PlaybackSchedule Struct Reference

#include <PlaybackSchedule.h>

Collaboration diagram for PlaybackSchedule:

Classes
class	TimeQueue
	A circular buffer. More...

Public Member Functions
PlaybackPolicy &	GetPolicy ()
const PlaybackPolicy &	GetPolicy () const
void	Init (double t0, double t1, const AudioIOStartStreamOptions &options, const RecordingSchedule *pRecordingSchedule)
double	ComputeWarpedLength (double t0, double t1) const
	Compute signed duration (in seconds at playback) of the specified region of the track. More...
double	SolveWarpedLength (double t0, double length) const
	Compute how much unwarped time must have elapsed if length seconds of warped time has elapsed, and add to t0. More...
bool	ReversedTime () const
	True if the end time is before the start time. More...
double	GetTrackTime () const
	Get current track time value, unadjusted. More...
void	SetTrackTime (double time)
	Set current track time value, unadjusted. More...
void	ResetMode ()
double	RealDuration (double trackTime1) const
double	RealDurationSigned (double trackTime1) const
double	RealTimeRemaining () const
void	RealTimeAdvance (double increment)
void	RealTimeInit (double trackTime)
void	RealTimeRestart ()

Public Attributes
double	mT0
	Playback starts at offset of mT0, which is measured in seconds. More...
double	mT1
	Playback ends at offset of mT1, which is measured in seconds. Note that mT1 may be less than mT0 during scrubbing. More...
std::atomic< double >	mTime
double	mWarpedTime
double	mWarpedLength
const BoundedEnvelope *	mEnvelope
class AUDIO_IO_API PlaybackSchedule::TimeQueue	mTimeQueue

Private Attributes
std::unique_ptr< PlaybackPolicy >	mpPlaybackPolicy
std::atomic< bool >	mPolicyValid { false }

Detailed Description

Definition at line 160 of file PlaybackSchedule.h.

Member Function Documentation

ComputeWarpedLength()

double PlaybackSchedule::ComputeWarpedLength	(	double	t0,
		double	t1
	)		const

Compute signed duration (in seconds at playback) of the specified region of the track.

Takes a region of the time track (specified by the unwarped time points in the project), and calculates how long it will actually take to play this region back, taking the time track's warping effects into account.

Parameters

t0	unwarped time to start calculation from
t1	unwarped time to stop calculation at

Returns

the warped duration in seconds, negated if t0 > t1

Definition at line 206 of file PlaybackSchedule.cpp.

{
   if (mEnvelope)
      return mEnvelope->IntegralOfInverse(t0, t1);
   else
      return t1 - t0;
}

References Envelope::IntegralOfInverse(), and mEnvelope.

Referenced by anonymous_namespace{ProjectAudioManager.cpp}::CutPreviewPlaybackPolicy::Initialize(), and RealDurationSigned().

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GetPolicy() [1/2]

PlaybackPolicy & PlaybackSchedule::GetPolicy

(

)

Definition at line 153 of file PlaybackSchedule.cpp.

{
   if (mPolicyValid.load(std::memory_order_acquire) && mpPlaybackPolicy)
      return *mpPlaybackPolicy;
 
   static OldDefaultPlaybackPolicy defaultPolicy;
   return defaultPolicy;
}

References mPolicyValid, and mpPlaybackPolicy.

Referenced by AudioIO::AllocateBuffers(), AudioIO::AudioThread(), AudioIoCallback::CallbackCheckCompletion(), AudioIoCallback::CallbackDoSeek(), AudioIoCallback::DrainInputBuffers(), anonymous_namespace{MIDIPlay.h}::MIDIPlay::FillOtherBuffers(), AudioIoCallback::FillOutputBuffers(), GetPolicy(), anonymous_namespace{MIDIPlay.h}::Iterator::OutputEvent(), AudioIO::ProcessPlaybackSlices(), PlaybackSchedule::TimeQueue::Producer(), AudioIO::StartStream(), AudioIO::StartStreamCleanup(), and AudioIO::StopStream().

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GetPolicy() [2/2]

const PlaybackPolicy & PlaybackSchedule::GetPolicy

(

)

const

Definition at line 162 of file PlaybackSchedule.cpp.

{
   return const_cast<PlaybackSchedule&>(*this).GetPolicy();
}

References GetPolicy().

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GetTrackTime()

double PlaybackSchedule::GetTrackTime ( ) const

inline

Get current track time value, unadjusted.

Returns a time in seconds.

Definition at line 292 of file PlaybackSchedule.h.

   { return mTime.load(std::memory_order_relaxed); }

Referenced by PlaybackPolicy::Done(), DefaultPlaybackPolicy::Done(), anonymous_namespace{ProjectAudioManager.cpp}::CutPreviewPlaybackPolicy::Done(), AudioIoCallback::DrainInputBuffers(), AudioIO::GetStreamTime(), AudioIO::IsCapturing(), PlaybackPolicy::OffsetTrackTime(), and AudioIO::StartStream().

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Init()

void PlaybackSchedule::Init	(	double	t0,
		double	t1,
		const AudioIOStartStreamOptions &	options,
		const RecordingSchedule *	pRecordingSchedule
	)

Definition at line 167 of file PlaybackSchedule.cpp.

{
   mpPlaybackPolicy.reset();
 
   if ( pRecordingSchedule )
      // It does not make sense to apply the time warp during overdub recording,
      // which defeats the purpose of making the recording synchronized with
      // the existing audio.  (Unless we figured out the inverse warp of the
      // captured samples in real time.)
      // So just quietly ignore the time track.
      mEnvelope = nullptr;
   else
      mEnvelope = options.envelope;
 
   mT0      = t0;
   if (pRecordingSchedule)
      mT0 -= pRecordingSchedule->mPreRoll;
 
   mT1      = t1;
   if (pRecordingSchedule)
      // adjust mT1 so that we don't give paComplete too soon to fill up the
      // desired length of recording
      mT1 -= pRecordingSchedule->mLatencyCorrection;
 
   // Main thread's initialization of mTime
   SetTrackTime( mT0 );
 
   if (options.policyFactory)
      mpPlaybackPolicy = options.policyFactory(options);
 
   mWarpedTime = 0.0;
   mWarpedLength = RealDuration(mT1);
 
   mPolicyValid.store(true, std::memory_order_release);
}

References AudioIOStartStreamOptions::envelope, mEnvelope, RecordingSchedule::mLatencyCorrection, mPolicyValid, mpPlaybackPolicy, RecordingSchedule::mPreRoll, mT0, mT1, mWarpedLength, mWarpedTime, AudioIOStartStreamOptions::policyFactory, RealDuration(), and SetTrackTime().

Referenced by AudioIO::StartStream().

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RealDuration()

double PlaybackSchedule::RealDuration

(

double

trackTime1

)

const

Definition at line 222 of file PlaybackSchedule.cpp.

{
   return fabs(RealDurationSigned(trackTime1));
}

References RealDurationSigned().

Referenced by Init(), DefaultPlaybackPolicy::RepositionPlayback(), and anonymous_namespace{MIDIPlay.h}::Iterator::UncorrectedMidiEventTime().

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RealDurationSigned()

double PlaybackSchedule::RealDurationSigned

(

double

trackTime1

)

const

Definition at line 227 of file PlaybackSchedule.cpp.

{
   return ComputeWarpedLength(mT0, trackTime1);
}

References ComputeWarpedLength(), and mT0.

Referenced by RealDuration(), and RealTimeInit().

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RealTimeAdvance()

void PlaybackSchedule::RealTimeAdvance

(

double

increment

)

Definition at line 237 of file PlaybackSchedule.cpp.

{
   mWarpedTime += increment;
}

References mWarpedTime.

Referenced by PlaybackPolicy::GetPlaybackSlice(), and DefaultPlaybackPolicy::GetPlaybackSlice().

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RealTimeInit()

void PlaybackSchedule::RealTimeInit

(

double

trackTime

)

Definition at line 242 of file PlaybackSchedule.cpp.

{
   mWarpedTime = RealDurationSigned( trackTime );
}

References mWarpedTime, and RealDurationSigned().

Referenced by PlaybackPolicy::OffsetTrackTime(), and DefaultPlaybackPolicy::RepositionPlayback().

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RealTimeRemaining()

double PlaybackSchedule::RealTimeRemaining

(

)

const

Definition at line 232 of file PlaybackSchedule.cpp.

{
   return mWarpedLength - mWarpedTime;
}

References mWarpedLength, and mWarpedTime.

Referenced by PlaybackPolicy::GetPlaybackSlice(), DefaultPlaybackPolicy::GetPlaybackSlice(), and DefaultPlaybackPolicy::RepositionPlayback().

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RealTimeRestart()

void PlaybackSchedule::RealTimeRestart

(

)

Definition at line 247 of file PlaybackSchedule.cpp.

{
   mWarpedTime = 0;
}

References mWarpedTime.

Referenced by DefaultPlaybackPolicy::RepositionPlayback().

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ResetMode()

void PlaybackSchedule::ResetMode ( )

inline

Definition at line 300 of file PlaybackSchedule.h.

                    {
      mPolicyValid.store(false, std::memory_order_release);
   }

Referenced by AudioIO::StartStream(), and AudioIO::StopStream().

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ReversedTime()

bool PlaybackSchedule::ReversedTime ( ) const

inline

True if the end time is before the start time.

Definition at line 283 of file PlaybackSchedule.h.

   {
      return mT1 < mT0;
   }

Referenced by PlaybackPolicy::AdvancedTrackTime(), DefaultPlaybackPolicy::AdvancedTrackTime(), PlaybackPolicy::Done(), and DefaultPlaybackPolicy::Done().

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SetTrackTime()

void PlaybackSchedule::SetTrackTime ( double  time )

inline

Set current track time value, unadjusted.

Definition at line 297 of file PlaybackSchedule.h.

   { mTime.store(time, std::memory_order_relaxed); }

Referenced by AudioIoCallback::CallbackDoSeek(), Init(), AudioIO::StartStream(), and AudioIoCallback::UpdateTimePosition().

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SolveWarpedLength()

double PlaybackSchedule::SolveWarpedLength	(	double	t0,
		double	length
	)		const

Compute how much unwarped time must have elapsed if length seconds of warped time has elapsed, and add to t0.

Parameters

t0	The unwarped time (seconds from project start) at which to start
length	How many seconds of real time went past; signed

Returns

The end point (in seconds from project start) as unwarped time

Definition at line 214 of file PlaybackSchedule.cpp.

{
   if (mEnvelope)
      return mEnvelope->SolveIntegralOfInverse(t0, length);
   else
      return t0 + length;
}

References mEnvelope, and Envelope::SolveIntegralOfInverse().

Referenced by PlaybackPolicy::AdvancedTrackTime(), DefaultPlaybackPolicy::AdvancedTrackTime(), and anonymous_namespace{ProjectAudioManager.cpp}::CutPreviewPlaybackPolicy::AdvancedTrackTime().

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Member Data Documentation

mEnvelope

const BoundedEnvelope* PlaybackSchedule::mEnvelope

Definition at line 189 of file PlaybackSchedule.h.

Referenced by PlaybackPolicy::AdvancedTrackTime(), DefaultPlaybackPolicy::AdvancedTrackTime(), ComputeWarpedLength(), Init(), PlaybackPolicy::MixerWarpOptions(), SolveWarpedLength(), and anonymous_namespace{MIDIPlay.h}::Iterator::UncorrectedMidiEventTime().

mPolicyValid

std::atomic<bool> PlaybackSchedule::mPolicyValid { false }

private

Definition at line 326 of file PlaybackSchedule.h.

Referenced by GetPolicy(), and Init().

mpPlaybackPolicy

std::unique_ptr<PlaybackPolicy> PlaybackSchedule::mpPlaybackPolicy

private

Definition at line 325 of file PlaybackSchedule.h.

Referenced by GetPolicy(), and Init().

mT0

double PlaybackSchedule::mT0

Playback starts at offset of mT0, which is measured in seconds.

Definition at line 162 of file PlaybackSchedule.h.

Referenced by DefaultPlaybackPolicy::AdvancedTrackTime(), AudioIO::AllocateBuffers(), anonymous_namespace{MIDIPlay.h}::MIDIPlay::ComputeOtherTimings(), anonymous_namespace{MIDIPlay.h}::MIDIPlay::FillOtherBuffers(), Init(), DefaultPlaybackPolicy::Initialize(), anonymous_namespace{ProjectAudioManager.cpp}::CutPreviewPlaybackPolicy::Initialize(), ScrubbingPlaybackPolicy::Initialize(), AudioIO::IsCapturing(), anonymous_namespace{MIDIPlay.h}::MIDIPlay::MidiLoopOffset(), RealDurationSigned(), DefaultPlaybackPolicy::RepositionPlayback(), anonymous_namespace{MIDIPlay.h}::MIDIPlay::StartPortMidiStream(), and anonymous_namespace{MIDIPlay.h}::Iterator::UncorrectedMidiEventTime().

mT1

double PlaybackSchedule::mT1

Playback ends at offset of mT1, which is measured in seconds. Note that mT1 may be less than mT0 during scrubbing.

Definition at line 164 of file PlaybackSchedule.h.

Referenced by PlaybackPolicy::AdvancedTrackTime(), DefaultPlaybackPolicy::AdvancedTrackTime(), PlaybackPolicy::Done(), DefaultPlaybackPolicy::Done(), anonymous_namespace{MIDIPlay.h}::Iterator::GetNextEvent(), Init(), anonymous_namespace{ProjectAudioManager.cpp}::CutPreviewPlaybackPolicy::Initialize(), anonymous_namespace{MIDIPlay.h}::MIDIPlay::MidiLoopOffset(), and DefaultPlaybackPolicy::RepositionPlayback().

mTime

std::atomic<double> PlaybackSchedule::mTime

Current track time position during playback, in seconds. Initialized by the main thread but updated by worker threads during playback or recording, and periodically reread by the main thread for purposes such as display update.

Definition at line 169 of file PlaybackSchedule.h.

mTimeQueue

class AUDIO_IO_API PlaybackSchedule::TimeQueue PlaybackSchedule::mTimeQueue

Referenced by AudioIO::AllocateBuffers(), AudioIoCallback::CallbackDoSeek(), AudioIO::ProcessPlaybackSlices(), DefaultPlaybackPolicy::RepositionPlayback(), DefaultPlaybackPolicy::RevertToOldDefault(), AudioIO::StartStream(), AudioIO::StartStreamCleanup(), AudioIO::StopStream(), and AudioIoCallback::UpdateTimePosition().

mWarpedLength

double PlaybackSchedule::mWarpedLength

Real length to be played (if looping, for each pass) after warping via a time track, computed just once when starting the stream. Length in real seconds between mT0 and mT1. Always positive.

Definition at line 179 of file PlaybackSchedule.h.

Referenced by Init(), RealTimeRemaining(), DefaultPlaybackPolicy::RepositionPlayback(), and anonymous_namespace{MIDIPlay.h}::Iterator::UncorrectedMidiEventTime().

mWarpedTime

double PlaybackSchedule::mWarpedTime

Accumulated real time (not track position), starting at zero (unlike mTime), and wrapping back to zero each time around looping play. Thus, it is the length in real seconds between mT0 and mTime.

Definition at line 174 of file PlaybackSchedule.h.

Referenced by DefaultPlaybackPolicy::GetPlaybackSlice(), Init(), RealTimeAdvance(), RealTimeInit(), RealTimeRemaining(), and RealTimeRestart().

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The documentation for this struct was generated from the following files:

• PlaybackSchedule.h
• PlaybackSchedule.cpp