tracktion_ReverseRenderJob.h

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 /*
    ,--.                     ,--.     ,--.  ,--.
  ,-'  '-.,--.--.,--,--.,---.|  |,-.,-'  '-.`--' ,---. ,--,--,      Copyright 2024
  '-.  .-'|  .--' ,-.  | .--'|     /'-.  .-',--.| .-. ||      \   Tracktion Software
    |  |  |  |  \ '-'  \ `--.|  \  \  |  |  |  |' '-' '|  ||  |       Corporation
    `---' `--'   `--`--'`---'`--'`--' `---' `--' `---' `--''--'    www.tracktion.com
 
    Tracktion Engine uses a GPL/commercial licence - see LICENCE.md for details.
*/
 
namespace tracktion { inline namespace engine
{
 
//==============================================================================
class ReverseRenderJob   : public RenderManager::Job
{
public:
    static Ptr getOrCreateRenderJob (Engine& e,
                                     const juce::File& source,
                                     const juce::File& destination)
    {
        AudioFile targetFile (e, destination);
 
        if (auto ptr = e.getRenderManager().getRenderJobWithoutCreating (targetFile))
            return ptr;
 
        return *new ReverseRenderJob (e, source, targetFile);
    }
 
protected:
    //==============================================================================
    bool setUpRender() override                     { return true; }
 
    bool renderNextBlock() override
    {
        CRASH_TRACER
 
        juce::TemporaryFile tempFile (proxy.getFile(), juce::TemporaryFile::useHiddenFile);
        success = AudioFileUtils::reverse (engine, source, tempFile.getFile(), progress, this);
 
        if (success)
        {
            tempFile.overwriteTargetFileWithTemporary();
        }
        else
        {
            // if we fail here just copy the source to the destination to avoid loops
            source.copyFileTo (proxy.getFile());
            jassertfalse;
        }
 
        // validates the AudioFile by giving it a sample rate etc.
        engine.getAudioFileManager().checkFileForChangesAsync (proxy);
 
        return true;
    }
 
    bool completeRender() override                  { return success; }
 
private:
    //==============================================================================
    ReverseRenderJob (Engine& e, const juce::File& src, const AudioFile& destination)
        : Job (e, destination), source (src)
    {
    }
 
    juce::File source;
    bool success = false;
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ReverseRenderJob)
};
 
}} // namespace tracktion { inline namespace engine