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To batter tracking the ControlMessage logs, ConfigureMessage should generate a unique Id for itself and its following DecodeMessages and FlushMessages. Besides, that unique id can be assigned to DecoderAgent as well. As a result, it's easier to know what ConfigureMessage and DecoderAgent the DecodeMessage/FlushMessage belongs. This patch moves the id generation from DecoderAgent to ConfigureMessage so the id can be used for both of DecoderAgent and ConfigureMessage. Depends on D182124 Differential Revision: https://phabricator.services.mozilla.com/D182291
117 lines
4 KiB
C++
117 lines
4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef DOM_MEDIA_WEBCODECS_DECODERAGENT_H
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#define DOM_MEDIA_WEBCODECS_DECODERAGENT_H
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#include "MediaResult.h"
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#include "PlatformDecoderModule.h"
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#include "mozilla/RefPtr.h"
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#include "mozilla/TaskQueue.h"
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#include "mozilla/UniquePtr.h"
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class nsISerialEventTarget;
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namespace mozilla {
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class PDMFactory;
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class TrackInfo;
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namespace layers {
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class ImageContainer;
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} // namespace layers
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// DecoderAgent is a wrapper that contains a MediaDataDecoder. It adapts the
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// MediaDataDecoder APIs for use in WebCodecs.
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//
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// If Configure() is called, Shutdown() must be called to release the resources
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// gracefully. Except Shutdown(), all the methods can't be called concurrently,
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// meaning a method can only be called when the previous API call has completed.
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// The responsability of arranging the method calls is on the caller.
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//
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// When Shutdown() is called, all the operations in flight are canceled and the
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// MediaDataDecoder is shut down. On the other hand, errors are final. A new
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// DecoderAgent must be created when an error is encountered.
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//
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// All the methods need to be called on the DecoderAgent's owner thread. In
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// WebCodecs, it's either on the main thread or worker thread.
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class DecoderAgent final {
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public:
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(DecoderAgent);
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using Id = uint32_t;
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DecoderAgent(Id aId, UniquePtr<TrackInfo>&& aInfo);
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// The following APIs are owner thread only.
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using ConfigurePromise = MozPromise<bool, MediaResult, true /* exclusive */>;
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RefPtr<ConfigurePromise> Configure(bool aPreferSoftwareDecoder,
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bool aLowLatency);
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RefPtr<ShutdownPromise> Shutdown();
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using DecodePromise = MediaDataDecoder::DecodePromise;
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RefPtr<DecodePromise> Decode(MediaRawData* aSample);
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// WebCodecs's flush() flushes out all the pending decoded data in the
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// MediaDataDecoder so it is a combination of Drain and Flush. To distinguish
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// the term from MediaDataDecoder's one, we call it DrainAndFlush() here.
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RefPtr<DecodePromise> DrainAndFlush();
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const Id mId; // A unique id.
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const UniquePtr<TrackInfo> mInfo;
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private:
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~DecoderAgent();
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// Push out all the data in the MediaDataDecoder's pipeline.
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// TODO: MediaDataDecoder should implement this, instead of asking call site
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// to run `Drain` multiple times.
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RefPtr<DecodePromise> Dry();
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void DrainUntilDry();
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enum class State {
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Unconfigured,
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Configuring,
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Configured,
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Decoding,
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Flushing,
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ShuttingDown,
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Error,
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};
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void SetState(State aState);
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const RefPtr<nsISerialEventTarget> mOwnerThread;
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const RefPtr<PDMFactory> mPDMFactory;
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const RefPtr<layers::ImageContainer> mImageContainer;
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RefPtr<MediaDataDecoder> mDecoder;
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State mState;
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// Configure
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MozPromiseHolder<ConfigurePromise> mConfigurePromise;
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using CreateDecoderPromise = PlatformDecoderModule::CreateDecoderPromise;
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MozPromiseRequestHolder<CreateDecoderPromise> mCreateRequest;
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using InitPromise = MediaDataDecoder::InitPromise;
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MozPromiseRequestHolder<InitPromise> mInitRequest;
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// Shutdown
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MozPromiseHolder<ShutdownPromise> mShutdownWhileCreationPromise;
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// Decode
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MozPromiseHolder<DecodePromise> mDecodePromise;
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MozPromiseRequestHolder<DecodePromise> mDecodeRequest;
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// DrainAndFlush
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MozPromiseHolder<DecodePromise> mDrainAndFlushPromise;
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MediaDataDecoder::DecodedData mDrainAndFlushData;
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MozPromiseRequestHolder<DecodePromise> mDryRequest;
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MozPromiseHolder<DecodePromise> mDryPromise;
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MediaDataDecoder::DecodedData mDryData;
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MozPromiseRequestHolder<DecodePromise> mDrainRequest;
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using FlushPromise = MediaDataDecoder::FlushPromise;
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MozPromiseRequestHolder<FlushPromise> mFlushRequest;
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};
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} // namespace mozilla
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#endif // DOM_MEDIA_WEBCODECS_DECODERAGENT_H
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