pipes-pulse-simple (empty) → 0.1.0.0
raw patch · 5 files changed
+372/−0 lines, 5 filesdep +basedep +bytestringdep +pipes
Dependencies added: base, bytestring, pipes, pipes-safe, pulse-simple
Files
- CHANGELOG.md +9/−0
- LICENSE +201/−0
- README.md +7/−0
- pipes-pulse-simple.cabal +50/−0
- src/Pipes/PulseSimple.hs +105/−0
+ CHANGELOG.md view
@@ -0,0 +1,9 @@+# Changelog++`pipes-pulse-simple` uses [PVP Versioning][1].++## 0.0.0.0++* Initially created.++[1]: https://pvp.haskell.org
+ LICENSE view
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+ README.md view
@@ -0,0 +1,7 @@+# pipes-pulse-simple++[](https://hackage.haskell.org/package/pipes-pulse-simple)+[](LICENSE)++Simple pipes for simple pulse audio.+Checkout the [example](https://github.com/TristanCacqueray/pipes-pulse-simple/blob/master/example/Main.hs) for usage.
+ pipes-pulse-simple.cabal view
@@ -0,0 +1,50 @@+cabal-version: 2.4+name: pipes-pulse-simple+version: 0.1.0.0+synopsis: Pipes for pulse-simple audio+description:+ Pipes for pulse-simple audio.+ .+ Use this library to produce or consume audio buffer.+ .+homepage: https://github.com/TristanCacqueray/pipes-pulse-simple#readme+bug-reports: https://github.com/TristanCacqueray/pipes-pulse-simple/issues+license: Apache-2.0+license-file: LICENSE+author: Tristan de Cacqueray+maintainer: Tristan de Cacqueray <tdecacqu@redhat.com>+copyright: 2021 Tristan de Cacqueray+category: Sound+build-type: Simple+extra-doc-files: README.md+ CHANGELOG.md++source-repository head+ type: git+ location: https://github.com/TristanCacqueray/pipes-pulse-simple.git++library+ build-depends: base < 5+ , bytestring < 0.12.0.0+ , pipes < 4.4.0.0+ , pipes-safe < 3.0.0+ , pulse-simple < 0.2.0.0+ ghc-options: -Wall+ -Wcompat+ -Widentities+ -Wincomplete-uni-patterns+ -Wincomplete-record-updates+ if impl(ghc >= 8.0)+ ghc-options: -Wredundant-constraints+ if impl(ghc >= 8.2)+ ghc-options: -fhide-source-paths+ if impl(ghc >= 8.4)+ ghc-options: -Wmissing-export-lists+ -Wpartial-fields+ if impl(ghc >= 8.8)+ ghc-options: -Wmissing-deriving-strategies+ if impl(ghc >= 8.10)+ ghc-options: -Wunused-packages+ default-language: Haskell2010+ hs-source-dirs: src+ exposed-modules: Pipes.PulseSimple
+ src/Pipes/PulseSimple.hs view
@@ -0,0 +1,105 @@+{-# LANGUAGE LambdaCase #-}+{-# LANGUAGE RankNTypes #-}++-- |+-- Copyright: (c) 2021 Tristan de Cacqueray+-- SPDX-License-Identifier: Apache-2.0+-- Maintainer: Tristan de Cacqueray <tdecacqu@redhat.com>+--+-- Pipes for simple-pulse audio+module Pipes.PulseSimple+ ( readPulse,+ writePulse,+ )+where++import Control.Monad.IO.Class (MonadIO, liftIO)+import Data.ByteString (ByteString)+import Data.Maybe (fromMaybe)+import Pipes (Consumer', Producer', await, yield)+import Pipes.Safe (MonadSafe, bracket)+import Sound.Pulse.Simple+ ( BufferAttr (..),+ Direction (..),+ Endian (..),+ SampleFormat (..),+ SampleSpec (..),+ Simple,+ simpleFree,+ simpleNew,+ simpleReadRaw,+ simpleWriteRaw,+ )++defaultSampleSpec :: SampleSpec+defaultSampleSpec = SampleSpec (S16 LittleEndian) 44100 1++-- | Return the bits count of a single sample+sampleSize :: SampleFormat -> Int+sampleSize = \case+ U8 _ -> 1+ S16 _ -> 2+ S24 _ -> 3+ S2432 _ -> 4+ S32 _ -> 4+ F32 _ -> 4++-- | Return the bits count of an one second buffer+bufferSize :: SampleSpec -> Int+bufferSize (SampleSpec fmt sampling chan) = sampleSize fmt * sampling * chan++-- | Compute the sample spec and buffer size for a given fps+specSize :: Maybe SampleSpec -> Int -> (SampleSpec, Int)+specSize specm fps = (spec, size)+ where+ spec = fromMaybe defaultSampleSpec specm+ size = bufferSize spec `div` fps++newClient :: MonadIO m => String -> Direction -> SampleSpec -> Int -> m Simple+newClient name dir spec size = liftIO create+ where+ create = simpleNew Nothing name dir Nothing "pulse-pipe" spec Nothing bufAttr+ bufAttr = Just (BufferAttr (Just size) (Just size) (Just size) (Just size) (Just size))++freeClient :: MonadIO m => Simple -> m ()+freeClient = liftIO . simpleFree++-- | Create an audio pipe producer that yields `fps` bytestring buffer per second+readPulse ::+ MonadSafe m =>+ -- | The client name+ String ->+ -- | The sample spec, default to mono 44100 Hz 16 bit signed integer+ Maybe SampleSpec ->+ -- | Frames per second+ Int ->+ -- | The pipe producing bytestring+ Producer' ByteString m ()+readPulse name specm fps = bracket (newClient name Record spec size) freeClient producePulse+ where+ (spec, size) = specSize specm fps+ producePulse s = do+ buf <- liftIO (simpleReadRaw s size)+ yield buf+ producePulse s+{-# INLINEABLE readPulse #-}++-- | Create an audio pipe consumer that awaits `fps` bytestring buffer per second+writePulse ::+ MonadSafe m =>+ -- | The client name+ String ->+ -- | The sample spec, default to mono 44100 Hz 16 bit signed integer+ Maybe SampleSpec ->+ -- | Frames per second+ Int ->+ -- | The pipe consuming bytestring+ Consumer' ByteString m ()+writePulse name specm fps = bracket (newClient name Play spec size) freeClient consumePulse+ where+ (spec, size) = specSize specm fps+ consumePulse s = do+ buf <- await+ liftIO (simpleWriteRaw s buf)+ consumePulse s+{-# INLINEABLE writePulse #-}