Data.ByteString.Mp4.AudioStreaming

A single-track AAC audio streaming utility wrapping AudioFile for streaming via e.g. DASH.

Documentation

data Segment

Constructors

Segment !Word32 !Word64 !ByteString

Instances

Show Segment

Methods

showsPrec :: Int -> Segment -> ShowS

show :: Segment -> String

showList :: [Segment] -> ShowS

newtype InitSegment

Constructors

InitSegment ByteString

Instances

Show InitSegment

Methods

showsPrec :: Int -> InitSegment -> ShowS

show :: InitSegment -> String

showList :: [InitSegment] -> ShowS

data StreamingContext

Contains a sample in the ISO14496 style interpretation, i.e. a smallish buffer of e.g. 20ms audio data or a single video frame. A sample has some kind of time or at least order associated to it. TODO not right now, add it

Also a sample has a duration measured as the sampleCount. TODO make this a real data type, and possible refactor this to be a seperate issue from filling stream gaps and determining the offsets and the decoding time stamp.

Contains the configuration and state for the creation of a DASH audio stream.

data AacMp4StreamConfig

Initialisation segment parameters of an aac audio stream mp4 file.

Constructors

AacMp4StreamConfig !(TS32 "creation_time") !String !Bool !SamplingFreqTable !ChannelConfigTable

data AacMp4TrackFragment

Media fragment segment parameters of an aac audio stream mp4 file.

Constructors

AacMp4TrackFragment !Word32 !Word64 ![(Word32, ByteString)]

numberOfChannels :: Num a => StreamingContext -> a

buildAacMp4TrackFragment :: AacMp4TrackFragment -> Builder

Convert a 'AacMp4TrackFragment record to a generic Boxes collection.

buildAacMp4StreamInit :: AacMp4StreamConfig -> Builder

Convert a AacMp4StreamConfig record to a generic Boxes collection.

getStreamConfig :: StreamingContext -> AacMp4StreamConfig

Return the AacMp4StreamConfig from an StreamingContext

getStreamBaseTime :: StreamingContext -> Word64

Return the current base decoding time

getStreamSequence :: StreamingContext -> Word32

Return the current sequence number

addToBaseTime :: StreamingContext -> NominalDiffTime -> StreamingContext

getSegmentDuration :: StreamingContext -> NominalDiffTime

streamInitINTERNAL_TESTING :: String -> NominalDiffTime -> Bool -> SamplingFreqTable -> ChannelConfigTable -> IO (InitSegment, StreamingContext)

Initiate the StreamingContext and create the MP4 init segment. This lives in IO because it read the current time from the real world.

streamInitUtc :: String -> UTCTime -> UTCTime -> NominalDiffTime -> Bool -> SamplingFreqTable -> ChannelConfigTable -> (InitSegment, StreamingContext)

Initiate the StreamingContext and create the MP4 init segment. This lives in IO because it read the current time from the real world.

streamNextSample :: Word32 -> ByteString -> StreamingContext -> (Maybe Segment, StreamingContext)

Enqueue a sample, if enough samples are accumulated, generate the next segment

streamFlush :: StreamingContext -> (Maybe Segment, StreamingContext)

Enqueue a sample, if enough samples are accumulated, generate the next segment