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/bind.h"
   8 #include "base/location.h"
   9 #include "base/single_thread_task_runner.h"
  10 #include "base/thread_task_runner_handle.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                       const CdmConfig& cdm_config,
  20                       blink::WebContentDecryptionModuleResult result) {
  21   // If |client| is gone (due to the frame getting destroyed), it is
  22   // impossible to create the CDM, so fail.
  23   if (!client) {
  24     result.completeWithError(
  25         blink::WebContentDecryptionModuleExceptionInvalidStateError, 0,
  26         "Failed to create CDM.");
  27     return;
  28   }
  29
  30   client->CreateCdm(key_system, security_origin, cdm_config, result);
  31 }
  32
  33 WebContentDecryptionModuleAccessImpl*
  34 WebContentDecryptionModuleAccessImpl::Create(
  35     const blink::WebString& key_system,
  36     const blink::WebSecurityOrigin& security_origin,
  37     const blink::WebMediaKeySystemConfiguration& configuration,
  38     const CdmConfig& cdm_config,
  39     const base::WeakPtr<WebEncryptedMediaClientImpl>& client) {
  40   return new WebContentDecryptionModuleAccessImpl(
  41       key_system, security_origin, configuration, cdm_config, client);
  42 }
  43
  44 WebContentDecryptionModuleAccessImpl::WebContentDecryptionModuleAccessImpl(
  45     const blink::WebString& key_system,
  46     const blink::WebSecurityOrigin& security_origin,
  47     const blink::WebMediaKeySystemConfiguration& configuration,
  48     const CdmConfig& cdm_config,
  49     const base::WeakPtr<WebEncryptedMediaClientImpl>& client)
  50     : key_system_(key_system),
  51       security_origin_(security_origin),
  52       configuration_(configuration),
  53       cdm_config_(cdm_config),
  54       client_(client) {
  55 }
  56
  57 WebContentDecryptionModuleAccessImpl::~WebContentDecryptionModuleAccessImpl() {
  58 }
  59
  60 blink::WebMediaKeySystemConfiguration
  61 WebContentDecryptionModuleAccessImpl::getConfiguration() {
  62   return configuration_;
  63 }
  64
  65 void WebContentDecryptionModuleAccessImpl::createContentDecryptionModule(
  66     blink::WebContentDecryptionModuleResult result) {
  67   // This method needs to run asynchronously, as it may need to load the CDM.
  68   // As this object's lifetime is controlled by MediaKeySystemAccess on the
  69   // blink side, copy all values needed by CreateCdm() in case the blink object
  70   // gets garbage-collected.
  71   base::ThreadTaskRunnerHandle::Get()->PostTask(
  72       FROM_HERE,
  73       base::Bind(&CreateCdm, client_, key_system_, security_origin_,
  74                  cdm_config_, result));
  75 }
  76
  77 }  // namespace media