itsmattkc
e30d278327
Since this class is regularly accessed by multiple threads, it makes the most sense to make all of its functions thread-safe.
144 lines
3.1 KiB
C++
144 lines
3.1 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2019 Olive Team
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "playbackcache.h"
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OLIVE_NAMESPACE_ENTER
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void PlaybackCache::Invalidate(const TimeRange &r)
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{
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QMutexLocker locker(&lock_);
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NoLockInvalidate(r);
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locker.unlock();
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emit Invalidated(r);
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}
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void PlaybackCache::InvalidateAll()
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{
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QMutexLocker locker(&lock_);
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TimeRange invalidate_range(0, length_);
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NoLockInvalidate(invalidate_range);
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locker.unlock();
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emit Invalidated(invalidate_range);
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}
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void PlaybackCache::SetLength(const rational &r)
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{
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QMutexLocker locker(&lock_);
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NoLockSetLength(r);
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}
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void PlaybackCache::Shift(const rational &from, const rational &to)
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{
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QMutexLocker locker(&lock_);
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// An region between `from` and `to` will be inserted or spliced out
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TimeRangeList ranges_to_shift = invalidated_.Intersects(TimeRange(from, RATIONAL_MAX));
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// Remove everything from the minimum point
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invalidated_.RemoveTimeRange(TimeRange(qMin(from, to), RATIONAL_MAX));
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// Shift everything in our ranges to shift list
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//
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// `diff` is POSITIVE when moving forward -> and NEGATIVE when moving backward <-
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rational diff = to - from;
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foreach (const TimeRange& r, ranges_to_shift) {
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invalidated_.InsertTimeRange(r + diff);
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}
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ShiftEvent(from, to);
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if (diff > rational()) {
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// If shifting forward, add this section to the invalidated region
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TimeRange invalidate_range(from, to);
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NoLockInvalidate(invalidate_range);
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locker.unlock();
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emit Invalidated(invalidate_range);
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}
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}
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void PlaybackCache::Validate(const TimeRange &r)
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{
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QMutexLocker locker(&lock_);
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NoLockValidate(r);
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locker.unlock();
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emit Validated(r);
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}
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void PlaybackCache::NoLockInvalidate(const TimeRange &r)
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{
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invalidated_.InsertTimeRange(r);
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InvalidateEvent(r);
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}
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void PlaybackCache::NoLockValidate(const TimeRange &r)
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{
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invalidated_.RemoveTimeRange(r);
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}
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void PlaybackCache::NoLockSetLength(const rational &r)
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{
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if (length_ == r) {
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// Same length - do nothing
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return;
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}
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if (r > length_) {
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// If new length is greater, simply extend the invalidated range for now
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invalidated_.InsertTimeRange(TimeRange(length_, r));
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} else {
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// If new length is smaller, removed hashes
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invalidated_.RemoveTimeRange(TimeRange(r, length_));
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}
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LengthChangedEvent(length_, r);
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length_ = r;
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}
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void PlaybackCache::LengthChangedEvent(const rational &, const rational &)
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{
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}
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void PlaybackCache::InvalidateEvent(const TimeRange &)
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{
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}
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void PlaybackCache::ShiftEvent(const rational &, const rational &)
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{
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}
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OLIVE_NAMESPACE_EXIT
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