text: // Copyright 2014 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #include "media/base/browser_cdm_factory.h"
  
  #include "base/command_line.h"
  #include "base/logging.h"
  #include "base/memory/scoped_ptr.h"
  #include "media/base/android/media_drm_bridge.h"
  #include "media/base/media_switches.h"
  
  namespace media {
  
  scoped_ptr<BrowserCdm> CreateBrowserCdm(
      const std::string& key_system,
      const BrowserCdm::SessionCreatedCB& session_created_cb,
      const BrowserCdm::SessionMessageCB& session_message_cb,
      const BrowserCdm::SessionReadyCB& session_ready_cb,
      const BrowserCdm::SessionClosedCB& session_closed_cb,
      const BrowserCdm::SessionErrorCB& session_error_cb) {
    if (!MediaDrmBridge::IsKeySystemSupported(key_system)) {
      NOTREACHED() << "Unsupported key system: " << key_system;
      return scoped_ptr<BrowserCdm>();
    }
  
    scoped_ptr<MediaDrmBridge> cdm(MediaDrmBridge::Create(key_system,
                                                          session_created_cb,
                                                          session_message_cb,
                                                          session_ready_cb,
                                                          session_closed_cb,
                                                          session_error_cb));
    if (!cdm) {
      NOTREACHED() << "MediaDrmBridge cannot be created for " << key_system;
      return scoped_ptr<BrowserCdm>();
    }
  
    // TODO(xhwang/ddorwin): Pass the security level from key system.
    MediaDrmBridge::SecurityLevel security_level =
        MediaDrmBridge::SECURITY_LEVEL_3;
    if (CommandLine::ForCurrentProcess()->HasSwitch(
            switches::kMediaDrmEnableNonCompositing)) {
      security_level = MediaDrmBridge::SECURITY_LEVEL_1;
    }
    if (!cdm->SetSecurityLevel(security_level)) {
      DVLOG(1) << "failed to set security level " << security_level;
      return scoped_ptr<BrowserCdm>();
    }
  
    return cdm.Pass();
  }
  
  }  // namespace media
  