ClipMirAudioReader Class Reference

#include <ClipMirAudioReader.h>

Inheritance diagram for ClipMirAudioReader:

Collaboration diagram for ClipMirAudioReader:

Public Member Functions
	ClipMirAudioReader (std::optional< LibFileFormats::AcidizerTags > tags, std::string filename, WaveTrack &singleClipWaveTrack)
double	GetSampleRate () const override
long long	GetNumSamples () const override
void	ReadFloats (float *buffer, long long where, size_t numFrames) const override
Public Member Functions inherited from MIR::MirAudioReader
virtual double	GetSampleRate () const =0
virtual long long	GetNumSamples () const =0
virtual void	ReadFloats (float *buffer, long long where, size_t numFrames) const =0
double	GetDuration () const
virtual	~MirAudioReader ()=default

Public Attributes
const std::optional< LibFileFormats::AcidizerTags >	tags
const std::string	filename
const WaveTrack::IntervalHolder	clip

Private Types
using	ChannelCache = std::array< std::optional< AudioSegmentSampleView >, 2 >

Private Member Functions
void	AddChannel (size_t iChannel, float *buffer, sampleCount start, size_t len) const

Private Attributes
const std::shared_ptr< const ClipInterface >	mClip
std::array< ChannelCache, 2 >	mCache
std::array< bool, 2 >	mUseFirst { true, true }

Detailed Description

Definition at line 23 of file ClipMirAudioReader.h.

Member Typedef Documentation

ChannelCache

using ClipMirAudioReader::ChannelCache = std::array<std::optional<AudioSegmentSampleView>, 2>

private

Definition at line 53 of file ClipMirAudioReader.h.

Constructor & Destructor Documentation

ClipMirAudioReader()

ClipMirAudioReader::ClipMirAudioReader	(	std::optional< LibFileFormats::AcidizerTags >	tags,
		std::string	filename,
		WaveTrack &	singleClipWaveTrack
	)

---

Audacity: A Digital Audio Editor

ClipMirAudioReader.h

Matthieu Hodgkinson

Definition at line 17 of file ClipMirAudioReader.cpp.

    : tags { std::move(tags) }
    , filename { std::move(filename) }
    , clip(*singleClipWaveTrack.Intervals().begin())
    , mClip(singleClipWaveTrack.GetClipInterfaces()[0])
{
}

Member Function Documentation

AddChannel()

void ClipMirAudioReader::AddChannel ( size_t  iChannel, float *  buffer, sampleCount  start, size_t  len  ) const

private

Definition at line 49 of file ClipMirAudioReader.cpp.

{
   constexpr auto mayThrow = false;
   const auto iCache = mUseFirst[iChannel] ? 0 : 1;
   auto& cache = mCache[iChannel][iCache];
   auto view = mClip->GetSampleView(iChannel, start, len, mayThrow);
   cache.emplace(std::move(view));
   cache->AddTo(buffer, len);
   mUseFirst[iChannel] = !mUseFirst[iChannel];
}

References anonymous_namespace{StretchingSequenceIntegrationTest.cpp}::iChannel, mCache, mClip, and mUseFirst.

Referenced by ReadFloats().

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GetNumSamples()

long long ClipMirAudioReader::GetNumSamples ( ) const

overridevirtual

Implements MIR::MirAudioReader.

Definition at line 32 of file ClipMirAudioReader.cpp.

{
   return mClip->GetVisibleSampleCount().as_long_long();
}

References mClip.

GetSampleRate()

double ClipMirAudioReader::GetSampleRate ( ) const

overridevirtual

Implements MIR::MirAudioReader.

Definition at line 27 of file ClipMirAudioReader.cpp.

{
   return mClip->GetRate();
}

References mClip.

ReadFloats()

void ClipMirAudioReader::ReadFloats ( float *  buffer, long long  where, size_t  numFrames  ) const

overridevirtual

Precondition

where >= 0

where + numFrames <= GetNumSamples()

Implements MIR::MirAudioReader.

Definition at line 37 of file ClipMirAudioReader.cpp.

{
   std::fill(buffer, buffer + numFrames, 0.f);
   AddChannel(0, buffer, where, numFrames);
   if (mClip->NChannels() == 1)
      return;
   AddChannel(1, buffer, where, numFrames);
   std::transform(
      buffer, buffer + numFrames, buffer, [](float f) { return f / 2; });
}

References AddChannel(), and mClip.

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Member Data Documentation

clip

const WaveTrack::IntervalHolder ClipMirAudioReader::clip

Definition at line 32 of file ClipMirAudioReader.h.

filename

const std::string ClipMirAudioReader::filename

Definition at line 31 of file ClipMirAudioReader.h.

mCache

std::array<ChannelCache, 2> ClipMirAudioReader::mCache

mutableprivate

Definition at line 54 of file ClipMirAudioReader.h.

Referenced by AddChannel().

mClip

const std::shared_ptr<const ClipInterface> ClipMirAudioReader::mClip

private

Definition at line 48 of file ClipMirAudioReader.h.

Referenced by AddChannel(), GetNumSamples(), GetSampleRate(), and ReadFloats().

mUseFirst

std::array<bool, 2> ClipMirAudioReader::mUseFirst { true, true }

mutableprivate

Definition at line 55 of file ClipMirAudioReader.h.

Referenced by AddChannel().

tags

const std::optional<LibFileFormats::AcidizerTags> ClipMirAudioReader::tags

Definition at line 30 of file ClipMirAudioReader.h.

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

• ClipMirAudioReader.h
• ClipMirAudioReader.cpp