WaveChannel Class Reference

#include <WaveTrack.h>

Inheritance diagram for WaveChannel:

Collaboration diagram for WaveChannel:

Public Member Functions
	WaveChannel (WaveTrack &owner)
	~WaveChannel () override
WaveTrack &	GetTrack ()
const WaveTrack &	GetTrack () const
AudioGraph::ChannelType	GetChannelType () const override
	Classify this channel. More...
size_t	NChannels () const override
	A constant property. More...
float	GetChannelGain (int channel) const override
	Takes gain and pan into account. More...
bool	DoGet (size_t iChannel, size_t nBuffers, const samplePtr buffers[], sampleFormat format, sampleCount start, size_t len, bool backwards, fillFormat fill=FillFormat::fillZero, bool mayThrow=true, sampleCount *pNumWithinClips=nullptr) const override
	This fails if any clip overlapping the range has non-unit stretch ratio! More...
double	GetStartTime () const override
double	GetEndTime () const override
double	GetRate () const override
bool	HasTrivialEnvelope () const override
void	GetEnvelopeValues (double *buffer, size_t bufferLen, double t0, bool backwards) const override
sampleFormat	WidestEffectiveFormat () const override
ChannelGroup &	DoGetChannelGroup () const override
	Subclass must override. More...
std::shared_ptr< WaveClipChannel >	GetInterval (size_t iInterval)
std::shared_ptr< const WaveClipChannel >	GetInterval (size_t iInterval) const
IteratorRange< IntervalIterator< WaveClipChannel > >	Intervals ()
IteratorRange< IntervalIterator< const WaveClipChannel > >	Intervals () const
bool	GetFloats (float *buffer, sampleCount start, size_t len, fillFormat fill=FillFormat::fillZero, bool mayThrow=true, sampleCount *pNumWithinClips=nullptr) const
	"narrow" overload fetches from the unique channel More...
ChannelSampleView	GetSampleView (double t0, double t1, bool mayThrow) const
	Request channel samples within [t0, t1), not knowing in advance how many this will be. More...
bool	Set (constSamplePtr buffer, sampleFormat format, sampleCount start, size_t len, sampleFormat effectiveFormat=widestSampleFormat)
	Random-access assignment of a range of samples. More...
bool	SetFloats (const float *buffer, sampleCount start, size_t len, sampleFormat effectiveFormat=widestSampleFormat)
	Random-access assignment of a range of samples. More...
bool	AppendBuffer (constSamplePtr buffer, sampleFormat format, size_t len, unsigned stride, sampleFormat effectiveFormat)
bool	Append (constSamplePtr buffer, sampleFormat format, size_t len)
size_t	GetBestBlockSize (sampleCount t) const
	A hint for sizing of well aligned fetches. More...
size_t	GetIdealBlockSize ()
	A hint for sizing of well aligned fetches. More...
size_t	GetMaxBlockSize () const
sampleFormat	GetSampleFormat () const
bool	GetFloats (size_t iChannel, size_t nBuffers, float *const buffers[], sampleCount start, size_t len, bool backwards=false, fillFormat fill=FillFormat::fillZero, bool mayThrow=true, sampleCount *pNumWithinClips=nullptr) const
Public Member Functions inherited from Channel
virtual	~Channel ()
ChannelGroup &	GetChannelGroup ()
	Channel object's lifetime is assumed to be nested in its Track's. More...
const ChannelGroup &	GetChannelGroup () const
	Channel object's lifetime is assumed to be nested in its Track's. More...
size_t	GetChannelIndex () const
size_t	NIntervals () const
	Report the number of intervals. More...
template<typename IntervalType = Interval>
std::shared_ptr< IntervalType >	GetInterval (size_t iInterval)
	Retrieve an interval, cast to the given type. More...
template<typename IntervalType = const Interval>
auto	GetInterval (size_t iInterval) const -> std::enable_if_t< std::is_const_v< IntervalType >, std::shared_ptr< IntervalType > >
template<typename IntervalType = Interval>
IteratorRange< IntervalIterator< IntervalType > >	Intervals ()
	Get range of intervals with mutative access. More...
template<typename IntervalType = const Interval>
auto	Intervals () const -> std::enable_if_t< std::is_const_v< IntervalType >, IteratorRange< IntervalIterator< IntervalType > > >
	Get range of intervals with read-only access. More...
Public Member Functions inherited from WideSampleSequence
virtual	~WideSampleSequence ()
virtual size_t	NChannels () const =0
	A constant property. More...
virtual float	GetChannelGain (int channel) const =0
bool	GetFloats (size_t iChannel, size_t nBuffers, float *const buffers[], sampleCount start, size_t len, bool backwards=false, fillFormat fill=FillFormat::fillZero, bool mayThrow=true, sampleCount *pNumWithinClips=nullptr) const
virtual bool	DoGet (size_t iChannel, size_t nBuffers, const samplePtr buffers[], sampleFormat format, sampleCount start, size_t len, bool backward, fillFormat fill=FillFormat::fillZero, bool mayThrow=true, sampleCount *pNumWithinClips=nullptr) const =0
virtual double	GetStartTime () const =0
virtual double	GetEndTime () const =0
virtual double	GetRate () const =0
sampleCount	TimeToLongSamples (double t0) const
double	LongSamplesToTime (sampleCount pos) const
double	SnapToSample (double t) const
virtual sampleFormat	WidestEffectiveFormat () const =0
virtual bool	HasTrivialEnvelope () const =0
virtual void	GetEnvelopeValues (double *buffer, size_t bufferLen, double t0, bool backwards) const =0
Public Member Functions inherited from AudioGraph::Channel
virtual	~Channel ()
virtual ChannelType	GetChannelType () const =0
	Classify this channel. More...

Private Attributes
WaveTrack &	mOwner

Additional Inherited Members
Public Types inherited from Channel
using	Interval = ChannelInterval
virtual ChannelGroup &	DoGetChannelGroup () const =0
	Subclass must override. More...

Detailed Description

Definition at line 81 of file WaveTrack.h.

Constructor & Destructor Documentation

WaveChannel()

WaveChannel::WaveChannel ( WaveTrack &  owner )

explicit

Definition at line 368 of file WaveTrack.cpp.

   : mOwner{ owner }
{
}

~WaveChannel()

WaveChannel::~WaveChannel ( )

overridedefault

Member Function Documentation

Append()

bool WaveChannel::Append	(	constSamplePtr	buffer,
		sampleFormat	format,
		size_t	len
	)

If there is an existing WaveClip in the WaveTrack that owns the channel, then the data are appended to that clip. If there are no WaveClips in the track, then a new one is created.

Returns

true if at least one complete block was created

Exception safety guarantee:

Partial – Some prefix (maybe none) of the buffer is appended, and no content already flushed to disk is lost.

Definition at line 2216 of file WaveTrack.cpp.

{
   const size_t iChannel = GetChannelIndex();
   return GetTrack()
      .Append(iChannel, buffer, format, len, 1, widestSampleFormat);
}

References WaveTrack::Append(), anonymous_namespace{ExportPCM.cpp}::format, Channel::GetChannelIndex(), GetTrack(), anonymous_namespace{StretchingSequenceIntegrationTest.cpp}::iChannel, and widestSampleFormat.

Referenced by EffectEqualization::Task::AccumulateSamples(), WaveTrackSink::DoConsume(), TrackSpectrumTransformer::DoOutput(), EffectSBSMS::Process(), EffectPaulstretch::ProcessOne(), EffectChangeSpeed::ProcessOne(), and EffectTwoPassSimpleMono::ProcessOne().

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AppendBuffer()

bool WaveChannel::AppendBuffer	(	constSamplePtr	buffer,
		sampleFormat	format,
		size_t	len,
		unsigned	stride,
		sampleFormat	effectiveFormat
	)

Exception safety guarantee:

Partial – Some prefix (maybe none) of the buffer is appended, and no content already flushed to disk is lost.

Definition at line 2205 of file WaveTrack.cpp.

{
   const size_t iChannel = GetChannelIndex();
   return GetTrack()
      .Append(iChannel, buffer, format, len, stride, effectiveFormat);
}

References WaveTrack::Append(), anonymous_namespace{ExportPCM.cpp}::format, Channel::GetChannelIndex(), GetTrack(), and anonymous_namespace{StretchingSequenceIntegrationTest.cpp}::iChannel.

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DoGet()

bool WaveChannel::DoGet ( size_t  iChannel, size_t  nBuffers, const samplePtr  buffers[], sampleFormat  format, sampleCount  start, size_t  len, bool  backwards, fillFormat  fill = FillFormat::fillZero, bool  mayThrow = true, sampleCount *  pNumWithinClips = nullptr  ) const

overridevirtual

This fails if any clip overlapping the range has non-unit stretch ratio!

Implements WideSampleSequence.

Definition at line 2591 of file WaveTrack.cpp.

{
   // These two assertions still remain after the great wide wave track and clip
   // refactoring!
   assert(iChannel == 0);
   assert(nBuffers <= 1);
   return GetTrack().DoGet(GetChannelIndex(), std::min<size_t>(nBuffers, 1),
      buffers, format, start, len, backwards, fill, mayThrow, pNumWithinClips);
}

References WaveTrack::DoGet(), anonymous_namespace{ExportPCM.cpp}::format, Channel::GetChannelIndex(), GetTrack(), and anonymous_namespace{StretchingSequenceIntegrationTest.cpp}::iChannel.

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DoGetChannelGroup()

ChannelGroup & WaveChannel::DoGetChannelGroup ( ) const

overridevirtual

Subclass must override.

Postcondition

result: for some ii less than result.NChannels(), this == result.GetChannel(ii).get()

Implements Channel.

Definition at line 731 of file WaveTrack.cpp.

{
   return mOwner;
}

References mOwner.

Referenced by GetTrack().

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GetBestBlockSize()

size_t WaveChannel::GetBestBlockSize ( sampleCount  t ) const

inline

A hint for sizing of well aligned fetches.

Definition at line 850 of file WaveTrack.h.

                                                        {
   return GetTrack().GetBestBlockSize(t);
}

References WaveTrack::GetBestBlockSize(), and GetTrack().

Referenced by EffectNormalize::AnalyseTrackData(), TrackSpectrumTransformer::Process(), EffectChangeSpeed::ProcessOne(), EffectTwoPassSimpleMono::ProcessOne(), EffectNormalize::ProcessOne(), EffectLoudness::ProcessOne(), resampleCB(), VoiceKey::TestDirectionChanges(), VoiceKey::TestEnergy(), and VoiceKey::TestSignChanges().

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GetChannelGain()

float WaveChannel::GetChannelGain ( int  channel ) const

overridevirtual

Takes gain and pan into account.

Implements WideSampleSequence.

Definition at line 860 of file WaveTrack.cpp.

{
   return GetTrack().GetChannelGain(channel);
}

References WaveTrack::GetChannelGain(), and GetTrack().

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GetChannelType()

AudioGraph::ChannelType WaveChannel::GetChannelType ( ) const

overridevirtual

Classify this channel.

Implements AudioGraph::Channel.

Definition at line 537 of file WaveTrack.cpp.

{
   if (GetTrack().Channels().size() == 1)
      return AudioGraph::MonoChannel;
   else if (GetChannelIndex() == 0)
      return AudioGraph::LeftChannel;
   else
      // TODO: more-than-two-channels
      return AudioGraph::RightChannel;
}

References Channel::GetChannelIndex(), GetTrack(), AudioGraph::LeftChannel, AudioGraph::MonoChannel, AudioGraph::RightChannel, and size.

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GetEndTime()

double WaveChannel::GetEndTime ( ) const

overridevirtual

Implements WideSampleSequence.

Definition at line 2581 of file WaveTrack.cpp.

{
   return GetTrack().GetEndTime();
}

References WaveTrack::GetEndTime(), and GetTrack().

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GetEnvelopeValues()

void WaveChannel::GetEnvelopeValues ( double *  buffer, size_t  bufferLen, double  t0, bool  backwards  ) const

overridevirtual

Fetch envelope values corresponding to uniformly separated sample times starting at the given time

Parameters

backwards

if true, fetch values in reverse order, from t0 to t0 - bufferLen / rate

Implements WideSampleSequence.

Definition at line 2841 of file WaveTrack.cpp.

{
   return GetTrack().GetEnvelopeValues(buffer, bufferLen, t0, backwards);
}

References WaveTrack::GetEnvelopeValues(), and GetTrack().

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GetFloats() [1/2]

bool WaveChannel::GetFloats ( float *  buffer, sampleCount  start, size_t  len, fillFormat  fill = FillFormat::fillZero, bool  mayThrow = true, sampleCount *  pNumWithinClips = nullptr  ) const

inline

"narrow" overload fetches from the unique channel

Definition at line 129 of file WaveTrack.h.

   {
      constexpr auto backwards = false;
      return GetFloats(
         0, 1, &buffer, start, len, backwards, fill, mayThrow, pNumWithinClips);
   }

References WideSampleSequence::GetFloats().

Referenced by EffectNormalize::AnalyseTrackData(), EffectAutoDuck::ApplyDuckFade(), VoiceKey::OffBackward(), VoiceKey::OffForward(), VoiceKey::OnBackward(), VoiceKey::OnForward(), TrackSpectrumTransformer::Process(), EffectPaulstretch::ProcessOne(), EffectChangeSpeed::ProcessOne(), EffectClickRemoval::ProcessOne(), EffectRepair::ProcessOne(), EffectFindClipping::ProcessOne(), EffectEqualization::ProcessOne(), EffectTwoPassSimpleMono::ProcessOne(), EffectNormalize::ProcessOne(), resampleCB(), SelectHandle::StartSnappingFreqSelection(), VoiceKey::TestDirectionChanges(), VoiceKey::TestEnergy(), and VoiceKey::TestSignChanges().

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GetFloats() [2/2]

bool WideSampleSequence::GetFloats	(	size_t	iChannel,
		size_t	nBuffers,
		float *const	buffers[],
		sampleCount	start,
		size_t	len,
		bool	backwards = false,
		fillFormat	fill = FillFormat::fillZero,
		bool	mayThrow = true,
		sampleCount *	pNumWithinClips = nullptr
	)		const

Retrieve samples from a sequence in floating-point format, regardless of the storage format

Parameters

	iChannel	index of first channel to fetch
	nBuffers	counts buffers
	buffers	receive the samples
	start	starting sample, relative to absolute time zero
	len	how many samples to get. buffers are assumed sufficiently large
	fill	how to assign values for sample positions between clips
	mayThrow	if false, fill buffer with zeros when there is failure to retrieve samples; else throw
[out]	pNumWithinClips	Report how many samples were copied from within clips, rather than filled according to fillFormat; but these were not necessarily one contiguous range.

Precondition

iChannel + nBuffers <= NChannels()

Returns

false when mayThrow is false and not all samples could be retrieved

Postcondition

if return value is false, buffers are zero-filled

Definition at line 58 of file WideSampleSequence.cpp.

{
   // Cast the pointers to pass them to DoGet() which handles multiple
   // destination formats
   const auto castBuffers = reinterpret_cast<const samplePtr*>(buffers);
   const auto result = DoGet(
      iChannel, nBuffers, castBuffers,
      floatSample, start, len, backwards, fill, mayThrow, pNumWithinClips);
   if (!result)
      while (nBuffers--)
         ClearSamples(castBuffers[nBuffers], floatSample, 0, len);
   return result;
}

GetIdealBlockSize()

size_t WaveChannel::GetIdealBlockSize ( )

inline

A hint for sizing of well aligned fetches.

Definition at line 854 of file WaveTrack.h.

                                      {
   return GetTrack().GetIdealBlockSize();
}

References WaveTrack::GetIdealBlockSize(), and GetTrack().

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GetInterval() [1/2]

std::shared_ptr< WaveClipChannel > WaveChannel::GetInterval

(

size_t

iInterval

)

Definition at line 737 of file WaveTrack.cpp.

                                         { return
   ::Channel::GetInterval<WaveClipChannel>(iInterval); }

GetInterval() [2/2]

std::shared_ptr< const WaveClipChannel > WaveChannel::GetInterval

(

size_t

iInterval

)

const

Definition at line 741 of file WaveTrack.cpp.

                                               { return
   ::Channel::GetInterval<const WaveClipChannel>(iInterval); }

GetMaxBlockSize()

size_t WaveChannel::GetMaxBlockSize ( ) const

inline

A hint for maximum returned by either of GetBestBlockSize, GetIdealBlockSize

Definition at line 858 of file WaveTrack.h.

                                          {
   return GetTrack().GetMaxBlockSize();
}

References WaveTrack::GetMaxBlockSize(), and GetTrack().

Referenced by EffectNormalize::AnalyseTrackData(), TrackSpectrumTransformer::Process(), EffectChangeSpeed::ProcessOne(), EffectClickRemoval::ProcessOne(), EffectTwoPassSimpleMono::ProcessOne(), EffectNormalize::ProcessOne(), VoiceKey::TestDirectionChanges(), VoiceKey::TestEnergy(), and VoiceKey::TestSignChanges().

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GetRate()

double WaveChannel::GetRate ( ) const

overridevirtual

Implements WideSampleSequence.

Definition at line 793 of file WaveTrack.cpp.

{
   return GetTrack().GetRate();
}

References WaveTrack::GetRate(), and GetTrack().

Referenced by SelectHandle::AdjustFreqSelection(), VoiceKey::CalibrateNoise(), SpectrumVRulerControls::DoHandleWheelRotation(), SpectrumVZoomHandle::DoZoom(), WaveformVZoomHandle::DoZoom(), VoiceKey::OffBackward(), VoiceKey::OffForward(), VoiceKey::OnBackward(), VoiceKey::OnForward(), anonymous_namespace{BrushHandle.cpp}::PositionToFrequency(), anonymous_namespace{SelectHandle.cpp}::PositionToFrequency(), SelectHandle::SnapCenterOnce(), and SelectHandle::StartSnappingFreqSelection().

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GetSampleFormat()

sampleFormat WaveChannel::GetSampleFormat ( ) const

inline

Definition at line 862 of file WaveTrack.h.

                                                {
   return GetTrack().GetSampleFormat();
}

References WaveTrack::GetSampleFormat(), and GetTrack().

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GetSampleView()

ChannelSampleView WaveChannel::GetSampleView	(	double	t0,
		double	t1,
		bool	mayThrow
	)		const

Request channel samples within [t0, t1), not knowing in advance how many this will be.

The stretching of intersecting intervals influences the number of samples fitting into [t0, t1), i.e., half as many for twice as large a stretch ratio, due to a larger spacing of the raw samples.

Precondition

samples in [t0, t1) can be counted with size_t

Definition at line 2725 of file WaveTrack.cpp.

{
   std::vector<std::shared_ptr<const WaveClipChannel>>
      intersectingIntervals;
   for (const auto &interval : Intervals())
      if (interval->Intersects(t0, t1))
         intersectingIntervals.push_back(interval);
   if (intersectingIntervals.empty())
      return { AudioSegmentSampleView {
         (TimeToLongSamples(t1) - TimeToLongSamples(t0)).as_size_t() } };
   std::sort(
      intersectingIntervals.begin(), intersectingIntervals.end(),
      [](const auto& a, const auto& b) { return a->Start() < b->Start(); });
   std::vector<AudioSegmentSampleView> segments;
   segments.reserve(2 * intersectingIntervals.size() + 1);
   for (auto i = 0u; i < intersectingIntervals.size();++i)
   {
      const auto& interval = intersectingIntervals[i];
      const auto intervalStartTime = interval->Start();
      if (t0 < intervalStartTime)
      {
         const auto numSamples = TimeToLongSamples(intervalStartTime - t0);
         segments.push_back(AudioSegmentSampleView{numSamples.as_size_t()});
         t0 = intervalStartTime;
      }
      const auto intervalT0 = t0 - intervalStartTime;
      const auto intervalT1 = std::min(t1, interval->End()) - intervalStartTime;
      if(intervalT1 > intervalT0)
      {
         auto newSegment =
            interval->GetSampleView(intervalT0, intervalT1, mayThrow);
         t0 += intervalT1 - intervalT0;
         segments.push_back(std::move(newSegment));
      }
      if (t0 == t1)
         break;
   }
   if (t0 < t1)
      segments.push_back(AudioSegmentSampleView {
         (TimeToLongSamples(t1) - TimeToLongSamples(t0)).as_size_t() });
   return segments;
}

References Intervals(), min(), and WideSampleSequence::TimeToLongSamples().

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GetStartTime()

double WaveChannel::GetStartTime ( ) const

overridevirtual

Implements WideSampleSequence.

Definition at line 2571 of file WaveTrack.cpp.

{
   return GetTrack().GetStartTime();
}

References WaveTrack::GetStartTime(), and GetTrack().

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GetTrack() [1/2]

WaveTrack & WaveChannel::GetTrack ( )

inline

Definition at line 840 of file WaveTrack.h.

                                 {
   auto &result = static_cast<WaveTrack&>(DoGetChannelGroup());
   return result;
}

References DoGetChannelGroup().

Referenced by Append(), AppendBuffer(), DoGet(), WaveformView::Draw(), WaveChannelSubView::DrawBoldBoundaries(), anonymous_namespace{SpectrumView.cpp}::DrawClipSpectrum(), anonymous_namespace{WaveformView.cpp}::DrawClipWaveform(), SpectrogramSettings::Get(), WaveformSettings::Get(), WaveformScale::Get(), SpectrogramBounds::Get(), WaveformAppearance::Get(), GetBestBlockSize(), SpectrogramBounds::GetBounds(), GetChannelGain(), GetChannelType(), GetEndTime(), WaveChannelUtilities::GetEnvelopeAtTime(), GetEnvelopeValues(), GetIdealBlockSize(), GetMaxBlockSize(), GetRate(), GetSampleFormat(), GetStartTime(), HasTrivialEnvelope(), EffectLoudness::LoadBufferBlock(), SpectrogramSettings::Own(), EffectPaulstretch::ProcessOne(), SpectralDataManager::Worker::ProcessOvertones(), SpectralDataManager::Worker::ProcessSnapping(), SpectrogramSettings::Reset(), WaveformSettings::Set(), EffectLoudness::StoreBufferBlock(), WidestEffectiveFormat(), and WaveTrack::WriteOneXML().

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GetTrack() [2/2]

const WaveTrack & WaveChannel::GetTrack ( ) const

inline

Definition at line 845 of file WaveTrack.h.

                                             {
   auto &result = static_cast<const WaveTrack&>(DoGetChannelGroup());
   return result;
}

References DoGetChannelGroup().

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HasTrivialEnvelope()

bool WaveChannel::HasTrivialEnvelope ( ) const

overridevirtual

Returns

whether envelope values are all unit

Implements WideSampleSequence.

Definition at line 2826 of file WaveTrack.cpp.

{
   return GetTrack().HasTrivialEnvelope();
}

References GetTrack(), and WaveTrack::HasTrivialEnvelope().

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Intervals() [1/2]

IteratorRange< Channel::IntervalIterator< WaveClipChannel > > WaveChannel::Intervals

(

)

Definition at line 745 of file WaveTrack.cpp.

{ return ::Channel::Intervals<WaveClipChannel>(); }

Referenced by SpectrumView::DoDraw(), WaveformView::DoDraw(), WaveChannelUtilities::GetIntervalAtTime(), WaveChannelUtilities::GetMinMax(), WaveChannelUtilities::GetRMS(), GetSampleView(), Set(), WaveChannelUtilities::SortedClipArray(), and WaveTrack::WriteOneXML().

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Intervals() [2/2]

IteratorRange< Channel::IntervalIterator< const WaveClipChannel > > WaveChannel::Intervals

(

)

const

Definition at line 748 of file WaveTrack.cpp.

                             {
   return ::Channel::Intervals<const WaveClipChannel>(); }

NChannels()

size_t WaveChannel::NChannels ( ) const

overridevirtual

A constant property.

Postcondition

result: result > 0

Implements WideSampleSequence.

Definition at line 527 of file WaveTrack.cpp.

{
   return 1;
}

Set()

bool WaveChannel::Set	(	constSamplePtr	buffer,
		sampleFormat	format,
		sampleCount	start,
		size_t	len,
		sampleFormat	effectiveFormat = widestSampleFormat
	)

Random-access assignment of a range of samples.

Exception safety guarantee:

Weak

Parameters

effectiveFormat

Make the effective format of the data at least the minumum of this value and `format`. (Maybe wider, if merging with preexistent data.) If the data are later narrowed from stored format, but not narrower than the effective, then no dithering will occur.

Definition at line 2769 of file WaveTrack.cpp.

{
   for (const auto &clip: Intervals())
   {
      auto clipStart = clip->GetPlayStartSample();
      auto clipEnd = clip->GetPlayEndSample();
 
      if (clipEnd > start && clipStart < start+len)
      {
         // Test as also in WaveTrack::GetOne()
         if (clip->HasPitchOrSpeed())
            return false;
 
         // Clip sample region and Get/Put sample region overlap
         auto samplesToCopy =
            std::min( start+len - clipStart, clip->GetVisibleSampleCount() );
         auto startDelta = clipStart - start;
         decltype(startDelta) inclipDelta = 0;
         if (startDelta < 0)
         {
            inclipDelta = -startDelta; // make positive value
            samplesToCopy -= inclipDelta;
            // samplesToCopy is now either len or
            //    (clipEnd - clipStart) - (start - clipStart)
            //    == clipEnd - start > 0
            // samplesToCopy is not more than len
            //
            startDelta = 0;
            // startDelta is zero
         }
         else {
            // startDelta is nonnegative and less than len
            // samplesToCopy is positive and not more than len
         }
 
         clip->SetSamples(
            buffer + startDelta.as_size_t() * SAMPLE_SIZE(format),
            format, inclipDelta, samplesToCopy.as_size_t(), effectiveFormat );
      }
   }
   return true;
}

References anonymous_namespace{ExportPCM.cpp}::format, Intervals(), min(), and SAMPLE_SIZE.

Referenced by WaveTrackSink::DoConsume().

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SetFloats()

bool WaveChannel::SetFloats ( const float *  buffer, sampleCount  start, size_t  len, sampleFormat  effectiveFormat = widestSampleFormat  )

inline

Random-access assignment of a range of samples.

Parameters

effectiveFormat

Make the effective format of the data at least the minumum of this value and `format`. (Maybe wider, if merging with preexistent data.) If the data are later narrowed from stored format, but not narrower than the effective, then no dithering will occur.

Definition at line 162 of file WaveTrack.h.

   {
      return Set(reinterpret_cast<constSamplePtr>(buffer), floatSample,
         start, len, effectiveFormat);
   }

References floatSample.

Referenced by EffectAutoDuck::ApplyDuckFade(), EffectClickRemoval::ProcessOne(), EffectRepair::ProcessOne(), EffectTwoPassSimpleMono::ProcessOne(), and EffectNormalize::ProcessOne().

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WidestEffectiveFormat()

sampleFormat WaveChannel::WidestEffectiveFormat ( ) const

overridevirtual

Returns

widest effective SampleFormat in any part of the track

Implements WideSampleSequence.

Definition at line 2813 of file WaveTrack.cpp.

{
   return GetTrack().WidestEffectiveFormat();
}

References GetTrack(), and WaveTrack::WidestEffectiveFormat().

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Member Data Documentation

mOwner

WaveTrack& WaveChannel::mOwner

private

Definition at line 197 of file WaveTrack.h.

Referenced by DoGetChannelGroup().

---

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

• WaveTrack.h
• WaveTrack.cpp