98 lines
2.7 KiB
C++
98 lines
2.7 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "snapshot/TextureSaver.h"
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#include "aemu/base/files/CompressingStream.h"
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#include "aemu/base/system/System.h"
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#include <algorithm>
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#include <cassert>
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#include <iterator>
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#include <utility>
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using android::base::CompressingStream;
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namespace android {
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namespace snapshot {
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TextureSaver::TextureSaver(android::base::StdioStream&& stream)
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: mStream(std::move(stream)) {
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// Put a placeholder for the index offset right now.
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mStream.putBe64(0);
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}
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TextureSaver::~TextureSaver() {
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done();
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}
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void TextureSaver::saveTexture(uint32_t texId, const saver_t& saver) {
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if (!mStartTime) {
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mStartTime = base::getHighResTimeUs();
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}
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assert(mIndex.textures.end() ==
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std::find_if(mIndex.textures.begin(), mIndex.textures.end(),
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[texId](FileIndex::Texture& tex) {
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return tex.texId == texId;
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}));
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mIndex.textures.push_back({texId, ftello64(mStream.get())});
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CompressingStream stream(mStream);
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saver(&stream, &mBuffer);
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}
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void TextureSaver::done() {
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if (mFinished) {
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return;
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}
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mIndex.startPosInFile = ftello64(mStream.get());
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writeIndex();
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mEndTime = base::getHighResTimeUs();
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#if SNAPSHOT_PROFILE > 1
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printf("Texture saving time: %.03f\n",
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(mEndTime - mStartTime) / 1000.0);
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#endif
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mHasError = ferror(mStream.get()) != 0;
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mFinished = true;
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mStream.close();
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}
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void TextureSaver::writeIndex() {
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#if SNAPSHOT_PROFILE > 1
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auto start = ftello64(mStream.get());
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#endif
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mStream.putBe32(static_cast<uint32_t>(mIndex.version));
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mStream.putBe32(static_cast<uint32_t>(mIndex.textures.size()));
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for (const FileIndex::Texture& b : mIndex.textures) {
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mStream.putBe32(b.texId);
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mStream.putBe64(static_cast<uint64_t>(b.filePos));
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}
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auto end = ftello64(mStream.get());
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mDiskSize = uint64_t(end);
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#if SNAPSHOT_PROFILE > 1
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printf("texture: index size: %d\n", int(end - start));
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#endif
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fseeko64(mStream.get(), 0, SEEK_SET);
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mStream.putBe64(static_cast<uint64_t>(mIndex.startPosInFile));
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}
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} // namespace snapshot
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} // namespace android
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