1 files changed, 172 insertions, 0 deletions
diff --git a/gfx/layers/ipc/VideoBridgeParent.cpp b/gfx/layers/ipc/VideoBridgeParent.cpp
new file mode 100644
index 0000000000..21968a067f
--- /dev/null
+++ b/gfx/layers/ipc/VideoBridgeParent.cpp
@@ -0,0 +1,172 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "VideoBridgeParent.h"
+#include "CompositorThread.h"
+#include "mozilla/DataMutex.h"
+#include "mozilla/ipc/Endpoint.h"
+#include "mozilla/layers/TextureHost.h"
+#include "mozilla/layers/VideoBridgeUtils.h"
+
+namespace mozilla {
+namespace layers {
+
+using namespace mozilla::ipc;
+using namespace mozilla::gfx;
+
+using VideoBridgeTable =
+    EnumeratedArray<VideoBridgeSource, VideoBridgeSource::_Count,
+                    VideoBridgeParent*>;
+
+static StaticDataMutex<VideoBridgeTable> sVideoBridgeFromProcess(
+    "VideoBridges");
+
+VideoBridgeParent::VideoBridgeParent(VideoBridgeSource aSource)
+    : mCompositorThreadHolder(CompositorThreadHolder::GetSingleton()),
+      mClosed(false) {
+  mSelfRef = this;
+  auto videoBridgeFromProcess = sVideoBridgeFromProcess.Lock();
+  switch (aSource) {
+    case VideoBridgeSource::RddProcess:
+    case VideoBridgeSource::GpuProcess:
+    case VideoBridgeSource::MFMediaEngineCDMProcess:
+      (*videoBridgeFromProcess)[aSource] = this;
+      break;
+    default:
+      MOZ_CRASH("Unhandled case");
+  }
+}
+
+VideoBridgeParent::~VideoBridgeParent() {
+  auto videoBridgeFromProcess = sVideoBridgeFromProcess.Lock();
+  for (auto& bridgeParent : *videoBridgeFromProcess) {
+    if (bridgeParent == this) {
+      bridgeParent = nullptr;
+    }
+  }
+}
+
+/* static */
+void VideoBridgeParent::Open(Endpoint<PVideoBridgeParent>&& aEndpoint,
+                             VideoBridgeSource aSource) {
+  RefPtr<VideoBridgeParent> parent = new VideoBridgeParent(aSource);
+
+  CompositorThread()->Dispatch(
+      NewRunnableMethod<Endpoint<PVideoBridgeParent>&&>(
+          "gfx::layers::VideoBridgeParent::Bind", parent,
+          &VideoBridgeParent::Bind, std::move(aEndpoint)));
+}
+
+void VideoBridgeParent::Bind(Endpoint<PVideoBridgeParent>&& aEndpoint) {
+  if (!aEndpoint.Bind(this)) {
+    // We can't recover from this.
+    MOZ_CRASH("Failed to bind VideoBridgeParent to endpoint");
+  }
+}
+
+/* static */
+VideoBridgeParent* VideoBridgeParent::GetSingleton(
+    const Maybe<VideoBridgeSource>& aSource) {
+  MOZ_ASSERT(aSource.isSome());
+  auto videoBridgeFromProcess = sVideoBridgeFromProcess.Lock();
+  switch (aSource.value()) {
+    case VideoBridgeSource::RddProcess:
+    case VideoBridgeSource::GpuProcess:
+    case VideoBridgeSource::MFMediaEngineCDMProcess:
+      MOZ_ASSERT((*videoBridgeFromProcess)[aSource.value()]);
+      return (*videoBridgeFromProcess)[aSource.value()];
+    default:
+      MOZ_CRASH("Unhandled case");
+  }
+}
+
+TextureHost* VideoBridgeParent::LookupTexture(uint64_t aSerial) {
+  MOZ_DIAGNOSTIC_ASSERT(CompositorThread() &&
+                        CompositorThread()->IsOnCurrentThread());
+  return TextureHost::AsTextureHost(mTextureMap[aSerial]);
+}
+
+void VideoBridgeParent::ActorDestroy(ActorDestroyReason aWhy) {
+  // Can't alloc/dealloc shmems from now on.
+  mClosed = true;
+}
+
+/* static */
+void VideoBridgeParent::Shutdown() {
+  auto videoBridgeFromProcess = sVideoBridgeFromProcess.Lock();
+  for (auto& bridgeParent : *videoBridgeFromProcess) {
+    if (bridgeParent) {
+      bridgeParent->ReleaseCompositorThread();
+    }
+  }
+}
+
+void VideoBridgeParent::ReleaseCompositorThread() {
+  mCompositorThreadHolder = nullptr;
+}
+
+void VideoBridgeParent::ActorDealloc() {
+  mCompositorThreadHolder = nullptr;
+  ReleaseCompositorThread();
+  mSelfRef = nullptr;
+}
+
+PTextureParent* VideoBridgeParent::AllocPTextureParent(
+    const SurfaceDescriptor& aSharedData, ReadLockDescriptor& aReadLock,
+    const LayersBackend& aLayersBackend, const TextureFlags& aFlags,
+    const uint64_t& aSerial) {
+  PTextureParent* parent =
+      TextureHost::CreateIPDLActor(this, aSharedData, std::move(aReadLock),
+                                   aLayersBackend, aFlags, aSerial, Nothing());
+
+  if (!parent) {
+    return nullptr;
+  }
+
+  mTextureMap[aSerial] = parent;
+  return parent;
+}
+
+bool VideoBridgeParent::DeallocPTextureParent(PTextureParent* actor) {
+  mTextureMap.erase(TextureHost::GetTextureSerial(actor));
+  return TextureHost::DestroyIPDLActor(actor);
+}
+
+void VideoBridgeParent::SendAsyncMessage(
+    const nsTArray<AsyncParentMessageData>& aMessage) {
+  MOZ_ASSERT(false, "AsyncMessages not supported");
+}
+
+bool VideoBridgeParent::AllocShmem(size_t aSize, ipc::Shmem* aShmem) {
+  if (mClosed) {
+    return false;
+  }
+  return PVideoBridgeParent::AllocShmem(aSize, aShmem);
+}
+
+bool VideoBridgeParent::AllocUnsafeShmem(size_t aSize, ipc::Shmem* aShmem) {
+  if (mClosed) {
+    return false;
+  }
+  return PVideoBridgeParent::AllocUnsafeShmem(aSize, aShmem);
+}
+
+bool VideoBridgeParent::DeallocShmem(ipc::Shmem& aShmem) {
+  if (mClosed) {
+    return false;
+  }
+  return PVideoBridgeParent::DeallocShmem(aShmem);
+}
+
+bool VideoBridgeParent::IsSameProcess() const {
+  return OtherPid() == base::GetCurrentProcId();
+}
+
+void VideoBridgeParent::NotifyNotUsed(PTextureParent* aTexture,
+                                      uint64_t aTransactionId) {}
+
+}  // namespace layers
+}  // namespace mozilla