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-rw-r--r--dom/media/MediaDecoderReaderWrapper.h143
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diff --git a/dom/media/MediaDecoderReaderWrapper.h b/dom/media/MediaDecoderReaderWrapper.h
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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 MediaDecoderReaderWrapper_h_
+#define MediaDecoderReaderWrapper_h_
+
+#include "mozilla/AbstractThread.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/Variant.h"
+#include "nsISupportsImpl.h"
+
+#include "MediaDecoderReader.h"
+#include "MediaEventSource.h"
+
+namespace mozilla {
+
+class StartTimeRendezvous;
+
+typedef MozPromise<bool, bool, /* isExclusive = */ false> HaveStartTimePromise;
+
+typedef Variant<MediaData*, MediaResult> AudioCallbackData;
+typedef Variant<Tuple<MediaData*, TimeStamp>, MediaResult> VideoCallbackData;
+typedef Variant<MediaData::Type, WaitForDataRejectValue> WaitCallbackData;
+
+/**
+ * A wrapper around MediaDecoderReader 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 MediaDecoderReaderWrapper {
+ typedef MediaDecoderReader::MetadataPromise MetadataPromise;
+ typedef MediaDecoderReader::MediaDataPromise MediaDataPromise;
+ typedef MediaDecoderReader::SeekPromise SeekPromise;
+ typedef MediaDecoderReader::WaitForDataPromise WaitForDataPromise;
+ typedef MediaDecoderReader::BufferedUpdatePromise BufferedUpdatePromise;
+ typedef MediaDecoderReader::TrackSet TrackSet;
+ NS_INLINE_DECL_THREADSAFE_REFCOUNTING(MediaDecoderReaderWrapper);
+
+private:
+ MediaCallbackExc<AudioCallbackData> mAudioCallback;
+ MediaCallbackExc<VideoCallbackData> mVideoCallback;
+ MediaCallbackExc<WaitCallbackData> mAudioWaitCallback;
+ MediaCallbackExc<WaitCallbackData> mVideoWaitCallback;
+
+public:
+ MediaDecoderReaderWrapper(AbstractThread* aOwnerThread,
+ MediaDecoderReader* aReader);
+
+ media::TimeUnit StartTime() const;
+ RefPtr<MetadataPromise> ReadMetadata();
+ RefPtr<HaveStartTimePromise> AwaitStartTime();
+
+ decltype(mAudioCallback)& AudioCallback() { return mAudioCallback; }
+ decltype(mVideoCallback)& VideoCallback() { return mVideoCallback; }
+ decltype(mAudioWaitCallback)& AudioWaitCallback() { return mAudioWaitCallback; }
+ decltype(mVideoWaitCallback)& VideoWaitCallback() { return mVideoWaitCallback; }
+
+ // NOTE: please set callbacks before requesting audio/video data!
+ void RequestAudioData();
+ void RequestVideoData(bool aSkipToNextKeyframe, media::TimeUnit aTimeThreshold);
+
+ // NOTE: please set callbacks before invoking WaitForData()!
+ void WaitForData(MediaData::Type aType);
+
+ bool IsRequestingAudioData() const;
+ bool IsRequestingVideoData() const;
+ bool IsWaitingAudioData() const;
+ bool IsWaitingVideoData() const;
+
+ RefPtr<SeekPromise> Seek(SeekTarget aTarget, media::TimeUnit aEndTime);
+ RefPtr<BufferedUpdatePromise> UpdateBufferedWithPromise();
+ RefPtr<ShutdownPromise> Shutdown();
+
+ void ReleaseResources();
+ void SetIdle();
+ void ResetDecode(TrackSet aTracks);
+
+ nsresult Init() { return mReader->Init(); }
+ bool IsWaitForDataSupported() const { return mReader->IsWaitForDataSupported(); }
+ bool IsAsync() const { return mReader->IsAsync(); }
+ bool UseBufferingHeuristics() const { return mReader->UseBufferingHeuristics(); }
+ bool ForceZeroStartTime() const { return mReader->ForceZeroStartTime(); }
+
+ bool VideoIsHardwareAccelerated() const {
+ return mReader->VideoIsHardwareAccelerated();
+ }
+ TimedMetadataEventSource& TimedMetadataEvent() {
+ return mReader->TimedMetadataEvent();
+ }
+ MediaEventSource<void>& OnMediaNotSeekable() {
+ return mReader->OnMediaNotSeekable();
+ }
+ size_t SizeOfVideoQueueInBytes() const {
+ return mReader->SizeOfVideoQueueInBytes();
+ }
+ size_t SizeOfAudioQueueInBytes() const {
+ return mReader->SizeOfAudioQueueInBytes();
+ }
+ 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();
+ }
+
+ void SetCDMProxy(CDMProxy* aProxy) { mReader->SetCDMProxy(aProxy); }
+
+ void SetVideoBlankDecode(bool aIsBlankDecode);
+
+private:
+ ~MediaDecoderReaderWrapper();
+
+ void OnMetadataRead(MetadataHolder* aMetadata);
+ void OnMetadataNotRead() {}
+ MediaCallbackExc<WaitCallbackData>& WaitCallbackRef(MediaData::Type aType);
+ MozPromiseRequestHolder<WaitForDataPromise>& WaitRequestRef(MediaData::Type aType);
+
+ const bool mForceZeroStartTime;
+ const RefPtr<AbstractThread> mOwnerThread;
+ const RefPtr<MediaDecoderReader> mReader;
+
+ bool mShutdown = false;
+ RefPtr<StartTimeRendezvous> mStartTimeRendezvous;
+
+ MozPromiseRequestHolder<MediaDataPromise> mAudioDataRequest;
+ MozPromiseRequestHolder<MediaDataPromise> mVideoDataRequest;
+ MozPromiseRequestHolder<WaitForDataPromise> mAudioWaitRequest;
+ MozPromiseRequestHolder<WaitForDataPromise> mVideoWaitRequest;
+};
+
+} // namespace mozilla
+
+#endif // MediaDecoderReaderWrapper_h_