1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2006 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 /* Fix for the NVidia GeForce 2 - use the last available adaptor */
48 /*#define USE_LAST_ADAPTOR*/ /* Apparently the NVidia drivers are fixed */
49
50 /* The functions used to manipulate software video overlays */
51 static struct private_yuvhwfuncs x11_yuvfuncs = {
52 X11_LockYUVOverlay,
53 X11_UnlockYUVOverlay,
54 X11_DisplayYUVOverlay,
55 X11_FreeYUVOverlay
56 };
57
58 struct private_yuvhwdata {
59 int port;
60 #ifndef NO_SHARED_MEMORY
61 int yuv_use_mitshm;
62 XShmSegmentInfo yuvshm;
63 #endif
64 SDL_NAME(XvImage) *image;
65 };
66
67
68 static int (*X_handler)(Display *, XErrorEvent *) = NULL;
69
70 #ifndef NO_SHARED_MEMORY
71 /* Shared memory error handler routine */
72 static int shm_error;
shm_errhandler(Display * d,XErrorEvent * e)73 static int shm_errhandler(Display *d, XErrorEvent *e)
74 {
75 if ( e->error_code == BadAccess ) {
76 shm_error = True;
77 return(0);
78 } else
79 return(X_handler(d,e));
80 }
81 #endif /* !NO_SHARED_MEMORY */
82
83 static int xv_error;
xv_errhandler(Display * d,XErrorEvent * e)84 static int xv_errhandler(Display *d, XErrorEvent *e)
85 {
86 if ( e->error_code == BadMatch ) {
87 xv_error = True;
88 return(0);
89 } else
90 return(X_handler(d,e));
91 }
92
X11_CreateYUVOverlay(_THIS,int width,int height,Uint32 format,SDL_Surface * display)93 SDL_Overlay *X11_CreateYUVOverlay(_THIS, int width, int height, Uint32 format, SDL_Surface *display)
94 {
95 SDL_Overlay *overlay;
96 struct private_yuvhwdata *hwdata;
97 int xv_port;
98 unsigned int i, j, k;
99 unsigned int adaptors;
100 SDL_NAME(XvAdaptorInfo) *ainfo;
101 int bpp;
102 #ifndef NO_SHARED_MEMORY
103 XShmSegmentInfo *yuvshm;
104 #endif
105
106 /* Look for the XVideo extension with a valid port for this format */
107 xv_port = -1;
108 if ( (Success == SDL_NAME(XvQueryExtension)(GFX_Display, &j, &j, &j, &j, &j)) &&
109 (Success == SDL_NAME(XvQueryAdaptors)(GFX_Display,
110 RootWindow(GFX_Display, SDL_Screen),
111 &adaptors, &ainfo)) ) {
112 #ifdef USE_LAST_ADAPTOR
113 for ( i=0; i < adaptors; ++i )
114 #else
115 for ( i=0; (i < adaptors) && (xv_port == -1); ++i )
116 #endif /* USE_LAST_ADAPTOR */
117 {
118 /* Check to see if the visual can be used */
119 if ( BUGGY_XFREE86(<=, 4001) ) {
120 int visual_ok = 0;
121 for ( j=0; j<ainfo[i].num_formats; ++j ) {
122 if ( ainfo[i].formats[j].visual_id ==
123 SDL_Visual->visualid ) {
124 visual_ok = 1;
125 break;
126 }
127 }
128 if ( ! visual_ok ) {
129 continue;
130 }
131 }
132 if ( (ainfo[i].type & XvInputMask) &&
133 (ainfo[i].type & XvImageMask) ) {
134 int num_formats;
135 SDL_NAME(XvImageFormatValues) *formats;
136 formats = SDL_NAME(XvListImageFormats)(GFX_Display,
137 ainfo[i].base_id, &num_formats);
138 #ifdef USE_LAST_ADAPTOR
139 for ( j=0; j < num_formats; ++j )
140 #else
141 for ( j=0; (j < num_formats) && (xv_port == -1); ++j )
142 #endif /* USE_LAST_ADAPTOR */
143 {
144 if ( (Uint32)formats[j].id == format ) {
145 for ( k=0; k < ainfo[i].num_ports; ++k ) {
146 if ( Success == SDL_NAME(XvGrabPort)(GFX_Display, ainfo[i].base_id+k, CurrentTime) ) {
147 xv_port = ainfo[i].base_id+k;
148 break;
149 }
150 }
151 }
152 }
153 if ( formats ) {
154 XFree(formats);
155 }
156 }
157 }
158 SDL_NAME(XvFreeAdaptorInfo)(ainfo);
159 }
160
161 /* Precalculate the bpp for the pitch workaround below */
162 switch (format) {
163 /* Add any other cases we need to support... */
164 case SDL_YUY2_OVERLAY:
165 case SDL_UYVY_OVERLAY:
166 case SDL_YVYU_OVERLAY:
167 bpp = 2;
168 break;
169 default:
170 bpp = 1;
171 break;
172 }
173
174 #if 0
175 /*
176 * !!! FIXME:
177 * "Here are some diffs for X11 and yuv. Note that the last part 2nd
178 * diff should probably be a new call to XvQueryAdaptorFree with ainfo
179 * and the number of adaptors, instead of the loop through like I did."
180 *
181 * ACHTUNG: This is broken! It looks like XvFreeAdaptorInfo does this
182 * for you, so we end up with a double-free. I need to look at this
183 * more closely... --ryan.
184 */
185 for ( i=0; i < adaptors; ++i ) {
186 if (ainfo[i].name != NULL) Xfree(ainfo[i].name);
187 if (ainfo[i].formats != NULL) Xfree(ainfo[i].formats);
188 }
189 Xfree(ainfo);
190 #endif
191
192 if ( xv_port == -1 ) {
193 SDL_SetError("No available video ports for requested format");
194 return(NULL);
195 }
196
197 /* Enable auto-painting of the overlay colorkey */
198 {
199 static const char *attr[] = { "XV_AUTOPAINT_COLORKEY", "XV_AUTOPAINT_COLOURKEY" };
200 unsigned int i;
201
202 SDL_NAME(XvSelectPortNotify)(GFX_Display, xv_port, True);
203 X_handler = XSetErrorHandler(xv_errhandler);
204 for ( i=0; i < sizeof(attr)/(sizeof attr[0]); ++i ) {
205 Atom a;
206
207 xv_error = False;
208 a = XInternAtom(GFX_Display, attr[i], True);
209 if ( a != None ) {
210 SDL_NAME(XvSetPortAttribute)(GFX_Display, xv_port, a, 1);
211 XSync(GFX_Display, True);
212 if ( ! xv_error ) {
213 break;
214 }
215 }
216 }
217 XSetErrorHandler(X_handler);
218 SDL_NAME(XvSelectPortNotify)(GFX_Display, xv_port, False);
219 }
220
221 /* Create the overlay structure */
222 overlay = (SDL_Overlay *)SDL_malloc(sizeof *overlay);
223 if ( overlay == NULL ) {
224 SDL_NAME(XvUngrabPort)(GFX_Display, xv_port, CurrentTime);
225 SDL_OutOfMemory();
226 return(NULL);
227 }
228 SDL_memset(overlay, 0, (sizeof *overlay));
229
230 /* Fill in the basic members */
231 overlay->format = format;
232 overlay->w = width;
233 overlay->h = height;
234
235 /* Set up the YUV surface function structure */
236 overlay->hwfuncs = &x11_yuvfuncs;
237 overlay->hw_overlay = 1;
238
239 /* Create the pixel data and lookup tables */
240 hwdata = (struct private_yuvhwdata *)SDL_malloc(sizeof *hwdata);
241 overlay->hwdata = hwdata;
242 if ( hwdata == NULL ) {
243 SDL_NAME(XvUngrabPort)(GFX_Display, xv_port, CurrentTime);
244 SDL_OutOfMemory();
245 SDL_FreeYUVOverlay(overlay);
246 return(NULL);
247 }
248 hwdata->port = xv_port;
249 #ifndef NO_SHARED_MEMORY
250 yuvshm = &hwdata->yuvshm;
251 SDL_memset(yuvshm, 0, sizeof(*yuvshm));
252 hwdata->image = SDL_NAME(XvShmCreateImage)(GFX_Display, xv_port, format,
253 0, width, height, yuvshm);
254 #ifdef PITCH_WORKAROUND
255 if ( hwdata->image != NULL && hwdata->image->pitches[0] != (width*bpp) ) {
256 /* Ajust overlay width according to pitch */
257 XFree(hwdata->image);
258 width = hwdata->image->pitches[0] / bpp;
259 hwdata->image = SDL_NAME(XvShmCreateImage)(GFX_Display, xv_port, format,
260 0, width, height, yuvshm);
261 }
262 #endif /* PITCH_WORKAROUND */
263 hwdata->yuv_use_mitshm = (hwdata->image != NULL);
264 if ( hwdata->yuv_use_mitshm ) {
265 yuvshm->shmid = shmget(IPC_PRIVATE, hwdata->image->data_size,
266 IPC_CREAT | 0777);
267 if ( yuvshm->shmid >= 0 ) {
268 yuvshm->shmaddr = (char *)shmat(yuvshm->shmid, 0, 0);
269 yuvshm->readOnly = False;
270 if ( yuvshm->shmaddr != (char *)-1 ) {
271 shm_error = False;
272 X_handler = XSetErrorHandler(shm_errhandler);
273 XShmAttach(GFX_Display, yuvshm);
274 XSync(GFX_Display, True);
275 XSetErrorHandler(X_handler);
276 if ( shm_error )
277 shmdt(yuvshm->shmaddr);
278 } else {
279 shm_error = True;
280 }
281 shmctl(yuvshm->shmid, IPC_RMID, NULL);
282 } else {
283 shm_error = True;
284 }
285 if ( shm_error ) {
286 XFree(hwdata->image);
287 hwdata->yuv_use_mitshm = 0;
288 } else {
289 hwdata->image->data = yuvshm->shmaddr;
290 }
291 }
292 if ( !hwdata->yuv_use_mitshm )
293 #endif /* NO_SHARED_MEMORY */
294 {
295 hwdata->image = SDL_NAME(XvCreateImage)(GFX_Display, xv_port, format,
296 0, width, height);
297
298 #ifdef PITCH_WORKAROUND
299 if ( hwdata->image != NULL && hwdata->image->pitches[0] != (width*bpp) ) {
300 /* Ajust overlay width according to pitch */
301 XFree(hwdata->image);
302 width = hwdata->image->pitches[0] / bpp;
303 hwdata->image = SDL_NAME(XvCreateImage)(GFX_Display, xv_port, format,
304 0, width, height);
305 }
306 #endif /* PITCH_WORKAROUND */
307 if ( hwdata->image == NULL ) {
308 SDL_SetError("Couldn't create XVideo image");
309 SDL_FreeYUVOverlay(overlay);
310 return(NULL);
311 }
312 hwdata->image->data = SDL_malloc(hwdata->image->data_size);
313 if ( hwdata->image->data == NULL ) {
314 SDL_OutOfMemory();
315 SDL_FreeYUVOverlay(overlay);
316 return(NULL);
317 }
318 }
319
320 /* Find the pitch and offset values for the overlay */
321 overlay->planes = hwdata->image->num_planes;
322 overlay->pitches = (Uint16 *)SDL_malloc(overlay->planes * sizeof(Uint16));
323 overlay->pixels = (Uint8 **)SDL_malloc(overlay->planes * sizeof(Uint8 *));
324 if ( !overlay->pitches || !overlay->pixels ) {
325 SDL_OutOfMemory();
326 SDL_FreeYUVOverlay(overlay);
327 return(NULL);
328 }
329 for ( i=0; i<overlay->planes; ++i ) {
330 overlay->pitches[i] = hwdata->image->pitches[i];
331 overlay->pixels[i] = (Uint8 *)hwdata->image->data +
332 hwdata->image->offsets[i];
333 }
334
335 #ifdef XFREE86_REFRESH_HACK
336 /* Work around an XFree86 X server bug (?)
337 We can't perform normal updates in windows that have video
338 being output to them. See SDL_x11image.c for more details.
339 */
340 X11_DisableAutoRefresh(this);
341 #endif
342
343 /* We're all done.. */
344 return(overlay);
345 }
346
X11_LockYUVOverlay(_THIS,SDL_Overlay * overlay)347 int X11_LockYUVOverlay(_THIS, SDL_Overlay *overlay)
348 {
349 return(0);
350 }
351
X11_UnlockYUVOverlay(_THIS,SDL_Overlay * overlay)352 void X11_UnlockYUVOverlay(_THIS, SDL_Overlay *overlay)
353 {
354 return;
355 }
356
X11_DisplayYUVOverlay(_THIS,SDL_Overlay * overlay,SDL_Rect * src,SDL_Rect * dst)357 int X11_DisplayYUVOverlay(_THIS, SDL_Overlay *overlay, SDL_Rect *src, SDL_Rect *dst)
358 {
359 struct private_yuvhwdata *hwdata;
360
361 hwdata = overlay->hwdata;
362
363 #ifndef NO_SHARED_MEMORY
364 if ( hwdata->yuv_use_mitshm ) {
365 SDL_NAME(XvShmPutImage)(GFX_Display, hwdata->port, SDL_Window, SDL_GC,
366 hwdata->image,
367 src->x, src->y, src->w, src->h,
368 dst->x, dst->y, dst->w, dst->h, False);
369 }
370 else
371 #endif
372 {
373 SDL_NAME(XvPutImage)(GFX_Display, hwdata->port, SDL_Window, SDL_GC,
374 hwdata->image,
375 src->x, src->y, src->w, src->h,
376 dst->x, dst->y, dst->w, dst->h);
377 }
378 XSync(GFX_Display, False);
379 return(0);
380 }
381
X11_FreeYUVOverlay(_THIS,SDL_Overlay * overlay)382 void X11_FreeYUVOverlay(_THIS, SDL_Overlay *overlay)
383 {
384 struct private_yuvhwdata *hwdata;
385
386 hwdata = overlay->hwdata;
387 if ( hwdata ) {
388 SDL_NAME(XvUngrabPort)(GFX_Display, hwdata->port, CurrentTime);
389 #ifndef NO_SHARED_MEMORY
390 if ( hwdata->yuv_use_mitshm ) {
391 XShmDetach(GFX_Display, &hwdata->yuvshm);
392 shmdt(hwdata->yuvshm.shmaddr);
393 }
394 #endif
395 if ( hwdata->image ) {
396 XFree(hwdata->image);
397 }
398 SDL_free(hwdata);
399 }
400 if ( overlay->pitches ) {
401 SDL_free(overlay->pitches);
402 overlay->pitches = NULL;
403 }
404 if ( overlay->pixels ) {
405 SDL_free(overlay->pixels);
406 overlay->pixels = NULL;
407 }
408 #ifdef XFREE86_REFRESH_HACK
409 X11_EnableAutoRefresh(this);
410 #endif
411 }
412
413 #endif /* SDL_VIDEO_DRIVER_X11_XV */
414