Safe Haskell	None
Language	Haskell2010

Data.MediaBus.Media.Audio.Raw.Alaw

Description

This module defines the **Alaw** audio sample type, as well as compading conversion functions from/to S16 values.

Synopsis

Documentation

data ALaw Source #

A PCM audio sample represented by a single byte, that can be converted to a signed 13bit audio sample.

Instances

Eq ALaw Source #
Methods (==) :: ALaw -> ALaw -> Bool # (/=) :: ALaw -> ALaw -> Bool #
Num ALaw Source #
Methods (+) :: ALaw -> ALaw -> ALaw # (-) :: ALaw -> ALaw -> ALaw # (*) :: ALaw -> ALaw -> ALaw # negate :: ALaw -> ALaw # abs :: ALaw -> ALaw # signum :: ALaw -> ALaw # fromInteger :: Integer -> ALaw #
Show ALaw Source #
Methods showsPrec :: Int -> ALaw -> ShowS # show :: ALaw -> String # showList :: [ALaw] -> ShowS #
Generic ALaw Source #
Associated Types type Rep ALaw :: * -> * # Methods from :: ALaw -> Rep ALaw x # to :: Rep ALaw x -> ALaw #
Arbitrary ALaw Source #
Methods arbitrary :: Gen ALaw # shrink :: ALaw -> [ALaw] #
Storable ALaw Source #
Methods sizeOf :: ALaw -> Int # alignment :: ALaw -> Int # peekElemOff :: Ptr ALaw -> Int -> IO ALaw # pokeElemOff :: Ptr ALaw -> Int -> ALaw -> IO () # peekByteOff :: Ptr b -> Int -> IO ALaw # pokeByteOff :: Ptr b -> Int -> ALaw -> IO () # peek :: Ptr ALaw -> IO ALaw # poke :: Ptr ALaw -> ALaw -> IO () #
Bits ALaw Source #
Methods (.&.) :: ALaw -> ALaw -> ALaw # (.\|.) :: ALaw -> ALaw -> ALaw # xor :: ALaw -> ALaw -> ALaw # complement :: ALaw -> ALaw # shift :: ALaw -> Int -> ALaw # rotate :: ALaw -> Int -> ALaw # zeroBits :: ALaw # bit :: Int -> ALaw # setBit :: ALaw -> Int -> ALaw # clearBit :: ALaw -> Int -> ALaw # complementBit :: ALaw -> Int -> ALaw # testBit :: ALaw -> Int -> Bool # bitSizeMaybe :: ALaw -> Maybe Int # bitSize :: ALaw -> Int # isSigned :: ALaw -> Bool # shiftL :: ALaw -> Int -> ALaw # unsafeShiftL :: ALaw -> Int -> ALaw # shiftR :: ALaw -> Int -> ALaw # unsafeShiftR :: ALaw -> Int -> ALaw # rotateL :: ALaw -> Int -> ALaw # rotateR :: ALaw -> Int -> ALaw # popCount :: ALaw -> Int #
Default ALaw Source #
Methods def :: ALaw #
NFData ALaw Source #
Methods rnf :: ALaw -> () #
CanBeBlank ALaw Source #
Methods blank :: ALaw Source #
IsPcmValue ALaw Source #
Methods pcmAverage :: ALaw -> ALaw -> ALaw Source #
type Rep ALaw Source #
type Rep ALaw = D1 (MetaData "ALaw" "Data.MediaBus.Media.Audio.Raw.Alaw" "mediabus-0.4.0.1-KxOztWIrQ7SL9k5ZMcQI4H" True) (C1 (MetaCons "MkALaw" PrefixI True) (S1 (MetaSel (Just Symbol "_alawValue") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 Word8)))

encodeALawSample :: S16 -> ALaw Source #

See http://opensource.apple.com//source/tcl/tcl-20/tcl_ext/snack/snack/generic/g711.c

	Linear Input Code	 Compressed Code
	-----------------  ---------------
	  0000000wxyza         000wxyz
	  0000001wxyza         001wxyz
	  000001wxyzab         010wxyz
	  00001wxyzabc         011wxyz
	  0001wxyzabcd         100wxyz
	  001wxyzabcde         101wxyz
	  01wxyzabcdef         110wxyz
	  1wxyzabcdefg         111wxyz

For further information see John C. Bellamy's Digital Telephony, 1982, John Wiley & Sons, pps 98-111 and 472-476.

decodeALawSample :: ALaw -> S16 Source #

Uncompress an alaw sample into a linear 16 signed value, see encodeALawSample for more information.

alawSample :: Iso' ALaw S16 Source #

An Iso between ALaw and S16 using encodeALawSample and decodeALawSample.

alawValue :: Iso' ALaw Word8 Source #

An Iso for ALaw sample values.