
+import GHCJS.Prim (toJSArray, fromJSInt, getProp)
+
+import Sound.MusicW.AudioContext
+import Sound.MusicW.FloatArraySpec
+
+newtype AudioBuffer = AudioBuffer JSVal
+instance Show AudioBuffer where show _ = "an AudioBuffer"
+instance PToJSVal AudioBuffer where pToJSVal (AudioBuffer val) = val
+instance PFromJSVal AudioBuffer where pFromJSVal = AudioBuffer
+
+newtype Float32Array = Float32Array JSVal
+instance Show Float32Array where show _ = "a Float32Array"
+instance PToJSVal Float32Array where pToJSVal (Float32Array val) = val
+instance PFromJSVal Float32Array where pFromJSVal = Float32Array
+
+instantiateArraySpec :: Either Float32Array FloatArraySpec -> IO Float32Array
+instantiateArraySpec (Left f32Arr) = return f32Arr
+instantiateArraySpec (Right spec) = do
+ array <- js_createTypedArray $ arraySpecSize spec
+ fillArray 0 spec array
+ return array
+
+fillArray :: Int -> FloatArraySpec -> Float32Array -> IO ()
+fillArray _ EmptyArray _ = return ()
+fillArray i (Const n x tl) arr = do
+ js_typedArraySetConst i (i + n) x arr
+ fillArray (i + n) tl arr
+fillArray i (Segment xs tl) arr = do
+ jsArray <- toJSArray $ fmap pToJSVal xs
+ len <- fmap fromJSInt $ getProp jsArray "length"
+ js_typedArraySet i jsArray arr
+ fillArray (i + len) tl arr
+fillArray i (Repeated rep xs tl) arr = do
+ jsArray <- toJSArray $ fmap pToJSVal xs
+ len <- fmap fromJSInt $ getProp jsArray "length"
+ forM_ [0..rep-1] $ \it -> js_typedArraySet (i + (it * len)) jsArray arr
+ fillArray (i + (rep * len)) tl arr
+
+
+-- TODO: can all (or most?) of the "safe" declarations here be unsafe for efficiency?
+
+foreign import javascript safe
+ "if (Float32Array.prototype.fill !== void 0) { \
+ \ $2.fill($1); \
+ \} else { \
+ \ for (var i = 0, len = a.length; i < len; i++) \
+ \ $2[i] = $1; \
+ \}"
+ js_typedArrayFill :: Double -> Float32Array -> IO ()
+
+foreign import javascript safe
+ "if (Float32Array.prototype.fill !== void 0) { \
+ \ $4.fill($3, $1, $2); \
+ \} else { \
+ \ for (var i = $1; i < Math.min($2, $4.length); i++) \
+ \ $4[i] = $3; \
+ \}"
+ js_typedArraySetConst :: Int -> Int -> Double -> Float32Array -> IO ()
+ -- fromIdx -> toIdx (exclusive) -> value -> array -> IO ()
+
+foreign import javascript safe
+ "$3.set($2, $1);"
+ js_typedArraySet :: Int -> JSVal -> Float32Array -> IO ()
+ -- startIdx -> fillFromJSArray -> array -> IO ()
+
+foreign import javascript safe
+ "$2[$1]"
+ js_typedArrayGetAt :: Int -> Float32Array -> IO Double
+
+foreign import javascript safe
+ "$3[$1] = $2;"
+ js_typedArraySetAt :: Int -> Double -> Float32Array -> IO ()
+
+foreign import javascript safe
+ "new Float32Array($1)"
+ js_typedArrayFromArray :: JSVal -> IO Float32Array
+
+foreign import javascript safe
+ "new Float32Array($1)"
+ js_createTypedArray :: Int -> IO Float32Array
+
+foreign import javascript safe
+ "$1.length"
+ js_typedArrayLength :: Float32Array -> IO Int
+
+foreign import javascript safe
+ "$4.createBuffer($1, $2, $3)"
+ js_createAudioBuffer :: Int -> Int -> Double -> AudioContext -> IO AudioBuffer
+ -- numChannels -> length (in samples) -> sampleRate (frames/sec) -> ctx -> buffer
+
+foreign import javascript safe
+ "$1.getChannelData($2)"
+ js_channelData :: AudioBuffer -> Int -> IO Float32Array
+ -- buffer -> channel (0 indexed) -> data
+
+foreign import javascript safe
+ "$3.copyToChannel($1, $2);"
+ js_copyToChannel :: Float32Array -> Int -> AudioBuffer -> IO ()
+
+foreign import javascript safe
+ "$1.length"
+ js_bufferLength :: AudioBuffer -> IO Int
+
+foreign import javascript safe
+ "$1.duration"
+ js_bufferDuration :: AudioBuffer -> IO AudioTime
+
+foreign import javascript safe
+ "$1.numberOfChannels"
+ js_bufferNumChannels :: AudioBuffer -> IO Int
+
+foreign import javascript safe
+ "$1.inputBuffer"
+ js_apeInputBuffer :: JSVal -> IO AudioBuffer
+
+foreign import javascript safe
+ "$1.outputBuffer"
+ js_apeOutputBuffer :: JSVal -> IO AudioBuffer
diff --git a/src/Sound/MusicW/AudioContext.hs b/src/Sound/MusicW/AudioContext.hs
new file mode 100644
--- /dev/null
+++ b/src/Sound/MusicW/AudioContext.hs
@@ -0,0 +1,142 @@
+{-# LANGUAGE FlexibleInstances, JavaScriptFFI #-}
+
+module Sound.MusicW.AudioContext where
+
+import GHCJS.DOM.Types (js_eq)
+import GHCJS.Types
+import GHCJS.Marshal.Pure
+import Data.Text
+import Data.Time
+import Control.Monad.IO.Class
+import Control.Monad.Trans.Reader
+
+type AudioTime = Double
+
+newtype AudioContext = AudioContext JSVal
+
+instance PToJSVal AudioContext where pToJSVal (AudioContext val) = val
+
+instance PFromJSVal AudioContext where pFromJSVal = AudioContext
+
+data AudioContextState = ACRunning | ACSuspended | ACClosed deriving (Show, Eq)
+
+instance PToJSVal AudioContextState where
+ pToJSVal ACRunning = js_acRunning
+ pToJSVal ACSuspended = js_acSuspended
+ pToJSVal ACClosed = js_acClosed
+
+instance PFromJSVal AudioContextState where
+ pFromJSVal x | x `js_eq` js_acRunning = ACRunning
+ pFromJSVal x | x `js_eq` js_acSuspended = ACSuspended
+ pFromJSVal x | x `js_eq` js_acClosed = ACClosed
+
+foreign import javascript unsafe "\"running\"" js_acRunning :: JSVal
+foreign import javascript unsafe "\"suspended\"" js_acSuspended :: JSVal
+foreign import javascript unsafe "\"closed\"" js_acClosed :: JSVal
+
+foreign import javascript safe
+ "new (window.AudioContext || window.webkitAudioContext)()"
+ newAudioContext :: IO AudioContext
+
+foreign import javascript unsafe
+ "window.___ac = $1;"
+ setGlobalAudioContext :: AudioContext -> IO ()
+
+foreign import javascript safe
+ "if (window.___ac == null) { \
+ \ window.___ac = new (window.AudioContext || window.webkitAudioContext)();\
+ \} $r = window.___ac;"
+ getGlobalAudioContext :: IO AudioContext
+
+foreign import javascript unsafe
+ "$1.currentTime"
+ getAudioTime :: AudioContext -> IO AudioTime
+
+-- State management functions, both a sync and async version
+
+foreign import javascript unsafe
+ "$1.state"
+ js_getState :: AudioContext -> IO JSVal
+
+getState :: AudioContext -> IO AudioContextState
+getState ac = pFromJSVal <$> js_getState ac
+
+foreign import javascript interruptible
+ "$1.resume().then($c)['catch'](function(e){$c(''+e);});" -- ffi parser treats 'catch' as keyword even in id ctx
+ js_resumeSync :: AudioContext -> IO JSVal
+
+foreign import javascript unsafe
+ "$1.resume();"
+ resume :: AudioContext -> IO ()
+
+resumeSync :: AudioContext -> IO (Maybe Text)
+resumeSync ac = pFromJSVal <$> js_resumeSync ac
+
+foreign import javascript interruptible
+ "$1.suspend().then($c)['catch'](function(e){$c(''+e);});"
+ js_suspendSync :: AudioContext -> IO JSVal
+
+foreign import javascript unsafe
+ "$1.suspend();"
+ suspend :: AudioContext -> IO ()
+
+suspendSync :: AudioContext -> IO (Maybe Text)
+suspendSync ac = pFromJSVal <$> js_suspendSync ac
+
+foreign import javascript interruptible
+ "$1.close().then($c)['catch'](function(e){$c(''+e);});"
+ js_closeSync :: AudioContext -> IO JSVal
+
+foreign import javascript unsafe
+ "$1.close();"
+ close :: AudioContext -> IO ()
+
+closeSync :: AudioContext -> IO (Maybe Text)
+closeSync ac = pFromJSVal <$> js_closeSync ac
+
+foreign import javascript unsafe
+ "$1.sampleRate"
+ getSampleRate :: AudioContext -> IO Double
+
+foreign import javascript unsafe
+ "$1.destination"
+ getDestination :: AudioContext -> IO JSVal
+
+class (MonadIO m) => AudioIO m where
+ audioContext :: m AudioContext
+
+audioTime :: AudioIO m => m AudioTime
+audioTime = audioContext >>= liftIO . getAudioTime
+
+sampleRate :: AudioIO m => m Double
+sampleRate = audioContext >>= liftIO . getSampleRate
+
+destination :: AudioIO m => m JSVal -- TODO: not crazy about the JSVal return type here...
+destination = audioContext >>= liftIO . getDestination
+
+type AudioContextIO = ReaderT AudioContext IO
+
+instance AudioIO AudioContextIO where
+ audioContext = ask
+
+runAudioContextIO :: AudioContext -> AudioContextIO a -> IO a
+runAudioContextIO ac acio = (runReaderT acio) ac
+
+liftAudioIO :: MonadIO m => AudioContextIO a -> m a
+liftAudioIO x = do
+ ac <- liftIO $ getGlobalAudioContext
+ liftIO $ runAudioContextIO ac x
+
+-- | Utility functions
+
+dbamp :: Double -> Double
+dbamp x = 10.0 ** (x / 20.0)
+
+ampdb :: Double -> Double
+ampdb x = 20.0 * (logBase 10 x)
+
+midicps :: Double -> Double
+midicps x = 440.0 * (2.0 ** ((x - 69.0) / 12.0))
+
+cpsmidi :: Double -> Double
+cpsmidi x = 69.0 + 12.0 * (logBase 2 (x / 440.0))
diff --git a/src/Sound/MusicW/Buffer.hs b/src/Sound/MusicW/Buffer.hs
new file mode 100644
--- /dev/null
+++ b/src/Sound/MusicW/Buffer.hs
@@ -0,0 +1,99 @@
+module Sound.MusicW.Buffer (
+ Buffer(..),
+ BufferStatus(..),
+ bufferStatus,
+ createBuffer,
+ startLoadingAndDecodingWithCallback,
+ js_getAudioBuffer,
+ js_createBufferFromURL,
+ js_startLoadingAndDecodingMultiple,
+ isBufferLoaded
+) where
+
+import Control.Monad.IO.Class
+import Control.Monad (forM,liftM)
+import Data.Map
+import Data.JSString(JSString, unpack)
+
+import GHCJS.DOM.File
+import GHCJS.Types
+import GHCJS.Marshal.Pure
+import GHCJS.Marshal.Internal
+import GHCJS.Foreign.Callback
+
+import Sound.MusicW.AudioContext
+import Sound.MusicW.AudioBuffer
+
+newtype Buffer = Buffer JSVal
+
+instance Show Buffer where show _ = "a Buffer"
+
+instance PToJSVal Buffer where pToJSVal (Buffer val) = val
+
+instance ToJSVal Buffer where toJSVal (Buffer v) = return v
+-- instance ToJSVal [Buffer] where toJSVal bufs= toJSValListOf
+
+ -- toJSValListOf :: [a] -> IO JSVal
+
+data BufferStatus
+ = BufferUnderspecified
+ | BufferLoading
+ | BufferError String
+ | BufferLoaded AudioBuffer
+
+isBufferLoaded :: BufferStatus -> Bool
+isBufferLoaded (BufferLoaded _) = True
+isBufferLoaded _ = False
+
+bufferStatus :: Buffer -> IO (Maybe BufferStatus)
+bufferStatus buffer = do
+ rawStatus <- js_getBufferStatus buffer
+ case unpack rawStatus of
+ "loading" -> return $ Just BufferLoading
+ "decoding" -> return $ Just BufferLoading
+ "error" -> do
+ err <- js_getBufferError buffer
+ return $ Just $ BufferError $ unpack err
+ "decoded" -> do
+ audioBuffer <- js_getAudioBuffer buffer
+ return $ Just $ BufferLoaded audioBuffer
+ otherwise -> return Nothing
+
+createBuffer :: File -> IO Buffer
+createBuffer file = do
+ ctx <- getGlobalAudioContext
+ js_createBuffer file ctx
+
+startLoadingAndDecodingWithCallback :: Buffer -> (Buffer -> IO ()) -> IO ()
+startLoadingAndDecodingWithCallback buffer evTrigger = do
+ cb <- asyncCallback1 $ \buf -> evTrigger (Buffer buf)
+ js_startLoadingAndDecoding buffer cb
+ releaseCallback cb
+
+foreign import javascript safe
+ "new Buffer($1, $2)"
+ js_createBuffer :: File -> AudioContext -> IO Buffer
+
+foreign import javascript safe
+ "new Buffer($1, $2)"
+ js_createBufferFromURL :: JSString -> AudioContext -> IO Buffer
+
+foreign import javascript safe
+ "$1.startLoadingAndDecoding($2);"
+ js_startLoadingAndDecoding :: Buffer -> Callback (JSVal -> IO ()) -> IO ()
+ -- ^ actually Buffer
+foreign import javascript safe
+ "startLoadingAndDecodingMultiple($1, $2)"
+ js_startLoadingAndDecodingMultiple:: JSVal -> Callback (JSVal -> IO ()) -> IO ()
+
+foreign import javascript safe
+ "$1.status"
+ js_getBufferStatus :: Buffer -> IO JSString
+
+foreign import javascript safe
+ "$1.error"
+ js_getBufferError :: Buffer -> IO JSString
+
+foreign import javascript safe
+ "$1.buffer"
+ js_getAudioBuffer :: Buffer -> IO AudioBuffer
diff --git a/src/Sound/MusicW/Envelopes.hs b/src/Sound/MusicW/Envelopes.hs
new file mode 100644
--- /dev/null
+++ b/src/Sound/MusicW/Envelopes.hs
@@ -0,0 +1,26 @@
+module Sound.MusicW.Envelopes where
+
+import Sound.MusicW.AudioContext
+import Sound.MusicW.Node
+import Sound.MusicW.SynthDef
+
+ampEnv :: AudioIO m => AudioTime -> AudioTime -> Double -> AudioTime -> AudioTime -> NodeRef -> SynthDef m NodeRef
+ampEnv a d s st r input = do
+ g <- gain 0.0 input
+ linearRampOnParam Gain 1.0 a g
+ exponentialRampOnParam Gain s (a+d) g
+ setParam Gain s (a+d+st) g
+ linearRampOnParam Gain 0.0 (a+d+st+r) g
+
+asr :: AudioIO m => AudioTime -> AudioTime -> AudioTime -> Double -> NodeRef -> SynthDef m NodeRef
+asr a s r amp input = do
+ g <- gain 0.0 input
+ linearRampOnParam Gain amp a g
+ setParam Gain amp (a+s) g
+ linearRampOnParam Gain 0 (a+s+r) g
+
+rectEnv :: AudioIO m => AudioTime -> AudioTime -> Double -> NodeRef -> SynthDef m NodeRef
+rectEnv ar s amp = asr ar s ar amp
+
+unitRectEnv :: AudioIO m => AudioTime-> AudioTime -> NodeRef -> SynthDef m NodeRef
+unitRectEnv ar s = asr ar s ar 1
diff --git a/src/Sound/MusicW/FloatArraySpec.hs b/src/Sound/MusicW/FloatArraySpec.hs
new file mode 100644
--- /dev/null
+++ b/src/Sound/MusicW/FloatArraySpec.hs
@@ -0,0 +1,57 @@
+{-# LANGUAGE CPP #-}
+module Sound.MusicW.FloatArraySpec (
+ FloatArraySpec(..),
+ arraySpecMap,
+ arraySpecSize,
+ listToArraySpec
+) where
+
+#if MIN_VERSION_base(4,9,0)
+import Data.Semigroup as Semi
+#endif
+#if !(MIN_VERSION_base(4,8,0))
+import Data.Monoid
+#endif
+
+data FloatArraySpec
+ = EmptyArray
+ | Const Int Double FloatArraySpec
+ | Segment [Double] FloatArraySpec
+ | Repeated Int [Double] FloatArraySpec
+ deriving (Show)
+
+mappendFloatArraySpec :: FloatArraySpec -> FloatArraySpec -> FloatArraySpec
+mappendFloatArraySpec EmptyArray x = x
+mappendFloatArraySpec x EmptyArray = x
+mappendFloatArraySpec (Const i x tl) y = Const i x $ mappendFloatArraySpec tl y
+mappendFloatArraySpec (Segment xs tl) y = Segment xs $ mappendFloatArraySpec tl y
+mappendFloatArraySpec (Repeated i xs tl) y = Repeated i xs $ mappendFloatArraySpec tl y
+
+#if MIN_VERSION_base(4,9,0)
+instance Semi.Semigroup FloatArraySpec where
+ (<>) = mappendFloatArraySpec
+#endif
+
+instance Monoid FloatArraySpec where
+ mempty = EmptyArray
+#if MIN_VERSION_base(4,11,0)
+#elif MIN_VERSION_base(4,9,0)
+ mappend = (Semi.<>)
+#else
+ mappend = mappendFloatArraySpec
+#endif
+
+arraySpecMap :: (Double -> Double) -> FloatArraySpec -> FloatArraySpec
+arraySpecMap _ EmptyArray = EmptyArray
+arraySpecMap f (Const i x tl)= Const i (f x) $ arraySpecMap f tl
+arraySpecMap f (Segment xs tl) = Segment (fmap f xs) $ arraySpecMap f tl
+arraySpecMap f (Repeated i xs tl) = Repeated i (fmap f xs) $ arraySpecMap f tl
+
+arraySpecSize :: FloatArraySpec -> Int
+arraySpecSize EmptyArray = 0
+arraySpecSize (Const i _ tl) = i + arraySpecSize tl
+arraySpecSize (Segment xs tl) = (length xs) + arraySpecSize tl
+arraySpecSize (Repeated i xs tl) = (i * (length xs)) + arraySpecSize tl
+
+listToArraySpec :: [Double] -> FloatArraySpec
+listToArraySpec xs = Segment xs EmptyArray
diff --git a/src/Sound/MusicW/Node.hs b/src/Sound/MusicW/Node.hs
new file mode 100644
--- /dev/null
+++ b/src/Sound/MusicW/Node.hs
@@ -0,0 +1,478 @@
+{-# LANGUAGE JavaScriptFFI #-}
+module Sound.MusicW.Node where
+
+import GHCJS.Types
+import GHCJS.Marshal.Pure
+import GHCJS.Prim (toJSArray,toJSString)
+import GHCJS.Foreign.Callback(Callback, asyncCallback1, releaseCallback)
+import Control.Monad.IO.Class
+
+import Sound.MusicW.AudioContext
+import Sound.MusicW.AudioBuffer
+import Sound.MusicW.FloatArraySpec
+
+-- | A Node is an instantiated and wrapped node from the Web Audio API, or it is
+-- a settable parameter of such a node. Nodes can potentially be connected and
+-- disconnected to/from each other, started, stopped, and can have values/ramps/curves
+-- scheduled on their parameters.
+
+newtype Node = Node JSVal
+
+instance PToJSVal Node where pToJSVal (Node j) = j
+
+instance PFromJSVal Node where pFromJSVal = Node
+
+instance Show Node where show _ = "a Node"
+
+data ParamType
+ = Frequency
+ | Gain
+ | Q
+ | DelayTime
+ | Threshold
+ | Knee
+ | CompressionRatio
+ | Attack
+ | Release
+ -- obviously more are needed here...
+
+instance Show ParamType where
+ show Frequency = "frequency"
+ show Gain = "gain"
+ show Q = "Q"
+ show DelayTime = "delayTime"
+ show Threshold = "threshold"
+ show Knee = "knee"
+ show CompressionRatio = "ratio"
+ show Attack = "attack"
+ show Release = "release"
+
+createConstantSource :: AudioIO m => Double -> m Node
+createConstantSource v = do
+ ctx <- audioContext
+ node <- liftIO $ js_createConstantSource ctx
+ liftIO $ js_setConstantOffset node v
+ setNodeField node "isSource" True
+ setNodeField node "isSink" False
+ setNodeField node "startable" True
+
+data OscillatorType
+ = Sine
+ | Square
+ | Sawtooth
+ | Triangle
+ deriving (Show, Eq)
+
+instance PToJSVal OscillatorType where
+ pToJSVal Sine = pToJSVal "sine"
+ pToJSVal Square = pToJSVal "square"
+ pToJSVal Sawtooth = pToJSVal "sawtooth"
+ pToJSVal Triangle = pToJSVal "triangle"
+
+createOscillator :: AudioIO m => OscillatorType -> Double -> m Node
+createOscillator t f = do
+ ctx <- audioContext
+ node <- liftIO $ js_createOscillator ctx
+ setNodeField node "type" t
+ setFrequency node f
+ setNodeField node "isSource" True
+ setNodeField node "isSink" False
+ temp <- setNodeField node "startable" True
+ return temp
+
+data BufferParams = BufferParams Double Double Bool deriving (Show, Eq)
+
+createAudioBufferSource :: AudioIO m => AudioBuffer -> BufferParams -> m Node
+createAudioBufferSource buf params@(BufferParams loopstart loopend loop) = do
+ ctx <- audioContext
+ node <- liftIO $ js_createBufferSource ctx
+ setNodeField node "buffer" buf
+ setNodeField node "loopstart" loopstart
+ setNodeField node "loopend" loopend
+ setNodeField node "loop" loop
+ setNodeField node "isSource" True
+ setNodeField node "isSink" False
+ setNodeField node "startable" True
+
+data FilterSpec -- first argument always frequency, second argument when two is q or gain, when three: frequency q gain
+ = LowPass Double Double
+ | HighPass Double Double
+ | BandPass Double Double
+ | LowShelf Double Double
+ | HighShelf Double Double
+ | Peaking Double Double Double
+ | Notch Double Double
+ | AllPass Double Double
+ deriving (Show)
+
+-- temp note: filter types: LowPass, HighPass, BandPass,LowShelf,HighShelf,Peaking,Notch,AllPass
+createBiquadFilter :: AudioIO m => FilterSpec -> m Node
+createBiquadFilter spec = do
+ ctx <- audioContext
+ node <- liftIO $ js_createBiquadFilter ctx
+ configureBiquadFilter spec node
+ setNodeField node "isSource" True
+ setNodeField node "isSink" True
+ setNodeField node "startable" False
+
+configureBiquadFilter :: AudioIO m => FilterSpec -> Node -> m Node
+configureBiquadFilter (LowPass f q) n = setNodeField n "type" "lowpass" >> setFrequency n f >> setQ n q
+configureBiquadFilter (HighPass f q) n = setNodeField n "type" "highpass" >> setFrequency n f >> setQ n q
+configureBiquadFilter (BandPass f q) n = setNodeField n "type" "bandpass" >> setFrequency n f >> setQ n q
+configureBiquadFilter (LowShelf f g) n = setNodeField n "type" "lowshelf" >> setFrequency n f >> setGain n g
+configureBiquadFilter (HighShelf f g) n = setNodeField n "type" "highshelf" >> setFrequency n f >> setGain n g
+configureBiquadFilter (Peaking f q g) n = setNodeField n "type" "peaking" >> setFrequency n f >> setQ n q >> setGain n g
+configureBiquadFilter (Notch f q) n = setNodeField n "type" "notch" >> setFrequency n f >> setQ n q
+configureBiquadFilter (AllPass f q) n = setNodeField n "type" "allpass" >> setFrequency n f >> setQ n q
+
+createConvolver :: AudioIO m => Either Float32Array FloatArraySpec -> Bool -> m Node
+createConvolver bufferSpec normalize = do
+ ctx <- audioContext
+ node <- liftIO $ js_createConvolver ctx
+ sr <- sampleRate
+ bufferData <- liftIO $ instantiateArraySpec bufferSpec
+ nSamples <- liftIO $ js_typedArrayLength bufferData
+ buffer <- liftIO $ js_createAudioBuffer 1 nSamples sr ctx -- TODO (?) use a buffer spec instead of array spec (???)
+ liftIO $ js_copyToChannel bufferData 1 buffer
+ setNodeField node "buffer" buffer
+ setNodeField node "normalize" normalize
+ setNodeField node "isSource" True
+ setNodeField node "isSink" True
+ setNodeField node "startable" False
+
+createDelay :: AudioIO m => AudioTime -> m Node
+createDelay maxT = do
+ ctx <- audioContext
+ node <- liftIO $ js_createDelay ctx maxT
+ setValue node DelayTime maxT
+ setNodeField node "isSource" True
+ setNodeField node "isSink" True
+ setNodeField node "startable" False
+
+createCompressor :: AudioIO m => Double -> Double -> Double -> AudioTime -> AudioTime -> m Node
+createCompressor thr kne rat att rel = do
+ ctx <- audioContext
+ node <- liftIO $ js_createDynamicsCompressor ctx
+ setValue node Threshold thr
+ setValue node Knee kne
+ setValue node CompressionRatio rat
+ setValue node Attack att
+ setValue node Release rel
+ setNodeField node "isSource" True
+ setNodeField node "isSink" True
+ setNodeField node "startable" False
+
+createGain :: AudioIO m => Double -> m Node
+createGain g = do
+ ctx <- audioContext
+ node <- liftIO $ js_createGain ctx
+ setValue node Gain g
+ setNodeField node "isSource" True
+ setNodeField node "isSink" True
+ setNodeField node "startable" False
+
+createChannelMerger :: AudioIO m => Int -> m Node
+createChannelMerger nChnls = do
+ ctx <- audioContext
+ node <- liftIO $ js_createChannelMerger ctx nChnls
+ setNodeField node "isSource" True
+ setNodeField node "isSink" True
+ setNodeField node "startable" False
+
+data OversampleAmount
+ = NoOversampling
+ | X2Oversampling
+ | X4Oversampling
+ deriving (Show)
+
+instance PToJSVal OversampleAmount where
+ pToJSVal NoOversampling = pToJSVal "none"
+ pToJSVal X2Oversampling = pToJSVal "x2"
+ pToJSVal X4Oversampling = pToJSVal "x4"
+
+createWaveShaper :: AudioIO m => Either Float32Array FloatArraySpec -> OversampleAmount -> m Node
+createWaveShaper curve oversample = do
+ ctx <- audioContext
+ node <- liftIO $ js_createWaveShaper ctx
+ curveArray <- liftIO $ instantiateArraySpec curve
+ setNodeField node "curve" curveArray
+ setNodeField node "oversample" oversample
+ setNodeField node "isSource" True
+ setNodeField node "isSink" True
+ setNodeField node "startable" False
+
+createScriptProcessor :: AudioIO m => Int -> Int -> (JSVal -> IO ()) -> m Node
+createScriptProcessor inChnls outChnls cb = do
+ ctx <- audioContext
+ node <- liftIO $ js_createScriptProcessor ctx inChnls outChnls
+ onaudioprocess <- liftIO $ asyncCallback1 cb
+ liftIO $ js_onaudioprocess node onaudioprocess
+ liftIO $ releaseCallback onaudioprocess
+ setNodeField node "isSource" True
+ setNodeField node "isSink" True
+ setNodeField node "startable" True
+
+-- | There is no function in the Web Audio API to "create" the context's
+-- destination but we provide one anyway, as a convenient way to get a node
+-- that, like all the other nodes, can be used in connections.
+
+createDestination :: AudioIO m => m Node
+createDestination = do
+ node <- Node <$> destination
+ setNodeField node "isSource" False
+ setNodeField node "isSink" True
+ setNodeField node "startable" False
+
+createMediaStreamDestination :: AudioIO m => m Node
+createMediaStreamDestination = do
+ ctx <- audioContext
+ node <- liftIO $ js_createMediaStreamDestination ctx
+ setNodeField node "isSource" False
+ setNodeField node "isSink" True
+ setNodeField node "startable" False
+
+getSharedMediaStreamDestination :: AudioIO m => m Node
+getSharedMediaStreamDestination = do
+ ctx <- audioContext
+ node <- liftIO $ js_getContextSharedMediaStreamDestination ctx
+ setNodeField node "isSource" False
+ setNodeField node "isSink" True
+ setNodeField node "startable" False
+
+-- | Similarly, while the control parameters of nodes in the web audio API are distinct
+-- we provide a function here to create a pseudo-node from a parameter of an
+-- existing node. As with the destination (above), a node parameter, like a node,
+-- can be something to which connections are made.
+
+createParameter :: MonadIO m => Node -> ParamType -> m Node
+createParameter node pType = do
+ let p = Node $ js_audioParam node (pToJSVal $ show pType)
+ setNodeField p "isSource" False
+ setNodeField p "isSink" True
+ setNodeField p "startable" False
+
+connectNodes :: MonadIO m => Node -> Node -> m ()
+connectNodes from to
+ | not (js_isSource from) = error $ (show from) ++ " can't be connect source."
+ | not (js_isSink to) = error $ (show to) ++ " can't be connect target."
+ | otherwise = liftIO $ js_connect from to
+
+connectNodes' :: MonadIO m => Node -> Int -> Node -> Int -> m ()
+connectNodes' fromNode fromChannel toNode toChannel
+ | not (js_isSource fromNode) = error $ (show fromNode) ++ " can't be connect source."
+ | not (js_isSink toNode) = error $ (show toNode) ++ " can't be connect target."
+ | otherwise = liftIO $ js_connect' fromNode toNode fromChannel toChannel
+
+disconnectNodes :: MonadIO m => Node -> Node -> m ()
+disconnectNodes from to
+ | not (js_isSource from) = error $ (show from) ++ " can't be disconnect source."
+ | not (js_isSink to) == False = error $ (show to) ++ " can't be disconnect target."
+ | otherwise = liftIO $ js_disconnect from to
+
+disconnectAll :: MonadIO m => Node -> m ()
+disconnectAll x
+ | not (js_isSource x) = return ()
+ | otherwise = liftIO $ js_disconnectAll x
+
+startNode :: MonadIO m => AudioTime -> Node -> m ()
+startNode t x
+ | js_startable x = liftIO $ js_start x t
+ | otherwise = return ()
+
+stopNode :: MonadIO m => AudioTime -> Node -> m ()
+stopNode t x
+ | js_startable x = liftIO $ js_stop x t
+ | otherwise = return ()
+
+stopNodeNow :: MonadIO m => Node -> m ()
+stopNodeNow x
+ | js_startable x = liftIO $ js_stopNow x
+ | otherwise = return ()
+
+isSourceNode :: Node -> Bool
+isSourceNode n = js_isSource n && (not $ js_isSink n)
+
+isSinkNode :: Node -> Bool
+isSinkNode n = js_isSink n && (not $ js_isSource n)
+
+
+-- Definitions used to set/schedule the values of fields and parameters of nodes
+
+setNodeField :: (MonadIO m, PToJSVal a) => Node -> String -> a -> m Node
+setNodeField node field val = do
+ liftIO $ js_setField (pToJSVal node) (pToJSVal field) (pToJSVal val)
+ return node
+
+setFrequency :: AudioIO m => Node -> Double -> m Node
+setFrequency node = setValue node Frequency
+
+setGain :: AudioIO m => Node -> Double -> m Node
+setGain node = setValue node Gain
+
+setQ :: AudioIO m => Node -> Double -> m Node
+setQ node = setValue node Q
+
+setValue :: AudioIO m => Node -> ParamType -> Double -> m Node
+setValue node pType value = audioTime >>= setValueAtTime node pType value
+
+setValueAtTime :: MonadIO m => Node -> ParamType -> Double -> AudioTime -> m Node
+setValueAtTime node pType value time = do
+ liftIO $ js_setValueAtTime node (pToJSVal $ show pType) value time
+ return node
+
+linearRampToValueAtTime :: MonadIO m => Node -> ParamType -> Double -> AudioTime -> m Node
+linearRampToValueAtTime node pType value time = do
+ liftIO $ js_linearRampToValueAtTime node (pToJSVal $ show pType) value time
+ return node
+
+exponentialRampToValueAtTime :: MonadIO m => Node -> ParamType -> Double -> AudioTime -> m Node
+exponentialRampToValueAtTime node pType value time = do
+ liftIO $ js_exponentialRampToValueAtTime node (pToJSVal $ show pType) value time
+ return node
+
+setValueCurveAtTime :: MonadIO m => Node -> ParamType -> [Double] -> AudioTime -> AudioTime -> m Node
+setValueCurveAtTime node pType curve startTime duration = do
+ curveArray <- liftIO $ toJSArray $ fmap pToJSVal curve
+ typedCurveArray <- liftIO $ js_typedArrayFromArray curveArray
+ liftIO $ js_setValueCurveAtTime node (pToJSVal $ show pType) typedCurveArray startTime duration
+ return node
+
+onended :: Node -> (JSVal -> IO ()) -> IO ()
+onended n cb = do
+ let n' = pToJSVal n
+ onend <- asyncCallback1 $ \_ -> cb n'
+ js_onended n onend
+ releaseCallback onend
+
+
+-- JS FFI functions (required, but not exported from this module):
+
+foreign import javascript unsafe
+ "$1.createConstantSource()"
+ js_createConstantSource :: AudioContext -> IO Node
+
+foreign import javascript unsafe
+ "$1.createOscillator()"
+ js_createOscillator :: AudioContext -> IO Node
+
+foreign import javascript unsafe
+ "$1.createBufferSource()"
+ js_createBufferSource :: AudioContext -> IO Node
+
+foreign import javascript unsafe
+ "$1.createBiquadFilter()"
+ js_createBiquadFilter :: AudioContext -> IO Node
+
+foreign import javascript unsafe
+ "$1.createConvolver()"
+ js_createConvolver :: AudioContext -> IO Node
+
+foreign import javascript unsafe
+ "$1.createDelay($2)"
+ js_createDelay :: AudioContext -> AudioTime -> IO Node
+
+foreign import javascript unsafe
+ "$1.createDynamicsCompressor()"
+ js_createDynamicsCompressor :: AudioContext -> IO Node
+
+foreign import javascript unsafe
+ "$1.createGain()"
+ js_createGain :: AudioContext -> IO Node
+
+foreign import javascript unsafe
+ "$1.createChannelMerger($2)"
+ js_createChannelMerger :: AudioContext -> Int -> IO Node
+
+foreign import javascript unsafe
+ "$1.createWaveShaper()"
+ js_createWaveShaper :: AudioContext -> IO Node
+
+foreign import javascript unsafe
+ "$1.createScriptProcessor(void 0, $2, $3)"
+ js_createScriptProcessor :: AudioContext -> Int -> Int -> IO Node
+
+foreign import javascript unsafe
+ "$1.createMediaStreamDestination()"
+ js_createMediaStreamDestination :: AudioContext -> IO Node
+
+foreign import javascript unsafe
+ "if ($1.___stream == null) {\
+ \ $1.___stream = $1.createMediaStreamDestination(); \
+ \} $r = $1.___stream;"
+ js_getContextSharedMediaStreamDestination :: AudioContext -> IO Node
+
+foreign import javascript unsafe
+ "$1.connect($2);"
+ js_connect :: Node -> Node -> IO ()
+
+foreign import javascript unsafe
+ "$1.connect($2,$3,$4);"
+ js_connect' :: Node -> Node -> Int -> Int -> IO ()
+
+foreign import javascript unsafe
+ "$1.disconnect($2);"
+ js_disconnect :: Node -> Node -> IO ()
+
+foreign import javascript unsafe
+ "$1.disconnect();"
+ js_disconnectAll :: Node -> IO ()
+
+foreign import javascript unsafe
+ "$1.start($2);"
+ js_start :: Node -> AudioTime -> IO ()
+
+foreign import javascript unsafe
+ "$1.stop($2);"
+ js_stop :: Node -> AudioTime -> IO ()
+
+foreign import javascript unsafe
+ "$1.stop();"
+ js_stopNow :: Node -> IO ()
+
+foreign import javascript unsafe
+ "$1.onaudioprocess = $2;"
+ js_onaudioprocess :: Node -> Callback (JSVal -> IO ()) -> IO ()
+
+foreign import javascript unsafe
+ "$1[$2].setValueAtTime($3, $4);"
+ js_setValueAtTime :: Node -> JSVal -> Double -> Double -> IO ()
+
+foreign import javascript unsafe
+ "$1[$2].linearRampToValueAtTime($3, $4);"
+ js_linearRampToValueAtTime :: Node -> JSVal -> Double -> AudioTime -> IO ()
+
+foreign import javascript unsafe
+ "$1[$2].exponentialRampToValueAtTime($3, $4);"
+ js_exponentialRampToValueAtTime :: Node -> JSVal -> Double -> AudioTime -> IO ()
+
+foreign import javascript unsafe
+ "$1[$2].setValueCurveAtTime($3, $4, $5);"
+ js_setValueCurveAtTime :: Node -> JSVal -> Float32Array -> Double -> AudioTime -> IO ()
+
+foreign import javascript unsafe
+ "$1[$2] = $3;"
+ js_setField :: JSVal -> JSVal -> JSVal -> IO ()
+
+foreign import javascript unsafe
+ "$1.offset.value = $2"
+ js_setConstantOffset :: Node -> Double -> IO ()
+
+foreign import javascript unsafe
+ "$1[$2]"
+ js_audioParam :: Node -> JSVal -> JSVal
+
+foreign import javascript unsafe
+ "$1.onended = $2;"
+ js_onended :: Node -> Callback (JSVal -> IO ()) -> IO ()
+
+foreign import javascript unsafe
+ "$1.isSource"
+ js_isSource :: Node -> Bool
+
+foreign import javascript unsafe
+ "$1.isSink"
+ js_isSink :: Node -> Bool
+
+foreign import javascript unsafe
+ "$1.startable"
+ js_startable :: Node -> Bool
diff --git a/src/Sound/MusicW/Synth.hs b/src/Sound/MusicW/Synth.hs
new file mode 100644
--- /dev/null
+++ b/src/Sound/MusicW/Synth.hs
@@ -0,0 +1,109 @@
+module Sound.MusicW.Synth (
+ Synth(..),
+ playSynth,
+ playSynthNow,
+ nodeRefToNode,
+ synthDefToSynth,
+ synthDefToSynth_,
+ startSynth,
+ startSynthNow,
+ stopSynth,
+ stopSynthNow,
+ disconnectSynth,
+ restartSynth
+ ) where
+
+import Data.Foldable (find)
+import Control.Monad (void)
+import Control.Monad.IO.Class
+
+import Sound.MusicW.AudioContext
+import Sound.MusicW.Node
+import Sound.MusicW.SynthDef
+
+data Synth m = Synth {
+ cachedDestination :: Node,
+ spec :: SynthSpec m,
+ nodes :: [Node]
+ --audioBuffers :: Map Int AudioBuffer, -- TODO restarting a AudioBufferSourceNode needs to replace the buffers
+ } deriving (Show)
+
+playSynth :: AudioIO m => Node -> AudioTime -> SynthDef m a -> m (a, Synth m)
+playSynth dest t x = do
+ (a,spec) <- runSynthDef x
+ s <- synthSpecToSynth dest spec
+ startSynth t s
+ return (a,s)
+
+playSynthNow :: AudioIO m => Node -> SynthDef m a -> m (a, Synth m)
+playSynthNow dest x = do
+ (a,spec) <- runSynthDef x
+ s <- synthSpecToSynth dest spec
+ startSynthNow s
+ return (a,s)
+
+nodeRefToNode :: AudioIO m => NodeRef -> Synth m -> m Node
+nodeRefToNode (NodeRef i (_,_)) s = return $ (nodes s)!!i
+nodeRefToNode (ParamRef i pType) s = createParameter ((nodes s)!!i) pType
+nodeRefToNode DestinationRef s = return $ cachedDestination s
+
+synthDefToSynth :: AudioIO m => Node -> SynthDef m a -> m (Synth m)
+synthDefToSynth dest x = execSynthDef x >>= synthSpecToSynth dest
+
+synthDefToSynth_ :: AudioIO m => SynthDef m a -> m (Synth m)
+synthDefToSynth_ x = createDestination >>= (flip synthDefToSynth) x
+
+synthSpecToSynth :: AudioIO m => Node -> SynthSpec m -> m (Synth m)
+synthSpecToSynth dest x = do
+ ns <- sequence $ nodeBuilders x
+ mapM_ (uncurry (makeConnections dest ns)) $ connections x
+ disconnectOnStop ns
+ return $ Synth { cachedDestination = dest, spec = x, nodes = ns }
+
+makeConnections :: AudioIO m => Node -> [Node] -> NodeRef -> NodeRef -> m ()
+makeConnections dest ns (NodeRef from (_,_)) DestinationRef = connectNodes (ns!!from) dest
+makeConnections _ ns (NodeRef from (_,_)) (NodeRef to (_,_)) = connectNodes (ns!!from) (ns!!to)
+makeConnections _ ns (NodeRef from (_,_)) (ParamRef to pType) = createParameter (ns!!to) pType >>= connectNodes (ns!!from)
+makeConnections _ ns (NodeOutputRef fromNode fromChannel) (NodeInputRef toNode toChannel) = connectNodes' (ns!!fromNode) fromChannel (ns!!toNode) toChannel
+makeConnections _ _ _ _ = error "Malformed graph structure."
+
+-- *** Note: there is probably a bug connected to the definition of disconnectOnStop below:
+-- it attaches an onended callback to a single source node from a list of nodes, which doesn't
+-- properly cover the case where there are multiple source nodes that end at different times.
+
+disconnectOnStop :: (Foldable t, AudioIO m) => t Node -> m ()
+disconnectOnStop ns = maybe (return ()) f $ find isSourceNode ns
+ where f x = liftIO $ onended x $ \_ -> mapM_ disconnectAll ns
+
+startSynth :: AudioIO m => AudioTime -> Synth m -> m ()
+startSynth t0 s = do
+ mapM_ (startNode t0) $ nodes s
+ maybe (return ()) (\t -> stopSynth (t0+t) s) $ deletionTime (spec s)
+ mapM_ (scheduleChange (nodes s) t0) $ changes (spec s)
+
+scheduleChange :: AudioIO m => [Node] -> AudioTime -> Change -> m ()
+scheduleChange ns t0 (SetValue (ParamRef i pType) v t) = void $ setValueAtTime (ns!!i) pType v (t0+t)
+scheduleChange ns t0 (LinearRampToValue (ParamRef i pType) v t) = void $ linearRampToValueAtTime (ns!!i) pType v (t0+t)
+scheduleChange ns t0 (ExponentialRampToValue (ParamRef i pType) v t) = void $ exponentialRampToValueAtTime (ns!!i) pType v (t0+t)
+scheduleChange ns t0 (CurveToValue (ParamRef i pType) curve t dur) = void $ setValueCurveAtTime (ns!!i) pType curve (t0+t) dur
+scheduleChange _ _ _ = error "scheduleChange targeted non-ParamRef node"
+
+startSynthNow :: AudioIO m => Synth m -> m ()
+startSynthNow s = do
+ t <- audioTime
+ startSynth (t + 0.050) s
+
+stopSynth :: MonadIO m => AudioTime -> Synth m -> m ()
+stopSynth t s = mapM_ (stopNode t) $ nodes s
+
+stopSynthNow :: MonadIO m => Synth m -> IO ()
+stopSynthNow s = mapM_ stopNodeNow $ nodes s
+
+disconnectSynth :: MonadIO m => Synth m -> IO ()
+disconnectSynth s = mapM_ disconnectAll $ nodes s
+
+restartSynth :: AudioIO m => AudioTime -> Synth m -> m ()
+restartSynth t s = do
+ stopSynth t s
+ s' <- synthSpecToSynth (cachedDestination s) (spec s)
+ startSynth t s'
diff --git a/src/Sound/MusicW/SynthDef.hs b/src/Sound/MusicW/SynthDef.hs
new file mode 100644
--- /dev/null
+++ b/src/Sound/MusicW/SynthDef.hs
@@ -0,0 +1,214 @@
+module Sound.MusicW.SynthDef where
+
+import Control.Monad.State
+import GHCJS.Types
+
+import Sound.MusicW.AudioContext
+import Sound.MusicW.FloatArraySpec
+import Sound.MusicW.AudioBuffer
+import Sound.MusicW.Node
+
+data NodeRef
+ = NodeRef Int (Int,Int) -- tuplet is number of input and output channels for this node
+ | NodeInputRef Int Int -- for a numbered node, a specific numbered input of that node
+ | NodeOutputRef Int Int -- for a numbered node, a specific numbered input of that node
+ | ParamRef Int ParamType
+ | DestinationRef
+ deriving (Show)
+
+nodeRefInputCount :: NodeRef -> Int
+nodeRefInputCount (NodeRef _ (i,_)) = i
+nodeRefInputCount (NodeInputRef _ _) = 1
+nodeRefInputCount (NodeOutputRef _ _) = 0
+nodeRefInputCount (ParamRef _ _) = 1
+nodeRefInputCount DestinationRef = 2 -- hard-coding of stereo output here might be problematic or irrelevant...
+
+nodeRefOutputCount :: NodeRef -> Int
+nodeRefOutputCount (NodeRef _ (_,o)) = o
+nodeRefOutputCount (NodeInputRef _ _) = 0
+nodeRefOutputCount (NodeOutputRef _ _) = 1
+nodeRefOutputCount (ParamRef _ _) = 0
+nodeRefOutputCount DestinationRef = 0
+
+data Change
+ = SetValue { paramRef :: NodeRef , value :: Double, endTime :: AudioTime }
+ | LinearRampToValue { paramRef :: NodeRef , value :: Double, endTime :: AudioTime }
+ | ExponentialRampToValue { paramRef :: NodeRef, value :: Double, endTime :: AudioTime }
+ | CurveToValue { paramRef :: NodeRef, values :: [Double], startTime :: AudioTime, duration :: AudioTime }
+ deriving (Show)
+
+data SynthSpec m = SynthSpec {
+ nodeBuilders :: [m Node],
+ connections :: [(NodeRef,NodeRef)],
+ changes :: [Change],
+ deletionTime :: Maybe AudioTime
+ }
+
+instance Show (SynthSpec m) where
+ show x = show (length $ nodeBuilders x) ++ " nodes, connections=" ++ show (connections x)
+ ++ ", changes=" ++ show (changes x) ++ ", deletionTime=" ++ show (deletionTime x)
+
+emptySynthSpec :: SynthSpec m
+emptySynthSpec = SynthSpec {
+ nodeBuilders = [],
+ connections = [],
+ changes = [],
+ deletionTime = Nothing
+ }
+
+type SynthDef m a = StateT (SynthSpec m) m a
+
+execSynthDef :: AudioIO m => SynthDef m a -> m (SynthSpec m)
+execSynthDef x = execStateT x emptySynthSpec
+
+runSynthDef :: AudioIO m => SynthDef m a -> m (a, SynthSpec m)
+runSynthDef x = runStateT x emptySynthSpec
+
+addNodeBuilder :: Monad m => (Int,Int) -> m Node -> SynthDef m NodeRef
+addNodeBuilder (iCount,oCount) x = do
+ indexOfNewNode <- gets (length . nodeBuilders)
+ modify $ \s -> s { nodeBuilders = nodeBuilders s ++ [x] }
+ return $ NodeRef indexOfNewNode (iCount,oCount)
+
+connect :: Monad m => NodeRef -> NodeRef -> SynthDef m ()
+connect from to = modify $ \s -> s { connections = connections s ++ [(from,to)] }
+
+connect' :: Monad m => NodeRef -> Int -> NodeRef -> Int -> SynthDef m ()
+connect' (NodeRef fromNode (_,_)) fromIndex (NodeRef toNode (_,_)) toIndex = connect (NodeOutputRef fromNode fromIndex) (NodeInputRef toNode toIndex)
+connect' _ _ _ _ = error "unsupported connection type in connect'"
+
+addChange :: Monad m => Change -> SynthDef m ()
+addChange x = modify $ \s -> s { changes = changes s ++ [x] }
+
+setDeletionTime :: Monad m => Maybe AudioTime -> SynthDef m ()
+setDeletionTime t = modify $ \s -> s { deletionTime = combineDeletionTimes (deletionTime s) t }
+
+combineDeletionTimes :: Maybe AudioTime -> Maybe AudioTime -> Maybe AudioTime
+combineDeletionTimes Nothing Nothing = Nothing
+combineDeletionTimes (Just t) Nothing = Just t
+combineDeletionTimes Nothing (Just t) = Just t
+combineDeletionTimes (Just t1) (Just t2) = Just (max t1 t2)
+
+
+-- definitions for nodes that are only sources (no NodeRefs as arguments)
+
+constantSource :: AudioIO m => Double -> SynthDef m NodeRef
+constantSource x = addNodeBuilder (0,1) $ createConstantSource x
+
+oscillator :: AudioIO m => OscillatorType -> Double -> SynthDef m NodeRef
+oscillator t f = addNodeBuilder (0,1) $ createOscillator t f
+
+audioBufferSource :: AudioIO m => AudioBuffer -> BufferParams -> SynthDef m NodeRef
+audioBufferSource buf ps = addNodeBuilder (0,1) $ createAudioBufferSource buf ps -- *** hard-coding of 1 output channel could become problematic
+
+-- for the following definitions, relating to nodes that are sinks, the penultimate
+-- type for each is a NodeRef, so that Synth computations can be chained together
+-- (x >>= y >>= z) in such a way that the node of x becomes an input to y, whose node
+-- becomes an input to z.
+
+biquadFilter :: AudioIO m => FilterSpec -> NodeRef -> SynthDef m NodeRef
+biquadFilter x input = do
+ let nchnls = nodeRefOutputCount input
+ y <- addNodeBuilder (nchnls,nchnls) $ createBiquadFilter x
+ connect input y
+ return y
+
+gain :: AudioIO m => Double -> NodeRef -> SynthDef m NodeRef
+gain x input = do
+ let nchnls = nodeRefOutputCount input
+ y <- addNodeBuilder (nchnls,nchnls) $ createGain x
+ connect input y
+ return y
+
+channelMerger :: AudioIO m => [NodeRef] -> SynthDef m NodeRef
+channelMerger xs = do
+ y <- addNodeBuilder (length xs,length xs) $ createChannelMerger (length xs)
+ zipWithM_ (\x i -> connect' x 0 y i) xs [0..]
+ return y
+
+-- note: channelSplitter does not actually create any new synthesis nodes
+-- it just turns all of the output channels of a node with outputs into
+-- individual node references.
+channelSplitter :: AudioIO m => NodeRef -> SynthDef m [NodeRef]
+channelSplitter (NodeOutputRef n o) = return [NodeOutputRef n o]
+channelSplitter (NodeRef n (_,oChnls)) = return $ fmap (NodeOutputRef n) [0 .. (oChnls-1)]
+channelSplitter _ = error "MusicW: channelSplitter called on NodeInputRef ParamRef or DestinationRef"
+
+convolver :: AudioIO m => Either Float32Array FloatArraySpec -> Bool -> NodeRef -> SynthDef m NodeRef
+convolver spec normalize input = do
+ let nchnls = nodeRefOutputCount input
+ y <- addNodeBuilder (nchnls,nchnls) $ createConvolver spec normalize
+ connect input y
+ return y
+
+delay :: AudioIO m => AudioTime -> NodeRef -> SynthDef m NodeRef
+delay maxT input = do
+ let nchnls = nodeRefOutputCount input
+ y <- addNodeBuilder (nchnls,nchnls) $ createDelay maxT
+ connect input y
+ return y
+
+compressor :: AudioIO m => Double -> Double -> Double -> AudioTime -> AudioTime -> NodeRef -> SynthDef m NodeRef
+compressor thr kne rat att rel input = do
+ let nchnls = nodeRefOutputCount input
+ y <- addNodeBuilder (nchnls,nchnls) $ createCompressor thr kne rat att rel
+ connect input y
+ return y
+
+waveShaper :: AudioIO m => Either Float32Array FloatArraySpec -> OversampleAmount -> NodeRef -> SynthDef m NodeRef
+waveShaper curve oversample input = do
+ let nchnls = nodeRefOutputCount input
+ y <- addNodeBuilder (nchnls,nchnls) $ createWaveShaper curve oversample
+ connect input y
+ return y
+
+scriptProcessor :: AudioIO m => Int -> Int -> (JSVal -> IO ()) -> NodeRef -> SynthDef m NodeRef
+scriptProcessor inChnls outChnls cb input = do
+ y <- addNodeBuilder (inChnls,outChnls) $ createScriptProcessor inChnls outChnls cb
+ connect input y
+ return y
+
+audioOut :: AudioIO m => NodeRef -> SynthDef m ()
+audioOut input = connect input DestinationRef
+
+audioIn :: AudioIO m => SynthDef m NodeRef
+audioIn = addNodeBuilder (0,1) $ createGain 1.0 -- TODO: hard-coded single input channel will be problematic later
+
+resink :: AudioIO m => NodeRef -> NodeRef -> SynthDef m NodeRef
+resink target input = connect input target >> return target
+
+mix :: AudioIO m => [NodeRef] -> SynthDef m NodeRef
+mix [] = constantSource 0 -- placeholder: we should have some kind of null node that translates into nothing for cases like this
+mix (x:xs) = do
+ y <- gain 1.0 x
+ mapM (\n -> connect n y) xs
+ return y
+
+mixSynthDefs :: AudioIO m => [SynthDef m NodeRef] -> SynthDef m NodeRef
+mixSynthDefs xs = sequence xs >>= mix
+
+-- The final set of definitions here have to do with either connecting signals
+-- to parameters of existing nodes, or setting/scheduling value changes/envelopes
+-- on the parameters of existing nodes. The order of arguments is somewhat
+-- inconsistent but is intended to facilitate common use cases where these
+-- definitions are chained together.
+
+param :: AudioIO m => ParamType -> NodeRef -> NodeRef -> SynthDef m ()
+param pType (NodeRef i (_,_)) input = connect input $ ParamRef i pType
+param _ _ _ = error "connectParam used with not actual node"
+
+setParam :: AudioIO m => ParamType -> Double -> AudioTime -> NodeRef -> SynthDef m NodeRef
+setParam pType v t (NodeRef i (iChnls,oChnls)) = addChange (SetValue (ParamRef i pType) v t) >> return (NodeRef i (iChnls,oChnls))
+setParam _ _ _ _ = error "setParam used with not actual node"
+
+linearRampOnParam :: AudioIO m => ParamType -> Double -> AudioTime -> NodeRef -> SynthDef m NodeRef
+linearRampOnParam pType v t (NodeRef i (iChnls,oChnls)) = addChange (LinearRampToValue (ParamRef i pType) v t) >> return (NodeRef i (iChnls,oChnls))
+linearRampOnParam _ _ _ _ = error "linearRampOnParam used with not actual node"
+
+exponentialRampOnParam :: AudioIO m => ParamType -> Double -> AudioTime -> NodeRef -> SynthDef m NodeRef
+exponentialRampOnParam pType v t (NodeRef i (iChnls,oChnls)) = addChange (ExponentialRampToValue (ParamRef i pType) v t) >> return (NodeRef i (iChnls,oChnls))
+exponentialRampOnParam _ _ _ _ = error "exponentialRampOnParam used with not actual node"
+
+curveOnParam :: AudioIO m => ParamType -> [Double] -> AudioTime -> AudioTime -> NodeRef -> SynthDef m NodeRef
+curveOnParam pType vs t dur (NodeRef i (iChnls,oChnls)) = addChange (CurveToValue (ParamRef i pType) vs t dur) >> return (NodeRef i (iChnls,oChnls))
+curveOnParam _ _ _ _ _ = error "curveOnParam used with not actual node"
diff --git a/src/Sound/MusicW/Transformations.hs b/src/Sound/MusicW/Transformations.hs
new file mode 100644
--- /dev/null
+++ b/src/Sound/MusicW/Transformations.hs
@@ -0,0 +1,71 @@
+module Sound.MusicW.Transformations where
+
+import Control.Monad
+
+import Sound.MusicW.AudioContext
+import Sound.MusicW.Node
+import Sound.MusicW.SynthDef
+import Sound.MusicW.FloatArraySpec
+
+clipAt :: AudioIO m => Double -> NodeRef -> SynthDef m NodeRef
+clipAt x input = do
+ let nSamples = 65536 :: Int
+ let portion = (1.0 - x) / 2.0
+ let nConstSamples = floor $ portion * fromIntegral nSamples
+ let left = Const (nConstSamples-1) (-x) EmptyArray
+ let mid = listToArraySpec [((2.0 * fromIntegral i) / (fromIntegral nSamples)) - 1 | i <- [nConstSamples..(nSamples-nConstSamples)-1]]
+ let right = Const (nConstSamples-1) x EmptyArray
+ waveShaper (Right $ mconcat [left, mid, right]) NoOversampling input
+
+-- | A panner not based on the WebAudio API panner node but rather on
+-- straightforward equal power paining using two gain nodes.
+
+equalPowerPan :: AudioIO m => Double -> NodeRef -> SynthDef m NodeRef
+equalPowerPan x input = do
+ left <- gain (gainFromDistance x) input
+ right <- gain (gainFromDistance (1-x)) input
+ channelMerger [left,right]
+
+gainFromDistance :: Double -> Double
+gainFromDistance x | abs x > 1 = 0
+gainFromDistance x | otherwise = cos $ abs x * pi / 2
+
+-- | circlePan pans a given single-channel signal around a circle of outputs
+-- positions of 0 or 1 pan directly to the first output channel
+-- positions between 0 and 1 move through the other outputs
+
+circlePan :: AudioIO m => Int -> Double -> NodeRef -> SynthDef m NodeRef
+circlePan 0 _ _ = constantSource 0
+circlePan 1 _ input = return input
+circlePan n pos input = do
+ let pos' = pos - (fromIntegral $ floor pos)
+ let pos'' = (fromIntegral n) * pos'
+ let gs = fmap (gainFromDistance . ((-) pos'')) $ take n [0..]
+ let g0 = gainFromDistance $ pos'' - (fromIntegral n)
+ let gs' = (head gs + g0):tail gs -- taking account of "wrap-around"
+ xs <- mapM (\x -> gain x input) gs'
+ channelMerger xs
+
+-- | splay pans a list of signals by distributing them equally over an array
+-- of speakers/outputs. When there are more than 2 outputs (as indicated by first
+-- argument) the signals are equidistantly distributed around a "circle" (using
+-- circlePan, above) with the first signal in the list at position 0. When there
+-- are only 2 outputs, equalPowerPan (above) is used instead, and the signals are
+-- panned such that a single signal will be centre panned, two signals will be
+-- panned hard left and right, and two or more signals will be distributed so that
+-- the first signal is guaranteed to be hard left and the last signal is hard right.
+
+splay :: AudioIO m => Int -> [NodeRef] -> SynthDef m NodeRef
+splay n [] = constantSource 0 >>= circlePan n 0
+splay 2 (i:[]) = equalPowerPan 0.5 i
+splay n (i:[]) = circlePan n 0.5 i
+splay 2 inputs = do
+ let i = 1/(fromIntegral $ length inputs - 1)
+ let positions = fmap ((*) i) $ take (length inputs) [0..]
+ xs <- zipWithM equalPowerPan positions inputs
+ mix xs
+splay n inputs = do
+ let i = 1/(fromIntegral $ length inputs)
+ let positions = fmap ((*) i) $ take (length inputs) [0..]
+ xs <- zipWithM (circlePan n) positions inputs
+ mix xs
diff --git a/src/Sound/MusicW/Worklets.hs b/src/Sound/MusicW/Worklets.hs
new file mode 100644
--- /dev/null
+++ b/src/Sound/MusicW/Worklets.hs
@@ -0,0 +1,309 @@
+{-# LANGUAGE JavaScriptFFI #-}
+
+module Sound.MusicW.Worklets where
+
+import GHCJS.Types
+import GHCJS.Prim (toJSString)
+import Control.Monad
+import Control.Monad.IO.Class
+
+import Sound.MusicW.AudioContext
+import Sound.MusicW.Node
+import Sound.MusicW.SynthDef
+
+-- note: for any of these functions to work one must have a secure browser context
+-- AND one must have called (successfully) addWorklets :: AudioContext -> IO ()
+
+equalWorklet :: AudioIO m => NodeRef -> NodeRef -> SynthDef m NodeRef
+equalWorklet in1 in2 = audioWorklet "equal-processor" [in1,in2]
+
+notEqualWorklet :: AudioIO m => NodeRef -> NodeRef -> SynthDef m NodeRef
+notEqualWorklet in1 in2 = audioWorklet "notEqual-processor" [in1,in2]
+
+greaterThanWorklet :: AudioIO m => NodeRef -> NodeRef -> SynthDef m NodeRef
+greaterThanWorklet in1 in2 = audioWorklet "greaterThan-processor" [in1,in2]
+
+greaterThanOrEqualWorklet :: AudioIO m => NodeRef -> NodeRef -> SynthDef m NodeRef
+greaterThanOrEqualWorklet in1 in2 = audioWorklet "greaterThanOrEqual-processor" [in1,in2]
+
+lessThanWorklet :: AudioIO m => NodeRef -> NodeRef -> SynthDef m NodeRef
+lessThanWorklet in1 in2 = audioWorklet "lessThan-processor" [in1,in2]
+
+lessThanOrEqualWorklet :: AudioIO m => NodeRef -> NodeRef -> SynthDef m NodeRef
+lessThanOrEqualWorklet in1 in2 = audioWorklet "lessThanOrEqual-processor" [in1,in2]
+
+midiCpsWorklet :: AudioIO m => NodeRef -> SynthDef m NodeRef
+midiCpsWorklet x = audioWorklet "midiCps-processor" [x]
+
+cpsMidiWorklet :: AudioIO m => NodeRef -> SynthDef m NodeRef
+cpsMidiWorklet x = audioWorklet "cpsMidi-processor" [x]
+
+ampDbWorklet :: AudioIO m => NodeRef -> SynthDef m NodeRef
+ampDbWorklet x = audioWorklet "ampDb-processor" [x]
+
+dbAmpWorklet :: AudioIO m => NodeRef -> SynthDef m NodeRef
+dbAmpWorklet x = audioWorklet "dbAmp-processor" [x]
+
+absWorklet :: AudioIO m => NodeRef -> SynthDef m NodeRef
+absWorklet x = audioWorklet "abs-processor" [x]
+
+sqrtWorklet :: AudioIO m => NodeRef -> SynthDef m NodeRef
+sqrtWorklet x = audioWorklet "sqrt-processor" [x]
+
+safeDivideWorklet :: AudioIO m => NodeRef -> NodeRef -> SynthDef m NodeRef
+safeDivideWorklet in1 in2 = audioWorklet "safeDivide-processor" [in1,in2]
+
+
+audioWorklet :: AudioIO m => String -> [NodeRef] -> SynthDef m NodeRef
+audioWorklet workletName inputs = do
+ let iChnls = length inputs -- NOTE limiting assumption that each input NodeRef provides only one channel of input
+ let oChnls = 1 -- NOTE limiting assumption that each audio worklet provides only one channel of output
+ y <- addNodeBuilder (iChnls,oChnls) $ createAudioWorkletNode iChnls oChnls workletName
+ zipWithM (\x n -> connect' x 0 y n) inputs [0..]
+ return y
+
+createAudioWorkletNode :: AudioIO m => Int -> Int -> String -> m Node
+createAudioWorkletNode inChnls outChnls workletName = do
+ ctx <- audioContext
+ node <- liftIO $ js_createAudioWorkletNode ctx (toJSString workletName) inChnls outChnls
+ setNodeField node "isSource" (outChnls > 0)
+ setNodeField node "isSink" (inChnls > 0)
+ setNodeField node "startable" False
+
+foreign import javascript safe
+ "new AudioWorkletNode($1, $2, { numberOfInputs: $3, numberOfOutputs: $4 } )"
+ js_createAudioWorkletNode :: AudioContext -> JSVal -> Int -> Int -> IO Node
+
+addWorklets :: AudioContext -> IO ()
+addWorklets ac = do
+ blob <- js_workletsBlob (toJSString workletsJS)
+ url <- js_workletsURL blob
+ js_audioWorkletAddModule ac url
+
+foreign import javascript safe
+ "new Blob([$1], { type: 'application/javascript' })"
+ js_workletsBlob :: JSVal -> IO JSVal
+
+foreign import javascript safe
+ "URL.createObjectURL($1)"
+ js_workletsURL :: JSVal -> IO JSVal
+
+foreign import javascript safe
+ "$1.audioWorklet.addModule($2);"
+ js_audioWorkletAddModule :: AudioContext -> JSVal -> IO ()
+
+workletsJS :: String
+workletsJS = "\
+\ class EqualProcessor extends AudioWorkletProcessor {\
+\ static get parameterDescriptors() {\
+\ return [];\
+\ }\
+\ constructor() {\
+\ super();\
+\ }\
+\ process(inputs,outputs,parameters) {\
+\ const input1 = inputs[0];\
+\ const input2 = inputs[1];\
+\ const output = outputs[0];\
+\ for(let i = 0; i < input1[0].length; i++) {\
+\ if(input1[0][i] == input2[0][i]) output[0][i] = 1; else output[0][i] = 0;\
+\ }\
+\ return true;\
+\ }\
+\ }\
+\ registerProcessor('equal-processor',EqualProcessor);\
+\ \
+\ class NotEqualProcessor extends AudioWorkletProcessor {\
+\ static get parameterDescriptors() {\
+\ return [];\
+\ }\
+\ constructor() {\
+\ super();\
+\ }\
+\ process(inputs,outputs,parameters) {\
+\ const input1 = inputs[0];\
+\ const input2 = inputs[1];\
+\ const output = outputs[0];\
+\ for(let i = 0; i < input1[0].length; i++) {\
+\ if(input1[0][i] != input2[0][i]) output[0][i] = 1; else output[0][i] = 0;\
+\ }\
+\ return true;\
+\ }\
+\ }\
+\ registerProcessor('notEqual-processor',NotEqualProcessor);\
+\ \
+\ class GreaterThanProcessor extends AudioWorkletProcessor {\
+\ static get parameterDescriptors() {\
+\ return [];\
+\ }\
+\ constructor() {\
+\ super();\
+\ }\
+\ process(inputs,outputs,parameters) {\
+\ const input1 = inputs[0];\
+\ const input2 = inputs[1];\
+\ const output = outputs[0];\
+\ for(let i = 0; i < input1[0].length; i++) {\
+\ if(input1[0][i] > input2[0][i]) output[0][i] = 1; else output[0][i] = 0;\
+\ }\
+\ return true;\
+\ }\
+\ }\
+\ registerProcessor('greaterThan-processor',GreaterThanProcessor);\
+\ \
+\ class GreaterThanOrEqualProcessor extends AudioWorkletProcessor {\
+\ static get parameterDescriptors() {\
+\ return [];\
+\ }\
+\ constructor() {\
+\ super();\
+\ }\
+\ process(inputs,outputs,parameters) {\
+\ const input1 = inputs[0];\
+\ const input2 = inputs[1];\
+\ const output = outputs[0];\
+\ for(let i = 0; i < input1[0].length; i++) {\
+\ if(input1[0][i] >= input2[0][i]) output[0][i] = 1; else output[0][i] = 0;\
+\ }\
+\ return true;\
+\ }\
+\ }\
+\ registerProcessor('greaterThanOrEqual-processor',GreaterThanOrEqualProcessor);\
+\ \
+\ class LessThanProcessor extends AudioWorkletProcessor {\
+\ static get parameterDescriptors() {\
+\ return [];\
+\ }\
+\ constructor() {\
+\ super();\
+\ }\
+\ process(inputs,outputs,parameters) {\
+\ const input1 = inputs[0];\
+\ const input2 = inputs[1];\
+\ const output = outputs[0];\
+\ for(let i = 0; i < input1[0].length; i++) {\
+\ if(input1[0][i] < input2[0][i]) output[0][i] = 1; else output[0][i] = 0;\
+\ }\
+\ return true;\
+\ }\
+\ }\
+\ registerProcessor('lessThan-processor',LessThanProcessor);\
+\ \
+\ class LessThanOrEqualProcessor extends AudioWorkletProcessor {\
+\ static get parameterDescriptors() {\
+\ return [];\
+\ }\
+\ constructor() {\
+\ super();\
+\ }\
+\ process(inputs,outputs,parameters) {\
+\ const input1 = inputs[0];\
+\ const input2 = inputs[1];\
+\ const output = outputs[0];\
+\ for(let i = 0; i < input1[0].length; i++) {\
+\ if(input1[0][i] <= input2[0][i]) output[0][i] = 1; else output[0][i] = 0;\
+\ }\
+\ return true;\
+\ }\
+\ }\
+\ registerProcessor('lessThanOrEqual-processor',LessThanOrEqualProcessor);\
+\ \
+\ class MidiCpsProcessor extends AudioWorkletProcessor {\
+\ static get parameterDescriptors() { return []; }\
+\ constructor() { super(); }\
+\ process(inputs,outputs,parameters) {\
+\ const input = inputs[0];\
+\ const output = outputs[0];\
+\ for(let i = 0; i < input[0].length; i++) {\
+\ output[0][i] = 440 * (2 ** ((input[0][i]-69)/12));\
+\ }\
+\ return true;\
+\ }\
+\ }\
+\ registerProcessor('midiCps-processor',MidiCpsProcessor);\
+\ \
+\ class CpsMidiProcessor extends AudioWorkletProcessor {\
+\ static get parameterDescriptors() { return []; }\
+\ constructor() { super(); }\
+\ process(inputs,outputs,parameters) {\
+\ const input = inputs[0];\
+\ const output = outputs[0];\
+\ for(let i = 0; i < input[0].length; i++) {\
+\ output[0][i] = 69 + (12 * (Math.log2(input[0][i]/440)));\
+\ }\
+\ return true;\
+\ }\
+\ }\
+\ registerProcessor('cpsMidi-processor',CpsMidiProcessor);\
+\ \
+\ class DbAmpProcessor extends AudioWorkletProcessor {\
+\ static get parameterDescriptors() { return []; }\
+\ constructor() { super(); }\
+\ process(inputs,outputs,parameters) {\
+\ const input = inputs[0];\
+\ const output = outputs[0];\
+\ for(let i = 0; i < input[0].length; i++) {\
+\ output[0][i] = 10 ** (input[0][i]/20);\
+\ }\
+\ return true;\
+\ }\
+\ }\
+\ registerProcessor('dbAmp-processor',DbAmpProcessor);\
+\ \
+\ class AmpDbProcessor extends AudioWorkletProcessor {\
+\ static get parameterDescriptors() { return []; }\
+\ constructor() { super(); }\
+\ process(inputs,outputs,parameters) {\
+\ const input = inputs[0];\
+\ const output = outputs[0];\
+\ for(let i = 0; i < input[0].length; i++) {\
+\ output[0][i] = 20 * Math.log10(input[0][i]);\
+\ }\
+\ return true;\
+\ }\
+\ }\
+\ registerProcessor('ampDb-processor',AmpDbProcessor);\
+\ \
+\ class AbsProcessor extends AudioWorkletProcessor {\
+\ static get parameterDescriptors() { return []; }\
+\ constructor() { super(); }\
+\ process(inputs,outputs,parameters) {\
+\ const input = inputs[0];\
+\ const output = outputs[0];\
+\ for(let i = 0; i < input[0].length; i++) {\
+\ output[0][i] = Math.abs(input[0][i]);\
+\ }\
+\ return true;\
+\ }\
+\ }\
+\ registerProcessor('abs-processor',AbsProcessor);\
+\ \
+\ class SqrtProcessor extends AudioWorkletProcessor {\
+\ static get parameterDescriptors() { return []; }\
+\ constructor() { super(); }\
+\ process(inputs,outputs,parameters) {\
+\ const input = inputs[0];\
+\ const output = outputs[0];\
+\ for(let i = 0; i < input[0].length; i++) {\
+\ output[0][i] = Math.sqrt(input[0][i]);\
+\ }\
+\ return true;\
+\ }\
+\ }\
+\ registerProcessor('sqrt-processor',SqrtProcessor);\
+\ \
+\ class SafeDivideProcessor extends AudioWorkletProcessor {\
+\ static get parameterDescriptors() { return []; }\
+\ constructor() { super(); }\
+\ process(inputs,outputs,parameters) {\
+\ const input1 = inputs[0];\
+\ const input2 = inputs[1];\
+\ const output = outputs[0];\
+\ for(let i = 0; i < input1[0].length; i++) {\
+\ if(input2[0][i] == 0) output[0][i] = 0;\
+\ else output[0][i] = input1[0][i] / input2[0][i];\
+\ }\
+\ return true;\
+\ }\
+\ }\
+\ registerProcessor('safeDivide-processor',SafeDivideProcessor);"