VideoStreamPlayback

继承： Resource < RefCounted < Object

Internal class used by VideoStream to manage playback state when played from a VideoStreamPlayer.

描述

This class is intended to be overridden by video decoder extensions with custom implementations of VideoStream.

方法

方法说明

int _get_channels ( ) virtual¹ const²

Returns the number of audio channels.

float _get_length ( ) virtual¹ const²

Returns the video duration in seconds, if known, or 0 if unknown.

int _get_mix_rate ( ) virtual¹ const²

Returns the audio sample rate used for mixing.

float _get_playback_position ( ) virtual¹ const²

Return the current playback timestamp. Called in response to the VideoStreamPlayer.stream_position getter.

Texture2D _get_texture ( ) virtual¹ const²

Allocates a Texture2D in which decoded video frames will be drawn.

bool _is_paused ( ) virtual¹ const²

Returns the paused status, as set by _set_paused.

bool _is_playing ( ) virtual¹ const²

Returns the playback state, as determined by calls to _play and _stop.

void _play ( ) virtual¹

Called in response to VideoStreamPlayer.autoplay or VideoStreamPlayer.play. Note that manual playback may also invoke _stop multiple times before this method is called. _is_playing should return true once playing.

void _seek ( time: float ) virtual¹

Seeks to time seconds. Called in response to the VideoStreamPlayer.stream_position setter.

void _set_audio_track ( idx: int ) virtual¹

Select the audio track idx. Called when playback starts, and in response to the VideoStreamPlayer.audio_track setter.

void _set_paused ( paused: bool ) virtual¹

Set the paused status of video playback. _is_paused must return paused. Called in response to the VideoStreamPlayer.paused setter.

void _stop ( ) virtual¹

Stops playback. May be called multiple times before _play, or in response to VideoStreamPlayer.stop. _is_playing should return false once stopped.

void _update ( delta: float ) virtual¹

Ticks video playback for delta seconds. Called every frame as long as _is_paused and _is_playing return true.

int mix_audio ( num_frames: int, buffer: PackedFloat32Array = PackedFloat32Array(), offset: int = 0 )

Render num_frames audio frames (of _get_channels floats each) from buffer, starting from index offset in the array. Returns the number of audio frames rendered, or -1 on error.