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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromecast/renderer/cast_content_renderer_client.h"
#include <sys/sysinfo.h>
#include "base/command_line.h"
#include "base/memory/memory_pressure_listener.h"
#include "chromecast/common/chromecast_switches.h"
#include "chromecast/renderer/cast_media_load_deferrer.h"
#include "chromecast/renderer/cast_render_process_observer.h"
#include "chromecast/renderer/key_systems_cast.h"
#include "chromecast/renderer/media/cma_media_renderer_factory.h"
#include "components/network_hints/renderer/prescient_networking_dispatcher.h"
#include "content/public/common/content_switches.h"
#include "content/public/renderer/render_frame.h"
#include "content/public/renderer/render_view.h"
#include "content/public/renderer/render_view_observer.h"
#include "crypto/nss_util.h"
#include "third_party/WebKit/public/platform/WebColor.h"
#include "third_party/WebKit/public/web/WebSettings.h"
#include "third_party/WebKit/public/web/WebView.h"
namespace chromecast {
namespace shell {
namespace {
#if defined(ARCH_CPU_ARM_FAMILY) && !defined(OS_ANDROID)
// This memory threshold is set for Chromecast. See the UMA histogram
// Platform.MeminfoMemFree when tuning.
// TODO(gunsch): These should be platform/product-dependent. Look into a way
// to move these to platform-specific repositories.
const int kCriticalMinFreeMemMB = 24;
const int kPollingIntervalMS = 5000;
void PlatformPollFreemem(void) {
struct sysinfo sys;
if (sysinfo(&sys) == -1) {
LOG(ERROR) << "platform_poll_freemem(): sysinfo failed";
} else {
int free_mem_mb = static_cast<int64_t>(sys.freeram) *
sys.mem_unit / (1024 * 1024);
if (free_mem_mb <= kCriticalMinFreeMemMB) {
// Memory is getting really low, we need to do whatever we can to
// prevent deadlocks and interfering with other processes.
base::MemoryPressureListener::NotifyMemoryPressure(
base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL);
}
}
// Setup next poll.
base::MessageLoopProxy::current()->PostDelayedTask(
FROM_HERE,
base::Bind(&PlatformPollFreemem),
base::TimeDelta::FromMilliseconds(kPollingIntervalMS));
}
#endif
// Default background color to set for WebViews. WebColor is in ARGB format
// though the comment of WebColor says it is in RGBA.
const blink::WebColor kColorBlack = 0xFF000000;
class CastRenderViewObserver : content::RenderViewObserver {
public:
explicit CastRenderViewObserver(content::RenderView* render_view);
~CastRenderViewObserver() override {}
void DidClearWindowObject(blink::WebLocalFrame* frame) override;
};
CastRenderViewObserver::CastRenderViewObserver(content::RenderView* render_view)
: content::RenderViewObserver(render_view) {
}
void CastRenderViewObserver::DidClearWindowObject(blink::WebLocalFrame* frame) {
PlatformAddRendererNativeBindings(frame);
}
} // namespace
CastContentRendererClient::CastContentRendererClient() {
}
CastContentRendererClient::~CastContentRendererClient() {
}
void CastContentRendererClient::RenderThreadStarted() {
#if defined(USE_NSS)
// Note: Copied from chrome_render_process_observer.cc to fix b/8676652.
//
// On platforms where the system NSS shared libraries are used,
// initialize NSS now because it won't be able to load the .so's
// after entering the sandbox.
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
if (!command_line->HasSwitch(switches::kSingleProcess))
crypto::InitNSSSafely();
#endif
#if defined(ARCH_CPU_ARM_FAMILY) && !defined(OS_ANDROID)
PlatformPollFreemem();
#endif
cast_observer_.reset(new CastRenderProcessObserver());
prescient_networking_dispatcher_.reset(
new network_hints::PrescientNetworkingDispatcher());
}
void CastContentRendererClient::RenderViewCreated(
content::RenderView* render_view) {
blink::WebView* webview = render_view->GetWebView();
if (webview) {
webview->setBaseBackgroundColor(kColorBlack);
// The following settings express consistent behaviors across Cast
// embedders, though Android has enabled by default for mobile browsers.
webview->settings()->setShrinksViewportContentToFit(false);
webview->settings()->setMediaControlsOverlayPlayButtonEnabled(false);
// Disable application cache as Chromecast doesn't support off-line
// application running.
webview->settings()->setOfflineWebApplicationCacheEnabled(false);
}
// Note: RenderView will own the lifetime of its observer.
new CastRenderViewObserver(render_view);
}
void CastContentRendererClient::AddKeySystems(
std::vector< ::media::KeySystemInfo>* key_systems) {
AddChromecastKeySystems(key_systems);
AddChromecastPlatformKeySystems(key_systems);
}
#if !defined(OS_ANDROID)
scoped_ptr<::media::RendererFactory>
CastContentRendererClient::CreateMediaRendererFactory(
::content::RenderFrame* render_frame) {
const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
if (!cmd_line->HasSwitch(switches::kEnableCmaMediaPipeline))
return nullptr;
return scoped_ptr<::media::RendererFactory>(
new chromecast::media::CmaMediaRendererFactory(
render_frame->GetRoutingID()));
}
#endif
blink::WebPrescientNetworking*
CastContentRendererClient::GetPrescientNetworking() {
return prescient_networking_dispatcher_.get();
}
void CastContentRendererClient::DeferMediaLoad(
content::RenderFrame* render_frame,
const base::Closure& closure) {
if (!render_frame->IsHidden()) {
closure.Run();
return;
}
// Lifetime is tied to |render_frame| via content::RenderFrameObserver.
new CastMediaLoadDeferrer(render_frame, closure);
}
} // namespace shell
} // namespace chromecast
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