src/gallium/auxiliary/vl/vl_deint_filter.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2013 Grigori Goronzy <greg@chown.ath.cx>.
   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 /*
  29  *  References:
  30  *
  31  *  Lin, S. F., Chang, Y. L., & Chen, L. G. (2003).
  32  *  Motion adaptive interpolation with horizontal motion detection for deinterlacing.
  33  *  Consumer Electronics, IEEE Transactions on, 49(4), 1256-1265.
  34  *
  35  *  Pei-Yin, C. H. E. N., & Yao-Hsien, L. A. I. (2007).
  36  *  A low-complexity interpolation method for deinterlacing.
  37  *  IEICE transactions on information and systems, 90(2), 606-608.
  38  *
  39  */
  40
  41 #include <stdio.h>
  42
  43 #include "pipe/p_context.h"
  44
  45 #include "tgsi/tgsi_ureg.h"
  46
  47 #include "util/u_draw.h"
  48 #include "util/u_memory.h"
  49 #include "util/u_math.h"
  50 #include "util/u_format.h"
  51
  52 #include "vl_types.h"
  53 #include "vl_video_buffer.h"
  54 #include "vl_vertex_buffers.h"
  55 #include "vl_deint_filter.h"
  56
  57 enum VS_OUTPUT
  58 {
  59    VS_O_VPOS = 0,
  60    VS_O_VTEX = 0
  61 };
  62
  63 static void *
  64 create_vert_shader(struct vl_deint_filter *filter)
  65 {
  66    struct ureg_program *shader;
  67    struct ureg_src i_vpos;
  68    struct ureg_dst o_vpos, o_vtex;
  69
  70    shader = ureg_create(TGSI_PROCESSOR_VERTEX);
  71    if (!shader)
  72       return NULL;
  73
  74    i_vpos = ureg_DECL_vs_input(shader, 0);
  75    o_vpos = ureg_DECL_output(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS);
  76    o_vtex = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX);
  77
  78    ureg_MOV(shader, o_vpos, i_vpos);
  79    ureg_MOV(shader, o_vtex, i_vpos);
  80
  81    ureg_END(shader);
  82
  83    return ureg_create_shader_and_destroy(shader, filter->pipe);
  84 }
  85
  86 static void *
  87 create_copy_frag_shader(struct vl_deint_filter *filter, unsigned field)
  88 {
  89    struct ureg_program *shader;
  90    struct ureg_src i_vtex;
  91    struct ureg_src sampler;
  92    struct ureg_dst o_fragment;
  93    struct ureg_dst t_tex;
  94
  95    shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
  96    if (!shader) {
  97       return NULL;
  98    }
  99    t_tex = ureg_DECL_temporary(shader);
 100
 101    i_vtex = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX, TGSI_INTERPOLATE_LINEAR);
 102    sampler = ureg_DECL_sampler(shader, 2);
 103    o_fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 104
 105    ureg_MOV(shader, t_tex, i_vtex);
 106    if (field) {
 107       ureg_MOV(shader, ureg_writemask(t_tex, TGSI_WRITEMASK_ZW),
 108                ureg_imm4f(shader, 0, 0, 1.0f, 0));
 109    } else {
 110       ureg_MOV(shader, ureg_writemask(t_tex, TGSI_WRITEMASK_ZW),
 111                ureg_imm1f(shader, 0));
 112    }
 113
 114    ureg_TEX(shader, o_fragment, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_tex), sampler);
 115
 116    ureg_release_temporary(shader, t_tex);
 117    ureg_END(shader);
 118
 119    return ureg_create_shader_and_destroy(shader, filter->pipe);
 120 }
 121
 122 static void *
 123 create_deint_frag_shader(struct vl_deint_filter *filter, unsigned field,
 124                          struct vertex2f *sizes, bool spatial_filter)
 125 {
 126    struct ureg_program *shader;
 127    struct ureg_src i_vtex;
 128    struct ureg_src sampler_cur;
 129    struct ureg_src sampler_prevprev;
 130    struct ureg_src sampler_prev;
 131    struct ureg_src sampler_next;
 132    struct ureg_dst o_fragment;
 133    struct ureg_dst t_tex;
 134    struct ureg_dst t_comp_top, t_comp_bot;
 135    struct ureg_dst t_diff;
 136    struct ureg_dst t_a, t_b;
 137    struct ureg_dst t_weave, t_linear;
 138
 139    shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
 140    if (!shader) {
 141       return NULL;
 142    }
 143
 144    t_tex = ureg_DECL_temporary(shader);
 145    t_comp_top = ureg_DECL_temporary(shader);
 146    t_comp_bot = ureg_DECL_temporary(shader);
 147    t_diff = ureg_DECL_temporary(shader);
 148    t_a = ureg_DECL_temporary(shader);
 149    t_b = ureg_DECL_temporary(shader);
 150    t_weave = ureg_DECL_temporary(shader);
 151    t_linear = ureg_DECL_temporary(shader);
 152
 153    i_vtex = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX, TGSI_INTERPOLATE_LINEAR);
 154    sampler_prevprev = ureg_DECL_sampler(shader, 0);
 155    sampler_prev = ureg_DECL_sampler(shader, 1);
 156    sampler_cur = ureg_DECL_sampler(shader, 2);
 157    sampler_next = ureg_DECL_sampler(shader, 3);
 158    o_fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 159
 160    // we don't care about ZW interpolation (allows better optimization)
 161    ureg_MOV(shader, t_tex, i_vtex);
 162    ureg_MOV(shader, ureg_writemask(t_tex, TGSI_WRITEMASK_ZW),
 163             ureg_imm1f(shader, 0));
 164
 165    // sample between texels for cheap lowpass
 166    ureg_ADD(shader, t_comp_top, ureg_src(t_tex),
 167             ureg_imm4f(shader, sizes->x * 0.5f, sizes->y * -0.5f, 0, 0));
 168    ureg_ADD(shader, t_comp_bot, ureg_src(t_tex),
 169             ureg_imm4f(shader, sizes->x * -0.5f, sizes->y * 0.5f, 1.0f, 0));
 170
 171    if (field == 0) {
 172       /* interpolating top field -> current field is a bottom field */
 173       // cur vs prev2
 174       ureg_TEX(shader, t_a, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_bot), sampler_cur);
 175       ureg_TEX(shader, t_b, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_bot), sampler_prevprev);
 176       ureg_SUB(shader, ureg_writemask(t_diff, TGSI_WRITEMASK_X), ureg_src(t_a), ureg_src(t_b));
 177       // prev vs next
 178       ureg_TEX(shader, t_a, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_top), sampler_prev);
 179       ureg_TEX(shader, t_b, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_top), sampler_next);
 180       ureg_SUB(shader, ureg_writemask(t_diff, TGSI_WRITEMASK_Y), ureg_src(t_a), ureg_src(t_b));
 181    } else {
 182       /* interpolating bottom field -> current field is a top field */
 183       // cur vs prev2
 184       ureg_TEX(shader, t_a, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_top), sampler_cur);
 185       ureg_TEX(shader, t_b, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_top), sampler_prevprev);
 186       ureg_SUB(shader, ureg_writemask(t_diff, TGSI_WRITEMASK_X), ureg_src(t_a), ureg_src(t_b));
 187       // prev vs next
 188       ureg_TEX(shader, t_a, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_bot), sampler_prev);
 189       ureg_TEX(shader, t_b, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_bot), sampler_next);
 190       ureg_SUB(shader, ureg_writemask(t_diff, TGSI_WRITEMASK_Y), ureg_src(t_a), ureg_src(t_b));
 191    }
 192
 193    // absolute maximum of differences
 194    ureg_MAX(shader, ureg_writemask(t_diff, TGSI_WRITEMASK_X), ureg_abs(ureg_src(t_diff)),
 195             ureg_scalar(ureg_abs(ureg_src(t_diff)), TGSI_SWIZZLE_Y));
 196
 197    if (field == 0) {
 198       /* weave with prev top field */
 199       ureg_TEX(shader, t_weave, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_tex), sampler_prev);
 200       /* get linear interpolation from current bottom field */
 201       ureg_ADD(shader, t_comp_top, ureg_src(t_tex), ureg_imm4f(shader, 0, sizes->y * -1.0f, 1.0f, 0));
 202       ureg_TEX(shader, t_linear, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_top), sampler_cur);
 203    } else {
 204       /* weave with prev bottom field */
 205       ureg_ADD(shader, t_comp_bot, ureg_src(t_tex), ureg_imm4f(shader, 0, 0, 1.0f, 0));
 206       ureg_TEX(shader, t_weave, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_bot), sampler_prev);
 207       /* get linear interpolation from current top field */
 208       ureg_ADD(shader, t_comp_bot, ureg_src(t_tex), ureg_imm4f(shader, 0, sizes->y * 1.0f, 0, 0));
 209       ureg_TEX(shader, t_linear, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_bot), sampler_cur);
 210    }
 211
 212    // mix between weave and linear
 213    // fully weave if diff < 6 (0.02353), fully interpolate if diff > 14 (0.05490)
 214    ureg_ADD(shader, ureg_writemask(t_diff, TGSI_WRITEMASK_X), ureg_src(t_diff),
 215             ureg_imm4f(shader, -0.02353f, 0, 0, 0));
 216    ureg_MUL(shader, ureg_saturate(ureg_writemask(t_diff, TGSI_WRITEMASK_X)),
 217             ureg_src(t_diff), ureg_imm4f(shader, 31.8750f, 0, 0, 0));
 218    ureg_LRP(shader, ureg_writemask(t_tex, TGSI_WRITEMASK_X), ureg_src(t_diff),
 219             ureg_src(t_linear), ureg_src(t_weave));
 220    ureg_MOV(shader, o_fragment, ureg_scalar(ureg_src(t_tex), TGSI_SWIZZLE_X));
 221
 222    ureg_release_temporary(shader, t_tex);
 223    ureg_release_temporary(shader, t_comp_top);
 224    ureg_release_temporary(shader, t_comp_bot);
 225    ureg_release_temporary(shader, t_diff);
 226    ureg_release_temporary(shader, t_a);
 227    ureg_release_temporary(shader, t_b);
 228    ureg_release_temporary(shader, t_weave);
 229    ureg_release_temporary(shader, t_linear);
 230    ureg_END(shader);
 231
 232    return ureg_create_shader_and_destroy(shader, filter->pipe);
 233 }
 234
 235 bool
 236 vl_deint_filter_init(struct vl_deint_filter *filter, struct pipe_context *pipe,
 237                      unsigned video_width, unsigned video_height,
 238                      bool skip_chroma, bool spatial_filter)
 239 {
 240    struct pipe_rasterizer_state rs_state;
 241    struct pipe_blend_state blend;
 242    struct pipe_sampler_state sampler;
 243    struct pipe_vertex_element ve;
 244    struct vertex2f sizes;
 245    struct pipe_video_buffer templ;
 246
 247    assert(filter && pipe);
 248    assert(video_width && video_height);
 249
 250    memset(filter, 0, sizeof(*filter));
 251    filter->pipe = pipe;
 252    filter->skip_chroma = skip_chroma;
 253    filter->video_width = video_width;
 254    filter->video_height = video_height;
 255
 256    /* TODO: handle other than 4:2:0 subsampling */
 257    memset(&templ, 0, sizeof(templ));
 258    templ.buffer_format = PIPE_FORMAT_YV12;
 259    templ.chroma_format = PIPE_VIDEO_CHROMA_FORMAT_420;
 260    templ.width = video_width;
 261    templ.height = video_height;
 262    templ.interlaced = true;
 263    filter->video_buffer = vl_video_buffer_create(pipe, &templ);
 264    if (!filter->video_buffer)
 265       goto error_video_buffer;
 266
 267    memset(&rs_state, 0, sizeof(rs_state));
 268    rs_state.half_pixel_center = true;
 269    rs_state.bottom_edge_rule = true;
 270    rs_state.depth_clip = 1;
 271    filter->rs_state = pipe->create_rasterizer_state(pipe, &rs_state);
 272    if (!filter->rs_state)
 273       goto error_rs_state;
 274
 275    memset(&blend, 0, sizeof blend);
 276    blend.rt[0].colormask = PIPE_MASK_R;
 277    filter->blend[0] = pipe->create_blend_state(pipe, &blend);
 278    if (!filter->blend[0])
 279       goto error_blendR;
 280
 281    blend.rt[0].colormask = PIPE_MASK_G;
 282    filter->blend[1] = pipe->create_blend_state(pipe, &blend);
 283    if (!filter->blend[1])
 284       goto error_blendG;
 285
 286    blend.rt[0].colormask = PIPE_MASK_B;
 287    filter->blend[2] = pipe->create_blend_state(pipe, &blend);
 288    if (!filter->blend[2])
 289       goto error_blendB;
 290
 291    memset(&sampler, 0, sizeof(sampler));
 292    sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 293    sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 294    sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 295    sampler.min_img_filter = PIPE_TEX_FILTER_LINEAR;
 296    sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 297    sampler.mag_img_filter = PIPE_TEX_FILTER_LINEAR;
 298    sampler.normalized_coords = 1;
 299    filter->sampler[0] = pipe->create_sampler_state(pipe, &sampler);
 300    filter->sampler[1] = filter->sampler[2] = filter->sampler[3] = filter->sampler[0];
 301    if (!filter->sampler[0])
 302       goto error_sampler;
 303
 304    filter->quad = vl_vb_upload_quads(pipe);
 305    if(!filter->quad.buffer)
 306       goto error_quad;
 307
 308    memset(&ve, 0, sizeof(ve));
 309    ve.src_offset = 0;
 310    ve.instance_divisor = 0;
 311    ve.vertex_buffer_index = 0;
 312    ve.src_format = PIPE_FORMAT_R32G32_FLOAT;
 313    filter->ves = pipe->create_vertex_elements_state(pipe, 1, &ve);
 314    if (!filter->ves)
 315       goto error_ves;
 316
 317    sizes.x = 1.0f / video_width;
 318    sizes.y = 1.0f / video_height;
 319
 320    filter->vs = create_vert_shader(filter);
 321    if (!filter->vs)
 322       goto error_vs;
 323
 324    filter->fs_copy_top = create_copy_frag_shader(filter, 0);
 325    if (!filter->fs_copy_top)
 326       goto error_fs_copy_top;
 327
 328    filter->fs_copy_bottom = create_copy_frag_shader(filter, 1);
 329    if (!filter->fs_copy_bottom)
 330       goto error_fs_copy_bottom;
 331
 332    filter->fs_deint_top = create_deint_frag_shader(filter, 0, &sizes, spatial_filter);
 333    if (!filter->fs_deint_top)
 334       goto error_fs_deint_top;
 335
 336    filter->fs_deint_bottom = create_deint_frag_shader(filter, 1, &sizes, spatial_filter);
 337    if (!filter->fs_deint_bottom)
 338       goto error_fs_deint_bottom;
 339
 340    return true;
 341
 342 error_fs_deint_bottom:
 343    pipe->delete_fs_state(pipe, filter->fs_deint_top);
 344
 345 error_fs_deint_top:
 346    pipe->delete_fs_state(pipe, filter->fs_copy_bottom);
 347
 348 error_fs_copy_bottom:
 349    pipe->delete_fs_state(pipe, filter->fs_copy_top);
 350
 351 error_fs_copy_top:
 352    pipe->delete_vs_state(pipe, filter->vs);
 353
 354 error_vs:
 355    pipe->delete_vertex_elements_state(pipe, filter->ves);
 356
 357 error_ves:
 358    pipe_resource_reference(&filter->quad.buffer, NULL);
 359
 360 error_quad:
 361    pipe->delete_sampler_state(pipe, filter->sampler);
 362
 363 error_sampler:
 364    pipe->delete_blend_state(pipe, filter->blend[2]);
 365
 366 error_blendB:
 367    pipe->delete_blend_state(pipe, filter->blend[1]);
 368
 369 error_blendG:
 370    pipe->delete_blend_state(pipe, filter->blend[0]);
 371
 372 error_blendR:
 373    pipe->delete_rasterizer_state(pipe, filter->rs_state);
 374
 375 error_rs_state:
 376    filter->video_buffer->destroy(filter->video_buffer);
 377
 378 error_video_buffer:
 379    return false;
 380 }
 381
 382 void
 383 vl_deint_filter_cleanup(struct vl_deint_filter *filter)
 384 {
 385    assert(filter);
 386
 387    filter->pipe->delete_sampler_state(filter->pipe, filter->sampler[0]);
 388    filter->pipe->delete_blend_state(filter->pipe, filter->blend[0]);
 389    filter->pipe->delete_blend_state(filter->pipe, filter->blend[1]);
 390    filter->pipe->delete_blend_state(filter->pipe, filter->blend[2]);
 391    filter->pipe->delete_rasterizer_state(filter->pipe, filter->rs_state);
 392    filter->pipe->delete_vertex_elements_state(filter->pipe, filter->ves);
 393    pipe_resource_reference(&filter->quad.buffer, NULL);
 394
 395    filter->pipe->delete_vs_state(filter->pipe, filter->vs);
 396    filter->pipe->delete_fs_state(filter->pipe, filter->fs_copy_top);
 397    filter->pipe->delete_fs_state(filter->pipe, filter->fs_copy_bottom);
 398    filter->pipe->delete_fs_state(filter->pipe, filter->fs_deint_top);
 399    filter->pipe->delete_fs_state(filter->pipe, filter->fs_deint_bottom);
 400
 401    filter->video_buffer->destroy(filter->video_buffer);
 402 }
 403
 404 bool
 405 vl_deint_filter_check_buffers(struct vl_deint_filter *filter,
 406                               struct pipe_video_buffer *prevprev,
 407                               struct pipe_video_buffer *prev,
 408                               struct pipe_video_buffer *cur,
 409                               struct pipe_video_buffer *next)
 410 {
 411    int i;
 412    struct pipe_video_buffer *bufs[] = { prevprev, prev, cur, next };
 413
 414    for (i = 0; i < 4; i++) {
 415       if (bufs[i]->chroma_format != PIPE_VIDEO_CHROMA_FORMAT_420)
 416          return false;
 417       if (bufs[i]->width < filter->video_width ||
 418           bufs[i]->height < filter->video_height)
 419          return false;
 420       if (!bufs[i]->interlaced)
 421          return false;
 422    }
 423
 424    return true;
 425 }
 426
 427 void
 428 vl_deint_filter_render(struct vl_deint_filter *filter,
 429                        struct pipe_video_buffer *prevprev,
 430                        struct pipe_video_buffer *prev,
 431                        struct pipe_video_buffer *cur,
 432                        struct pipe_video_buffer *next,
 433                        unsigned field)
 434 {
 435    struct pipe_viewport_state viewport;
 436    struct pipe_framebuffer_state fb_state;
 437    struct pipe_sampler_view **cur_sv;
 438    struct pipe_sampler_view **prevprev_sv;
 439    struct pipe_sampler_view **prev_sv;
 440    struct pipe_sampler_view **next_sv;
 441    struct pipe_sampler_view *sampler_views[4];
 442    struct pipe_surface **dst_surfaces;
 443    const unsigned *plane_order;
 444    int i, j;
 445
 446    assert(filter && prevprev && prev && cur && next && field <= 1);
 447
 448    /* set up destination and source */
 449    dst_surfaces = filter->video_buffer->get_surfaces(filter->video_buffer);
 450    plane_order = vl_video_buffer_plane_order(filter->video_buffer->buffer_format);
 451    cur_sv = cur->get_sampler_view_components(cur);
 452    prevprev_sv = prevprev->get_sampler_view_components(prevprev);
 453    prev_sv = prev->get_sampler_view_components(prev);
 454    next_sv = next->get_sampler_view_components(next);
 455
 456    /* set up pipe state */
 457    filter->pipe->bind_rasterizer_state(filter->pipe, filter->rs_state);
 458    filter->pipe->set_vertex_buffers(filter->pipe, 0, 1, &filter->quad);
 459    filter->pipe->bind_vertex_elements_state(filter->pipe, filter->ves);
 460    filter->pipe->bind_vs_state(filter->pipe, filter->vs);
 461    filter->pipe->bind_sampler_states(filter->pipe, PIPE_SHADER_FRAGMENT,
 462                                      0, 4, filter->sampler);
 463
 464    /* prepare viewport */
 465    memset(&viewport, 0, sizeof(viewport));
 466    viewport.scale[2] = 1;
 467
 468    /* prepare framebuffer */
 469    memset(&fb_state, 0, sizeof(fb_state));
 470    fb_state.nr_cbufs = 1;
 471
 472    /* process each plane separately */
 473    for (i = 0, j = 0; i < VL_NUM_COMPONENTS; ++i) {
 474       struct pipe_surface *blit_surf = dst_surfaces[field];
 475       struct pipe_surface *dst_surf = dst_surfaces[1 - field];
 476       int k = plane_order[i];
 477
 478       /* bind blend state for this component in the plane */
 479       filter->pipe->bind_blend_state(filter->pipe, filter->blend[j]);
 480
 481       /* update render target state */
 482       viewport.scale[0] = blit_surf->texture->width0;
 483       viewport.scale[1] = blit_surf->texture->height0;
 484       fb_state.width = blit_surf->texture->width0;
 485       fb_state.height = blit_surf->texture->height0;
 486
 487       /* update sampler view sources  */
 488       sampler_views[0] = prevprev_sv[k];
 489       sampler_views[1] = prev_sv[k];
 490       sampler_views[2] = cur_sv[k];
 491       sampler_views[3] = next_sv[k];
 492       filter->pipe->set_sampler_views(filter->pipe, PIPE_SHADER_FRAGMENT, 0, 4, sampler_views);
 493
 494       /* blit current field */
 495       fb_state.cbufs[0] = blit_surf;
 496       filter->pipe->bind_fs_state(filter->pipe, field ? filter->fs_copy_bottom : filter->fs_copy_top);
 497       filter->pipe->set_framebuffer_state(filter->pipe, &fb_state);
 498       filter->pipe->set_viewport_states(filter->pipe, 0, 1, &viewport);
 499       util_draw_arrays(filter->pipe, PIPE_PRIM_QUADS, 0, 4);
 500
 501       /* blit or interpolate other field */
 502       fb_state.cbufs[0] = dst_surf;
 503       filter->pipe->set_framebuffer_state(filter->pipe, &fb_state);
 504       if (i > 0 && filter->skip_chroma) {
 505          util_draw_arrays(filter->pipe, PIPE_PRIM_QUADS, 0, 4);
 506       } else {
 507          filter->pipe->bind_fs_state(filter->pipe, field ? filter->fs_deint_top : filter->fs_deint_bottom);
 508          util_draw_arrays(filter->pipe, PIPE_PRIM_QUADS, 0, 4);
 509       }
 510
 511       if (++j >= util_format_get_nr_components(dst_surf->format)) {
 512          dst_surfaces += 2;
 513          j = 0;
 514       }
 515    }
 516 }