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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
#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"
#include "mozilla/webrender/RenderThread.h"
namespace mozilla::layers {
using namespace mozilla::ipc;
using namespace mozilla::gfx;
using VideoBridgeTable = EnumeratedArray<VideoBridgeSource, VideoBridgeParent*,
size_t(VideoBridgeSource::_Count)>;
static StaticDataMutex<VideoBridgeTable> sVideoBridgeFromProcess(
"VideoBridges");
static Atomic<bool> sVideoBridgeParentShutDown(false);
VideoBridgeParent::VideoBridgeParent(VideoBridgeSource aSource)
: mMonitor("VideoBridgeParent::mMonitor"),
mCompositorThreadHolder(CompositorThreadHolder::GetSingleton()),
mClosed(false) {
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 */
RefPtr<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 RefPtr{(*videoBridgeFromProcess)[aSource.value()]};
default:
MOZ_CRASH("Unhandled case");
}
}
already_AddRefed<TextureHost> VideoBridgeParent::LookupTextureAsync(
const dom::ContentParentId& aContentId, uint64_t aSerial) {
MonitorAutoLock lock(mMonitor);
// We raced shutting down the actor.
if (NS_WARN_IF(!mCompositorThreadHolder)) {
MOZ_ASSERT_UNREACHABLE("Called on destroyed VideoBridgeParent actor!");
return nullptr;
}
MOZ_ASSERT(mCompositorThreadHolder->IsInThread());
auto* actor = mTextureMap[aSerial];
if (NS_WARN_IF(!actor)) {
return nullptr;
}
if (NS_WARN_IF(aContentId != TextureHost::GetTextureContentId(actor))) {
return nullptr;
}
return do_AddRef(TextureHost::AsTextureHost(actor));
}
already_AddRefed<TextureHost> VideoBridgeParent::LookupTexture(
const dom::ContentParentId& aContentId, uint64_t aSerial) {
MonitorAutoLock lock(mMonitor);
// We raced shutting down the actor.
if (NS_WARN_IF(!mCompositorThreadHolder)) {
return nullptr;
}
auto* actor = mTextureMap[aSerial];
if (actor) {
if (NS_WARN_IF(aContentId != TextureHost::GetTextureContentId(actor))) {
return nullptr;
}
return do_AddRef(TextureHost::AsTextureHost(actor));
}
// We cannot block on the Compositor thread because that is the thread we get
// the IPC calls for the update on.
if (NS_WARN_IF(mCompositorThreadHolder->IsInThread())) {
MOZ_ASSERT_UNREACHABLE("Should never call on Compositor thread!");
return nullptr;
}
// Canvas may have raced ahead of VideoBridgeParent setting up the
// PTextureParent IPDL object. This should happen only rarely/briefly. Since
// we know that the PTexture constructor must be in the send queue, we can
// block until the IPDL ping comes back.
bool complete = false;
auto resolve = [&](void_t&&) {
MonitorAutoLock lock(mMonitor);
complete = true;
lock.NotifyAll();
};
auto reject = [&](ipc::ResponseRejectReason) {
MonitorAutoLock lock(mMonitor);
complete = true;
lock.NotifyAll();
};
mCompositorThreadHolder->Dispatch(
NS_NewRunnableFunction("VideoBridgeParent::LookupTexture", [&]() {
if (CanSend()) {
SendPing(std::move(resolve), std::move(reject));
} else {
reject(ipc::ResponseRejectReason::ChannelClosed);
}
}));
while (!complete) {
lock.Wait();
}
actor = mTextureMap[aSerial];
if (!actor) {
return nullptr;
}
if (NS_WARN_IF(aContentId != TextureHost::GetTextureContentId(actor))) {
return nullptr;
}
return do_AddRef(TextureHost::AsTextureHost(actor));
}
void VideoBridgeParent::ActorDestroy(ActorDestroyReason aWhy) {
bool shutdown = sVideoBridgeParentShutDown;
if (!shutdown && aWhy == AbnormalShutdown) {
gfxCriticalNote
<< "VideoBridgeParent receives IPC close with reason=AbnormalShutdown";
}
{
MonitorAutoLock lock(mMonitor);
// Can't alloc/dealloc shmems from now on.
mClosed = true;
mCompositorThreadHolder = nullptr;
}
}
/* static */
void VideoBridgeParent::Shutdown() {
CompositorThread()->Dispatch(NS_NewRunnableFunction(
"VideoBridgeParent::Shutdown",
[]() -> void { VideoBridgeParent::ShutdownInternal(); }));
}
/* static */
void VideoBridgeParent::ShutdownInternal() {
sVideoBridgeParentShutDown = true;
nsTArray<RefPtr<VideoBridgeParent>> bridges;
// We don't want to hold the sVideoBridgeFromProcess lock when the
// VideoBridgeParent objects are closed without holding a reference to them.
{
auto videoBridgeFromProcess = sVideoBridgeFromProcess.Lock();
for (auto& bridgeParent : *videoBridgeFromProcess) {
if (bridgeParent) {
bridges.AppendElement(bridgeParent);
}
}
}
for (auto& bridge : bridges) {
bridge->Close();
}
}
/* static */
void VideoBridgeParent::UnregisterExternalImages() {
MOZ_ASSERT(sVideoBridgeParentShutDown);
auto videoBridgeFromProcess = sVideoBridgeFromProcess.Lock();
for (auto& bridgeParent : *videoBridgeFromProcess) {
if (bridgeParent) {
bridgeParent->DoUnregisterExternalImages();
}
}
}
void VideoBridgeParent::DoUnregisterExternalImages() {
const ManagedContainer<PTextureParent>& textures = ManagedPTextureParent();
for (const auto& key : textures) {
RefPtr<TextureHost> texture = TextureHost::AsTextureHost(key);
if (texture) {
texture->MaybeDestroyRenderTexture();
}
}
}
PTextureParent* VideoBridgeParent::AllocPTextureParent(
const SurfaceDescriptor& aSharedData, ReadLockDescriptor& aReadLock,
const LayersBackend& aLayersBackend, const TextureFlags& aFlags,
const dom::ContentParentId& aContentId, const uint64_t& aSerial) {
PTextureParent* parent = TextureHost::CreateIPDLActor(
this, aSharedData, std::move(aReadLock), aLayersBackend, aFlags,
aContentId, aSerial, Nothing());
if (!parent) {
return nullptr;
}
MonitorAutoLock lock(mMonitor);
mTextureMap[aSerial] = parent;
return parent;
}
bool VideoBridgeParent::DeallocPTextureParent(PTextureParent* actor) {
MonitorAutoLock lock(mMonitor);
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) {
{
MonitorAutoLock lock(mMonitor);
if (mClosed) {
return false;
}
}
return PVideoBridgeParent::AllocShmem(aSize, aShmem);
}
bool VideoBridgeParent::AllocUnsafeShmem(size_t aSize, ipc::Shmem* aShmem) {
{
MonitorAutoLock lock(mMonitor);
if (mClosed) {
return false;
}
}
return PVideoBridgeParent::AllocUnsafeShmem(aSize, aShmem);
}
bool VideoBridgeParent::DeallocShmem(ipc::Shmem& aShmem) {
{
MonitorAutoLock lock(mMonitor);
if (mCompositorThreadHolder && !mCompositorThreadHolder->IsInThread()) {
mCompositorThreadHolder->Dispatch(NS_NewRunnableFunction(
"gfx::layers::VideoBridgeParent::DeallocShmem",
[self = RefPtr{this}, shmem = std::move(aShmem)]() mutable {
self->DeallocShmem(shmem);
}));
return true;
}
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 mozilla::layers