src/gallium/auxiliary/vl/vl_mpeg12_context.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 "util/u_inlines.h"
  29 #include "util/u_memory.h"
  30
  31 #include "vl_mpeg12_context.h"
  32 #include "vl_defines.h"
  33 #include <pipe/p_shader_tokens.h>
  34 #include <util/u_inlines.h>
  35 #include <util/u_memory.h>
  36 #include <util/u_keymap.h>
  37 #include <util/u_rect.h>
  38 #include <util/u_video.h>
  39 #include <util/u_surface.h>
  40
  41 #define NUM_BUFFERS 2
  42
  43 static const unsigned const_empty_block_mask_420[3][2][2] = {
  44         { { 0x20, 0x10 },  { 0x08, 0x04 } },
  45         { { 0x02, 0x02 },  { 0x02, 0x02 } },
  46         { { 0x01, 0x01 },  { 0x01, 0x01 } }
  47 };
  48
  49 static void
  50 flush_buffer(struct vl_mpeg12_context *ctx)
  51 {
  52    unsigned ne_start, ne_num, e_start, e_num;
  53    assert(ctx);
  54
  55    if(ctx->cur_buffer != NULL) {
  56
  57       vl_vb_unmap(&ctx->cur_buffer->vertex_stream, ctx->pipe);
  58       vl_idct_unmap_buffers(&ctx->idct_y, &ctx->cur_buffer->idct_y);
  59       vl_idct_unmap_buffers(&ctx->idct_cr, &ctx->cur_buffer->idct_cr);
  60       vl_idct_unmap_buffers(&ctx->idct_cb, &ctx->cur_buffer->idct_cb);
  61       vl_vb_restart(&ctx->cur_buffer->vertex_stream,
  62                     &ne_start, &ne_num, &e_start, &e_num);
  63
  64       ctx->pipe->set_vertex_buffers(ctx->pipe, 2, ctx->cur_buffer->vertex_bufs.all);
  65       ctx->pipe->bind_vertex_elements_state(ctx->pipe, ctx->vertex_elems_state);
  66       vl_idct_flush(&ctx->idct_y, &ctx->cur_buffer->idct_y, ne_num);
  67       vl_idct_flush(&ctx->idct_cr, &ctx->cur_buffer->idct_cr, ne_num);
  68       vl_idct_flush(&ctx->idct_cb, &ctx->cur_buffer->idct_cb, ne_num);
  69       vl_mpeg12_mc_renderer_flush(&ctx->mc_renderer, &ctx->cur_buffer->mc,
  70                                   ne_start, ne_num, e_start, e_num);
  71
  72       ctx->cur_buffer = NULL;
  73    }
  74 }
  75
  76 static void
  77 rotate_buffer(struct vl_mpeg12_context *ctx)
  78 {
  79    struct pipe_resource *y, *cr, *cb;
  80    static unsigned key = 0;
  81    struct vl_mpeg12_buffer *buffer;
  82
  83    assert(ctx);
  84
  85    flush_buffer(ctx);
  86
  87    buffer = (struct vl_mpeg12_buffer*)util_keymap_lookup(ctx->buffer_map, &key);
  88    if (!buffer) {
  89       boolean added_to_map;
  90
  91       buffer = CALLOC_STRUCT(vl_mpeg12_buffer);
  92       if (buffer == NULL)
  93          return;
  94
  95       buffer->vertex_bufs.individual.quad.stride = ctx->quads.stride;
  96       buffer->vertex_bufs.individual.quad.buffer_offset = ctx->quads.buffer_offset;
  97       pipe_resource_reference(&buffer->vertex_bufs.individual.quad.buffer, ctx->quads.buffer);
  98
  99       buffer->vertex_bufs.individual.stream = vl_vb_init(&buffer->vertex_stream, ctx->pipe,
 100                                                          ctx->vertex_buffer_size);
 101       if (!(y = vl_idct_init_buffer(&ctx->idct_y, &buffer->idct_y))) {
 102          FREE(buffer);
 103          return;
 104       }
 105
 106       if (!(cr = vl_idct_init_buffer(&ctx->idct_cr, &buffer->idct_cr))) {
 107          FREE(buffer);
 108          return;
 109       }
 110
 111       if (!(cb = vl_idct_init_buffer(&ctx->idct_cb, &buffer->idct_cb))) {
 112          FREE(buffer);
 113          return;
 114       }
 115
 116       if(!vl_mpeg12_mc_init_buffer(&ctx->mc_renderer, &buffer->mc, y, cr, cb)) {
 117          FREE(buffer);
 118          return;
 119       }
 120
 121       added_to_map = util_keymap_insert(ctx->buffer_map, &key, buffer, ctx);
 122       assert(added_to_map);
 123    }
 124    ++key;
 125    key %= NUM_BUFFERS;
 126    ctx->cur_buffer = buffer;
 127
 128    vl_vb_map(&ctx->cur_buffer->vertex_stream, ctx->pipe);
 129    vl_idct_map_buffers(&ctx->idct_y, &ctx->cur_buffer->idct_y);
 130    vl_idct_map_buffers(&ctx->idct_cr, &ctx->cur_buffer->idct_cr);
 131    vl_idct_map_buffers(&ctx->idct_cb, &ctx->cur_buffer->idct_cb);
 132 }
 133
 134 static void
 135 delete_buffer(const struct keymap *map,
 136               const void *key, void *data,
 137               void *user)
 138 {
 139    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)user;
 140    struct vl_mpeg12_buffer *buf = (struct vl_mpeg12_buffer*)data;
 141
 142    assert(map);
 143    assert(key);
 144    assert(data);
 145    assert(user);
 146
 147    vl_vb_cleanup(&buf->vertex_stream);
 148    vl_idct_cleanup_buffer(&ctx->idct_y, &buf->idct_y);
 149    vl_idct_cleanup_buffer(&ctx->idct_cb, &buf->idct_cb);
 150    vl_idct_cleanup_buffer(&ctx->idct_cr, &buf->idct_cr);
 151    vl_mpeg12_mc_cleanup_buffer(&ctx->mc_renderer, &buf->mc);
 152 }
 153
 154 static void
 155 upload_buffer(struct vl_mpeg12_context *ctx,
 156               struct vl_mpeg12_buffer *buffer,
 157               struct pipe_mpeg12_macroblock *mb)
 158 {
 159    short *blocks;
 160    unsigned tb, x, y;
 161
 162    assert(ctx);
 163    assert(buffer);
 164    assert(mb);
 165
 166    blocks = mb->blocks;
 167
 168    for (y = 0; y < 2; ++y) {
 169       for (x = 0; x < 2; ++x, ++tb) {
 170          if (mb->cbp & (*ctx->empty_block_mask)[0][y][x]) {
 171             vl_idct_add_block(&buffer->idct_y, mb->mbx * 2 + x, mb->mby * 2 + y, blocks);
 172             blocks += BLOCK_WIDTH * BLOCK_HEIGHT;
 173          }
 174       }
 175    }
 176
 177    /* TODO: Implement 422, 444 */
 178    assert(ctx->base.chroma_format == PIPE_VIDEO_CHROMA_FORMAT_420);
 179
 180    for (tb = 1; tb < 3; ++tb) {
 181       if (mb->cbp & (*ctx->empty_block_mask)[tb][0][0]) {
 182          if(tb == 1)
 183             vl_idct_add_block(&buffer->idct_cb, mb->mbx, mb->mby, blocks);
 184          else
 185             vl_idct_add_block(&buffer->idct_cr, mb->mbx, mb->mby, blocks);
 186          blocks += BLOCK_WIDTH * BLOCK_HEIGHT;
 187       }
 188    }
 189 }
 190
 191 static void
 192 vl_mpeg12_destroy(struct pipe_video_context *vpipe)
 193 {
 194    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 195
 196    assert(vpipe);
 197
 198    flush_buffer(ctx);
 199
 200    /* Asserted in softpipe_delete_fs_state() for some reason */
 201    ctx->pipe->bind_vs_state(ctx->pipe, NULL);
 202    ctx->pipe->bind_fs_state(ctx->pipe, NULL);
 203
 204    ctx->pipe->delete_blend_state(ctx->pipe, ctx->blend);
 205    ctx->pipe->delete_rasterizer_state(ctx->pipe, ctx->rast);
 206    ctx->pipe->delete_depth_stencil_alpha_state(ctx->pipe, ctx->dsa);
 207
 208    pipe_surface_reference(&ctx->decode_target, NULL);
 209    vl_compositor_cleanup(&ctx->compositor);
 210    util_delete_keymap(ctx->buffer_map, ctx);
 211    vl_mpeg12_mc_renderer_cleanup(&ctx->mc_renderer);
 212    vl_idct_cleanup(&ctx->idct_y);
 213    vl_idct_cleanup(&ctx->idct_cr);
 214    vl_idct_cleanup(&ctx->idct_cb);
 215    ctx->pipe->delete_vertex_elements_state(ctx->pipe, ctx->vertex_elems_state);
 216    pipe_resource_reference(&ctx->quads.buffer, NULL);
 217    ctx->pipe->destroy(ctx->pipe);
 218
 219    FREE(ctx);
 220 }
 221
 222 static int
 223 vl_mpeg12_get_param(struct pipe_video_context *vpipe, int param)
 224 {
 225    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 226
 227    assert(vpipe);
 228
 229    switch (param) {
 230       case PIPE_CAP_NPOT_TEXTURES:
 231          /* XXX: Temporary; not all paths are NPOT-tested */
 232 #if 0
 233          return ctx->pipe->screen->get_param(ctx->pipe->screen, param);
 234 #endif
 235          return FALSE;
 236       case PIPE_CAP_DECODE_TARGET_PREFERRED_FORMAT:
 237          return ctx->decode_format;
 238       default:
 239       {
 240          debug_printf("vl_mpeg12_context: Unknown PIPE_CAP %d\n", param);
 241          return 0;
 242       }
 243    }
 244 }
 245
 246 static struct pipe_surface *
 247 vl_mpeg12_create_surface(struct pipe_video_context *vpipe,
 248                          struct pipe_resource *resource,
 249                          const struct pipe_surface *templat)
 250 {
 251    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 252
 253    assert(vpipe);
 254
 255    return ctx->pipe->create_surface(ctx->pipe, resource, templat);
 256 }
 257
 258 static boolean
 259 vl_mpeg12_is_format_supported(struct pipe_video_context *vpipe,
 260                               enum pipe_format format,
 261                               unsigned usage,
 262                               unsigned geom)
 263 {
 264    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 265
 266    assert(vpipe);
 267
 268    return ctx->pipe->screen->is_format_supported(ctx->pipe->screen, format,
 269                                                  PIPE_TEXTURE_2D,
 270                                                  0, usage);
 271 }
 272
 273 static void
 274 vl_mpeg12_decode_macroblocks(struct pipe_video_context *vpipe,
 275                              struct pipe_surface *past,
 276                              struct pipe_surface *future,
 277                              unsigned num_macroblocks,
 278                              struct pipe_macroblock *macroblocks,
 279                              struct pipe_fence_handle **fence)
 280 {
 281    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 282    struct pipe_mpeg12_macroblock *mpeg12_macroblocks = (struct pipe_mpeg12_macroblock*)macroblocks;
 283    unsigned i;
 284
 285    assert(vpipe);
 286    assert(num_macroblocks);
 287    assert(macroblocks);
 288    assert(macroblocks->codec == PIPE_VIDEO_CODEC_MPEG12);
 289    assert(ctx->decode_target);
 290    assert(ctx->cur_buffer);
 291
 292    for ( i = 0; i < num_macroblocks; ++i ) {
 293       vl_vb_add_block(&ctx->cur_buffer->vertex_stream, &mpeg12_macroblocks[i],
 294                       ctx->empty_block_mask);
 295       upload_buffer(ctx, ctx->cur_buffer, &mpeg12_macroblocks[i]);
 296    }
 297
 298    vl_mpeg12_mc_set_surfaces(&ctx->mc_renderer, &ctx->cur_buffer->mc,
 299                              ctx->decode_target, past, future, fence);
 300 }
 301
 302 static void
 303 vl_mpeg12_clear_render_target(struct pipe_video_context *vpipe,
 304                        struct pipe_surface *dst,
 305                        unsigned dstx, unsigned dsty,
 306                        const float *rgba,
 307                        unsigned width, unsigned height)
 308 {
 309    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 310
 311    assert(vpipe);
 312    assert(dst);
 313
 314    if (ctx->pipe->clear_render_target)
 315       ctx->pipe->clear_render_target(ctx->pipe, dst, rgba, dstx, dsty, width, height);
 316    else
 317       util_clear_render_target(ctx->pipe, dst, rgba, dstx, dsty, width, height);
 318 }
 319
 320 static void
 321 vl_mpeg12_resource_copy_region(struct pipe_video_context *vpipe,
 322                                struct pipe_resource *dst,
 323                                unsigned dstx, unsigned dsty, unsigned dstz,
 324                                struct pipe_resource *src,
 325                                unsigned srcx, unsigned srcy, unsigned srcz,
 326                                unsigned width, unsigned height)
 327 {
 328    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 329
 330    assert(vpipe);
 331    assert(dst);
 332
 333    struct pipe_box box;
 334    box.x = srcx;
 335    box.y = srcy;
 336    box.z = srcz;
 337    box.width = width;
 338    box.height = height;
 339
 340    if (ctx->pipe->resource_copy_region)
 341       ctx->pipe->resource_copy_region(ctx->pipe, dst, 0,
 342                                       dstx, dsty, dstz,
 343                                       src, 0, &box);
 344    else
 345       util_resource_copy_region(ctx->pipe, dst, 0,
 346                                 dstx, dsty, dstz,
 347                                 src, 0, &box);
 348 }
 349
 350 static struct pipe_transfer*
 351 vl_mpeg12_get_transfer(struct pipe_video_context *vpipe,
 352                        struct pipe_resource *resource,
 353                        unsigned level,
 354                        unsigned usage,  /* a combination of PIPE_TRANSFER_x */
 355                        const struct pipe_box *box)
 356 {
 357    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 358
 359    assert(vpipe);
 360    assert(resource);
 361    assert(box);
 362
 363    return ctx->pipe->get_transfer(ctx->pipe, resource, level, usage, box);
 364 }
 365
 366 static void
 367 vl_mpeg12_transfer_destroy(struct pipe_video_context *vpipe,
 368                            struct pipe_transfer *transfer)
 369 {
 370    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 371
 372    assert(vpipe);
 373    assert(transfer);
 374
 375    ctx->pipe->transfer_destroy(ctx->pipe, transfer);
 376 }
 377
 378 static void*
 379 vl_mpeg12_transfer_map(struct pipe_video_context *vpipe,
 380                        struct pipe_transfer *transfer)
 381 {
 382    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 383
 384    assert(vpipe);
 385    assert(transfer);
 386
 387    return ctx->pipe->transfer_map(ctx->pipe, transfer);
 388 }
 389
 390 static void
 391 vl_mpeg12_transfer_flush_region(struct pipe_video_context *vpipe,
 392                                 struct pipe_transfer *transfer,
 393                                 const struct pipe_box *box)
 394 {
 395    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 396
 397    assert(vpipe);
 398    assert(transfer);
 399    assert(box);
 400
 401    ctx->pipe->transfer_flush_region(ctx->pipe, transfer, box);
 402 }
 403
 404 static void
 405 vl_mpeg12_transfer_unmap(struct pipe_video_context *vpipe,
 406                          struct pipe_transfer *transfer)
 407 {
 408    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 409
 410    assert(vpipe);
 411    assert(transfer);
 412
 413    ctx->pipe->transfer_unmap(ctx->pipe, transfer);
 414 }
 415
 416 static void
 417 vl_mpeg12_transfer_inline_write(struct pipe_video_context *vpipe,
 418                                 struct pipe_resource *resource,
 419                                 unsigned level,
 420                                 unsigned usage, /* a combination of PIPE_TRANSFER_x */
 421                                 const struct pipe_box *box,
 422                                 const void *data,
 423                                 unsigned stride,
 424                                 unsigned slice_stride)
 425 {
 426    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 427
 428    assert(vpipe);
 429    assert(resource);
 430    assert(box);
 431    assert(data);
 432    assert(ctx->pipe->transfer_inline_write);
 433
 434    ctx->pipe->transfer_inline_write(ctx->pipe, resource, level, usage,
 435                                     box, data, stride, slice_stride);
 436 }
 437
 438 static void
 439 vl_mpeg12_render_picture(struct pipe_video_context     *vpipe,
 440                          struct pipe_surface           *src_surface,
 441                          enum pipe_mpeg12_picture_type picture_type,
 442                          /*unsigned                    num_past_surfaces,
 443                          struct pipe_surface           *past_surfaces,
 444                          unsigned                      num_future_surfaces,
 445                          struct pipe_surface           *future_surfaces,*/
 446                          struct pipe_video_rect        *src_area,
 447                          struct pipe_surface           *dst_surface,
 448                          struct pipe_video_rect        *dst_area,
 449                          struct pipe_fence_handle      **fence)
 450 {
 451    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 452
 453    assert(vpipe);
 454    assert(src_surface);
 455    assert(src_area);
 456    assert(dst_surface);
 457    assert(dst_area);
 458
 459    flush_buffer(ctx);
 460
 461    vl_compositor_render(&ctx->compositor, src_surface,
 462                         picture_type, src_area, dst_surface, dst_area, fence);
 463 }
 464
 465 static void
 466 vl_mpeg12_set_picture_background(struct pipe_video_context *vpipe,
 467                                   struct pipe_surface *bg,
 468                                   struct pipe_video_rect *bg_src_rect)
 469 {
 470    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 471
 472    assert(vpipe);
 473    assert(bg);
 474    assert(bg_src_rect);
 475
 476    vl_compositor_set_background(&ctx->compositor, bg, bg_src_rect);
 477 }
 478
 479 static void
 480 vl_mpeg12_set_picture_layers(struct pipe_video_context *vpipe,
 481                              struct pipe_surface *layers[],
 482                              struct pipe_video_rect *src_rects[],
 483                              struct pipe_video_rect *dst_rects[],
 484                              unsigned num_layers)
 485 {
 486    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 487
 488    assert(vpipe);
 489    assert((layers && src_rects && dst_rects) ||
 490           (!layers && !src_rects && !dst_rects));
 491
 492    vl_compositor_set_layers(&ctx->compositor, layers, src_rects, dst_rects, num_layers);
 493 }
 494
 495 static void
 496 vl_mpeg12_set_decode_target(struct pipe_video_context *vpipe,
 497                             struct pipe_surface *dt)
 498 {
 499    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 500
 501    assert(vpipe);
 502    assert(dt);
 503
 504    if (ctx->decode_target != dt || ctx->cur_buffer == NULL) {
 505       rotate_buffer(ctx);
 506
 507       pipe_surface_reference(&ctx->decode_target, dt);
 508    }
 509 }
 510
 511 static void
 512 vl_mpeg12_set_csc_matrix(struct pipe_video_context *vpipe, const float *mat)
 513 {
 514    struct vl_mpeg12_context *ctx = (struct vl_mpeg12_context*)vpipe;
 515
 516    assert(vpipe);
 517
 518    vl_compositor_set_csc_matrix(&ctx->compositor, mat);
 519 }
 520
 521 static bool
 522 init_pipe_state(struct vl_mpeg12_context *ctx)
 523 {
 524    struct pipe_rasterizer_state rast;
 525    struct pipe_blend_state blend;
 526    struct pipe_depth_stencil_alpha_state dsa;
 527    unsigned i;
 528
 529    assert(ctx);
 530
 531    memset(&rast, 0, sizeof rast);
 532    rast.flatshade = 1;
 533    rast.flatshade_first = 0;
 534    rast.light_twoside = 0;
 535    rast.front_ccw = 1;
 536    rast.cull_face = PIPE_FACE_NONE;
 537    rast.fill_back = PIPE_POLYGON_MODE_FILL;
 538    rast.fill_front = PIPE_POLYGON_MODE_FILL;
 539    rast.offset_point = 0;
 540    rast.offset_line = 0;
 541    rast.scissor = 0;
 542    rast.poly_smooth = 0;
 543    rast.poly_stipple_enable = 0;
 544    rast.sprite_coord_enable = 0;
 545    rast.point_size_per_vertex = 0;
 546    rast.multisample = 0;
 547    rast.line_smooth = 0;
 548    rast.line_stipple_enable = 0;
 549    rast.line_stipple_factor = 0;
 550    rast.line_stipple_pattern = 0;
 551    rast.line_last_pixel = 0;
 552    rast.line_width = 1;
 553    rast.point_smooth = 0;
 554    rast.point_quad_rasterization = 0;
 555    rast.point_size_per_vertex = 1;
 556    rast.offset_units = 1;
 557    rast.offset_scale = 1;
 558    rast.gl_rasterization_rules = 1;
 559
 560    ctx->rast = ctx->pipe->create_rasterizer_state(ctx->pipe, &rast);
 561    ctx->pipe->bind_rasterizer_state(ctx->pipe, ctx->rast);
 562
 563    memset(&blend, 0, sizeof blend);
 564
 565    blend.independent_blend_enable = 0;
 566    blend.rt[0].blend_enable = 0;
 567    blend.rt[0].rgb_func = PIPE_BLEND_ADD;
 568    blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 569    blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ONE;
 570    blend.rt[0].alpha_func = PIPE_BLEND_ADD;
 571    blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 572    blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ONE;
 573    blend.logicop_enable = 0;
 574    blend.logicop_func = PIPE_LOGICOP_CLEAR;
 575    /* Needed to allow color writes to FB, even if blending disabled */
 576    blend.rt[0].colormask = PIPE_MASK_RGBA;
 577    blend.dither = 0;
 578    ctx->blend = ctx->pipe->create_blend_state(ctx->pipe, &blend);
 579    ctx->pipe->bind_blend_state(ctx->pipe, ctx->blend);
 580
 581    memset(&dsa, 0, sizeof dsa);
 582    dsa.depth.enabled = 0;
 583    dsa.depth.writemask = 0;
 584    dsa.depth.func = PIPE_FUNC_ALWAYS;
 585    for (i = 0; i < 2; ++i) {
 586       dsa.stencil[i].enabled = 0;
 587       dsa.stencil[i].func = PIPE_FUNC_ALWAYS;
 588       dsa.stencil[i].fail_op = PIPE_STENCIL_OP_KEEP;
 589       dsa.stencil[i].zpass_op = PIPE_STENCIL_OP_KEEP;
 590       dsa.stencil[i].zfail_op = PIPE_STENCIL_OP_KEEP;
 591       dsa.stencil[i].valuemask = 0;
 592       dsa.stencil[i].writemask = 0;
 593    }
 594    dsa.alpha.enabled = 0;
 595    dsa.alpha.func = PIPE_FUNC_ALWAYS;
 596    dsa.alpha.ref_value = 0;
 597    ctx->dsa = ctx->pipe->create_depth_stencil_alpha_state(ctx->pipe, &dsa);
 598    ctx->pipe->bind_depth_stencil_alpha_state(ctx->pipe, ctx->dsa);
 599
 600    return true;
 601 }
 602
 603 struct pipe_video_context *
 604 vl_create_mpeg12_context(struct pipe_context *pipe,
 605                          enum pipe_video_profile profile,
 606                          enum pipe_video_chroma_format chroma_format,
 607                          unsigned width, unsigned height,
 608                          bool pot_buffers,
 609                          enum pipe_format decode_format)
 610 {
 611    struct pipe_resource *idct_matrix;
 612    unsigned buffer_width, buffer_height;
 613    unsigned chroma_width, chroma_height, chroma_blocks_x, chroma_blocks_y;
 614    struct vl_mpeg12_context *ctx;
 615
 616    assert(u_reduce_video_profile(profile) == PIPE_VIDEO_CODEC_MPEG12);
 617
 618    ctx = CALLOC_STRUCT(vl_mpeg12_context);
 619
 620    if (!ctx)
 621       return NULL;
 622
 623    /* TODO: Non-pot buffers untested, probably doesn't work without changes to texcoord generation, vert shader, etc */
 624    assert(pot_buffers);
 625
 626    buffer_width = pot_buffers ? util_next_power_of_two(width) : width;
 627    buffer_height = pot_buffers ? util_next_power_of_two(height) : height;
 628
 629    ctx->base.profile = profile;
 630    ctx->base.chroma_format = chroma_format;
 631    ctx->base.width = width;
 632    ctx->base.height = height;
 633
 634    ctx->base.screen = pipe->screen;
 635
 636    ctx->base.destroy = vl_mpeg12_destroy;
 637    ctx->base.get_param = vl_mpeg12_get_param;
 638    ctx->base.is_format_supported = vl_mpeg12_is_format_supported;
 639    ctx->base.create_surface = vl_mpeg12_create_surface;
 640    ctx->base.decode_macroblocks = vl_mpeg12_decode_macroblocks;
 641    ctx->base.render_picture = vl_mpeg12_render_picture;
 642    ctx->base.clear_render_target = vl_mpeg12_clear_render_target;
 643    ctx->base.resource_copy_region = vl_mpeg12_resource_copy_region;
 644    ctx->base.get_transfer = vl_mpeg12_get_transfer;
 645    ctx->base.transfer_destroy = vl_mpeg12_transfer_destroy;
 646    ctx->base.transfer_map = vl_mpeg12_transfer_map;
 647    ctx->base.transfer_flush_region = vl_mpeg12_transfer_flush_region;
 648    ctx->base.transfer_unmap = vl_mpeg12_transfer_unmap;
 649    if (pipe->transfer_inline_write)
 650       ctx->base.transfer_inline_write = vl_mpeg12_transfer_inline_write;
 651    ctx->base.set_picture_background = vl_mpeg12_set_picture_background;
 652    ctx->base.set_picture_layers = vl_mpeg12_set_picture_layers;
 653    ctx->base.set_decode_target = vl_mpeg12_set_decode_target;
 654    ctx->base.set_csc_matrix = vl_mpeg12_set_csc_matrix;
 655
 656    ctx->pipe = pipe;
 657    ctx->decode_format = decode_format;
 658
 659    ctx->quads = vl_vb_upload_quads(ctx->pipe, 2, 2);
 660    ctx->vertex_buffer_size = width / MACROBLOCK_WIDTH * height / MACROBLOCK_HEIGHT;
 661    ctx->vertex_elems_state = vl_vb_get_elems_state(ctx->pipe, true);
 662
 663    if (ctx->vertex_elems_state == NULL) {
 664       ctx->pipe->destroy(ctx->pipe);
 665       FREE(ctx);
 666       return NULL;
 667    }
 668
 669    /* TODO: Implement 422, 444 */
 670    assert(chroma_format == PIPE_VIDEO_CHROMA_FORMAT_420);
 671    ctx->empty_block_mask = &const_empty_block_mask_420;
 672
 673    if (!(idct_matrix = vl_idct_upload_matrix(ctx->pipe)))
 674       return false;
 675
 676    if (!vl_idct_init(&ctx->idct_y, ctx->pipe, buffer_width, buffer_height,
 677                      2, 2, TGSI_SWIZZLE_X, idct_matrix))
 678       return false;
 679
 680    if (chroma_format == PIPE_VIDEO_CHROMA_FORMAT_420) {
 681       chroma_width = buffer_width / 2;
 682       chroma_height = buffer_height / 2;
 683       chroma_blocks_x = 1;
 684       chroma_blocks_y = 1;
 685    } else if (chroma_format == PIPE_VIDEO_CHROMA_FORMAT_422) {
 686       chroma_width = buffer_width;
 687       chroma_height = buffer_height / 2;
 688       chroma_blocks_x = 2;
 689       chroma_blocks_y = 1;
 690    } else {
 691       chroma_width = buffer_width;
 692       chroma_height = buffer_height;
 693       chroma_blocks_x = 2;
 694       chroma_blocks_y = 2;
 695    }
 696
 697    if(!vl_idct_init(&ctx->idct_cr, ctx->pipe, chroma_width, chroma_height,
 698                     chroma_blocks_x, chroma_blocks_y, TGSI_SWIZZLE_Z, idct_matrix))
 699       return false;
 700
 701    if(!vl_idct_init(&ctx->idct_cb, ctx->pipe, chroma_width, chroma_height,
 702                     chroma_blocks_x, chroma_blocks_y, TGSI_SWIZZLE_Y, idct_matrix))
 703       return false;
 704
 705    if (!vl_mpeg12_mc_renderer_init(&ctx->mc_renderer, ctx->pipe,
 706                                    buffer_width, buffer_height, chroma_format)) {
 707       ctx->pipe->destroy(ctx->pipe);
 708       FREE(ctx);
 709       return NULL;
 710    }
 711
 712    ctx->buffer_map = util_new_keymap(sizeof(unsigned), -1, delete_buffer);
 713    if (!ctx->buffer_map) {
 714       vl_mpeg12_mc_renderer_cleanup(&ctx->mc_renderer);
 715       ctx->pipe->destroy(ctx->pipe);
 716       FREE(ctx);
 717       return NULL;
 718    }
 719
 720    if (!vl_compositor_init(&ctx->compositor, ctx->pipe)) {
 721       util_delete_keymap(ctx->buffer_map, ctx);
 722       vl_mpeg12_mc_renderer_cleanup(&ctx->mc_renderer);
 723       ctx->pipe->destroy(ctx->pipe);
 724       FREE(ctx);
 725       return NULL;
 726    }
 727
 728    if (!init_pipe_state(ctx)) {
 729       vl_compositor_cleanup(&ctx->compositor);
 730       util_delete_keymap(ctx->buffer_map, ctx);
 731       vl_mpeg12_mc_renderer_cleanup(&ctx->mc_renderer);
 732       ctx->pipe->destroy(ctx->pipe);
 733       FREE(ctx);
 734       return NULL;
 735    }
 736
 737    return &ctx->base;
 738 }