1 files changed, 80 insertions, 0 deletions
diff --git a/dom/media/platforms/agnostic/DummyMediaDataDecoder.cpp b/dom/media/platforms/agnostic/DummyMediaDataDecoder.cpp
new file mode 100644
index 0000000000..172c7f3dd9
--- /dev/null
+++ b/dom/media/platforms/agnostic/DummyMediaDataDecoder.cpp
@@ -0,0 +1,80 @@
+/* -*- 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/. */
+
+#include "DummyMediaDataDecoder.h"
+#include "AnnexB.h"
+#include "H264.h"
+#include "MP4Decoder.h"
+
+namespace mozilla {
+
+DummyDataCreator::~DummyDataCreator() = default;
+
+DummyMediaDataDecoder::DummyMediaDataDecoder(
+    UniquePtr<DummyDataCreator>&& aCreator, const nsACString& aDescription,
+    const CreateDecoderParams& aParams)
+    : mCreator(std::move(aCreator)),
+      mIsH264(MP4Decoder::IsH264(aParams.mConfig.mMimeType)),
+      mMaxRefFrames(mIsH264 ? H264::HasSPS(aParams.VideoConfig().mExtraData)
+                                  ? H264::ComputeMaxRefFrames(
+                                        aParams.VideoConfig().mExtraData)
+                                  : 16
+                            : 0),
+      mType(aParams.mConfig.GetType()),
+      mDescription(aDescription) {}
+
+RefPtr<MediaDataDecoder::InitPromise> DummyMediaDataDecoder::Init() {
+  return InitPromise::CreateAndResolve(mType, __func__);
+}
+
+RefPtr<ShutdownPromise> DummyMediaDataDecoder::Shutdown() {
+  return ShutdownPromise::CreateAndResolve(true, __func__);
+}
+
+RefPtr<MediaDataDecoder::DecodePromise> DummyMediaDataDecoder::Decode(
+    MediaRawData* aSample) {
+  RefPtr<MediaData> data = mCreator->Create(aSample);
+
+  if (!data) {
+    return DecodePromise::CreateAndReject(NS_ERROR_OUT_OF_MEMORY, __func__);
+  }
+
+  // Frames come out in DTS order but we need to output them in PTS order.
+  mReorderQueue.Push(std::move(data));
+
+  if (mReorderQueue.Length() > mMaxRefFrames) {
+    return DecodePromise::CreateAndResolve(DecodedData{mReorderQueue.Pop()},
+                                           __func__);
+  }
+  return DecodePromise::CreateAndResolve(DecodedData(), __func__);
+}
+
+RefPtr<MediaDataDecoder::DecodePromise> DummyMediaDataDecoder::Drain() {
+  DecodedData samples;
+  while (!mReorderQueue.IsEmpty()) {
+    samples.AppendElement(mReorderQueue.Pop());
+  }
+  return DecodePromise::CreateAndResolve(std::move(samples), __func__);
+}
+
+RefPtr<MediaDataDecoder::FlushPromise> DummyMediaDataDecoder::Flush() {
+  mReorderQueue.Clear();
+  return FlushPromise::CreateAndResolve(true, __func__);
+}
+
+nsCString DummyMediaDataDecoder::GetDescriptionName() const {
+  return "blank media data decoder"_ns;
+}
+
+nsCString DummyMediaDataDecoder::GetCodecName() const { return "unknown"_ns; }
+
+MediaDataDecoder::ConversionRequired DummyMediaDataDecoder::NeedsConversion()
+    const {
+  return mIsH264 ? ConversionRequired::kNeedAVCC
+                 : ConversionRequired::kNeedNone;
+}
+
+}  // namespace mozilla