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VideoStreamPlayback¶

Inherits: 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.

Methods¶

int	_get_channels ( ) virtual const
float	_get_length ( ) virtual const
int	_get_mix_rate ( ) virtual const
float	_get_playback_position ( ) virtual const
Texture2D	_get_texture ( ) virtual const
bool	_is_paused ( ) virtual const
bool	_is_playing ( ) virtual const
void	_play ( ) virtual
void	_seek ( float time ) virtual
void	_set_audio_track ( int idx ) virtual
void	_set_paused ( bool paused ) virtual
void	_stop ( ) virtual
void	_update ( float delta ) virtual
int	mix_audio ( int num_frames, PackedFloat32Array buffer=PackedFloat32Array(), int offset=0 )

Method Descriptions¶

int _get_channels ( ) virtual const

Returns the number of audio channels.

float _get_length ( ) virtual const

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

int _get_mix_rate ( ) virtual const

Returns the audio sample rate used for mixing.

float _get_playback_position ( ) virtual const

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

Texture2D _get_texture ( ) virtual const

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

bool _is_paused ( ) virtual const

Returns the paused status, as set by _set_paused.

bool _is_playing ( ) virtual const

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

void _play ( ) virtual

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 ( float time ) virtual

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

void _set_audio_track ( int idx ) virtual

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

void _set_paused ( bool paused ) virtual

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

void _stop ( ) virtual

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

void _update ( float delta ) virtual

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

int mix_audio ( int num_frames, PackedFloat32Array buffer=PackedFloat32Array(), int offset=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.