AudioStream

继承： Resource < RefCounted < Object

派生： AudioStreamGenerator, AudioStreamInteractive, AudioStreamMicrophone, AudioStreamMP3, AudioStreamOggVorbis, AudioStreamPlaylist, AudioStreamPolyphonic, AudioStreamRandomizer, AudioStreamSynchronized, AudioStreamWAV

Base class for audio streams.

描述

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.

方法

信号

parameter_list_changed ( )

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

方法说明

int _get_beat_count ( ) virtual¹ const²

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 ( ) virtual¹ const²

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 ( ) virtual¹ const²

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

Array Dictionary _get_parameter_list ( ) virtual¹ const²

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 ( ) virtual¹ const²

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

AudioStreamPlayback _instantiate_playback ( ) virtual¹ const²

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

bool _is_monophonic ( ) virtual¹ const²

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 ( ) const²

实验性： 未来版本中可能会修改或移除该方法。

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

AudioSample generate_sample ( ) const²

实验性： 未来版本中可能会修改或移除该方法。

Generates an AudioSample based on the current stream.

float get_length ( ) const²

Returns the length of the audio stream in seconds.

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 ( ) const²

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

bool is_monophonic ( ) const²

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