gfx/layers/ipc/VideoBridgeChild.cpp
author Bas Schouten <bschouten@mozilla.com>
Thu, 13 Dec 2018 15:59:22 +0100
changeset 509994 4c1fade7ceeb6407592d43ad0276c4b8090c3e7a
parent 505383 6f3709b3878117466168c40affa7bca0b60cf75b
child 519771 5b5e6a9942777d6faee07db57fd6b14d465b3ab3
permissions -rw-r--r--
Bug 1501442 - Part 1: Add CompositionPayload type and allow submitting it as part of a transaction. r=mstange

/* -*- 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"

namespace mozilla {
namespace layers {

StaticRefPtr<VideoBridgeChild> sVideoBridgeChildSingleton;

/* static */ void VideoBridgeChild::Startup() {
  sVideoBridgeChildSingleton = new VideoBridgeChild();
  RefPtr<VideoBridgeParent> parent = new VideoBridgeParent();

  MessageLoop* loop = CompositorThreadHolder::Loop();

  sVideoBridgeChildSingleton->Open(parent->GetIPCChannel(), loop,
                                   ipc::ChildSide);
  sVideoBridgeChildSingleton->mIPDLSelfRef = sVideoBridgeChildSingleton;
  parent->SetOtherProcessId(base::GetCurrentProcId());
}

/* static */ void VideoBridgeChild::Shutdown() {
  if (sVideoBridgeChildSingleton) {
    sVideoBridgeChildSingleton->Close();
    sVideoBridgeChildSingleton = nullptr;
  }
}

VideoBridgeChild::VideoBridgeChild()
    : mMessageLoop(MessageLoop::current()), mCanSend(true) {}

VideoBridgeChild::~VideoBridgeChild() {}

VideoBridgeChild* VideoBridgeChild::GetSingleton() {
  return sVideoBridgeChildSingleton;
}

bool VideoBridgeChild::AllocUnsafeShmem(
    size_t aSize, ipc::SharedMemory::SharedMemoryType aType,
    ipc::Shmem* aShmem) {
  return PVideoBridgeChild::AllocUnsafeShmem(aSize, aType, aShmem);
}

bool VideoBridgeChild::AllocShmem(size_t aSize,
                                  ipc::SharedMemory::SharedMemoryType aType,
                                  ipc::Shmem* aShmem) {
  MOZ_ASSERT(CanSend());
  return PVideoBridgeChild::AllocShmem(aSize, aType, aShmem);
}

bool VideoBridgeChild::DeallocShmem(ipc::Shmem& aShmem) {
  return PVideoBridgeChild::DeallocShmem(aShmem);
}

PTextureChild* VideoBridgeChild::AllocPTextureChild(const SurfaceDescriptor&,
                                                    const ReadLockDescriptor&,
                                                    const LayersBackend&,
                                                    const TextureFlags&,
                                                    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;
}

void VideoBridgeChild::DeallocPVideoBridgeChild() { mIPDLSelfRef = nullptr; }

PTextureChild* VideoBridgeChild::CreateTexture(
    const SurfaceDescriptor& aSharedData, const ReadLockDescriptor& aReadLock,
    LayersBackend aLayersBackend, TextureFlags aFlags, uint64_t aSerial,
    wr::MaybeExternalImageId& aExternalImageId, nsIEventTarget* aTarget) {
  MOZ_ASSERT(CanSend());
  return SendPTextureConstructor(aSharedData, aReadLock, aLayersBackend, aFlags,
                                 aSerial);
}

bool VideoBridgeChild::IsSameProcess() const {
  return OtherPid() == base::GetCurrentProcId();
}

}  // namespace layers
}  // namespace mozilla