package faad

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package faad

faad
- Faad
  - Mp4

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type decoder = t

type t

An MP4 reader.

type track = int

A track number.

type sample = int

A sample number.

type read = bytes -> int -> int -> int

Data read. Same signature as Unix.read.

val is_mp4 : string -> bool

Detect whether the file is an MP4 given at least 8 bytes of its header.

val openfile : 
  ?write:(Bytes.t -> int) ->
  ?seek:(int -> int) ->
  ?trunc:(unit -> int) ->
  read ->
  t

Open an MP4 file.

val openfile_fd : Unix.file_descr -> t

val tracks : t -> int

Total number of tracks.

val find_aac_track : t -> track

Find the first AAC track.

val init : t -> decoder -> track -> int * int

Initialize a decoder.

val seek : t -> track -> int -> int * int

Seek to the given offset, in audio samples. * returns a pair sample,toskip where * sample is the new current (mp4) sample * and toskip is an amount of audio sample * that should be skipped.

val samples : t -> track -> int

val read_sample : t -> track -> sample -> string

val decode : t -> track -> sample -> decoder -> float array array

val metadata : t -> (string * string) array