score-plugin-lv2/LV2/ApplicationPlugin.hpp

#pragma once
#include <LV2/Context.hpp>
#include <LV2/Suil.hpp>
 
#include <score/plugins/application/GUIApplicationPlugin.hpp>
#include <score/serialization/DataStreamFwd.hpp>
 
#include <ossia/detail/hash_map.hpp>
 
#include <QString>
#include <QStringList>
#include <QVector>
#include <QtCore/qglobal.h>
 
#include <lilv/lilvmm.hpp>
 
#include <score_plugin_lv2_export.h>
 
#include <memory>
#include <vector>
#include <verdigris>
 
namespace Media
{
class PluginScanner;
}
 
namespace LV2
{
struct HostContext;
struct GlobalContext;
 
// Cached descriptor from a lv2puppet scan; persisted to QSettings("Effect/KnownLV2")
struct PluginInfo
{
  QString bundle;            // file system path to .lv2 bundle dir
  QString uri;               // canonical plug-in URI
  QString name;
  QString class_label;       // lv2:Class label (Reverb, Delay, ...)
  QString author;
  QString documentationLink; // author homepage URL
 
  // Cache invalidation key — re-scan when the manifest changes.
  qint64 mtime{};
  qint64 size{};
 
  int audio_in{};
  int audio_out{};
  int midi_in{};
  int midi_out{};
  int control_in{};
  int control_out{};
  int atom_in{};
  int atom_out{};
  int cv_in{};
 
  bool has_ui{};
  QStringList ui_uris;
  QStringList preset_uris;
  // Parallel to preset_uris: bundle that must be loaded before lilv_plugin_get_related
  QStringList preset_bundles;
 
  bool valid{};
};
 
class SCORE_PLUGIN_LV2_EXPORT ApplicationPlugin
    : public QObject
    , public score::ApplicationPlugin
{
  W_OBJECT(ApplicationPlugin)
public:
  explicit ApplicationPlugin(const score::ApplicationContext& app);
  void initialize() override;
  ~ApplicationPlugin() override;
 
  const std::vector<PluginInfo>& cachedDescriptors() const noexcept
  {
    return m_plugins;
  }
 
  const PluginInfo* findDescriptor(const QString& uri_or_bundle) const noexcept;
 
  // Idempotent; main thread only.
  void ensureBundleLoaded(const QString& uri_or_bundle);
 
  // Replace the descriptor cache wholesale (cache import, tests). Main thread only.
  void setCachedDescriptors(std::vector<PluginInfo> descriptors);
 
public:
  void descriptorsChanged() E_SIGNAL(SCORE_PLUGIN_LV2_EXPORT, descriptorsChanged);
 
public:
  Lilv::World lilv;
  std::unique_ptr<LV2::GlobalContext> lv2_context;
  LV2::HostContext lv2_host_context;
 
  const libsuil& suil = libsuil::instance();
 
  void forceRescan();
 
private:
  void rescanBundles();
  void onScanned(const QString& bundlePath, const class QJsonObject& obj);
  void addPluginsFromJson(const QString& bundlePath, const class QJsonArray& arr);
  void markBundleInvalid(const QString& bundlePath);
  void persistCache();
 
  QStringList discoverLv2Search();
  static QStringList discoverBundles(const QStringList& search);
  // Pick out LV2 spec bundles (atom, urid, ui, ...) so puppets can skip load_all
  static QStringList discoverSpecBundles(const QStringList& bundles);
 
#if QT_CONFIG(process)
  std::unique_ptr<Media::PluginScanner> m_scanner;
#endif
  bool m_scanRan{};
 
  std::vector<PluginInfo> m_plugins;
 
  ossia::hash_set<QString> m_loaded_bundles;
 
  QStringList m_spec_bundles;
 
  // Coalesces persistCache + descriptorsChanged into one fire per burst
  class QTimer* m_persistTimer{};
};
 
}
 
Q_DECLARE_METATYPE(LV2::PluginInfo)
Q_DECLARE_METATYPE(std::vector<LV2::PluginInfo>)
 
// Every TU that puts PluginInfo in a QVariant must see these, or Qt6 bakes
// null stream handlers into its copy of the QMetaTypeInterface.
SCORE_SERIALIZE_DATASTREAM_DECLARE(SCORE_PLUGIN_LV2_EXPORT, LV2::PluginInfo)
SCORE_SERIALIZE_DATASTREAM_DECLARE(SCORE_PLUGIN_LV2_EXPORT, std::vector<LV2::PluginInfo>)