Module Faad.Mp4

module Mp4: sig .. end

type decoder = Faad.t

type t

An MP4 reader.

type track = int

A track number.

type sample = int

A sample number.

val is_mp4 : string -> bool

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

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