content/renderer/media/webcontentdecryptionmodule_impl.cc

   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 #include "content/renderer/media/webcontentdecryptionmodule_impl.h"
   6
   7 #include <map>
   8 #include <vector>
   9
  10 #include "base/basictypes.h"
  11 #include "base/bind.h"
  12 #include "base/logging.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "content/renderer/media/cdm_session_adapter.h"
  16 #include "content/renderer/media/crypto/key_systems.h"
  17 #include "content/renderer/media/webcontentdecryptionmodulesession_impl.h"
  18 #include "media/base/media_keys.h"
  19 #include "third_party/WebKit/public/platform/WebString.h"
  20 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
  21 #include "url/gurl.h"
  22
  23 #if defined(ENABLE_PEPPER_CDMS)
  24 #include "content/renderer/media/crypto/pepper_cdm_wrapper_impl.h"
  25 #endif
  26
  27 namespace content {
  28
  29 WebContentDecryptionModuleImpl* WebContentDecryptionModuleImpl::Create(
  30 #if defined(ENABLE_PEPPER_CDMS)
  31     blink::WebLocalFrame* frame,
  32 #elif defined(ENABLE_BROWSER_CDMS)
  33     RendererCdmManager* manager,
  34 #endif
  35     const blink::WebSecurityOrigin& security_origin,
  36     const base::string16& key_system) {
  37 #if defined(ENABLE_PEPPER_CDMS)
  38   DCHECK(frame);
  39 #elif defined(ENABLE_BROWSER_CDMS)
  40   DCHECK(manager);
  41 #endif
  42   DCHECK(!security_origin.isNull());
  43   DCHECK(!key_system.empty());
  44
  45   // TODO(ddorwin): Guard against this in supported types check and remove this.
  46   // Chromium only supports ASCII key systems.
  47   if (!base::IsStringASCII(key_system)) {
  48     NOTREACHED();
  49     return NULL;
  50   }
  51
  52   std::string key_system_ascii = base::UTF16ToASCII(key_system);
  53   if (!IsConcreteSupportedKeySystem(key_system_ascii))
  54     return NULL;
  55
  56   // If unique security origin, don't try to create the CDM.
  57   if (security_origin.isUnique() || security_origin.toString() == "null") {
  58     DLOG(ERROR) << "CDM use not allowed for unique security origin.";
  59     return NULL;
  60   }
  61
  62   scoped_refptr<CdmSessionAdapter> adapter(new CdmSessionAdapter());
  63   GURL security_origin_as_gurl(security_origin.toString());
  64
  65   if (!adapter->Initialize(
  66 #if defined(ENABLE_PEPPER_CDMS)
  67           base::Bind(&PepperCdmWrapperImpl::Create, frame),
  68 #elif defined(ENABLE_BROWSER_CDMS)
  69           manager,
  70 #endif
  71           key_system_ascii,
  72           security_origin_as_gurl)) {
  73     return NULL;
  74   }
  75
  76   return new WebContentDecryptionModuleImpl(adapter);
  77 }
  78
  79 WebContentDecryptionModuleImpl::WebContentDecryptionModuleImpl(
  80     scoped_refptr<CdmSessionAdapter> adapter)
  81     : adapter_(adapter) {}
  82
  83 WebContentDecryptionModuleImpl::~WebContentDecryptionModuleImpl() {
  84 }
  85
  86 // The caller owns the created session.
  87 blink::WebContentDecryptionModuleSession*
  88 WebContentDecryptionModuleImpl::createSession() {
  89   return adapter_->CreateSession();
  90 }
  91
  92 blink::WebContentDecryptionModuleSession*
  93 WebContentDecryptionModuleImpl::createSession(
  94     blink::WebContentDecryptionModuleSession::Client* client) {
  95   WebContentDecryptionModuleSessionImpl* session = adapter_->CreateSession();
  96   session->setClientInterface(client);
  97   return session;
  98 }
  99
 100 media::Decryptor* WebContentDecryptionModuleImpl::GetDecryptor() {
 101   return adapter_->GetDecryptor();
 102 }
 103
 104 #if defined(ENABLE_BROWSER_CDMS)
 105 int WebContentDecryptionModuleImpl::GetCdmId() const {
 106   return adapter_->GetCdmId();
 107 }
 108 #endif  // defined(ENABLE_BROWSER_CDMS)
 109
 110 }  // namespace content