Module Switch

module Switch: sig .. end

Abstract operator which selects one of its children sources either at the beginning of a track or at every frame, depending on a parametrizable predicate. A few specializations of it are defined below.

type transition = Lang.value

type child = {

	`source : Source.source;`
	`transition : transition;`
	`mutable cur_meta : Request.metadata option;`

}
type track_mode =

`\|`	`Sensitive`
`\|`	`Insensitive`

The switch can either happen at any time in the stream (insensitive) or only at track limits (sensitive).

class virtual switch : kind:Frame.content_kind -> name:string -> ?mode:track_mode -> ?replay_meta:bool -> child list -> object .. end

Common tools for Lang bindings of switch operators

val common : Lang.t -> (string * Lang.t * Lang.value option * string option) list

val default_transition : Frame.content_kind -> Lang.value

val extract_common : kind:Frame.content_kind ->
       (string * Lang.value) list ->
       int -> bool * track_mode * Lang.value list

Switch: switch according to user-defined predicates.

val satisfied : Lang.value -> bool

val trivially_true : Lang.value -> bool

val third : 'a * 'b * 'c -> 'c

class lang_switch : kind:Frame.content_kind -> track_mode -> ?replay_meta:bool -> (Lang.value * bool * child) list -> object .. end

class fallback : kind:Frame.content_kind -> ?replay_meta:bool -> track_mode -> child list -> object .. end

Fallback selector: switch to the first ready source.

exception Found of child

Random switch

class random : kind:Frame.content_kind -> ?replay_meta:bool -> bool -> track_mode -> (int * child) list -> object .. end