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-rw-r--r--gfx/layers/ipc/VideoBridgeChild.cpp188
1 files changed, 188 insertions, 0 deletions
diff --git a/gfx/layers/ipc/VideoBridgeChild.cpp b/gfx/layers/ipc/VideoBridgeChild.cpp
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+++ b/gfx/layers/ipc/VideoBridgeChild.cpp
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+/* -*- 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 "VideoBridgeChild.h"
+#include "VideoBridgeParent.h"
+#include "CompositorThread.h"
+#include "mozilla/dom/ContentChild.h"
+#include "mozilla/ipc/Endpoint.h"
+#include "mozilla/StaticMutex.h"
+#include "transport/runnable_utils.h"
+#include "SynchronousTask.h"
+
+namespace mozilla {
+namespace layers {
+
+// Singleton
+static StaticMutex sVideoBridgeLock MOZ_UNANNOTATED;
+StaticRefPtr<VideoBridgeChild> sVideoBridge;
+
+/* static */
+void VideoBridgeChild::StartupForGPUProcess() {
+ ipc::Endpoint<PVideoBridgeParent> parentPipe;
+ ipc::Endpoint<PVideoBridgeChild> childPipe;
+
+ PVideoBridge::CreateEndpoints(base::GetCurrentProcId(),
+ base::GetCurrentProcId(), &parentPipe,
+ &childPipe);
+
+ VideoBridgeChild::Open(std::move(childPipe));
+ VideoBridgeParent::Open(std::move(parentPipe), VideoBridgeSource::GpuProcess);
+}
+
+/* static */
+void VideoBridgeChild::Open(Endpoint<PVideoBridgeChild>&& aEndpoint) {
+ StaticMutexAutoLock lock(sVideoBridgeLock);
+ MOZ_ASSERT(!sVideoBridge || !sVideoBridge->CanSend());
+ sVideoBridge = new VideoBridgeChild();
+
+ if (!aEndpoint.Bind(sVideoBridge)) {
+ // We can't recover from this.
+ MOZ_CRASH("Failed to bind VideoBridgeChild to endpoint");
+ }
+}
+
+/* static */
+void VideoBridgeChild::Shutdown() {
+ StaticMutexAutoLock lock(sVideoBridgeLock);
+ if (sVideoBridge) {
+ sVideoBridge->Close();
+ sVideoBridge = nullptr;
+ }
+}
+
+VideoBridgeChild::VideoBridgeChild()
+ : mThread(GetCurrentSerialEventTarget()), mCanSend(true) {}
+
+VideoBridgeChild::~VideoBridgeChild() = default;
+
+VideoBridgeChild* VideoBridgeChild::GetSingleton() {
+ StaticMutexAutoLock lock(sVideoBridgeLock);
+ return sVideoBridge;
+}
+
+bool VideoBridgeChild::AllocUnsafeShmem(size_t aSize, ipc::Shmem* aShmem) {
+ if (!mThread->IsOnCurrentThread()) {
+ return DispatchAllocShmemInternal(aSize, aShmem, true); // true: unsafe
+ }
+
+ if (!CanSend()) {
+ return false;
+ }
+
+ return PVideoBridgeChild::AllocUnsafeShmem(aSize, aShmem);
+}
+
+bool VideoBridgeChild::AllocShmem(size_t aSize, ipc::Shmem* aShmem) {
+ MOZ_ASSERT(CanSend());
+ return PVideoBridgeChild::AllocShmem(aSize, aShmem);
+}
+
+void VideoBridgeChild::ProxyAllocShmemNow(SynchronousTask* aTask, size_t aSize,
+ ipc::Shmem* aShmem, bool aUnsafe,
+ bool* aSuccess) {
+ AutoCompleteTask complete(aTask);
+
+ if (!CanSend()) {
+ return;
+ }
+
+ bool ok = false;
+ if (aUnsafe) {
+ ok = AllocUnsafeShmem(aSize, aShmem);
+ } else {
+ ok = AllocShmem(aSize, aShmem);
+ }
+ *aSuccess = ok;
+}
+
+bool VideoBridgeChild::DispatchAllocShmemInternal(size_t aSize,
+ ipc::Shmem* aShmem,
+ bool aUnsafe) {
+ SynchronousTask task("AllocatorProxy alloc");
+
+ bool success = false;
+ RefPtr<Runnable> runnable = WrapRunnable(
+ RefPtr<VideoBridgeChild>(this), &VideoBridgeChild::ProxyAllocShmemNow,
+ &task, aSize, aShmem, aUnsafe, &success);
+ GetThread()->Dispatch(runnable.forget());
+
+ task.Wait();
+
+ return success;
+}
+
+void VideoBridgeChild::ProxyDeallocShmemNow(SynchronousTask* aTask,
+ ipc::Shmem* aShmem, bool* aResult) {
+ AutoCompleteTask complete(aTask);
+
+ if (!CanSend()) {
+ return;
+ }
+ *aResult = DeallocShmem(*aShmem);
+}
+
+bool VideoBridgeChild::DeallocShmem(ipc::Shmem& aShmem) {
+ if (GetThread()->IsOnCurrentThread()) {
+ if (!CanSend()) {
+ return false;
+ }
+ return PVideoBridgeChild::DeallocShmem(aShmem);
+ }
+
+ SynchronousTask task("AllocatorProxy Dealloc");
+ bool result = false;
+
+ RefPtr<Runnable> runnable = WrapRunnable(
+ RefPtr<VideoBridgeChild>(this), &VideoBridgeChild::ProxyDeallocShmemNow,
+ &task, &aShmem, &result);
+ GetThread()->Dispatch(runnable.forget());
+
+ task.Wait();
+ return result;
+}
+
+PTextureChild* VideoBridgeChild::AllocPTextureChild(
+ const SurfaceDescriptor&, ReadLockDescriptor&, const LayersBackend&,
+ const TextureFlags&, const dom::ContentParentId& aContentId,
+ const uint64_t& aSerial) {
+ MOZ_ASSERT(CanSend());
+ return TextureClient::CreateIPDLActor();
+}
+
+bool VideoBridgeChild::DeallocPTextureChild(PTextureChild* actor) {
+ return TextureClient::DestroyIPDLActor(actor);
+}
+
+void VideoBridgeChild::ActorDestroy(ActorDestroyReason aWhy) {
+ mCanSend = false;
+}
+
+PTextureChild* VideoBridgeChild::CreateTexture(
+ const SurfaceDescriptor& aSharedData, ReadLockDescriptor&& aReadLock,
+ LayersBackend aLayersBackend, TextureFlags aFlags,
+ const dom::ContentParentId& aContentId, uint64_t aSerial,
+ wr::MaybeExternalImageId& aExternalImageId) {
+ MOZ_ASSERT(CanSend());
+ return SendPTextureConstructor(aSharedData, std::move(aReadLock),
+ aLayersBackend, aFlags, aContentId, aSerial);
+}
+
+bool VideoBridgeChild::IsSameProcess() const {
+ return OtherPid() == base::GetCurrentProcId();
+}
+
+void VideoBridgeChild::HandleFatalError(const char* aMsg) {
+ dom::ContentChild::FatalErrorIfNotUsingGPUProcess(aMsg, OtherPid());
+}
+
+mozilla::ipc::IPCResult VideoBridgeChild::RecvPing(PingResolver&& aResolver) {
+ aResolver(void_t{});
+ return IPC_OK();
+}
+
+} // namespace layers
+} // namespace mozilla