1 files changed, 75 insertions, 0 deletions
diff --git a/dom/media/gmp/GMPMemoryStorage.cpp b/dom/media/gmp/GMPMemoryStorage.cpp
new file mode 100644
index 0000000000..fe8cfee5f8
--- /dev/null
+++ b/dom/media/gmp/GMPMemoryStorage.cpp
@@ -0,0 +1,75 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+#include "GMPStorage.h"
+#include "nsClassHashtable.h"
+
+namespace mozilla::gmp {
+
+class GMPMemoryStorage : public GMPStorage {
+ public:
+  GMPErr Open(const nsACString& aRecordName) override {
+    MOZ_ASSERT(!IsOpen(aRecordName));
+
+    Record* record = mRecords.GetOrInsertNew(aRecordName);
+    record->mIsOpen = true;
+    return GMPNoErr;
+  }
+
+  bool IsOpen(const nsACString& aRecordName) const override {
+    const Record* record = mRecords.Get(aRecordName);
+    if (!record) {
+      return false;
+    }
+    return record->mIsOpen;
+  }
+
+  GMPErr Read(const nsACString& aRecordName,
+              nsTArray<uint8_t>& aOutBytes) override {
+    const Record* record = mRecords.Get(aRecordName);
+    if (!record) {
+      return GMPGenericErr;
+    }
+    aOutBytes = record->mData.Clone();
+    return GMPNoErr;
+  }
+
+  GMPErr Write(const nsACString& aRecordName,
+               const nsTArray<uint8_t>& aBytes) override {
+    Record* record = nullptr;
+    if (!mRecords.Get(aRecordName, &record)) {
+      return GMPClosedErr;
+    }
+    record->mData = aBytes.Clone();
+    return GMPNoErr;
+  }
+
+  void Close(const nsACString& aRecordName) override {
+    Record* record = nullptr;
+    if (!mRecords.Get(aRecordName, &record)) {
+      return;
+    }
+    if (!record->mData.Length()) {
+      // Record is empty, delete.
+      mRecords.Remove(aRecordName);
+    } else {
+      record->mIsOpen = false;
+    }
+  }
+
+ private:
+  struct Record {
+    nsTArray<uint8_t> mData;
+    bool mIsOpen = false;
+  };
+
+  nsClassHashtable<nsCStringHashKey, Record> mRecords;
+};
+
+already_AddRefed<GMPStorage> CreateGMPMemoryStorage() {
+  return RefPtr<GMPStorage>(new GMPMemoryStorage()).forget();
+}
+
+}  // namespace mozilla::gmp