| // Copyright 2018 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 MEDIA_BASE_WAITING_H_ |
| #define MEDIA_BASE_WAITING_H_ |
| |
| #include "base/callback_forward.h" |
| |
| namespace media { |
| |
| // Here "waiting" refers to the state that media pipeline stalls waiting because |
| // of some reason, e.g. no decryption key. It could cause Javascript events like |
| // "waitingforkey" [1], but not necessarily. |
| // Note: this generally does not cause the "waiting" event on HTML5 media |
| // elements [2], which is tightly related to the buffering state change (see |
| // buffering_state.h). |
| // [1] https://www.w3.org/TR/encrypted-media/#dom-evt-waitingforkey |
| // [2] |
| // https://www.w3.org/TR/html5/semantics-embedded-content.html#eventdef-media-waiting |
| |
| // TODO(xhwang): Add more waiting reasons. |
| enum class WaitingReason { |
| kNoDecryptionKey, |
| kMaxValue = kNoDecryptionKey, |
| }; |
| |
| // Callback to notify waiting state and the reason. |
| using WaitingCB = base::RepeatingCallback<void(WaitingReason)>; |
| |
| } // namespace media |
| |
| #endif // MEDIA_BASE_WAITING_H_ |
