itsmattkc
53ae25a7cb
A huge optimization that ensures only the parts of a node graph that have changed get pushed to the renderer. For thread-safety, the node graph is copied elsewhere so that users can make changes asynchronously and the graph can update when its threads are ready. Up until now, if an input value changed, every node's values would be re-copied, or worse, if a connection was changed, the entire graph would be recopied. This has been negligible in testing since we've been largely testing with small graphs, but for massive projects, it's important that this be as optimized as possible.
113 lines
2.9 KiB
C++
113 lines
2.9 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 "audiobackend.h"
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#include "audioworker.h"
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OLIVE_NAMESPACE_ENTER
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AudioBackend::AudioBackend(QObject *parent) :
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AudioRenderBackend(parent)
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{
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}
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AudioBackend::~AudioBackend()
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{
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Close();
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}
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bool AudioBackend::InitInternal()
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{
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// Initiate one thread per CPU core
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for (int i=0;i<threads().size();i++) {
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// Create one processor object for each thread
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AudioWorker* processor = new AudioWorker(&node_copy_map_);
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processor->SetParameters(params());
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processors_.append(processor);
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}
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return true;
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}
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void AudioBackend::CloseInternal()
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{
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}
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void AudioBackend::ConnectWorkerToThis(RenderWorker *worker)
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{
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AudioRenderBackend::ConnectWorkerToThis(worker);
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connect(worker, &RenderWorker::CompletedCache, this, &AudioBackend::ThreadCompletedCache);
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}
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void AudioBackend::ThreadCompletedCache(NodeDependency dep, NodeValueTable data, qint64 job_time)
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{
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SetWorkerBusyState(static_cast<RenderWorker*>(sender()), false);
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if (job_time == render_job_info_.value(dep.range())) {
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render_job_info_.remove(dep.range());
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QByteArray cached_samples = data.Get(NodeParam::kSamples).value<SampleBufferPtr>()->toPackedData();
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int offset = params().time_to_bytes(dep.in());
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int length = params().time_to_bytes(dep.range().length());
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int out_point = qMin(offset + length, params().time_to_bytes(GetSequenceLength()));
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if (offset < out_point) {
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if (offset + length > out_point) {
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length = out_point - offset;
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}
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QFile f(CachePathName());
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if (f.open(QFile::ReadWrite)) {
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if (f.size() < out_point && !f.resize(out_point)) {
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qCritical() << "Failed to resize file" << CachePathName();
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}
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if (!f.seek(offset)) {
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qCritical() << "Failed to seek file" << CachePathName();
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}
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// Replace data with this data
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int copy_length = qMin(length, cached_samples.size());
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f.write(cached_samples.data(), copy_length);
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if (copy_length < length) {
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// Fill in remainder with silence
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QByteArray empty_space(length - copy_length, 0);
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f.write(empty_space);
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}
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f.close();
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} else {
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qWarning() << "Failed to write to cached PCM file";
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}
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}
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}
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CacheNext();
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}
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OLIVE_NAMESPACE_EXIT
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