Enable loading of treble-based plugins

Test: gtests passing

bug: 34507158
Change-Id: I712dea8e211e83b36cb103d913405521d55123f5
diff --git a/drm/1.0/default/CryptoFactory.cpp b/drm/1.0/default/CryptoFactory.cpp
index 02084e7..37471ba 100644
--- a/drm/1.0/default/CryptoFactory.cpp
+++ b/drm/1.0/default/CryptoFactory.cpp
@@ -14,10 +14,11 @@
  * limitations under the License.
  */
 
+#include <utils/Log.h>
+
 #include "CryptoFactory.h"
 #include "CryptoPlugin.h"
 #include "TypeConvert.h"
-#include <utils/Log.h>
 
 namespace android {
 namespace hardware {
@@ -25,45 +26,63 @@
 namespace V1_0 {
 namespace implementation {
 
-    CryptoFactory::CryptoFactory() :
-        loader("/vendor/lib/mediadrm", "createCryptoFactory") {
-    }
+CryptoFactory::CryptoFactory() :
+    trebleLoader("/vendor/lib/hw", "createCryptoFactory"),
+    legacyLoader("/vendor/lib/mediadrm", "createCryptoFactory") {
+}
 
-    // Methods from ::android::hardware::drm::V1_0::ICryptoFactory follow.
-    Return<bool> CryptoFactory::isCryptoSchemeSupported(
-            const hidl_array<uint8_t, 16>& uuid) {
-        for (size_t i = 0; i < loader.factoryCount(); i++) {
-            if (loader.getFactory(i)->isCryptoSchemeSupported(uuid.data())) {
-                return true;
-            }
-        }
-        return false;
-    }
+// Methods from ::android::hardware::drm::V1_0::ICryptoFactory follow.
+Return<bool> CryptoFactory::isCryptoSchemeSupported(
+        const hidl_array<uint8_t, 16>& uuid) {
+    return isCryptoSchemeSupported(trebleLoader, uuid) ||
+            isCryptoSchemeSupported(legacyLoader, uuid);
+}
 
-    Return<void> CryptoFactory::createPlugin(const hidl_array<uint8_t, 16>& uuid,
-            const hidl_vec<uint8_t>& initData, createPlugin_cb _hidl_cb) {
-        for (size_t i = 0; i < loader.factoryCount(); i++) {
-            if (loader.getFactory(i)->isCryptoSchemeSupported(uuid.data())) {
-                android::CryptoPlugin *legacyPlugin = NULL;
-                status_t status = loader.getFactory(i)->createPlugin(uuid.data(),
-                        initData.data(), initData.size(), &legacyPlugin);
-                CryptoPlugin *newPlugin = NULL;
-                if (legacyPlugin == NULL) {
-                    ALOGE("Crypto legacy HAL: failed to create crypto plugin");
-                } else {
-                    newPlugin = new CryptoPlugin(legacyPlugin);
+Return<void> CryptoFactory::createPlugin(const hidl_array<uint8_t, 16>& uuid,
+        const hidl_vec<uint8_t>& initData, createPlugin_cb _hidl_cb) {
+    sp<ICryptoPlugin> plugin = createTreblePlugin(uuid, initData);
+    if (plugin == nullptr) {
+        plugin = createLegacyPlugin(uuid, initData);
+    }
+    _hidl_cb(plugin != nullptr ? Status::OK : Status::ERROR_DRM_CANNOT_HANDLE, plugin);
+    return Void();
+}
+
+sp<ICryptoPlugin> CryptoFactory::createTreblePlugin(const hidl_array<uint8_t, 16>& uuid,
+        const hidl_vec<uint8_t>& initData) {
+    sp<ICryptoPlugin> plugin;
+    for (size_t i = 0; i < trebleLoader.factoryCount(); i++) {
+        Return<void> hResult = trebleLoader.getFactory(i)->createPlugin(uuid, initData,
+                [&](Status status, const sp<ICryptoPlugin>& hPlugin) {
+                    if (status == Status::OK) {
+                        plugin = hPlugin;
+                    }
                 }
-                _hidl_cb(toStatus(status), newPlugin);
-                return Void();
-            }
+            );
+        if (plugin != nullptr) {
+            return plugin;
         }
-        _hidl_cb(Status::ERROR_DRM_CANNOT_HANDLE, NULL);
-        return Void();
     }
+    return nullptr;
+}
 
-    ICryptoFactory* HIDL_FETCH_ICryptoFactory(const char* /* name */) {
-        return new CryptoFactory();
+sp<ICryptoPlugin> CryptoFactory::createLegacyPlugin(const hidl_array<uint8_t, 16>& uuid,
+        const hidl_vec<uint8_t>& initData) {
+    android::CryptoPlugin *legacyPlugin = nullptr;
+    for (size_t i = 0; i < legacyLoader.factoryCount(); i++) {
+        legacyLoader.getFactory(i)->createPlugin(uuid.data(),
+                initData.data(), initData.size(), &legacyPlugin);
+        if (legacyPlugin) {
+            return new CryptoPlugin(legacyPlugin);
+        }
     }
+    return nullptr;
+}
+
+
+ICryptoFactory* HIDL_FETCH_ICryptoFactory(const char* /* name */) {
+    return new CryptoFactory();
+}
 
 }  // namespace implementation
 }  // namespace V1_0