Sound.ALSA.PCM.Node.ALSA

Types

data Handle i y

Instances

Storable (Handle i y)

Methods

sizeOf :: Handle i y -> Int

alignment :: Handle i y -> Int

peekElemOff :: Ptr (Handle i y) -> Int -> IO (Handle i y)

pokeElemOff :: Ptr (Handle i y) -> Int -> Handle i y -> IO ()

peekByteOff :: Ptr b -> Int -> IO (Handle i y)

pokeByteOff :: Ptr b -> Int -> Handle i y -> IO ()

peek :: Ptr (Handle i y) -> IO (Handle i y)

poke :: Ptr (Handle i y) -> Handle i y -> IO ()

data Stream

Constructors

StreamPlayback

StreamCapture

Instances

Bounded Stream

Methods

minBound :: Stream

maxBound :: Stream

Enum Stream

Methods

succ :: Stream -> Stream

pred :: Stream -> Stream

toEnum :: Int -> Stream

fromEnum :: Stream -> Int

enumFrom :: Stream -> [Stream]

enumFromThen :: Stream -> Stream -> [Stream]

enumFromTo :: Stream -> Stream -> [Stream]

enumFromThenTo :: Stream -> Stream -> Stream -> [Stream]

Eq Stream

Methods

(==) :: Stream -> Stream -> Bool

(/=) :: Stream -> Stream -> Bool

Show Stream

Methods

showsPrec :: Int -> Stream -> ShowS

show :: Stream -> String

showList :: [Stream] -> ShowS

data Mode

Instances

Semigroup Mode

Methods

(<>) :: Mode -> Mode -> Mode

sconcat :: NonEmpty Mode -> Mode

stimes :: Integral b => b -> Mode -> Mode

Monoid Mode

Methods

mempty :: Mode

mappend :: Mode -> Mode -> Mode

mconcat :: [Mode] -> Mode

modes :: [Mode] -> Mode

nonBlock :: Mode

async :: Mode

data Interleaved

Instances

Access Interleaved

Methods

access :: T Interleaved y Access

setChannels :: C y => T Interleaved y ()

data Noninterleaved

Instances

Access Noninterleaved

Methods

access :: T Noninterleaved y Access

setChannels :: C y => T Noninterleaved y ()

type Time = Int

type SampleFreq = Int

type Size = Int

Classes

class Access i

Minimal complete definition

access, setChannels

Instances

Access Noninterleaved

Methods

access :: T Noninterleaved y Access

setChannels :: C y => T Noninterleaved y ()

Access Interleaved

Methods

access :: T Interleaved y Access

setChannels :: C y => T Interleaved y ()

class (Storable y, C y) => SampleFmt y

Minimal complete definition

sampleFmtToPcmFormat

Instances

SampleFmt Double

Methods

sampleFmtToPcmFormat :: Double -> Format

SampleFmt Float

Methods

sampleFmtToPcmFormat :: Float -> Format

SampleFmt Int8

Methods

sampleFmtToPcmFormat :: Int8 -> Format

SampleFmt Int16

Methods

sampleFmtToPcmFormat :: Int16 -> Format

SampleFmt Int32

Methods

sampleFmtToPcmFormat :: Int32 -> Format

SampleFmt Word8

Methods

sampleFmtToPcmFormat :: Word8 -> Format

SampleFmt Word16

Methods

sampleFmtToPcmFormat :: Word16 -> Format

SampleFmt Word32

Methods

sampleFmtToPcmFormat :: Word32 -> Format

SampleFmt T

Methods

sampleFmtToPcmFormat :: T -> Format

SampleFmt a => SampleFmt (T a)

Methods

sampleFmtToPcmFormat :: T a -> Format

class SampleFmt y => MonoSampleFmt y

Sample types of this class must have exactly one channel, i.e. Frame.numberOfChannels == 1.

Instances

MonoSampleFmt Double

MonoSampleFmt Float

MonoSampleFmt Int8

MonoSampleFmt Int16

MonoSampleFmt Int32

MonoSampleFmt Word8

MonoSampleFmt Word16

MonoSampleFmt Word32

MonoSampleFmt T

Management of streams

open

Arguments

:: (Access i, SampleFmt y)

=> Mode

-> Stream

-> T i y a

-> (a -> T i y b)

-> String

device, e.g "default"

-> IO (b, Handle i y)

close :: Handle i y -> IO ()

prepare :: Handle i y -> IO ()

start :: Handle i y -> IO ()

drop :: Handle i y -> IO ()

drain :: Handle i y -> IO ()

Data transfer

readi :: SampleFmt y => Handle Interleaved y -> Ptr y -> Size -> IO Size

writei :: SampleFmt y => Handle Interleaved y -> Ptr y -> Size -> IO Size

readiRetry :: SampleFmt y => Handle Interleaved y -> Ptr y -> Size -> IO Size

retry on buffer over-run

writeiRetry :: SampleFmt y => Handle Interleaved y -> Ptr y -> Size -> IO Size

retry on buffer under-run

readn :: MonoSampleFmt y => Handle Noninterleaved y -> Ptr (Ptr y) -> Size -> IO Size

The Ptr (Ptr y) argument is actually a pointer to an array of pointers. The array must have the size of number of channels. In Noninterleaved mode you must set the number of channels manually using setChannels or its friends. It is an unchecked error if the number of channels set with setChannels does not match the array size in the readn call.

writen :: MonoSampleFmt y => Handle Noninterleaved y -> Ptr (Ptr y) -> Size -> IO Size

Cf. readn.