Load crypto plugins from additional shared libraries

Currently crypto plugins are expected to be in libdrmdecrypt.so.
When there are multiple plugins supporting different schemes,
this approach requires source code integration across
vendors which is unmanagable.  Also, for integration with
MediaDrm where the crypto keys are obtained from a drm server,
the MediaCrypto plugin needs to interoperate with the MediaDrm
plugin. This change allows {MediaCrypto, MediaDrm} pairs that
are logically related to be implemented in a common shared
library.

Change-Id: I7f6638f29171f91609fc2d944396365568630b56

1 files changed, 12 insertions, 3 deletions

diff --git a/media/libmediaplayerservice/Crypto.h b/media/libmediaplayerservice/Crypto.h
index d066774..c44ae34 100644
--- a/media/libmediaplayerservice/Crypto.h
+++ b/media/libmediaplayerservice/Crypto.h
@@ -20,6 +20,9 @@
 
 #include <media/ICrypto.h>
 #include <utils/threads.h>
+#include <utils/KeyedVector.h>
+
+#include "SharedLibrary.h"
 
 namespace android {
 
@@ -32,7 +35,7 @@ struct Crypto : public BnCrypto {
 
     virtual status_t initCheck() const;
 
-    virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]) const;
+    virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]);
 
     virtual status_t createPlugin(
             const uint8_t uuid[16], const void *data, size_t size);
@@ -56,11 +59,17 @@ private:
     mutable Mutex mLock;
 
     status_t mInitCheck;
-    void *mLibHandle;
+    sp<SharedLibrary> mLibrary;
     CryptoFactory *mFactory;
     CryptoPlugin *mPlugin;
 
-    status_t init();
+    static KeyedVector<Vector<uint8_t>, String8> mUUIDToLibraryPathMap;
+    static KeyedVector<String8, wp<SharedLibrary> > mLibraryPathToOpenLibraryMap;
+    static Mutex mMapLock;
+
+    void findFactoryForScheme(const uint8_t uuid[16]);
+    bool loadLibraryForScheme(const String8 &path, const uint8_t uuid[16]);
+    void closeFactory();
 
     DISALLOW_EVIL_CONSTRUCTORS(Crypto);
 };