The Transport class represents the transport controls and state for an audio engine. More...

#include <src/dsp/transport.h>

Inheritance diagram for zrythm::dsp::Transport:

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Collaboration diagram for zrythm::dsp::Transport:

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Data Structures
struct	ConfigProvider
class	TransportSnapshot

Public Types
enum class	Display { BBT , Time }
	Corrseponts to "transport-display" in the gsettings. More...
enum class	RecordingMode { OverwriteEvents , MergeEvents , Takes , TakesMuted }
	Recording mode for MIDI and audio. More...
Public Types inherited from zrythm::dsp::ITransport
enum class	PlayState : std::uint8_t { RollRequested , Rolling , PauseRequested , Paused }

Public Member Functions
	Transport (const dsp::TempoMap &tempo_map, const dsp::SnapGrid &snap_grid, ConfigProvider config_provider, QObject *parent=nullptr)
bool	loopEnabled () const
void	setLoopEnabled (bool enabled)
Q_SIGNAL void	loopEnabledChanged (bool enabled)
bool	recordEnabled () const
void	setRecordEnabled (bool enabled)
Q_SIGNAL void	recordEnabledChanged (bool enabled)
bool	punchEnabled () const
void	setPunchEnabled (bool enabled)
Q_SIGNAL void	punchEnabledChanged (bool enabled)
PlayState	getPlayState () const
void	setPlayState (PlayState state)
Q_SIGNAL void	playStateChanged (PlayState state)
dsp::PlayheadQmlWrapper *	playhead () const
dsp::AtomicPositionQmlAdapter *	cuePosition () const
dsp::AtomicPositionQmlAdapter *	loopStartPosition () const
dsp::AtomicPositionQmlAdapter *	loopEndPosition () const
dsp::AtomicPositionQmlAdapter *	punchInPosition () const
dsp::AtomicPositionQmlAdapter *	punchOutPosition () const
Q_INVOKABLE void	moveBackward ()
Q_INVOKABLE void	moveForward ()
Q_INVOKABLE void	requestPause ()
	Request pause.
Q_INVOKABLE void	requestRoll ()
	Request playback.
units::sample_t	get_playhead_position_in_audio_thread () const noexcept override
	Get the playhead position.
std::pair< units::sample_t, units::sample_t >	get_loop_range_positions () const noexcept override
	Returns the loop range positions in samples.
std::pair< units::sample_t, units::sample_t >	get_punch_range_positions () const noexcept override
	Returns the punch recording range positions in samples.
PlayState	get_play_state () const noexcept override
bool	loop_enabled () const noexcept override
bool	punch_enabled () const noexcept override
bool	recording_enabled () const noexcept override
	Returns whether recording is enabled.
units::sample_t	recording_preroll_frames_remaining () const noexcept override
	Frames remaining to preroll (playing back some time earlier before actually recording/rolling).
units::sample_t	metronome_countin_frames_remaining () const noexcept override
	Frames remaining for metronome countin.
Q_INVOKABLE bool	isRolling () const
Q_INVOKABLE bool	isPaused () const
void	add_to_playhead_in_audio_thread (units::sample_t nframes)
	Moves the playhead by the time corresponding to given samples, taking into account the loop end point.
void	set_play_state_rt_safe (PlayState state)
void	move_playhead (units::precise_tick_t target_ticks, bool set_cue_point)
	Moves playhead to given pos.
void	goto_prev_or_next_marker (bool prev, RangeOf< units::precise_tick_t > auto &&extra_markers)
	Moves the playhead to the previous or next marker.
void	set_loop_range (bool start, units::precise_tick_t start_pos, units::precise_tick_t pos, bool snap)
	Set the loop range.
bool	position_is_inside_punch_range (units::sample_t pos)
auto	playhead_ticks_before_pause () const
void	consume_metronome_countin_samples (units::sample_t samples)
	For engine use only.
void	consume_recording_preroll_samples (units::sample_t samples)
	For engine use only.
auto	get_snapshot () const
Public Member Functions inherited from zrythm::dsp::ITransport
units::sample_t	get_playhead_position_after_adding_frames_in_audio_thread (const units::sample_t current_playhead_position, const units::sample_t frames_to_add) const noexcept
	Gets the playhead position, similarly to get_playhead_position(), except that it adjusts the new position if the loop end point was crossed.
bool	has_recording_preroll_frames_remaining () const noexcept
units::sample_t	is_loop_point_met_in_audio_thread (units::sample_t g_start_frames, units::sample_t nframes) const noexcept
	Returns the number of processable frames until and excluding the loop end point as a positive number (>= 1) if the loop point was met between g_start_frames and (g_start_frames + nframes), otherwise returns 0;.

Properties
QML_ELEMENT bool	loopEnabled
bool	recordEnabled
bool	punchEnabled
PlayState	playState
zrythm::dsp::PlayheadQmlWrapper *	playhead
zrythm::dsp::AtomicPositionQmlAdapter *	cuePosition
zrythm::dsp::AtomicPositionQmlAdapter *	loopStartPosition
zrythm::dsp::AtomicPositionQmlAdapter *	loopEndPosition
zrythm::dsp::AtomicPositionQmlAdapter *	punchInPosition
zrythm::dsp::AtomicPositionQmlAdapter *	punchOutPosition

Friends
void	init_from (Transport &obj, const Transport &other, utils::ObjectCloneType clone_type)
void	to_json (nlohmann::json &j, const Transport &transport)
void	from_json (const nlohmann::json &j, Transport &transport)

Detailed Description

The Transport class represents the transport controls and state for an audio engine.

It manages playback, recording, and other transport-related functionality.

Definition at line 44 of file transport.h.

Member Enumeration Documentation

◆ Display

enum class zrythm::dsp::Transport::Display

strong

Corrseponts to "transport-display" in the gsettings.

Definition at line 73 of file transport.h.

◆ RecordingMode

enum class zrythm::dsp::Transport::RecordingMode

strong

Recording mode for MIDI and audio.

In all cases, only objects created during the current recording cycle can be changed. Previous objects shall not be touched.

Enumerator
OverwriteEvents	Overwrite events in first recorded region. In the case of MIDI, this will remove existing MIDI notes during recording. In the case of audio, this will act exactly the same as RECORDING_MODE_TAKES_MUTED.
MergeEvents	Merge events in existing region. In the case of MIDI, this will append MIDI notes. In the case of audio, this will act exactly the same as RECORDING_MODE_TAKES.
Takes	Events get put in new lanes each time recording starts/resumes (eg, when looping or entering/leaving the punch range).
TakesMuted	Same as RECORDING_MODE_TAKES, except previous takes (since recording started) are muted.

Definition at line 86 of file transport.h.

Member Function Documentation

◆ consume_metronome_countin_samples()

void zrythm::dsp::Transport::consume_metronome_countin_samples ( units::sample_t samples )

inline

For engine use only.

Parameters

samples Samples to consume.

Definition at line 449 of file transport.h.

◆ consume_recording_preroll_samples()

void zrythm::dsp::Transport::consume_recording_preroll_samples ( units::sample_t samples )

inline

For engine use only.

Parameters

samples Samples to consume.

Definition at line 460 of file transport.h.

◆ cuePosition()

dsp::AtomicPositionQmlAdapter * zrythm::dsp::Transport::cuePosition ( ) const

inline

Definition at line 260 of file transport.h.

◆ get_loop_range_positions()

std::pair< units::sample_t, units::sample_t > zrythm::dsp::Transport::get_loop_range_positions ( ) const

inlineoverridevirtualnoexcept

Returns the loop range positions in samples.

Implements zrythm::dsp::ITransport.

Definition at line 307 of file transport.h.

◆ get_play_state()

PlayState zrythm::dsp::Transport::get_play_state ( ) const

inlineoverridevirtualnoexcept

Implements zrythm::dsp::ITransport.

Definition at line 320 of file transport.h.

◆ get_playhead_position_in_audio_thread()

units::sample_t zrythm::dsp::Transport::get_playhead_position_in_audio_thread ( ) const

inlineoverridevirtualnoexcept

Get the playhead position.

Returns: The position in samples.

Implements zrythm::dsp::ITransport.

Definition at line 301 of file transport.h.

◆ get_punch_range_positions()

std::pair< units::sample_t, units::sample_t > zrythm::dsp::Transport::get_punch_range_positions ( ) const

inlineoverridevirtualnoexcept

Returns the punch recording range positions in samples.

Implements zrythm::dsp::ITransport.

Definition at line 314 of file transport.h.

◆ get_snapshot()

auto zrythm::dsp::Transport::get_snapshot ( ) const

inline

Definition at line 466 of file transport.h.

◆ goto_prev_or_next_marker()

void zrythm::dsp::Transport::goto_prev_or_next_marker	(	bool	prev,
		RangeOf< units::precise_tick_t > auto &&	extra_markers )

inline

Moves the playhead to the previous or next marker.

Parameters

prev	True for previous, false for next.

Definition at line 372 of file transport.h.

◆ isPaused()

Q_INVOKABLE bool zrythm::dsp::Transport::isPaused ( ) const

inline

Definition at line 341 of file transport.h.

◆ isRolling()

Q_INVOKABLE bool zrythm::dsp::Transport::isRolling ( ) const

inline

Definition at line 336 of file transport.h.

◆ loop_enabled()

bool zrythm::dsp::Transport::loop_enabled ( ) const

inlineoverridevirtualnoexcept

Implements zrythm::dsp::ITransport.

Definition at line 322 of file transport.h.

◆ loopEnabled()

bool zrythm::dsp::Transport::loopEnabled ( ) const

inline

Definition at line 240 of file transport.h.

◆ loopEndPosition()

dsp::AtomicPositionQmlAdapter * zrythm::dsp::Transport::loopEndPosition ( ) const

inline

Definition at line 268 of file transport.h.

◆ loopStartPosition()

dsp::AtomicPositionQmlAdapter * zrythm::dsp::Transport::loopStartPosition ( ) const

inline

Definition at line 264 of file transport.h.

◆ metronome_countin_frames_remaining()

units::sample_t zrythm::dsp::Transport::metronome_countin_frames_remaining ( ) const

inlineoverridevirtualnoexcept

Frames remaining for metronome countin.

Note: Count-in happens while the playhead is not moving.

Implements zrythm::dsp::ITransport.

Definition at line 329 of file transport.h.

◆ move_playhead()

void zrythm::dsp::Transport::move_playhead	(	units::precise_tick_t	target_ticks,
		bool	set_cue_point )

Moves playhead to given pos.

This is only for moves other than while playing and for looping while playing.

Should not be used during exporting.

Parameters

target_ticks	Position to set to.
set_cue_point	Also set the cue point at this position.

◆ playhead()

dsp::PlayheadQmlWrapper * zrythm::dsp::Transport::playhead ( ) const

inline

Definition at line 256 of file transport.h.

◆ playhead_ticks_before_pause()

auto zrythm::dsp::Transport::playhead_ticks_before_pause ( ) const

inline

Definition at line 439 of file transport.h.

◆ punch_enabled()

bool zrythm::dsp::Transport::punch_enabled ( ) const

inlineoverridevirtualnoexcept

Implements zrythm::dsp::ITransport.

Definition at line 323 of file transport.h.

◆ punchEnabled()

bool zrythm::dsp::Transport::punchEnabled ( ) const

inline

Definition at line 248 of file transport.h.

◆ punchInPosition()

dsp::AtomicPositionQmlAdapter * zrythm::dsp::Transport::punchInPosition ( ) const

inline

Definition at line 272 of file transport.h.

◆ punchOutPosition()

dsp::AtomicPositionQmlAdapter * zrythm::dsp::Transport::punchOutPosition ( ) const

inline

Definition at line 276 of file transport.h.

◆ recordEnabled()

bool zrythm::dsp::Transport::recordEnabled ( ) const

inline

Definition at line 244 of file transport.h.

◆ recording_enabled()

bool zrythm::dsp::Transport::recording_enabled ( ) const

inlineoverridevirtualnoexcept

Returns whether recording is enabled.

Implements zrythm::dsp::ITransport.

Definition at line 324 of file transport.h.

◆ recording_preroll_frames_remaining()

units::sample_t zrythm::dsp::Transport::recording_preroll_frames_remaining ( ) const

inlineoverridevirtualnoexcept

Frames remaining to preroll (playing back some time earlier before actually recording/rolling).

Preroll is a number of frames earlier to start at before the punch in position during recording.

Implements zrythm::dsp::ITransport.

Definition at line 325 of file transport.h.

◆ set_loop_range()

void zrythm::dsp::Transport::set_loop_range	(	bool	start,
		units::precise_tick_t	start_pos,
		units::precise_tick_t	pos,
		bool	snap )

Set the loop range.

Parameters

start True to set start pos, false to set end pos.

Property Documentation

◆ cuePosition

zrythm::dsp::AtomicPositionQmlAdapter * zrythm::dsp::Transport::cuePosition

read

Definition at line 53 of file transport.h.

◆ loopEnabled

QML_ELEMENT bool zrythm::dsp::Transport::loopEnabled

readwrite

Definition at line 48 of file transport.h.

◆ loopEndPosition

zrythm::dsp::AtomicPositionQmlAdapter * zrythm::dsp::Transport::loopEndPosition

read

Definition at line 55 of file transport.h.

◆ loopStartPosition

zrythm::dsp::AtomicPositionQmlAdapter * zrythm::dsp::Transport::loopStartPosition

read

Definition at line 54 of file transport.h.

◆ playhead

zrythm::dsp::PlayheadQmlWrapper * zrythm::dsp::Transport::playhead

read

Definition at line 52 of file transport.h.

◆ playState

PlayState zrythm::dsp::Transport::playState

readwrite

Definition at line 51 of file transport.h.

◆ punchEnabled

bool zrythm::dsp::Transport::punchEnabled

readwrite

Definition at line 50 of file transport.h.

◆ punchInPosition

zrythm::dsp::AtomicPositionQmlAdapter * zrythm::dsp::Transport::punchInPosition

read

Definition at line 57 of file transport.h.

◆ punchOutPosition

zrythm::dsp::AtomicPositionQmlAdapter * zrythm::dsp::Transport::punchOutPosition

read

Definition at line 59 of file transport.h.

◆ recordEnabled

bool zrythm::dsp::Transport::recordEnabled

readwrite

Definition at line 49 of file transport.h.

The documentation for this class was generated from the following file:

src/dsp/transport.h

Data Structures

Public Types

Public Member Functions

Properties

Friends

Detailed Description

Member Enumeration Documentation

◆ Display

◆ RecordingMode

Member Function Documentation

◆ consume_metronome_countin_samples()

◆ consume_recording_preroll_samples()

◆ cuePosition()

◆ get_loop_range_positions()

◆ get_play_state()

◆ get_playhead_position_in_audio_thread()

◆ get_punch_range_positions()

◆ get_snapshot()

◆ goto_prev_or_next_marker()

◆ isPaused()

◆ isRolling()

◆ loop_enabled()

◆ loopEnabled()

◆ loopEndPosition()

◆ loopStartPosition()

◆ metronome_countin_frames_remaining()

◆ move_playhead()

◆ playhead()

◆ playhead_ticks_before_pause()

◆ punch_enabled()

◆ punchEnabled()

◆ punchInPosition()

◆ punchOutPosition()

◆ recordEnabled()

◆ recording_enabled()

◆ recording_preroll_frames_remaining()

◆ set_loop_range()

Property Documentation

◆ cuePosition

◆ loopEnabled

◆ loopEndPosition

◆ loopStartPosition

◆ playhead

◆ playState

◆ punchEnabled

◆ punchInPosition

◆ punchOutPosition

◆ recordEnabled