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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 https://mozilla.org/MPL/2.0/. */
#include "GraphRunner.h"
#include "GraphDriver.h"
#include "MediaTrackGraph.h"
#include "MediaTrackGraphImpl.h"
#include "nsISupportsImpl.h"
#include "nsISupportsPriority.h"
#include "prthread.h"
#include "Tracing.h"
#include "audio_thread_priority.h"
namespace mozilla {
GraphRunner::GraphRunner(MediaTrackGraphImpl* aGraph,
already_AddRefed<nsIThread> aThread)
: Runnable("GraphRunner"),
mMonitor("GraphRunner::mMonitor"),
mGraph(aGraph),
mThreadState(ThreadState::Wait),
mThread(aThread) {
mThread->Dispatch(do_AddRef(this));
}
GraphRunner::~GraphRunner() {
MOZ_ASSERT(mThreadState == ThreadState::Shutdown);
}
/* static */
already_AddRefed<GraphRunner> GraphRunner::Create(MediaTrackGraphImpl* aGraph) {
nsCOMPtr<nsIThread> thread;
if (NS_WARN_IF(NS_FAILED(
NS_NewNamedThread("GraphRunner", getter_AddRefs(thread))))) {
return nullptr;
}
nsCOMPtr<nsISupportsPriority> supportsPriority = do_QueryInterface(thread);
MOZ_ASSERT(supportsPriority);
MOZ_ALWAYS_SUCCEEDS(
supportsPriority->SetPriority(nsISupportsPriority::PRIORITY_HIGHEST));
return do_AddRef(new GraphRunner(aGraph, thread.forget()));
}
void GraphRunner::Shutdown() {
{
MonitorAutoLock lock(mMonitor);
MOZ_ASSERT(mThreadState == ThreadState::Wait);
mThreadState = ThreadState::Shutdown;
mMonitor.Notify();
}
mThread->Shutdown();
}
auto GraphRunner::OneIteration(GraphTime aStateTime, GraphTime aIterationEnd,
AudioMixer* aMixer) -> IterationResult {
TRACE();
MonitorAutoLock lock(mMonitor);
MOZ_ASSERT(mThreadState == ThreadState::Wait);
mIterationState = Some(IterationState(aStateTime, aIterationEnd, aMixer));
#ifdef DEBUG
if (auto audioDriver = mGraph->CurrentDriver()->AsAudioCallbackDriver()) {
mAudioDriverThreadId = audioDriver->ThreadId();
} else if (auto clockDriver =
mGraph->CurrentDriver()->AsSystemClockDriver()) {
mClockDriverThread = clockDriver->Thread();
} else {
MOZ_CRASH("Unknown GraphDriver");
}
#endif
// Signal that mIterationState was updated
mThreadState = ThreadState::Run;
mMonitor.Notify();
// Wait for mIterationResult to update
do {
mMonitor.Wait();
} while (mThreadState == ThreadState::Run);
#ifdef DEBUG
mAudioDriverThreadId = std::thread::id();
mClockDriverThread = nullptr;
#endif
mIterationState = Nothing();
IterationResult result = std::move(mIterationResult);
mIterationResult = IterationResult();
return result;
}
NS_IMETHODIMP GraphRunner::Run() {
#ifndef XP_LINUX
atp_handle* handle =
atp_promote_current_thread_to_real_time(0, mGraph->GraphRate());
#endif
nsCOMPtr<nsIThreadInternal> threadInternal = do_QueryInterface(mThread);
threadInternal->SetObserver(mGraph);
MonitorAutoLock lock(mMonitor);
while (true) {
while (mThreadState == ThreadState::Wait) {
mMonitor.Wait(); // Wait for mIterationState to update or for shutdown
}
if (mThreadState == ThreadState::Shutdown) {
break;
}
MOZ_DIAGNOSTIC_ASSERT(mIterationState.isSome());
TRACE();
mIterationResult = mGraph->OneIterationImpl(mIterationState->StateTime(),
mIterationState->IterationEnd(),
mIterationState->Mixer());
// Signal that mIterationResult was updated
mThreadState = ThreadState::Wait;
mMonitor.Notify();
}
#ifndef XP_LINUX
if (handle) {
atp_demote_current_thread_from_real_time(handle);
}
#endif
return NS_OK;
}
bool GraphRunner::OnThread() const {
return mThread->EventTarget()->IsOnCurrentThread();
}
#ifdef DEBUG
bool GraphRunner::InDriverIteration(const GraphDriver* aDriver) const {
if (!OnThread()) {
return false;
}
if (auto audioDriver = aDriver->AsAudioCallbackDriver()) {
return audioDriver->ThreadId() == mAudioDriverThreadId;
}
if (auto clockDriver = aDriver->AsSystemClockDriver()) {
return clockDriver->Thread() == mClockDriverThread;
}
MOZ_CRASH("Unknown driver");
}
#endif
} // namespace mozilla
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