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winrt: Fix crash when camera unloaded while searching focus.

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Return early from focus related methods when async operation reports
that it is write protected.

Change-Id: I41bf9121e7ae431e5158b5e4c43cde582c30dfd7
Task-Id: QTBUG-49347
Reviewed-by: Peng Wu <peng.wu@intopalo.com>
Reviewed-by: Andrew Knight <andrew.knight@intopalo.com>
This commit is contained in:
Samuel Nevala
2015-11-11 10:05:04 +02:00
parent b05fac61e0
commit da0b7aea9a
2 changed files with 14 additions and 8 deletions
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11
src/plugins/winrt/qwinrtcameracontrol.cpp
View File

@@ -1154,8 +1154,11 @@ bool QWinRTCameraControl::focus()
return false;
ComPtr<IAsyncAction> op;
HRESULT hr = d->focusControl->FocusAsync(&op);
if (HRESULT_CODE(hr) == ERROR_OPERATION_IN_PROGRESS)
return true;
const long errorCode = HRESULT_CODE(hr);
if (errorCode == ERROR_OPERATION_IN_PROGRESS
|| errorCode == ERROR_WRITE_PROTECT) {
return false;
}
Q_ASSERT_SUCCEEDED(hr);
hr = QWinRTFunctions::await(op, QWinRTFunctions::ProcessThreadEvents);
Q_ASSERT_SUCCEEDED(hr);
@@ -1184,6 +1187,8 @@ bool QWinRTCameraControl::lockFocus()
Q_ASSERT_SUCCEEDED(hr);
ComPtr<IAsyncAction> op;
hr = focusControl2->LockAsync(&op);
if (HRESULT_CODE(hr) == ERROR_WRITE_PROTECT)
return false;
Q_ASSERT_SUCCEEDED(hr);
return QWinRTFunctions::await(op) == S_OK;
}
@@ -1198,6 +1203,8 @@ bool QWinRTCameraControl::unlockFocus()
Q_ASSERT_SUCCEEDED(hr);
ComPtr<IAsyncAction> op;
hr = focusControl2->UnlockAsync(&op);
if (HRESULT_CODE(hr) == ERROR_WRITE_PROTECT)
return false;
Q_ASSERT_SUCCEEDED(hr);
return QWinRTFunctions::await(op) == S_OK;
}

11
src/plugins/winrt/qwinrtcameralockscontrol.cpp
View File

@@ -104,10 +104,10 @@ void QWinRTCameraLocksControl::searchAndLockFocus()
} else {
m_focusLockStatus = QCamera::Searching;
emit lockStatusChanged(QCamera::LockFocus, m_focusLockStatus, QCamera::LockAcquired);
cameraControl->focus();
cameraControl->lockFocus();
m_focusLockStatus = QCamera::Locked;
emit lockStatusChanged(QCamera::LockFocus, m_focusLockStatus, QCamera::LockAcquired);
if (cameraControl->focus()) {
m_focusLockStatus = cameraControl->lockFocus() ? QCamera::Locked : QCamera::Unlocked;
emit lockStatusChanged(QCamera::LockFocus, m_focusLockStatus, QCamera::LockAcquired);
}
}
}
@@ -117,8 +117,7 @@ void QWinRTCameraLocksControl::unlockFocus()
return;
QWinRTCameraControl *cameraControl = qobject_cast<QWinRTCameraControl *>(parent());
Q_ASSERT(cameraControl);
cameraControl->unlockFocus();
m_focusLockStatus = QCamera::Unlocked;
m_focusLockStatus = cameraControl->unlockFocus() ? QCamera::Unlocked : QCamera::Locked;
emit lockStatusChanged(QCamera::LockFocus, m_focusLockStatus, QCamera::UserRequest);
}