mirror of
https://codeberg.org/Freeyourgadget/Gadgetbridge
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99 lines
3.8 KiB
Java
99 lines
3.8 KiB
Java
/* Copyright (C) 2016-2017 Carsten Pfeiffer, Daniele Gobbetti
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This file is part of Gadgetbridge.
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Gadgetbridge is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Gadgetbridge is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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package nodomain.freeyourgadget.gadgetbridge.service.devices.liveview;
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import android.bluetooth.BluetoothAdapter;
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import android.content.Context;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.nio.ByteBuffer;
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import java.util.UUID;
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import nodomain.freeyourgadget.gadgetbridge.devices.liveview.LiveviewConstants;
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import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
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import nodomain.freeyourgadget.gadgetbridge.service.btclassic.BtClassicIoThread;
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import nodomain.freeyourgadget.gadgetbridge.service.serial.GBDeviceProtocol;
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import nodomain.freeyourgadget.gadgetbridge.util.GB;
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public class LiveviewIoThread extends BtClassicIoThread {
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private static final Logger LOG = LoggerFactory.getLogger(LiveviewIoThread.class);
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private static final UUID SERIAL = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
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public LiveviewIoThread(GBDevice gbDevice, Context context, GBDeviceProtocol lvProtocol, LiveviewSupport lvSupport, BluetoothAdapter lvBtAdapter) {
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super(gbDevice, context, lvProtocol, lvSupport, lvBtAdapter);
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}
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protected byte[] parseIncoming(InputStream inputStream) throws IOException {
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ByteArrayOutputStream msgStream = new ByteArrayOutputStream();
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boolean finished = false;
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ReaderState state = ReaderState.ID;
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byte[] incoming = new byte[1];
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while (!finished) {
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inputStream.read(incoming);
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msgStream.write(incoming);
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switch (state) {
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case ID:
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state = ReaderState.HEADER_LEN;
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incoming = new byte[1];
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break;
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case HEADER_LEN:
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int headerSize = 0xff & incoming[0];
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state = ReaderState.HEADER;
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incoming = new byte[headerSize];
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break;
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case HEADER:
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int payloadSize = getLastInt(msgStream);
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if (payloadSize < 0 || payloadSize > 8000) //this will possibly be changed in the future
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throw new IOException();
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state = ReaderState.PAYLOAD;
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incoming = new byte[payloadSize];
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break;
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case PAYLOAD: //read is blocking, if we are here we have all the data
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finished = true;
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break;
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}
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}
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byte[] msgArray = msgStream.toByteArray();
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LOG.debug("received: " + GB.hexdump(msgArray, 0, msgArray.length));
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return msgArray;
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}
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/**
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* Enumeration containing the possible internal status of the reader.
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*/
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private enum ReaderState {
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ID, HEADER_LEN, HEADER, PAYLOAD;
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}
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private int getLastInt(ByteArrayOutputStream stream) {
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byte[] array = stream.toByteArray();
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ByteBuffer buffer = ByteBuffer.wrap(array, array.length - 4, 4);
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buffer.order(LiveviewConstants.BYTE_ORDER);
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return buffer.getInt();
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}
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}
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