media/blink/webcontentdecryptionmoduleaccess_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 "media/blink/webcontentdecryptionmoduleaccess_impl.h"
   6
   7 #include "base/basictypes.h"
   8 #include "base/bind.h"
   9 #include "base/location.h"
  10 #include "base/message_loop/message_loop_proxy.h"
  11 #include "media/blink/webencryptedmediaclient_impl.h"
  12
  13 namespace media {
  14
  15 // The caller owns the created cdm (passed back using |result|).
  16 static void CreateCdm(const base::WeakPtr<WebEncryptedMediaClientImpl>& client,
  17                       const blink::WebString& key_system,
  18                       const blink::WebSecurityOrigin& security_origin,
  19                       blink::WebContentDecryptionModuleResult result) {
  20   // If |client| is gone (due to the frame getting destroyed), it is
  21   // impossible to create the CDM, so fail.
  22   if (!client) {
  23     result.completeWithError(
  24         blink::WebContentDecryptionModuleExceptionInvalidStateError, 0,
  25         "Failed to create CDM.");
  26     return;
  27   }
  28
  29   client->CreateCdm(key_system, security_origin, result);
  30 }
  31
  32 WebContentDecryptionModuleAccessImpl*
  33 WebContentDecryptionModuleAccessImpl::Create(
  34     const blink::WebString& key_system,
  35     const blink::WebMediaKeySystemConfiguration& configuration,
  36     const blink::WebSecurityOrigin& security_origin,
  37     const base::WeakPtr<WebEncryptedMediaClientImpl>& client) {
  38   return new WebContentDecryptionModuleAccessImpl(key_system, configuration,
  39                                                   security_origin, client);
  40 }
  41
  42 WebContentDecryptionModuleAccessImpl::WebContentDecryptionModuleAccessImpl(
  43     const blink::WebString& key_system,
  44     const blink::WebMediaKeySystemConfiguration& configuration,
  45     const blink::WebSecurityOrigin& security_origin,
  46     const base::WeakPtr<WebEncryptedMediaClientImpl>& client)
  47     : key_system_(key_system),
  48       configuration_(configuration),
  49       security_origin_(security_origin),
  50       client_(client) {
  51 }
  52
  53 WebContentDecryptionModuleAccessImpl::~WebContentDecryptionModuleAccessImpl() {
  54 }
  55
  56 blink::WebMediaKeySystemConfiguration
  57 WebContentDecryptionModuleAccessImpl::getConfiguration() {
  58   return configuration_;
  59 }
  60
  61 void WebContentDecryptionModuleAccessImpl::createContentDecryptionModule(
  62     blink::WebContentDecryptionModuleResult result) {
  63   // This method needs to run asynchronously, as it may need to load the CDM.
  64   // As this object's lifetime is controlled by MediaKeySystemAccess on the
  65   // blink side, copy all values needed by CreateCdm() in case the blink object
  66   // gets garbage-collected.
  67   base::MessageLoopProxy::current()->PostTask(
  68       FROM_HERE,
  69       base::Bind(&CreateCdm, client_, key_system_, security_origin_, result));
  70 }
  71
  72 }  // namespace media