Kino: XvDisplayer Class Reference

00461                                                                                                        :
00462         xvImage( NULL )
00463 {
00464 
00465     cerr << ">> Trying XVideo at " << width << "x" << height << endl;
00466 
00467     this->drawingarea = drawingarea;
00468     img_width = width;
00469     img_height = height;
00470     this->isPAL = isPAL;
00471     this->isWidescreen = isWidescreen;
00472 
00473     shmInfo.shmaddr = NULL;
00474     gotPort = false;
00475 
00476     window = GDK_WINDOW_XID( drawingarea->window );
00477     display = GDK_WINDOW_XDISPLAY( drawingarea->window );
00478 
00479     unsigned int    count;
00480     XvAdaptorInfo   *adaptorInfo;
00481 
00482     if ( XvQueryAdaptors( display, window, &count, &adaptorInfo ) == Success )
00483     {
00484 
00485         cerr << ">>> XvQueryAdaptors count: " << count << endl;
00486         for ( unsigned int n = 0; gotPort == false && n < count; ++n )
00487         {
00488             // Diagnostics
00489             cerr << ">>> Xv: " << adaptorInfo[ n ].name
00490             << ": ports " << adaptorInfo[ n ].base_id
00491             << " - " << adaptorInfo[ n ].base_id +
00492             adaptorInfo[ n ].num_ports - 1
00493             << endl;
00494 
00495             for ( port = adaptorInfo[ n ].base_id;
00496                     port < adaptorInfo[ n ].base_id + adaptorInfo[ n ].num_ports;
00497                     port ++ )
00498             {
00499                 if ( XvGrabPort( display, port, CurrentTime ) == 0 )
00500                 {
00501 
00502                     int formats;
00503                     XvImageFormatValues *list;
00504 
00505                     list = XvListImageFormats( display, port, &formats );
00506 
00507                     cerr << ">>> formats supported: " << formats << endl;
00508 
00509                     for ( int i = 0; i < formats; i ++ )
00510                     {
00511                         fprintf( stderr, ">>>     0x%x (%c%c%c%c) %s\n",
00512                                  list[ i ].id,
00513                                  ( list[ i ].id ) & 0xff,
00514                                  ( list[ i ].id >> 8 ) & 0xff,
00515                                  ( list[ i ].id >> 16 ) & 0xff,
00516                                  ( list[ i ].id >> 24 ) & 0xff,
00517                                  ( list[ i ].format == XvPacked ) ? "packed" : "planar" );
00518                         if ( list[ i ].id == 0x32595559 && !gotPort )
00519                             gotPort = true;
00520                     }
00521 
00522                     if ( !gotPort )
00523                     {
00524                         XvUngrabPort( display, port, CurrentTime );
00525                     }
00526                     else
00527                     {
00528                         grabbedPort = port;
00529                         break;
00530                     }
00531                 }
00532             }
00533         }
00534 
00535         if ( gotPort )
00536         {
00537             int num;
00538             unsigned int unum;
00539             XvEncodingInfo *enc;
00540             
00541             XvQueryEncodings( display, grabbedPort, &unum, &enc );
00542             for ( unsigned int index = 0; index < unum; index ++ )
00543             {
00544                 fprintf( stderr, ">>> %d: %s, %ldx%ld rate = %d/%d\n", index, enc->name,
00545                         enc->width, enc->height, enc->rate.numerator,
00546                         enc->rate.denominator );
00547             }
00548             
00549             XvAttribute *xvattr = XvQueryPortAttributes( display, port, &num );
00550             for ( int k = 0; k < num; k++ )
00551             {
00552                 if ( xvattr[k].flags & XvSettable ) 
00553                 {
00554                     if ( strcmp( xvattr[k].name, "XV_AUTOPAINT_COLORKEY") == 0 )
00555                     {
00556                         Atom val_atom = XInternAtom( display, xvattr[k].name, False );
00557                         if ( XvSetPortAttribute( display, port, val_atom, 1 ) != Success )
00558                             fprintf(stderr, "Couldn't set Xv attribute %s\n", xvattr[k].name);
00559                     }
00560                     else if (  strcmp( xvattr[k].name, "XV_COLORKEY") == 0 )
00561                     {
00562                         Atom val_atom = XInternAtom( display, xvattr[k].name, False );
00563                         if ( XvSetPortAttribute( display, port, val_atom, 0x010102 ) != Success )
00564                             fprintf(stderr, "Couldn't set Xv attribute %s\n", xvattr[k].name);
00565                     }
00566                 }
00567             }
00568         }
00569 
00570         if ( gotPort )
00571         {
00572             gc = XCreateGC( display, window, 0, &values );
00573 
00574             xvImage = ( XvImage * ) XvShmCreateImage( display, port, 0x32595559, 0, width, height, &shmInfo );
00575 
00576             shmInfo.shmid = shmget( IPC_PRIVATE, xvImage->data_size, IPC_CREAT | 0777 );
00577             if (shmInfo.shmid < 0) {
00578                 perror("shmget");
00579                 gotPort = false;
00580             } else {
00581                 shmInfo.shmaddr = ( char * ) shmat( shmInfo.shmid, 0, 0 );
00582                 xvImage->data = shmInfo.shmaddr;
00583                 shmInfo.readOnly = 0;
00584                 if ( !XShmAttach( gdk_display, &shmInfo ) )
00585                 {
00586                     gotPort = false;
00587                 }
00588                 XSync( display, false );
00589                 shmctl( shmInfo.shmid, IPC_RMID, 0 );
00590 #if 0
00591                 xvImage = ( XvImage * ) XvCreateImage( display, port, 0x32595559, pix, width , height );
00592 #endif
00593             }
00594         }
00595     }
00596     else
00597     {
00598         gotPort = false;
00599     }
00600 }


Public Member Functions
	XvDisplayer (GtkWidget *drawingarea, int width, int height, bool isPAL, bool isWidescreen)
	XVideo Constructor.
	~XvDisplayer ()
bool	usable ()
	Indicates if an object can be used to render images on the running system.
DisplayerInput	format ()
	Indicates the format required by the abstract put method.
Protected Member Functions
void	put (void *image)
Private Attributes
bool	gotPort
int	grabbedPort
GtkWidget *	drawingarea
Display *	display
Window	window
GC	gc
XGCValues	values
XvImage *	xvImage
unsigned int	port
XShmSegmentInfo	shmInfo
char	pix [MAX_WIDTH MAX_HEIGHT 4]
bool	isPAL
bool	isWidescreen

XvDisplayer Class Reference

Public Member Functions

Protected Member Functions

Private Attributes

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation