media: Support unprefixed EME API on Android.

content/renderer/media/crypto/proxy_media_keys.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/proxy_media_keys.h"
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "content/renderer/media/crypto/renderer_cdm_manager.h"
+#include "media/base/cdm_key_information.h"
 #include "media/base/cdm_promise.h"
 #include "media/base/key_systems.h"
 
 namespace content {
 
 scoped_ptr<ProxyMediaKeys> ProxyMediaKeys::Create(
     const std::string& key_system,
     const GURL& security_origin,
     RendererCdmManager* manager,
     const media::SessionMessageCB& session_message_cb,
     const media::SessionClosedCB& session_closed_cb,
     const media::SessionErrorCB& session_error_cb,
     const media::SessionKeysChangeCB& session_keys_change_cb,
     const media::SessionExpirationUpdateCB& session_expiration_update_cb) {
   DCHECK(manager);
-
-  // TODO(jrummell): Add support for SessionKeysChangeCB and
-  // SessionExpirationUpdateCB.
-  scoped_ptr<ProxyMediaKeys> proxy_media_keys(
-      new ProxyMediaKeys(manager,
-                         session_message_cb,
-                         session_closed_cb,
-                         session_error_cb));
+  scoped_ptr<ProxyMediaKeys> proxy_media_keys(new ProxyMediaKeys(
+      manager, session_message_cb, session_closed_cb, session_error_cb,
+      session_keys_change_cb, session_expiration_update_cb));
   proxy_media_keys->InitializeCdm(key_system, security_origin);
   return proxy_media_keys.Pass();
 }
 
 ProxyMediaKeys::~ProxyMediaKeys() {
   manager_->DestroyCdm(cdm_id_);
   manager_->UnregisterMediaKeys(cdm_id_);
-
-  // Reject any outstanding promises.
-  for (PromiseMap::iterator it = session_id_to_promise_map_.begin();
-       it != session_id_to_promise_map_.end();
-       ++it) {
-    it->second->reject(
-        media::MediaKeys::NOT_SUPPORTED_ERROR, 0, "The operation was aborted.");
-  }
-  session_id_to_promise_map_.clear();
+  cdm_promise_adapter_.Clear();
 }
 
 void ProxyMediaKeys::SetServerCertificate(
     const uint8* certificate_data,
     int certificate_data_length,
     scoped_ptr<media::SimpleCdmPromise> promise) {
-  promise->reject(NOT_SUPPORTED_ERROR, 0, "Not yet implemented.");
+  uint32_t promise_id = cdm_promise_adapter_.SavePromise(promise.Pass());
+  manager_->SetServerCertificate(
+      cdm_id_, promise_id,
+      std::vector<uint8>(certificate_data,
+                         certificate_data + certificate_data_length));
 }
 
 void ProxyMediaKeys::CreateSessionAndGenerateRequest(
     SessionType session_type,

[ddorwin, 2015/01/14 23:09:20]

This param is ignored. Should be checked for support (DCHECK once 384152 is
fixed) and passed down (we shouldn't prevent support at the API level).

[xhwang, 2015/01/15 08:13:13]

Checked. Not passing down due to IPC limitations. See my comment in another
file.

     const std::string& init_data_type,
     const uint8* init_data,
     int init_data_length,
     scoped_ptr<media::NewSessionCdmPromise> promise) {
   // TODO(xhwang): Move these checks up to blink and DCHECK here.
   // See http://crbug.com/342510
-  CdmHostMsg_CreateSession_ContentType create_session_content_type;
+  CdmHostMsg_CreateSession_InitDataType create_session_init_data_type;
   if (init_data_type == "cenc") {
-    create_session_content_type = CREATE_SESSION_TYPE_MP4;
+    create_session_init_data_type = CREATE_SESSION_TYPE_MP4;

[ddorwin, 2015/01/14 23:09:20]

We need to fix the "...SESSION_TYPE.." naming at some point as it is confusing.

[xhwang, 2015/01/15 08:13:13]

Agreed.

   } else if (init_data_type == "webm") {
-    create_session_content_type = CREATE_SESSION_TYPE_WEBM;
+    create_session_init_data_type = CREATE_SESSION_TYPE_WEBM;
   } else {
     DLOG(ERROR) << "Unsupported EME CreateSession content type of "
                 << init_data_type;
     promise->reject(
         NOT_SUPPORTED_ERROR,
         0,
         "Unsupported EME CreateSession init data type of " + init_data_type);
     return;
   }
 
-  uint32 session_id = CreateSessionId();
-  SavePromise(session_id, promise.Pass());
-  manager_->CreateSession(
-      cdm_id_,
-      session_id,
-      create_session_content_type,
+  uint32_t promise_id = cdm_promise_adapter_.SavePromise(promise.Pass());
+  manager_->CreateSessionAndGenerateRequest(
+      cdm_id_, promise_id, create_session_init_data_type,
       std::vector<uint8>(init_data, init_data + init_data_length));
 }
 
 void ProxyMediaKeys::LoadSession(
     SessionType session_type,
-    const std::string& web_session_id,
+    const std::string& session_id,
     scoped_ptr<media::NewSessionCdmPromise> promise) {
   // TODO(xhwang): Check key system and platform support for LoadSession in
   // blink and add NOTREACHED() here.

[ddorwin, 2015/01/14 23:09:20]

This at least depends on 384152.

[xhwang, 2015/01/15 08:13:13]

Done.

   DLOG(ERROR) << "ProxyMediaKeys doesn't support session loading.";
   promise->reject(NOT_SUPPORTED_ERROR, 0, "LoadSession() is not supported.");
 }
 
 void ProxyMediaKeys::UpdateSession(
-    const std::string& web_session_id,
+    const std::string& session_id,
     const uint8* response,
     int response_length,
     scoped_ptr<media::SimpleCdmPromise> promise) {
-  uint32 session_id = LookupSessionId(web_session_id);
-  if (!session_id) {
-    promise->reject(INVALID_ACCESS_ERROR, 0, "Session does not exist.");
-    return;
-  }
-
-  SavePromise(session_id, promise.Pass());
+  uint32_t promise_id = cdm_promise_adapter_.SavePromise(promise.Pass());
   manager_->UpdateSession(
-      cdm_id_,
-      session_id,
+      cdm_id_, promise_id, session_id,
       std::vector<uint8>(response, response + response_length));
 }
 
-void ProxyMediaKeys::CloseSession(const std::string& web_session_id,
+void ProxyMediaKeys::CloseSession(const std::string& session_id,
                                   scoped_ptr<media::SimpleCdmPromise> promise) {
-  uint32 session_id = LookupSessionId(web_session_id);
-  if (!session_id) {
-    promise->reject(INVALID_ACCESS_ERROR, 0, "Session does not exist.");
-    return;
-  }
-
-  SavePromise(session_id, promise.Pass());
-  manager_->ReleaseSession(cdm_id_, session_id);
+  uint32_t promise_id = cdm_promise_adapter_.SavePromise(promise.Pass());
+  manager_->CloseSession(cdm_id_, promise_id, session_id);
 }
 
 void ProxyMediaKeys::RemoveSession(
-    const std::string& web_session_id,
+    const std::string& session_id,
     scoped_ptr<media::SimpleCdmPromise> promise) {
-  promise->reject(NOT_SUPPORTED_ERROR, 0, "Not yet implemented.");
+  promise->reject(NOT_SUPPORTED_ERROR, 0, "RemoveSession() not supported.");

[ddorwin, 2015/01/14 23:09:20]

Similar TODO here?

[xhwang, 2015/01/15 08:13:13]

Done.

 }
 
 media::CdmContext* ProxyMediaKeys::GetCdmContext() {
   return this;
 }
 
 media::Decryptor* ProxyMediaKeys::GetDecryptor() {
   return NULL;
 }
 
 int ProxyMediaKeys::GetCdmId() const {
   return cdm_id_;
 }
 
-void ProxyMediaKeys::OnSessionCreated(uint32 session_id,
-                                      const std::string& web_session_id) {
-  AssignWebSessionId(session_id, web_session_id);
-  scoped_ptr<media::CdmPromise> promise = TakePromise(session_id);
-  if (promise) {
-    media::NewSessionCdmPromise* session_promise(
-        static_cast<media::NewSessionCdmPromise*>(promise.get()));
-    session_promise->resolve(web_session_id);
-  }
+void ProxyMediaKeys::OnSessionMessage(const std::string& session_id,
+                                      const std::vector<uint8>& message,
+                                      const GURL& destination_url) {
+  session_message_cb_.Run(session_id, message, destination_url);
 }
 
-void ProxyMediaKeys::OnSessionMessage(uint32 session_id,
-                                      const std::vector<uint8>& message,
-                                      const GURL& destination_url) {
-  session_message_cb_.Run(
-      LookupWebSessionId(session_id), message, destination_url);
+void ProxyMediaKeys::OnSessionClosed(const std::string& session_id) {
+  session_closed_cb_.Run(session_id);
 }
 
-void ProxyMediaKeys::OnSessionReady(uint32 session_id) {
-  scoped_ptr<media::CdmPromise> promise = TakePromise(session_id);
-  if (promise) {
-    media::SimpleCdmPromise* simple_promise(
-        static_cast<media::SimpleCdmPromise*>(promise.get()));
-    simple_promise->resolve();
-  }
+void ProxyMediaKeys::OnSessionError(const std::string& session_id,
+                                    media::MediaKeys::Exception exception,
+                                    uint32 system_code,
+                                    const std::string& error_message) {
+  session_error_cb_.Run(session_id, exception, system_code, error_message);
 }
 
-void ProxyMediaKeys::OnSessionClosed(uint32 session_id) {
-  const std::string web_session_id = LookupWebSessionId(session_id);
-  DropWebSessionId(web_session_id);
-  scoped_ptr<media::CdmPromise> promise = TakePromise(session_id);
-  if (promise) {
-    media::SimpleCdmPromise* simple_promise(
-        static_cast<media::SimpleCdmPromise*>(promise.get()));
-    simple_promise->resolve();
-  } else {
-    // It is possible for the CDM to close a session independent of a
-    // Release() request.
-    session_closed_cb_.Run(web_session_id);
-  }
+void ProxyMediaKeys::OnSessionKeysChange(const std::string& session_id,
+                                         bool has_additional_usable_key,
+                                         media::CdmKeysInfo keys_info) {
+  session_keys_change_cb_.Run(session_id, has_additional_usable_key,
+                              keys_info.Pass());
 }
 
-void ProxyMediaKeys::OnSessionError(uint32 session_id,
-                                    media::MediaKeys::KeyError error_code,
-                                    uint32 system_code) {
-  const std::string web_session_id = LookupWebSessionId(session_id);
-  media::MediaKeys::Exception exception_code;
-  switch (error_code) {
-    case media::MediaKeys::kClientError:
-      exception_code = media::MediaKeys::CLIENT_ERROR;
-      break;
-    case media::MediaKeys::kOutputError:
-      exception_code = media::MediaKeys::OUTPUT_ERROR;
-      break;
-    case media::MediaKeys::kUnknownError:
-    default:
-      exception_code = media::MediaKeys::UNKNOWN_ERROR;
-      break;
-  }
+void ProxyMediaKeys::OnSessionExpirationUpdate(
+    const std::string& session_id,
+    const base::Time& new_expiry_time) {
+  session_expiration_update_cb_.Run(session_id, new_expiry_time);
+}
 
-  scoped_ptr<media::CdmPromise> promise = TakePromise(session_id);
-  if (promise) {
-    promise->reject(exception_code, system_code, std::string());
-    return;
-  }
+void ProxyMediaKeys::OnPromiseResolved(uint32_t promise_id) {
+  cdm_promise_adapter_.ResolvePromise(promise_id);
+}
 
-  // Errors generally happen in response to a request, but it is possible
-  // for something bad to happen in the CDM and it needs to tell the client.
-  session_error_cb_.Run(
-      web_session_id, exception_code, system_code, std::string());
+void ProxyMediaKeys::OnPromiseResolvedWithSession(
+    uint32_t promise_id,
+    const std::string& session_id) {
+  cdm_promise_adapter_.ResolvePromise(promise_id, session_id);
+}
+
+void ProxyMediaKeys::OnPromiseRejected(uint32_t promise_id,
+                                       media::MediaKeys::Exception exception,
+                                       uint32_t system_code,
+                                       const std::string& error_message) {
+  cdm_promise_adapter_.RejectPromise(promise_id, exception, system_code,
+                                     error_message);
 }
 
 ProxyMediaKeys::ProxyMediaKeys(
     RendererCdmManager* manager,
     const media::SessionMessageCB& session_message_cb,
     const media::SessionClosedCB& session_closed_cb,
-    const media::SessionErrorCB& session_error_cb)
+    const media::SessionErrorCB& session_error_cb,
+    const media::SessionKeysChangeCB& session_keys_change_cb,
+    const media::SessionExpirationUpdateCB& session_expiration_update_cb)
     : manager_(manager),
       session_message_cb_(session_message_cb),
       session_closed_cb_(session_closed_cb),
       session_error_cb_(session_error_cb),
-      next_session_id_(1) {
+      session_keys_change_cb_(session_keys_change_cb),
+      session_expiration_update_cb_(session_expiration_update_cb) {
   cdm_id_ = manager->RegisterMediaKeys(this);
 }
 
 void ProxyMediaKeys::InitializeCdm(const std::string& key_system,
                                    const GURL& security_origin) {
   manager_->InitializeCdm(cdm_id_, this, key_system, security_origin);
 }
 
-uint32_t ProxyMediaKeys::CreateSessionId() {
-  return next_session_id_++;
-}
-
-void ProxyMediaKeys::AssignWebSessionId(uint32_t session_id,
-                                        const std::string& web_session_id) {
-  DCHECK(!ContainsKey(web_session_to_session_id_map_, web_session_id));
-  DCHECK(session_id);
-  web_session_to_session_id_map_.insert(
-      std::make_pair(web_session_id, session_id));
-}
-
-uint32_t ProxyMediaKeys::LookupSessionId(
-    const std::string& web_session_id) const {
-  SessionIdMap::const_iterator it =
-      web_session_to_session_id_map_.find(web_session_id);
-  return (it != web_session_to_session_id_map_.end()) ? it->second : 0;
-}
-
-std::string ProxyMediaKeys::LookupWebSessionId(uint32_t session_id) const {
-  for (SessionIdMap::const_iterator it = web_session_to_session_id_map_.begin();
-       it != web_session_to_session_id_map_.end();
-       ++it) {
-    if (it->second == session_id)
-      return it->first;
-  }
-  // Possible to get an error creating a session, so no |web_session_id|
-  // available.
-  return std::string();
-}
-
-void ProxyMediaKeys::DropWebSessionId(const std::string& web_session_id) {
-  web_session_to_session_id_map_.erase(web_session_id);
-}
-
-void ProxyMediaKeys::SavePromise(uint32_t session_id,
-                                 scoped_ptr<media::CdmPromise> promise) {
-  // Should only be one promise outstanding for any |session_id|.
-  DCHECK(!ContainsKey(session_id_to_promise_map_, session_id));
-  session_id_to_promise_map_.add(session_id, promise.Pass());
-}
-
-scoped_ptr<media::CdmPromise> ProxyMediaKeys::TakePromise(uint32_t session_id) {
-  PromiseMap::iterator it = session_id_to_promise_map_.find(session_id);
-  // May not be a promise associated with this session for asynchronous events.
-  if (it == session_id_to_promise_map_.end())
-    return scoped_ptr<media::CdmPromise>();
-  return session_id_to_promise_map_.take_and_erase(it);
-}
-
 }  // namespace content