AudioSegmentFactory Class Reference

#include <AudioSegmentFactory.h>

Inheritance diagram for AudioSegmentFactory:

Collaboration diagram for AudioSegmentFactory:

Public Member Functions
	AudioSegmentFactory (int sampleRate, int numChannels, ClipConstHolders clips)
std::vector< std::shared_ptr< AudioSegment > >	CreateAudioSegmentSequence (double playbackStartTime, PlaybackDirection) override
Public Member Functions inherited from AudioSegmentFactoryInterface
virtual	~AudioSegmentFactoryInterface ()
virtual std::vector< std::shared_ptr< AudioSegment > >	CreateAudioSegmentSequence (double playbackStartTime, PlaybackDirection)=0

Private Member Functions
std::vector< std::shared_ptr< AudioSegment > >	CreateAudioSegmentSequenceForward (double playbackStartTime)
std::vector< std::shared_ptr< AudioSegment > >	CreateAudioSegmentSequenceBackward (double playbackStartTime)

Private Attributes
const ClipConstHolders	mClips
const int	mSampleRate
const int	mNumChannels

Detailed Description

Definition at line 23 of file AudioSegmentFactory.h.

Constructor & Destructor Documentation

AudioSegmentFactory()

AudioSegmentFactory::AudioSegmentFactory	(	int	sampleRate,
		int	numChannels,
		ClipConstHolders	clips
	)

Definition at line 22 of file AudioSegmentFactory.cpp.

    : mClips { std::move(clips) }
    , mSampleRate { sampleRate }
    , mNumChannels { numChannels }
{
}

Member Function Documentation

CreateAudioSegmentSequence()

std::vector< std::shared_ptr< AudioSegment > > AudioSegmentFactory::CreateAudioSegmentSequence ( double  playbackStartTime, PlaybackDirection  direction  )

overridevirtual

Implements AudioSegmentFactoryInterface.

Definition at line 31 of file AudioSegmentFactory.cpp.

{
   return direction == PlaybackDirection::forward ?
             CreateAudioSegmentSequenceForward(playbackStartTime) :
             CreateAudioSegmentSequenceBackward(playbackStartTime);
}

References CreateAudioSegmentSequenceBackward(), CreateAudioSegmentSequenceForward(), and forward.

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CreateAudioSegmentSequenceBackward()

std::vector< std::shared_ptr< AudioSegment > > AudioSegmentFactory::CreateAudioSegmentSequenceBackward ( double  playbackStartTime )

private

Definition at line 70 of file AudioSegmentFactory.cpp.

{
   auto sortedClips = mClips;
   std::sort(
      sortedClips.begin(), sortedClips.end(),
      [&](
         const std::shared_ptr<const ClipInterface>& a,
         const std::shared_ptr<const ClipInterface>& b) {
         return a->GetPlayEndTime() > b->GetPlayEndTime();
      });
   std::vector<std::shared_ptr<AudioSegment>> segments;
   for (const auto& clip : sortedClips)
   {
      if (clip->GetPlayEndTime() < t0)
      {
         const auto numSamples =
            sampleCount { (t0 - clip->GetPlayEndTime()) * mSampleRate + .5 };
         segments.push_back(
            std::make_shared<SilenceSegment>(mNumChannels, numSamples));
         t0 = clip->GetPlayEndTime();
      }
      else if (clip->GetPlayStartTime() >= t0)
         continue;
      segments.push_back(std::make_shared<ClipSegment>(
         *clip, clip->GetPlayEndTime() - t0, PlaybackDirection::backward));
      t0 = clip->GetPlayStartTime();
   }
   return segments;
}

References backward, mClips, mNumChannels, and mSampleRate.

Referenced by CreateAudioSegmentSequence().

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CreateAudioSegmentSequenceForward()

std::vector< std::shared_ptr< AudioSegment > > AudioSegmentFactory::CreateAudioSegmentSequenceForward ( double  playbackStartTime )

private

Definition at line 40 of file AudioSegmentFactory.cpp.

{
   auto sortedClips = mClips;
   std::sort(
      sortedClips.begin(), sortedClips.end(),
      [](const std::shared_ptr<const ClipInterface>& a,
         const std::shared_ptr<const ClipInterface>& b) {
         return a->GetPlayStartTime() < b->GetPlayStartTime();
      });
   std::vector<std::shared_ptr<AudioSegment>> segments;
   for (const auto& clip : sortedClips)
   {
      if (clip->GetPlayStartTime() > t0)
      {
         const auto numSamples =
            sampleCount { (clip->GetPlayStartTime() - t0) * mSampleRate + .5 };
         segments.push_back(
            std::make_shared<SilenceSegment>(mNumChannels, numSamples));
         t0 = clip->GetPlayStartTime();
      }
      else if (clip->GetPlayEndTime() <= t0)
         continue;
      segments.push_back(std::make_shared<ClipSegment>(
         *clip, t0 - clip->GetPlayStartTime(), PlaybackDirection::forward));
      t0 = clip->GetPlayEndTime();
   }
   return segments;
}

References forward, mClips, mNumChannels, and mSampleRate.

Referenced by CreateAudioSegmentSequence().

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Member Data Documentation

mClips

const ClipConstHolders AudioSegmentFactory::mClips

private

Definition at line 40 of file AudioSegmentFactory.h.

Referenced by CreateAudioSegmentSequenceBackward(), and CreateAudioSegmentSequenceForward().

mNumChannels

const int AudioSegmentFactory::mNumChannels

private

Definition at line 42 of file AudioSegmentFactory.h.

Referenced by CreateAudioSegmentSequenceBackward(), and CreateAudioSegmentSequenceForward().

mSampleRate

const int AudioSegmentFactory::mSampleRate

private

Definition at line 41 of file AudioSegmentFactory.h.

Referenced by CreateAudioSegmentSequenceBackward(), and CreateAudioSegmentSequenceForward().

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

• AudioSegmentFactory.h
• AudioSegmentFactory.cpp