Remove dependency to libmediadrm from drm HAL
drm HAL has been using libmediadrm for android::SharedLibrary class and
android::PluginLoader class. This is a Treble violation since
libmediadrm is a framework-only library that is not available to
vendors.
To solve the problem, the two classes are copied into this directory
to form a small static library android.hardware.drm@1.0-helper.a.
Bug: 38302533
Test: mm under /hardware/interfaces/drm/1.0/default and
/hardware/interfaces/drm/1.0/vts/functional
Change-Id: I7b4e5cdb3bc815e971e0c3b7ec99ea86042e13eb
diff --git a/drm/1.0/default/SharedLibrary.cpp b/drm/1.0/default/SharedLibrary.cpp
new file mode 100644
index 0000000..0a942cd
--- /dev/null
+++ b/drm/1.0/default/SharedLibrary.cpp
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+#include "SharedLibrary.h"
+
+#include <dlfcn.h>
+
+namespace android {
+namespace hardware {
+namespace drm {
+namespace V1_0 {
+namespace helper {
+
+SharedLibrary::SharedLibrary(const String8& path) {
+ mLibHandle = dlopen(path.string(), RTLD_NOW);
+}
+
+SharedLibrary::~SharedLibrary() {
+ if (mLibHandle != NULL) {
+ dlclose(mLibHandle);
+ mLibHandle = NULL;
+ }
+}
+
+bool SharedLibrary::operator!() const {
+ return mLibHandle == NULL;
+}
+
+void* SharedLibrary::lookup(const char* symbol) const {
+ if (!mLibHandle) {
+ return NULL;
+ }
+
+ // Clear last error before we load the symbol again,
+ // in case the caller didn't retrieve it.
+ (void)dlerror();
+ return dlsym(mLibHandle, symbol);
+}
+
+const char* SharedLibrary::lastError() const {
+ const char* error = dlerror();
+ return error ? error : "No errors or unknown error";
+}
+
+}
+}
+}
+}
+} // namespace android