зеркало из https://github.com/mozilla/gecko-dev.git
126 строки
3.8 KiB
C++
126 строки
3.8 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 mozilla_AppleVTDecoder_h
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#define mozilla_AppleVTDecoder_h
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#include "PlatformDecoderModule.h"
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#include "mozilla/Atomics.h"
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#include "nsIThread.h"
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#include "ReorderQueue.h"
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#include "TimeUnits.h"
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#include "VideoToolbox/VideoToolbox.h"
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namespace mozilla {
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class AppleVTDecoder : public MediaDataDecoder {
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public:
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AppleVTDecoder(const VideoInfo& aConfig,
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TaskQueue* aTaskQueue,
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layers::ImageContainer* aImageContainer);
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class AppleFrameRef {
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public:
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media::TimeUnit decode_timestamp;
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media::TimeUnit composition_timestamp;
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media::TimeUnit duration;
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int64_t byte_offset;
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bool is_sync_point;
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explicit AppleFrameRef(const MediaRawData& aSample)
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: decode_timestamp(aSample.mTimecode)
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, composition_timestamp(aSample.mTime)
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, duration(aSample.mDuration)
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, byte_offset(aSample.mOffset)
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, is_sync_point(aSample.mKeyframe)
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{
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}
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};
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RefPtr<InitPromise> Init() override;
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RefPtr<DecodePromise> Decode(MediaRawData* aSample) override;
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RefPtr<DecodePromise> Drain() override;
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RefPtr<FlushPromise> Flush() override;
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RefPtr<ShutdownPromise> Shutdown() override;
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void SetSeekThreshold(const media::TimeUnit& aTime) override;
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bool IsHardwareAccelerated(nsACString& aFailureReason) const override
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{
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return mIsHardwareAccelerated;
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}
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const char* GetDescriptionName() const override
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{
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return mIsHardwareAccelerated
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? "apple hardware VT decoder"
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: "apple software VT decoder";
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}
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ConversionRequired NeedsConversion() const override
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{
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return ConversionRequired::kNeedAVCC;
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}
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// Access from the taskqueue and the decoder's thread.
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// OutputFrame is thread-safe.
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void OutputFrame(CVPixelBufferRef aImage, AppleFrameRef aFrameRef);
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private:
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virtual ~AppleVTDecoder();
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RefPtr<FlushPromise> ProcessFlush();
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RefPtr<DecodePromise> ProcessDrain();
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void ProcessShutdown();
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void ProcessDecode(MediaRawData* aSample);
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void AssertOnTaskQueueThread()
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{
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MOZ_ASSERT(mTaskQueue->IsCurrentThreadIn());
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}
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AppleFrameRef* CreateAppleFrameRef(const MediaRawData* aSample);
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CFDictionaryRef CreateOutputConfiguration();
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const RefPtr<MediaByteBuffer> mExtraData;
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const uint32_t mPictureWidth;
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const uint32_t mPictureHeight;
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const uint32_t mDisplayWidth;
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const uint32_t mDisplayHeight;
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// Method to set up the decompression session.
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nsresult InitializeSession();
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nsresult WaitForAsynchronousFrames();
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CFDictionaryRef CreateDecoderSpecification();
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CFDictionaryRef CreateDecoderExtensions();
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const RefPtr<TaskQueue> mTaskQueue;
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const uint32_t mMaxRefFrames;
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const RefPtr<layers::ImageContainer> mImageContainer;
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const bool mUseSoftwareImages;
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// Set on reader/decode thread calling Flush() to indicate that output is
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// not required and so input samples on mTaskQueue need not be processed.
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// Cleared on mTaskQueue in ProcessDrain().
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Atomic<bool> mIsFlushing;
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// Protects mReorderQueue and mPromise.
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Monitor mMonitor;
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ReorderQueue mReorderQueue;
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MozPromiseHolder<DecodePromise> mPromise;
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// Decoded frame will be dropped if its pts is smaller than this
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// value. It shold be initialized before Input() or after Flush(). So it is
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// safe to access it in OutputFrame without protecting.
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Maybe<media::TimeUnit> mSeekTargetThreshold;
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CMVideoFormatDescriptionRef mFormat;
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VTDecompressionSessionRef mSession;
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Atomic<bool> mIsHardwareAccelerated;
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};
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} // namespace mozilla
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#endif // mozilla_AppleVTDecoder_h
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