author | mickeyl <mickeyl> | 2003-04-06 14:38:18 (UTC) |
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committer | mickeyl <mickeyl> | 2003-04-06 14:38:18 (UTC) |
commit | 0b985ce87d6ce6d4110a50d5be48831d34794cd2 (patch) (side-by-side diff) | |
tree | da19d8dc2cd2b37d15220783940652e8e91f3843 /noncore/multimedia/camera/zcameraio.cpp | |
parent | 91d65a97c956963a24f418fadd7cd69f6a52f5d5 (diff) | |
download | opie-0b985ce87d6ce6d4110a50d5be48831d34794cd2.zip opie-0b985ce87d6ce6d4110a50d5be48831d34794cd2.tar.gz opie-0b985ce87d6ce6d4110a50d5be48831d34794cd2.tar.bz2 |
- add realtime preview widget with zoom control
The camera driver is damn slow. For a 240x160x16 image, it takes ~100ms. That gives approx. 10fps which is too slow for doing video. :(
Diffstat (limited to 'noncore/multimedia/camera/zcameraio.cpp') (more/less context) (show whitespace changes)
-rw-r--r-- | noncore/multimedia/camera/zcameraio.cpp | 58 |
1 files changed, 34 insertions, 24 deletions
diff --git a/noncore/multimedia/camera/zcameraio.cpp b/noncore/multimedia/camera/zcameraio.cpp index 7343dca..56b2e13 100644 --- a/noncore/multimedia/camera/zcameraio.cpp +++ b/noncore/multimedia/camera/zcameraio.cpp @@ -15,67 +15,73 @@ #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 <qdatetime.h> #include <opie2/odebug.h> +#define SHARPZDC "/dev/sharp_zdc" + 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 ); + _driver = ::open( SHARPZDC, 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 ) + { + setReadMode( 0 ); ::close( _driver ); } +} inline bool ZCameraIO::isOpen() const { return _driver != -1; } inline bool ZCameraIO::isShutterPressed() { return _status[0] == 'S'; clearShutterLatch(); @@ -98,109 +104,113 @@ 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; + _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]; + char b[10]; 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 ) { + #ifndef NO_TIMING + QTime t; + t.start(); + #endif int rlen = ::read( _driver, b, len ); - odebug << "read " << rlen << " from driver." << oendl; + #ifndef NO_TIMING + int time = t.elapsed(); + #else + int time = -1; + #endif + if ( rlen ) + odebug << "read " << rlen << " ('" << b[0] << b[1] << b[2] << b[3] << "') [" << time << " ms] from driver." << oendl; + else + odebug << "read nothing 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 ) { - /* - + setReadMode( IMAGE | XFLIP | YFLIP ); 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; + 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; + read( bp, _readlen ); 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 ) +bool ZCameraIO::snapshot( unsigned char* buf ) { + setReadMode( IMAGE | XFLIP | YFLIP ); + + read( (char*) buf, _readlen ); + + /* //TESTCODE int fd = open( "/tmp/cam", O_RDONLY ); - if ( ::read( fd, buf, 76800 ) != 76800 ) + if ( ::read( fd, (char*) buf, 76800 ) != 76800 ) owarn << "Couldn't read image from /dev/sharp_zdc" << oendl; + // TESTCODE */ + return true; } |