Liquidsoap scripting language reference

The Source / … categories contain all functions that return sources. The Input functions are those which build elementary sources (playing files, synthesizing sound, etc.). The Output functions are those which take a source and register it for being streamed to the outside (file, soundcard, audio server, etc.). The Visualization functions are experimental ones that let you visualize in real-time some aspects of the audio stream. The Sound Processing functions are those which basically work on the source as a continuous audio stream. They would typically be mixers of streams, audio effects or analysis. Finally, Track Processing functions are basically all others, often having a behaviour that depends on or affects the extra information that liquidsoap puts in streams: track limits and metadata.

• Liquidsoap
• Uncategorized

Liquidsoap

deprecated

Mark a function as deprecated.

Type:

('a, string) -> unit

Arguments:

• (unlabeled) (of type 'a): Old function name.
• (unlabeled) (of type string): New function name.

register_flow

Deprecated: flow is no longer maintained Register a radio on Liquidsoap Flows.

Type:

(?server : string, ?user : string, ?password : string, ?email : string,
 radio : string, website : string, description : string, genre : string,
 streams : [string * string], 'b
 .{on_metadata : ((([string * string]) -> unit)) -> 'a}) -> 'a

Arguments:

• server (of type string, which defaults to "")
• user (of type string, which defaults to "default")
• password (of type string, which defaults to "default")
• email (of type string, which defaults to "")
• radio (of type string): Name of the radio.
• website (of type string): URL of the website of the radio.
• description (of type string): Description of the radio.
• genre (of type string): Genre of the radio (rock or rap or etc.).
• streams (of type [string * string]): List of streams for the radio described by a pair of strings consisting of the format of the stream and the url of the stream. The format should be of the form “ogg/128k” consisting of the codec and the bitrate, separated by “/”.
• (unlabeled) (of type 'b.{on_metadata : ((([string * string]) -> unit)) -> 'a})

Uncategorized

add_decoder

Deprecated: use decoder.add.

Type:

(name : string, description : string, ?mimes : [string],
 ?file_extensions : [string], ?priority : int, test : ((string) -> int),
 string) -> unit

Arguments:

• name (of type string)
• description (of type string)
• mimes (of type [string], which defaults to [])
• file_extensions (of type [string], which defaults to [])
• priority (of type int, which defaults to 1)
• test (of type (string) -> int)
• (unlabeled) (of type string)

add_metadata_resolver

Deprecated: use decoder.metadata.add.

Type:

(string, ((metadata : [string * string], string) -> [string * string])) ->
unit

Arguments:

• (unlabeled) (of type string)
• (unlabeled) (of type (metadata : [string * string], string) -> [string * string])

add_oblivious_decoder

Deprecated: use decoder.oblivious.add.

Type:

(name : string, description : string, test : ((string) -> int),
 ?priority : int, ?mimes : [string], ?file_extensions : [string],
 ?buffer : float, ((string) -> string)) -> unit

Arguments:

• name (of type string)
• description (of type string)
• test (of type (string) -> int)
• priority (of type int, which defaults to 1)
• mimes (of type [string], which defaults to [])
• file_extensions (of type [string], which defaults to [])
• buffer (of type float, which defaults to 5.0)
• (unlabeled) (of type (string) -> string)

add_playlist_parser

Deprecated: use playlist.parse.register instead

Type:

(format : string, strict : bool,
 ((?pwd : string, string) -> [[string * string] * string])) -> unit

Arguments:

• format (of type string)
• strict (of type bool)
• (unlabeled) (of type (?pwd : string, string) -> [[string * string] * string])

add_protocol

Deprecated: use protocol.add.

Type:

(?temporary : bool, ?static : ((string) -> bool), ?syntax : string,
 ?doc : string, string,
 ((rlog : ((string) -> unit), maxtime : float, string) -> string?)) -> unit

Arguments:

• temporary (of type bool, which defaults to false)
• static (of type (string) -> bool, which defaults to fun (_) -> false)
• syntax (of type string, which defaults to "Undocumented")
• doc (of type string, which defaults to "Undocumented")
• (unlabeled) (of type string)
• (unlabeled) (of type (rlog : ((string) -> unit), maxtime : float, string) -> string?)

add_timeout

Deprecated: this function has been replaced by thread.run.recurrent.

Type:

(?fast : bool, float, (() -> float)) -> unit

Arguments:

• fast (of type bool, which defaults to true)
• (unlabeled) (of type float)
• (unlabeled) (of type () -> float)

at

Deprecated: use at instead.

Type:

({bool}, source('a)) -> source('a)

Arguments:

• (unlabeled) (of type {bool})
• (unlabeled) (of type source('a))

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

audio_to_stereo

Deprecated: use source.stereo

Type:

(?id : string?, source(audio=pcm('a), 'b)) -> source(audio=pcm(stereo), 'b)
where 'b is a set of tracks to be muxed into a source

Arguments:

• id (of type string?, which defaults to null)
• (unlabeled) (of type source(audio=pcm('a), 'b) where 'b is a set of tracks to be muxed into a source)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

base64.decode

Deprecated: this function has been replaced by string.base64.decode.

Type:

(string) -> string

Arguments:

• (unlabeled) (of type string)

base64.encode

Deprecated: this function has been replaced by string.base64.encode.

Type:

(string) -> string

Arguments:

• (unlabeled) (of type string)

compress.old

Deprecated: use compress

Type:

(?id : string?, source(audio=pcm('a), 'b)) -> source(audio=pcm('a)
.{gain? : never, rms? : never}, 'b)
where 'b is a set of tracks to be muxed into a source

Arguments:

• id (of type string?, which defaults to null)
• (unlabeled) (of type source(audio=pcm('a), 'b) where 'b is a set of tracks to be muxed into a source)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• gain (of type () -> float):
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• rms (of type () -> float):
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

cue_cut

Deprecated: integrated into requests resolution.

Type:

(?id : string?, ?cue_in_metadata : string, ?cue_out_metadata : string,
 ?on_cue_in : (() -> unit), ?on_cue_out : (() -> unit), 'a) -> 'a

Arguments:

• id (of type string?, which defaults to "")
• cue_in_metadata (of type string, which defaults to "")
• cue_out_metadata (of type string, which defaults to "")
• on_cue_in (of type () -> unit, which defaults to {()})
• on_cue_out (of type () -> unit, which defaults to {()})
• (unlabeled) (of type 'a)

drop_audio

Deprecated: use source.drop.audio

Type:

(?id : string?, source(audio='a, 'b)) -> source(audio='a, 'b)
where 'b is a set of tracks to be muxed into a source

Arguments:

• id (of type string?, which defaults to null)
• (unlabeled) (of type source(audio='a, 'b) where 'b is a set of tracks to be muxed into a source)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

drop_metadata

Deprecated: use source.drop.metadata

Type:

(?id : string?, source('a)) -> source('a)
where 'a is a set of tracks to be muxed into a source

Arguments:

• id (of type string?, which defaults to null)
• (unlabeled) (of type source('a) where 'a is a set of tracks to be muxed into a source)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

drop_midi

Deprecated: use source.drop.midi

Type:

(?id : string?, source(midi='a, 'b)) -> source(midi='a, 'b)
where 'b is a set of tracks to be muxed into a source

Arguments:

• id (of type string?, which defaults to null)
• (unlabeled) (of type source(midi='a, 'b) where 'b is a set of tracks to be muxed into a source)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

drop_video

Deprecated: use source.drop.video

Type:

(?id : string?, source(video='a, 'b)) -> source(video='a, 'b)
where 'b is a set of tracks to be muxed into a source

Arguments:

• id (of type string?, which defaults to null)
• (unlabeled) (of type source(video='a, 'b) where 'b is a set of tracks to be muxed into a source)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

eat_blank

Deprecated: use blank.eat instead

Type:

(?id : string?, ?at_beginning : bool, ?max_blank : {float},
 ?min_noise : {float}, ?start_blank : bool, ?threshold : {float},
 ?track_sensitive : {bool}, source(audio=pcm('a), 'b)) ->
source(audio=pcm('a), 'b)

Arguments:

• id (of type string?, which defaults to null)
• at_beginning (of type bool, which defaults to false)
• max_blank (of type {float}, which defaults to 20.0)
• min_noise (of type {float}, which defaults to 0.0)
• start_blank (of type bool, which defaults to false)
• threshold (of type {float}, which defaults to -40.0)
• track_sensitive (of type {bool}, which defaults to true)
• (unlabeled) (of type source(audio=pcm('a), 'b))

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• dB_levels (of type () -> [float]?): Return the detected dB level for each channel.
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_blank (of type () -> bool): Indicate whether blank was detected.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

empty

Deprecated: this function has been replaced by source.fail.

Type:

(?id : string?) -> source('a)

Arguments:

• id (of type string?, which defaults to null)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

error.kind

Deprecated: use error method instead

Type:

('b.{kind : 'a}) -> 'a

Arguments:

• (unlabeled) (of type 'b.{kind : 'a})

error.message

Deprecated: use error method instead

Type:

('b.{message : 'a}) -> 'a

Arguments:

• (unlabeled) (of type 'b.{message : 'a})

exec_at

Deprecated: this function has been replaced by thread.when.

Type:

(?freq : float, pred : (() -> bool), (() -> 'a)) -> unit

Arguments:

• freq (of type float, which defaults to 1.0)
• pred (of type () -> bool)
• (unlabeled) (of type () -> 'a)

fade.final

Deprecated: was designed for transitions only and is not needed anymore. Use file.out instead.

Type:

(?id : string, ?duration : float, ?type : string, source(audio='a, 'b)) ->
source(audio='a, 'b)
where 'b is a set of tracks to be muxed into a source,
  'a is a track and a track of type: pcm, pcm_s16 or pcm_f32

Arguments:

• id (of type string, which defaults to "fade.final")
• duration (of type float, which defaults to 3.0)
• type (of type string, which defaults to "lin")
• (unlabeled) (of type source(audio='a, 'b) where 'b is a set of tracks to be muxed into a source, 'a is a track and a track of type: pcm, pcm_s16 or pcm_f32)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• selected (of type () -> source(audio='B, 'A)? where 'A is a set of tracks to be muxed into a source, 'B is a track and a track of type: pcm, pcm_s16 or pcm_f32): Currently selected source.
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

fade.initial

Deprecated: was designed for transitions only and is not needed anymore. Use fade.in instead.

Type:

(?id : string, ?duration : float, ?type : string, source(audio='a, 'b)) ->
source(audio='a, 'b)
where 'b is a set of tracks to be muxed into a source,
  'a is a track and a track of type: pcm, pcm_s16 or pcm_f32

Arguments:

• id (of type string, which defaults to "fade.initial")
• duration (of type float, which defaults to 3.0)
• type (of type string, which defaults to "lin")
• (unlabeled) (of type source(audio='a, 'b) where 'b is a set of tracks to be muxed into a source, 'a is a track and a track of type: pcm, pcm_s16 or pcm_f32)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

file.unlink

Deprecated: use file.remove instead.

Type:

(string) -> unit

Arguments:

• (unlabeled) (of type string)

garbage_collect

Deprecated: use runtime.gc.full_major instead

Type:

() -> unit

get_mime

Deprecated: use file.mime

Type:

(string) -> string

Arguments:

• (unlabeled) (of type string)

get_process_lines

Deprecated: use process.read.lines instead.

Type:

(?timeout : float, ?env : [string * string], ?inherit_env : bool,
 ?log_errors : bool, string) -> [string]

Arguments:

• timeout (of type float, which defaults to -1.0)
• env (of type [string * string], which defaults to [])
• inherit_env (of type bool, which defaults to true)
• log_errors (of type bool, which defaults to true)
• (unlabeled) (of type string)

get_process_output

Deprecated: use process.read instead.

Type:

(?timeout : float, ?env : [string * string], ?inherit_env : bool,
 ?log_errors : bool, string) -> string

Arguments:

• timeout (of type float, which defaults to -1.0)
• env (of type [string * string], which defaults to [])
• inherit_env (of type bool, which defaults to true)
• log_errors (of type bool, which defaults to true)
• (unlabeled) (of type string)

getenv

Deprecated: use environment.get

Type:

(?string, string) -> string

Arguments:

• (unlabeled) (of type string, which defaults to "")
• (unlabeled) (of type string)

getpid

Deprecated: use getpid

Type:

() -> int

gettimeofday

Deprecated: use time instead

Type:

() -> float

gmtime

Deprecated: use time.utc instead

Type:

(float?) -> unit

Arguments:

• (unlabeled) (of type float?)

Methods:

• day (of type int): Day of month.
• dst (of type bool): Daylight time savings in effect.
• hour (of type int): Hours.
• min (of type int): Minutes.
• month (of type int): Month of year.
• sec (of type int): Seconds.
• week_day (of type int): Day of week (Sunday is 0 or 7, Saturday is 6).
• year (of type int): Year.
• year_day (of type int): Day of year, between 1 and 366.

https.delete

Deprecated: use http.delete instead.

Type:

(?headers : [string * string], ?http_version : string?, ?redirect : bool,
 ?timeout : float?, ?normalize_url : bool?, string) -> unit

Arguments:

• headers (of type [string * string], which defaults to [])
• http_version (of type string?, which defaults to null)
• redirect (of type bool, which defaults to true)
• timeout (of type float?, which defaults to 10.0)
• normalize_url (of type bool?, which defaults to null)
• (unlabeled) (of type string)

Methods:

• headers (of type [string * string]): HTTP headers.
• http_version (of type string): Version of the HTTP protocol.
• status_code (of type int): Status code.
• status_message (of type string): Status message.

https.get

Deprecated: use http.get instead.

Type:

(?headers : [string * string], ?http_version : string?, ?redirect : bool,
 ?timeout : float?, ?normalize_url : bool?, string) -> string

Arguments:

• headers (of type [string * string], which defaults to [])
• http_version (of type string?, which defaults to null)
• redirect (of type bool, which defaults to true)
• timeout (of type float?, which defaults to 10.0)
• normalize_url (of type bool?, which defaults to null)
• (unlabeled) (of type string)

Methods:

• headers (of type [string * string]): HTTP headers.
• http_version (of type string): Version of the HTTP protocol.
• status_code (of type int): Status code.
• status_message (of type string): Status message.

https.head

Deprecated: use http.head instead.

Type:

(?headers : [string * string], ?http_version : string?, ?redirect : bool,
 ?timeout : float?, ?normalize_url : bool?, string) -> unit

Arguments:

• headers (of type [string * string], which defaults to [])
• http_version (of type string?, which defaults to null)
• redirect (of type bool, which defaults to true)
• timeout (of type float?, which defaults to 10.0)
• normalize_url (of type bool?, which defaults to null)
• (unlabeled) (of type string)

Methods:

• headers (of type [string * string]): HTTP headers.
• http_version (of type string): Version of the HTTP protocol.
• status_code (of type int): Status code.
• status_message (of type string): Status message.

https.post

Deprecated: use http.post instead.

Type:

(?data : {string}, ?headers : [string * string], ?http_version : string?,
 ?redirect : bool, ?timeout : float?, ?normalize_url : bool?, string) ->
string

Arguments:

• data (of type {string}, which defaults to "")
• headers (of type [string * string], which defaults to [])
• http_version (of type string?, which defaults to null)
• redirect (of type bool, which defaults to true)
• timeout (of type float?, which defaults to 10.0)
• normalize_url (of type bool?, which defaults to null)
• (unlabeled) (of type string)

Methods:

• headers (of type [string * string]): HTTP headers.
• http_version (of type string): Version of the HTTP protocol.
• status_code (of type int): Status code.
• status_message (of type string): Status message.

https.put

Deprecated: use http.put instead.

Type:

(?data : {string}, ?headers : [string * string], ?http_version : string?,
 ?redirect : bool, ?timeout : float?, ?normalize_url : bool?, string) ->
string

Arguments:

• data (of type {string}, which defaults to "")
• headers (of type [string * string], which defaults to [])
• http_version (of type string?, which defaults to null)
• redirect (of type bool, which defaults to true)
• timeout (of type float?, which defaults to 10.0)
• normalize_url (of type bool?, which defaults to null)
• (unlabeled) (of type string)

Methods:

• headers (of type [string * string]): HTTP headers.
• http_version (of type string): Version of the HTTP protocol.
• status_code (of type int): Status code.
• status_message (of type string): Status message.

id

Deprecated: this function will be removed in a future release

Type:

(?id : 'a?, 'b) -> 'b

Arguments:

• id (of type 'a?, which defaults to null)
• (unlabeled) (of type 'b)

in

Deprecated: use input instead.

Type:

(?id : string?, ?start : bool, ?on_start : (() -> unit),
 ?on_stop : (() -> unit), ?fallible : bool) -> source(audio=pcm('A))

Arguments:

• id (of type string?, which defaults to null)
• start (of type bool, which defaults to true)
• on_start (of type () -> unit, which defaults to {()})
• on_stop (of type () -> unit, which defaults to {()})
• fallible (of type bool, which defaults to false)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_started (of type () -> bool): true if the output or source is started.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• shutdown (of type () -> unit): Shutdown the output or source.
• skip (of type () -> unit): Skip to the next track.
• start (of type () -> unit): Ask the source or output to start.
• stop (of type () -> unit): Ask the source or output to stop.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

input.external

Deprecated: this function has been replaced by input.external.rawaudio.

Type:

(?id : string?, ?buffer : float, ?channels : int, ?max : float,
 ?restart : bool, ?restart_on_error : bool, ?samplerate : int, {string}) ->
source(audio=pcm('a))

Arguments:

• id (of type string?, which defaults to null)
• buffer (of type float, which defaults to 2.0)
• channels (of type int, which defaults to 2)
• max (of type float, which defaults to 10.0)
• restart (of type bool, which defaults to true)
• restart_on_error (of type bool, which defaults to false)
• samplerate (of type int, which defaults to 44100)
• (unlabeled) (of type {string})

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

input.https

Deprecated: use input.http instead

Type:

(?id : string?, ?debug : bool, ?deduplicate_metadata : bool,
 ?float_args : [string * float], ?format : string?,
 ?int_args : [string * int], ?max_buffer : float,
 ?metadata_filter : (([string * string]) -> [string * string])?,
 ?new_track_on_metadata : bool, ?on_connect : (([string * string]) -> unit),
 ?on_disconnect : (() -> unit),
 ?on_error : ((error
               .{
                 kind : string,
                 message : string,
                 trace : [
                          {
                            cstart : int,
                            cstop : int,
                            filename : string,
                            lstart : int,
                            lstop : int,
                            to_string : (?prefix : string) -> string
                          }]
               }) -> unit),
 ?on_start : (() -> unit), ?on_stop : (() -> unit), ?poll_delay : float,
 ?self_sync : {bool?}, ?start : bool, ?string_args : [string * string],
 ?timeout : float, ?trim_url : bool, ?user_agent : string, {string}) ->
source('a)

Arguments:

• id (of type string?, which defaults to null)
• debug (of type bool, which defaults to false)
• deduplicate_metadata (of type bool, which defaults to true)
• float_args (of type [string * float], which defaults to [])
• format (of type string?, which defaults to null)
• int_args (of type [string * int], which defaults to [])
• max_buffer (of type float, which defaults to 5.0)
• metadata_filter (of type (([string * string]) -> [string * string])?, which defaults to null)
• new_track_on_metadata (of type bool, which defaults to true)
• on_connect (of type ([string * string]) -> unit, which defaults to fun (_) -> ())
• on_disconnect (of type () -> unit, which defaults to {()})
• on_error (of type (error .{ kind : string, message : string, trace : [ { cstart : int, cstop : int, filename : string, lstart : int, lstop : int, to_string : (?prefix : string) -> string }] }) -> unit, which defaults to fun (_) -> ())
• on_start (of type () -> unit, which defaults to {()})
• on_stop (of type () -> unit, which defaults to {()})
• poll_delay (of type float, which defaults to 2.0)
• self_sync (of type {bool?}, which defaults to null)
• start (of type bool, which defaults to true)
• string_args (of type [string * string], which defaults to [])
• timeout (of type float, which defaults to 10.0)
• trim_url (of type bool, which defaults to true)
• user_agent (of type string, which defaults to "Liquidsoap/2.3.1+git@d2cc55985 (Unix; OCaml 4.14.2)")
• (unlabeled) (of type {string})

Methods:

• buffer_length (of type () -> float): Get the buffer’s length in seconds.
• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_started (of type () -> bool): true if the output or source is started.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• set_url (of type ({string}) -> unit): Set the source’s url.
• shutdown (of type () -> unit): Shutdown the output or source.
• skip (of type () -> unit): Skip to the next track.
• start (of type () -> unit): Ask the source or output to start.
• status (of type () -> string): Return the current status of the source, either “stopped” (the source isn’t trying to relay the HTTP stream), “starting” (polling task is about to begin) “polling” (attempting to connect to the HTTP stream), “connected ” (connected to , buffering or playing back the stream) or “stopping” (source is stopping).
• stop (of type () -> unit): Ask the source or output to stop.
• time (of type () -> float): Get a source’s time, based on its assigned clock.
• url (of type () -> string): Return the source’s current url.

json_of

Deprecated: use json.stringify instead

Type:

(?compact : bool, ?json5 : bool, 'a) -> string

Arguments:

• compact (of type bool, which defaults to false): Output compact text.
• json5 (of type bool, which defaults to false): Use json5 extended spec.
• (unlabeled) (of type 'a)

list.mem_assoc

Deprecated: use list.assoc.mem instead

Type:

('a, ['a * 'b]) -> bool where 'a is an orderable type

Arguments:

• (unlabeled) (of type anything that is an orderable type)
• (unlabeled) (of type ['a * 'b] where 'a is an orderable type)

localtime

Deprecated: use time.local instead

Type:

(float?) -> unit

Arguments:

• (unlabeled) (of type float?)

Methods:

• day (of type int): Day of month.
• dst (of type bool): Daylight time savings in effect.
• hour (of type int): Hours.
• min (of type int): Minutes.
• month (of type int): Month of year.
• sec (of type int): Seconds.
• week_day (of type int): Day of week (Sunday is 0 or 7, Saturday is 6).
• year (of type int): Year.
• year_day (of type int): Day of year, between 1 and 366.

map_metadata

Deprecated: use metadata.map

Type:

(?id : string?, ?update : bool, ?strip : bool, ?insert_missing : bool,
 (([string * string]) -> [string * string]), source('a)) -> source('a)
where 'a is a set of tracks to be muxed into a source

Arguments:

• id (of type string?, which defaults to "metadata.map")
• update (of type bool, which defaults to true)
• strip (of type bool, which defaults to false)
• insert_missing (of type bool, which defaults to true)
• (unlabeled) (of type ([string * string]) -> [string * string])
• (unlabeled) (of type source('a) where 'a is a set of tracks to be muxed into a source)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

merge_tracks

Deprecated: use source.tracks and source

Type:

(?id : string?, source('a)) -> source('a)
where 'a is a set of tracks to be muxed into a source

Arguments:

• id (of type string?, which defaults to null)
• (unlabeled) (of type source('a) where 'a is a set of tracks to be muxed into a source)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

mkavailable

Deprecated: use source.available instead.

Type:

(?id : string, ?track_sensitive : {bool}, ?active : {bool},
 ?available : {bool}, source('a)) -> source('a)

Arguments:

• id (of type string, which defaults to "mkavailable")
• track_sensitive (of type {bool}, which defaults to true)
• active (of type {bool}, which defaults to false)
• available (of type {bool}, which defaults to true)
• (unlabeled) (of type source('a))

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• selected (of type () -> source('A)?): Currently selected source.
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

mux_audio

Deprecated: use source.mux.audio.

Type:

(?id : string?, audio : source(audio='A, 'B), source('a)) -> source(audio='A,
'a) where 'a is a set of tracks to be muxed into a source, 'A is a track

Arguments:

• id (of type string?, which defaults to null)
• audio (of type source(audio='B, 'A) where 'B is a track)
• (unlabeled) (of type source('a) where 'a is a set of tracks to be muxed into a source)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

mux_midi

Deprecated: use source.mux.midi

Type:

(?id : string?, midi : source(midi='A, 'B), source('a)) -> source(midi='A,
'a) where 'a is a set of tracks to be muxed into a source, 'A is a track

Arguments:

• id (of type string?, which defaults to null)
• midi (of type source(midi='B, 'A) where 'B is a track)
• (unlabeled) (of type source('a) where 'a is a set of tracks to be muxed into a source)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

mux_video

Deprecated: use source.mux.video.

Type:

(?id : string?, video : source(video='A, 'B), source('a)) -> source(video='A,
'a) where 'a is a set of tracks to be muxed into a source, 'A is a track

Arguments:

• id (of type string?, which defaults to null)
• video (of type source(video='B, 'A) where 'B is a track)
• (unlabeled) (of type source('a) where 'a is a set of tracks to be muxed into a source)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

of_json

Deprecated: use json.parse instead

Type:

(default : 'a, string) -> 'a

Arguments:

• default (of type 'a): Default value if string cannot be parsed.
• (unlabeled) (of type string)

on_blank

Deprecated: use blank.detect instead

Type:

(?id : string?, ?max_blank : {float}, ?min_noise : {float},
 ?on_noise : (() -> unit), ?start_blank : bool, ?threshold : {float},
 ?track_sensitive : {bool}, (() -> unit), source(audio=pcm('a), 'b)) ->
source(audio=pcm('a), 'b)

Arguments:

• id (of type string?, which defaults to null)
• max_blank (of type {float}, which defaults to 20.0)
• min_noise (of type {float}, which defaults to 0.0)
• on_noise (of type () -> unit, which defaults to {()})
• start_blank (of type bool, which defaults to false)
• threshold (of type {float}, which defaults to -40.0)
• track_sensitive (of type {bool}, which defaults to true)
• (unlabeled) (of type () -> unit)
• (unlabeled) (of type source(audio=pcm('a), 'b))

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• dB_levels (of type () -> [float]?): Return the detected dB level for each channel.
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_blank (of type () -> bool): Indicate whether blank was detected.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

on_end

Deprecated: use source.on_end instead.

Type:

(?id : string?, ?delay : {float}, source('a),
 ((float, [string * string]) -> unit)) -> source('a)

Arguments:

• id (of type string?, which defaults to null)
• delay (of type {float}, which defaults to 5.0)
• (unlabeled) (of type source('a))
• (unlabeled) (of type (float, [string * string]) -> unit)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

out

Deprecated: use output instead.

Type:

(source(audio=pcm('A))) -> unit

Arguments:

• (unlabeled) (of type source(audio=pcm('A)))

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_started (of type () -> bool): true if the output or source is started.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• shutdown (of type () -> unit): Shutdown the output or source.
• skip (of type () -> unit): Skip to the next track.
• start (of type () -> unit): Ask the source or output to start.
• stop (of type () -> unit): Ask the source or output to stop.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

output.preferred

Type:

(?id : string?, ?fallible : bool, ?on_start : (() -> unit),
 ?on_stop : (() -> unit), ?start : bool, source(audio=pcm('A))) -> unit

Arguments:

• id (of type string?, which defaults to null)
• fallible (of type bool, which defaults to false)
• on_start (of type () -> unit, which defaults to {()})
• on_stop (of type () -> unit, which defaults to {()})
• start (of type bool, which defaults to true)
• (unlabeled) (of type source(audio=pcm('A)))

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_started (of type () -> bool): true if the output or source is started.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• shutdown (of type () -> unit): Shutdown the output or source.
• skip (of type () -> unit): Skip to the next track.
• start (of type () -> unit): Ask the source or output to start.
• stop (of type () -> unit): Ask the source or output to stop.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

playlist.once

Deprecated: this function has been replaced with playlist, setting reload_mode argument to "never" and loop to false.

Type:

(?id : string?, ?random : bool, ?reload_mode : string, ?prefetch : int,
 ?filter : ((request) -> bool), string) -> source('a)

Arguments:

• id (of type string?, which defaults to null)
• random (of type bool, which defaults to false)
• reload_mode (of type string, which defaults to "")
• prefetch (of type int, which defaults to 1)
• filter (of type (request) -> bool, which defaults to fun (_) -> true)
• (unlabeled) (of type string)

Methods:

• add (of type (request) -> bool): Add a request to the queue. Requests are resolved before being added. Returns true if the request was successfully added.
• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• current (of type () -> request?): Get the request currently being played.
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• fetch (of type () -> bool): Try feeding the queue with a new request. Returns true if successful. This method can take long to return and should usually be run in a separate thread.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• length (of type () -> int):
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• queue (of type () -> [request]): Get the requests currently in the queue.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• reload (of type (?empty_queue : bool, ?uri : string?) -> unit):
• remaining (of type () -> float): Estimation of remaining time in the current track.
• remaining_files (of type () -> [string]):
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• set_queue (of type ([request]) -> unit): Set the queue of requests. Requests are resolved before being added to the queue. You are responsible for destroying the requests currently in the queue.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

playlist.reloadable

Deprecated: use playlist instead

Type:

(?id : string?, ?mime_type : string, ?mode : string,
 ?on_track : (() -> unit), ?prefix : string, ?reload : int,
 ?reload_mode : string, string) -> source('a)

Arguments:

• id (of type string?, which defaults to null)
• mime_type (of type string, which defaults to "")
• mode (of type string, which defaults to "randomize")
• on_track (of type () -> unit, which defaults to {()})
• prefix (of type string, which defaults to "")
• reload (of type int, which defaults to 0)
• reload_mode (of type string, which defaults to "seconds")
• (unlabeled) (of type string)

Methods:

• add (of type (request) -> bool): Add a request to the queue. Requests are resolved before being added. Returns true if the request was successfully added.
• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• current (of type () -> request?): Get the request currently being played.
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• fetch (of type () -> bool): Try feeding the queue with a new request. Returns true if successful. This method can take long to return and should usually be run in a separate thread.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• length (of type () -> int):
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• queue (of type () -> [request]): Get the requests currently in the queue.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• reload (of type (?empty_queue : bool, ?uri : string?) -> unit):
• remaining (of type () -> float): Estimation of remaining time in the current track.
• remaining_files (of type () -> [string]):
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• set_queue (of type ([request]) -> unit): Set the queue of requests. Requests are resolved before being added to the queue. You are responsible for destroying the requests currently in the queue.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

playlist.safe

Deprecated: use mksafe and playlist instead.

Type:

(?id : string?, ?mime_type : string, ?mode : string,
 ?on_track : (() -> unit), ?prefix : string, ?reload : int,
 ?reload_mode : string, string) -> source('a)
where 'a is a set of internal tracks

Arguments:

• id (of type string?, which defaults to null)
• mime_type (of type string, which defaults to "")
• mode (of type string, which defaults to "randomize")
• on_track (of type () -> unit, which defaults to {()})
• prefix (of type string, which defaults to "")
• reload (of type int, which defaults to 0)
• reload_mode (of type string, which defaults to "seconds")
• (unlabeled) (of type string)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• selected (of type () -> source('A)? where 'A is a set of internal tracks): Currently selected source.
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

quote

Deprecated: this function has been replaced by string.quote.

Type:

(string) -> string

Arguments:

• (unlabeled) (of type string)

request.create.raw

Deprecated: use request.create instead.

Type:

(?cue_in_metadata : string?, ?cue_out_metadata : string?, ?persistent : bool,
 ?resolve_metadata : bool, ?excluded_metadata_resolvers : [string],
 ?temporary : bool, string) -> request

Arguments:

• cue_in_metadata (of type string?, which defaults to "liq_cue_in")
• cue_out_metadata (of type string?, which defaults to "liq_cue_out")
• persistent (of type bool, which defaults to false)
• resolve_metadata (of type bool, which defaults to true)
• excluded_metadata_resolvers (of type [string], which defaults to [])
• temporary (of type bool, which defaults to false)
• (unlabeled) (of type string)

request.dynamic.list

Deprecated: use request.dynamic instead

Type:

(?id : string?, ?available : {bool}, ?prefetch : int?,
 ?retry_delay : {float}, ?synchronous : bool, ?timeout : float?,
 ?native : bool, (() -> [request])) -> source('a)

Arguments:

• id (of type string?, which defaults to null)
• available (of type {bool}, which defaults to true)
• prefetch (of type int?, which defaults to null)
• retry_delay (of type {float}, which defaults to 0.1)
• synchronous (of type bool, which defaults to false)
• timeout (of type float?, which defaults to null)
• native (of type bool, which defaults to false)
• (unlabeled) (of type () -> [request])

Methods:

• add (of type (request) -> bool): Add a request to the queue. Requests are resolved before being added. Returns true if the request was successfully added.
• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• current (of type () -> request?): Get the request currently being played.
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• fetch (of type () -> bool): Try feeding the queue with a new request. Returns true if successful. This method can take long to return and should usually be run in a separate thread.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• queue (of type () -> [request]): Get the requests currently in the queue.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• set_queue (of type ([request]) -> unit): Set the queue of requests. Requests are resolved before being added to the queue. You are responsible for destroying the requests currently in the queue.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

request.ready

Deprecated: use request.resolved

Type:

(request) -> bool

Arguments:

• (unlabeled) (of type request)

rewrite_metadata

Deprecated: this function has been replaced by metadata.map.

Type:

([string * string], ?insert_missing : bool, ?update : bool, ?strip : bool,
 source('a)) -> source('a)
where 'a is a set of tracks to be muxed into a source

Arguments:

• (unlabeled) (of type [string * string])
• insert_missing (of type bool, which defaults to true)
• update (of type bool, which defaults to true)
• strip (of type bool, which defaults to false)
• (unlabeled) (of type source('a) where 'a is a set of tracks to be muxed into a source)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

run_process

Deprecated: use process.run instead

Type:

(?env : [string * string], ?inherit_env : bool, ?stdin : string,
 ?rwdirs : [string], ?rodirs : [string], ?network : bool?, ?timeout : float?,
 string) -> string * string * (string * string)

Arguments:

• env (of type [string * string], which defaults to [])
• inherit_env (of type bool, which defaults to true)
• stdin (of type string, which defaults to "")
• rwdirs (of type [string], which defaults to ["default"])
• rodirs (of type [string], which defaults to ["default"])
• network (of type bool?, which defaults to null)
• timeout (of type float?, which defaults to null)
• (unlabeled) (of type string)

say_metadata

Deprecated: use source.say_metadata instead

Type:

(source('a), pattern : string) -> source('a) where 'a is an orderable type

Arguments:

• (unlabeled) (of type source('a) where 'a is an orderable type)
• pattern (of type string)

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• cancel_pending (of type () -> unit):
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• pending (of type () -> source('A)? where 'A is an orderable type):
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• selected (of type () -> source('A)? where 'A is an orderable type): Currently selected source.
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• set_pending (of type (source('A)?) -> unit where 'A is an orderable type):
• skip (of type (?cancel_pending : bool) -> unit):
• time (of type () -> float): Get a source’s time, based on its assigned clock.

setenv

Deprecated: use environment.set

Type:

(string, string) -> unit

Arguments:

• (unlabeled) (of type string)
• (unlabeled) (of type string)

skip_blank

Deprecated: use blank.skip instead

Type:

(?id : string?, ?threshold : float, ?max_blank : float, ?min_noise : float,
 ?track_sensitive : bool, source(audio=pcm('a), 'b).{skip : () -> unit}) ->
source(audio=pcm('a), 'b)

Arguments:

• id (of type string?, which defaults to "blank.skip")
• threshold (of type float, which defaults to -40.0)
• max_blank (of type float, which defaults to 20.0)
• min_noise (of type float, which defaults to 0.0)
• track_sensitive (of type bool, which defaults to true)
• (unlabeled) (of type source(audio=pcm('a), 'b).{skip : () -> unit})

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• dB_levels (of type () -> [float]?): Return the detected dB level for each channel.
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_blank (of type () -> bool): Indicate whether blank was detected.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

sleep

Deprecated: use thread.pause

Type:

(float) -> unit

Arguments:

• (unlabeled) (of type float)

string.utf8.escape

Deprecated: this function has been replaced by string.escape.

Type:

(string) -> string

Arguments:

• (unlabeled) (of type string)

string_of

Deprecated: use string.

Type:

('a) -> string

Arguments:

• (unlabeled) (of type 'a)

string_of_float

Deprecated: use string.float.

Type:

(float) -> string

Arguments:

• (unlabeled) (of type float)

strip_blank

Deprecated: use blank.strip instead

Type:

(?id : string?, ?max_blank : {float}, ?min_noise : {float},
 ?start_blank : bool, ?threshold : {float}, ?track_sensitive : {bool},
 source(audio=pcm('a), 'b)) -> source(audio=pcm('a), 'b)

Arguments:

• id (of type string?, which defaults to null)
• max_blank (of type {float}, which defaults to 20.0)
• min_noise (of type {float}, which defaults to 0.0)
• start_blank (of type bool, which defaults to false)
• threshold (of type {float}, which defaults to -40.0)
• track_sensitive (of type {bool}, which defaults to true)
• (unlabeled) (of type source(audio=pcm('a), 'b))

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• dB_levels (of type () -> [float]?): Return the detected dB level for each channel.
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_blank (of type () -> bool): Indicate whether blank was detected.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

system

Deprecated: use process.run instead.

Type:

(string) -> unit

Arguments:

• (unlabeled) (of type string)

Methods:

• status (of type string.{code : int, description : string}): Status when process ended, can be one of "exit" (the program exited, the status code is then relevant), "killed" (the program was killed by signal given in status code), "stopped" (the program was stopped by signal given in status code) or "exception" (the program raised and exception detailed in the description).
• stderr (of type string): Messages written by process on standard error stream.
• stdout (of type string): Messages written by process on standard output stream.

test_process

Deprecated: use process.test instead.

Type:

(?timeout : float, ?env : [string * string], ?inherit_env : bool, string) ->
bool

Arguments:

• timeout (of type float, which defaults to -1.0)
• env (of type [string * string], which defaults to [])
• inherit_env (of type bool, which defaults to true)
• (unlabeled) (of type string)

video.line

Deprecated: use video.add_line.

Type:

(?id : string?, ?alpha : {float}, ?color : {int}, {int * int}, {int * int},
 source(video=canvas('a), 'b)) -> source(video=canvas('a), 'b)

Arguments:

• id (of type string?, which defaults to null)
• alpha (of type {float}, which defaults to 1.0)
• color (of type {int}, which defaults to 0)
• (unlabeled) (of type {int * int})
• (unlabeled) (of type {int * int})
• (unlabeled) (of type source(video=canvas('a), 'b))

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

video.rectangle

Deprecated: use video.add_rectangle.

Type:

(?id : string?, ?alpha : {float}, ?color : {int}, height : {int},
 width : {int}, ?x : {int}, ?y : {int}, source(video=canvas('a), 'b)) ->
source(video=canvas('a), 'b)

Arguments:

• id (of type string?, which defaults to null)
• alpha (of type {float}, which defaults to 1.0)
• color (of type {int}, which defaults to 0)
• height (of type {int})
• width (of type {int})
• x (of type {int}, which defaults to 0)
• y (of type {int}, which defaults to 0)
• (unlabeled) (of type source(video=canvas('a), 'b))

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

video.transparent

Deprecated: use video.alpha.of_color

Type:

(?id : string?, ?color : int, ?precision : float, source(video=canvas('a),
 'b)) -> source(video=canvas('a), 'b)

Arguments:

• id (of type string?, which defaults to null)
• color (of type int, which defaults to 0)
• precision (of type float, which defaults to 0.2)
• (unlabeled) (of type source(video=canvas('a), 'b))

Methods:

• buffered (of type () -> [string * float]): Length of buffered data.
• clock (of type clock): The source’s clock
• duration (of type () -> float): Estimation of the duration of the current track.
• elapsed (of type () -> float): Elapsed time in the current track.
• fallible (of type bool): Indicate if a source may fail, i.e. may not be ready to stream.
• id (of type () -> string): Identifier of the source.
• is_active (of type () -> bool): true if the source is active, i.e. it is continuously animated by its own clock whenever it is ready. Typically, true for outputs and sources such as input.http.
• is_ready (of type () -> bool): Indicate if a source is ready to stream. This does not mean that the source is currently streaming, just that its resources are all properly initialized.
• is_up (of type () -> bool): Indicate that the source can be asked to produce some data at any time. This is true when the source is currently being used or if it could be used at any time, typically inside a switch or fallback.
• last_metadata (of type () -> [string * string]?): Return the last metadata from the source.
• log (of type {level : (() -> int?).{set : (int) -> unit}}): Get or set the source’s log level, from 1 to 5.
• on_metadata (of type ((([string * string]) -> unit)) -> unit): Call a given handler on metadata packets.
• on_shutdown (of type ((() -> unit)) -> unit): Register a function to be called when source shuts down.
• on_track (of type ((([string * string]) -> unit)) -> unit): Call a given handler on new tracks.
• on_wake_up (of type ((() -> unit)) -> unit): Register a function to be called after the source is asked to get ready. This is when, for instance, the source’s final ID is set.
• register_command (of type (?usage : string?, description : string, string, ((string) -> string)) -> unit): Register a server command for this source. Command is registered under the source’s id namespace when it gets up and de-registered when it gets down.
• remaining (of type () -> float): Estimation of remaining time in the current track.
• reset_last_metadata_on_track (of type (() -> bool).{set : (bool) -> unit}): If true, the source’s last_metadata is reset on each new track. If a metadata is present along with the track mark, then it becomes the new last_metadata, otherwise, last_metadata becomesnull`.
• seek (of type (float) -> float): Seek forward, in seconds (returns the amount of time effectively seeked).
• self_sync (of type () -> bool): Is the source currently controlling its own real-time loop.
• skip (of type () -> unit): Skip to the next track.
• time (of type () -> float): Get a source’s time, based on its assigned clock.

which

Deprecated: this function has been replaced by file.which.

Type:

(string) -> string

Arguments:

• (unlabeled) (of type string)