143 lines
4.2 KiB
C++
143 lines
4.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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_SOURCEBUFFERRESOURCE_H_
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#define MOZILLA_SOURCEBUFFERRESOURCE_H_
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#include "mozilla/AbstractThread.h"
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#include "mozilla/Logging.h"
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#include "MediaResource.h"
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#include "ResourceQueue.h"
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#define UNIMPLEMENTED() \
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{ /* Logging this is too spammy to do by default */ \
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}
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namespace mozilla {
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class MediaByteBuffer;
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class AbstractThread;
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namespace dom {
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class SourceBuffer;
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} // namespace dom
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DDLoggedTypeDeclNameAndBase(SourceBufferResource, MediaResource);
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// SourceBufferResource is not thread safe.
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class SourceBufferResource final
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: public MediaResource,
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public DecoderDoctorLifeLogger<SourceBufferResource> {
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public:
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SourceBufferResource();
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RefPtr<GenericPromise> Close() override;
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nsresult ReadAt(int64_t aOffset, char* aBuffer, uint32_t aCount,
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uint32_t* aBytes) override;
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// Memory-based and no locks, caching discouraged.
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bool ShouldCacheReads() override { return false; }
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void Pin() override { UNIMPLEMENTED(); }
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void Unpin() override { UNIMPLEMENTED(); }
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int64_t GetLength() override { return mInputBuffer.GetLength(); }
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int64_t GetNextCachedData(int64_t aOffset) override {
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MOZ_ASSERT(OnThread());
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MOZ_ASSERT(aOffset >= 0);
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if (uint64_t(aOffset) < mInputBuffer.GetOffset()) {
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return mInputBuffer.GetOffset();
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} else if (aOffset == GetLength()) {
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return -1;
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}
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return aOffset;
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}
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int64_t GetCachedDataEnd(int64_t aOffset) override {
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MOZ_ASSERT(OnThread());
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MOZ_ASSERT(aOffset >= 0);
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if (uint64_t(aOffset) < mInputBuffer.GetOffset() ||
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aOffset >= GetLength()) {
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// aOffset is outside of the buffered range.
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return aOffset;
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}
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return GetLength();
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}
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bool IsDataCachedToEndOfResource(int64_t aOffset) override { return false; }
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nsresult ReadFromCache(char* aBuffer, int64_t aOffset,
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uint32_t aCount) override;
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nsresult GetCachedRanges(MediaByteRangeSet& aRanges) override {
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MOZ_ASSERT(OnThread());
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if (mInputBuffer.GetLength()) {
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aRanges +=
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MediaByteRange(mInputBuffer.GetOffset(), mInputBuffer.GetLength());
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}
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return NS_OK;
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}
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size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const {
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MOZ_ASSERT(OnThread());
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return mInputBuffer.SizeOfExcludingThis(aMallocSizeOf);
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}
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size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
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return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
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}
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// Used by SourceBuffer.
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void AppendData(MediaByteBuffer* aData);
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void AppendData(const MediaSpan& aData);
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void Ended();
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bool IsEnded() {
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MOZ_ASSERT(OnThread());
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return mEnded;
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}
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// Remove data from resource if it holds more than the threshold reduced by
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// the given number of bytes. Returns amount evicted.
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uint32_t EvictData(uint64_t aPlaybackOffset, int64_t aThresholdReduct);
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// Remove data from resource before the given offset.
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void EvictBefore(uint64_t aOffset);
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// Remove all data from the resource
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uint32_t EvictAll();
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// Returns the amount of data currently retained by this resource.
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int64_t GetSize() {
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MOZ_ASSERT(OnThread());
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return mInputBuffer.GetLength() - mInputBuffer.GetOffset();
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}
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const uint8_t* GetContiguousAccess(int64_t aOffset, size_t aSize) {
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return mInputBuffer.GetContiguousAccess(aOffset, aSize);
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}
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#if defined(DEBUG)
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void Dump(const char* aPath) { mInputBuffer.Dump(aPath); }
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#endif
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private:
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virtual ~SourceBufferResource();
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nsresult ReadAtInternal(int64_t aOffset, char* aBuffer, uint32_t aCount,
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uint32_t* aBytes);
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#if defined(DEBUG)
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const RefPtr<AbstractThread> mThread;
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// TaskQueue methods and objects.
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const AbstractThread* GetThread() const;
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bool OnThread() const;
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#endif
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// The buffer holding resource data.
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ResourceQueue mInputBuffer;
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bool mClosed = false;
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bool mEnded = false;
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};
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} // namespace mozilla
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#undef UNIMPLEMENTED
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#endif /* MOZILLA_SOURCEBUFFERRESOURCE_H_ */
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