Class reference

AudioStream

Inherits Resource

Base class for audio streams.

Description

Base class for audio streams. Audio streams are used for sound effects and music playback, and support WAV (via AudioStreamWAV) and Ogg (via AudioStreamOggVorbis) file formats.

Methods

`int _get_bar_beats() virtual const`

Override this method to return the bar beats of this stream.

`int _get_beat_count() virtual const`

Overridable method. Should return the total number of beats of this audio stream. Used by the engine to determine the position of every beat. Ideally, the returned value should be based off the stream's sample rate (AudioStreamWAV.mix_rate, for example).

`float _get_bpm() virtual const`

Overridable method. Should return the tempo of this audio stream, in beats per minute (BPM). Used by the engine to determine the position of every beat. Ideally, the returned value should be based off the stream's sample rate (AudioStreamWAV.mix_rate, for example).

`float _get_length() virtual const`

Override this method to customize the returned value of get_length(). Should return the length of this audio stream, in seconds.

`Dictionary[] _get_parameter_list() virtual const`

Return the controllable parameters of this stream. This array contains dictionaries with a property info description format (see Object.get_property_list()). Additionally, the default value for this parameter must be added tho each dictionary in "default_value" field.

`String _get_stream_name() virtual const`

Override this method to customize the name assigned to this audio stream. Unused by the engine.

`Dictionary _get_tags() virtual const`

Override this method to customize the tags for this audio stream. Should return a Dictionary of strings with the tag as the key and its content as the value. Commonly used tags include title, artist, album, tracknumber, and date.

`bool _has_loop() virtual const`

Override this method to return true if this stream has a loop.

`AudioStreamPlayback _instantiate_playback() virtual const`

Override this method to customize the returned value of instantiate_playback(). Should return a new AudioStreamPlayback created when the stream is played (such as by an AudioStreamPlayer).

`bool _is_monophonic() virtual const`

Override this method to customize the returned value of is_monophonic(). Should return true if this audio stream only supports one channel.

`bool can_be_sampled() const`

Experimental.

Returns if the current AudioStream can be used as a sample. Only static streams can be sampled.

`AudioSample generate_sample() const`

Experimental.

Generates an AudioSample based on the current stream.

`float get_length() const`

Returns the length of the audio stream in seconds. If this stream is an AudioStreamRandomizer, returns the length of the last played stream. If this stream has an indefinite length (such as for AudioStreamGenerator and AudioStreamMicrophone), returns 0.0.

`AudioStreamPlayback instantiate_playback()`

Returns a newly created AudioStreamPlayback intended to play this audio stream. Useful for when you want to extend _instantiate_playback() but call instantiate_playback() from an internally held AudioStream subresource. An example of this can be found in the source code for AudioStreamRandomPitch::instantiate_playback.

`bool is_meta_stream() const`

Returns true if the stream is a collection of other streams, false otherwise.

`bool is_monophonic() const`

Returns true if this audio stream only supports one channel (monophony), or false if the audio stream supports two or more channels (polyphony).

Signals

`parameter_list_changed()`

Signal to be emitted to notify when the parameter list changed.

Tutorials

Source revision 4f5b14abade2