SampleTrack.cpp

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/**********************************************************************
 
Audacity: A Digital Audio Editor
 
SampleTrack.cpp
 
Paul Licameli split from WaveTrack.cpp
 
**********************************************************************/
 
#include "SampleTrack.h"
 
#include <cmath>
 
SampleTrack::SampleTrack() = default;
 
SampleTrack::SampleTrack(const SampleTrack &other, ProtectedCreationArg &&a)
   : PlayableTrack(other, std::move(a))
   , SampleTrackAttachments(other)
{
}
 
SampleTrack::~SampleTrack() = default;
 
AudioGraph::ChannelType SampleTrack::GetChannelType() const
{
   if (TrackList::NChannels(*this) == 1)
      return AudioGraph::MonoChannel;
   else if (IsLeader())
      return AudioGraph::LeftChannel;
   else
      // TODO more-than-two-channels
      return AudioGraph::RightChannel;
}
 
static const Track::TypeInfo &typeInfo()
{
   static const Track::TypeInfo info{
      { "sample", "sample", XO("Sample Track") },
      true, &PlayableTrack::ClassTypeInfo() };
   return info;
}
 
auto SampleTrack::ClassTypeInfo() -> const TypeInfo &
{
   return typeInfo();
}
 
auto SampleTrack::GetTypeInfo() const -> const TypeInfo &
{
   return typeInfo();
}
 
sampleCount SampleTrack::TimeToLongSamples(double t0) const
{
   return sampleCount( floor(t0 * GetRate() + 0.5) );
}
 
double SampleTrack::LongSamplesToTime(sampleCount pos) const
{
   return pos.as_double() / GetRate();
}
 
WritableSampleTrack::WritableSampleTrack() = default;
 
WritableSampleTrack::WritableSampleTrack(
   const WritableSampleTrack &other, ProtectedCreationArg &&a
)  : SampleTrack(other, std::move(a))
{
}
 
WritableSampleTrack::~WritableSampleTrack() = default;
 
static const Track::TypeInfo &typeInfo2()
{
   static const Track::TypeInfo info{
      { "writable-sample", "writable-sample", XO("Writable Sample Track") },
      true, &SampleTrack::ClassTypeInfo() };
   return info;
}
 
auto WritableSampleTrack::ClassTypeInfo() -> const TypeInfo &
{
   return typeInfo2();
}
 
auto WritableSampleTrack::GetTypeInfo() const -> const TypeInfo &
{
   return typeInfo2();
}