[sdl_omap.git] / SDL_x11yuv.c

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2009 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

/* This is the XFree86 Xv extension implementation of YUV video overlays */

#if SDL_VIDEO_DRIVER_X11_XV

#include <X11/Xlib.h>
#ifndef NO_SHARED_MEMORY
#include <sys/ipc.h>
#include <sys/shm.h>
#include <X11/extensions/XShm.h>
#endif
#include "../Xext/extensions/Xvlib.h"

#include "SDL_x11yuv_c.h"
#include "../SDL_yuvfuncs.h"

#define XFREE86_REFRESH_HACK
#ifdef XFREE86_REFRESH_HACK
#include "SDL_x11image_c.h"
#endif

/* Workaround when pitch != width */
#define PITCH_WORKAROUND

/* Workaround intel i810 video overlay waiting with failing until the
   first Xv[Shm]PutImage call <sigh> */
#define INTEL_XV_BADALLOC_WORKAROUND

/* Fix for the NVidia GeForce 2 - use the last available adaptor */
/*#define USE_LAST_ADAPTOR*/  /* Apparently the NVidia drivers are fixed */

/* The functions used to manipulate software video overlays */
static struct private_yuvhwfuncs x11_yuvfuncs = {
	X11_LockYUVOverlay,
	X11_UnlockYUVOverlay,
	X11_DisplayYUVOverlay,
	X11_FreeYUVOverlay
};

struct private_yuvhwdata {
	int port;
#ifndef NO_SHARED_MEMORY
	int yuv_use_mitshm;
	XShmSegmentInfo yuvshm;
#endif
	SDL_NAME(XvImage) *image;
};


static int (*X_handler)(Display *, XErrorEvent *) = NULL;

#ifndef NO_SHARED_MEMORY
/* Shared memory error handler routine */
static int shm_error;
static int shm_errhandler(Display *d, XErrorEvent *e)
{
        if ( e->error_code == BadAccess ) {
        	shm_error = True;
        	return(0);
        } else
		return(X_handler(d,e));
}
#endif /* !NO_SHARED_MEMORY */

static int xv_error;
static int xv_errhandler(Display *d, XErrorEvent *e)
{
        if ( e->error_code == BadMatch ) {
        	xv_error = True;
        	return(0);
        } else
		return(X_handler(d,e));
}

#ifdef INTEL_XV_BADALLOC_WORKAROUND
static int intel_errhandler(Display *d, XErrorEvent *e)
{
        if ( e->error_code == BadAlloc ) {
        	xv_error = True;
        	return(0);
        } else
		return(X_handler(d,e));
}

static void X11_ClearYUVOverlay(SDL_Overlay *overlay)
{
	int x,y;
	    
	switch (overlay->format)
	{
	case SDL_YV12_OVERLAY:
	case SDL_IYUV_OVERLAY:
		for (y = 0; y < overlay->h; y++)
			memset(overlay->pixels[0] + y * overlay->pitches[0],
				0, overlay->w);
		
		for (y = 0; y < (overlay->h / 2); y++)
		{
			memset(overlay->pixels[1] + y * overlay->pitches[1],
				-128, overlay->w / 2);
			memset(overlay->pixels[2] + y * overlay->pitches[2],
				-128, overlay->w / 2);
		}
		break;
	case SDL_YUY2_OVERLAY:
	case SDL_YVYU_OVERLAY:
		for (y = 0; y < overlay->h; y++)
		{
			for (x = 0; x < overlay->w; x += 2)
			{
				Uint8 *pixel_pair = overlay->pixels[0] +
					y * overlay->pitches[0] + x * 2;
				pixel_pair[0] = 0;
				pixel_pair[1] = -128;
				pixel_pair[2] = 0;
				pixel_pair[3] = -128;
			}
		}
		break;
	case SDL_UYVY_OVERLAY:
		for (y = 0; y < overlay->h; y++)
		{
			for (x = 0; x < overlay->w; x += 2)
			{
				Uint8 *pixel_pair = overlay->pixels[0] +
					y * overlay->pitches[0] + x * 2;
				pixel_pair[0] = -128;
				pixel_pair[1] = 0;
				pixel_pair[2] = -128;
				pixel_pair[3] = 0;
			}
		}
		break;
	}
}
#endif

SDL_Overlay *X11_CreateYUVOverlay(_THIS, int width, int height, Uint32 format, SDL_Surface *display)
{
	SDL_Overlay *overlay;
	struct private_yuvhwdata *hwdata;
	int xv_port;
	unsigned int i, j, k;
	unsigned int adaptors;
	SDL_NAME(XvAdaptorInfo) *ainfo;
	int bpp;
#ifndef NO_SHARED_MEMORY
	XShmSegmentInfo *yuvshm;
#endif
#ifdef INTEL_XV_BADALLOC_WORKAROUND
	int intel_adapter = False;
#endif

	/* Look for the XVideo extension with a valid port for this format */
	xv_port = -1;
	if ( (Success == SDL_NAME(XvQueryExtension)(GFX_Display, &j, &j, &j, &j, &j)) &&
	     (Success == SDL_NAME(XvQueryAdaptors)(GFX_Display,
	                                 RootWindow(GFX_Display, SDL_Screen),
	                                 &adaptors, &ainfo)) ) {
#ifdef USE_LAST_ADAPTOR
		for ( i=0; i < adaptors; ++i )
#else
		for ( i=0; (i < adaptors) && (xv_port == -1); ++i )
#endif /* USE_LAST_ADAPTOR */
		{
			/* Check to see if the visual can be used */
			if ( BUGGY_XFREE86(<=, 4001) ) {
				int visual_ok = 0;
				for ( j=0; j<ainfo[i].num_formats; ++j ) {
					if ( ainfo[i].formats[j].visual_id ==
							SDL_Visual->visualid ) {
						visual_ok = 1;
						break;
					}
				}
				if ( ! visual_ok ) {
					continue;
				}
			}
#ifdef INTEL_XV_BADALLOC_WORKAROUND
			if ( !strcmp(ainfo[i].name, "Intel(R) Video Overla"))
				intel_adapter = True;
			else
				intel_adapter = False;
#endif
			if ( (ainfo[i].type & XvInputMask) &&
			     (ainfo[i].type & XvImageMask) ) {
				int num_formats;
				SDL_NAME(XvImageFormatValues) *formats;
				formats = SDL_NAME(XvListImageFormats)(GFX_Display,
				              ainfo[i].base_id, &num_formats);
#ifdef USE_LAST_ADAPTOR
				for ( j=0; j < num_formats; ++j )
#else
				for ( j=0; (j < num_formats) && (xv_port == -1); ++j )
#endif /* USE_LAST_ADAPTOR */
				{
					if ( (Uint32)formats[j].id == format ) {
						for ( k=0; k < ainfo[i].num_ports; ++k ) {
							if ( Success == SDL_NAME(XvGrabPort)(GFX_Display, ainfo[i].base_id+k, CurrentTime) ) {
								xv_port = ainfo[i].base_id+k;
								break;
							}
						}
					}
				}
				if ( formats ) {
					XFree(formats);
				}
			}
		}
		SDL_NAME(XvFreeAdaptorInfo)(ainfo);
	}

	/* Precalculate the bpp for the pitch workaround below */
	switch (format) {
	    /* Add any other cases we need to support... */
	    case SDL_YUY2_OVERLAY:
	    case SDL_UYVY_OVERLAY:
	    case SDL_YVYU_OVERLAY:
		bpp = 2;
		break;
	    default:
		bpp = 1;
		break;
	}

#if 0
    /*
     * !!! FIXME:
     * "Here are some diffs for X11 and yuv.  Note that the last part 2nd
     *  diff should probably be a new call to XvQueryAdaptorFree with ainfo
     *  and the number of adaptors, instead of the loop through like I did."
     *
     *  ACHTUNG: This is broken! It looks like XvFreeAdaptorInfo does this
     *  for you, so we end up with a double-free. I need to look at this
     *  more closely...  --ryan.
     */
 	for ( i=0; i < adaptors; ++i ) {
 	  if (ainfo[i].name != NULL) Xfree(ainfo[i].name);
 	  if (ainfo[i].formats != NULL) Xfree(ainfo[i].formats);
   	}
 	Xfree(ainfo);
#endif

	if ( xv_port == -1 ) {
		SDL_SetError("No available video ports for requested format");
		return(NULL);
	}

	/* Enable auto-painting of the overlay colorkey */
	{
		static const char *attr[] = { "XV_AUTOPAINT_COLORKEY", "XV_AUTOPAINT_COLOURKEY" };
		unsigned int i;

		SDL_NAME(XvSelectPortNotify)(GFX_Display, xv_port, True);
		X_handler = XSetErrorHandler(xv_errhandler);
		for ( i=0; i < sizeof(attr)/(sizeof attr[0]); ++i ) {
			Atom a;

			xv_error = False;
			a = XInternAtom(GFX_Display, attr[i], True);
			if ( a != None ) {
     				SDL_NAME(XvSetPortAttribute)(GFX_Display, xv_port, a, 1);
				XSync(GFX_Display, True);
				if ( ! xv_error ) {
					break;
				}
			}
		}
		XSetErrorHandler(X_handler);
		SDL_NAME(XvSelectPortNotify)(GFX_Display, xv_port, False);
	}

	/* Create the overlay structure */
	overlay = (SDL_Overlay *)SDL_malloc(sizeof *overlay);
	if ( overlay == NULL ) {
		SDL_NAME(XvUngrabPort)(GFX_Display, xv_port, CurrentTime);
		SDL_OutOfMemory();
		return(NULL);
	}
	SDL_memset(overlay, 0, (sizeof *overlay));

	/* Fill in the basic members */
	overlay->format = format;
	overlay->w = width;
	overlay->h = height;

	/* Set up the YUV surface function structure */
	overlay->hwfuncs = &x11_yuvfuncs;
	overlay->hw_overlay = 1;

	/* Create the pixel data and lookup tables */
	hwdata = (struct private_yuvhwdata *)SDL_malloc(sizeof *hwdata);
	overlay->hwdata = hwdata;
	if ( hwdata == NULL ) {
		SDL_NAME(XvUngrabPort)(GFX_Display, xv_port, CurrentTime);
		SDL_OutOfMemory();
		SDL_FreeYUVOverlay(overlay);
		return(NULL);
	}
	hwdata->port = xv_port;
#ifndef NO_SHARED_MEMORY
	yuvshm = &hwdata->yuvshm;
	SDL_memset(yuvshm, 0, sizeof(*yuvshm));
	hwdata->image = SDL_NAME(XvShmCreateImage)(GFX_Display, xv_port, format,
						   0, width, height, yuvshm);
#ifdef PITCH_WORKAROUND
	if ( hwdata->image != NULL && hwdata->image->pitches[0] != (width*bpp) ) {
		/* Ajust overlay width according to pitch */ 
		XFree(hwdata->image);
		width = hwdata->image->pitches[0] / bpp;
		hwdata->image = SDL_NAME(XvShmCreateImage)(GFX_Display, xv_port, format,
							   0, width, height, yuvshm);
	}
#endif /* PITCH_WORKAROUND */
	hwdata->yuv_use_mitshm = (hwdata->image != NULL);
	if ( hwdata->yuv_use_mitshm ) {
		yuvshm->shmid = shmget(IPC_PRIVATE, hwdata->image->data_size,
				       IPC_CREAT | 0777);
		if ( yuvshm->shmid >= 0 ) {
			yuvshm->shmaddr = (char *)shmat(yuvshm->shmid, 0, 0);
			yuvshm->readOnly = False;
			if ( yuvshm->shmaddr != (char *)-1 ) {
				shm_error = False;
				X_handler = XSetErrorHandler(shm_errhandler);
				XShmAttach(GFX_Display, yuvshm);
				XSync(GFX_Display, True);
				XSetErrorHandler(X_handler);
				if ( shm_error )
					shmdt(yuvshm->shmaddr);
			} else {
				shm_error = True;
			}
			shmctl(yuvshm->shmid, IPC_RMID, NULL);
		} else {
			shm_error = True;
		}
		if ( shm_error ) {
			XFree(hwdata->image);
			hwdata->yuv_use_mitshm = 0;
		} else {
			hwdata->image->data = yuvshm->shmaddr;
		}
	}
	if ( !hwdata->yuv_use_mitshm )
#endif /* NO_SHARED_MEMORY */
	{
		hwdata->image = SDL_NAME(XvCreateImage)(GFX_Display, xv_port, format,
							0, width, height);

#ifdef PITCH_WORKAROUND
		if ( hwdata->image != NULL && hwdata->image->pitches[0] != (width*bpp) ) {
			/* Ajust overlay width according to pitch */ 
			XFree(hwdata->image);
			width = hwdata->image->pitches[0] / bpp;
			hwdata->image = SDL_NAME(XvCreateImage)(GFX_Display, xv_port, format,
								0, width, height);
		}
#endif /* PITCH_WORKAROUND */
		if ( hwdata->image == NULL ) {
			SDL_SetError("Couldn't create XVideo image");
			SDL_FreeYUVOverlay(overlay);
			return(NULL);
		}
		hwdata->image->data = SDL_malloc(hwdata->image->data_size);
		if ( hwdata->image->data == NULL ) {
			SDL_OutOfMemory();
			SDL_FreeYUVOverlay(overlay);
			return(NULL);
		}
	}

	/* Find the pitch and offset values for the overlay */
	overlay->planes = hwdata->image->num_planes;
	overlay->pitches = (Uint16 *)SDL_malloc(overlay->planes * sizeof(Uint16));
	overlay->pixels = (Uint8 **)SDL_malloc(overlay->planes * sizeof(Uint8 *));
	if ( !overlay->pitches || !overlay->pixels ) {
		SDL_OutOfMemory();
		SDL_FreeYUVOverlay(overlay);
		return(NULL);
	}
	for ( i=0; i<overlay->planes; ++i ) {
		overlay->pitches[i] = hwdata->image->pitches[i];
		overlay->pixels[i] = (Uint8 *)hwdata->image->data +
		                              hwdata->image->offsets[i];
	}

#ifdef XFREE86_REFRESH_HACK
	/* Work around an XFree86 X server bug (?)
	   We can't perform normal updates in windows that have video
	   being output to them.  See SDL_x11image.c for more details.
	 */
	X11_DisableAutoRefresh(this);
#endif

#ifdef INTEL_XV_BADALLOC_WORKAROUND
	/* HACK, GRRR sometimes (i810) creating the overlay succeeds, but the
	   first call to XvShm[Put]Image to a mapped window fails with:
	   "BadAlloc (insufficient resources for operation)". This happens with
	   certain formats when the XvImage is too large to the i810's liking.

	   We work around this by doing a test XvShm[Put]Image with a black
	   Xv image, this may cause some flashing, so only do this check if we
	   are running on an intel Xv-adapter. */
	if (intel_adapter)
	{
		xv_error = False;
		X_handler = XSetErrorHandler(intel_errhandler);
		
		X11_ClearYUVOverlay(overlay);

		/* We set the destination height and width to 1 pixel to avoid
		   putting a large black rectangle over the screen, thus
		   strongly reducing possible flashing. */
#ifndef NO_SHARED_MEMORY
		if ( hwdata->yuv_use_mitshm ) {
			SDL_NAME(XvShmPutImage)(GFX_Display, hwdata->port,
				SDL_Window, SDL_GC,
				hwdata->image,
				0, 0, overlay->w, overlay->h,
				0, 0, 1, 1, False);
		}
		else
#endif
		{
			SDL_NAME(XvPutImage)(GFX_Display, hwdata->port,
				SDL_Window, SDL_GC,
				hwdata->image,
				0, 0, overlay->w, overlay->h,
				0, 0, 1, 1);
		}
		XSync(GFX_Display, False);
		XSetErrorHandler(X_handler);

		if (xv_error)
		{
			X11_FreeYUVOverlay(this, overlay);
			return NULL;
		}
		/* Repair the (1 pixel worth of) damage we've just done */
		X11_RefreshDisplay(this);
	}
#endif

	/* We're all done.. */
	return(overlay);
}

int X11_LockYUVOverlay(_THIS, SDL_Overlay *overlay)
{
	return(0);
}

void X11_UnlockYUVOverlay(_THIS, SDL_Overlay *overlay)
{
	return;
}

int X11_DisplayYUVOverlay(_THIS, SDL_Overlay *overlay, SDL_Rect *src, SDL_Rect *dst)
{
	struct private_yuvhwdata *hwdata;

	hwdata = overlay->hwdata;

#ifndef NO_SHARED_MEMORY
	if ( hwdata->yuv_use_mitshm ) {
		SDL_NAME(XvShmPutImage)(GFX_Display, hwdata->port, SDL_Window, SDL_GC,
	              hwdata->image,
		      src->x, src->y, src->w, src->h,
		      dst->x, dst->y, dst->w, dst->h, False);
	}
	else
#endif
	{
		SDL_NAME(XvPutImage)(GFX_Display, hwdata->port, SDL_Window, SDL_GC,
				     hwdata->image,
		                     src->x, src->y, src->w, src->h,
		                     dst->x, dst->y, dst->w, dst->h);
	}
	XSync(GFX_Display, False);
	return(0);
}

void X11_FreeYUVOverlay(_THIS, SDL_Overlay *overlay)
{
	struct private_yuvhwdata *hwdata;

	hwdata = overlay->hwdata;
	if ( hwdata ) {
		SDL_NAME(XvUngrabPort)(GFX_Display, hwdata->port, CurrentTime);
#ifndef NO_SHARED_MEMORY
		if ( hwdata->yuv_use_mitshm ) {
			XShmDetach(GFX_Display, &hwdata->yuvshm);
			shmdt(hwdata->yuvshm.shmaddr);
		}
#endif
		if ( hwdata->image ) {
			XFree(hwdata->image);
		}
		SDL_free(hwdata);
	}
	if ( overlay->pitches ) {
		SDL_free(overlay->pitches);
		overlay->pitches = NULL;
	}
	if ( overlay->pixels ) {
		SDL_free(overlay->pixels);
		overlay->pixels = NULL;
	}
#ifdef XFREE86_REFRESH_HACK
	X11_EnableAutoRefresh(this);
#endif
}

#endif /* SDL_VIDEO_DRIVER_X11_XV */
Commit	Line	Data
	1	/*
	2	SDL - Simple DirectMedia Layer
	3	Copyright (C) 1997-2009 Sam Lantinga
	4
	5	This library is free software; you can redistribute it and/or
	6	modify it under the terms of the GNU Lesser General Public
	7	License as published by the Free Software Foundation; either
	8	version 2.1 of the License, or (at your option) any later version.
	9
	10	This library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	Lesser General Public License for more details.
	14
	15	You should have received a copy of the GNU Lesser General Public
	16	License along with this library; if not, write to the Free Software
	17	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	18
	19	Sam Lantinga
	20	slouken@libsdl.org
	21	*/
	22	#include "SDL_config.h"
	23
	24	/* This is the XFree86 Xv extension implementation of YUV video overlays */
	25
	26	#if SDL_VIDEO_DRIVER_X11_XV
	27
	28	#include <X11/Xlib.h>
	29	#ifndef NO_SHARED_MEMORY
	30	#include <sys/ipc.h>
	31	#include <sys/shm.h>
	32	#include <X11/extensions/XShm.h>
	33	#endif
	34	#include "../Xext/extensions/Xvlib.h"
	35
	36	#include "SDL_x11yuv_c.h"
	37	#include "../SDL_yuvfuncs.h"
	38
	39	#define XFREE86_REFRESH_HACK
	40	#ifdef XFREE86_REFRESH_HACK
	41	#include "SDL_x11image_c.h"
	42	#endif
	43
	44	/* Workaround when pitch != width */
	45	#define PITCH_WORKAROUND
	46
	47	/* Workaround intel i810 video overlay waiting with failing until the
	48	first Xv[Shm]PutImage call <sigh> */
	49	#define INTEL_XV_BADALLOC_WORKAROUND
	50
	51	/* Fix for the NVidia GeForce 2 - use the last available adaptor */
	52	/#define USE_LAST_ADAPTOR/ /* Apparently the NVidia drivers are fixed */
	53
	54	/* The functions used to manipulate software video overlays */
	55	static struct private_yuvhwfuncs x11_yuvfuncs = {
	56	X11_LockYUVOverlay,
	57	X11_UnlockYUVOverlay,
	58	X11_DisplayYUVOverlay,
	59	X11_FreeYUVOverlay
	60	};
	61
	62	struct private_yuvhwdata {
	63	int port;
	64	#ifndef NO_SHARED_MEMORY
	65	int yuv_use_mitshm;
	66	XShmSegmentInfo yuvshm;
	67	#endif
	68	SDL_NAME(XvImage) *image;
	69	};
	70
	71
	72	static int (X_handler)(Display , XErrorEvent *) = NULL;
	73
	74	#ifndef NO_SHARED_MEMORY
	75	/* Shared memory error handler routine */
	76	static int shm_error;
	77	static int shm_errhandler(Display d, XErrorEvent e)
	78	{
	79	if ( e->error_code == BadAccess ) {
	80	shm_error = True;
	81	return(0);
	82	} else
	83	return(X_handler(d,e));
	84	}
	85	#endif /* !NO_SHARED_MEMORY */
	86
	87	static int xv_error;
	88	static int xv_errhandler(Display d, XErrorEvent e)
	89	{
	90	if ( e->error_code == BadMatch ) {
	91	xv_error = True;
	92	return(0);
	93	} else
	94	return(X_handler(d,e));
	95	}
	96
	97	#ifdef INTEL_XV_BADALLOC_WORKAROUND
	98	static int intel_errhandler(Display d, XErrorEvent e)
	99	{
	100	if ( e->error_code == BadAlloc ) {
	101	xv_error = True;
	102	return(0);
	103	} else
	104	return(X_handler(d,e));
	105	}
	106
	107	static void X11_ClearYUVOverlay(SDL_Overlay *overlay)
	108	{
	109	int x,y;
	110
	111	switch (overlay->format)
	112	{
	113	case SDL_YV12_OVERLAY:
	114	case SDL_IYUV_OVERLAY:
	115	for (y = 0; y < overlay->h; y++)
	116	memset(overlay->pixels[0] + y * overlay->pitches[0],
	117	0, overlay->w);
	118
	119	for (y = 0; y < (overlay->h / 2); y++)
	120	{
	121	memset(overlay->pixels[1] + y * overlay->pitches[1],
	122	-128, overlay->w / 2);
	123	memset(overlay->pixels[2] + y * overlay->pitches[2],
	124	-128, overlay->w / 2);
	125	}
	126	break;
	127	case SDL_YUY2_OVERLAY:
	128	case SDL_YVYU_OVERLAY:
	129	for (y = 0; y < overlay->h; y++)
	130	{
	131	for (x = 0; x < overlay->w; x += 2)
	132	{
	133	Uint8 *pixel_pair = overlay->pixels[0] +
	134	y * overlay->pitches[0] + x * 2;
	135	pixel_pair[0] = 0;
	136	pixel_pair[1] = -128;
	137	pixel_pair[2] = 0;
	138	pixel_pair[3] = -128;
	139	}
	140	}
	141	break;
	142	case SDL_UYVY_OVERLAY:
	143	for (y = 0; y < overlay->h; y++)
	144	{
	145	for (x = 0; x < overlay->w; x += 2)
	146	{
	147	Uint8 *pixel_pair = overlay->pixels[0] +
	148	y * overlay->pitches[0] + x * 2;
	149	pixel_pair[0] = -128;
	150	pixel_pair[1] = 0;
	151	pixel_pair[2] = -128;
	152	pixel_pair[3] = 0;
	153	}
	154	}
	155	break;
	156	}
	157	}
	158	#endif
	159
	160	SDL_Overlay X11_CreateYUVOverlay(_THIS, int width, int height, Uint32 format, SDL_Surface display)
	161	{
	162	SDL_Overlay *overlay;
	163	struct private_yuvhwdata *hwdata;
	164	int xv_port;
	165	unsigned int i, j, k;
	166	unsigned int adaptors;
	167	SDL_NAME(XvAdaptorInfo) *ainfo;
	168	int bpp;
	169	#ifndef NO_SHARED_MEMORY
	170	XShmSegmentInfo *yuvshm;
	171	#endif
	172	#ifdef INTEL_XV_BADALLOC_WORKAROUND
	173	int intel_adapter = False;
	174	#endif
	175
	176	/* Look for the XVideo extension with a valid port for this format */
	177	xv_port = -1;
	178	if ( (Success == SDL_NAME(XvQueryExtension)(GFX_Display, &j, &j, &j, &j, &j)) &&
	179	(Success == SDL_NAME(XvQueryAdaptors)(GFX_Display,
	180	RootWindow(GFX_Display, SDL_Screen),
	181	&adaptors, &ainfo)) ) {
	182	#ifdef USE_LAST_ADAPTOR
	183	for ( i=0; i < adaptors; ++i )
	184	#else
	185	for ( i=0; (i < adaptors) && (xv_port == -1); ++i )
	186	#endif /* USE_LAST_ADAPTOR */
	187	{
	188	/* Check to see if the visual can be used */
	189	if ( BUGGY_XFREE86(<=, 4001) ) {
	190	int visual_ok = 0;
	191	for ( j=0; j<ainfo[i].num_formats; ++j ) {
	192	if ( ainfo[i].formats[j].visual_id ==
	193	SDL_Visual->visualid ) {
	194	visual_ok = 1;
	195	break;
	196	}
	197	}
	198	if ( ! visual_ok ) {
	199	continue;
	200	}
	201	}
	202	#ifdef INTEL_XV_BADALLOC_WORKAROUND
	203	if ( !strcmp(ainfo[i].name, "Intel(R) Video Overla"))
	204	intel_adapter = True;
	205	else
	206	intel_adapter = False;
	207	#endif
	208	if ( (ainfo[i].type & XvInputMask) &&
	209	(ainfo[i].type & XvImageMask) ) {
	210	int num_formats;
	211	SDL_NAME(XvImageFormatValues) *formats;
	212	formats = SDL_NAME(XvListImageFormats)(GFX_Display,
	213	ainfo[i].base_id, &num_formats);
	214	#ifdef USE_LAST_ADAPTOR
	215	for ( j=0; j < num_formats; ++j )
	216	#else
	217	for ( j=0; (j < num_formats) && (xv_port == -1); ++j )
	218	#endif /* USE_LAST_ADAPTOR */
	219	{
	220	if ( (Uint32)formats[j].id == format ) {
	221	for ( k=0; k < ainfo[i].num_ports; ++k ) {
	222	if ( Success == SDL_NAME(XvGrabPort)(GFX_Display, ainfo[i].base_id+k, CurrentTime) ) {
	223	xv_port = ainfo[i].base_id+k;
	224	break;
	225	}
	226	}
	227	}
	228	}
	229	if ( formats ) {
	230	XFree(formats);
	231	}
	232	}
	233	}
	234	SDL_NAME(XvFreeAdaptorInfo)(ainfo);
	235	}
	236
	237	/* Precalculate the bpp for the pitch workaround below */
	238	switch (format) {
	239	/* Add any other cases we need to support... */
	240	case SDL_YUY2_OVERLAY:
	241	case SDL_UYVY_OVERLAY:
	242	case SDL_YVYU_OVERLAY:
	243	bpp = 2;
	244	break;
	245	default:
	246	bpp = 1;
	247	break;
	248	}
	249
	250	#if 0
	251	/*
	252	* !!! FIXME:
	253	* "Here are some diffs for X11 and yuv. Note that the last part 2nd
	254	* diff should probably be a new call to XvQueryAdaptorFree with ainfo
	255	* and the number of adaptors, instead of the loop through like I did."
	256	*
	257	* ACHTUNG: This is broken! It looks like XvFreeAdaptorInfo does this
	258	* for you, so we end up with a double-free. I need to look at this
	259	* more closely... --ryan.
	260	*/
	261	for ( i=0; i < adaptors; ++i ) {
	262	if (ainfo[i].name != NULL) Xfree(ainfo[i].name);
	263	if (ainfo[i].formats != NULL) Xfree(ainfo[i].formats);
	264	}
	265	Xfree(ainfo);
	266	#endif
	267
	268	if ( xv_port == -1 ) {
	269	SDL_SetError("No available video ports for requested format");
	270	return(NULL);
	271	}
	272
	273	/* Enable auto-painting of the overlay colorkey */
	274	{
	275	static const char *attr[] = { "XV_AUTOPAINT_COLORKEY", "XV_AUTOPAINT_COLOURKEY" };
	276	unsigned int i;
	277
	278	SDL_NAME(XvSelectPortNotify)(GFX_Display, xv_port, True);
	279	X_handler = XSetErrorHandler(xv_errhandler);
	280	for ( i=0; i < sizeof(attr)/(sizeof attr[0]); ++i ) {
	281	Atom a;
	282
	283	xv_error = False;
	284	a = XInternAtom(GFX_Display, attr[i], True);
	285	if ( a != None ) {
	286	SDL_NAME(XvSetPortAttribute)(GFX_Display, xv_port, a, 1);
	287	XSync(GFX_Display, True);
	288	if ( ! xv_error ) {
	289	break;
	290	}
	291	}
	292	}
	293	XSetErrorHandler(X_handler);
	294	SDL_NAME(XvSelectPortNotify)(GFX_Display, xv_port, False);
	295	}
	296
	297	/* Create the overlay structure */
	298	overlay = (SDL_Overlay )SDL_malloc(sizeof overlay);
	299	if ( overlay == NULL ) {
	300	SDL_NAME(XvUngrabPort)(GFX_Display, xv_port, CurrentTime);
	301	SDL_OutOfMemory();
	302	return(NULL);
	303	}
	304	SDL_memset(overlay, 0, (sizeof *overlay));
	305
	306	/* Fill in the basic members */
	307	overlay->format = format;
	308	overlay->w = width;
	309	overlay->h = height;
	310
	311	/* Set up the YUV surface function structure */
	312	overlay->hwfuncs = &x11_yuvfuncs;
	313	overlay->hw_overlay = 1;
	314
	315	/* Create the pixel data and lookup tables */
	316	hwdata = (struct private_yuvhwdata )SDL_malloc(sizeof hwdata);
	317	overlay->hwdata = hwdata;
	318	if ( hwdata == NULL ) {
	319	SDL_NAME(XvUngrabPort)(GFX_Display, xv_port, CurrentTime);
	320	SDL_OutOfMemory();
	321	SDL_FreeYUVOverlay(overlay);
	322	return(NULL);
	323	}
	324	hwdata->port = xv_port;
	325	#ifndef NO_SHARED_MEMORY
	326	yuvshm = &hwdata->yuvshm;
	327	SDL_memset(yuvshm, 0, sizeof(*yuvshm));
	328	hwdata->image = SDL_NAME(XvShmCreateImage)(GFX_Display, xv_port, format,
	329	0, width, height, yuvshm);
	330	#ifdef PITCH_WORKAROUND
	331	if ( hwdata->image != NULL && hwdata->image->pitches[0] != (width*bpp) ) {
	332	/* Ajust overlay width according to pitch */
	333	XFree(hwdata->image);
	334	width = hwdata->image->pitches[0] / bpp;
	335	hwdata->image = SDL_NAME(XvShmCreateImage)(GFX_Display, xv_port, format,
	336	0, width, height, yuvshm);
	337	}
	338	#endif /* PITCH_WORKAROUND */
	339	hwdata->yuv_use_mitshm = (hwdata->image != NULL);
	340	if ( hwdata->yuv_use_mitshm ) {
	341	yuvshm->shmid = shmget(IPC_PRIVATE, hwdata->image->data_size,
	342	IPC_CREAT \| 0777);
	343	if ( yuvshm->shmid >= 0 ) {
	344	yuvshm->shmaddr = (char *)shmat(yuvshm->shmid, 0, 0);
	345	yuvshm->readOnly = False;
	346	if ( yuvshm->shmaddr != (char *)-1 ) {
	347	shm_error = False;
	348	X_handler = XSetErrorHandler(shm_errhandler);
	349	XShmAttach(GFX_Display, yuvshm);
	350	XSync(GFX_Display, True);
	351	XSetErrorHandler(X_handler);
	352	if ( shm_error )
	353	shmdt(yuvshm->shmaddr);
	354	} else {
	355	shm_error = True;
	356	}
	357	shmctl(yuvshm->shmid, IPC_RMID, NULL);
	358	} else {
	359	shm_error = True;
	360	}
	361	if ( shm_error ) {
	362	XFree(hwdata->image);
	363	hwdata->yuv_use_mitshm = 0;
	364	} else {
	365	hwdata->image->data = yuvshm->shmaddr;
	366	}
	367	}
	368	if ( !hwdata->yuv_use_mitshm )
	369	#endif /* NO_SHARED_MEMORY */
	370	{
	371	hwdata->image = SDL_NAME(XvCreateImage)(GFX_Display, xv_port, format,
	372	0, width, height);
	373
	374	#ifdef PITCH_WORKAROUND
	375	if ( hwdata->image != NULL && hwdata->image->pitches[0] != (width*bpp) ) {
	376	/* Ajust overlay width according to pitch */
	377	XFree(hwdata->image);
	378	width = hwdata->image->pitches[0] / bpp;
	379	hwdata->image = SDL_NAME(XvCreateImage)(GFX_Display, xv_port, format,
	380	0, width, height);
	381	}
	382	#endif /* PITCH_WORKAROUND */
	383	if ( hwdata->image == NULL ) {
	384	SDL_SetError("Couldn't create XVideo image");
	385	SDL_FreeYUVOverlay(overlay);
	386	return(NULL);
	387	}
	388	hwdata->image->data = SDL_malloc(hwdata->image->data_size);
	389	if ( hwdata->image->data == NULL ) {
	390	SDL_OutOfMemory();
	391	SDL_FreeYUVOverlay(overlay);
	392	return(NULL);
	393	}
	394	}
	395
	396	/* Find the pitch and offset values for the overlay */
	397	overlay->planes = hwdata->image->num_planes;
	398	overlay->pitches = (Uint16 )SDL_malloc(overlay->planes sizeof(Uint16));
	399	overlay->pixels = (Uint8 *)SDL_malloc(overlay->planes sizeof(Uint8 *));
	400	if ( !overlay->pitches \|\| !overlay->pixels ) {
	401	SDL_OutOfMemory();
	402	SDL_FreeYUVOverlay(overlay);
	403	return(NULL);
	404	}
	405	for ( i=0; i<overlay->planes; ++i ) {
	406	overlay->pitches[i] = hwdata->image->pitches[i];
	407	overlay->pixels[i] = (Uint8 *)hwdata->image->data +
	408	hwdata->image->offsets[i];
	409	}
	410
	411	#ifdef XFREE86_REFRESH_HACK
	412	/* Work around an XFree86 X server bug (?)
	413	We can't perform normal updates in windows that have video
	414	being output to them. See SDL_x11image.c for more details.
	415	*/
	416	X11_DisableAutoRefresh(this);
	417	#endif
	418
	419	#ifdef INTEL_XV_BADALLOC_WORKAROUND
	420	/* HACK, GRRR sometimes (i810) creating the overlay succeeds, but the
	421	first call to XvShm[Put]Image to a mapped window fails with:
	422	"BadAlloc (insufficient resources for operation)". This happens with
	423	certain formats when the XvImage is too large to the i810's liking.
	424
	425	We work around this by doing a test XvShm[Put]Image with a black
	426	Xv image, this may cause some flashing, so only do this check if we
	427	are running on an intel Xv-adapter. */
	428	if (intel_adapter)
	429	{
	430	xv_error = False;
	431	X_handler = XSetErrorHandler(intel_errhandler);
	432
	433	X11_ClearYUVOverlay(overlay);
	434
	435	/* We set the destination height and width to 1 pixel to avoid
	436	putting a large black rectangle over the screen, thus
	437	strongly reducing possible flashing. */
	438	#ifndef NO_SHARED_MEMORY
	439	if ( hwdata->yuv_use_mitshm ) {
	440	SDL_NAME(XvShmPutImage)(GFX_Display, hwdata->port,
	441	SDL_Window, SDL_GC,
	442	hwdata->image,
	443	0, 0, overlay->w, overlay->h,
	444	0, 0, 1, 1, False);
	445	}
	446	else
	447	#endif
	448	{
	449	SDL_NAME(XvPutImage)(GFX_Display, hwdata->port,
	450	SDL_Window, SDL_GC,
	451	hwdata->image,
	452	0, 0, overlay->w, overlay->h,
	453	0, 0, 1, 1);
	454	}
	455	XSync(GFX_Display, False);
	456	XSetErrorHandler(X_handler);
	457
	458	if (xv_error)
	459	{
	460	X11_FreeYUVOverlay(this, overlay);
	461	return NULL;
	462	}
	463	/* Repair the (1 pixel worth of) damage we've just done */
	464	X11_RefreshDisplay(this);
	465	}
	466	#endif
	467
	468	/* We're all done.. */
	469	return(overlay);
	470	}
	471
	472	int X11_LockYUVOverlay(_THIS, SDL_Overlay *overlay)
	473	{
	474	return(0);
	475	}
	476
	477	void X11_UnlockYUVOverlay(_THIS, SDL_Overlay *overlay)
	478	{
	479	return;
	480	}
	481
	482	int X11_DisplayYUVOverlay(_THIS, SDL_Overlay overlay, SDL_Rect src, SDL_Rect *dst)
	483	{
	484	struct private_yuvhwdata *hwdata;
	485
	486	hwdata = overlay->hwdata;
	487
	488	#ifndef NO_SHARED_MEMORY
	489	if ( hwdata->yuv_use_mitshm ) {
	490	SDL_NAME(XvShmPutImage)(GFX_Display, hwdata->port, SDL_Window, SDL_GC,
	491	hwdata->image,
	492	src->x, src->y, src->w, src->h,
	493	dst->x, dst->y, dst->w, dst->h, False);
	494	}
	495	else
	496	#endif
	497	{
	498	SDL_NAME(XvPutImage)(GFX_Display, hwdata->port, SDL_Window, SDL_GC,
	499	hwdata->image,
	500	src->x, src->y, src->w, src->h,
	501	dst->x, dst->y, dst->w, dst->h);
	502	}
	503	XSync(GFX_Display, False);
	504	return(0);
	505	}
	506
	507	void X11_FreeYUVOverlay(_THIS, SDL_Overlay *overlay)
	508	{
	509	struct private_yuvhwdata *hwdata;
	510
	511	hwdata = overlay->hwdata;
	512	if ( hwdata ) {
	513	SDL_NAME(XvUngrabPort)(GFX_Display, hwdata->port, CurrentTime);
	514	#ifndef NO_SHARED_MEMORY
	515	if ( hwdata->yuv_use_mitshm ) {
	516	XShmDetach(GFX_Display, &hwdata->yuvshm);
	517	shmdt(hwdata->yuvshm.shmaddr);
	518	}
	519	#endif
	520	if ( hwdata->image ) {
	521	XFree(hwdata->image);
	522	}
	523	SDL_free(hwdata);
	524	}
	525	if ( overlay->pitches ) {
	526	SDL_free(overlay->pitches);
	527	overlay->pitches = NULL;
	528	}
	529	if ( overlay->pixels ) {
	530	SDL_free(overlay->pixels);
	531	overlay->pixels = NULL;
	532	}
	533	#ifdef XFREE86_REFRESH_HACK
	534	X11_EnableAutoRefresh(this);
	535	#endif
	536	}
	537
	538	#endif /* SDL_VIDEO_DRIVER_X11_XV */