renderer/decoder: use same background mechanism to conform audio as well

app/render/indexmanager.h

@@ -4,6 +4,7 @@
 #include <QObject>
 
 #include "project/item/footage/stream.h"
+#include "task/conform/conform.h"
 #include "task/index/index.h"
 
 class IndexManager : public QObject
@@ -16,29 +17,42 @@ public:
   static IndexManager* instance();
   static void DestroyInstance();
 
-  bool IsIndexing(StreamPtr stream);
+  bool IsIndexing(StreamPtr stream) const;
+  bool IsConforming(AudioStreamPtr stream, const AudioRenderingParams& params) const;
 
 public slots:
   void StartIndexingStream(StreamPtr stream);
+  void StartConformingStream(AudioStreamPtr stream, const AudioRenderingParams& params);
 
 signals:
   void StreamIndexUpdated(Stream* stream);
+  void StreamConformAppended(Stream* stream, const AudioRenderingParams& params);
 
 private:
   static IndexManager* instance_;
 
-  struct StreamThreadPair {
+  struct IndexPair {
     StreamPtr stream;
     IndexTask* task;
   };
 
-  QList<StreamThreadPair> threads_;
+  struct ConformPair {
+    StreamPtr stream;
+    AudioRenderingParams params;
+    ConformTask* task;
+  };
+
+  QList<IndexPair> indexing_;
+
+  QList<ConformPair> conforming_;
 
 private slots:
   void IndexTaskFinished();
 
   void StreamIndexUpdatedEvent();
 
+  void StreamConformAppendedEvent(const AudioRenderingParams& params);
+
 };
 
 #endif // INDEXMANAGER_H