| // 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 MEDIA_BASE_CDM_PROMISE_ADAPTER_H_ |
| #define MEDIA_BASE_CDM_PROMISE_ADAPTER_H_ |
| |
| #include <stdint.h> |
| |
| #include <memory> |
| #include <unordered_map> |
| |
| #include "base/macros.h" |
| #include "base/threading/thread_checker.h" |
| #include "media/base/cdm_promise.h" |
| #include "media/base/media_export.h" |
| |
| namespace media { |
| |
| // Helps convert CdmPromises to an integer identifier and vice versa. The |
| // integer identifier is needed where we cannot pass CdmPromises through, such |
| // as IPC and JNI. |
| class MEDIA_EXPORT CdmPromiseAdapter { |
| public: |
| CdmPromiseAdapter(); |
| ~CdmPromiseAdapter(); |
| |
| enum : uint32_t { kInvalidPromiseId = 0 }; |
| |
| // Takes ownership of |promise| and returns an integer promise ID. |
| uint32_t SavePromise(std::unique_ptr<media::CdmPromise> promise); |
| |
| // Takes the promise for |promise_id|, sanity checks its |type|, and resolves |
| // it with |result|. |
| template <typename... T> |
| void ResolvePromise(uint32_t promise_id, const T&... result); |
| |
| // Takes the promise for |promise_id| and rejects it with |exception_code|, |
| // |system_code| and |error_message|. |
| void RejectPromise(uint32_t promise_id, |
| CdmPromise::Exception exception_code, |
| uint32_t system_code, |
| const std::string& error_message); |
| |
| // Rejects and clears all |promises_|. |
| void Clear(); |
| |
| private: |
| // A map between promise IDs and CdmPromises. |
| using PromiseMap = std::unordered_map<uint32_t, std::unique_ptr<CdmPromise>>; |
| |
| // Finds, takes the ownership of and returns the promise for |promise_id|. |
| // Returns null if no promise can be found. |
| std::unique_ptr<CdmPromise> TakePromise(uint32_t promise_id); |
| |
| uint32_t next_promise_id_; |
| PromiseMap promises_; |
| |
| base::ThreadChecker thread_checker_; |
| DISALLOW_COPY_AND_ASSIGN(CdmPromiseAdapter); |
| }; |
| |
| } // namespace media |
| |
| #endif // MEDIA_BASE_CDM_PROMISE_ADAPTER_H_ |