74 lines
2.5 KiB
C++
Vendored
74 lines
2.5 KiB
C++
Vendored
/*
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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 <stdint.h>
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#include <memory.h>
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#include "oboe_common_FixedBlockAdapter_android.h"
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#include "oboe_common_FixedBlockWriter_android.h"
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FixedBlockWriter::FixedBlockWriter(FixedBlockProcessor &fixedBlockProcessor)
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: FixedBlockAdapter(fixedBlockProcessor) {}
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int32_t FixedBlockWriter::writeToStorage(uint8_t *buffer, int32_t numBytes) {
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int32_t bytesToStore = numBytes;
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int32_t roomAvailable = mSize - mPosition;
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if (bytesToStore > roomAvailable) {
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bytesToStore = roomAvailable;
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}
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memcpy(mStorage.get() + mPosition, buffer, bytesToStore);
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mPosition += bytesToStore;
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return bytesToStore;
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}
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int32_t FixedBlockWriter::write(uint8_t *buffer, int32_t numBytes) {
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int32_t bytesLeft = numBytes;
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// If we already have data in storage then add to it.
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if (mPosition > 0) {
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int32_t bytesWritten = writeToStorage(buffer, bytesLeft);
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buffer += bytesWritten;
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bytesLeft -= bytesWritten;
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// If storage full then flush it out
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if (mPosition == mSize) {
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bytesWritten = mFixedBlockProcessor.onProcessFixedBlock(mStorage.get(), mSize);
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if (bytesWritten < 0) return bytesWritten;
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mPosition = 0;
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if (bytesWritten < mSize) {
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// Only some of the data was written! This should not happen.
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return -1;
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}
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}
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}
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// Write through if enough for a complete block.
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while(bytesLeft > mSize) {
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int32_t bytesWritten = mFixedBlockProcessor.onProcessFixedBlock(buffer, mSize);
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if (bytesWritten < 0) return bytesWritten;
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buffer += bytesWritten;
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bytesLeft -= bytesWritten;
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}
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// Save any remaining partial blocks for next time.
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if (bytesLeft > 0) {
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int32_t bytesWritten = writeToStorage(buffer, bytesLeft);
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bytesLeft -= bytesWritten;
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}
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return numBytes - bytesLeft;
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}
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