summaryrefslogtreecommitdiff
path: root/src/XvMC.c
blob: 3ee4212cf4057f46e148a0818a9c738c54d1aac3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include "XvMClibint.h"
#ifdef HAVE_SHMAT
#ifndef Lynx
#include <sys/ipc.h>
#include <sys/shm.h>
#else
#include <ipc.h>
#include <shm.h>
#endif /* Lynx */
#endif /* HAVE_SHMAT */
#include <unistd.h>
#include <sys/time.h>
#include <X11/extensions/Xext.h>
#include <X11/extensions/extutil.h>
#include <limits.h>

static XExtensionInfo _xvmc_info_data;
static XExtensionInfo *xvmc_info = &_xvmc_info_data;
static const char *xvmc_extension_name = XvMCName;

static const char *xvmc_error_list[] =
{
   "BadContext",
   "BadSurface",
   "BadSubpicture"
};

static XEXT_GENERATE_CLOSE_DISPLAY (xvmc_close_display, xvmc_info)


static XEXT_GENERATE_ERROR_STRING (xvmc_error_string, xvmc_extension_name,
                                   XvMCNumErrors, xvmc_error_list)


static XExtensionHooks xvmc_extension_hooks = {
    NULL,                               /* create_gc */
    NULL,                               /* copy_gc */
    NULL,                               /* flush_gc */
    NULL,                               /* free_gc */
    NULL,                               /* create_font */
    NULL,                               /* free_font */
    xvmc_close_display,                 /* close_display */
    NULL,                               /* wire_to_event */
    NULL,                               /* event_to_wire */
    NULL,                               /* error */
    xvmc_error_string                   /* error_string */
};

static XEXT_GENERATE_FIND_DISPLAY (xvmc_find_display, xvmc_info,
                                   xvmc_extension_name,
                                   &xvmc_extension_hooks,
                                   XvMCNumEvents, NULL)

Bool XvMCQueryExtension (Display *dpy, int *event_basep, int *error_basep)
{
    XExtDisplayInfo *info = xvmc_find_display(dpy);

    if (XextHasExtension(info)) {
        *event_basep = info->codes->first_event;
        *error_basep = info->codes->first_error;
        return True;
    } else {
        return False;
    }
}

Status XvMCQueryVersion (Display *dpy, int *major, int *minor)
{
    XExtDisplayInfo *info = xvmc_find_display(dpy);
    xvmcQueryVersionReply rep;
    xvmcQueryVersionReq  *req;

    XvMCCheckExtension (dpy, info, BadImplementation);

    LockDisplay (dpy);
    XvMCGetReq (QueryVersion, req);
    if (!_XReply (dpy, (xReply *) &rep, 0, xTrue)) {
        UnlockDisplay (dpy);
        SyncHandle ();
        return BadImplementation;
    }
    *major = rep.major;
    *minor = rep.minor;
    UnlockDisplay (dpy);
    SyncHandle ();
    return Success;
}


XvMCSurfaceInfo * XvMCListSurfaceTypes(Display *dpy, XvPortID port, int *num)
{
    XExtDisplayInfo *info = xvmc_find_display(dpy);
    xvmcListSurfaceTypesReply rep;
    xvmcListSurfaceTypesReq  *req;
    XvMCSurfaceInfo *surface_info = NULL;

    *num = 0;

    XvMCCheckExtension (dpy, info, NULL);

    LockDisplay (dpy);
    XvMCGetReq (ListSurfaceTypes, req);
    req->port = port;
    if (!_XReply (dpy, (xReply *) &rep, 0, xFalse)) {
        UnlockDisplay (dpy);
        SyncHandle ();
        return NULL;
    }

    if(rep.num > 0) {
        if (rep.num < (INT_MAX / sizeof(XvMCSurfaceInfo)))
            surface_info = Xmalloc(rep.num * sizeof(XvMCSurfaceInfo));

        if(surface_info) {
	    xvmcSurfaceInfo sinfo;
	    int i;

	    *num = rep.num;

	    for(i = 0; i < rep.num; i++) {
		_XRead(dpy, (char*)&sinfo, sizeof(xvmcSurfaceInfo));
	       surface_info[i].surface_type_id = sinfo.surface_type_id;
	       surface_info[i].chroma_format = sinfo.chroma_format;
	       surface_info[i].max_width = sinfo.max_width;
	       surface_info[i].max_height = sinfo.max_height;
	       surface_info[i].subpicture_max_width =
					sinfo.subpicture_max_width;
	       surface_info[i].subpicture_max_height =
					sinfo.subpicture_max_height;
	       surface_info[i].mc_type = sinfo.mc_type;
	       surface_info[i].flags = sinfo.flags;
	    }
	} else
	   _XEatDataWords(dpy, rep.length);
    }

    UnlockDisplay (dpy);
    SyncHandle ();
    return surface_info;
}


XvImageFormatValues * XvMCListSubpictureTypes (
  Display * dpy,
  XvPortID port,
  int surface_type_id,
  int *count_return
)
{
    XExtDisplayInfo *info = xvmc_find_display(dpy);
    xvmcListSubpictureTypesReply rep;
    xvmcListSubpictureTypesReq  *req;
    XvImageFormatValues *ret = NULL;


    *count_return = 0;

    XvMCCheckExtension (dpy, info, NULL);


    LockDisplay (dpy);
    XvMCGetReq (ListSubpictureTypes, req);
    req->port = port;
    req->surface_type_id = surface_type_id;
    if (!_XReply (dpy, (xReply *) &rep, 0, xFalse)) {
        UnlockDisplay (dpy);
        SyncHandle ();
        return NULL;
    }

    if(rep.num > 0) {
        if (rep.num < (INT_MAX / sizeof(XvImageFormatValues)))
            ret = Xmalloc(rep.num * sizeof(XvImageFormatValues));

        if(ret) {
            xvImageFormatInfo Info;
            int i;

            *count_return = rep.num;

            for(i = 0; i < rep.num; i++) {
              _XRead(dpy, (char*)(&Info), sz_xvImageFormatInfo);
              ret[i].id = Info.id;
              ret[i].type = Info.type;
              ret[i].byte_order = Info.byte_order;
              memcpy(&(ret[i].guid[0]), &(Info.guid[0]), 16);
              ret[i].bits_per_pixel = Info.bpp;
              ret[i].format = Info.format;
              ret[i].num_planes = Info.num_planes;
              ret[i].depth = Info.depth;
              ret[i].red_mask = Info.red_mask;
              ret[i].green_mask = Info.green_mask;
              ret[i].blue_mask = Info.blue_mask;
              ret[i].y_sample_bits = Info.y_sample_bits;
              ret[i].u_sample_bits = Info.u_sample_bits;
              ret[i].v_sample_bits = Info.v_sample_bits;
              ret[i].horz_y_period = Info.horz_y_period;
              ret[i].horz_u_period = Info.horz_u_period;
              ret[i].horz_v_period = Info.horz_v_period;
              ret[i].vert_y_period = Info.vert_y_period;
              ret[i].vert_u_period = Info.vert_u_period;
              ret[i].vert_v_period = Info.vert_v_period;
              memcpy(&(ret[i].component_order[0]), &(Info.comp_order[0]), 32);
              ret[i].scanline_order = Info.scanline_order;
            }
        } else
	   _XEatDataWords(dpy, rep.length);
    }

    UnlockDisplay (dpy);
    SyncHandle ();
    return ret;
}


/******************************************************************
   These are intended as a protocol interface to be used by direct
   rendering libraries.  They are not intended to be client viewable
   functions.  These will stay in place until we have a mechanism in
   place similar to that of OpenGL with an libXvMCcore library.
*******************************************************************/

/*
   _xvmc_create_context -

   Pass in the context with the surface_type_id, width, height,
   port and flags filled out.  This function will fill out the
   context_id and update the width, height and flags field.
   The server may return implementation-specific information
   back in the priv_data.  The size of that information will
   an array of priv_count CARD32s.  This data is allocated by
   this function.  If returned, the caller is responsible for
   freeing it!  Generally, such information is only returned if
   an XVMC_DIRECT context was specified.
*/


Status _xvmc_create_context (
    Display *dpy,
    XvMCContext *context,
    int *priv_count,
    CARD32 **priv_data
)
{
    XExtDisplayInfo *info = xvmc_find_display(dpy);
    xvmcCreateContextReply rep;
    xvmcCreateContextReq  *req;

    *priv_count = 0;
    *priv_data = NULL;

    XvMCCheckExtension (dpy, info, BadImplementation);

    LockDisplay (dpy);
    XvMCGetReq (CreateContext, req);
    context->context_id = XAllocID(dpy);
    req->context_id = context->context_id;
    req->port = context->port;
    req->surface_type_id = context->surface_type_id;
    req->width = context->width;
    req->height = context->height;
    req->flags = context->flags;
    if (!_XReply (dpy, (xReply *) &rep, 0, xFalse)) {
        UnlockDisplay (dpy);
        SyncHandle ();
        return BadImplementation;
    }
    context->width = rep.width_actual;
    context->height = rep.height_actual;
    context->flags = rep.flags_return;

    if(rep.length) {
	if (rep.length < (INT_MAX >> 2))
	    *priv_data = Xmalloc(rep.length << 2);
	if(*priv_data) {
            _XRead(dpy, (char*)(*priv_data), rep.length << 2);
	    *priv_count = rep.length;
	} else
	    _XEatDataWords(dpy, rep.length);
    }

    UnlockDisplay (dpy);
    SyncHandle ();
    return Success;
}

Status _xvmc_destroy_context (
    Display *dpy,
    XvMCContext *context
)
{
    XExtDisplayInfo *info = xvmc_find_display(dpy);
    xvmcDestroyContextReq  *req;

    XvMCCheckExtension (dpy, info, BadImplementation);

    LockDisplay (dpy);
    XvMCGetReq (DestroyContext, req);
    req->context_id = context->context_id;
    UnlockDisplay (dpy);
    SyncHandle ();
    return Success;
}


/*
   _xvmc_create_surface -

   Pass the context and this function will fill out all the
   information in the surface.
   The server may return implementation-specific information
   back in the priv_data.  The size of that information will
   an array of priv_count CARD32s.  This data is allocated by
   this function.  If returned, the caller is responsible for
   freeing it!  Generally, such information is returned only if
   the context was a direct context.

*/

Status _xvmc_create_surface (
    Display *dpy,
    XvMCContext *context,
    XvMCSurface *surface,
    int *priv_count,
    CARD32 **priv_data
)
{
    XExtDisplayInfo *info = xvmc_find_display(dpy);
    xvmcCreateSurfaceReply rep;
    xvmcCreateSurfaceReq  *req;

    *priv_count = 0;
    *priv_data = NULL;

    XvMCCheckExtension (dpy, info, BadImplementation);

    LockDisplay (dpy);
    XvMCGetReq (CreateSurface, req);

    surface->surface_id = XAllocID(dpy);
    surface->context_id = context->context_id;
    surface->surface_type_id = context->surface_type_id;
    surface->width = context->width;
    surface->height = context->height;

    req->surface_id = surface->surface_id;
    req->context_id = surface->context_id;
    if (!_XReply (dpy, (xReply *) &rep, 0, xFalse)) {
        UnlockDisplay (dpy);
        SyncHandle ();
        return BadImplementation;
    }

    if(rep.length) {
        if (rep.length < (INT_MAX >> 2))
            *priv_data = Xmalloc(rep.length << 2);
        if(*priv_data) {
            _XRead(dpy, (char*)(*priv_data), rep.length << 2);
            *priv_count = rep.length;
        } else
            _XEatDataWords(dpy, rep.length);
    }

    UnlockDisplay (dpy);
    SyncHandle ();
    return Success;
}

Status _xvmc_destroy_surface (
    Display *dpy,
    XvMCSurface *surface
)
{
    XExtDisplayInfo *info = xvmc_find_display(dpy);
    xvmcDestroySurfaceReq  *req;

    XvMCCheckExtension (dpy, info, BadImplementation);

    LockDisplay (dpy);
    XvMCGetReq (DestroySurface, req);
    req->surface_id = surface->surface_id;
    UnlockDisplay (dpy);
    SyncHandle ();
    return Success;
}

/*
   _xvmc_create_subpicture -

   Pass the subpicture with the width, height and xvimage_id filled
   out and this function will fill out everything else in the
   subpicture as well as adjust the width and height if needed.
   The server may return implementation-specific information
   back in the priv_data.  The size of that information will
   an array of priv_count CARD32s.  This data is allocated by
   this function.  If returned, the caller is responsible for
   freeing it!  Generally, such information is returned only if
   the context was a direct context.

*/

Status _xvmc_create_subpicture (
    Display *dpy,
    XvMCContext *context,
    XvMCSubpicture *subpicture,
    int *priv_count,
    CARD32 **priv_data
)
{
    XExtDisplayInfo *info = xvmc_find_display(dpy);
    xvmcCreateSubpictureReply rep;
    xvmcCreateSubpictureReq  *req;

    *priv_count = 0;
    *priv_data = NULL;

    XvMCCheckExtension (dpy, info, BadImplementation);

    LockDisplay (dpy);
    XvMCGetReq (CreateSubpicture, req);

    subpicture->subpicture_id = XAllocID(dpy);
    subpicture->context_id = context->context_id;

    req->subpicture_id = subpicture->subpicture_id;
    req->context_id = subpicture->context_id;
    req->xvimage_id = subpicture->xvimage_id;
    req->width = subpicture->width;
    req->height = subpicture->height;
    if (!_XReply (dpy, (xReply *) &rep, 0, xFalse)) {
        UnlockDisplay (dpy);
        SyncHandle ();
        return BadImplementation;
    }

    subpicture->width = rep.width_actual;
    subpicture->height = rep.height_actual;
    subpicture->num_palette_entries = rep.num_palette_entries;
    subpicture->entry_bytes = rep.entry_bytes;
    subpicture->component_order[0] = rep.component_order[0];
    subpicture->component_order[1] = rep.component_order[1];
    subpicture->component_order[2] = rep.component_order[2];
    subpicture->component_order[3] = rep.component_order[3];

    if(rep.length) {
        if (rep.length < (INT_MAX >> 2))
            *priv_data = Xmalloc(rep.length << 2);
        if(*priv_data) {
            _XRead(dpy, (char*)(*priv_data), rep.length << 2);
            *priv_count = rep.length;
        } else
            _XEatDataWords(dpy, rep.length);
    }

    UnlockDisplay (dpy);
    SyncHandle ();
    return Success;
}

Status _xvmc_destroy_subpicture(
    Display *dpy,
    XvMCSubpicture *subpicture
)
{
    XExtDisplayInfo *info = xvmc_find_display(dpy);
    xvmcDestroySubpictureReq  *req;

    XvMCCheckExtension (dpy, info, BadImplementation);

    LockDisplay (dpy);
    XvMCGetReq (DestroySubpicture, req);
    req->subpicture_id = subpicture->subpicture_id;
    UnlockDisplay (dpy);
    SyncHandle ();
    return Success;
}

Status XvMCGetDRInfo(Display *dpy, XvPortID port,
		     char **name, char **busID,
		     int *major, int *minor,
		     int *patchLevel,
		     int *isLocal)
{
    XExtDisplayInfo *info = xvmc_find_display(dpy);
    xvmcGetDRInfoReply rep;
    xvmcGetDRInfoReq  *req;
    CARD32 magic;

#ifdef HAVE_SHMAT
    volatile CARD32 *shMem;
    struct timezone here;
    struct timeval now;
    here.tz_minuteswest = 0;
    here.tz_dsttime = 0;
#endif

    *name = NULL;
    *busID = NULL;

    XvMCCheckExtension (dpy, info, BadImplementation);

    LockDisplay (dpy);
    XvMCGetReq (GetDRInfo, req);

    req->port = port;
    magic = 0;
    req->magic = 0;
#ifdef HAVE_SHMAT
    req->shmKey = shmget(IPC_PRIVATE, 1024, IPC_CREAT | 0600);

    /*
     * We fill a shared memory page with a repetitive pattern. If the
     * X server can read this pattern, we probably have a local connection.
     * Note that we can trigger the remote X server to read any shared
     * page on the remote machine, so we shouldn't be able to guess and verify
     * any complicated data on those pages. Thats the explanation of this
     * otherwise stupid-looking pattern algorithm.
     */

    if (req->shmKey >= 0) {
	shMem = (CARD32 *) shmat(req->shmKey, NULL, 0);
	shmctl( req->shmKey, IPC_RMID, NULL);
	if ( shMem ) {

	    register volatile CARD32 *shMemC = shMem;
	    register int i;

	    gettimeofday( &now, &here);
	    magic = now.tv_usec & 0x000FFFFF;
	    req->magic = magic;
	    i = 1024 / sizeof(CARD32);
	    while(i--) {
	        *shMemC++ = magic;
	        magic = ~magic;
	    }
	} else {
	    req->shmKey = -1;
	}
    }
#else
    req->shmKey = 0;
#endif
    if (!_XReply (dpy, (xReply *) &rep, 0, xFalse)) {
        UnlockDisplay (dpy);
        SyncHandle ();
#ifdef HAVE_SHMAT
	if ( req->shmKey >= 0) {
	    shmdt( (const void *) shMem );
	}
#endif
        return -1;
    }
#ifdef HAVE_SHMAT
    shmdt( (const void *) shMem );
#endif

    if (rep.length > 0) {
	unsigned long realSize = 0;
	char *tmpBuf = NULL;

	if ((rep.length < (INT_MAX >> 2)) &&
	    /* protect against overflow in strncpy below */
	    (rep.nameLen + rep.busIDLen > rep.nameLen)) {
	    realSize = rep.length << 2;
	    if (realSize >= (rep.nameLen + rep.busIDLen)) {
		tmpBuf = Xmalloc(realSize);
		*name = Xmalloc(rep.nameLen);
		*busID = Xmalloc(rep.busIDLen);
	    }
	}

	if (*name && *busID && tmpBuf) {
	    _XRead(dpy, tmpBuf, realSize);
	    strncpy(*name,tmpBuf,rep.nameLen);
	    (*name)[rep.nameLen == 0 ? 0 : rep.nameLen - 1] = '\0';
	    strncpy(*busID,tmpBuf+rep.nameLen,rep.busIDLen);
	    (*busID)[rep.busIDLen == 0 ? 0 : rep.busIDLen - 1] = '\0';
	    XFree(tmpBuf);
	} else {
	    XFree(*name);
	    *name = NULL;
	    XFree(*busID);
	    *busID = NULL;
	    XFree(tmpBuf);

	    _XEatDataWords(dpy, rep.length);
	    UnlockDisplay (dpy);
	    SyncHandle ();
	    return -1;

	}
    }

    UnlockDisplay (dpy);
    SyncHandle ();
    *major = rep.major;
    *minor = rep.minor;
    *patchLevel = rep.patchLevel;
    *isLocal = (req->shmKey > 0) ? rep.isLocal : 1;
    return (rep.length > 0) ? Success : BadImplementation;
}