1 files changed, 46 insertions, 0 deletions
diff --git a/dom/media/gmp/DecryptJob.cpp b/dom/media/gmp/DecryptJob.cpp
new file mode 100644
index 0000000000..affda3668f
--- /dev/null
+++ b/dom/media/gmp/DecryptJob.cpp
@@ -0,0 +1,46 @@
+/* -*- 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 "DecryptJob.h"
+#include "mozilla/Atomics.h"
+
+namespace mozilla {
+
+static Atomic<uint32_t> sDecryptJobInstanceCount(0u);
+
+DecryptJob::DecryptJob(MediaRawData* aSample)
+    : mId(++sDecryptJobInstanceCount), mSample(aSample) {}
+
+RefPtr<DecryptPromise> DecryptJob::Ensure() {
+  return mPromise.Ensure(__func__);
+}
+
+void DecryptJob::PostResult(DecryptStatus aResult) {
+  nsTArray<uint8_t> empty;
+  PostResult(aResult, empty);
+}
+
+void DecryptJob::PostResult(DecryptStatus aResult,
+                            Span<const uint8_t> aDecryptedData) {
+  if (aDecryptedData.Length() != mSample->Size()) {
+    NS_WARNING("CDM returned incorrect number of decrypted bytes");
+  }
+  if (aResult == eme::Ok) {
+    UniquePtr<MediaRawDataWriter> writer(mSample->CreateWriter());
+    PodCopy(writer->Data(), aDecryptedData.Elements(),
+            std::min<size_t>(aDecryptedData.Length(), mSample->Size()));
+  } else if (aResult == eme::NoKeyErr) {
+    NS_WARNING("CDM returned NoKeyErr");
+    // We still have the encrypted sample, so we can re-enqueue it to be
+    // decrypted again once the key is usable again.
+  } else {
+    nsAutoCString str("CDM returned decode failure DecryptStatus=");
+    str.AppendInt(aResult);
+    NS_WARNING(str.get());
+  }
+  mPromise.Resolve(DecryptResult(aResult, mSample), __func__);
+}
+
+}  // namespace mozilla