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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 MOZILLA_SOURCEBUFFERRESOURCE_H_
#define MOZILLA_SOURCEBUFFERRESOURCE_H_
#include "MediaCache.h"
#include "MediaResource.h"
#include "ResourceQueue.h"
#include "mozilla/Attributes.h"
#include "mozilla/ReentrantMonitor.h"
#include "nsCOMPtr.h"
#include "nsError.h"
#include "nsIPrincipal.h"
#include "nsString.h"
#include "nsTArray.h"
#include "nscore.h"
#include "mozilla/Logging.h"
#define UNIMPLEMENTED() { /* Logging this is too spammy to do by default */ }
class nsIStreamListener;
namespace mozilla {
class MediaDecoder;
class MediaByteBuffer;
namespace dom {
class SourceBuffer;
} // namespace dom
class SourceBufferResource final : public MediaResource
{
public:
explicit SourceBufferResource(const nsACString& aType);
nsresult Close() override;
void Suspend(bool aCloseImmediately) override { UNIMPLEMENTED(); }
void Resume() override { UNIMPLEMENTED(); }
already_AddRefed<nsIPrincipal> GetCurrentPrincipal() override { UNIMPLEMENTED(); return nullptr; }
already_AddRefed<MediaResource> CloneData(MediaResourceCallback*) override { UNIMPLEMENTED(); return nullptr; }
void SetReadMode(MediaCacheStream::ReadMode aMode) override { UNIMPLEMENTED(); }
void SetPlaybackRate(uint32_t aBytesPerSecond) override { UNIMPLEMENTED(); }
nsresult ReadAt(int64_t aOffset, char* aBuffer, uint32_t aCount, uint32_t* aBytes) override;
int64_t Tell() override { return mOffset; }
void Pin() override { UNIMPLEMENTED(); }
void Unpin() override { UNIMPLEMENTED(); }
double GetDownloadRate(bool* aIsReliable) override { UNIMPLEMENTED(); *aIsReliable = false; return 0; }
int64_t GetLength() override { return mInputBuffer.GetLength(); }
int64_t GetNextCachedData(int64_t aOffset) override {
ReentrantMonitorAutoEnter mon(mMonitor);
MOZ_ASSERT(aOffset >= 0);
if (uint64_t(aOffset) < mInputBuffer.GetOffset()) {
return mInputBuffer.GetOffset();
} else if (aOffset == GetLength()) {
return -1;
}
return aOffset;
}
int64_t GetCachedDataEnd(int64_t aOffset) override { UNIMPLEMENTED(); return -1; }
bool IsDataCachedToEndOfResource(int64_t aOffset) override { return false; }
bool IsSuspendedByCache() override { UNIMPLEMENTED(); return false; }
bool IsSuspended() override { UNIMPLEMENTED(); return false; }
nsresult ReadFromCache(char* aBuffer, int64_t aOffset, uint32_t aCount) override;
bool IsTransportSeekable() override { UNIMPLEMENTED(); return true; }
nsresult Open(nsIStreamListener** aStreamListener) override { UNIMPLEMENTED(); return NS_ERROR_FAILURE; }
nsresult GetCachedRanges(MediaByteRangeSet& aRanges) override
{
ReentrantMonitorAutoEnter mon(mMonitor);
if (mInputBuffer.GetLength()) {
aRanges += MediaByteRange(mInputBuffer.GetOffset(),
mInputBuffer.GetLength());
}
return NS_OK;
}
const nsCString& GetContentType() const override { return mType; }
size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override
{
ReentrantMonitorAutoEnter mon(mMonitor);
size_t size = MediaResource::SizeOfExcludingThis(aMallocSizeOf);
size += mType.SizeOfExcludingThisIfUnshared(aMallocSizeOf);
size += mInputBuffer.SizeOfExcludingThis(aMallocSizeOf);
return size;
}
size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override
{
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
}
bool IsExpectingMoreData() override
{
return false;
}
// Used by SourceBuffer.
void AppendData(MediaByteBuffer* aData);
void Ended();
bool IsEnded()
{
ReentrantMonitorAutoEnter mon(mMonitor);
return mEnded;
}
// Remove data from resource if it holds more than the threshold reduced by
// the given number of bytes. Returns amount evicted.
uint32_t EvictData(uint64_t aPlaybackOffset, int64_t aThresholdReduct,
ErrorResult& aRv);
// Remove data from resource before the given offset.
void EvictBefore(uint64_t aOffset, ErrorResult& aRv);
// Remove all data from the resource
uint32_t EvictAll();
// Returns the amount of data currently retained by this resource.
int64_t GetSize() {
ReentrantMonitorAutoEnter mon(mMonitor);
return mInputBuffer.GetLength() - mInputBuffer.GetOffset();
}
#if defined(DEBUG)
void Dump(const char* aPath) {
mInputBuffer.Dump(aPath);
}
#endif
private:
virtual ~SourceBufferResource();
nsresult ReadAtInternal(int64_t aOffset, char* aBuffer, uint32_t aCount, uint32_t* aBytes, bool aMayBlock);
const nsCString mType;
// Provides synchronization between SourceBuffers and InputAdapters.
// Protects all of the member variables below. Read() will await a
// Notify() (from Seek, AppendData, Ended, or Close) when insufficient
// data is available in mData.
mutable ReentrantMonitor mMonitor;
// The buffer holding resource data.
ResourceQueue mInputBuffer;
uint64_t mOffset;
bool mClosed;
bool mEnded;
};
} // namespace mozilla
#undef UNIMPLEMENTED
#endif /* MOZILLA_SOURCEBUFFERRESOURCE_H_ */
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