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/memory/scoped_ptr.h"
  10 #include "base/single_thread_task_runner.h"
  11 #include "base/thread_task_runner_handle.h"
  12 #include "media/blink/webencryptedmediaclient_impl.h"
  13
  14 namespace media {
  15
  16 // The caller owns the created cdm (passed back using |result|).
  17 static void CreateCdm(
  18     const base::WeakPtr<WebEncryptedMediaClientImpl>& client,
  19     const blink::WebString& key_system,
  20     const blink::WebSecurityOrigin& security_origin,
  21     const CdmConfig& cdm_config,
  22     scoped_ptr<blink::WebContentDecryptionModuleResult> result) {
  23   // If |client| is gone (due to the frame getting destroyed), it is
  24   // impossible to create the CDM, so fail.
  25   if (!client) {
  26     result->completeWithError(
  27         blink::WebContentDecryptionModuleExceptionInvalidStateError, 0,
  28         "Failed to create CDM.");
  29     return;
  30   }
  31
  32   client->CreateCdm(key_system, security_origin, cdm_config, result.Pass());
  33 }
  34
  35 WebContentDecryptionModuleAccessImpl*
  36 WebContentDecryptionModuleAccessImpl::Create(
  37     const blink::WebString& key_system,
  38     const blink::WebSecurityOrigin& security_origin,
  39     const blink::WebMediaKeySystemConfiguration& configuration,
  40     const CdmConfig& cdm_config,
  41     const base::WeakPtr<WebEncryptedMediaClientImpl>& client) {
  42   return new WebContentDecryptionModuleAccessImpl(
  43       key_system, security_origin, configuration, cdm_config, client);
  44 }
  45
  46 WebContentDecryptionModuleAccessImpl::WebContentDecryptionModuleAccessImpl(
  47     const blink::WebString& key_system,
  48     const blink::WebSecurityOrigin& security_origin,
  49     const blink::WebMediaKeySystemConfiguration& configuration,
  50     const CdmConfig& cdm_config,
  51     const base::WeakPtr<WebEncryptedMediaClientImpl>& client)
  52     : key_system_(key_system),
  53       security_origin_(security_origin),
  54       configuration_(configuration),
  55       cdm_config_(cdm_config),
  56       client_(client) {
  57 }
  58
  59 WebContentDecryptionModuleAccessImpl::~WebContentDecryptionModuleAccessImpl() {
  60 }
  61
  62 blink::WebMediaKeySystemConfiguration
  63 WebContentDecryptionModuleAccessImpl::getConfiguration() {
  64   return configuration_;
  65 }
  66
  67 void WebContentDecryptionModuleAccessImpl::createContentDecryptionModule(
  68     blink::WebContentDecryptionModuleResult result) {
  69   // This method needs to run asynchronously, as it may need to load the CDM.
  70   // As this object's lifetime is controlled by MediaKeySystemAccess on the
  71   // blink side, copy all values needed by CreateCdm() in case the blink object
  72   // gets garbage-collected.
  73   scoped_ptr<blink::WebContentDecryptionModuleResult> result_copy(
  74       new blink::WebContentDecryptionModuleResult(result));
  75   base::ThreadTaskRunnerHandle::Get()->PostTask(
  76       FROM_HERE, base::Bind(&CreateCdm, client_, key_system_, security_origin_,
  77                             cdm_config_, base::Passed(&result_copy)));
  78 }
  79
  80 }  // namespace media