src/content/renderer/media/crypto/pepper_cdm_wrapper_impl.h

   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 #ifndef CONTENT_RENDERER_MEDIA_CRYPTO_PEPPER_CDM_WRAPPER_IMPL_H_
   6 #define CONTENT_RENDERER_MEDIA_CRYPTO_PEPPER_CDM_WRAPPER_IMPL_H_
   7
   8 #if !defined(ENABLE_PEPPER_CDMS)
   9 #error This file should only be included when ENABLE_PEPPER_CDMS is defined
  10 #endif
  11
  12 #include "base/callback.h"
  13 #include "base/memory/ref_counted.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "content/renderer/media/crypto/pepper_cdm_wrapper.h"
  16
  17 namespace blink {
  18 class WebHelperPlugin;
  19 class WebLocalFrame;
  20 }
  21
  22 namespace content {
  23
  24 class ContentDecryptorDelegate;
  25 class PepperPluginInstanceImpl;
  26
  27 // Deleter for blink::WebHelperPlugin.
  28 struct WebHelperPluginDeleter {
  29   void operator()(blink::WebHelperPlugin* plugin) const;
  30 };
  31
  32 // Implements a wrapper on blink::WebHelperPlugin so that the plugin gets
  33 // destroyed properly. It owns all the objects derived from WebHelperPlugin
  34 // (WebPlugin, PepperPluginInstanceImpl, ContentDecryptionDelegate), and will
  35 // free them as necessary when this wrapper is destroyed. In particular, it
  36 // takes a reference to PepperPluginInstanceImpl so it won't go away until
  37 // this object is destroyed.
  38 //
  39 // Implemented so that lower layers in Chromium don't need to be aware of
  40 // blink:: objects.
  41 class PepperCdmWrapperImpl : public PepperCdmWrapper {
  42  public:
  43   static scoped_ptr<PepperCdmWrapper> Create(blink::WebLocalFrame* frame,
  44                                              const std::string& pluginType,
  45                                              const GURL& security_origin);
  46
  47   ~PepperCdmWrapperImpl() override;
  48
  49   // Returns the ContentDecryptorDelegate* associated with this plugin.
  50   ContentDecryptorDelegate* GetCdmDelegate() override;
  51
  52  private:
  53   typedef scoped_ptr<blink::WebHelperPlugin, WebHelperPluginDeleter>
  54       ScopedHelperPlugin;
  55
  56   // Takes ownership of |helper_plugin| and |plugin_instance|.
  57   PepperCdmWrapperImpl(
  58       ScopedHelperPlugin helper_plugin,
  59       const scoped_refptr<PepperPluginInstanceImpl>& plugin_instance);
  60
  61   ScopedHelperPlugin helper_plugin_;
  62   scoped_refptr<PepperPluginInstanceImpl> plugin_instance_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(PepperCdmWrapperImpl);
  65 };
  66
  67 }  // namespace content
  68
  69 #endif  // CONTENT_RENDERER_MEDIA_CRYPTO_PEPPER_CDM_WRAPPER_IMPL_H_