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// 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.
#ifndef CONTENT_BROWSER_MEDIA_CDM_BROWSER_CDM_MANAGER_H_
#define CONTENT_BROWSER_MEDIA_CDM_BROWSER_CDM_MANAGER_H_
#include <map>
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/containers/scoped_ptr_hash_map.h"
#include "base/memory/scoped_ptr.h"
#include "content/common/content_export.h"
#include "content/common/media/cdm_messages_enums.h"
#include "content/public/browser/browser_message_filter.h"
#include "ipc/ipc_message.h"
// TODO(xhwang): Drop this when KeyError is moved to a common header.
#include "media/base/media_keys.h"
#include "url/gurl.h"
namespace media {
class BrowserCdm;
}
namespace content {
// This class manages all CDM objects. It receives control operations from the
// the render process, and forwards them to corresponding CDM object. Callbacks
// from CDM objects are converted to IPCs and then sent to the render process.
class CONTENT_EXPORT BrowserCdmManager : public BrowserMessageFilter {
public:
// Returns the BrowserCdmManager associated with the |render_process_id|.
// Returns NULL if no BrowserCdmManager is associated.
static BrowserCdmManager* FromProcess(int render_process_id);
// Constructs the BrowserCdmManager for |render_process_id| which runs on
// |task_runner|.
// If |task_runner| is not NULL, all CDM messages are posted to it. Otherwise,
// all messages are posted to the browser UI thread.
BrowserCdmManager(int render_process_id,
const scoped_refptr<base::TaskRunner>& task_runner);
// BrowserMessageFilter implementations.
virtual void OnDestruct() const override;
virtual base::TaskRunner* OverrideTaskRunnerForMessage(
const IPC::Message& message) override;
virtual bool OnMessageReceived(const IPC::Message& message) override;
media::BrowserCdm* GetCdm(int render_frame_id, int cdm_id);
// Notifies that the render frame has been deleted so that all CDMs belongs
// to this render frame needs to be destroyed as well. This is needed because
// in some cases (e.g. fast termination of the renderer), the message to
// destroy the CDM will not be received.
void RenderFrameDeleted(int render_frame_id);
protected:
friend class base::RefCountedThreadSafe<BrowserCdmManager>;
friend class base::DeleteHelper<BrowserCdmManager>;
virtual ~BrowserCdmManager();
private:
// CDM callbacks.
void OnSessionCreated(int render_frame_id,
int cdm_id,
uint32 session_id,
const std::string& web_session_id);
void OnSessionMessage(int render_frame_id,
int cdm_id,
uint32 session_id,
const std::vector<uint8>& message,
const GURL& destination_url);
void OnSessionReady(int render_frame_id, int cdm_id, uint32 session_id);
void OnSessionClosed(int render_frame_id, int cdm_id, uint32 session_id);
void OnSessionError(int render_frame_id,
int cdm_id,
uint32 session_id,
media::MediaKeys::KeyError error_code,
uint32 system_code);
// Message handlers.
void OnInitializeCdm(int render_frame_id,
int cdm_id,
const std::string& key_system,
const GURL& frame_url);
void OnCreateSession(int render_frame_id,
int cdm_id,
uint32 session_id,
CdmHostMsg_CreateSession_ContentType content_type,
const std::vector<uint8>& init_data);
void OnUpdateSession(int render_frame_id,
int cdm_id,
uint32 session_id,
const std::vector<uint8>& response);
void OnReleaseSession(int render_frame_id,
int cdm_id, uint32 session_id);
void OnDestroyCdm(int render_frame_id, int cdm_id);
void SendSessionError(int render_frame_id, int cdm_id, uint32 session_id);
// Adds a new CDM identified by |cdm_id| for the given |key_system| and
// |security_origin|.
void AddCdm(int render_frame_id,
int cdm_id,
const std::string& key_system,
const GURL& security_origin);
// Removes all CDMs associated with |render_frame_id|.
void RemoveAllCdmForFrame(int render_frame_id);
// Removes the CDM with the specified id.
void RemoveCdm(uint64 id);
// Requests permission for the given protected-media session (infobar).
void RequestSessionPermission(int render_frame_id,
const GURL& security_origin,
int cdm_id,
uint32 session_id,
const std::string& content_type,
const std::vector<uint8>& init_data);
// If |permitted| is false, it does nothing but send
// |CdmMsg_SessionError| IPC message.
// The primary use case is infobar permission callback, i.e., when infobar
// can decide user's intention either from interacting with the actual info
// bar or from the saved preference.
void CreateSessionIfPermitted(int render_frame_id,
int cdm_id,
uint32 session_id,
const std::string& content_type,
const std::vector<uint8>& init_data,
bool permitted);
const int render_process_id_;
// TaskRunner to dispatch all CDM messages to. If it's NULL, all messages are
// dispatched to the browser UI thread.
scoped_refptr<base::TaskRunner> task_runner_;
// The key in the following maps is a combination of |render_frame_id| and
// |cdm_id|.
// Map of managed BrowserCdms.
typedef base::ScopedPtrHashMap<uint64, media::BrowserCdm> CdmMap;
CdmMap cdm_map_;
// Map of CDM's security origin.
std::map<uint64, GURL> cdm_security_origin_map_;
// Map of callbacks to cancel the permission request.
std::map<uint64, base::Closure> cdm_cancel_permission_map_;
DISALLOW_COPY_AND_ASSIGN(BrowserCdmManager);
};
} // namespace content
#endif // CONTENT_BROWSER_MEDIA_CDM_BROWSER_CDM_MANAGER_H_