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Bug2591, more mitigation: TransactionScopes mean fewer checkpoints...

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... and probably less contention with the checkpoint thread during recording,
and probably less total drop-out time when stress-testing recording with high
sample rates or slow external devices or both.

And another transaction scope for the post-processing of dropouts may reduce the
total time spent there.
This commit is contained in:
Paul Licameli 2020-11-25 13:45:48 -05:00
parent 1efebb7cdc
commit f5fd860430
1 changed files with 34 additions and 7 deletions
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41
src/AudioIO.cpp
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@ -461,6 +461,8 @@ time warp info and AudioIOListener and whether the playback is looped.
#include "prefs/GUISettings.h"
#include "Prefs.h"
#include "Project.h"
#include "DBConnection.h"
#include "ProjectFileIO.h"
#include "WaveTrack.h"
#include "effects/RealtimeEffectManager.h"
@ -2373,14 +2375,27 @@ void AudioIO::StopStream()
} );
}
for (auto &interval : mLostCaptureIntervals) {
auto &start = interval.first;
auto duration = interval.second;
for (auto &track : mCaptureTracks) {
GuardedCall([&] {
track->SyncLockAdjust(start, start + duration);
});
if (!mLostCaptureIntervals.empty())
{
// This scope may combine many splittings of wave tracks
// into one transaction, lessening the number of checkpoints
Optional<TransactionScope> pScope;
if (mOwningProject) {
auto &pIO = ProjectFileIO::Get(*mOwningProject);
pScope.emplace(pIO.GetConnection(), "Dropouts");
}
for (auto &interval : mLostCaptureIntervals) {
auto &start = interval.first;
auto duration = interval.second;
for (auto &track : mCaptureTracks) {
GuardedCall([&] {
track->SyncLockAdjust(start, start + duration);
});
}
}
if (pScope)
pScope->Commit();
}
if (pListener)
@ -2893,6 +2908,15 @@ void AudioIO::FillBuffers()
if (mAudioThreadShouldCallFillBuffersOnce ||
deltat >= mMinCaptureSecsToCopy)
{
// This scope may combine many appendings of wave tracks,
// and also an autosave, into one transaction,
// lessening the number of checkpoints
Optional<TransactionScope> pScope;
if (mOwningProject) {
auto &pIO = ProjectFileIO::Get(*mOwningProject);
pScope.emplace(pIO.GetConnection(), "Recording");
}
bool newBlocks = false;
// Append captured samples to the end of the WaveTracks.
@ -3027,6 +3051,9 @@ void AudioIO::FillBuffers()
auto pListener = GetListener();
if (pListener && newBlocks)
pListener->OnAudioIONewBlocks(&mCaptureTracks);
if (pScope)
pScope->Commit();
}
// end of record buffering
},