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xvideoimagepainter.cc
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xvideoimagepainter.cc
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/* HornetsEye - Computer Vision with Ruby
Copyright (C) 2006, 2007 Jan Wedekind
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 3 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, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
extern "C" {
#ifndef HAVE_LIBSWSCALE_INCDIR
#include <ffmpeg/swscale.h>
#else
#include <libswscale/swscale.h>
#endif
}
#ifndef NDEBUG
#include <iostream>
#include <iomanip>
#endif
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include "rubytools.hh"
#include "x11output.hh"
#include "x11window.hh"
#include "xvideoimagepainter.hh"
// also see xvwidget.cc
using namespace std;
VALUE XVideoImagePainter::cRubyClass = Qnil;
VALUE XVideoImagePainter::rbHornetseye = Qnil;
std::set< XvPortID > XVideoImagePainter::grabbedPorts;
XVideoImagePainter::XVideoImagePainter(void):
m_port(0), m_requireColourKey(false), m_colourKey(0), m_xvImage(NULL)
{
}
XVideoImagePainter::~XVideoImagePainter(void)
{
#ifndef NDEBUG
cerr << "Destroying XVideo image painter." << endl;
#endif
if ( m_xvImage != NULL ) {
XFree( m_xvImage );
};
}
void XVideoImagePainter::paint( bool x11Event ) throw (Error)
{
#ifndef NDEBUG
cerr << "XVideoImagePainter::paint( " << x11Event << " )" << endl;
#endif
assert( m_window != NULL );
// Draw colour key if X11 requires some redrawing
// (Colour key should not be drawn if the display merely has to
// show the next image).
if ( x11Event && m_requireColourKey ) {
XSetForeground( m_display->get(), m_window->gc(), m_colourKey );
XFillRectangle( m_display->get(), m_window->get(),
m_window->gc(), 0, 0,
m_window->width(), m_window->height() );
};
if ( m_imageSource != NULL ) {
#ifndef NDEBUG
cerr << "Requesting image." << endl;
#endif
FramePtr frame( m_imageSource->frame() );
if ( frame ) {
#ifndef NDEBUG
cerr << "XVideo-output for \"" << frame->typecode() << "\"." << endl;
#endif
int uid = selectFormat( typecodeToUID( frame->typecode() ) );
ERRORMACRO( uid != 0, Error, , "XVideo-extension does not "
"support YV12, I420, or RGB24" );
string typecode = uidToTypecode( uid );
if ( frame->typecode() != typecode ) {
VALUE
rbTypecode = rb_funcall( rbHornetseye, rb_intern( "const_get" ), 1,
rb_str_new( typecode.c_str(),
typecode.length() ) ),
rbFrame = rb_funcall( frame->rubyObject(), rb_intern( "to_type" ), 1,
rbTypecode );
frame = FramePtr( new Frame( rbFrame ) );
};
if ( m_xvImage != NULL ) {
if ( m_xvImage->id != uid ||
m_xvImage->width != frame->width() ||
m_xvImage->height != frame->height() ) {
XFree( m_xvImage );
m_xvImage = NULL;
};
};
if ( m_xvImage == NULL ) {
m_xvImage =
XvCreateImage( m_display->get(), m_port, uid,
(char *)frame->data(),
frame->width(), frame->height() );
#ifndef NDEBUG
cerr << "Created " << m_xvImage->width << 'x'
<< m_xvImage->height << ' ' << frame->typecode()
<< "-image for X video." << endl;
cerr << "# planes = " << m_xvImage->num_planes << endl;
for ( int i=0; i<m_xvImage->num_planes; i++ )
cerr << "offsets[" << i << "]=" << m_xvImage->offsets[i]
<< endl
<< "pitches[" << i << "]=" << m_xvImage->pitches[i]
<< endl;
#endif
} else
m_xvImage->data = (char *)frame->data();
if ( frame->typecode() == "YV12" ) {
// YV12 may require alignment for X video output.
frame = alignYV12( frame );
m_xvImage->data = (char *)frame->data();
};
XvPutImage( m_display->get(), m_port, m_window->get(),
m_window->gc(), m_xvImage, 0, 0,
m_xvImage->width, m_xvImage->height, 0, 0,
m_window->width(), m_window->height() );
};
};
}
FramePtr XVideoImagePainter::alignYV12( FramePtr frame )
{
// YV12-images aligned by Xine sometimes do not fit the required
// output.
assert( m_xvImage != NULL );
int
width = frame->width(),
height = frame->height(),
width2 = ( width + 1 ) / 2,
height2 = ( height + 1 ) / 2,
widtha = ( width + 7 ) & ~0x7,
width2a = ( width2 + 7 ) & ~0x7;
assert( m_xvImage->offsets[0] == 0 );
FramePtr retVal;
if ( m_xvImage->offsets[1] != widtha * height ||
m_xvImage->offsets[2] != widtha * height + width2a * height2 ||
m_xvImage->pitches[0] != widtha ||
m_xvImage->pitches[1] != width2a ||
m_xvImage->pitches[2] != width2a ) {
#ifndef NDEBUG
cerr << "YV12-Image needs alignment." << endl;
#endif
FramePtr dest( new Frame( "YV12",
m_xvImage->width, m_xvImage->height ) );
uint8_t *sourceData[4];
int sourceLineSize[4];
sourceData[0] = (uint8_t *)frame->data();
sourceData[2] = (uint8_t *)frame->data() + widtha * height;
sourceData[1] = (uint8_t *)sourceData[2] + width2a * height2;
sourceLineSize[0] = widtha;
sourceLineSize[1] = width2a;
sourceLineSize[2] = width2a;
uint8_t *destData[4];
int destLineSize[4];
destData[0] = (uint8_t *)dest->data();
destData[2] = (uint8_t *)dest->data() + m_xvImage->offsets[1];
destData[1] = (uint8_t *)dest->data() + m_xvImage->offsets[2];
destLineSize[0] = m_xvImage->pitches[0];
destLineSize[1] = m_xvImage->pitches[2];
destLineSize[2] = m_xvImage->pitches[1];
SwsContext *swsContext = sws_getContext( width, height, PIX_FMT_YUV420P,
width, height, PIX_FMT_YUV420P,
SWS_FAST_BILINEAR, 0, 0, 0 );
sws_scale( swsContext, sourceData, sourceLineSize, 0,
height, destData, destLineSize );
sws_freeContext( swsContext );
retVal = dest;
} else
retVal = frame;
return retVal;
}
int XVideoImagePainter::typecodeToUID( string typecode )
{
map< string, int > uid;
uid[ "UBYTERGB" ] = 0x20424752;
uid[ "YV12" ] = 0x32315659;
uid[ "I420" ] = 0x30323449;
map< string, int >::iterator i = uid.find( typecode );
int retVal = 0;
if ( i != uid.end() ) retVal = i->second;
#ifndef NDEBUG
if ( retVal != 0 )
cerr << "uid for \"" << typecode << "\" is 0x"
<< setbase( 16 ) << retVal << setbase( 10 ) << endl;
else
cerr << "uid for \"" << typecode << "\" was not found";
#endif
return retVal;
}
string XVideoImagePainter::uidToTypecode( int uid )
{
map< int, string > typecode;
typecode[ 0x20424752 ] = "UBYTERGB";
typecode[ 0x32315659 ] = "YV12";
typecode[ 0x30323449 ] = "I420";
map< int, string >::iterator i = typecode.find( uid );
string retVal = "";
if ( i != typecode.end() ) retVal = i->second;
#ifndef NDEBUG
if ( retVal != "" )
cerr << "0x" << setbase( 16 ) << uid << setbase( 10 )
<< " designates colourspace \"" << retVal << "\"" << endl;
else
cerr << "0x" << setbase( 16 ) << uid << setbase( 10 )
<< " does not designate a known colourspace" << endl;
#endif
return retVal;
}
void XVideoImagePainter::unregisterWindow(void)
{
if ( m_port != 0 ) {
XvUngrabPort( m_display->get(), m_port, CurrentTime );
grabbedPorts.erase( m_port );
};
m_port = 0;
X11Painter::unregisterWindow();
}
XVisualInfo *XVideoImagePainter::visualInfo( X11DisplayPtr display )
throw (Error)
{
// Integrated GPL licensed code from MPlayer (http://www.mplayerhq.hu/).
m_display = display;
int depth;
{
XWindowAttributes attributes;
XGetWindowAttributes( display->get(),
DefaultRootWindow( display->get() ),
&attributes );
#ifndef NDEBUG
cerr << "Colour depth is " << attributes.depth << '.' << endl;
#endif
switch ( attributes.depth ) {
case 15:
case 16:
case 24:
case 32:
depth = attributes.depth;
break;
default:
depth = 24;
};
};
#ifndef NDEBUG
cerr << "Trying colour depth " << depth << '.' << endl;
#endif
ERRORMACRO( XMatchVisualInfo( display->get(),
DefaultScreen( display->get() ), depth,
TrueColor, &m_visualInfo ) != 0,
Error, , "Could not find suitable true colour visual." );
{
unsigned int ver, rel, req, ev, err;
ERRORMACRO( XvQueryExtension( display->get(), &ver, &rel, &req, &ev,
&err ) == Success, Error, ,
"Failure requesting X video extension" );
}
unsigned int numAdaptors;
XvAdaptorInfo *adaptorInfo = NULL;
ERRORMACRO( XvQueryAdaptors( display->get(),
DefaultRootWindow( display->get() ),
&numAdaptors, &adaptorInfo ) == Success,
Error, , "Error requesting information about X video "
"adaptors." );
for ( int i=0; i<(signed)numAdaptors; i++ ) {
if ( ( adaptorInfo[i].type & ( XvInputMask | XvImageMask ) ) ==
( XvInputMask | XvImageMask ) ) {
for ( int p=adaptorInfo[i].base_id;
p<(signed)(adaptorInfo[i].base_id+adaptorInfo[i].num_ports);
p++ )
// API does not seem to protect against grabbing a port
// twice (from within the same process).
if ( grabbedPorts.find( p ) == grabbedPorts.end() ) {
if ( XvGrabPort( display->get(), p, CurrentTime ) == Success ) {
#ifndef NDEBUG
cerr << "Grabbed port " << p << endl;
#endif
grabbedPorts.insert( p );
m_port = p;
break;
};
};
if ( m_port != 0 )
break;
};
};
XvFreeAdaptorInfo( adaptorInfo );
ERRORMACRO( m_port != 0, Error, ,
"Could not grab a free port for X video output." );
try {
Atom xvColourKey = findAtom( "XV_COLORKEY" );
if ( xvColourKey != None ) {
#ifndef NDEBUG
cerr << "Require drawing of colourkey." << endl;
#endif
m_requireColourKey = true;
ERRORMACRO( XvGetPortAttribute( display->get(), m_port, xvColourKey,
&m_colourKey ) == Success,
Error, , "Error reading value of colour-key." );
#ifndef NDEBUG
cerr << "Colour-key is 0x" << setw( 6 ) << setbase( 16 )
<< m_colourKey << setbase( 10 ) << setw( 0 ) << endl;
#endif
Atom xvAutoPaint = findAtom( "XV_AUTOPAINT_COLORKEY" );
if ( xvAutoPaint != None ) {
#ifndef NDEBUG
cerr << "Disabling autopainting." << endl;
#endif
XvSetPortAttribute( display->get(), m_port, xvAutoPaint, 0 );
} else {
#ifndef NDEBUG
cerr << "Graphic card does not provide autopainting." << endl;
#endif
};
} else {
m_requireColourKey = false;
#ifndef NDEBUG
cerr << "No drawing of colourkey required." << endl;
#endif
};
} catch ( Error &e ) {
XvUngrabPort( display->get(), m_port, CurrentTime );
grabbedPorts.erase( m_port );
throw e;
};
return &m_visualInfo;
}
Atom XVideoImagePainter::findAtom( const char *name ) throw (Error)
{
// Integrated GPL-licensed code from MPlayer (http://www.mplayerhq.hu/).
assert( m_display );
assert( m_port != 0 );
XvAttribute *attributes;
int numAttributes;
Atom retVal = None;
attributes = XvQueryPortAttributes( m_display->get(), m_port,
&numAttributes );
if (attributes != NULL) {
for ( int i=0; i<numAttributes; i++ )
if ( strcmp( attributes[i].name, name ) == 0 ) {
retVal = XInternAtom( m_display->get(), name, False );
break;
}
XFree( attributes );
}
return retVal;
}
int XVideoImagePainter::selectFormat( const int preferredUID ) throw (Error)
{
// Integrated GPL-licensed code from MPlayer (http://www.mplayerhq.hu/).
assert( m_display );
assert( m_port != 0 );
XvImageFormatValues *formats;
int numFormats;
formats = XvListImageFormats( m_display->get(), m_port, &numFormats );
ERRORMACRO( formats != NULL, Error, ,
"Error requesting list of image formats." );
#ifndef NDEBUG
for ( int i=0; i<numFormats; i++ ) {
int id = formats[i].id;
cerr << "format 0x" << setbase( 16 ) << id << setbase( 10 ) << ": '";
cerr << (char)( id & 0xFF )
<< (char)( ( id >> 8 ) & 0xFF )
<< (char)( ( id >> 16 ) & 0xFF )
<< (char)( ( id >> 24 ) & 0xFF ) << "'";
if ( formats[i].format == XvPacked )
cerr << "(packed)" << endl;
else
cerr << "(planar)" << endl;
};
#endif
int retVal = 0;
for ( int i=0; i<numFormats; i++ )
if ( formats[i].id == preferredUID && preferredUID != 0 ) {
#ifndef NDEBUG
cerr << "Found XVideo support for preferred colourspace ";
cerr << "0x" << setbase( 16 ) << preferredUID << setbase( 10 ) << endl;
#endif
retVal = preferredUID;
break;
} else if ( retVal == 0 && uidToTypecode( formats[i].id ) != "" ) {
#ifndef NDEBUG
cerr << "Selecting \"" << uidToTypecode( formats[i].id )
<< "\" as colourspace for fallback" << endl;
#endif
retVal = formats[i].id;
}
return retVal;
}
VALUE XVideoImagePainter::registerRubyClass( VALUE module,
VALUE cX11Output )
{
cRubyClass = rb_define_class_under( module, "XVideoOutput", cX11Output );
rbHornetseye = module;
rb_define_singleton_method( cRubyClass, "new",
RUBY_METHOD_FUNC( wrapNew ), 0 );
return cRubyClass;
}
VALUE XVideoImagePainter::wrapNew( VALUE rbClass )
{
VALUE retVal = Qnil;
X11PainterPtr painter( new XVideoImagePainter );
X11OutputPtr ptr( new X11Output( painter ) );
retVal = Data_Wrap_Struct( rbClass,
X11Output::markRubyObject,
X11Output::deleteRubyObject,
new X11OutputPtr( ptr ) );
return retVal;
}