src/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 blink {
  28 class WebFrame;
  29 }
  30
  31 namespace content {
  32
  33 WebContentDecryptionModuleImpl* WebContentDecryptionModuleImpl::Create(
  34     blink::WebLocalFrame* frame,
  35     const blink::WebSecurityOrigin& security_origin,
  36     const base::string16& key_system) {
  37   DCHECK(frame);
  38   DCHECK(!security_origin.isNull());
  39   DCHECK(!key_system.empty());
  40
  41   // TODO(ddorwin): Guard against this in supported types check and remove this.
  42   // Chromium only supports ASCII key systems.
  43   if (!base::IsStringASCII(key_system)) {
  44     NOTREACHED();
  45     return NULL;
  46   }
  47
  48   std::string key_system_ascii = base::UTF16ToASCII(key_system);
  49   if (!IsConcreteSupportedKeySystem(key_system_ascii))
  50     return NULL;
  51
  52   // If unique security origin, don't try to create the CDM.
  53   if (security_origin.isUnique() || security_origin.toString() == "null") {
  54     DLOG(ERROR) << "CDM use not allowed for unique security origin.";
  55     return NULL;
  56   }
  57
  58   scoped_refptr<CdmSessionAdapter> adapter(new CdmSessionAdapter());
  59   GURL security_origin_as_gurl(security_origin.toString());
  60
  61   if (!adapter->Initialize(
  62 #if defined(ENABLE_PEPPER_CDMS)
  63           base::Bind(&PepperCdmWrapperImpl::Create, frame),
  64 #endif
  65           key_system_ascii,
  66           security_origin_as_gurl)) {
  67     return NULL;
  68   }
  69
  70   return new WebContentDecryptionModuleImpl(adapter);
  71 }
  72
  73 WebContentDecryptionModuleImpl::WebContentDecryptionModuleImpl(
  74     scoped_refptr<CdmSessionAdapter> adapter)
  75     : adapter_(adapter) {}
  76
  77 WebContentDecryptionModuleImpl::~WebContentDecryptionModuleImpl() {
  78 }
  79
  80 // The caller owns the created session.
  81 blink::WebContentDecryptionModuleSession*
  82 WebContentDecryptionModuleImpl::createSession(
  83     blink::WebContentDecryptionModuleSession::Client* client) {
  84   return adapter_->CreateSession(client);
  85 }
  86
  87 media::Decryptor* WebContentDecryptionModuleImpl::GetDecryptor() {
  88   return adapter_->GetDecryptor();
  89 }
  90
  91 #if defined(OS_ANDROID)
  92 int WebContentDecryptionModuleImpl::GetCdmId() const {
  93   return adapter_->GetCdmId();
  94 }
  95 #endif  // defined(OS_ANDROID)
  96
  97 }  // namespace content