1 files changed, 58 insertions, 0 deletions
diff --git a/dom/media/platforms/agnostic/eme/SamplesWaitingForKey.h b/dom/media/platforms/agnostic/eme/SamplesWaitingForKey.h
new file mode 100644
index 000000000..65bb14403
--- /dev/null
+++ b/dom/media/platforms/agnostic/eme/SamplesWaitingForKey.h
@@ -0,0 +1,58 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef SamplesWaitingForKey_h_
+#define SamplesWaitingForKey_h_
+
+#include "mozilla/TaskQueue.h"
+
+#include "PlatformDecoderModule.h"
+
+namespace mozilla {
+
+typedef nsTArray<uint8_t> CencKeyId;
+
+class CDMProxy;
+
+// Encapsulates the task of waiting for the CDMProxy to have the necessary
+// keys to decrypt a given sample.
+class SamplesWaitingForKey {
+public:
+
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SamplesWaitingForKey)
+
+  explicit SamplesWaitingForKey(MediaDataDecoder* aDecoder,
+                                MediaDataDecoderCallback* aCallback,
+                                TaskQueue* aTaskQueue,
+                                CDMProxy* aProxy);
+
+  // Returns true if we need to wait for a key to become usable.
+  // Will callback MediaDataDecoder::Input(aSample) on mDecoder once the
+  // sample is ready to be decrypted. The order of input samples is
+  // preserved.
+  bool WaitIfKeyNotUsable(MediaRawData* aSample);
+
+  void NotifyUsable(const CencKeyId& aKeyId);
+
+  void Flush();
+
+  void BreakCycles();
+
+protected:
+  ~SamplesWaitingForKey();
+
+private:
+  Mutex mMutex;
+  RefPtr<MediaDataDecoder> mDecoder;
+  MediaDataDecoderCallback* mDecoderCallback;
+  RefPtr<TaskQueue> mTaskQueue;
+  RefPtr<CDMProxy> mProxy;
+  nsTArray<RefPtr<MediaRawData>> mSamples;
+};
+
+} // namespace mozilla
+
+#endif //  SamplesWaitingForKey_h_