0,0 → 1,99 |
/* |
AVRcamVIEW: A PC application to test out the functionallity of the |
AVRcam real-time image processing engine. |
Copyright (C) 2004 Brent A. Taylor |
|
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; either |
version 2 of the License, or (at your option) any later version. |
|
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 |
|
For more information on the AVRcamVIEW, please contact: |
|
taylorba@comcast.net |
|
or go to www.jrobot.net for more details regarding the system. |
*/ |
|
package avr.io; |
|
import java.io.*; |
|
public class AVRInputStream extends FilterInputStream { |
|
private static final int NEW_LINE = '\r'; |
private static final int END_DUMP_DATA = 0x0F; |
private static final int END_TRACK_DATA = 0xFF; |
|
private static final int SEARCHING_STATE = 0x00; |
private static final int DUMP_FRAME_STATE = 0x01; |
private static final int ACCEPTING_STATE = 0x02; |
|
public AVRInputStream(InputStream in) { |
super(in); |
} |
|
public int read(byte[] data, int off, int len) throws IOException { |
|
int terminator = NEW_LINE; |
int state = SEARCHING_STATE; |
|
int value = -1; |
int bytesRead = 0; |
boolean cont = false; |
|
do { |
|
value = read(); |
|
if(value != -1) { |
|
switch(state) { |
case SEARCHING_STATE: |
//System.out.println("(" + Integer.toHexString(value & 0xFF) + ") "); |
data[off] = (byte)value; |
if(value == 0x0A) { |
terminator = END_TRACK_DATA; |
state = ACCEPTING_STATE; |
bytesRead++; |
} else if(value == 0x0B) { |
terminator = END_DUMP_DATA; |
state = DUMP_FRAME_STATE; |
bytesRead++; |
} else if(value == 'A' || value == 'N') { |
terminator = NEW_LINE; |
state = ACCEPTING_STATE; |
bytesRead++; |
} |
cont = false; |
break; |
case DUMP_FRAME_STATE: |
data[off + bytesRead++] = (byte)value; |
state = ACCEPTING_STATE; |
cont = true; |
break; |
case ACCEPTING_STATE: |
//System.out.println(Integer.toHexString(value & 0xFF) + " "); |
data[off + bytesRead++] = (byte)value; |
cont = false; |
break; |
} |
|
} |
|
|
} while(cont || value != terminator); |
|
return bytesRead; |
} |
|
} |