SqliteSampleBlock.cpp File Reference

#include <float.h>
#include <sqlite3.h>
#include "BasicUI.h"
#include "DBConnection.h"
#include "ProjectFileIO.h"
#include "SampleFormat.h"
#include "XMLTagHandler.h"
#include "SampleBlock.h"
#include "UndoManager.h"
#include "WaveTrack.h"
#include "SentryHelper.h"
#include <wx/log.h>

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Classes
class	SqliteSampleBlock
	Implementation of SampleBlock using Sqlite database. More...
class	SqliteSampleBlockFactory
	Implementation of SampleBlockFactory using Sqlite database. More...

Functions
static size_t	EstimateRemovedBlocks (AudacityProject &project, size_t begin, size_t end)
	Just to find a denominator for a progress indicator. More...

Variables
static std::map< SampleBlockID, std::shared_ptr< SqliteSampleBlock > >	sSilentBlocks
static SampleBlockFactory::Factory::Scope	scope

Function Documentation

EstimateRemovedBlocks()

static size_t EstimateRemovedBlocks ( AudacityProject &  project, size_t  begin, size_t  end  )

static

Just to find a denominator for a progress indicator.

This estimate procedure should in fact be exact

Definition at line 1016 of file SqliteSampleBlock.cpp.

{
   auto &manager = UndoManager::Get(project);
 
   // Collect ids that survive
   SampleBlockIDSet wontDelete;
   auto f = [&](const UndoStackElem &elem){
      InspectBlocks(*elem.state.tracks, {}, &wontDelete);
   };
   manager.VisitStates(f, 0, begin);
   manager.VisitStates(f, end, manager.GetNumStates());
   if (const auto saved = manager.GetSavedState(); saved >= 0)
      manager.VisitStates(f, saved, saved + 1);
   InspectBlocks(TrackList::Get(project), {}, &wontDelete);
 
   // Collect ids that won't survive (and are not negative pseudo ids)
   SampleBlockIDSet seen, mayDelete;
   manager.VisitStates( [&](const UndoStackElem &elem){
      auto &tracks = *elem.state.tracks;
      InspectBlocks(tracks, [&]( const SampleBlock &block ){
         auto id = block.GetBlockID();
         if ( id > 0 && !wontDelete.count( id ) )
            mayDelete.insert( id );
      },
      &seen);
   }, begin, end );
   return mayDelete.size();
}

References PackedArray::begin(), PackedArray::end(), UndoManager::Get(), TrackList::Get(), SampleBlock::GetBlockID(), InspectBlocks(), manager, UndoStackElem::state, and UndoState::tracks.

Referenced by SqliteSampleBlockFactory::OnBeginPurge().

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Variable Documentation

scope

SampleBlockFactory::Factory::Scope scope

static

Initial value:

{ []( AudacityProject &project )
{
   return std::make_shared<SqliteSampleBlockFactory>( project );
} }

Definition at line 1081 of file SqliteSampleBlock.cpp.

sSilentBlocks

std::map< SampleBlockID, std::shared_ptr<SqliteSampleBlock> > sSilentBlocks

static

Definition at line 132 of file SqliteSampleBlock.cpp.

Referenced by SqliteSampleBlockFactory::DoCreateSilent().