godot/doc/classes/AudioStreamPlayback.xml

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<?xml version="1.0" encoding="UTF-8" ?>
<class name="AudioStreamPlayback" inherits="RefCounted" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
<brief_description>
Meta class for playing back audio.
</brief_description>
<description>
Can play, loop, pause a scroll through audio. See [AudioStream] and [AudioStreamOggVorbis] for usage.
</description>
<tutorials>
<link title="Audio Generator Demo">https://godotengine.org/asset-library/asset/526</link>
</tutorials>
<methods>
<method name="_get_loop_count" qualifiers="virtual const">
<return type="int" />
<description>
Overridable method. Should return how many times this audio stream has looped. Most built-in playbacks always return [code]0[/code].
</description>
</method>
Implement audio stream playback parameters. Implements a way for audio stream playback to be configured via parameters directly in the edited AudioStreamPlayer[2D/3D]. Currently, configuring the playback stream is not possible (or is sometimes hacky as the user has to obtain the currently played stream, which is not always immediately available). This PR only implements this new feature to control looping in stream playback instances (a commonly requested feature, which was lost in the transition from Godot 2 to Godot 3). But the idea is that it can do a lot more: * If effects are bundled to the stream, control per playback instance parameters such as cutoff or resoance, or any other exposed effect parameter per playback instance. * For the upcoming interactive music PR (#64488), this exposes an easy way to change the active clip, which was not possible before. * For the upcoming parametrizable audio support (https://github.com/godotengine/godot-proposals/issues/3394) this allows editing and animating audio graph parameters. In any case, this PR is required to complete #64488. Update modules/vorbis/audio_stream_ogg_vorbis.h Co-authored-by: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com> Update modules/minimp3/audio_stream_mp3.h Co-authored-by: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com> Update modules/minimp3/audio_stream_mp3.h Co-authored-by: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com> Update modules/vorbis/audio_stream_ogg_vorbis.h Co-authored-by: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com> Update doc/classes/AudioStream.xml Co-authored-by: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com>
2023-12-23 16:30:32 +00:00
<method name="_get_parameter" qualifiers="virtual const">
<return type="Variant" />
<param index="0" name="name" type="StringName" />
<description>
Return the current value of a playback parameter by name (see [method AudioStream._get_parameter_list]).
</description>
</method>
<method name="_get_playback_position" qualifiers="virtual const">
<return type="float" />
<description>
Overridable method. Should return the current progress along the audio stream, in seconds.
</description>
</method>
<method name="_is_playing" qualifiers="virtual const">
<return type="bool" />
<description>
Overridable method. Should return [code]true[/code] if this playback is active and playing its audio stream.
</description>
</method>
<method name="_mix" qualifiers="virtual">
<return type="int" />
<param index="0" name="buffer" type="AudioFrame*" />
<param index="1" name="rate_scale" type="float" />
<param index="2" name="frames" type="int" />
<description>
Override this method to customize how the audio stream is mixed. This method is called even if the playback is not active.
[b]Note:[/b] It is not useful to override this method in GDScript or C#. Only GDExtension can take advantage of it.
</description>
</method>
<method name="_seek" qualifiers="virtual">
<return type="void" />
<param index="0" name="position" type="float" />
<description>
Override this method to customize what happens when seeking this audio stream at the given [param position], such as by calling [method AudioStreamPlayer.seek].
</description>
</method>
Implement audio stream playback parameters. Implements a way for audio stream playback to be configured via parameters directly in the edited AudioStreamPlayer[2D/3D]. Currently, configuring the playback stream is not possible (or is sometimes hacky as the user has to obtain the currently played stream, which is not always immediately available). This PR only implements this new feature to control looping in stream playback instances (a commonly requested feature, which was lost in the transition from Godot 2 to Godot 3). But the idea is that it can do a lot more: * If effects are bundled to the stream, control per playback instance parameters such as cutoff or resoance, or any other exposed effect parameter per playback instance. * For the upcoming interactive music PR (#64488), this exposes an easy way to change the active clip, which was not possible before. * For the upcoming parametrizable audio support (https://github.com/godotengine/godot-proposals/issues/3394) this allows editing and animating audio graph parameters. In any case, this PR is required to complete #64488. Update modules/vorbis/audio_stream_ogg_vorbis.h Co-authored-by: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com> Update modules/minimp3/audio_stream_mp3.h Co-authored-by: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com> Update modules/minimp3/audio_stream_mp3.h Co-authored-by: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com> Update modules/vorbis/audio_stream_ogg_vorbis.h Co-authored-by: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com> Update doc/classes/AudioStream.xml Co-authored-by: A Thousand Ships <96648715+AThousandShips@users.noreply.github.com>
2023-12-23 16:30:32 +00:00
<method name="_set_parameter" qualifiers="virtual">
<return type="void" />
<param index="0" name="name" type="StringName" />
<param index="1" name="value" type="Variant" />
<description>
Set the current value of a playback parameter by name (see [method AudioStream._get_parameter_list]).
</description>
</method>
<method name="_start" qualifiers="virtual">
<return type="void" />
<param index="0" name="from_pos" type="float" />
<description>
Override this method to customize what happens when the playback starts at the given position, such as by calling [method AudioStreamPlayer.play].
</description>
</method>
<method name="_stop" qualifiers="virtual">
<return type="void" />
<description>
Override this method to customize what happens when the playback is stopped, such as by calling [method AudioStreamPlayer.stop].
</description>
</method>
<method name="_tag_used_streams" qualifiers="virtual">
<return type="void" />
<description>
Overridable method. Called whenever the audio stream is mixed if the playback is active and [method AudioServer.set_enable_tagging_used_audio_streams] has been set to [code]true[/code]. Editor plugins may use this method to "tag" the current position along the audio stream and display it in a preview.
</description>
</method>
</methods>
</class>