default_cdm_factory.cc 2.0 KB

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  1. // Copyright 2014 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. #include "media/cdm/default_cdm_factory.h"
  5. #include "base/bind.h"
  6. #include "base/callback_helpers.h"
  7. #include "base/location.h"
  8. #include "base/task/single_thread_task_runner.h"
  9. #include "base/threading/thread_task_runner_handle.h"
  10. #include "media/base/cdm_config.h"
  11. #include "media/base/content_decryption_module.h"
  12. #include "media/base/key_system_names.h"
  13. #include "media/base/media_switches.h"
  14. #include "media/cdm/aes_decryptor.h"
  15. #include "url/origin.h"
  16. namespace media {
  17. DefaultCdmFactory::DefaultCdmFactory() = default;
  18. DefaultCdmFactory::~DefaultCdmFactory() = default;
  19. static bool ShouldCreateAesDecryptor(const std::string& key_system) {
  20. if (IsClearKey(key_system))
  21. return true;
  22. // Should create AesDecryptor to support External Clear Key key system.
  23. // This is used for testing.
  24. return base::FeatureList::IsEnabled(media::kExternalClearKeyForTesting) &&
  25. IsExternalClearKey(key_system);
  26. }
  27. void DefaultCdmFactory::Create(
  28. const CdmConfig& cdm_config,
  29. const SessionMessageCB& session_message_cb,
  30. const SessionClosedCB& session_closed_cb,
  31. const SessionKeysChangeCB& session_keys_change_cb,
  32. const SessionExpirationUpdateCB& session_expiration_update_cb,
  33. CdmCreatedCB cdm_created_cb) {
  34. if (!ShouldCreateAesDecryptor(cdm_config.key_system)) {
  35. base::ThreadTaskRunnerHandle::Get()->PostTask(
  36. FROM_HERE, base::BindOnce(std::move(cdm_created_cb), nullptr,
  37. "Unsupported key system."));
  38. return;
  39. }
  40. scoped_refptr<ContentDecryptionModule> cdm(
  41. new AesDecryptor(session_message_cb, session_closed_cb,
  42. session_keys_change_cb, session_expiration_update_cb));
  43. base::ThreadTaskRunnerHandle::Get()->PostTask(
  44. FROM_HERE, base::BindOnce(std::move(cdm_created_cb), cdm, ""));
  45. }
  46. } // namespace media