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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 *
create_vert_shader(struct vl_deint_filter * filter)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(PIPE_SHADER_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 *
create_copy_frag_shader(struct vl_deint_filter * filter,unsigned field)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(PIPE_SHADER_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 *
create_deint_frag_shader(struct vl_deint_filter * filter,unsigned field,struct vertex2f * sizes,bool spatial_filter)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(PIPE_SHADER_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_ADD(shader, ureg_writemask(t_diff, TGSI_WRITEMASK_X), ureg_src(t_a), ureg_negate(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_ADD(shader, ureg_writemask(t_diff, TGSI_WRITEMASK_Y), ureg_src(t_a), ureg_negate(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_ADD(shader, ureg_writemask(t_diff, TGSI_WRITEMASK_X), ureg_src(t_a), ureg_negate(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_ADD(shader, ureg_writemask(t_diff, TGSI_WRITEMASK_Y), ureg_src(t_a), ureg_negate(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
vl_deint_filter_init(struct vl_deint_filter * filter,struct pipe_context * pipe,unsigned video_width,unsigned video_height,bool skip_chroma,bool spatial_filter)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->screen->get_video_param
259    (
260       pipe->screen,
261       PIPE_VIDEO_PROFILE_UNKNOWN,
262       PIPE_VIDEO_ENTRYPOINT_UNKNOWN,
263       PIPE_VIDEO_CAP_PREFERED_FORMAT
264    );
265    templ.chroma_format = PIPE_VIDEO_CHROMA_FORMAT_420;
266    templ.width = video_width;
267    templ.height = video_height;
268    templ.interlaced = true;
269    filter->video_buffer = vl_video_buffer_create(pipe, &templ);
270    if (!filter->video_buffer)
271       goto error_video_buffer;
272 
273    memset(&rs_state, 0, sizeof(rs_state));
274    rs_state.half_pixel_center = true;
275    rs_state.bottom_edge_rule = true;
276    rs_state.depth_clip = 1;
277    filter->rs_state = pipe->create_rasterizer_state(pipe, &rs_state);
278    if (!filter->rs_state)
279       goto error_rs_state;
280 
281    memset(&blend, 0, sizeof blend);
282    blend.rt[0].colormask = PIPE_MASK_R;
283    filter->blend[0] = pipe->create_blend_state(pipe, &blend);
284    if (!filter->blend[0])
285       goto error_blendR;
286 
287    blend.rt[0].colormask = PIPE_MASK_G;
288    filter->blend[1] = pipe->create_blend_state(pipe, &blend);
289    if (!filter->blend[1])
290       goto error_blendG;
291 
292    blend.rt[0].colormask = PIPE_MASK_B;
293    filter->blend[2] = pipe->create_blend_state(pipe, &blend);
294    if (!filter->blend[2])
295       goto error_blendB;
296 
297    memset(&sampler, 0, sizeof(sampler));
298    sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
299    sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
300    sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
301    sampler.min_img_filter = PIPE_TEX_FILTER_LINEAR;
302    sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
303    sampler.mag_img_filter = PIPE_TEX_FILTER_LINEAR;
304    sampler.normalized_coords = 1;
305    filter->sampler[0] = pipe->create_sampler_state(pipe, &sampler);
306    filter->sampler[1] = filter->sampler[2] = filter->sampler[3] = filter->sampler[0];
307    if (!filter->sampler[0])
308       goto error_sampler;
309 
310    filter->quad = vl_vb_upload_quads(pipe);
311    if(!filter->quad.buffer.resource)
312       goto error_quad;
313 
314    memset(&ve, 0, sizeof(ve));
315    ve.src_offset = 0;
316    ve.instance_divisor = 0;
317    ve.vertex_buffer_index = 0;
318    ve.src_format = PIPE_FORMAT_R32G32_FLOAT;
319    filter->ves = pipe->create_vertex_elements_state(pipe, 1, &ve);
320    if (!filter->ves)
321       goto error_ves;
322 
323    sizes.x = 1.0f / video_width;
324    sizes.y = 1.0f / video_height;
325 
326    filter->vs = create_vert_shader(filter);
327    if (!filter->vs)
328       goto error_vs;
329 
330    filter->fs_copy_top = create_copy_frag_shader(filter, 0);
331    if (!filter->fs_copy_top)
332       goto error_fs_copy_top;
333 
334    filter->fs_copy_bottom = create_copy_frag_shader(filter, 1);
335    if (!filter->fs_copy_bottom)
336       goto error_fs_copy_bottom;
337 
338    filter->fs_deint_top = create_deint_frag_shader(filter, 0, &sizes, spatial_filter);
339    if (!filter->fs_deint_top)
340       goto error_fs_deint_top;
341 
342    filter->fs_deint_bottom = create_deint_frag_shader(filter, 1, &sizes, spatial_filter);
343    if (!filter->fs_deint_bottom)
344       goto error_fs_deint_bottom;
345 
346    return true;
347 
348 error_fs_deint_bottom:
349    pipe->delete_fs_state(pipe, filter->fs_deint_top);
350 
351 error_fs_deint_top:
352    pipe->delete_fs_state(pipe, filter->fs_copy_bottom);
353 
354 error_fs_copy_bottom:
355    pipe->delete_fs_state(pipe, filter->fs_copy_top);
356 
357 error_fs_copy_top:
358    pipe->delete_vs_state(pipe, filter->vs);
359 
360 error_vs:
361    pipe->delete_vertex_elements_state(pipe, filter->ves);
362 
363 error_ves:
364    pipe_resource_reference(&filter->quad.buffer.resource, NULL);
365 
366 error_quad:
367    pipe->delete_sampler_state(pipe, filter->sampler);
368 
369 error_sampler:
370    pipe->delete_blend_state(pipe, filter->blend[2]);
371 
372 error_blendB:
373    pipe->delete_blend_state(pipe, filter->blend[1]);
374 
375 error_blendG:
376    pipe->delete_blend_state(pipe, filter->blend[0]);
377 
378 error_blendR:
379    pipe->delete_rasterizer_state(pipe, filter->rs_state);
380 
381 error_rs_state:
382    filter->video_buffer->destroy(filter->video_buffer);
383 
384 error_video_buffer:
385    return false;
386 }
387 
388 void
vl_deint_filter_cleanup(struct vl_deint_filter * filter)389 vl_deint_filter_cleanup(struct vl_deint_filter *filter)
390 {
391    assert(filter);
392 
393    filter->pipe->delete_sampler_state(filter->pipe, filter->sampler[0]);
394    filter->pipe->delete_blend_state(filter->pipe, filter->blend[0]);
395    filter->pipe->delete_blend_state(filter->pipe, filter->blend[1]);
396    filter->pipe->delete_blend_state(filter->pipe, filter->blend[2]);
397    filter->pipe->delete_rasterizer_state(filter->pipe, filter->rs_state);
398    filter->pipe->delete_vertex_elements_state(filter->pipe, filter->ves);
399    pipe_resource_reference(&filter->quad.buffer.resource, NULL);
400 
401    filter->pipe->delete_vs_state(filter->pipe, filter->vs);
402    filter->pipe->delete_fs_state(filter->pipe, filter->fs_copy_top);
403    filter->pipe->delete_fs_state(filter->pipe, filter->fs_copy_bottom);
404    filter->pipe->delete_fs_state(filter->pipe, filter->fs_deint_top);
405    filter->pipe->delete_fs_state(filter->pipe, filter->fs_deint_bottom);
406 
407    filter->video_buffer->destroy(filter->video_buffer);
408 }
409 
410 bool
vl_deint_filter_check_buffers(struct vl_deint_filter * filter,struct pipe_video_buffer * prevprev,struct pipe_video_buffer * prev,struct pipe_video_buffer * cur,struct pipe_video_buffer * next)411 vl_deint_filter_check_buffers(struct vl_deint_filter *filter,
412                               struct pipe_video_buffer *prevprev,
413                               struct pipe_video_buffer *prev,
414                               struct pipe_video_buffer *cur,
415                               struct pipe_video_buffer *next)
416 {
417    int i;
418    struct pipe_video_buffer *bufs[] = { prevprev, prev, cur, next };
419 
420    for (i = 0; i < 4; i++) {
421       if (bufs[i]->chroma_format != PIPE_VIDEO_CHROMA_FORMAT_420)
422          return false;
423       if (bufs[i]->width < filter->video_width ||
424           bufs[i]->height < filter->video_height)
425          return false;
426       if (!bufs[i]->interlaced)
427          return false;
428    }
429 
430    return true;
431 }
432 
433 void
vl_deint_filter_render(struct vl_deint_filter * filter,struct pipe_video_buffer * prevprev,struct pipe_video_buffer * prev,struct pipe_video_buffer * cur,struct pipe_video_buffer * next,unsigned field)434 vl_deint_filter_render(struct vl_deint_filter *filter,
435                        struct pipe_video_buffer *prevprev,
436                        struct pipe_video_buffer *prev,
437                        struct pipe_video_buffer *cur,
438                        struct pipe_video_buffer *next,
439                        unsigned field)
440 {
441    struct pipe_viewport_state viewport;
442    struct pipe_framebuffer_state fb_state;
443    struct pipe_sampler_view **cur_sv;
444    struct pipe_sampler_view **prevprev_sv;
445    struct pipe_sampler_view **prev_sv;
446    struct pipe_sampler_view **next_sv;
447    struct pipe_sampler_view *sampler_views[4];
448    struct pipe_surface **dst_surfaces;
449    const unsigned *plane_order;
450    int i;
451    unsigned j;
452 
453    assert(filter && prevprev && prev && cur && next && field <= 1);
454 
455    /* set up destination and source */
456    dst_surfaces = filter->video_buffer->get_surfaces(filter->video_buffer);
457    plane_order = vl_video_buffer_plane_order(filter->video_buffer->buffer_format);
458    cur_sv = cur->get_sampler_view_components(cur);
459    prevprev_sv = prevprev->get_sampler_view_components(prevprev);
460    prev_sv = prev->get_sampler_view_components(prev);
461    next_sv = next->get_sampler_view_components(next);
462 
463    /* set up pipe state */
464    filter->pipe->bind_rasterizer_state(filter->pipe, filter->rs_state);
465    filter->pipe->set_vertex_buffers(filter->pipe, 0, 1, &filter->quad);
466    filter->pipe->bind_vertex_elements_state(filter->pipe, filter->ves);
467    filter->pipe->bind_vs_state(filter->pipe, filter->vs);
468    filter->pipe->bind_sampler_states(filter->pipe, PIPE_SHADER_FRAGMENT,
469                                      0, 4, filter->sampler);
470 
471    /* prepare viewport */
472    memset(&viewport, 0, sizeof(viewport));
473    viewport.scale[2] = 1;
474 
475    /* prepare framebuffer */
476    memset(&fb_state, 0, sizeof(fb_state));
477    fb_state.nr_cbufs = 1;
478 
479    /* process each plane separately */
480    for (i = 0, j = 0; i < VL_NUM_COMPONENTS; ++i) {
481       struct pipe_surface *blit_surf = dst_surfaces[field];
482       struct pipe_surface *dst_surf = dst_surfaces[1 - field];
483       int k = plane_order[i];
484 
485       /* bind blend state for this component in the plane */
486       filter->pipe->bind_blend_state(filter->pipe, filter->blend[j]);
487 
488       /* update render target state */
489       viewport.scale[0] = blit_surf->texture->width0;
490       viewport.scale[1] = blit_surf->texture->height0;
491       fb_state.width = blit_surf->texture->width0;
492       fb_state.height = blit_surf->texture->height0;
493 
494       /* update sampler view sources  */
495       sampler_views[0] = prevprev_sv[k];
496       sampler_views[1] = prev_sv[k];
497       sampler_views[2] = cur_sv[k];
498       sampler_views[3] = next_sv[k];
499       filter->pipe->set_sampler_views(filter->pipe, PIPE_SHADER_FRAGMENT, 0, 4, sampler_views);
500 
501       /* blit current field */
502       fb_state.cbufs[0] = blit_surf;
503       filter->pipe->bind_fs_state(filter->pipe, field ? filter->fs_copy_bottom : filter->fs_copy_top);
504       filter->pipe->set_framebuffer_state(filter->pipe, &fb_state);
505       filter->pipe->set_viewport_states(filter->pipe, 0, 1, &viewport);
506       util_draw_arrays(filter->pipe, PIPE_PRIM_QUADS, 0, 4);
507 
508       /* blit or interpolate other field */
509       fb_state.cbufs[0] = dst_surf;
510       filter->pipe->set_framebuffer_state(filter->pipe, &fb_state);
511       if (i > 0 && filter->skip_chroma) {
512          util_draw_arrays(filter->pipe, PIPE_PRIM_QUADS, 0, 4);
513       } else {
514          filter->pipe->bind_fs_state(filter->pipe, field ? filter->fs_deint_top : filter->fs_deint_bottom);
515          util_draw_arrays(filter->pipe, PIPE_PRIM_QUADS, 0, 4);
516       }
517 
518       if (++j >= util_format_get_nr_components(dst_surf->format)) {
519          dst_surfaces += 2;
520          j = 0;
521       }
522    }
523 }
524