Separate RendererCdmManager from RendererMediaPlayerManager.

content/renderer/media/crypto/renderer_cdm_manager.cc

+// 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 "content/renderer/media/crypto/renderer_cdm_manager.h"
+
+#include "base/stl_util.h"
+#include "content/common/media/cdm_messages.h"
+#include "content/renderer/media/crypto/proxy_media_keys.h"
+
+namespace content {
+
+// Maximum sizes for various EME API parameters. These are checks to prevent
+// unnecessarily large messages from being passed around, and the sizes
+// are somewhat arbitrary as the EME spec doesn't specify any limits.
+const size_t kMaxWebSessionIdLength = 512;
+const size_t kMaxSessionMessageLength = 10240;  // 10 KB
+
+RendererCdmManager::RendererCdmManager(RenderFrame* render_frame)
+    : RenderFrameObserver(render_frame) {
+}
+
+RendererCdmManager::~RendererCdmManager() {}
+
+bool RendererCdmManager::OnMessageReceived(const IPC::Message& msg) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(RendererCdmManager, msg)
+    IPC_MESSAGE_HANDLER(CdmMsg_SessionCreated, OnSessionCreated)
+    IPC_MESSAGE_HANDLER(CdmMsg_SessionMessage, OnSessionMessage)
+    IPC_MESSAGE_HANDLER(CdmMsg_SessionReady, OnSessionReady)
+    IPC_MESSAGE_HANDLER(CdmMsg_SessionClosed, OnSessionClosed)
+    IPC_MESSAGE_HANDLER(CdmMsg_SessionError, OnSessionError)
+  IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void RendererCdmManager::InitializeCdm(int cdm_id,
+                                       ProxyMediaKeys* media_keys,
+                                       const std::string& key_system,
+                                       const GURL& security_origin) {
+  DCHECK_NE(cdm_id, kInvalidCdmId);
+  RegisterMediaKeys(cdm_id, media_keys);
+  Send(new CdmHostMsg_InitializeCdm(
+      routing_id(), cdm_id, key_system, security_origin));
+}
+
+void RendererCdmManager::CreateSession(
+    int cdm_id,
+    uint32 session_id,
+    CdmHostMsg_CreateSession_ContentType content_type,
+    const std::vector<uint8>& init_data) {
+  DCHECK(GetMediaKeys(cdm_id)) << "|cdm_id| not registered.";
+  Send(new CdmHostMsg_CreateSession(
+      routing_id(), cdm_id, session_id, content_type, init_data));
+}
+
+void RendererCdmManager::UpdateSession(int cdm_id,
+                                       uint32 session_id,
+                                       const std::vector<uint8>& response) {
+  DCHECK(GetMediaKeys(cdm_id)) << "|cdm_id| not registered.";
+  Send(
+      new CdmHostMsg_UpdateSession(routing_id(), cdm_id, session_id, response));
+}
+
+void RendererCdmManager::ReleaseSession(int cdm_id, uint32 session_id) {
+  DCHECK(GetMediaKeys(cdm_id)) << "|cdm_id| not registered.";
+  Send(new CdmHostMsg_ReleaseSession(routing_id(), cdm_id, session_id));
+}
+
+void RendererCdmManager::DestroyCdm(int cdm_id) {
+  DCHECK(GetMediaKeys(cdm_id)) << "|cdm_id| not registered.";
+  proxy_media_keys_map_.erase(cdm_id);
+  Send(new CdmHostMsg_DestroyCdm(routing_id(), cdm_id));
+}
+
+void RendererCdmManager::OnSessionCreated(int cdm_id,
+                                          uint32 session_id,
+                                          const std::string& web_session_id) {
+  if (web_session_id.length() > kMaxWebSessionIdLength) {
+    OnSessionError(cdm_id, session_id, media::MediaKeys::kUnknownError, 0);
+    return;
+  }
+
+  ProxyMediaKeys* media_keys = GetMediaKeys(cdm_id);
+  if (media_keys)
+    media_keys->OnSessionCreated(session_id, web_session_id);
+}
+
+void RendererCdmManager::OnSessionMessage(int cdm_id,
+                                          uint32 session_id,
+                                          const std::vector<uint8>& message,
+                                          const GURL& destination_url) {
+  if (message.size() > kMaxSessionMessageLength) {
+    OnSessionError(cdm_id, session_id, media::MediaKeys::kUnknownError, 0);
+    return;
+  }
+
+  ProxyMediaKeys* media_keys = GetMediaKeys(cdm_id);
+  if (media_keys)
+    media_keys->OnSessionMessage(session_id, message, destination_url);
+}
+
+void RendererCdmManager::OnSessionReady(int cdm_id, uint32 session_id) {
+  ProxyMediaKeys* media_keys = GetMediaKeys(cdm_id);
+  if (media_keys)
+    media_keys->OnSessionReady(session_id);
+}
+
+void RendererCdmManager::OnSessionClosed(int cdm_id, uint32 session_id) {
+  ProxyMediaKeys* media_keys = GetMediaKeys(cdm_id);
+  if (media_keys)
+    media_keys->OnSessionClosed(session_id);
+}
+
+void RendererCdmManager::OnSessionError(int cdm_id,
+                                        uint32 session_id,
+                                        media::MediaKeys::KeyError error_code,
+                                        uint32 system_code) {
+  ProxyMediaKeys* media_keys = GetMediaKeys(cdm_id);
+  if (media_keys)
+    media_keys->OnSessionError(session_id, error_code, system_code);
+}
+
+void RendererCdmManager::RegisterMediaKeys(int cdm_id,
+                                           ProxyMediaKeys* media_keys) {
+  DCHECK(!ContainsKey(proxy_media_keys_map_, cdm_id));
+  proxy_media_keys_map_[cdm_id] = media_keys;
+}
+
+ProxyMediaKeys* RendererCdmManager::GetMediaKeys(int cdm_id) {
+  std::map<int, ProxyMediaKeys*>::iterator iter =
+      proxy_media_keys_map_.find(cdm_id);
+  return (iter != proxy_media_keys_map_.end()) ? iter->second : NULL;
+}
+
+}  // namespace content