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ReadAheadManager: fix loop wraparound reader condition #11717

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merged 5 commits into from Jul 9, 2023
Merged

ReadAheadManager: fix loop wraparound reader condition #11717

merged 5 commits into from Jul 9, 2023

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ronso0
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@ronso0 ronso0 commented Jul 7, 2023 •
edited

should fix a regression caused by #11704 / #11532
noticed because HotcueControlTest.SavedLoopMove failed in Coverage check.

Though requested samples shouldn't be negative in the first place, so maybe we overlooked something.

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ronso0 commented Jul 7, 2023

@daschuer please take a look.

@ronso0 ronso0 marked this pull request as draft July 7, 2023 01:37
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daschuer commented Jul 7, 2023

Thank you. The changes are looking reasonable.
Is kLogger.critical() crashing the release version? Maybe we should make this a warning. And keep the party going.

ronso0
ronso0 commented Jul 7, 2023
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src/engine/readaheadmanager.cpp Outdated
@@ -160,7 +160,7 @@ SINT ReadAheadManager::getNextSamples(double dRate, CSAMPLE* pOutput,
}
}

if (crossFadeSamples) {
if (crossFadeSamples >= 0) {
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still trying to figure when crossFadeSamples < 0 occurs.
if I get it right this can happen only if the overshoot (fractional frames?) corrects the curr. play pos AND we're looping over the track start, so that loop_read_position > crossFadeStart?
so we actually thow away the overshoot, no?

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The code below should do nothing in case of 0, so we can safe the time-

Suggested change
if (crossFadeSamples >= 0) {
if (crossFadeSamples > 0) {

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ronso0 commented Jul 7, 2023

Is kLogger.critical() crashing the release version? Maybe we should make this a warning. And keep the party going.

qFatal() does IIUC, and qCritical() does, too "if the environment variable QT_FATAL_CRITICALS is not empty"
https://doc.qt.io/qt-6/qtlogging.html#qCritical
Don't know why this would be enabled. Do you? Sure we can make it a warning.

@ronso0 ronso0 marked this pull request as ready for review July 7, 2023 10:37
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daschuer commented Jul 7, 2023

qFatal() does IIUC, and qCritical() does, too "if the environment variable QT_FATAL_CRITICALS is not empty"

Oh I was confused because our assertions are Critical and elevated Fatal for a crash.
So all fine.

daschuer
daschuer requested changes Jul 7, 2023
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I want still investigate why the value is negative. But that can be done after merge.

src/engine/readaheadmanager.cpp Outdated
@@ -160,7 +160,7 @@ SINT ReadAheadManager::getNextSamples(double dRate, CSAMPLE* pOutput,
}
}

if (crossFadeSamples) {
if (crossFadeSamples >= 0) {
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The code below should do nothing in case of 0, so we can safe the time-

Suggested change
if (crossFadeSamples >= 0) {
if (crossFadeSamples > 0) {

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ronso0 commented Jul 9, 2023

so this one's ready

daschuer
daschuer approved these changes Jul 9, 2023
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It turns out that the value has to be negative, because the loop cue is shifted into the pre-roll.
So this is OK.

Unfortunately this issue is also a 2.3 issue. I will add only the fix to the 2.3 branch without the refactoring.

LGTM

@daschuer daschuer merged commit 5c299f5 into mixxxdj:2.4 Jul 9, 2023
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daschuer added a commit that referenced this pull request Jul 9, 2023
@daschuer
Don't try to crossfade a negative length
3ec60a7 
This a the backport of the fix from #11717
@ronso0 ronso0 deleted the cachingreader-debug branch July 9, 2023 20:30
@daschuer daschuer added this to the 2.4.0 milestone Dec 29, 2023
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