media: Support unprefixed EME API on Android.

media/base/android/media_drm_bridge.cc

 // Copyright (c) 2013 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/android/media_drm_bridge.h"
 
 #include <algorithm>
 
 #include "base/android/build_info.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/callback_helpers.h"
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/strings/string_util.h"
 #include "base/sys_byteorder.h"
 #include "base/sys_info.h"
 #include "jni/MediaDrmBridge_jni.h"
+#include "media/base/cdm_key_information.h"
 
 #include "widevine_cdm_version.h"  // In SHARED_INTERMEDIATE_DIR.
 
 using base::android::AttachCurrentThread;
 using base::android::ConvertUTF8ToJavaString;
 using base::android::ConvertJavaStringToUTF8;
 using base::android::JavaByteArrayToByteVector;
 using base::android::ScopedJavaLocalRef;
 
 namespace media {
@@ skipping 29 matching lines @@
 const int kBoxLargeSizeSize = 8;
 const int kPsshVersionFlagSize = 4;
 const int kPsshSystemIdSize = 16;
 const int kPsshDataSizeSize = 4;
 const uint32 kTencType = 0x74656e63;
 const uint32 kPsshType = 0x70737368;
 const uint8 kWidevineUuid[16] = {
     0xED, 0xEF, 0x8B, 0xA9, 0x79, 0xD6, 0x4A, 0xCE,
     0xA3, 0xC8, 0x27, 0xDC, 0xD5, 0x1D, 0x21, 0xED };
 
+// DrmBridge supports session expiration event but doesn't provide detailed
+// status for each key ID, which is required by the EME spec. Use a dummy key ID
+// here to report session expiration info.
+const char kDummyKeyId[] = "Dummy Key Id";
+
 typedef std::vector<uint8> UUID;
 
 class KeySystemUuidManager {
  public:
   KeySystemUuidManager();
   UUID GetUUID(const std::string& key_system);
   void AddMapping(const std::string& key_system, const UUID& uuid);
   std::vector<std::string> GetPlatformKeySystemNames();
 
  private:
@@ skipping 165 matching lines @@
 
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jbyteArray> j_scheme_uuid =
       base::android::ToJavaByteArray(env, &scheme_uuid[0], scheme_uuid.size());
   ScopedJavaLocalRef<jstring> j_container_mime_type =
       ConvertUTF8ToJavaString(env, container_mime_type);
   return Java_MediaDrmBridge_isCryptoSchemeSupported(
       env, j_scheme_uuid.obj(), j_container_mime_type.obj());
 }
 
+// Returns string session ID from jbyteArray (byte[] in Java).
+static std::string GetSessionId(JNIEnv* env, jbyteArray j_session_id) {
+  std::vector<uint8> session_id_vector;
+  JavaByteArrayToByteVector(env, j_session_id, &session_id_vector);
+  return std::string(session_id_vector.begin(), session_id_vector.end());
+}
+
+// Similar to string_as_array() in stl_util.h. Cannot use string_as_array()
+// directly because we are dealing with const strings.
+static const uint8_t* StringAsArray(const std::string& str) {
+  return str.empty() ? nullptr
+                     : reinterpret_cast<const uint8_t*>(&*str.begin());

[jrummell, 2015/01/15 18:56:23]

std::string has const char* data() const; Can you not use it here, since it's
been around for a while (before C++11).

[xhwang, 2015/01/15 19:37:26]

Good point. I thought this would avoid a possible data copy in data(), but now I
think it's premature optimization. Done.

+}
+
 // static
 bool MediaDrmBridge::IsAvailable() {
   if (base::android::BuildInfo::GetInstance()->sdk_int() < 19)
     return false;
 
   int32 os_major_version = 0;
   int32 os_minor_version = 0;
   int32 os_bugfix_version = 0;
   base::SysInfo::OperatingSystemVersionNumbers(&os_major_version,
                                                &os_minor_version,
@@ skipping 49 matching lines @@
     const std::string& key_system,
     const std::string& container_mime_type) {
   DCHECK(!key_system.empty() && !container_mime_type.empty());
   return IsKeySystemSupportedWithTypeImpl(key_system, container_mime_type);
 }
 
 bool MediaDrmBridge::RegisterMediaDrmBridge(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
-MediaDrmBridge::MediaDrmBridge(const std::vector<uint8>& scheme_uuid,
-                               const SessionCreatedCB& session_created_cb,
-                               const SessionMessageCB& session_message_cb,
-                               const SessionReadyCB& session_ready_cb,
-                               const SessionClosedCB& session_closed_cb,
-                               const SessionErrorCB& session_error_cb)
+MediaDrmBridge::MediaDrmBridge(
+    const std::vector<uint8>& scheme_uuid,
+    const SessionMessageCB& session_message_cb,
+    const SessionClosedCB& session_closed_cb,
+    const SessionErrorCB& session_error_cb,
+    const SessionKeysChangeCB& session_keys_change_cb)
     : scheme_uuid_(scheme_uuid),
-      session_created_cb_(session_created_cb),
       session_message_cb_(session_message_cb),
-      session_ready_cb_(session_ready_cb),
       session_closed_cb_(session_closed_cb),
-      session_error_cb_(session_error_cb) {
+      session_error_cb_(session_error_cb),
+      session_keys_change_cb_(session_keys_change_cb) {
   JNIEnv* env = AttachCurrentThread();
   CHECK(env);
 
   ScopedJavaLocalRef<jbyteArray> j_scheme_uuid =
       base::android::ToJavaByteArray(env, &scheme_uuid[0], scheme_uuid.size());
   j_media_drm_.Reset(Java_MediaDrmBridge_create(
       env, j_scheme_uuid.obj(), reinterpret_cast<intptr_t>(this)));
 }
 
 MediaDrmBridge::~MediaDrmBridge() {
   JNIEnv* env = AttachCurrentThread();
   player_tracker_.NotifyCdmUnset();
   if (!j_media_drm_.is_null())
     Java_MediaDrmBridge_release(env, j_media_drm_.obj());
 }
 
 // static
+// TODO(xhwang): Enable SessionExpirationUpdateCB when it is supported.
 scoped_ptr<MediaDrmBridge> MediaDrmBridge::Create(
     const std::string& key_system,
-    const SessionCreatedCB& session_created_cb,
     const SessionMessageCB& session_message_cb,
-    const SessionReadyCB& session_ready_cb,
     const SessionClosedCB& session_closed_cb,
-    const SessionErrorCB& session_error_cb) {
+    const SessionErrorCB& session_error_cb,
+    const SessionKeysChangeCB& session_keys_change_cb,
+    const SessionExpirationUpdateCB& /* session_expiration_update_cb */) {
   scoped_ptr<MediaDrmBridge> media_drm_bridge;
   if (!IsAvailable())
     return media_drm_bridge.Pass();
 
   UUID scheme_uuid = g_key_system_uuid_manager.Get().GetUUID(key_system);
   if (scheme_uuid.empty())
     return media_drm_bridge.Pass();
 
-  media_drm_bridge.reset(new MediaDrmBridge(scheme_uuid,
-                                            session_created_cb,
-                                            session_message_cb,
-                                            session_ready_cb,
-                                            session_closed_cb,
-                                            session_error_cb));
+  media_drm_bridge.reset(new MediaDrmBridge(scheme_uuid, session_message_cb,
+                                            session_closed_cb, session_error_cb,
+                                            session_keys_change_cb));
 
   if (media_drm_bridge->j_media_drm_.is_null())
     media_drm_bridge.reset();
 
   return media_drm_bridge.Pass();
 }
 
 // static
 scoped_ptr<MediaDrmBridge> MediaDrmBridge::CreateSessionless(

[jrummell, 2015/01/15 18:56:23]

less? Is this just the old code needed a different name since CreateSession()
was already used?

[xhwang, 2015/01/15 19:37:26]

lol, I agree this name is confusing. Changed to CreateWithoutSessionSupport.

     const std::string& key_system) {
-  return MediaDrmBridge::Create(key_system,
-                                SessionCreatedCB(),
-                                SessionMessageCB(),
-                                SessionReadyCB(),
-                                SessionClosedCB(),
-                                SessionErrorCB());
+  return MediaDrmBridge::Create(
+      key_system, SessionMessageCB(), SessionClosedCB(), SessionErrorCB(),
+      SessionKeysChangeCB(), SessionExpirationUpdateCB());
 }
 
 bool MediaDrmBridge::SetSecurityLevel(SecurityLevel security_level) {
   JNIEnv* env = AttachCurrentThread();
 
   std::string security_level_str = GetSecurityLevelString(security_level);
   if (security_level_str.empty())
     return false;
 
   ScopedJavaLocalRef<jstring> j_security_level =
       ConvertUTF8ToJavaString(env, security_level_str);
   return Java_MediaDrmBridge_setSecurityLevel(
       env, j_media_drm_.obj(), j_security_level.obj());
 }
 
-bool MediaDrmBridge::CreateSession(uint32 session_id,
-                                   const std::string& content_type,
-                                   const uint8* init_data,
-                                   int init_data_length) {
+void MediaDrmBridge::SetServerCertificate(
+    const uint8* certificate_data,
+    int certificate_data_length,
+    scoped_ptr<media::SimpleCdmPromise> promise) {
+  promise->reject(NOT_SUPPORTED_ERROR, 0,
+                  "SetServerCertificate() is not supported.");
+}
+
+void MediaDrmBridge::CreateSessionAndGenerateRequest(
+    SessionType session_type,
+    const std::string& init_data_type,
+    const uint8* init_data,
+    int init_data_length,
+    scoped_ptr<media::NewSessionCdmPromise> promise) {
   DVLOG(1) << __FUNCTION__;
 
-  DCHECK(!session_created_cb_.is_null())
-      << "CreateSession called on a sessionless MediaDrmBridge object.";
+  if (session_type != media::MediaKeys::TEMPORARY_SESSION) {
+    promise->reject(NOT_SUPPORTED_ERROR, 0,
+                    "Only temporary session is supported.");

[ddorwin, 2015/01/15 17:36:52]

ditto

[xhwang, 2015/01/15 19:03:44]

Done.

+    return;
+  }
 
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jbyteArray> j_init_data;
   // Caller should always use "video/*" content types.
-  DCHECK_EQ(0u, content_type.find("video/"));
+  DCHECK_EQ(0u, init_data_type.find("video/"));
 
   // Widevine MediaDrm plugin only accepts the "data" part of the PSSH box as
   // the init data when using MP4 container.
   if (std::equal(scheme_uuid_.begin(), scheme_uuid_.end(), kWidevineUuid) &&
-      content_type == "video/mp4") {
+      init_data_type == "video/mp4") {
     std::vector<uint8> pssh_data;
-    if (!GetPsshData(init_data, init_data_length, scheme_uuid_, &pssh_data))
-      return false;
+    if (!GetPsshData(init_data, init_data_length, scheme_uuid_, &pssh_data)) {
+      promise->reject(INVALID_ACCESS_ERROR, 0, "Invalid PSSH data.");
+      return;
+    }
     j_init_data =
         base::android::ToJavaByteArray(env, &pssh_data[0], pssh_data.size());
   } else {
     j_init_data =
         base::android::ToJavaByteArray(env, init_data, init_data_length);
   }
 
   ScopedJavaLocalRef<jstring> j_mime =
-      ConvertUTF8ToJavaString(env, content_type);
-  Java_MediaDrmBridge_createSession(
-      env, j_media_drm_.obj(), session_id, j_init_data.obj(), j_mime.obj());
-  return true;
+      ConvertUTF8ToJavaString(env, init_data_type);
+  uint32_t promise_id = cdm_promise_adapter_.SavePromise(promise.Pass());
+  Java_MediaDrmBridge_createSession(env, j_media_drm_.obj(), j_init_data.obj(),
+                                    j_mime.obj(), promise_id);
 }
 
-void MediaDrmBridge::LoadSession(uint32 session_id,
-                                 const std::string& web_session_id) {
-  // MediaDrmBridge doesn't support loading sessions.
-  NOTREACHED();
+void MediaDrmBridge::LoadSession(
+    SessionType session_type,
+    const std::string& session_id,
+    scoped_ptr<media::NewSessionCdmPromise> promise) {
+  NOTREACHED() << "Persistent session not supported";
+  promise->reject(NOT_SUPPORTED_ERROR, 0, "LoadSession() is not supported.");

[qinmin, 2015/01/15 18:17:25]

do we need this if it is NOTREACHED?

[xhwang, 2015/01/15 19:03:44]

When we use MediaDrmBridge with mojo, we need to reject the promise. I'll drop
the NOTREACHED() check to be consistent.

 }
 
-void MediaDrmBridge::UpdateSession(uint32 session_id,
-                                   const uint8* response,
-                                   int response_length) {
+void MediaDrmBridge::UpdateSession(
+    const std::string& session_id,
+    const uint8* response,
+    int response_length,
+    scoped_ptr<media::SimpleCdmPromise> promise) {
   DVLOG(1) << __FUNCTION__;
 
-  DCHECK(!session_ready_cb_.is_null())
-      << __FUNCTION__ << " called on a sessionless MediaDrmBridge object.";
-
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jbyteArray> j_response =
       base::android::ToJavaByteArray(env, response, response_length);
-  Java_MediaDrmBridge_updateSession(
-      env, j_media_drm_.obj(), session_id, j_response.obj());
+  ScopedJavaLocalRef<jbyteArray> j_session_id = base::android::ToJavaByteArray(
+      env, StringAsArray(session_id), session_id.size());
+  uint32_t promise_id = cdm_promise_adapter_.SavePromise(promise.Pass());
+  Java_MediaDrmBridge_updateSession(env, j_media_drm_.obj(), j_session_id.obj(),
+                                    j_response.obj(), promise_id);
 }
 
-void MediaDrmBridge::ReleaseSession(uint32 session_id) {
+void MediaDrmBridge::CloseSession(const std::string& session_id,
+                                  scoped_ptr<media::SimpleCdmPromise> promise) {
   DVLOG(1) << __FUNCTION__;
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jbyteArray> j_session_id = base::android::ToJavaByteArray(
+      env, StringAsArray(session_id), session_id.size());
+  uint32_t promise_id = cdm_promise_adapter_.SavePromise(promise.Pass());
+  Java_MediaDrmBridge_closeSession(env, j_media_drm_.obj(), j_session_id.obj(),
+                                   promise_id);
+}
 
-  DCHECK(!session_closed_cb_.is_null())
-      << __FUNCTION__ << " called on a sessionless MediaDrmBridge object.";
+void MediaDrmBridge::RemoveSession(
+    const std::string& session_id,
+    scoped_ptr<media::SimpleCdmPromise> promise) {
+  NOTREACHED() << "Persistent session not supported.";
+  promise->reject(NOT_SUPPORTED_ERROR, 0, "RemoveSession() is not supported.");

[qinmin, 2015/01/15 18:17:25]

ditto

[xhwang, 2015/01/15 19:03:44]

ditto

+}
 
-  JNIEnv* env = AttachCurrentThread();
-  Java_MediaDrmBridge_releaseSession(env, j_media_drm_.obj(), session_id);
+CdmContext* MediaDrmBridge::GetCdmContext() {
+  NOTREACHED();
+  return nullptr;
 }
 
 int MediaDrmBridge::RegisterPlayer(const base::Closure& new_key_cb,
                                    const base::Closure& cdm_unset_cb) {
   return player_tracker_.RegisterPlayer(new_key_cb, cdm_unset_cb);
 }
 
 void MediaDrmBridge::UnregisterPlayer(int registration_id) {
   player_tracker_.UnregisterPlayer(registration_id);
 }
@@ skipping 13 matching lines @@
 
   media_crypto_ready_cb_ = closure;
 }
 
 void MediaDrmBridge::OnMediaCryptoReady(JNIEnv* env, jobject) {
   DCHECK(!GetMediaCrypto().is_null());
   if (!media_crypto_ready_cb_.is_null())
     base::ResetAndReturn(&media_crypto_ready_cb_).Run();
 }
 
-void MediaDrmBridge::OnSessionCreated(JNIEnv* env,
-                                      jobject j_media_drm,
-                                      jint j_session_id,
-                                      jstring j_web_session_id) {
-  uint32 session_id = j_session_id;
-  std::string web_session_id = ConvertJavaStringToUTF8(env, j_web_session_id);
-  session_created_cb_.Run(session_id, web_session_id);
+void MediaDrmBridge::OnPromiseResolved(JNIEnv* env,
+                                       jobject j_media_drm,
+                                       jint j_promise_id) {
+  cdm_promise_adapter_.ResolvePromise(j_promise_id);
+}
+
+void MediaDrmBridge::OnPromiseResolvedWithSession(JNIEnv* env,
+                                                  jobject j_media_drm,
+                                                  jint j_promise_id,
+                                                  jbyteArray j_session_id) {
+  cdm_promise_adapter_.ResolvePromise(j_promise_id,
+                                      GetSessionId(env, j_session_id));
+}
+
+void MediaDrmBridge::OnPromiseRejected(JNIEnv* env,
+                                       jobject j_media_drm,
+                                       jint j_promise_id,
+                                       jstring j_error_message) {
+  std::string error_message = ConvertJavaStringToUTF8(env, j_error_message);
+  cdm_promise_adapter_.RejectPromise(j_promise_id, MediaKeys::UNKNOWN_ERROR, 0,
+                                     error_message);
 }
 
 void MediaDrmBridge::OnSessionMessage(JNIEnv* env,
                                       jobject j_media_drm,
-                                      jint j_session_id,
+                                      jbyteArray j_session_id,
                                       jbyteArray j_message,
-                                      jstring j_destination_url) {
-  uint32 session_id = j_session_id;
+                                      jstring j_legacy_destination_url) {
   std::vector<uint8> message;
   JavaByteArrayToByteVector(env, j_message, &message);
-  GURL destination_gurl = GURL(ConvertJavaStringToUTF8(env, j_destination_url));
-  if (!destination_gurl.is_valid() && !destination_gurl.is_empty()) {
-    DLOG(WARNING) << "SessionMessage destination_url is invalid : "
-                  << destination_gurl.possibly_invalid_spec();
-    destination_gurl = GURL::EmptyGURL();  // Replace invalid destination_url.
-  }
-  session_message_cb_.Run(session_id, message, destination_gurl);
-}
+  GURL legacy_destination_url =
+      GURL(ConvertJavaStringToUTF8(env, j_legacy_destination_url));
+  // Note: Message type is not supported in MediaDrm. Do our best guess here.
+  media::MediaKeys::MessageType message_type =
+      legacy_destination_url.is_empty() ? media::MediaKeys::LICENSE_REQUEST
+                                        : media::MediaKeys::LICENSE_RENEWAL;
 
-void MediaDrmBridge::OnSessionReady(JNIEnv* env,
-                                    jobject j_media_drm,
-                                    jint j_session_id) {
-  uint32 session_id = j_session_id;
-  session_ready_cb_.Run(session_id);
-  // TODO(xhwang/jrummell): Move this when usableKeyIds/keyschange are
-  // implemented.
-  player_tracker_.NotifyNewKey();
+  session_message_cb_.Run(GetSessionId(env, j_session_id), message_type,
+                          message, legacy_destination_url);
 }
 
 void MediaDrmBridge::OnSessionClosed(JNIEnv* env,
                                      jobject j_media_drm,
-                                     jint j_session_id) {
-  uint32 session_id = j_session_id;
-  session_closed_cb_.Run(session_id);
+                                     jbyteArray j_session_id) {
+  session_closed_cb_.Run(GetSessionId(env, j_session_id));
 }
 
-void MediaDrmBridge::OnSessionError(JNIEnv* env,
-                                    jobject j_media_drm,
-                                    jint j_session_id) {
-  uint32 session_id = j_session_id;
-  session_error_cb_.Run(session_id, MediaKeys::kUnknownError, 0);
+void MediaDrmBridge::OnSessionKeysChange(JNIEnv* env,
+                                         jobject j_media_drm,
+                                         jbyteArray j_session_id,
+                                         bool has_additional_usable_key,
+                                         jint j_key_status) {
+  if (has_additional_usable_key)
+    player_tracker_.NotifyNewKey();
+
+  scoped_ptr<CdmKeyInformation> cdm_key_information(new CdmKeyInformation());
+  cdm_key_information->key_id.assign(kDummyKeyId,
+                                     kDummyKeyId + sizeof(kDummyKeyId));
+  cdm_key_information->status =
+      static_cast<CdmKeyInformation::KeyStatus>(j_key_status);
+  CdmKeysInfo cdm_keys_info;
+  cdm_keys_info.push_back(cdm_key_information.release());
+
+  session_keys_change_cb_.Run(GetSessionId(env, j_session_id),
+                              has_additional_usable_key, cdm_keys_info.Pass());
+}
+
+void MediaDrmBridge::OnLegacySessionError(JNIEnv* env,
+                                          jobject j_media_drm,
+                                          jbyteArray j_session_id,
+                                          jstring j_error_message) {
+  std::string error_message = ConvertJavaStringToUTF8(env, j_error_message);
+  session_error_cb_.Run(GetSessionId(env, j_session_id),
+                        MediaKeys::UNKNOWN_ERROR, 0, error_message);
 }
 
 ScopedJavaLocalRef<jobject> MediaDrmBridge::GetMediaCrypto() {
   JNIEnv* env = AttachCurrentThread();
   return Java_MediaDrmBridge_getMediaCrypto(env, j_media_drm_.obj());
 }
 
 MediaDrmBridge::SecurityLevel MediaDrmBridge::GetSecurityLevel() {
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jstring> j_security_level =
@@ skipping 14 matching lines @@
   JNIEnv* env = AttachCurrentThread();
   Java_MediaDrmBridge_resetDeviceCredentials(env, j_media_drm_.obj());
 }
 
 void MediaDrmBridge::OnResetDeviceCredentialsCompleted(
     JNIEnv* env, jobject, bool success) {
   base::ResetAndReturn(&reset_credentials_cb_).Run(success);
 }
 
 }  // namespace media