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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef SamplesWaitingForKey_h_
#define SamplesWaitingForKey_h_
#include <functional>
#include "MediaInfo.h"
#include "mozilla/MozPromise.h"
#include "mozilla/Mutex.h"
#include "mozilla/RefPtr.h"
namespace mozilla {
typedef nsTArray<uint8_t> CencKeyId;
class CDMProxy;
template <typename... Es>
class MediaEventProducer;
class MediaRawData;
// Encapsulates the task of waiting for the CDMProxy to have the necessary
// keys to decrypt a given sample.
class SamplesWaitingForKey {
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SamplesWaitingForKey)
typedef MozPromise<RefPtr<MediaRawData>, bool, /* IsExclusive = */ true>
WaitForKeyPromise;
SamplesWaitingForKey(
CDMProxy* aProxy, TrackInfo::TrackType aType,
const std::function<MediaEventProducer<TrackInfo::TrackType>*()>&
aOnWaitingForKeyEvent);
// Returns a promise that will be resolved if or when a key for decoding the
// sample becomes usable.
RefPtr<WaitForKeyPromise> WaitIfKeyNotUsable(MediaRawData* aSample);
void NotifyUsable(const CencKeyId& aKeyId);
void Flush();
void BreakCycles();
protected:
~SamplesWaitingForKey();
private:
Mutex mMutex MOZ_UNANNOTATED;
RefPtr<CDMProxy> mProxy;
struct SampleEntry {
RefPtr<MediaRawData> mSample;
MozPromiseHolder<WaitForKeyPromise> mPromise;
};
nsTArray<SampleEntry> mSamples;
const TrackInfo::TrackType mType;
const std::function<MediaEventProducer<TrackInfo::TrackType>*()>
mOnWaitingForKeyEvent;
};
} // namespace mozilla
#endif // SamplesWaitingForKey_h_
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