src/gallium/state_trackers/xorg/xvmc/surface.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 Younes Manton.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <assert.h>
  29 #include <stdio.h>
  30
  31 #include <X11/Xlibint.h>
  32
  33 #include <pipe/p_video_context.h>
  34 #include <pipe/p_video_state.h>
  35 #include <pipe/p_state.h>
  36
  37 #include <util/u_inlines.h>
  38 #include <util/u_memory.h>
  39 #include <util/u_math.h>
  40
  41 #include <vl_winsys.h>
  42
  43 #include "xvmc_private.h"
  44
  45 static const unsigned const_empty_block_mask_420[3][2][2] = {
  46    { { 0x20, 0x10 },  { 0x08, 0x04 } },
  47    { { 0x02, 0x02 },  { 0x02, 0x02 } },
  48    { { 0x01, 0x01 },  { 0x01, 0x01 } }
  49 };
  50
  51 static enum pipe_mpeg12_picture_type PictureToPipe(int xvmc_pic)
  52 {
  53    switch (xvmc_pic) {
  54       case XVMC_TOP_FIELD:
  55          return PIPE_MPEG12_PICTURE_TYPE_FIELD_TOP;
  56       case XVMC_BOTTOM_FIELD:
  57          return PIPE_MPEG12_PICTURE_TYPE_FIELD_BOTTOM;
  58       case XVMC_FRAME_PICTURE:
  59          return PIPE_MPEG12_PICTURE_TYPE_FRAME;
  60       default:
  61          assert(0);
  62    }
  63
  64    XVMC_MSG(XVMC_ERR, "[XvMC] Unrecognized picture type 0x%08X.\n", xvmc_pic);
  65
  66    return -1;
  67 }
  68
  69 static inline void
  70 MacroBlockTypeToPipeWeights(const XvMCMacroBlock *xvmc_mb, unsigned weights[2])
  71 {
  72    assert(xvmc_mb);
  73
  74    switch (xvmc_mb->macroblock_type & (XVMC_MB_TYPE_MOTION_FORWARD | XVMC_MB_TYPE_MOTION_BACKWARD)) {
  75    case XVMC_MB_TYPE_MOTION_FORWARD:
  76       weights[0] = PIPE_VIDEO_MV_WEIGHT_MAX;
  77       weights[1] = PIPE_VIDEO_MV_WEIGHT_MIN;
  78       break;
  79
  80    case (XVMC_MB_TYPE_MOTION_FORWARD | XVMC_MB_TYPE_MOTION_BACKWARD):
  81       weights[0] = PIPE_VIDEO_MV_WEIGHT_HALF;
  82       weights[1] = PIPE_VIDEO_MV_WEIGHT_HALF;
  83       break;
  84
  85    case XVMC_MB_TYPE_MOTION_BACKWARD:
  86       weights[0] = PIPE_VIDEO_MV_WEIGHT_MIN;
  87       weights[1] = PIPE_VIDEO_MV_WEIGHT_MAX;
  88       break;
  89
  90    default:
  91       /* workaround for xines xxmc video out plugin */
  92       if (!(xvmc_mb->macroblock_type & ~XVMC_MB_TYPE_PATTERN)) {
  93          weights[0] = PIPE_VIDEO_MV_WEIGHT_MAX;
  94          weights[1] = PIPE_VIDEO_MV_WEIGHT_MIN;
  95       } else {
  96          weights[0] = PIPE_VIDEO_MV_WEIGHT_MIN;
  97          weights[1] = PIPE_VIDEO_MV_WEIGHT_MIN;
  98       }
  99       break;
 100    }
 101 }
 102
 103 static inline struct pipe_motionvector
 104 MotionVectorToPipe(const XvMCMacroBlock *xvmc_mb, unsigned vector,
 105                    unsigned field_select_mask, unsigned weight)
 106 {
 107    struct pipe_motionvector mv;
 108
 109    assert(xvmc_mb);
 110
 111    switch (xvmc_mb->motion_type) {
 112    case XVMC_PREDICTION_FRAME:
 113       mv.top.x = xvmc_mb->PMV[0][vector][0];
 114       mv.top.y = xvmc_mb->PMV[0][vector][1];
 115       mv.top.field_select = PIPE_VIDEO_FRAME;
 116       mv.top.weight = weight;
 117
 118       mv.bottom.x = xvmc_mb->PMV[0][vector][0];
 119       mv.bottom.y = xvmc_mb->PMV[0][vector][1];
 120       mv.bottom.weight = weight;
 121       mv.bottom.field_select = PIPE_VIDEO_FRAME;
 122       break;
 123
 124    case XVMC_PREDICTION_FIELD:
 125       mv.top.x = xvmc_mb->PMV[0][vector][0];
 126       mv.top.y = xvmc_mb->PMV[0][vector][1];
 127       mv.top.field_select = (xvmc_mb->motion_vertical_field_select & field_select_mask) ?
 128          PIPE_VIDEO_BOTTOM_FIELD : PIPE_VIDEO_TOP_FIELD;
 129       mv.top.weight = weight;
 130
 131       mv.bottom.x = xvmc_mb->PMV[1][vector][0];
 132       mv.bottom.y = xvmc_mb->PMV[1][vector][1];
 133       mv.bottom.field_select = (xvmc_mb->motion_vertical_field_select & (field_select_mask << 2)) ?
 134          PIPE_VIDEO_BOTTOM_FIELD : PIPE_VIDEO_TOP_FIELD;
 135       mv.bottom.weight = weight;
 136       break;
 137
 138    default: // TODO: Support DUALPRIME and 16x8
 139       break;
 140    }
 141
 142    return mv;
 143 }
 144
 145 static inline void
 146 UploadYcbcrBlocks(XvMCSurfacePrivate *surface,
 147                   const XvMCMacroBlock *xvmc_mb,
 148                   const XvMCBlockArray *xvmc_blocks)
 149 {
 150    enum pipe_mpeg12_dct_intra intra;
 151    enum pipe_mpeg12_dct_type coding;
 152
 153    unsigned tb, x, y;
 154    short *blocks;
 155
 156    assert(surface);
 157    assert(xvmc_mb);
 158
 159    intra = xvmc_mb->macroblock_type & XVMC_MB_TYPE_INTRA ?
 160            PIPE_MPEG12_DCT_INTRA : PIPE_MPEG12_DCT_DELTA;
 161
 162    coding = xvmc_mb->dct_type == XVMC_DCT_TYPE_FIELD ?
 163             PIPE_MPEG12_DCT_TYPE_FIELD : PIPE_MPEG12_DCT_TYPE_FRAME;
 164
 165    blocks = xvmc_blocks->blocks + xvmc_mb->index * BLOCK_SIZE_SAMPLES;
 166
 167    for (y = 0; y < 2; ++y) {
 168       for (x = 0; x < 2; ++x, ++tb) {
 169          if (xvmc_mb->coded_block_pattern & const_empty_block_mask_420[0][y][x]) {
 170
 171             struct pipe_ycbcr_block *stream = surface->ycbcr[0].stream;
 172             stream->x = xvmc_mb->x * 2 + x;
 173             stream->y = xvmc_mb->y * 2 + y;
 174             stream->intra = intra;
 175             stream->coding = coding;
 176
 177             memcpy(surface->ycbcr[0].buffer, blocks, BLOCK_SIZE_BYTES);
 178
 179             surface->ycbcr[0].num_blocks_added++;
 180             surface->ycbcr[0].stream++;
 181             surface->ycbcr[0].buffer += BLOCK_SIZE_SAMPLES;
 182             blocks += BLOCK_SIZE_SAMPLES;
 183          }
 184       }
 185    }
 186
 187    /* TODO: Implement 422, 444 */
 188    //assert(ctx->base.chroma_format == PIPE_VIDEO_CHROMA_FORMAT_420);
 189
 190    for (tb = 1; tb < 3; ++tb) {
 191       if (xvmc_mb->coded_block_pattern & const_empty_block_mask_420[tb][0][0]) {
 192
 193          struct pipe_ycbcr_block *stream = surface->ycbcr[tb].stream;
 194          stream->x = xvmc_mb->x;
 195          stream->y = xvmc_mb->y;
 196          stream->intra = intra;
 197          stream->coding = PIPE_MPEG12_DCT_TYPE_FRAME;
 198
 199          memcpy(surface->ycbcr[tb].buffer, blocks, BLOCK_SIZE_BYTES);
 200
 201          surface->ycbcr[tb].num_blocks_added++;
 202          surface->ycbcr[tb].stream++;
 203          surface->ycbcr[tb].buffer += BLOCK_SIZE_SAMPLES;
 204          blocks += BLOCK_SIZE_SAMPLES;
 205       }
 206    }
 207
 208 }
 209
 210 static void
 211 MacroBlocksToPipe(XvMCSurfacePrivate *surface,
 212                   unsigned int xvmc_picture_structure,
 213                   const XvMCMacroBlock *xvmc_mb,
 214                   const XvMCBlockArray *xvmc_blocks,
 215                   unsigned int num_macroblocks)
 216 {
 217    unsigned int i, j;
 218
 219    assert(xvmc_mb);
 220    assert(xvmc_blocks);
 221    assert(num_macroblocks);
 222
 223    for (i = 0; i < num_macroblocks; ++i) {
 224       unsigned mv_pos = xvmc_mb->x + surface->mv_stride * xvmc_mb->y;
 225       unsigned mv_weights[2];
 226
 227       UploadYcbcrBlocks(surface, xvmc_mb, xvmc_blocks);
 228
 229       MacroBlockTypeToPipeWeights(xvmc_mb, mv_weights);
 230
 231       for (j = 0; j < 2; ++j) {
 232          if (!surface->ref[j].mv) continue;
 233
 234          surface->ref[j].mv[mv_pos] = MotionVectorToPipe
 235          (
 236             xvmc_mb, j,
 237             j ? XVMC_SELECT_FIRST_BACKWARD : XVMC_SELECT_FIRST_FORWARD,
 238             mv_weights[j]
 239          );
 240       }
 241
 242       ++xvmc_mb;
 243    }
 244 }
 245
 246 static void
 247 unmap_and_flush_surface(XvMCSurfacePrivate *surface)
 248 {
 249    struct pipe_video_buffer *ref_frames[2];
 250    XvMCContextPrivate *context_priv;
 251    unsigned i, num_ycbcr_blocks[3];
 252
 253    assert(surface);
 254
 255    context_priv = surface->context->privData;
 256
 257    for ( i = 0; i < 2; ++i ) {
 258       if (surface->ref[i].surface) {
 259          XvMCSurfacePrivate *ref = surface->ref[i].surface->privData;
 260
 261          assert(ref);
 262
 263          unmap_and_flush_surface(ref);
 264          surface->ref[i].surface = NULL;
 265          ref_frames[i] = ref->video_buffer;
 266       } else {
 267          ref_frames[i] = NULL;
 268       }
 269    }
 270
 271    if (surface->mapped) {
 272       surface->decode_buffer->unmap(surface->decode_buffer);
 273       for (i = 0; i < 3; ++i)
 274          num_ycbcr_blocks[i] = surface->ycbcr[i].num_blocks_added;
 275       context_priv->decoder->flush_buffer(surface->decode_buffer,
 276                                           num_ycbcr_blocks,
 277                                           ref_frames,
 278                                           surface->video_buffer,
 279                                           &surface->flush_fence);
 280       surface->mapped = 0;
 281    }
 282 }
 283
 284 PUBLIC
 285 Status XvMCCreateSurface(Display *dpy, XvMCContext *context, XvMCSurface *surface)
 286 {
 287    const enum pipe_format resource_formats[3] = {
 288       PIPE_FORMAT_R8_SNORM,
 289       PIPE_FORMAT_R8_SNORM,
 290       PIPE_FORMAT_R8_SNORM
 291    };
 292
 293    XvMCContextPrivate *context_priv;
 294    struct pipe_video_context *vpipe;
 295    XvMCSurfacePrivate *surface_priv;
 296
 297    XVMC_MSG(XVMC_TRACE, "[XvMC] Creating surface %p.\n", surface);
 298
 299    assert(dpy);
 300
 301    if (!context)
 302       return XvMCBadContext;
 303    if (!surface)
 304       return XvMCBadSurface;
 305
 306    context_priv = context->privData;
 307    vpipe = context_priv->vctx->vpipe;
 308
 309    surface_priv = CALLOC(1, sizeof(XvMCSurfacePrivate));
 310    if (!surface_priv)
 311       return BadAlloc;
 312
 313    surface_priv->decode_buffer = context_priv->decoder->create_buffer(context_priv->decoder);
 314    surface_priv->mv_stride = surface_priv->decode_buffer->get_mv_stream_stride(surface_priv->decode_buffer);
 315    surface_priv->video_buffer = vpipe->create_buffer(vpipe, PIPE_FORMAT_YV12, //TODO
 316                                                      resource_formats,
 317                                                      context_priv->decoder->chroma_format,
 318                                                      context_priv->decoder->width,
 319                                                      context_priv->decoder->height);
 320    surface_priv->context = context;
 321
 322    surface->surface_id = XAllocID(dpy);
 323    surface->context_id = context->context_id;
 324    surface->surface_type_id = context->surface_type_id;
 325    surface->width = context->width;
 326    surface->height = context->height;
 327    surface->privData = surface_priv;
 328
 329    SyncHandle();
 330
 331    XVMC_MSG(XVMC_TRACE, "[XvMC] Surface %p created.\n", surface);
 332
 333    return Success;
 334 }
 335
 336 PUBLIC
 337 Status XvMCRenderSurface(Display *dpy, XvMCContext *context, unsigned int picture_structure,
 338                          XvMCSurface *target_surface, XvMCSurface *past_surface, XvMCSurface *future_surface,
 339                          unsigned int flags, unsigned int num_macroblocks, unsigned int first_macroblock,
 340                          XvMCMacroBlockArray *macroblocks, XvMCBlockArray *blocks
 341 )
 342 {
 343    struct pipe_video_context *vpipe;
 344    struct pipe_video_decode_buffer *t_buffer;
 345
 346    XvMCContextPrivate *context_priv;
 347    XvMCSurfacePrivate *target_surface_priv;
 348    XvMCSurfacePrivate *past_surface_priv;
 349    XvMCSurfacePrivate *future_surface_priv;
 350    XvMCMacroBlock *xvmc_mb;
 351
 352    unsigned i;
 353
 354    XVMC_MSG(XVMC_TRACE, "[XvMC] Rendering to surface %p, with past %p and future %p\n",
 355             target_surface, past_surface, future_surface);
 356
 357    assert(dpy);
 358
 359    if (!context || !context->privData)
 360       return XvMCBadContext;
 361    if (!target_surface || !target_surface->privData)
 362       return XvMCBadSurface;
 363
 364    if (picture_structure != XVMC_TOP_FIELD &&
 365        picture_structure != XVMC_BOTTOM_FIELD &&
 366        picture_structure != XVMC_FRAME_PICTURE)
 367       return BadValue;
 368    /* Bkwd pred equivalent to fwd (past && !future) */
 369    if (future_surface && !past_surface)
 370       return BadMatch;
 371
 372    assert(context->context_id == target_surface->context_id);
 373    assert(!past_surface || context->context_id == past_surface->context_id);
 374    assert(!future_surface || context->context_id == future_surface->context_id);
 375
 376    assert(macroblocks);
 377    assert(blocks);
 378
 379    assert(macroblocks->context_id == context->context_id);
 380    assert(blocks->context_id == context->context_id);
 381
 382    assert(flags == 0 || flags == XVMC_SECOND_FIELD);
 383
 384    target_surface_priv = target_surface->privData;
 385    past_surface_priv = past_surface ? past_surface->privData : NULL;
 386    future_surface_priv = future_surface ? future_surface->privData : NULL;
 387
 388    assert(target_surface_priv->context == context);
 389    assert(!past_surface || past_surface_priv->context == context);
 390    assert(!future_surface || future_surface_priv->context == context);
 391
 392    context_priv = context->privData;
 393    vpipe = context_priv->vctx->vpipe;
 394
 395    t_buffer = target_surface_priv->decode_buffer;
 396
 397    // enshure that all reference frames are flushed
 398    // not really nessasary, but speeds ups rendering
 399    if (past_surface)
 400       unmap_and_flush_surface(past_surface->privData);
 401
 402    if (future_surface)
 403       unmap_and_flush_surface(future_surface->privData);
 404
 405    xvmc_mb = macroblocks->macro_blocks + first_macroblock;
 406
 407    /* If the surface we're rendering hasn't changed the ref frames shouldn't change. */
 408    if (target_surface_priv->mapped && (
 409        target_surface_priv->ref[0].surface != past_surface ||
 410        target_surface_priv->ref[1].surface != future_surface ||
 411        (xvmc_mb->x == 0 && xvmc_mb->y == 0))) {
 412
 413       // If they change anyway we need to clear our surface
 414       unmap_and_flush_surface(target_surface_priv);
 415    }
 416
 417    if (!target_surface_priv->mapped) {
 418       t_buffer->map(t_buffer);
 419
 420       for (i = 0; i < 3; ++i) {
 421          target_surface_priv->ycbcr[i].num_blocks_added = 0;
 422          target_surface_priv->ycbcr[i].stream = t_buffer->get_ycbcr_stream(t_buffer, i);
 423          target_surface_priv->ycbcr[i].buffer = t_buffer->get_ycbcr_buffer(t_buffer, i);
 424       }
 425
 426       for (i = 0; i < 2; ++i) {
 427          target_surface_priv->ref[i].surface = i == 0 ? past_surface : future_surface;
 428
 429          if (target_surface_priv->ref[i].surface)
 430             target_surface_priv->ref[i].mv = t_buffer->get_mv_stream(t_buffer, i);
 431          else
 432             target_surface_priv->ref[i].mv = NULL;
 433       }
 434
 435       target_surface_priv->mapped = 1;
 436    }
 437
 438    MacroBlocksToPipe(target_surface_priv, picture_structure, xvmc_mb, blocks, num_macroblocks);
 439
 440    XVMC_MSG(XVMC_TRACE, "[XvMC] Submitted surface %p for rendering.\n", target_surface);
 441
 442    return Success;
 443 }
 444
 445 PUBLIC
 446 Status XvMCFlushSurface(Display *dpy, XvMCSurface *surface)
 447 {
 448    assert(dpy);
 449
 450    if (!surface)
 451       return XvMCBadSurface;
 452
 453    // don't call flush here, because this is usually
 454    // called once for every slice instead of every frame
 455
 456    XVMC_MSG(XVMC_TRACE, "[XvMC] Flushing surface %p\n", surface);
 457
 458    return Success;
 459 }
 460
 461 PUBLIC
 462 Status XvMCSyncSurface(Display *dpy, XvMCSurface *surface)
 463 {
 464    assert(dpy);
 465
 466    if (!surface)
 467       return XvMCBadSurface;
 468
 469    XVMC_MSG(XVMC_TRACE, "[XvMC] Syncing surface %p\n", surface);
 470
 471    return Success;
 472 }
 473
 474 PUBLIC
 475 Status XvMCPutSurface(Display *dpy, XvMCSurface *surface, Drawable drawable,
 476                       short srcx, short srcy, unsigned short srcw, unsigned short srch,
 477                       short destx, short desty, unsigned short destw, unsigned short desth,
 478                       int flags)
 479 {
 480    static int dump_window = -1;
 481
 482    struct pipe_video_context *vpipe;
 483    struct pipe_video_compositor *compositor;
 484
 485    XvMCSurfacePrivate *surface_priv;
 486    XvMCContextPrivate *context_priv;
 487    XvMCSubpicturePrivate *subpicture_priv;
 488    XvMCContext *context;
 489    struct pipe_video_rect src_rect = {srcx, srcy, srcw, srch};
 490    struct pipe_video_rect dst_rect = {destx, desty, destw, desth};
 491    struct pipe_surface *drawable_surface;
 492
 493    XVMC_MSG(XVMC_TRACE, "[XvMC] Displaying surface %p.\n", surface);
 494
 495    assert(dpy);
 496
 497    if (!surface || !surface->privData)
 498       return XvMCBadSurface;
 499
 500    surface_priv = surface->privData;
 501    context = surface_priv->context;
 502    context_priv = context->privData;
 503
 504    drawable_surface = vl_drawable_surface_get(context_priv->vctx, drawable);
 505    if (!drawable_surface)
 506       return BadDrawable;
 507
 508    assert(flags == XVMC_TOP_FIELD || flags == XVMC_BOTTOM_FIELD || flags == XVMC_FRAME_PICTURE);
 509    assert(srcx + srcw - 1 < surface->width);
 510    assert(srcy + srch - 1 < surface->height);
 511    /*
 512     * Some apps (mplayer) hit these asserts because they call
 513     * this function after the window has been resized by the WM
 514     * but before they've handled the corresponding XEvent and
 515     * know about the new dimensions. The output should be clipped
 516     * until the app updates destw and desth.
 517     */
 518    /*
 519    assert(destx + destw - 1 < drawable_surface->width);
 520    assert(desty + desth - 1 < drawable_surface->height);
 521     */
 522
 523    subpicture_priv = surface_priv->subpicture ? surface_priv->subpicture->privData : NULL;
 524    vpipe = context_priv->vctx->vpipe;
 525    compositor = context_priv->compositor;
 526
 527    unmap_and_flush_surface(surface_priv);
 528
 529    compositor->clear_layers(compositor);
 530    compositor->set_buffer_layer(compositor, 0, surface_priv->video_buffer, &src_rect, NULL);
 531
 532    if (subpicture_priv) {
 533       XVMC_MSG(XVMC_TRACE, "[XvMC] Surface %p has subpicture %p.\n", surface, surface_priv->subpicture);
 534
 535       assert(subpicture_priv->surface == surface);
 536
 537       if (subpicture_priv->palette)
 538          compositor->set_palette_layer(compositor, 1, subpicture_priv->sampler, subpicture_priv->palette,
 539                                        &subpicture_priv->src_rect, &subpicture_priv->dst_rect);
 540       else
 541          compositor->set_rgba_layer(compositor, 1, subpicture_priv->sampler, &src_rect, &dst_rect);
 542
 543       surface_priv->subpicture = NULL;
 544       subpicture_priv->surface = NULL;
 545    }
 546
 547    compositor->render_picture(compositor, PictureToPipe(flags), drawable_surface, &dst_rect, &surface_priv->disp_fence);
 548
 549    XVMC_MSG(XVMC_TRACE, "[XvMC] Submitted surface %p for display. Pushing to front buffer.\n", surface);
 550
 551    vpipe->screen->flush_frontbuffer
 552    (
 553       vpipe->screen,
 554       drawable_surface->texture,
 555       0, 0,
 556       vl_contextprivate_get(context_priv->vctx, drawable_surface)
 557    );
 558
 559    pipe_surface_reference(&drawable_surface, NULL);
 560
 561    if(dump_window == -1) {
 562       dump_window = debug_get_num_option("XVMC_DUMP", 0);
 563    }
 564
 565    if(dump_window) {
 566       static unsigned int framenum = 0;
 567       char cmd[256];
 568
 569       sprintf(cmd, "xwd -id %d -out xvmc_frame_%08d.xwd", (int)drawable, ++framenum);
 570       if (system(cmd) != 0)
 571          XVMC_MSG(XVMC_ERR, "[XvMC] Dumping surface %p failed.\n", surface);
 572    }
 573
 574    XVMC_MSG(XVMC_TRACE, "[XvMC] Pushed surface %p to front buffer.\n", surface);
 575
 576    return Success;
 577 }
 578
 579 PUBLIC
 580 Status XvMCGetSurfaceStatus(Display *dpy, XvMCSurface *surface, int *status)
 581 {
 582    assert(dpy);
 583
 584    if (!surface)
 585       return XvMCBadSurface;
 586
 587    assert(status);
 588
 589    *status = 0;
 590
 591    return Success;
 592 }
 593
 594 PUBLIC
 595 Status XvMCDestroySurface(Display *dpy, XvMCSurface *surface)
 596 {
 597    XvMCSurfacePrivate *surface_priv;
 598
 599    XVMC_MSG(XVMC_TRACE, "[XvMC] Destroying surface %p.\n", surface);
 600
 601    assert(dpy);
 602
 603    if (!surface || !surface->privData)
 604       return XvMCBadSurface;
 605
 606    surface_priv = surface->privData;
 607    surface_priv->decode_buffer->destroy(surface_priv->decode_buffer);
 608    surface_priv->video_buffer->destroy(surface_priv->video_buffer);
 609    FREE(surface_priv);
 610    surface->privData = NULL;
 611
 612    XVMC_MSG(XVMC_TRACE, "[XvMC] Surface %p destroyed.\n", surface);
 613
 614    return Success;
 615 }
 616
 617 PUBLIC
 618 Status XvMCHideSurface(Display *dpy, XvMCSurface *surface)
 619 {
 620    assert(dpy);
 621
 622    if (!surface || !surface->privData)
 623       return XvMCBadSurface;
 624
 625    /* No op, only for overlaid rendering */
 626
 627    return Success;
 628 }