chromecast/renderer/cast_render_process_observer.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_render_process_observer.h"
   6
   7 #include "chromecast/renderer/media/cma_message_filter_proxy.h"
   8 #include "content/public/renderer/render_thread.h"
   9
  10 namespace chromecast {
  11 namespace shell {
  12
  13 CastRenderProcessObserver::CastRenderProcessObserver(
  14     const std::vector<scoped_refptr<IPC::MessageFilter>>&
  15         platform_message_filters)
  16     : platform_message_filters_(platform_message_filters) {
  17   content::RenderThread* thread = content::RenderThread::Get();
  18   thread->AddObserver(this);
  19   CreateCustomFilters();
  20 }
  21
  22 CastRenderProcessObserver::~CastRenderProcessObserver() {
  23   // CastRenderProcessObserver outlives content::RenderThread.
  24   // No need to explicitly call RemoveObserver in teardown.
  25 }
  26
  27 void CastRenderProcessObserver::CreateCustomFilters() {
  28   content::RenderThread* thread = content::RenderThread::Get();
  29 #if !defined(OS_ANDROID)
  30   cma_message_filter_proxy_ =
  31       new media::CmaMessageFilterProxy(thread->GetIOMessageLoopProxy());
  32   thread->AddFilter(cma_message_filter_proxy_.get());
  33 #endif  // !defined(OS_ANDROID)
  34   for (const auto& filter : platform_message_filters_) {
  35     thread->AddFilter(filter.get());
  36   }
  37 }
  38
  39 void CastRenderProcessObserver::OnRenderProcessShutdown() {
  40   content::RenderThread* thread = content::RenderThread::Get();
  41 #if !defined(OS_ANDROID)
  42   if (cma_message_filter_proxy_.get()) {
  43     thread->RemoveFilter(cma_message_filter_proxy_.get());
  44     cma_message_filter_proxy_ = NULL;
  45   }
  46 #endif  // !defined(OS_ANDROID)
  47   for (auto& filter : platform_message_filters_) {
  48     if (filter.get()) {
  49       thread->RemoveFilter(filter.get());
  50       filter = nullptr;
  51     }
  52   }
  53   platform_message_filters_.clear();
  54 }
  55
  56 }  // namespace shell
  57 }  // namespace chromecast