summaryrefslogtreecommitdiff
path: root/src/tdfx_video.c
blob: 04b3cac2e65ae0256e020dbd925a8183acf52e58 (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
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/tdfx/tdfx_video.c,v 1.20tsi Exp $ */

#include "xf86.h"
#include "tdfx.h"
#include "dixstruct.h"

#include "Xv.h"
#include "fourcc.h"

static Atom xvColorKey, xvFilterQuality;

/* These should move into tdfxdefs.h with better names */
#define YUV_Y_BASE              0xC00000
#define YUV_U_BASE              0xD00000
#define YUV_V_BASE              0xE00000

#define SST_2D_FORMAT_YUYV      0x8
#define SST_2D_FORMAT_UYVY      0x9

#define YUVBASEADDR             0x80100
#define YUVSTRIDE               0x80104
#define VIDPROCCFGMASK          0xa2e3eb6c

#define OFF_DELAY               250  /* milliseconds */
#define FREE_DELAY              15000

#define OFF_TIMER               0x01
#define FREE_TIMER              0x02
#define CLIENT_VIDEO_ON         0x04
#define TIMER_MASK              (OFF_TIMER | FREE_TIMER)

#define TDFX_MAX_OVERLAY_PORTS  1
#define TDFX_MAX_TEXTURE_PORTS  32

#define GET_PORT_PRIVATE(pScrn) \
   (TDFXPortPrivPtr)((TDFXPTR(pScrn))->overlayAdaptor->pPortPrivates[0].ptr)

/* Needed for attribute atoms */
#define MAKE_ATOM(a) MakeAtom(a, sizeof(a) - 1, TRUE)

/*
 * PROTOTYPES
 */

static FBAreaPtr TDFXAllocateMemoryArea (ScrnInfoPtr pScrn, FBAreaPtr area, int width, int height);
static FBLinearPtr TDFXAllocateMemoryLinear (ScrnInfoPtr pScrn, FBLinearPtr linear, int size);
static void TDFXVideoTimerCallback(ScrnInfoPtr pScrn, Time time);

static XF86VideoAdaptorPtr TDFXSetupImageVideoTexture(ScreenPtr);
static int  TDFXSetPortAttributeTexture(ScrnInfoPtr, Atom, INT32, pointer);
static int  TDFXGetPortAttributeTexture(ScrnInfoPtr, Atom ,INT32 *, pointer);
static int  TDFXPutImageTexture(ScrnInfoPtr, short, short, short, short, short, short, short, short, int, unsigned char*, short, short, Bool, RegionPtr, pointer);
static void TDFXStopVideoTexture(ScrnInfoPtr, pointer, Bool);

static XF86VideoAdaptorPtr TDFXSetupImageVideoOverlay(ScreenPtr);
static int  TDFXSetPortAttributeOverlay(ScrnInfoPtr, Atom, INT32, pointer);
static int  TDFXGetPortAttributeOverlay(ScrnInfoPtr, Atom ,INT32 *, pointer);
static int  TDFXPutImageOverlay(ScrnInfoPtr, short, short, short, short, short, short, short, short, int, unsigned char*, short, short, Bool, RegionPtr, pointer);
static void TDFXStopVideoOverlay(ScrnInfoPtr, pointer, Bool);
static void TDFXResetVideoOverlay(ScrnInfoPtr);

static void TDFXQueryBestSize(ScrnInfoPtr, Bool, short, short, short, short, unsigned int *, unsigned int *, pointer);
static int  TDFXQueryImageAttributes(ScrnInfoPtr, int, unsigned short *, unsigned short *,  int *, int *);

static void TDFXInitOffscreenImages(ScreenPtr);

/*
 * ADAPTOR INFORMATION
 */

static XF86VideoEncodingRec OverlayEncoding[] =
{
   { 0, "XV_IMAGE", 2048, 2048, {1, 1} }
};

static XF86VideoEncodingRec TextureEncoding[] =
{
   { 0, "XV_IMAGE", 1024, 1024, {1, 1} }
};

static XF86VideoFormatRec OverlayFormats[] = 
{
   {8, TrueColor}, {8, DirectColor}, {8, PseudoColor},
   {8, GrayScale}, {8, StaticGray}, {8, StaticColor},
   {15, TrueColor}, {16, TrueColor}, {24, TrueColor},
   {15, DirectColor}, {16, DirectColor}, {24, DirectColor}
};

static XF86VideoFormatRec TextureFormats[] = 
{
   {15, TrueColor}, {16, TrueColor}, {24, TrueColor}
};

static XF86AttributeRec OverlayAttributes[] =
{
   {XvSettable | XvGettable, 0, (1 << 24) - 1, "XV_COLORKEY"},
   {XvSettable | XvGettable, 0, 1, "XV_FILTER_QUALITY"}
};

static XF86AttributeRec TextureAttributes[] =
{
   {XvSettable | XvGettable, 0, (1 << 24) - 1, "XV_COLORKEY"},
   {XvSettable | XvGettable, 0, 1, "XV_FILTER_QUALITY"}
};

static XF86ImageRec OverlayImages[] =
{
  XVIMAGE_YUY2, XVIMAGE_UYVY, XVIMAGE_YV12, XVIMAGE_I420
};

static XF86ImageRec TextureImages[] =
{
  XVIMAGE_YV12, XVIMAGE_I420
};

/*
 * COMMON SETUP FUNCTIONS
 */

void TDFXInitVideo(ScreenPtr pScreen)
{
    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
    XF86VideoAdaptorPtr *adaptors, *newAdaptors = NULL;
    XF86VideoAdaptorPtr newAdaptor = NULL;
    TDFXPtr pTDFX = TDFXPTR(pScrn);
    int num_adaptors;

    /* The hardware can't convert YUV->8 bit color */
    if(pTDFX->cpp == 1)
      return;
    
    if (!pTDFX->TextureXvideo) {
	/* Offscreen support for Overlay only */
    	TDFXInitOffscreenImages(pScreen);

    	/* Overlay adaptor */
        newAdaptor = TDFXSetupImageVideoOverlay(pScreen);
    } else {
    	/* Texture adaptor */
        newAdaptor = TDFXSetupImageVideoTexture(pScreen);
    }

    num_adaptors = xf86XVListGenericAdaptors(pScrn, &adaptors);

    if(newAdaptor) {
	if (!num_adaptors) {
	    num_adaptors = 1;
	    adaptors = &newAdaptor;
	} else {
            newAdaptors = 
		xalloc((num_adaptors + 1) * sizeof(XF86VideoAdaptorPtr*));
            if(newAdaptors) {
                memcpy(newAdaptors, adaptors, num_adaptors * 
						sizeof(XF86VideoAdaptorPtr));
                newAdaptors[num_adaptors] = newAdaptor;
                adaptors = newAdaptors;
                num_adaptors++;
            }
	}
    }

    if(num_adaptors)
        xf86XVScreenInit(pScreen, adaptors, num_adaptors);

    if(newAdaptors)
        xfree(newAdaptors);
}


void TDFXCloseVideo (ScreenPtr pScreen)
{
}


static XF86VideoAdaptorPtr
TDFXAllocAdaptor(ScrnInfoPtr pScrn, int numberPorts)
{
    XF86VideoAdaptorPtr adapt;
    TDFXPtr pTDFX = TDFXPTR(pScrn);
    TDFXPortPrivPtr pPriv;

    if(!(adapt = xf86XVAllocateVideoAdaptorRec(pScrn)))
        return NULL;

    if(!(pPriv = xcalloc(1, sizeof(TDFXPortPrivRec) + (numberPorts * sizeof(DevUnion)))))
    {
        xfree(adapt);
        return NULL;
    }

    adapt->pPortPrivates = (DevUnion*)(&pPriv[1]);
    adapt->pPortPrivates[0].ptr = (pointer)pPriv;

    xvColorKey = MAKE_ATOM("XV_COLORKEY");
    xvFilterQuality = MAKE_ATOM("XV_FILTER_QUALITY");

    pPriv->colorKey = pTDFX->videoKey;
    pPriv->videoStatus = 0;
    pPriv->filterQuality = 1;
  
    return adapt;
}


static XF86VideoAdaptorPtr
TDFXSetupImageVideoOverlay(ScreenPtr pScreen)
{
    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
    TDFXPtr pTDFX = TDFXPTR(pScrn);
    TDFXPortPrivPtr pPriv;
    XF86VideoAdaptorPtr adapt;

    if(!(adapt = TDFXAllocAdaptor(pScrn, TDFX_MAX_OVERLAY_PORTS)))
        return NULL;

    adapt->type = XvWindowMask | XvInputMask | XvImageMask;
    adapt->flags = VIDEO_OVERLAID_IMAGES | VIDEO_CLIP_TO_VIEWPORT;
    adapt->name = "3dfx Video Overlay";
    adapt->nPorts = TDFX_MAX_OVERLAY_PORTS;
    adapt->nEncodings = sizeof(OverlayEncoding) / sizeof(XF86VideoEncodingRec);
    adapt->pEncodings = OverlayEncoding;
    adapt->nFormats = sizeof(OverlayFormats) / sizeof(XF86VideoFormatRec);
    adapt->pFormats = OverlayFormats;
    adapt->nAttributes = sizeof(OverlayAttributes) / sizeof(XF86AttributeRec);
    adapt->pAttributes = OverlayAttributes;
    adapt->nImages = sizeof(OverlayImages) / sizeof(XF86ImageRec);
    adapt->pImages = OverlayImages;
    adapt->PutVideo = NULL;
    adapt->PutStill = NULL;
    adapt->GetVideo = NULL;
    adapt->GetStill = NULL;
    adapt->StopVideo = TDFXStopVideoOverlay;
    adapt->SetPortAttribute = TDFXSetPortAttributeOverlay;
    adapt->GetPortAttribute = TDFXGetPortAttributeOverlay;
    adapt->QueryBestSize = TDFXQueryBestSize;
    adapt->PutImage = TDFXPutImageOverlay;
    adapt->QueryImageAttributes = TDFXQueryImageAttributes;

    pTDFX->overlayAdaptor = adapt;

    pPriv = (TDFXPortPrivPtr)(adapt->pPortPrivates[0].ptr);
    REGION_NULL(pScreen, &(pPriv->clip));

    TDFXResetVideoOverlay(pScrn);

    return adapt;
}

static XF86VideoAdaptorPtr
TDFXSetupImageVideoTexture(ScreenPtr pScreen)
{
    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
    TDFXPtr pTDFX = TDFXPTR(pScrn);
    XF86VideoAdaptorPtr adapt;
    int i;

    if(!(adapt = TDFXAllocAdaptor(pScrn, TDFX_MAX_TEXTURE_PORTS)))
        return NULL;

    adapt->type = XvWindowMask | XvInputMask | XvImageMask;
    adapt->flags = VIDEO_OVERLAID_IMAGES;
    adapt->name = "3dfx Video Texture";
    adapt->nPorts = TDFX_MAX_TEXTURE_PORTS;
    adapt->nEncodings = sizeof(TextureEncoding) / sizeof(XF86VideoEncodingRec);
    adapt->pEncodings = TextureEncoding;
    adapt->nFormats = sizeof(TextureFormats) / sizeof(XF86VideoFormatRec);
    adapt->pFormats = TextureFormats;
    adapt->nAttributes = sizeof(TextureAttributes) / sizeof(XF86AttributeRec);
    adapt->pAttributes = TextureAttributes;
    adapt->nImages = sizeof(TextureImages) / sizeof(XF86ImageRec);
    adapt->pImages = TextureImages;
    adapt->PutVideo = NULL;
    adapt->PutStill = NULL;
    adapt->GetVideo = NULL;
    adapt->GetStill = NULL;
    adapt->StopVideo = TDFXStopVideoTexture;
    adapt->SetPortAttribute = TDFXSetPortAttributeTexture;
    adapt->GetPortAttribute = TDFXGetPortAttributeTexture;
    adapt->QueryBestSize = TDFXQueryBestSize;
    adapt->PutImage = TDFXPutImageTexture;
    adapt->QueryImageAttributes = TDFXQueryImageAttributes;

    for(i = 0; i < TDFX_MAX_TEXTURE_PORTS; i++)
        adapt->pPortPrivates[i].val = i;

    pTDFX->textureAdaptor = adapt;

    return adapt;
}


/*
 * MISCELLANEOUS ROUTINES
 */

static int
TDFXQueryImageAttributes(
    ScrnInfoPtr pScrn,
    int id,
    unsigned short *w, unsigned short *h,
    int *pitches, int *offsets
){
    int size, tmp;

    if(*w > 1024) *w = 1024;
    if(*h > 1024) *h = 1024;

    *w = (*w + 1) & ~1;
    if(offsets) offsets[0] = 0;

    switch(id) {
    case FOURCC_YV12:
    case FOURCC_I420:
        *h = (*h + 1) & ~1;
        size = (*w + 3) & ~3;
        if(pitches) pitches[0] = size;
        size *= *h;
        if(offsets) offsets[1] = size;
        tmp = ((*w >> 1) + 3) & ~3;
        if(pitches) pitches[1] = pitches[2] = tmp;
        tmp *= (*h >> 1);
        size += tmp;
        if(offsets) offsets[2] = size;
        size += tmp;
        break;
    case FOURCC_UYVY:
    case FOURCC_YUY2:
    default:
        size = *w << 1;
        if(pitches) pitches[0] = size;
        size *= *h;
        break;
    }

    return size;
}


static int
TDFXSetPortAttributeOverlay(
  ScrnInfoPtr pScrn,
  Atom attribute,
  INT32 value,
  pointer data
){

  TDFXPortPrivPtr pPriv = (TDFXPortPrivPtr)data;
  TDFXPtr pTDFX = TDFXPTR(pScrn);

  if(attribute == xvColorKey) {
        pPriv->colorKey = value;
        pTDFX->writeLong(pTDFX, VIDCHROMAMIN, pPriv->colorKey);
        pTDFX->writeLong(pTDFX, VIDCHROMAMAX, pPriv->colorKey);
        REGION_EMPTY(pScrn->pScreen, &pPriv->clip);
  } else if(attribute == xvFilterQuality) {
        if((value < 0) || (value > 1))
           return BadValue;
        pPriv->filterQuality = value;
  } else return BadMatch;

  return Success;
}

static int
TDFXGetPortAttributeOverlay(
  ScrnInfoPtr pScrn,
  Atom attribute,
  INT32 *value,
  pointer data
){
  TDFXPortPrivPtr pPriv = (TDFXPortPrivPtr)data;

  if(attribute == xvColorKey) {
        *value = pPriv->colorKey;
  } else if(attribute == xvFilterQuality) {
        *value = pPriv->filterQuality;
  } else return BadMatch;

  return Success;
}


static int 
TDFXSetPortAttributeTexture(
  ScrnInfoPtr pScrn, 
  Atom attribute,
  INT32 value, 
  pointer data
) {
  return Success;
}


static int 
TDFXGetPortAttributeTexture(
  ScrnInfoPtr pScrn, 
  Atom attribute,
  INT32 *value, 
  pointer data
){
  return Success;
}


static void
TDFXQueryBestSize(
  ScrnInfoPtr pScrn,
  Bool motion,
  short vid_w, short vid_h,
  short drw_w, short drw_h,
  unsigned int *p_w, unsigned int *p_h,
  pointer data
){
   if(vid_w > drw_w) drw_w = vid_w;
   if(vid_h > drw_h) drw_h = vid_h;
   
  *p_w = drw_w;
  *p_h = drw_h;
}


static void
TDFXCopyData(
  unsigned char *src,
  unsigned char *dst,
  int srcPitch,
  int dstPitch,
  int h,
  int w
){
#if X_BYTE_ORDER == X_BIG_ENDIAN
    w >>= 1;
    while(h--) {
      int i;
      for (i=0; i<w; i++)
       ((unsigned long *)dst)[i]=BE_WSWAP32(((unsigned long *)src)[i]);
       src += srcPitch;
       dst += dstPitch;
    }
#else
     w <<= 1;
     while(h--) {
 	memcpy(dst, src, w);
 	src += srcPitch;
 	dst += dstPitch;
     }
#endif
}

static void
TDFXCopyMungedData(
   unsigned char *src1,
   unsigned char *src2,
   unsigned char *src3,
   unsigned char *dst1,
   int srcPitch,
   int srcPitch2,
   int dstPitch,
   int h,
   int w
){
   CARD32 *dst;
   CARD8 *s1, *s2, *s3;
   int i, j;

   w >>= 1;

   for(j = 0; j < h; j++) {
        dst = (CARD32*)dst1;
        s1 = src1;  s2 = src2;  s3 = src3;
        i = w;
        while(i > 4) {
           dst[0] = BE_WSWAP32(s1[0] | (s1[1] << 16) | (s3[0] << 8) |
			(s2[0] << 24));
           dst[1] = BE_WSWAP32(s1[2] | (s1[3] << 16) | (s3[1] << 8) |
			(s2[1] << 24));
           dst[2] = BE_WSWAP32(s1[4] | (s1[5] << 16) | (s3[2] << 8) |
			(s2[2] << 24));
           dst[3] = BE_WSWAP32(s1[6] | (s1[7] << 16) | (s3[3] << 8) |
			(s2[3] << 24));
 	   dst += 4; s2 += 4; s3 += 4; s1 += 8;
 	   i -= 4;
 	}
 	while(i--) {
	   dst[0] = BE_WSWAP32(s1[0] | (s1[1] << 16) | (s3[0] << 8) |
				(s2[0] << 24));
 	   dst++; s2++; s3++;
 	   s1 += 2;
 	}

        dst1 += dstPitch;
        src1 += srcPitch;
        if(j & 1) {
            src2 += srcPitch2;
            src3 += srcPitch2;
        }
   }
}


/*
 * TEXTURE DRAWING FUNCTIONS
 */


static void
TDFXStopVideoTexture(ScrnInfoPtr pScrn, pointer data, Bool cleanup)
{
  TDFXPtr pTDFX = TDFXPTR(pScrn);

  if (cleanup) {
     if(pTDFX->textureBuffer) {
        xf86FreeOffscreenArea(pTDFX->textureBuffer);
        pTDFX->textureBuffer = NULL;
     }
  }
}


static void
TDFXScreenToScreenYUVStretchBlit (ScrnInfoPtr pScrn,
                                  short src_x1, short src_y1,
                                  short src_x2, short src_y2,
                                  short dst_x1, short dst_y1,
                                  short dst_x2, short dst_y2)
{
   TDFXPtr pTDFX = TDFXPTR(pScrn);
   /* reformulate the paramaters the way the hardware wants them */
   INT32 src_x = src_x1 & 0x1FFF;
   INT32 src_y = src_y1 & 0x1FFF;
   INT32 dst_x = dst_x1 & 0x1FFF;
   INT32 dst_y = dst_y1 & 0x1FFF;
   INT32 src_w = (src_x2 - src_x1) & 0x1FFF;
   INT32 src_h = (src_y2 - src_y1) & 0x1FFF;
   INT32 dst_w = (dst_x2 - dst_x1) & 0x1FFF;
   INT32 dst_h = (dst_y2 - dst_y1) & 0x1FFF;

   /* Setup for blit src and dest */
   TDFXMakeRoom(pTDFX, 4);
   DECLARE(SSTCP_DSTSIZE|SSTCP_SRCSIZE|SSTCP_DSTXY|SSTCP_COMMAND/*|SSTCP_COMMANDEXTRA*/);
   /* TDFXWriteLong(pTDFX, SST_2D_COMMANDEXTRA, SST_COMMANDEXTRA_VSYNC);*/
   TDFXWriteLong(pTDFX, SST_2D_SRCSIZE, src_w | (src_h<<16));
   TDFXWriteLong(pTDFX, SST_2D_DSTSIZE, dst_w | (dst_h<<16));
   TDFXWriteLong(pTDFX, SST_2D_DSTXY,   dst_x | (dst_y<<16));
   TDFXWriteLong(pTDFX, SST_2D_COMMAND, SST_2D_SCRNTOSCRNSTRETCH | 0xCC000000);
   /* Write to the launch area to start the blit */
   TDFXMakeRoom(pTDFX, 1);
   DECLARE_LAUNCH(1, 0);
   TDFXWriteLong(pTDFX, SST_2D_LAUNCH, (src_x<<1) | (src_y<<16));
   /* Wait for it to happen */
   TDFXSendNOPFifo2D(pScrn);
}


static void
YUVPlanarToPacked (ScrnInfoPtr pScrn,
                   short src_x, short src_y,
                   short src_h, short src_w,
                   int id, unsigned char *buf,
                   short width, short height,
                   FBAreaPtr fbarea)
{
   TDFXPtr pTDFX = TDFXPTR(pScrn);
   unsigned char *psrc, *pdst;
   int count;
   int baseaddr;
   INT32 yuvBaseAddr, yuvStride;

   /* Save these registers so I can restore them when we are done. */
   yuvBaseAddr = TDFXReadLongMMIO(pTDFX, YUVBASEADDR);
   yuvStride =   TDFXReadLongMMIO(pTDFX, YUVSTRIDE);

   /* Set yuvBaseAddress and yuvStride. */
   baseaddr = pTDFX->fbOffset + pTDFX->cpp * fbarea->box.x1 + pTDFX->stride * fbarea->box.y1;
   TDFXWriteLongMMIO(pTDFX, YUVSTRIDE, pTDFX->stride);
   TDFXWriteLongMMIO(pTDFX, YUVBASEADDR, baseaddr);

   /* Copy Y plane (twice as much Y as U or V) */
   psrc = buf;
   psrc += (src_x & ~0x1) + src_y * width;
   pdst = pTDFX->MMIOBase[0] + YUV_Y_BASE;
   TDFXCopyData(psrc, pdst, width, 1024, src_h, src_w + (src_x & 0x1));

   /* Copy V plane */
   psrc = buf + width * height;
   psrc += (src_x >> 1) + (src_y >> 1) * (width >> 1);
   pdst = pTDFX->MMIOBase[0] + YUV_V_BASE;
   TDFXCopyData(psrc, pdst, width >> 1, 1024, src_h >> 1, src_w >> 1);

   /* Copy U plane */
   psrc = buf + width * height + (width >> 1) * (height >> 1);
   psrc += (src_x >> 1) + (src_y >> 1) * (width >> 1);
   pdst = pTDFX->MMIOBase[0] + YUV_U_BASE;
   TDFXCopyData(psrc, pdst, width >> 1, 1024, src_h >> 1, src_w >> 1);

   /* IDLE until the copy finished, timeout for safety */
   for (count = 0; count < 1000; count++) 
     if (!((TDFXReadLongMMIO(pTDFX, STATUS) & SST_BUSY)))
       break;

   /* Restore trashed registers */
   TDFXWriteLongMMIO(pTDFX, YUVBASEADDR, yuvBaseAddr);
   TDFXWriteLongMMIO(pTDFX, YUVSTRIDE, yuvStride);  

   /* Wait for it to happen */
   TDFXSendNOPFifo2D(pScrn);
}


static int 
TDFXPutImageTexture( 
             ScrnInfoPtr pScrn, 
             short src_x, short src_y, 
             short drw_x, short drw_y,
             short src_w, short src_h, 
             short drw_w, short drw_h,
             int id, unsigned char* buf, 
             short width, short height, 
             Bool sync,
             RegionPtr clipBoxes, pointer data
             )
{
   TDFXPtr pTDFX = TDFXPTR(pScrn);
   BoxPtr pbox;
   int nbox;
   int format;

   TDFXTRACE("TDFXPutImageTexture(src_x=%d, src_y=%d, drw_x=%d, drw_y=%d, .. sync=%d\n",
		   src_x, src_y, drw_x, drw_y, sync);

   /* Check the source format */
   if (id == FOURCC_YV12)      format = SST_2D_FORMAT_YUYV;
   else if (id == FOURCC_UYVY) format = SST_2D_FORMAT_UYVY;
   else                        return BadAlloc;

   /* Get a buffer to store the packed YUV data */
   if (!(pTDFX->textureBuffer = TDFXAllocateMemoryArea(pScrn, pTDFX->textureBuffer, src_w, src_h)))
        return BadAlloc;

   /* Pack the YUV data in offscreen memory using YUV framebuffer (0x[CDE]0000) */
   YUVPlanarToPacked (pScrn, src_x, src_y, src_h, src_w,
                      id, buf, width, height,
                      pTDFX->textureBuffer);

   /* Setup source and destination pixel formats (yuv -> rgb) */
   TDFXMakeRoom(pTDFX, 2);
   DECLARE(SSTCP_SRCFORMAT|SSTCP_DSTFORMAT);
   TDFXWriteLong(pTDFX, SST_2D_DSTFORMAT, pTDFX->stride|((pTDFX->cpp+1)<<16));
   TDFXWriteLong(pTDFX, SST_2D_SRCFORMAT, pTDFX->stride|((format)<<16));

   /* Blit packed YUV data from offscreen memory, respecting clips */
#define SRC_X1 (pTDFX->textureBuffer->box.x1)
#define SRC_Y1 (pTDFX->textureBuffer->box.y1)
#define SCALEX(dx) ((int)(((dx) * src_w) / drw_w))
#define SCALEY(dy) ((int)(((dy) * src_h) / drw_h))
   for (nbox = REGION_NUM_RECTS(clipBoxes),
        pbox = REGION_RECTS(clipBoxes); nbox > 0; nbox--, pbox++)
   {
     TDFXScreenToScreenYUVStretchBlit (pScrn,
        SRC_X1 + SCALEX(pbox->x1 - drw_x), 
        SRC_Y1 + SCALEY(pbox->y1 - drw_y),
        SRC_X1 + SCALEX(pbox->x2 - drw_x), 
        SRC_Y1 + SCALEY(pbox->y2 - drw_y),
        pbox->x1, pbox->y1,
        pbox->x2, pbox->y2);
   }

   /* Restore the WAX registers we trashed */
   TDFXMakeRoom(pTDFX, 2);
   DECLARE(SSTCP_SRCFORMAT|SSTCP_DSTFORMAT);
   TDFXWriteLong(pTDFX, SST_2D_DSTFORMAT, pTDFX->sst2DDstFmtShadow);
   TDFXWriteLong(pTDFX, SST_2D_SRCFORMAT, pTDFX->sst2DSrcFmtShadow);

   /* Wait for it to happen */
   TDFXSendNOPFifo2D(pScrn);

   return Success;
}


/*
 * OVERLAY DRAWING FUNCTIONS
 */


static void
TDFXResetVideoOverlay(ScrnInfoPtr pScrn)
{
    TDFXPtr pTDFX = TDFXPTR(pScrn);
    TDFXPortPrivPtr pPriv = pTDFX->overlayAdaptor->pPortPrivates[0].ptr;

    /* reset the video */
    pTDFX->ModeReg.vidcfg &= ~VIDPROCCFGMASK;
    pTDFX->writeLong(pTDFX, VIDPROCCFG, pTDFX->ModeReg.vidcfg);
    pTDFX->writeLong(pTDFX, RGBMAXDELTA, 0x0080808);
    pTDFX->writeLong(pTDFX, VIDCHROMAMIN, pPriv->colorKey);
    pTDFX->writeLong(pTDFX, VIDCHROMAMAX, pPriv->colorKey);
}


static void
TDFXStopVideoOverlay(ScrnInfoPtr pScrn, pointer data, Bool cleanup)
{
  TDFXPtr pTDFX = TDFXPTR(pScrn);
  TDFXPortPrivPtr pPriv = (TDFXPortPrivPtr)data;

  REGION_EMPTY(pScrn->pScreen, &pPriv->clip);

  if(cleanup) {
     if(pPriv->videoStatus & CLIENT_VIDEO_ON) {
        pTDFX->ModeReg.vidcfg &= ~VIDPROCCFGMASK;
        pTDFX->writeLong(pTDFX, VIDPROCCFG, pTDFX->ModeReg.vidcfg);
     }
     if(pTDFX->overlayBuffer) {
        xf86FreeOffscreenLinear(pTDFX->overlayBuffer);
        pTDFX->overlayBuffer = NULL;
     }
     if(pTDFX->overlayBuffer2) {
        xf86FreeOffscreenLinear(pTDFX->overlayBuffer2);
        pTDFX->overlayBuffer2 = NULL;
     }
     pPriv->videoStatus = 0;
  } else {
     if(pPriv->videoStatus & CLIENT_VIDEO_ON) {
        pPriv->videoStatus |= OFF_TIMER;
        pPriv->offTime = currentTime.milliseconds + OFF_DELAY;
     }
  }
}


/* * * * * *

Decoder...

VIDPROCCFG:  0x5c:  Video Processor Configuration register

#define VIDPROCCFGMASK          0xa2e3eb6c
  3 2         1         0
  10987654321098765432109876543210
  10100010111000111110101101101100

The "1" bits are the bits cleared to 0 in pTDFX->ModeReg.vidcfg


Then we or in 0x320:

      11
      109876543210
320 = 001100100000
    
bit 11=0: Do not bypass clut (colour lookup) for overlay
bit 10=0: Do not bypass clut for desktop
bit  9=1: use video-in buffer address as overlay start
          address (auto-flipping)
bit  8=1: fetch overlay surface
bit  7=0: do not fetch the desktop surface (?)
bit  6=0: chromakey not inverted
bit  5=1: chromakey enabled
bit  4=0: half-mode disabled
bit  3=0: not interlaced (interlace doesn't work on Avenger)
bit  2=0: overlay stereo disabled
bit  1=0: Windows cursor mode
bit  0=0: Video processor off, VGA mode on

SST_VIDEO_2X_MODE_EN: bit26: means 2 pixels per screen clock mode is on

VIDOVERLAYSTARTCOORDS: x&y coords of overlay on the screen
VIDOVERLAYENDSCREENCOORDS: x&y coorder of bot-right of overlay on the screen
VIDOVERLAYDUDX: step size in source per hoz step in screen space (x-mag)
VIDOVERLAYDUDXOFFSETSRCWIDTH:
VIDOVERLAYDVDY: step size in sourcxe per vertical step in screen (y-mag)
VIDOVERLAYDVDYOFFSET: initial offset of DVDY
VIDDESKTOPOVERLAYSTRIDE: desktop surface stride

SST_3D_LEFTOVERLAYBUF: starting physical address of the overlay surface buffer
VIDINADDR0: starting address of video-in buffer-0
 [this is set, but this is for video _input_ as I understand docs...?]

* * * * * */

static void
TDFXDisplayVideoOverlay(
    ScrnInfoPtr pScrn,
    int id,
    int offset,
    short width, short height,
    int pitch,
    int left, int right, int top,
    BoxPtr dstBox,
    short src_w, short src_h,
    short drw_w, short drw_h
){
    TDFXPtr pTDFX = TDFXPTR(pScrn);
    TDFXPortPrivPtr pPriv = pTDFX->overlayAdaptor->pPortPrivates[0].ptr;
    int dudx, dvdy;

    dudx = (src_w << 20) / drw_w;
    /* subtract 1 to eliminate garbage on last line */
    dvdy = (( src_h - 1 )<< 20) / drw_h; 

    offset += ((left >> 16) & ~1) << 1;
    left = (left & 0x0001ffff) << 3;

    pTDFX->ModeReg.vidcfg &= ~VIDPROCCFGMASK;
    pTDFX->ModeReg.vidcfg |= 0x00000320;

    if(drw_w != src_w)       pTDFX->ModeReg.vidcfg |= (1 << 14);
    if(drw_h != src_h)       pTDFX->ModeReg.vidcfg |= (1 << 15);
    if(id == FOURCC_UYVY)    pTDFX->ModeReg.vidcfg |= (6 << 21);
    else                     pTDFX->ModeReg.vidcfg |= (5 << 21);
    if(pScrn->depth == 8)    pTDFX->ModeReg.vidcfg |= (1 << 11);
    /* can't do bilinear filtering when in 2X mode */
    if(pPriv->filterQuality && !(pTDFX->ModeReg.vidcfg & SST_VIDEO_2X_MODE_EN))
	pTDFX->ModeReg.vidcfg |= (3 << 16);
    pTDFX->writeLong(pTDFX, VIDPROCCFG, pTDFX->ModeReg.vidcfg);

    pTDFX->writeLong(pTDFX, VIDOVERLAYSTARTCOORDS, dstBox->x1 | (dstBox->y1 << 12));
    pTDFX->writeLong(pTDFX, VIDOVERLAYENDSCREENCOORDS, (dstBox->x2 - 1) | ((dstBox->y2 - 1) << 12));
    pTDFX->writeLong(pTDFX, VIDOVERLAYDUDX, dudx);
    pTDFX->writeLong(pTDFX, VIDOVERLAYDUDXOFFSETSRCWIDTH, left | (src_w << 20));
    pTDFX->writeLong(pTDFX, VIDOVERLAYDVDY, dvdy);
    pTDFX->writeLong(pTDFX, VIDOVERLAYDVDYOFFSET, (top & 0x0000ffff) << 3);

    pTDFX->ModeReg.stride &= 0x0000ffff;
    pTDFX->ModeReg.stride |= pitch << 16;
    pTDFX->writeLong(pTDFX, VIDDESKTOPOVERLAYSTRIDE, pTDFX->ModeReg.stride);
    pTDFX->writeLong(pTDFX, SST_3D_LEFTOVERLAYBUF, offset & ~3);
    pTDFX->writeLong(pTDFX, VIDINADDR0, offset & ~3);
    TDFXTRACE("TDFXDisplayVideoOverlay: done, offset=0x%x\n", offset);
}


#if 0

/* * * * *

TDFXSwapVideoOverlayBuffer tries to use the Avenger SWAPBUFFER
capability to change frames without tearing.

Use this in preference to TDFXDisplayVideoOverlay where all image
parameters are the same as the previous frame - ie where only the
SST_3D_LEFTOVERLAYBUF register would have been changed.

NOTE: Work in progress - doesn't seem to sync to VSYNC, and only every
other frame gets displayed...

Seeing that the buffer swap initiated by DisplayVideoOverlay gets
synced to VSYNC anyway, just adding double-buffering to PutImageOverlay
appears to do the job.  Still - I leave this code in in case we can
get it working later

  -- Steve Davies 2002-10-04
  -- <steve@daviesfam.org>

* * * * * */

static void
TDFXSwapVideoOverlayBuffer(
    ScrnInfoPtr pScrn,
    int offset,
    int left
){
    TDFXPtr pTDFX = TDFXPTR(pScrn);
    offset += ((left >> 16) & ~1) << 1;
    /* Write mew buffer address */
    pTDFX->writeLong(pTDFX, SST_3D_LEFTOVERLAYBUF, offset & ~3);
    /* Incremement the swap-pending counter */
    pTDFX->writeLong(pTDFX, SST_3D_SWAPPENDING, 0);
    /* write the swapbuffer command - triggered by (next) VSYNC */
    pTDFX->writeLong(pTDFX, SST_3D_SWAPBUFFERCMD, 1);
}

#endif

static int
TDFXPutImageOverlay(
  ScrnInfoPtr pScrn,
  short src_x, short src_y,
  short drw_x, short drw_y,
  short src_w, short src_h,
  short drw_w, short drw_h,
  int id, unsigned char* buf,
  short width, short height,
  Bool Sync,
  RegionPtr clipBoxes, pointer data
){
   TDFXPtr pTDFX = TDFXPTR(pScrn);
   TDFXPortPrivPtr pPriv = (TDFXPortPrivPtr)data;
   INT32 xa, xb, ya, yb;
   unsigned char *dst_start;
   int new_size, offset;
   int s2offset = 0, s3offset = 0;
   int srcPitch = 0, srcPitch2 = 0;
   int dstPitch;
   int top, left, npixels, nlines, bpp;
   BoxRec dstBox;
   CARD32 tmp;

   TDFXTRACE("TDFXPutImageOverlay: src_x=%d, src_y=%d, drw_x=%d, drw_y=%d, src_w=%d, src_h=%d, drw_w=%d, drw_h=%d, id=%d, width=%d, height=%d, sync=%d\n",
		   src_x, src_y, drw_x, drw_y, src_w, src_h, drw_w, drw_h, id, width, height, Sync);

   /*
    * s2offset, s3offset - byte offsets into U and V plane of the
    *                      source where copying starts.  Y plane is
    *                      done by editing "buf".
    *
    * offset - byte offset to the first line of the destination.
    *
    * dst_start - byte address to the first displayed pel.
    *
    */

   if(src_w > drw_w) drw_w = src_w;
   if(src_h > drw_h) drw_h = src_h;

   /* Clip */
   xa = src_x;
   xb = src_x + src_w;
   ya = src_y;
   yb = src_y + src_h;

   dstBox.x1 = drw_x;
   dstBox.x2 = drw_x + drw_w;
   dstBox.y1 = drw_y;
   dstBox.y2 = drw_y + drw_h;

   if(!xf86XVClipVideoHelper(&dstBox, &xa, &xb, &ya, &yb,
			     clipBoxes, width, height))
        return Success;

   dstBox.x1 -= pScrn->frameX0;
   dstBox.x2 -= pScrn->frameX0;
   dstBox.y1 -= pScrn->frameY0;
   dstBox.y2 -= pScrn->frameY0;

   bpp = pScrn->bitsPerPixel >> 3;

   switch(id) {
   case FOURCC_YV12:
   case FOURCC_I420:
        dstPitch = ((width << 1) + 3) & ~3;
        new_size = ((dstPitch * height) + bpp - 1) / bpp;
        srcPitch = (width + 3) & ~3;
        s2offset = srcPitch * height;
        srcPitch2 = ((width >> 1) + 3) & ~3;
        s3offset = (srcPitch2 * (height >> 1)) + s2offset;
        break;
   case FOURCC_UYVY:
   case FOURCC_YUY2:
   default:
        dstPitch = ((width << 1) + 3) & ~3;
        new_size = ((dstPitch * height) + bpp - 1) / bpp;
        srcPitch = (width << 1);
        break;
   }

   if(!(pTDFX->overlayBuffer = TDFXAllocateMemoryLinear(pScrn, pTDFX->overlayBuffer, new_size)))
        return BadAlloc;
   /* Second buffer for double-buffering (If we can't get the memory then we just don't double-buffer) */
   if (!(pTDFX->overlayBuffer2 = TDFXAllocateMemoryLinear(pScrn, pTDFX->overlayBuffer2, new_size)))
     pTDFX->whichOverlayBuffer = 0;
   TDFXTRACE("TDFXPutImageOverlay: %s have a second overlay buffer for double-buffering\n",
	     pTDFX->overlayBuffer2 ? "Do" : "Do not");

   /* copy data */
   top = ya >> 16;
   left = (xa >> 16) & ~1;
   npixels = ((((xb + 0xffff) >> 16) + 1) & ~1) - left;

   /* Get buffer offset */
   if (pTDFX->whichOverlayBuffer == 0)
     offset = (pTDFX->overlayBuffer->offset * bpp) + (top * dstPitch) + pTDFX->fbOffset;
   else
     offset = (pTDFX->overlayBuffer2->offset * bpp) + (top * dstPitch) + pTDFX->fbOffset;

   /* Flip to other buffer for next time */
   pTDFX->whichOverlayBuffer ^= 1;

   dst_start = pTDFX->FbBase + offset;

   switch(id) {
    case FOURCC_YV12:
    case FOURCC_I420:
        top &= ~1;
        dst_start += left << 1;
        tmp = ((top >> 1) * srcPitch2) + (left >> 1);
        s2offset += tmp;
        s3offset += tmp;
        if(id == FOURCC_I420) {
           tmp = s2offset;
           s2offset = s3offset;
           s3offset = tmp;
        }
        nlines = ((((yb + 0xffff) >> 16) + 1) & ~1) - top;
	TDFXTRACE("TDFXPutImageOverlay: using copymungeddata\n");
        TDFXCopyMungedData(buf + (top * srcPitch) + left, buf + s2offset,
                           buf + s3offset, dst_start, srcPitch, srcPitch2,
                           dstPitch, nlines, npixels);
        break;
    case FOURCC_UYVY:
    case FOURCC_YUY2:
    default:
        left <<= 1;
        buf += (top * srcPitch) + left;
        nlines = ((yb + 0xffff) >> 16) - top;
        dst_start += left;
	TDFXTRACE("TDFXPutImageOverlay: using copydata\n");
        TDFXCopyData(buf, dst_start, srcPitch, dstPitch, nlines, npixels);
        break;
    }

    if(!REGION_EQUAL(pScrn->pScreen, &pPriv->clip, clipBoxes)) {
        REGION_COPY(pScrn->pScreen, &pPriv->clip, clipBoxes);
	xf86XVFillKeyHelper(pScrn->pScreen, pPriv->colorKey, clipBoxes);
    }

    TDFXDisplayVideoOverlay(pScrn, id, offset, width, height, dstPitch, xa, xb, ya, &dstBox, src_w, src_h, drw_w, drw_h);

    pPriv->videoStatus = CLIENT_VIDEO_ON;

    pTDFX->VideoTimerCallback = TDFXVideoTimerCallback;

    /* Display some swap-buffer related info...: vidCurrOverlayStartAddr, fbiSwapHistory */
    /* To give us some insight into workings or otherwise of swapbuffer stuff */
    TDFXTRACE("TDFXPutImageOverlay: vidCurrOverlayStrtAdr=%x, fbiSwpHist=%x, whchBuf=%d, 3Dstus=%x\n",
	      pTDFX->readLong(pTDFX, VIDCUROVERLAYSTARTADDR),
	      pTDFX->readLong(pTDFX, SST_3D_FBISWAPHISTORY),
	      pTDFX->whichOverlayBuffer,
	      pTDFX->readLong(pTDFX, SST_3D_STATUS)
    );

    return Success;
}


static void
TDFXVideoTimerCallback(ScrnInfoPtr pScrn, Time time)
{
    TDFXPtr pTDFX = TDFXPTR(pScrn);
    TDFXPortPrivPtr pPriv = pTDFX->overlayAdaptor->pPortPrivates[0].ptr;

    if(pPriv->videoStatus & TIMER_MASK) {
        if(pPriv->videoStatus & OFF_TIMER) {
            if(pPriv->offTime < time) {
                pTDFX->ModeReg.vidcfg &= ~VIDPROCCFGMASK;
                pTDFX->writeLong(pTDFX, VIDPROCCFG, pTDFX->ModeReg.vidcfg);
                pPriv->videoStatus = FREE_TIMER;
                pPriv->freeTime = time + FREE_DELAY;
            }
        } else
        if(pPriv->videoStatus & FREE_TIMER) {
            if(pPriv->freeTime < time) {
                if(pTDFX->overlayBuffer) {
                   xf86FreeOffscreenLinear(pTDFX->overlayBuffer);
                   pTDFX->overlayBuffer = NULL;
                }
                if(pTDFX->overlayBuffer2) {
                   xf86FreeOffscreenLinear(pTDFX->overlayBuffer2);
                   pTDFX->overlayBuffer2 = NULL;
                }
                pPriv->videoStatus = 0;
                pTDFX->VideoTimerCallback = NULL;
            }
        }
    } else  /* shouldn't get here */
        pTDFX->VideoTimerCallback = NULL;
}


/*
 * MEMORY MANAGEMENT
 */


static FBAreaPtr
TDFXAllocateMemoryArea (ScrnInfoPtr pScrn, FBAreaPtr area, int width, int height)
{
  TDFXPtr pTDFX = TDFXPTR(pScrn);
  ScreenPtr pScreen;
  FBAreaPtr new_area;

  if (area) {
    if ((area->box.x2 - area->box.x1 >= width) &&
        (area->box.y2 - area->box.y1 >= height))
      return area;

    if (xf86ResizeOffscreenArea(area, width, height))
      return area;

    xf86FreeOffscreenArea(area);
  }

  pScreen = screenInfo.screens[pScrn->scrnIndex];

  new_area = xf86AllocateOffscreenArea(pScreen, width, height, pTDFX->cpp, NULL, NULL, NULL);

  if (!new_area) {
    int max_width, max_height;

    xf86QueryLargestOffscreenArea(pScreen, &max_width, &max_height, pTDFX->cpp, 0, PRIORITY_EXTREME);

    if (max_width < width || max_height < height)
      return NULL;

    xf86PurgeUnlockedOffscreenAreas(pScreen);
    new_area = xf86AllocateOffscreenArea(pScreen, width, height, pTDFX->cpp, NULL, NULL, NULL);
  }

  return new_area;
}


static FBLinearPtr
TDFXAllocateMemoryLinear (ScrnInfoPtr pScrn, FBLinearPtr linear, int size)
{
   ScreenPtr pScreen;
   FBLinearPtr new_linear;

   if(linear) {
        if(linear->size >= size)
           return linear;

        if(xf86ResizeOffscreenLinear(linear, size))
           return linear;

        xf86FreeOffscreenLinear(linear);
   }

   pScreen = screenInfo.screens[pScrn->scrnIndex];

   new_linear = xf86AllocateOffscreenLinear(pScreen, size, 4, NULL, NULL, NULL);

   if(!new_linear) {
        int max_size;

        xf86QueryLargestOffscreenLinear(pScreen, &max_size, 4, PRIORITY_EXTREME);

        if(max_size < size)
           return NULL;

        xf86PurgeUnlockedOffscreenAreas(pScreen);
        new_linear = xf86AllocateOffscreenLinear(pScreen, size, 4, NULL, NULL, NULL);
   }

   return new_linear;
}

/****************** Offscreen stuff ***************/

typedef struct {
  FBLinearPtr linear;
  Bool isOn;
} OffscreenPrivRec, * OffscreenPrivPtr;

static int 
TDFXAllocateSurface(
    ScrnInfoPtr pScrn,
    int id,
    unsigned short w, 	
    unsigned short h,
    XF86SurfacePtr surface
){
    TDFXPtr pTDFX = TDFXPTR(pScrn);
    FBLinearPtr linear;
    int pitch, size, bpp;
    OffscreenPrivPtr pPriv;

    if((w > 2048) || (h > 2048))
	return BadAlloc;

    w = (w + 1) & ~1;
    pitch = ((w << 1) + 15) & ~15;
    bpp = pScrn->bitsPerPixel >> 3;
    size = ((pitch * h) + bpp - 1) / bpp;

    if(!(linear = TDFXAllocateMemoryLinear(pScrn, NULL, size)))
	return BadAlloc;

    surface->width = w;
    surface->height = h;

    if(!(surface->pitches = xalloc(sizeof(int)))) {
	xf86FreeOffscreenLinear(linear);
	return BadAlloc;
    }
    if(!(surface->offsets = xalloc(sizeof(int)))) {
	xfree(surface->pitches);
	xf86FreeOffscreenLinear(linear);
	return BadAlloc;
    }
    if(!(pPriv = xalloc(sizeof(OffscreenPrivRec)))) {
	xfree(surface->pitches);
	xfree(surface->offsets);
	xf86FreeOffscreenLinear(linear);
	return BadAlloc;
    }

    pPriv->linear = linear;
    pPriv->isOn = FALSE;

    surface->pScrn = pScrn;
    surface->id = id;   
    surface->pitches[0] = pitch;
    surface->offsets[0] = pTDFX->fbOffset + (linear->offset * bpp);
    surface->devPrivate.ptr = (pointer)pPriv;

    return Success;
}

static int 
TDFXStopSurface(
    XF86SurfacePtr surface
){
    OffscreenPrivPtr pPriv = (OffscreenPrivPtr)surface->devPrivate.ptr;

    if(pPriv->isOn) {
	TDFXPtr pTDFX = TDFXPTR(surface->pScrn);
        pTDFX->ModeReg.vidcfg &= ~VIDPROCCFGMASK;
        pTDFX->writeLong(pTDFX, VIDPROCCFG, pTDFX->ModeReg.vidcfg);
	pPriv->isOn = FALSE;
    }

    return Success;
}


static int 
TDFXFreeSurface(
    XF86SurfacePtr surface
){
    OffscreenPrivPtr pPriv = (OffscreenPrivPtr)surface->devPrivate.ptr;

    if(pPriv->isOn)
	TDFXStopSurface(surface);
    xf86FreeOffscreenLinear(pPriv->linear);
    xfree(surface->pitches);
    xfree(surface->offsets);
    xfree(surface->devPrivate.ptr);

    return Success;
}

static int
TDFXGetSurfaceAttribute(
    ScrnInfoPtr pScrn,
    Atom attribute,
    INT32 *value
){
    return TDFXGetPortAttributeOverlay(pScrn, attribute, value, 
			(pointer)(GET_PORT_PRIVATE(pScrn)));
}

static int
TDFXSetSurfaceAttribute(
    ScrnInfoPtr pScrn,
    Atom attribute,
    INT32 value
){
    return TDFXSetPortAttributeOverlay(pScrn, attribute, value, 
			(pointer)(GET_PORT_PRIVATE(pScrn)));
}

static int 
TDFXDisplaySurface(
    XF86SurfacePtr surface,
    short src_x, short src_y, 
    short drw_x, short drw_y,
    short src_w, short src_h, 
    short drw_w, short drw_h,
    RegionPtr clipBoxes
){
    OffscreenPrivPtr pPriv = (OffscreenPrivPtr)surface->devPrivate.ptr;
    ScrnInfoPtr pScrn = surface->pScrn;
    TDFXPtr pTDFX = TDFXPTR(pScrn);
    TDFXPortPrivPtr portPriv = pTDFX->overlayAdaptor->pPortPrivates[0].ptr;
    INT32 x1, y1, x2, y2;
    BoxRec dstBox;

    x1 = src_x;
    x2 = src_x + src_w;
    y1 = src_y;
    y2 = src_y + src_h;

    dstBox.x1 = drw_x;
    dstBox.x2 = drw_x + drw_w;
    dstBox.y1 = drw_y;
    dstBox.y2 = drw_y + drw_h;

    if(!xf86XVClipVideoHelper(&dstBox, &x1, &x2, &y1, &y2, clipBoxes, 
			      surface->width, surface->height))
    {
	return Success;
    }

    dstBox.x1 -= pScrn->frameX0;
    dstBox.x2 -= pScrn->frameX0;
    dstBox.y1 -= pScrn->frameY0;
    dstBox.y2 -= pScrn->frameY0;

#if 0
    TDFXResetVideoOverlay(pScrn);
#endif

    TDFXDisplayVideoOverlay(pScrn, surface->id, surface->offsets[0], 
	     surface->width, surface->height, surface->pitches[0],
	     x1, y1, x2, &dstBox, src_w, src_h, drw_w, drw_h);

    xf86XVFillKeyHelper(pScrn->pScreen, portPriv->colorKey, clipBoxes);

    pPriv->isOn = TRUE;
    /* we've prempted the XvImage stream so set its free timer */
    if(portPriv->videoStatus & CLIENT_VIDEO_ON) {
	REGION_EMPTY(pScrn->pScreen, &portPriv->clip);   
	UpdateCurrentTime();
	portPriv->videoStatus = FREE_TIMER;
	portPriv->freeTime = currentTime.milliseconds + FREE_DELAY;
	pTDFX->VideoTimerCallback = TDFXVideoTimerCallback;
    }

    return Success;
}

static void 
TDFXInitOffscreenImages(ScreenPtr pScreen)
{
    XF86OffscreenImagePtr offscreenImages;

    /* need to free this someplace */
    if(!(offscreenImages = xalloc(sizeof(XF86OffscreenImageRec))))
	return;

    offscreenImages[0].image = &OverlayImages[0];
    offscreenImages[0].flags = VIDEO_OVERLAID_IMAGES | 
			       VIDEO_CLIP_TO_VIEWPORT;
    offscreenImages[0].alloc_surface = TDFXAllocateSurface;
    offscreenImages[0].free_surface = TDFXFreeSurface;
    offscreenImages[0].display = TDFXDisplaySurface;
    offscreenImages[0].stop = TDFXStopSurface;
    offscreenImages[0].setAttribute = TDFXSetSurfaceAttribute;
    offscreenImages[0].getAttribute = TDFXGetSurfaceAttribute;
    offscreenImages[0].max_width = 2048;
    offscreenImages[0].max_height = 2048;
    offscreenImages[0].num_attributes = 2;
    offscreenImages[0].attributes = OverlayAttributes;
    
    xf86XVRegisterOffscreenImages(pScreen, offscreenImages, 1);
}