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/*
* Copyright © 2015 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
package org.altusmetrum.AltosDroid;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;
import android.os.Handler;
import org.altusmetrum.altoslib_11.*;
public abstract class AltosDroidLink extends AltosLink {
Handler handler;
Thread input_thread = null;
public double frequency() {
return frequency;
}
public int telemetry_rate() {
return telemetry_rate;
}
public void save_frequency() {
AltosPreferences.set_frequency(0, frequency);
}
public void save_telemetry_rate() {
AltosPreferences.set_telemetry_rate(0, telemetry_rate);
}
Object closed_lock = new Object();
boolean closing = false;
boolean closed = false;
public boolean closed() {
synchronized(closed_lock) {
return closing;
}
}
void connected() throws InterruptedException {
input_thread = new Thread(this);
input_thread.start();
// Configure the newly connected device for telemetry
print("~\nE 0\n");
set_monitor(false);
AltosDebug.debug("ConnectThread: connected");
/* Let TelemetryService know we're connected
*/
handler.obtainMessage(TelemetryService.MSG_CONNECTED, this).sendToTarget();
/* Notify other waiting threads that we're connected now
*/
notifyAll();
}
public void closing() {
synchronized(closed_lock) {
AltosDebug.debug("Marked closing true");
closing = true;
}
}
private boolean actually_closed() {
synchronized(closed_lock) {
return closed;
}
}
abstract void close_device();
public void close() {
AltosDebug.debug("close(): begin");
closing();
flush_output();
synchronized (closed_lock) {
AltosDebug.debug("Marked closed true");
closed = true;
}
close_device();
synchronized(this) {
if (input_thread != null) {
AltosDebug.debug("close(): stopping input_thread");
try {
AltosDebug.debug("close(): input_thread.interrupt().....");
input_thread.interrupt();
AltosDebug.debug("close(): input_thread.join().....");
input_thread.join();
} catch (Exception e) {}
input_thread = null;
}
notifyAll();
}
}
abstract int write(byte[] buffer, int len);
abstract int read(byte[] buffer, int len);
private static final int buffer_size = 64;
private byte[] in_buffer = new byte[buffer_size];
private byte[] out_buffer = new byte[buffer_size];
private int buffer_len = 0;
private int buffer_off = 0;
private int out_buffer_off = 0;
private byte[] debug_chars = new byte[buffer_size];
private int debug_off;
private void debug_input(byte b) {
if (b == '\n') {
AltosDebug.debug(" " + new String(debug_chars, 0, debug_off));
debug_off = 0;
} else {
if (debug_off < buffer_size)
debug_chars[debug_off++] = b;
}
}
private void disconnected() {
if (closed()) {
AltosDebug.debug("disconnected after closed");
return;
}
AltosDebug.debug("Sending disconnected message");
handler.obtainMessage(TelemetryService.MSG_DISCONNECTED, this).sendToTarget();
}
public int getchar() {
if (actually_closed())
return ERROR;
while (buffer_off == buffer_len) {
buffer_len = read(in_buffer, buffer_size);
if (buffer_len < 0) {
AltosDebug.debug("ERROR returned from getchar()");
disconnected();
return ERROR;
}
buffer_off = 0;
}
// if (AltosDebug.D)
// debug_input(in_buffer[buffer_off]);
return in_buffer[buffer_off++];
}
public void flush_output() {
super.flush_output();
if (actually_closed()) {
out_buffer_off = 0;
return;
}
while (out_buffer_off != 0) {
int sent = write(out_buffer, out_buffer_off);
if (sent <= 0) {
AltosDebug.debug("flush_output() failed");
out_buffer_off = 0;
break;
}
if (sent < out_buffer_off)
System.arraycopy(out_buffer, 0, out_buffer, sent, out_buffer_off - sent);
out_buffer_off -= sent;
}
}
public void putchar(byte c) {
out_buffer[out_buffer_off++] = c;
if (out_buffer_off == buffer_size)
flush_output();
}
public void print(String data) {
byte[] bytes = data.getBytes();
// AltosDebug.debug(data.replace('\n', '\\'));
for (byte b : bytes)
putchar(b);
}
public AltosDroidLink(Handler handler) {
this.handler = handler;
}
}
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