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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 ReaderProxy_h_
+#define ReaderProxy_h_
+
+#include "mozilla/AbstractThread.h"
+#include "mozilla/RefPtr.h"
+#include "nsISupportsImpl.h"
+
+#include "MediaEventSource.h"
+#include "MediaFormatReader.h"
+#include "MediaPromiseDefs.h"
+
+namespace mozilla {
+
+/**
+ * A wrapper around MediaFormatReader to offset the timestamps of Audio/Video
+ * samples by the start time to ensure MDSM can always assume zero start time.
+ * It also adjusts the seek target passed to Seek() to ensure correct seek time
+ * is passed to the underlying reader.
+ */
+class ReaderProxy {
+ using MetadataPromise = MediaFormatReader::MetadataPromise;
+ using AudioDataPromise = MediaFormatReader::AudioDataPromise;
+ using VideoDataPromise = MediaFormatReader::VideoDataPromise;
+ using SeekPromise = MediaFormatReader::SeekPromise;
+ using WaitForDataPromise = MediaFormatReader::WaitForDataPromise;
+ using TrackSet = MediaFormatReader::TrackSet;
+ NS_INLINE_DECL_THREADSAFE_REFCOUNTING(ReaderProxy);
+
+ public:
+ ReaderProxy(AbstractThread* aOwnerThread, MediaFormatReader* aReader);
+
+ media::TimeUnit StartTime() const;
+ RefPtr<MetadataPromise> ReadMetadata();
+
+ RefPtr<AudioDataPromise> RequestAudioData();
+
+ RefPtr<VideoDataPromise> RequestVideoData(
+ const media::TimeUnit& aTimeThreshold, bool aRequestNextVideoKeyFrame);
+
+ RefPtr<WaitForDataPromise> WaitForData(MediaData::Type aType);
+
+ RefPtr<SeekPromise> Seek(const SeekTarget& aTarget);
+ RefPtr<ShutdownPromise> Shutdown();
+
+ void ReleaseResources();
+ void ResetDecode(TrackSet aTracks);
+
+ nsresult Init() { return mReader->Init(); }
+ bool UseBufferingHeuristics() const {
+ return mReader->UseBufferingHeuristics();
+ }
+
+ bool VideoIsHardwareAccelerated() const {
+ return mReader->VideoIsHardwareAccelerated();
+ }
+ TimedMetadataEventSource& TimedMetadataEvent() {
+ return mReader->TimedMetadataEvent();
+ }
+ MediaEventSource<void>& OnMediaNotSeekable() {
+ return mReader->OnMediaNotSeekable();
+ }
+ MediaEventProducer<VideoInfo, AudioInfo>& OnTrackInfoUpdatedEvent() {
+ return mReader->OnTrackInfoUpdatedEvent();
+ }
+ size_t SizeOfAudioQueueInFrames() const {
+ return mReader->SizeOfAudioQueueInFrames();
+ }
+ size_t SizeOfVideoQueueInFrames() const {
+ return mReader->SizeOfVideoQueueInFrames();
+ }
+ void ReadUpdatedMetadata(MediaInfo* aInfo) {
+ mReader->ReadUpdatedMetadata(aInfo);
+ }
+ AbstractCanonical<media::TimeIntervals>* CanonicalBuffered() {
+ return mReader->CanonicalBuffered();
+ }
+
+ RefPtr<SetCDMPromise> SetCDMProxy(CDMProxy* aProxy);
+
+ void SetVideoBlankDecode(bool aIsBlankDecode);
+
+ void SetCanonicalDuration(
+ AbstractCanonical<media::NullableTimeUnit>* aCanonical);
+
+ void UpdateMediaEngineId(uint64_t aMediaEngineId);
+
+ private:
+ ~ReaderProxy();
+ RefPtr<MetadataPromise> OnMetadataRead(MetadataHolder&& aMetadata);
+ RefPtr<MetadataPromise> OnMetadataNotRead(const MediaResult& aError);
+ void UpdateDuration();
+ RefPtr<SeekPromise> SeekInternal(const SeekTarget& aTarget);
+
+ RefPtr<ReaderProxy::AudioDataPromise> OnAudioDataRequestCompleted(
+ RefPtr<AudioData> aAudio);
+ RefPtr<ReaderProxy::AudioDataPromise> OnAudioDataRequestFailed(
+ const MediaResult& aError);
+
+ const RefPtr<AbstractThread> mOwnerThread;
+ const RefPtr<MediaFormatReader> mReader;
+
+ bool mShutdown = false;
+ Maybe<media::TimeUnit> mStartTime;
+
+ // State-watching manager.
+ WatchManager<ReaderProxy> mWatchManager;
+
+ // Duration, mirrored from the state machine task queue.
+ Mirror<media::NullableTimeUnit> mDuration;
+};
+
+} // namespace mozilla
+
+#endif // ReaderProxy_h_