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// 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 <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 {
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();
// 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_;
} // namespace media