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/**********************************************************************
** Copyright (C) 2002 Michael 'Mickey' Lauer. All rights reserved.
**
** This file is part of Opie Environment.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
**********************************************************************/
#include "zcameraio.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <qimage.h>
#include <opie2/odebug.h>
ZCameraIO* ZCameraIO::_instance = 0;
ZCameraIO* ZCameraIO::instance()
{
if ( !ZCameraIO::_instance )
{
odebug << "Creating ZCameraIO::_instance" << oendl;
ZCameraIO::_instance = new ZCameraIO();
}
return ZCameraIO::_instance;
}
ZCameraIO::ZCameraIO()
:_height( 0 ), _width( 0 ), _zoom( 0 ), _rot( 0 ), _readlen( 0 )
{
_driver = ::open( "/dev/sharp_zdc", O_RDWR );
if ( _driver == -1 )
oerr << "Can't open camera driver: " << strerror(errno) << oendl;
else
init();
}
void ZCameraIO::init()
{
if ( ZCameraIO::_instance )
ofatal << "Don't create more than one ZCameraIO instances." << oendl;
else
{
setReadMode( STATUS );
}
}
ZCameraIO::~ZCameraIO()
{
if ( _driver != -1 )
::close( _driver );
}
inline bool ZCameraIO::isOpen() const
{
return _driver != -1;
}
inline bool ZCameraIO::isShutterPressed()
{
return _status[0] == 'S';
clearShutterLatch();
}
inline bool ZCameraIO::isFinderReversed() const
{
return _status[1] == 'M';
}
inline bool ZCameraIO::isCapturing() const
{
return _status[2] == 'C';
}
inline bool ZCameraIO::isAvailable() const
{
return _status[3] == 'A';
}
bool ZCameraIO::setCaptureFrame( int width, int height, int zoom, bool rot )
{
char b[100];
sprintf( b, "%c=%d,%d,%d,%d", rot ? 'R':'S', width, height, zoom, width*2 );
if ( write( b ) )
{
_width = width;
_height = _height;
_zoom = zoom;
_rot = rot;
_readlen = 2 * _width * _height; // camera is fixed @ 16 bits per pixel
return true;
}
return false;
}
void ZCameraIO::setReadMode( int mode )
{
char b[4];
sprintf( b, "M=%d", mode );
write( b, mode <= 9 ? 3 : 4 );
if ( mode & 1 ) // STATUS bit is set
read( _status, 4 );
}
void ZCameraIO::clearShutterLatch()
{
char b = 'B';
write( &b, 1 );
}
bool ZCameraIO::read( char* b, int len )
{
int rlen = ::read( _driver, b, len );
odebug << "read " << rlen << " from driver." << oendl;
return rlen == len;
}
bool ZCameraIO::write( char* buf, int len )
{
if ( !len )
len = strlen( buf );
odebug << "writing '" << buf << "' to driver." << oendl;
return ::write( _driver, buf, len ) == len;
}
bool ZCameraIO::snapshot( QImage* image )
{
/*
char buf[76800];
write( _driver, "M=13", 4 );
write( _driver, "R=240,160,256,480", 17 );
write( _driver, "M=12", 4 );
int result = read( _driver, &buf, sizeof buf );
return result == sizeof buf;
*/
unsigned char buf[76800];
unsigned char* bp = buf;
unsigned char* p;
int fd = open( "/tmp/cam", O_RDONLY );
if ( ::read( fd, buf, sizeof buf ) != sizeof buf )
owarn << "Couldn't read image from /dev/sharp_zdc" << oendl;
image->create( 240, 160, 16 );
for ( int i = 0; i < 160; ++i )
{
p = image->scanLine( i );
for ( int j = 0; j < 240; j++ )
{
*p = *bp;
p++;
bp++;
*p = *bp;
p++;
bp++;
}
}
return true;
}
bool ZCameraIO::snapshot( uchar* buf )
{
int fd = open( "/tmp/cam", O_RDONLY );
if ( ::read( fd, buf, 76800 ) != 76800 )
owarn << "Couldn't read image from /dev/sharp_zdc" << oendl;
return true;
}
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