[e2d867]: content / media / EncodedBufferCache.cpp  Maximize  Restore  History

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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/. */
#include "EncodedBufferCache.h"
#include "nsAnonymousTemporaryFile.h"
#include "nsLocalFile.h"
namespace mozilla {
void
EncodedBufferCache::AppendBuffer(nsTArray<uint8_t> & aBuf)
{
MutexAutoLock lock(mMutex);
mDataSize += aBuf.Length();
mEncodedBuffers.AppendElement()->SwapElements(aBuf);
if (!mTempFileEnabled && mDataSize > mMaxMemoryStorage) {
nsresult rv = NS_OpenAnonymousTemporaryFile(&mFD);
if (!NS_FAILED(rv)) {
mTempFileEnabled = true;
}
}
if (mTempFileEnabled) {
// has created temporary file, write buffer in it
for (uint32_t i = 0; i < mEncodedBuffers.Length(); i++) {
int64_t amount = PR_Write(mFD, mEncodedBuffers.ElementAt(i).Elements(), mEncodedBuffers.ElementAt(i).Length());
if (amount < mEncodedBuffers.ElementAt(i).Length()) {
NS_WARNING("Failed to write media cache block!");
}
}
mEncodedBuffers.Clear();
}
}
already_AddRefed<nsIDOMBlob>
EncodedBufferCache::ExtractBlob(const nsAString &aContentType)
{
MutexAutoLock lock(mMutex);
nsCOMPtr<nsIDOMBlob> blob;
if (mTempFileEnabled) {
// generate new temporary file to write
blob = new nsDOMTemporaryFileBlob(mFD, 0, mDataSize, aContentType);
// fallback to memory blob
mTempFileEnabled = false;
mDataSize = 0;
mFD = nullptr;
} else {
void* blobData = moz_malloc(mDataSize);
NS_ASSERTION(blobData, "out of memory!!");
if (blobData) {
for (uint32_t i = 0, offset = 0; i < mEncodedBuffers.Length(); i++) {
memcpy((uint8_t*)blobData + offset, mEncodedBuffers.ElementAt(i).Elements(),
mEncodedBuffers.ElementAt(i).Length());
offset += mEncodedBuffers.ElementAt(i).Length();
}
blob = new nsDOMMemoryFile(blobData, mDataSize,
aContentType);
mEncodedBuffers.Clear();
} else
return nullptr;
}
mDataSize = 0;
return blob.forget();
}
} //end namespace

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