itsmattkc
2599c1e8a4
Rather than writing the entire sequence audio to disk every change, now we just write the parts we need to write.
103 lines
2.2 KiB
C++
103 lines
2.2 KiB
C++
#include "audiobackend.h"
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#include "audioworker.h"
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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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QIODevice *AudioBackend::GetAudioPullDevice()
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{
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pull_device_.setFileName(CachePathName());
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return &pull_device_;
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}
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void AudioBackend::InvalidateCache(const rational &start_range, const rational &end_range)
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{
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/*
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// Truncate to length if necessary
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int max_length_in_bytes = params().time_to_bytes(viewer_node()->Length());
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if (pcm_data_.size() > max_length_in_bytes) {
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pcm_data_.resize(max_length_in_bytes);
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}
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*/
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AudioRenderBackend::InvalidateCache(start_range, end_range);
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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(decoder_cache());
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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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bool AudioBackend::CompileInternal()
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{
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// This backend doesn't compile anything yet
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return true;
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}
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void AudioBackend::DecompileInternal()
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{
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// This backend doesn't compile anything yet
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}
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void AudioBackend::ConnectWorkerToThis(RenderWorker *worker)
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{
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connect(worker, SIGNAL(CompletedCache(NodeDependency)), this, SLOT(ThreadCompletedCache(NodeDependency)));
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}
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void AudioBackend::ThreadCompletedCache(NodeDependency dep)
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{
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caching_ = false;
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QByteArray cached_samples = dep.node()->get_cached_value(dep.range()).toByteArray();
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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 = offset + length;
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QFile f(CachePathName());
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if (f.open(QFile::WriteOnly | QFile::Append)) {
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if (f.size() < out_point) {
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f.resize(out_point);
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}
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f.seek(offset);
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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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}
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CacheNext();
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}
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