Use Settings for default sample rate and format...

... The first is an example of a Setting with a computed default value.

Also making a new file to hold them, separate from the GUI that changes them
in QualityPrefs; fewer things depend on QualityPrefs

src/AudioIO.cpp

@@ -466,7 +466,7 @@ time warp info and AudioIOListener and whether the playback is looped.
 #include "WaveTrack.h"
 
 #include "effects/RealtimeEffectManager.h"
-#include "prefs/QualityPrefs.h"
+#include "prefs/QualitySettings.h"
 #include "prefs/RecordingPrefs.h"
 #include "widgets/MeterPanelBase.h"
 #include "widgets/AudacityMessageBox.h"
@@ -1445,7 +1445,7 @@ void AudioIO::StartMonitoring( const AudioIOStartStreamOptions &options )
       return;
 
    bool success;
-   auto captureFormat = QualityPrefs::SampleFormatChoice();
+   auto captureFormat = QualitySettings::SampleFormatChoice();
    auto captureChannels = AudioIORecordChannels.Read();
    gPrefs->Read(wxT("/AudioIO/SWPlaythrough"), &mSoftwarePlaythrough, false);
    int playbackChannels = 0;

src/CMakeLists.txt

@@ -718,6 +718,8 @@ list( APPEND SOURCES
       prefs/PrefsPanel.h
       prefs/QualityPrefs.cpp
       prefs/QualityPrefs.h
+      prefs/QualitySettings.cpp
+      prefs/QualitySettings.h
       prefs/RecordingPrefs.cpp
       prefs/RecordingPrefs.h
       prefs/SpectrogramSettings.cpp

src/ProjectManager.cpp

@@ -36,7 +36,7 @@ Paul Licameli split from AudacityProject.cpp
 #include "wxFileNameWrapper.h"
 #include "import/Import.h"
 #include "import/ImportMIDI.h"
-#include "prefs/QualityPrefs.h"
+#include "prefs/QualitySettings.h"
 #include "toolbars/MixerToolBar.h"
 #include "toolbars/SelectionBar.h"
 #include "toolbars/SpectralSelectionBar.h"
@@ -1052,7 +1052,7 @@ int ProjectManager::GetEstimatedRecordingMinsLeftOnDisk(long lCaptureChannels) {
    auto &project = mProject;
 
    // Obtain the current settings
-   auto oCaptureFormat = QualityPrefs::SampleFormatChoice();
+   auto oCaptureFormat = QualitySettings::SampleFormatChoice();
    if (lCaptureChannels == 0)
       lCaptureChannels = AudioIORecordChannels.Read();
 

src/ProjectSettings.cpp

@@ -14,6 +14,7 @@ Paul Licameli split from AudacityProject.cpp
 
 #include "AudioIOBase.h"
 #include "Project.h"
+#include "prefs/QualitySettings.h"
 #include "widgets/NumericTextCtrl.h"
 #include "prefs/TracksBehaviorsPrefs.h"
 
@@ -67,15 +68,17 @@ ProjectSettings::ProjectSettings(AudacityProject &project)
 }
 , mSnapTo( gPrefs->Read(wxT("/SnapTo"), SNAP_OFF) )
 {
-   if (!gPrefs->Read(wxT("/SamplingRate/DefaultProjectSampleRate"), &mRate,
+   int intRate;
-         AudioIOBase::GetOptimalSupportedSampleRate())) {
+   if ( !QualitySettings::DefaultSampleRate.Read( &intRate ) ) {
       // The default given above can vary with host/devices. So unless there is
       // an entry for the default sample rate in audacity.cfg, Audacity can open
       // with a rate which is different from the rate with which it closed.
       // See bug 1879.
-      gPrefs->Write(wxT("/SamplingRate/DefaultProjectSampleRate"), mRate);
+      QualitySettings::DefaultSampleRate.Write( mRate );
       gPrefs->Flush();
    }
+   else
+      mRate = intRate;
    gPrefs->Read(wxT("/GUI/SyncLockTracks"), &mIsSyncLocked, false);
 
    bool multiToolActive = false;
@@ -110,8 +113,7 @@ void ProjectSettings::UpdatePrefs()
    // The DefaultProjectSample rate is the rate for new projects.
    // Do not change this project's rate, unless there are no tracks.
    if( TrackList::Get( *this ).size() == 0){
-      gPrefs->Read(wxT("/SamplingRate/DefaultProjectSampleRate"), &mRate,
+      mRate = QualityDefaultSampleRate.Read();
-         AudioIOBase::GetOptimalSupportedSampleRate());
       // If necessary, we change this rate in the selection toolbar too.
       auto bar = SelectionBar::Get( *this );
       bar.SetRate( mRate );

src/WaveTrack.cpp

@@ -51,7 +51,7 @@ from the project that will own the track.
 #include "Prefs.h"
 
 #include "effects/TimeWarper.h"
-#include "prefs/QualityPrefs.h"
+#include "prefs/QualitySettings.h"
 #include "prefs/SpectrogramSettings.h"
 #include "prefs/TracksPrefs.h"
 #include "prefs/TracksBehaviorsPrefs.h"
@@ -85,7 +85,7 @@ WaveTrack::Holder WaveTrackFactory::DuplicateWaveTrack(const WaveTrack &orig)
 WaveTrack::Holder WaveTrackFactory::NewWaveTrack(sampleFormat format, double rate)
 {
    if (format == (sampleFormat)0)
-      format = QualityPrefs::SampleFormatChoice();
+      format = QualitySettings::SampleFormatChoice();
    if (rate == 0)
       rate = mSettings.GetRate();
    return std::make_shared<WaveTrack> ( mpFactory, format, rate );

src/effects/Effect.cpp

@@ -33,6 +33,7 @@
 #include "../ProjectAudioManager.h"
 #include "../ProjectFileIO.h"
 #include "../ProjectSettings.h"
+#include "../prefs/QualitySettings.h"
 #include "../ShuttleGui.h"
 #include "../Shuttle.h"
 #include "../ViewInfo.h"
@@ -112,9 +113,8 @@ Effect::Effect()
    // PRL:  I think this initialization of mProjectRate doesn't matter
    // because it is always reassigned in DoEffect before it is used
    // STF: but can't call AudioIOBase::GetOptimalSupportedSampleRate() here.
-   gPrefs->Read(wxT("/SamplingRate/DefaultProjectSampleRate"),
+   // (Which is called to compute the default-default value.)  (Bug 2280)
-                &mProjectRate,
+   mProjectRate = QualitySettings::DefaultSampleRate.ReadWithDefault(44100);
-                44100);
 
    mIsBatch = false;
 }

src/import/ImportPlugin.cpp

@@ -13,7 +13,7 @@ Paul Licameli split from Import.cpp
 #include <wx/filename.h>
 #include "../WaveTrack.h"
 #include "../widgets/ProgressDialog.h"
-#include "../prefs/QualityPrefs.h"
+#include "../prefs/QualitySettings.h"
 
 ImportPlugin::ImportPlugin(FileExtensions supportedExtensions):
    mExtensions( std::move( supportedExtensions ) )
@@ -54,7 +54,7 @@ void ImportFileHandle::CreateProgress()
 sampleFormat ImportFileHandle::ChooseFormat(sampleFormat effectiveFormat)
 {
    // Consult user preference
-   auto defaultFormat = QualityPrefs::SampleFormatChoice();
+   auto defaultFormat = QualitySettings::SampleFormatChoice();
 
    // Don't choose format narrower than effective or default
    auto format = std::max(effectiveFormat, defaultFormat);

src/menus/TrackMenus.cpp

@@ -27,7 +27,7 @@
 #include "../commands/CommandManager.h"
 #include "../effects/EffectManager.h"
 #include "../effects/EffectUI.h"
-#include "../prefs/QualityPrefs.h"
+#include "../prefs/QualitySettings.h"
 #include "../tracks/playabletrack/wavetrack/ui/WaveTrackControls.h"
 #include "../widgets/ASlider.h"
 #include "../widgets/AudacityMessageBox.h"
@@ -52,7 +52,7 @@ void DoMixAndRender
    auto &tracks = TrackList::Get( project );
    auto &trackFactory = WaveTrackFactory::Get( project );
    auto rate = settings.GetRate();
-   auto defaultFormat = QualityPrefs::SampleFormatChoice();
+   auto defaultFormat = QualitySettings::SampleFormatChoice();
    auto &trackPanel = TrackPanel::Get( project );
    auto &window = ProjectWindow::Get( project );
 
@@ -609,7 +609,7 @@ void OnNewWaveTrack(const CommandContext &context)
    auto &trackFactory = WaveTrackFactory::Get( project );
    auto &window = ProjectWindow::Get( project );
 
-   auto defaultFormat = QualityPrefs::SampleFormatChoice();
+   auto defaultFormat = QualitySettings::SampleFormatChoice();
 
    auto rate = settings.GetRate();
 
@@ -633,7 +633,7 @@ void OnNewStereoTrack(const CommandContext &context)
    auto &trackFactory = WaveTrackFactory::Get( project );
    auto &window = ProjectWindow::Get( project );
 
-   auto defaultFormat = QualityPrefs::SampleFormatChoice();
+   auto defaultFormat = QualitySettings::SampleFormatChoice();
    auto rate = settings.GetRate();
 
    SelectUtilities::SelectNone( project );

src/prefs/QualityPrefs.cpp

@@ -17,6 +17,7 @@
 
 
 #include "QualityPrefs.h"
+#include "QualitySettings.h"
 
 #include <wx/choice.h>
 #include <wx/defs.h>
@@ -30,26 +31,6 @@
 
 #define ID_SAMPLE_RATE_CHOICE           7001
 
-//////////
-
-static EnumSetting< sampleFormat > formatSetting{
-   wxT("/SamplingRate/DefaultProjectSampleFormatChoice"),
-   {
-      { wxT("Format16Bit"), XO("16-bit") },
-      { wxT("Format24Bit"), XO("24-bit") },
-      { wxT("Format32BitFloat"), XO("32-bit float") }
-   },
-   2, // floatSample
-
-   // for migrating old preferences:
-   {
-      int16Sample,
-      int24Sample,
-      floatSample
-   },
-   wxT("/SamplingRate/DefaultProjectSampleFormat"),
-};
-
 //////////
 BEGIN_EVENT_TABLE(QualityPrefs, PrefsPanel)
    EVT_CHOICE(ID_SAMPLE_RATE_CHOICE, QualityPrefs::OnSampleRateChoice)
@@ -85,9 +66,7 @@ void QualityPrefs::Populate()
 {
    // First any pre-processing for constructing the GUI.
    GetNamesAndLabels();
-   gPrefs->Read(wxT("/SamplingRate/DefaultProjectSampleRate"),
+   mOtherSampleRateValue = QualitySettings::DefaultSampleRate.Read();
-                &mOtherSampleRateValue,
-                AudioIOBase::GetOptimalSupportedSampleRate());
 
    //------------------------- Main section --------------------
    // Now construct the GUI itself.
@@ -148,17 +127,17 @@ void QualityPrefs::PopulateOrExchange(ShuttleGui & S)
          {
             // First the choice...
             // We make sure it uses the ID we want, so that we get changes
-            S.Id(ID_SAMPLE_RATE_CHOICE);
             // We make sure we have a pointer to it, so that we can drive it.
-            mSampleRates = S.TieNumberAsChoice( {},
+            mSampleRates =
-                                       {wxT("/SamplingRate/DefaultProjectSampleRate"),
+            S
-                                        AudioIOBase::GetOptimalSupportedSampleRate()},
+               .Id(ID_SAMPLE_RATE_CHOICE)
+               .TieNumberAsChoice( {},
+                  QualitySettings::DefaultSampleRate,
                   mSampleRateNames,
                   &mSampleRateLabels,
                   // If the value in Prefs isn't in the list, then we want
                   // the last item, 'Other...' to be shown.
-                                       mSampleRateNames.size() - 1
+                  mSampleRateNames.size() - 1 );
-                                       );
 
             // Now do the edit box...
             mOtherSampleRate = S.TieNumericTextBox( {},
@@ -167,8 +146,9 @@ void QualityPrefs::PopulateOrExchange(ShuttleGui & S)
          }
          S.EndHorizontalLay();
 
-         S.TieChoice(XXO("Default Sample &Format:"),
+         S
-                     formatSetting);
+            .TieChoice( XXO("Default Sample &Format:"),
+                       QualitySettings::SampleFormatSetting );
       }
       S.EndMultiColumn();
    }
@@ -223,7 +203,7 @@ bool QualityPrefs::Commit()
    // The complex compound control may have value 'other' in which case the
    // value in prefs comes from the second field.
    if (mOtherSampleRate->IsEnabled()) {
-      gPrefs->Write(wxT("/SamplingRate/DefaultProjectSampleRate"), mOtherSampleRateValue);
+      QualitySettings::DefaultSampleRate.Write( mOtherSampleRateValue );
       gPrefs->Flush();
    }
 
@@ -243,8 +223,3 @@ PrefsPanel::Registration sAttachment{ "Quality",
 };
 }
 
-sampleFormat QualityPrefs::SampleFormatChoice()
-{
-   return formatSetting.ReadEnum();
-}
-

src/prefs/QualityPrefs.h

@@ -37,8 +37,6 @@ class AUDACITY_DLL_API QualityPrefs final : public PrefsPanel
    wxString HelpPageName() override;
    void PopulateOrExchange(ShuttleGui & S) override;
 
-   static sampleFormat SampleFormatChoice();
-
  private:
    void Populate();
    void GetNamesAndLabels();

src/prefs/QualitySettings.cpp

@@ -0,0 +1,41 @@
+/**********************************************************************
+ 
+ Audacity: A Digital Audio Editor
+ 
+ QualitySettings.cpp
+ 
+ Paul Licameli split from QualityPrefs.cpp
+ 
+ **********************************************************************/
+
+#include "QualitySettings.h"
+#include "AudioIOBase.h"
+#include "Internat.h"
+
+IntSetting QualitySettings::DefaultSampleRate{
+   L"/SamplingRate/DefaultProjectSampleRate",
+   AudioIOBase::GetOptimalSupportedSampleRate
+};
+
+EnumSetting< sampleFormat > QualitySettings::SampleFormatSetting{
+   L"/SamplingRate/DefaultProjectSampleFormatChoice",
+   {
+      { L"Format16Bit", XO("16-bit") },
+      { L"Format24Bit", XO("24-bit") },
+      { L"Format32BitFloat", XO("32-bit float") }
+   },
+   2, // floatSample
+
+   // for migrating old preferences:
+   {
+      int16Sample,
+      int24Sample,
+      floatSample
+   },
+   L"/SamplingRate/DefaultProjectSampleFormat",
+};
+
+sampleFormat QualitySettings::SampleFormatChoice()
+{
+   return SampleFormatSetting.ReadEnum();
+}

src/prefs/QualitySettings.h

@@ -0,0 +1,24 @@
+/**********************************************************************
+ 
+ Audacity: A Digital Audio Editor
+ 
+ QualitySettings.h
+ 
+ Paul Licameli split from QualityPrefs.h
+ 
+ **********************************************************************/
+
+#ifndef __AUDACITY_QUALITY_SETTINGS__
+#define __AUDACITY_QUALITY_SETTINGS__
+
+#include "Prefs.h" // for EnumSetting
+
+class IntSetting;
+
+namespace QualitySettings {
+extern IntSetting DefaultSampleRate;
+extern EnumSetting< sampleFormat > SampleFormatSetting;
+extern sampleFormat SampleFormatChoice();
+}
+
+#endif

src/toolbars/SelectionBar.cpp

@@ -60,6 +60,7 @@ with changes in the SelectionBar.
 #include "../ProjectSettings.h"
 #include "../Snap.h"
 #include "../ViewInfo.h"
+#include "../prefs/QualitySettings.h"
 #include "../AllThemeResources.h"
 
 #if wxUSE_ACCESSIBILITY
@@ -123,8 +124,7 @@ SelectionBar::SelectionBar( AudacityProject &project )
    // Refer to bug #462 for a scenario where the division-by-zero causes
    // Audacity to fail.
    // We expect mRate to be set from the project later.
-   mRate = (double) gPrefs->Read(wxT("/SamplingRate/DefaultProjectSampleRate"),
+   mRate = (double) QualitySettings::DefaultSampleRate.Read();
-      AudioIOBase::GetOptimalSupportedSampleRate());
 
    // Selection mode of 0 means showing 'start' and 'end' only.
    mSelectionMode = gPrefs->ReadLong(wxT("/SelectionToolbarMode"),  0);