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      1 // Copyright 2013 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_WEBCONTENTDECRYPTIONMODULE_IMPL_H_
      6 #define CONTENT_RENDERER_MEDIA_WEBCONTENTDECRYPTIONMODULE_IMPL_H_
      7 
      8 #include <string>
      9 
     10 #include "base/memory/ref_counted.h"
     11 #include "base/memory/scoped_ptr.h"
     12 #include "base/strings/string16.h"
     13 #include "third_party/WebKit/public/platform/WebContentDecryptionModule.h"
     14 
     15 namespace blink {
     16 #if defined(ENABLE_PEPPER_CDMS)
     17 class WebLocalFrame;
     18 #endif
     19 class WebSecurityOrigin;
     20 }
     21 
     22 namespace media {
     23 class Decryptor;
     24 class MediaKeys;
     25 }
     26 
     27 namespace content {
     28 
     29 class CdmSessionAdapter;
     30 #if defined(ENABLE_BROWSER_CDMS)
     31 class RendererCdmManager;
     32 #endif
     33 class WebContentDecryptionModuleSessionImpl;
     34 
     35 class WebContentDecryptionModuleImpl
     36     : public blink::WebContentDecryptionModule {
     37  public:
     38   static WebContentDecryptionModuleImpl* Create(
     39 #if defined(ENABLE_PEPPER_CDMS)
     40       blink::WebLocalFrame* frame,
     41 #elif defined(ENABLE_BROWSER_CDMS)
     42       RendererCdmManager* manager,
     43 #endif
     44       const blink::WebSecurityOrigin& security_origin,
     45       const base::string16& key_system);
     46 
     47   virtual ~WebContentDecryptionModuleImpl();
     48 
     49   // Returns the Decryptor associated with this CDM. May be NULL if no
     50   // Decryptor associated with the MediaKeys object.
     51   // TODO(jrummell): Figure out lifetimes, as WMPI may still use the decryptor
     52   // after WebContentDecryptionModule is freed. http://crbug.com/330324
     53   media::Decryptor* GetDecryptor();
     54 
     55 #if defined(ENABLE_BROWSER_CDMS)
     56   // Returns the CDM ID associated with this object. May be kInvalidCdmId if no
     57   // CDM ID is associated, such as when Clear Key is used.
     58   int GetCdmId() const;
     59 #endif  // defined(ENABLE_BROWSER_CDMS)
     60 
     61   // blink::WebContentDecryptionModule implementation.
     62   virtual blink::WebContentDecryptionModuleSession* createSession(
     63       blink::WebContentDecryptionModuleSession::Client* client);
     64 
     65  private:
     66   // Takes reference to |adapter|.
     67   WebContentDecryptionModuleImpl(scoped_refptr<CdmSessionAdapter> adapter);
     68 
     69   scoped_refptr<CdmSessionAdapter> adapter_;
     70 
     71   DISALLOW_COPY_AND_ASSIGN(WebContentDecryptionModuleImpl);
     72 };
     73 
     74 // Allow typecasting from blink type as this is the only implementation.
     75 inline WebContentDecryptionModuleImpl* ToWebContentDecryptionModuleImpl(
     76     blink::WebContentDecryptionModule* cdm) {
     77   return static_cast<WebContentDecryptionModuleImpl*>(cdm);
     78 }
     79 
     80 }  // namespace content
     81 
     82 #endif  // CONTENT_RENDERER_MEDIA_WEBCONTENTDECRYPTIONMODULE_IMPL_H_
     83