content/renderer/media/crypto/pepper_cdm_wrapper_impl.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 #if defined(ENABLE_PEPPER_CDMS)
   6 #include "content/renderer/media/crypto/pepper_cdm_wrapper_impl.h"
   7
   8 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
   9 #include "content/renderer/pepper/pepper_webplugin_impl.h"
  10 #include "third_party/WebKit/public/platform/WebString.h"
  11 #include "third_party/WebKit/public/web/WebDocument.h"
  12 #include "third_party/WebKit/public/web/WebElement.h"
  13 #include "third_party/WebKit/public/web/WebFrame.h"
  14 #include "third_party/WebKit/public/web/WebHelperPlugin.h"
  15 #include "third_party/WebKit/public/web/WebPlugin.h"
  16 #include "third_party/WebKit/public/web/WebPluginContainer.h"
  17 #include "third_party/WebKit/public/web/WebView.h"
  18
  19 namespace content {
  20
  21 void WebHelperPluginDeleter::operator()(blink::WebHelperPlugin* plugin) const {
  22   plugin->destroy();
  23 }
  24
  25 scoped_ptr<PepperCdmWrapper> PepperCdmWrapperImpl::Create(
  26     blink::WebLocalFrame* frame,
  27     const std::string& pluginType,
  28     const GURL& security_origin) {
  29   DCHECK(frame);
  30   ScopedHelperPlugin helper_plugin(blink::WebHelperPlugin::create(
  31       blink::WebString::fromUTF8(pluginType), frame));
  32   if (!helper_plugin)
  33     return scoped_ptr<PepperCdmWrapper>();
  34
  35   blink::WebPlugin* plugin = helper_plugin->getPlugin();
  36   DCHECK(!plugin->isPlaceholder());  // Prevented by Blink.
  37
  38   // Only Pepper plugins are supported, so it must ultimately be a ppapi object.
  39   PepperWebPluginImpl* ppapi_plugin = static_cast<PepperWebPluginImpl*>(plugin);
  40   scoped_refptr<PepperPluginInstanceImpl> plugin_instance =
  41       ppapi_plugin->instance();
  42   if (!plugin_instance.get())
  43     return scoped_ptr<PepperCdmWrapper>();
  44
  45   GURL url(plugin_instance->container()->element().document().url());
  46   CHECK_EQ(security_origin.GetOrigin(), url.GetOrigin())
  47       << "Pepper instance has a different origin than the EME call.";
  48
  49   if (!plugin_instance->GetContentDecryptorDelegate())
  50     return scoped_ptr<PepperCdmWrapper>();
  51
  52   return scoped_ptr<PepperCdmWrapper>(
  53       new PepperCdmWrapperImpl(helper_plugin.Pass(), plugin_instance));
  54 }
  55
  56 PepperCdmWrapperImpl::PepperCdmWrapperImpl(
  57     ScopedHelperPlugin helper_plugin,
  58     const scoped_refptr<PepperPluginInstanceImpl>& plugin_instance)
  59     : helper_plugin_(helper_plugin.Pass()),
  60       plugin_instance_(plugin_instance) {
  61   DCHECK(helper_plugin_);
  62   DCHECK(plugin_instance_.get());
  63   // Plugin must be a CDM.
  64   DCHECK(plugin_instance_->GetContentDecryptorDelegate());
  65 }
  66
  67 PepperCdmWrapperImpl::~PepperCdmWrapperImpl() {
  68   // Destroy the nested objects in reverse order.
  69   plugin_instance_ = NULL;
  70   helper_plugin_.reset();
  71 }
  72
  73 ContentDecryptorDelegate* PepperCdmWrapperImpl::GetCdmDelegate() {
  74   return plugin_instance_->GetContentDecryptorDelegate();
  75 }
  76
  77 }  // namespace content
  78
  79 #endif  // defined(ENABLE_PEPPER_CDMS)