chromecast/renderer/cast_content_renderer_client.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chromecast/renderer/cast_content_renderer_client.h"
   6
   7 #include <sys/sysinfo.h>
   8
   9 #include "base/command_line.h"
  10 #include "base/memory/memory_pressure_listener.h"
  11 #include "base/strings/string_number_conversions.h"
  12 #include "base/thread_task_runner_handle.h"
  13 #include "chromecast/base/chromecast_switches.h"
  14 #include "chromecast/crash/cast_crash_keys.h"
  15 #include "chromecast/media/base/media_caps.h"
  16 #include "chromecast/renderer/cast_media_load_deferrer.h"
  17 #include "chromecast/renderer/cast_render_process_observer.h"
  18 #include "chromecast/renderer/key_systems_cast.h"
  19 #include "chromecast/renderer/media/chromecast_media_renderer_factory.h"
  20 #include "components/network_hints/renderer/prescient_networking_dispatcher.h"
  21 #include "content/public/common/content_switches.h"
  22 #include "content/public/renderer/render_frame.h"
  23 #include "content/public/renderer/render_view.h"
  24 #include "content/public/renderer/render_view_observer.h"
  25 #include "crypto/nss_util.h"
  26 #include "ipc/message_filter.h"
  27 #include "third_party/WebKit/public/platform/WebColor.h"
  28 #include "third_party/WebKit/public/web/WebSettings.h"
  29 #include "third_party/WebKit/public/web/WebView.h"
  30
  31 namespace chromecast {
  32 namespace shell {
  33
  34 namespace {
  35
  36 #if defined(ARCH_CPU_ARM_FAMILY) && !defined(OS_ANDROID)
  37 // This memory threshold is set for Chromecast. See the UMA histogram
  38 // Platform.MeminfoMemFree when tuning.
  39 // TODO(gunsch): These should be platform/product-dependent. Look into a way
  40 // to move these to platform-specific repositories.
  41 const int kCriticalMinFreeMemMB = 24;
  42 const int kPollingIntervalMS = 5000;
  43
  44 void PlatformPollFreemem(void) {
  45   struct sysinfo sys;
  46
  47   if (sysinfo(&sys) == -1) {
  48     LOG(ERROR) << "platform_poll_freemem(): sysinfo failed";
  49   } else {
  50     int free_mem_mb = static_cast<int64_t>(sys.freeram) *
  51         sys.mem_unit / (1024 * 1024);
  52
  53     if (free_mem_mb <= kCriticalMinFreeMemMB) {
  54       // Memory is getting really low, we need to do whatever we can to
  55       // prevent deadlocks and interfering with other processes.
  56       base::MemoryPressureListener::NotifyMemoryPressure(
  57           base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL);
  58     }
  59   }
  60
  61   // Setup next poll.
  62   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
  63       FROM_HERE, base::Bind(&PlatformPollFreemem),
  64       base::TimeDelta::FromMilliseconds(kPollingIntervalMS));
  65 }
  66 #endif
  67
  68 // Default background color to set for WebViews. WebColor is in ARGB format
  69 // though the comment of WebColor says it is in RGBA.
  70 const blink::WebColor kColorBlack = 0xFF000000;
  71
  72 class CastRenderViewObserver : content::RenderViewObserver {
  73  public:
  74   explicit CastRenderViewObserver(content::RenderView* render_view);
  75   ~CastRenderViewObserver() override {}
  76
  77   void DidClearWindowObject(blink::WebLocalFrame* frame) override;
  78 };
  79
  80 CastRenderViewObserver::CastRenderViewObserver(content::RenderView* render_view)
  81     : content::RenderViewObserver(render_view) {
  82 }
  83
  84 void CastRenderViewObserver::DidClearWindowObject(blink::WebLocalFrame* frame) {
  85   PlatformAddRendererNativeBindings(frame);
  86 }
  87
  88 }  // namespace
  89
  90 CastContentRendererClient::CastContentRendererClient() {
  91 }
  92
  93 CastContentRendererClient::~CastContentRendererClient() {
  94 }
  95
  96 void CastContentRendererClient::RenderThreadStarted() {
  97   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
  98 #if defined(USE_NSS_CERTS)
  99   // Note: Copied from chrome_render_process_observer.cc to fix b/8676652.
 100   //
 101   // On platforms where the system NSS shared libraries are used,
 102   // initialize NSS now because it won't be able to load the .so's
 103   // after entering the sandbox.
 104   if (!command_line->HasSwitch(switches::kSingleProcess))
 105     crypto::InitNSSSafely();
 106 #endif
 107
 108 #if defined(ARCH_CPU_ARM_FAMILY) && !defined(OS_ANDROID)
 109   PlatformPollFreemem();
 110 #endif
 111
 112   // Set the initial known codecs mask.
 113   if (command_line->HasSwitch(switches::kHdmiSinkSupportedCodecs)) {
 114     int hdmi_codecs_mask;
 115     if (base::StringToInt(command_line->GetSwitchValueASCII(
 116                               switches::kHdmiSinkSupportedCodecs),
 117                           &hdmi_codecs_mask)) {
 118       ::media::SetHdmiSinkCodecs(hdmi_codecs_mask);
 119     }
 120   }
 121
 122   cast_observer_.reset(
 123       new CastRenderProcessObserver(PlatformGetRendererMessageFilters()));
 124
 125   prescient_networking_dispatcher_.reset(
 126       new network_hints::PrescientNetworkingDispatcher());
 127
 128   std::string last_launched_app =
 129       command_line->GetSwitchValueNative(switches::kLastLaunchedApp);
 130   if (!last_launched_app.empty())
 131     base::debug::SetCrashKeyValue(crash_keys::kLastApp, last_launched_app);
 132
 133   std::string previous_app =
 134       command_line->GetSwitchValueNative(switches::kPreviousApp);
 135   if (!previous_app.empty())
 136     base::debug::SetCrashKeyValue(crash_keys::kPreviousApp, previous_app);
 137 }
 138
 139 void CastContentRendererClient::RenderViewCreated(
 140     content::RenderView* render_view) {
 141   blink::WebView* webview = render_view->GetWebView();
 142   if (webview) {
 143     webview->setBaseBackgroundColor(kColorBlack);
 144
 145     // The following settings express consistent behaviors across Cast
 146     // embedders, though Android has enabled by default for mobile browsers.
 147     webview->settings()->setShrinksViewportContentToFit(false);
 148     webview->settings()->setMediaControlsOverlayPlayButtonEnabled(false);
 149
 150     // Scale 1 ensures window.innerHeight/Width match application resolution.
 151     // PageScaleOverride is the 'user agent' value which overrides page
 152     // settings (from meta viewport tag) - thus preventing inconsistency
 153     // between Android and non-Android cast_shell.
 154     webview->setDefaultPageScaleLimits(1.f, 1.f);
 155     webview->setInitialPageScaleOverride(1.f);
 156
 157     // Disable application cache as Chromecast doesn't support off-line
 158     // application running.
 159     webview->settings()->setOfflineWebApplicationCacheEnabled(false);
 160   }
 161
 162   // Note: RenderView will own the lifetime of its observer.
 163   new CastRenderViewObserver(render_view);
 164 }
 165
 166 void CastContentRendererClient::AddKeySystems(
 167     std::vector< ::media::KeySystemInfo>* key_systems) {
 168   AddChromecastKeySystems(key_systems);
 169   AddChromecastPlatformKeySystems(key_systems);
 170 }
 171
 172 #if !defined(OS_ANDROID)
 173 scoped_ptr<::media::RendererFactory>
 174 CastContentRendererClient::CreateMediaRendererFactory(
 175     ::content::RenderFrame* render_frame,
 176     const scoped_refptr<::media::MediaLog>& media_log) {
 177   const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
 178   if (!cmd_line->HasSwitch(switches::kEnableCmaMediaPipeline))
 179     return nullptr;
 180
 181   return scoped_ptr<::media::RendererFactory>(
 182       new chromecast::media::ChromecastMediaRendererFactory(
 183           media_log, render_frame->GetRoutingID()));
 184 }
 185 #endif
 186
 187 blink::WebPrescientNetworking*
 188 CastContentRendererClient::GetPrescientNetworking() {
 189   return prescient_networking_dispatcher_.get();
 190 }
 191
 192 void CastContentRendererClient::DeferMediaLoad(
 193     content::RenderFrame* render_frame,
 194     const base::Closure& closure) {
 195   if (!render_frame->IsHidden()) {
 196     closure.Run();
 197     return;
 198   }
 199
 200   // Lifetime is tied to |render_frame| via content::RenderFrameObserver.
 201   new CastMediaLoadDeferrer(render_frame, closure);
 202 }
 203
 204 }  // namespace shell
 205 }  // namespace chromecast