1 files changed, 101 insertions, 0 deletions
diff --git a/media/gmp-clearkey/0.1/ClearKeyDecryptionManager.h b/media/gmp-clearkey/0.1/ClearKeyDecryptionManager.h
new file mode 100644
index 000000000..7a6c9a560
--- /dev/null
+++ b/media/gmp-clearkey/0.1/ClearKeyDecryptionManager.h
@@ -0,0 +1,101 @@
+/*
+ * Copyright 2015, Mozilla Foundation and contributors
+ *
+ * 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.
+ */
+
+#ifndef __ClearKeyDecryptionManager_h__
+#define __ClearKeyDecryptionManager_h__
+
+#include <map>
+
+#include "ClearKeyUtils.h"
+#include "RefCounted.h"
+
+class ClearKeyDecryptor;
+
+class CryptoMetaData {
+public:
+  CryptoMetaData() {}
+
+  explicit CryptoMetaData(const GMPEncryptedBufferMetadata* aCrypto)
+  {
+    Init(aCrypto);
+  }
+
+  void Init(const GMPEncryptedBufferMetadata* aCrypto)
+  {
+    if (!aCrypto) {
+      assert(!IsValid());
+      return;
+    }
+    Assign(mKeyId, aCrypto->KeyId(), aCrypto->KeyIdSize());
+    Assign(mIV, aCrypto->IV(), aCrypto->IVSize());
+    Assign(mClearBytes, aCrypto->ClearBytes(), aCrypto->NumSubsamples());
+    Assign(mCipherBytes, aCrypto->CipherBytes(), aCrypto->NumSubsamples());
+  }
+
+  bool IsValid() const {
+    return !mKeyId.empty() &&
+           !mIV.empty() &&
+           !mCipherBytes.empty() &&
+           !mClearBytes.empty();
+  }
+
+  size_t NumSubsamples() const {
+    assert(mClearBytes.size() == mCipherBytes.size());
+    return mClearBytes.size();
+  }
+
+  std::vector<uint8_t> mKeyId;
+  std::vector<uint8_t> mIV;
+  std::vector<uint16_t> mClearBytes;
+  std::vector<uint32_t> mCipherBytes;
+};
+
+class ClearKeyDecryptionManager : public RefCounted
+{
+private:
+  ClearKeyDecryptionManager();
+  ~ClearKeyDecryptionManager();
+
+  static ClearKeyDecryptionManager* sInstance;
+
+public:
+  static ClearKeyDecryptionManager* Get();
+
+  bool HasSeenKeyId(const KeyId& aKeyId) const;
+  bool HasKeyForKeyId(const KeyId& aKeyId) const;
+
+  const Key& GetDecryptionKey(const KeyId& aKeyId);
+
+  // Create a decryptor for the given KeyId if one does not already exist.
+  void InitKey(KeyId aKeyId, Key aKey);
+  void ExpectKeyId(KeyId aKeyId);
+  void ReleaseKeyId(KeyId aKeyId);
+
+  // Decrypts buffer *in place*.
+  GMPErr Decrypt(uint8_t* aBuffer, uint32_t aBufferSize,
+                 const CryptoMetaData& aMetadata);
+  GMPErr Decrypt(std::vector<uint8_t>& aBuffer,
+                 const CryptoMetaData& aMetadata);
+
+  void Shutdown();
+
+private:
+  bool IsExpectingKeyForKeyId(const KeyId& aKeyId) const;
+
+  std::map<KeyId, ClearKeyDecryptor*> mDecryptors;
+};
+
+#endif // __ClearKeyDecryptionManager_h__