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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 "media/base/cdm_promise_adapter.h"
#include <utility>
#include "media/base/media_keys.h"
namespace media {
CdmPromiseAdapter::CdmPromiseAdapter() : next_promise_id_(1) {
}
CdmPromiseAdapter::~CdmPromiseAdapter() {
DCHECK(promises_.empty());
DCHECK(thread_checker_.CalledOnValidThread());
Clear();
}
uint32_t CdmPromiseAdapter::SavePromise(scoped_ptr<CdmPromise> promise) {
DCHECK(thread_checker_.CalledOnValidThread());
uint32_t promise_id = next_promise_id_++;
promises_.add(promise_id, std::move(promise));
return promise_id;
}
template <typename... T>
void CdmPromiseAdapter::ResolvePromise(uint32_t promise_id,
const T&... result) {
scoped_ptr<CdmPromise> promise = TakePromise(promise_id);
if (!promise) {
NOTREACHED() << "Promise not found for " << promise_id;
return;
}
// Sanity check the type before we do static_cast.
CdmPromise::ResolveParameterType type = promise->GetResolveParameterType();
CdmPromise::ResolveParameterType expected = CdmPromiseTraits<T...>::kType;
if (type != expected) {
NOTREACHED() << "Promise type mismatch: " << type << " vs " << expected;
return;
}
static_cast<CdmPromiseTemplate<T...>*>(promise.get())->resolve(result...);
}
void CdmPromiseAdapter::RejectPromise(uint32_t promise_id,
MediaKeys::Exception exception_code,
uint32_t system_code,
const std::string& error_message) {
scoped_ptr<CdmPromise> promise = TakePromise(promise_id);
if (!promise) {
NOTREACHED() << "No promise found for promise_id " << promise_id;
return;
}
promise->reject(exception_code, system_code, error_message);
}
void CdmPromiseAdapter::Clear() {
// Reject all outstanding promises.
DCHECK(thread_checker_.CalledOnValidThread());
for (auto& promise : promises_)
promise.second->reject(MediaKeys::UNKNOWN_ERROR, 0, "Operation aborted.");
promises_.clear();
}
scoped_ptr<CdmPromise> CdmPromiseAdapter::TakePromise(uint32_t promise_id) {
DCHECK(thread_checker_.CalledOnValidThread());
PromiseMap::iterator it = promises_.find(promise_id);
if (it == promises_.end())
return nullptr;
return promises_.take_and_erase(it);
}
// Explicit instantiation of function templates.
template MEDIA_EXPORT void CdmPromiseAdapter::ResolvePromise(uint32_t);
template MEDIA_EXPORT void CdmPromiseAdapter::ResolvePromise(
uint32_t,
const std::string&);
} // namespace media
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