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SDL_x11yuv.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Sam Lantinga
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slouken@libsdl.org
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*/
#ifdef SAVE_RCSID
static char rcsid =
"@(#) $Id$";
#endif
/* This is the XFree86 Xv extension implementation of YUV video overlays */
#ifdef XFREE86_XV
#include <stdlib.h>
#include <string.h>
#include <X11/Xlib.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <X11/extensions/XShm.h>
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#include <XFree86/extensions/Xvlib.h>
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#include "SDL_error.h"
#include "SDL_video.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
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/* Fix for the NVidia GeForce 2 - use the last available adaptor */
#define USE_LAST_ADAPTOR
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/* 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;
XShmSegmentInfo yuvshm;
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SDL_NAME(XvImage) *image;
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};
SDL_Overlay *X11_CreateYUVOverlay(_THIS, int width, int height, Uint32 format, SDL_Surface *display)
{
SDL_Overlay *overlay;
struct private_yuvhwdata *hwdata;
int xv_port;
int i, j, k;
int adaptors;
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SDL_NAME(XvAdaptorInfo) *ainfo;
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XShmSegmentInfo *yuvshm;
/* Look for the XVideo extension with a valid port for this format */
xv_port = -1;
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if ( (Success == SDL_NAME(XvQueryExtension)(GFX_Display, &j, &j, &j, &j, &j)) &&
(Success == SDL_NAME(XvQueryAdaptors)(GFX_Display,
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RootWindow(GFX_Display, SDL_Screen),
&adaptors, &ainfo)) ) {
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#ifdef USE_LAST_ADAPTOR
for ( i=0; i < adaptors; ++i ) {
#else
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for ( i=0; (i < adaptors) && (xv_port == -1); ++i ) {
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#endif /* USE_LAST_ADAPTOR */
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/* 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;
}
}
if ( (ainfo[i].type & XvInputMask) &&
(ainfo[i].type & XvImageMask) ) {
int num_formats;
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SDL_NAME(XvImageFormatValues) *formats;
formats = SDL_NAME(XvListImageFormats)(GFX_Display,
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ainfo[i].base_id, &num_formats);
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#ifdef USE_LAST_ADAPTOR
for ( j=0; j < num_formats; ++j ) {
#else
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for ( j=0; (j < num_formats) && (xv_port == -1); ++j ) {
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#endif /* USE_LAST_ADAPTOR */
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if ( (Uint32)formats[j].id == format ) {
for ( k=0; k < ainfo[i].num_ports; ++k ) {
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if ( Success == SDL_NAME(XvGrabPort)(GFX_Display, ainfo[i].base_id+k, CurrentTime) ) {
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xv_port = ainfo[i].base_id+k;
break;
}
}
}
}
}
}
}
if ( xv_port == -1 ) {
SDL_SetError("No available video ports for requested format");
return(NULL);
}
/* Create the overlay structure */
overlay = (SDL_Overlay *)malloc(sizeof *overlay);
if ( overlay == NULL ) {
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SDL_NAME(XvUngrabPort)(GFX_Display, xv_port, CurrentTime);
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SDL_OutOfMemory();
return(NULL);
}
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 *)malloc(sizeof *hwdata);
overlay->hwdata = hwdata;
if ( hwdata == NULL ) {
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SDL_NAME(XvUngrabPort)(GFX_Display, xv_port, CurrentTime);
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SDL_OutOfMemory();
SDL_FreeYUVOverlay(overlay);
return(NULL);
}
yuvshm = &hwdata->yuvshm;
memset(yuvshm, 0, sizeof(*yuvshm));
hwdata->port = xv_port;
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hwdata->image = SDL_NAME(XvShmCreateImage)(GFX_Display, xv_port, format,
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0, width, height, yuvshm);
#ifdef PITCH_WORKAROUND
if ( hwdata->image != NULL && hwdata->image->pitches[0] != width )
{
/* Ajust overlay width according to pitch */
switch (format) {
case SDL_YV12_OVERLAY:
case SDL_IYUV_OVERLAY:
width = hwdata->image->pitches[0];
break;
case SDL_YUY2_OVERLAY:
case SDL_UYVY_OVERLAY:
case SDL_YVYU_OVERLAY:
width = hwdata->image->pitches[0] / 2;
break;
default:
/* We should never get here (caught above) */
return(NULL);
}
XFree(hwdata->image);
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hwdata->image = SDL_NAME(XvShmCreateImage)(GFX_Display, xv_port, format,
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0, width, height, yuvshm);
}
#endif
if ( hwdata->image == NULL ) {
SDL_OutOfMemory();
SDL_FreeYUVOverlay(overlay);
return(NULL);
}
yuvshm->shmid = shmget(IPC_PRIVATE, hwdata->image->data_size,
IPC_CREAT | 0777);
if ( yuvshm->shmid < 0 ) {
SDL_SetError("Unable to get %d bytes shared memory",
hwdata->image->data_size);
SDL_FreeYUVOverlay(overlay);
return(NULL);
}
yuvshm->shmaddr = (char *) shmat(yuvshm->shmid, 0, 0);
yuvshm->readOnly = False;
hwdata->image->data = yuvshm->shmaddr;
XShmAttach(GFX_Display, yuvshm);
XSync(GFX_Display, False);
shmctl(yuvshm->shmid, IPC_RMID, 0);
/* Find the pitch and offset values for the overlay */
overlay->planes = hwdata->image->num_planes;
overlay->pitches = (Uint16 *)malloc(overlay->planes * sizeof(Uint16));
overlay->pixels = (Uint8 **)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
/* 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 *dstrect)
{
struct private_yuvhwdata *hwdata;
hwdata = overlay->hwdata;
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SDL_NAME(XvShmPutImage)(GFX_Display, hwdata->port, SDL_Window, SDL_GC,
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hwdata->image, 0, 0, overlay->w, overlay->h,
dstrect->x, dstrect->y, dstrect->w, dstrect->h, False);
XSync(GFX_Display, False);
return(0);
}
void X11_FreeYUVOverlay(_THIS, SDL_Overlay *overlay)
{
struct private_yuvhwdata *hwdata;
hwdata = overlay->hwdata;
if ( hwdata ) {
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SDL_NAME(XvUngrabPort)(GFX_Display, hwdata->port, CurrentTime);
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if ( hwdata->yuvshm.shmaddr ) {
XShmDetach(GFX_Display, &hwdata->yuvshm);
shmdt(hwdata->yuvshm.shmaddr);
}
if ( hwdata->image ) {
XFree(hwdata->image);
}
free(hwdata);
}
if ( overlay->pitches ) {
free(overlay->pitches);
overlay->pitches = NULL;
}
if ( overlay->pixels ) {
free(overlay->pixels);
overlay->pixels = NULL;
}
#ifdef XFREE86_REFRESH_HACK
X11_EnableAutoRefresh(this);
#endif
}
#endif /* XFREE86_XV */