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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 <math.h>
29  #include <assert.h>
30  
31  #include "util/u_memory.h"
32  #include "util/u_rect.h"
33  #include "util/u_sampler.h"
34  #include "util/u_video.h"
35  
36  #include "vl_mpeg12_decoder.h"
37  #include "vl_defines.h"
38  
39  #define SCALE_FACTOR_SNORM (32768.0f / 256.0f)
40  #define SCALE_FACTOR_SSCALED (1.0f / 256.0f)
41  
42  struct format_config {
43     enum pipe_format zscan_source_format;
44     enum pipe_format idct_source_format;
45     enum pipe_format mc_source_format;
46  
47     float idct_scale;
48     float mc_scale;
49  };
50  
51  static const struct format_config bitstream_format_config[] = {
52  //   { PIPE_FORMAT_R16_SSCALED, PIPE_FORMAT_R16G16B16A16_SSCALED, PIPE_FORMAT_R16G16B16A16_FLOAT, 1.0f, SCALE_FACTOR_SSCALED },
53  //   { PIPE_FORMAT_R16_SSCALED, PIPE_FORMAT_R16G16B16A16_SSCALED, PIPE_FORMAT_R16G16B16A16_SSCALED, 1.0f, SCALE_FACTOR_SSCALED },
54     { PIPE_FORMAT_R16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM, PIPE_FORMAT_R16G16B16A16_FLOAT, 1.0f, SCALE_FACTOR_SNORM },
55     { PIPE_FORMAT_R16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM, 1.0f, SCALE_FACTOR_SNORM }
56  };
57  
58  static const unsigned num_bitstream_format_configs =
59     sizeof(bitstream_format_config) / sizeof(struct format_config);
60  
61  static const struct format_config idct_format_config[] = {
62  //   { PIPE_FORMAT_R16_SSCALED, PIPE_FORMAT_R16G16B16A16_SSCALED, PIPE_FORMAT_R16G16B16A16_FLOAT, 1.0f, SCALE_FACTOR_SSCALED },
63  //   { PIPE_FORMAT_R16_SSCALED, PIPE_FORMAT_R16G16B16A16_SSCALED, PIPE_FORMAT_R16G16B16A16_SSCALED, 1.0f, SCALE_FACTOR_SSCALED },
64     { PIPE_FORMAT_R16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM, PIPE_FORMAT_R16G16B16A16_FLOAT, 1.0f, SCALE_FACTOR_SNORM },
65     { PIPE_FORMAT_R16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM, 1.0f, SCALE_FACTOR_SNORM }
66  };
67  
68  static const unsigned num_idct_format_configs =
69     sizeof(idct_format_config) / sizeof(struct format_config);
70  
71  static const struct format_config mc_format_config[] = {
72     //{ PIPE_FORMAT_R16_SSCALED, PIPE_FORMAT_NONE, PIPE_FORMAT_R16_SSCALED, 0.0f, SCALE_FACTOR_SSCALED },
73     { PIPE_FORMAT_R16_SNORM, PIPE_FORMAT_NONE, PIPE_FORMAT_R16_SNORM, 0.0f, SCALE_FACTOR_SNORM }
74  };
75  
76  static const unsigned num_mc_format_configs =
77     sizeof(mc_format_config) / sizeof(struct format_config);
78  
79  static const unsigned const_empty_block_mask_420[3][2][2] = {
80     { { 0x20, 0x10 },  { 0x08, 0x04 } },
81     { { 0x02, 0x02 },  { 0x02, 0x02 } },
82     { { 0x01, 0x01 },  { 0x01, 0x01 } }
83  };
84  
85  static bool
init_zscan_buffer(struct vl_mpeg12_decoder * dec,struct vl_mpeg12_buffer * buffer)86  init_zscan_buffer(struct vl_mpeg12_decoder *dec, struct vl_mpeg12_buffer *buffer)
87  {
88     struct pipe_resource *res, res_tmpl;
89     struct pipe_sampler_view sv_tmpl;
90     struct pipe_surface **destination;
91  
92     unsigned i;
93  
94     assert(dec && buffer);
95  
96     memset(&res_tmpl, 0, sizeof(res_tmpl));
97     res_tmpl.target = PIPE_TEXTURE_2D;
98     res_tmpl.format = dec->zscan_source_format;
99     res_tmpl.width0 = dec->blocks_per_line * VL_BLOCK_WIDTH * VL_BLOCK_HEIGHT;
100     res_tmpl.height0 = align(dec->num_blocks, dec->blocks_per_line) / dec->blocks_per_line;
101     res_tmpl.depth0 = 1;
102     res_tmpl.array_size = 1;
103     res_tmpl.usage = PIPE_USAGE_STREAM;
104     res_tmpl.bind = PIPE_BIND_SAMPLER_VIEW;
105  
106     res = dec->base.context->screen->resource_create(dec->base.context->screen, &res_tmpl);
107     if (!res)
108        goto error_source;
109  
110  
111     memset(&sv_tmpl, 0, sizeof(sv_tmpl));
112     u_sampler_view_default_template(&sv_tmpl, res, res->format);
113     sv_tmpl.swizzle_r = sv_tmpl.swizzle_g = sv_tmpl.swizzle_b = sv_tmpl.swizzle_a = PIPE_SWIZZLE_RED;
114     buffer->zscan_source = dec->base.context->create_sampler_view(dec->base.context, res, &sv_tmpl);
115     pipe_resource_reference(&res, NULL);
116     if (!buffer->zscan_source)
117        goto error_sampler;
118  
119     if (dec->base.entrypoint <= PIPE_VIDEO_ENTRYPOINT_IDCT)
120        destination = dec->idct_source->get_surfaces(dec->idct_source);
121     else
122        destination = dec->mc_source->get_surfaces(dec->mc_source);
123  
124     if (!destination)
125        goto error_surface;
126  
127     for (i = 0; i < VL_NUM_COMPONENTS; ++i)
128        if (!vl_zscan_init_buffer(i == 0 ? &dec->zscan_y : &dec->zscan_c,
129                                  &buffer->zscan[i], buffer->zscan_source, destination[i]))
130           goto error_plane;
131  
132     return true;
133  
134  error_plane:
135     for (; i > 0; --i)
136        vl_zscan_cleanup_buffer(&buffer->zscan[i - 1]);
137  
138  error_surface:
139  error_sampler:
140     pipe_sampler_view_reference(&buffer->zscan_source, NULL);
141  
142  error_source:
143     return false;
144  }
145  
146  static void
cleanup_zscan_buffer(struct vl_mpeg12_buffer * buffer)147  cleanup_zscan_buffer(struct vl_mpeg12_buffer *buffer)
148  {
149     unsigned i;
150  
151     assert(buffer);
152  
153     for (i = 0; i < VL_NUM_COMPONENTS; ++i)
154        vl_zscan_cleanup_buffer(&buffer->zscan[i]);
155  
156     pipe_sampler_view_reference(&buffer->zscan_source, NULL);
157  }
158  
159  static bool
init_idct_buffer(struct vl_mpeg12_decoder * dec,struct vl_mpeg12_buffer * buffer)160  init_idct_buffer(struct vl_mpeg12_decoder *dec, struct vl_mpeg12_buffer *buffer)
161  {
162     struct pipe_sampler_view **idct_source_sv, **mc_source_sv;
163  
164     unsigned i;
165  
166     assert(dec && buffer);
167  
168     idct_source_sv = dec->idct_source->get_sampler_view_planes(dec->idct_source);
169     if (!idct_source_sv)
170        goto error_source_sv;
171  
172     mc_source_sv = dec->mc_source->get_sampler_view_planes(dec->mc_source);
173     if (!mc_source_sv)
174        goto error_mc_source_sv;
175  
176     for (i = 0; i < 3; ++i)
177        if (!vl_idct_init_buffer(i == 0 ? &dec->idct_y : &dec->idct_c,
178                                 &buffer->idct[i], idct_source_sv[i],
179                                 mc_source_sv[i]))
180           goto error_plane;
181  
182     return true;
183  
184  error_plane:
185     for (; i > 0; --i)
186        vl_idct_cleanup_buffer(&buffer->idct[i - 1]);
187  
188  error_mc_source_sv:
189  error_source_sv:
190     return false;
191  }
192  
193  static void
cleanup_idct_buffer(struct vl_mpeg12_buffer * buf)194  cleanup_idct_buffer(struct vl_mpeg12_buffer *buf)
195  {
196     unsigned i;
197  
198     assert(buf);
199  
200     for (i = 0; i < 3; ++i)
201        vl_idct_cleanup_buffer(&buf->idct[0]);
202  }
203  
204  static bool
init_mc_buffer(struct vl_mpeg12_decoder * dec,struct vl_mpeg12_buffer * buf)205  init_mc_buffer(struct vl_mpeg12_decoder *dec, struct vl_mpeg12_buffer *buf)
206  {
207     assert(dec && buf);
208  
209     if(!vl_mc_init_buffer(&dec->mc_y, &buf->mc[0]))
210        goto error_mc_y;
211  
212     if(!vl_mc_init_buffer(&dec->mc_c, &buf->mc[1]))
213        goto error_mc_cb;
214  
215     if(!vl_mc_init_buffer(&dec->mc_c, &buf->mc[2]))
216        goto error_mc_cr;
217  
218     return true;
219  
220  error_mc_cr:
221     vl_mc_cleanup_buffer(&buf->mc[1]);
222  
223  error_mc_cb:
224     vl_mc_cleanup_buffer(&buf->mc[0]);
225  
226  error_mc_y:
227     return false;
228  }
229  
230  static void
cleanup_mc_buffer(struct vl_mpeg12_buffer * buf)231  cleanup_mc_buffer(struct vl_mpeg12_buffer *buf)
232  {
233     unsigned i;
234  
235     assert(buf);
236  
237     for (i = 0; i < VL_NUM_COMPONENTS; ++i)
238        vl_mc_cleanup_buffer(&buf->mc[i]);
239  }
240  
241  static INLINE void
MacroBlockTypeToPipeWeights(const struct pipe_mpeg12_macroblock * mb,unsigned weights[2])242  MacroBlockTypeToPipeWeights(const struct pipe_mpeg12_macroblock *mb, unsigned weights[2])
243  {
244     assert(mb);
245  
246     switch (mb->macroblock_type & (PIPE_MPEG12_MB_TYPE_MOTION_FORWARD | PIPE_MPEG12_MB_TYPE_MOTION_BACKWARD)) {
247     case PIPE_MPEG12_MB_TYPE_MOTION_FORWARD:
248        weights[0] = PIPE_VIDEO_MV_WEIGHT_MAX;
249        weights[1] = PIPE_VIDEO_MV_WEIGHT_MIN;
250        break;
251  
252     case (PIPE_MPEG12_MB_TYPE_MOTION_FORWARD | PIPE_MPEG12_MB_TYPE_MOTION_BACKWARD):
253        weights[0] = PIPE_VIDEO_MV_WEIGHT_HALF;
254        weights[1] = PIPE_VIDEO_MV_WEIGHT_HALF;
255        break;
256  
257     case PIPE_MPEG12_MB_TYPE_MOTION_BACKWARD:
258        weights[0] = PIPE_VIDEO_MV_WEIGHT_MIN;
259        weights[1] = PIPE_VIDEO_MV_WEIGHT_MAX;
260        break;
261  
262     default:
263        if (mb->macroblock_type & PIPE_MPEG12_MB_TYPE_INTRA) {
264           weights[0] = PIPE_VIDEO_MV_WEIGHT_MIN;
265           weights[1] = PIPE_VIDEO_MV_WEIGHT_MIN;
266        } else {
267           /* no motion vector, but also not intra mb ->
268              just copy the old frame content */
269           weights[0] = PIPE_VIDEO_MV_WEIGHT_MAX;
270           weights[1] = PIPE_VIDEO_MV_WEIGHT_MIN;
271        }
272        break;
273     }
274  }
275  
276  static INLINE struct vl_motionvector
MotionVectorToPipe(const struct pipe_mpeg12_macroblock * mb,unsigned vector,unsigned field_select_mask,unsigned weight)277  MotionVectorToPipe(const struct pipe_mpeg12_macroblock *mb, unsigned vector,
278                     unsigned field_select_mask, unsigned weight)
279  {
280     struct vl_motionvector mv;
281  
282     assert(mb);
283  
284     if (mb->macroblock_type & (PIPE_MPEG12_MB_TYPE_MOTION_FORWARD | PIPE_MPEG12_MB_TYPE_MOTION_BACKWARD)) {
285        switch (mb->macroblock_modes.bits.frame_motion_type) {
286        case PIPE_MPEG12_MO_TYPE_FRAME:
287           mv.top.x = mb->PMV[0][vector][0];
288           mv.top.y = mb->PMV[0][vector][1];
289           mv.top.field_select = PIPE_VIDEO_FRAME;
290           mv.top.weight = weight;
291  
292           mv.bottom.x = mb->PMV[0][vector][0];
293           mv.bottom.y = mb->PMV[0][vector][1];
294           mv.bottom.weight = weight;
295           mv.bottom.field_select = PIPE_VIDEO_FRAME;
296           break;
297  
298        case PIPE_MPEG12_MO_TYPE_FIELD:
299           mv.top.x = mb->PMV[0][vector][0];
300           mv.top.y = mb->PMV[0][vector][1];
301           mv.top.field_select = (mb->motion_vertical_field_select & field_select_mask) ?
302              PIPE_VIDEO_BOTTOM_FIELD : PIPE_VIDEO_TOP_FIELD;
303           mv.top.weight = weight;
304  
305           mv.bottom.x = mb->PMV[1][vector][0];
306           mv.bottom.y = mb->PMV[1][vector][1];
307           mv.bottom.field_select = (mb->motion_vertical_field_select & (field_select_mask << 2)) ?
308              PIPE_VIDEO_BOTTOM_FIELD : PIPE_VIDEO_TOP_FIELD;
309           mv.bottom.weight = weight;
310           break;
311  
312        default: // TODO: Support DUALPRIME and 16x8
313           break;
314        }
315     } else {
316        mv.top.x = mv.top.y = 0;
317        mv.top.field_select = PIPE_VIDEO_FRAME;
318        mv.top.weight = weight;
319  
320        mv.bottom.x = mv.bottom.y = 0;
321        mv.bottom.field_select = PIPE_VIDEO_FRAME;
322        mv.bottom.weight = weight;
323     }
324     return mv;
325  }
326  
327  static INLINE void
UploadYcbcrBlocks(struct vl_mpeg12_decoder * dec,struct vl_mpeg12_buffer * buf,const struct pipe_mpeg12_macroblock * mb)328  UploadYcbcrBlocks(struct vl_mpeg12_decoder *dec,
329                    struct vl_mpeg12_buffer *buf,
330                    const struct pipe_mpeg12_macroblock *mb)
331  {
332     unsigned intra;
333     unsigned tb, x, y, num_blocks = 0;
334  
335     assert(dec && buf);
336     assert(mb);
337  
338     if (!mb->coded_block_pattern)
339        return;
340  
341     intra = mb->macroblock_type & PIPE_MPEG12_MB_TYPE_INTRA ? 1 : 0;
342  
343     for (y = 0; y < 2; ++y) {
344        for (x = 0; x < 2; ++x) {
345           if (mb->coded_block_pattern & const_empty_block_mask_420[0][y][x]) {
346  
347              struct vl_ycbcr_block *stream = buf->ycbcr_stream[0];
348              stream->x = mb->x * 2 + x;
349              stream->y = mb->y * 2 + y;
350              stream->intra = intra;
351              stream->coding = mb->macroblock_modes.bits.dct_type;
352              stream->block_num = buf->block_num++;
353  
354              buf->num_ycbcr_blocks[0]++;
355              buf->ycbcr_stream[0]++;
356  
357              num_blocks++;
358           }
359        }
360     }
361  
362     /* TODO: Implement 422, 444 */
363     //assert(ctx->base.chroma_format == PIPE_VIDEO_CHROMA_FORMAT_420);
364  
365     for (tb = 1; tb < 3; ++tb) {
366        if (mb->coded_block_pattern & const_empty_block_mask_420[tb][0][0]) {
367  
368           struct vl_ycbcr_block *stream = buf->ycbcr_stream[tb];
369           stream->x = mb->x;
370           stream->y = mb->y;
371           stream->intra = intra;
372           stream->coding = 0;
373           stream->block_num = buf->block_num++;
374  
375           buf->num_ycbcr_blocks[tb]++;
376           buf->ycbcr_stream[tb]++;
377  
378           num_blocks++;
379        }
380     }
381  
382     memcpy(buf->texels, mb->blocks, 64 * sizeof(short) * num_blocks);
383     buf->texels += 64 * num_blocks;
384  }
385  
386  static void
vl_mpeg12_destroy_buffer(void * buffer)387  vl_mpeg12_destroy_buffer(void *buffer)
388  {
389     struct vl_mpeg12_buffer *buf = buffer;
390  
391     assert(buf);
392  
393     cleanup_zscan_buffer(buf);
394     cleanup_idct_buffer(buf);
395     cleanup_mc_buffer(buf);
396     vl_vb_cleanup(&buf->vertex_stream);
397  
398     FREE(buf);
399  }
400  
401  static void
vl_mpeg12_destroy(struct pipe_video_decoder * decoder)402  vl_mpeg12_destroy(struct pipe_video_decoder *decoder)
403  {
404     struct vl_mpeg12_decoder *dec = (struct vl_mpeg12_decoder*)decoder;
405     unsigned i;
406  
407     assert(decoder);
408  
409     /* Asserted in softpipe_delete_fs_state() for some reason */
410     dec->base.context->bind_vs_state(dec->base.context, NULL);
411     dec->base.context->bind_fs_state(dec->base.context, NULL);
412  
413     dec->base.context->delete_depth_stencil_alpha_state(dec->base.context, dec->dsa);
414     dec->base.context->delete_sampler_state(dec->base.context, dec->sampler_ycbcr);
415  
416     vl_mc_cleanup(&dec->mc_y);
417     vl_mc_cleanup(&dec->mc_c);
418     dec->mc_source->destroy(dec->mc_source);
419  
420     if (dec->base.entrypoint <= PIPE_VIDEO_ENTRYPOINT_IDCT) {
421        vl_idct_cleanup(&dec->idct_y);
422        vl_idct_cleanup(&dec->idct_c);
423        dec->idct_source->destroy(dec->idct_source);
424     }
425  
426     vl_zscan_cleanup(&dec->zscan_y);
427     vl_zscan_cleanup(&dec->zscan_c);
428  
429     dec->base.context->delete_vertex_elements_state(dec->base.context, dec->ves_ycbcr);
430     dec->base.context->delete_vertex_elements_state(dec->base.context, dec->ves_mv);
431  
432     pipe_resource_reference(&dec->quads.buffer, NULL);
433     pipe_resource_reference(&dec->pos.buffer, NULL);
434  
435     pipe_sampler_view_reference(&dec->zscan_linear, NULL);
436     pipe_sampler_view_reference(&dec->zscan_normal, NULL);
437     pipe_sampler_view_reference(&dec->zscan_alternate, NULL);
438  
439     for (i = 0; i < 4; ++i)
440        if (dec->dec_buffers[i])
441           vl_mpeg12_destroy_buffer(dec->dec_buffers[i]);
442  
443     FREE(dec);
444  }
445  
446  static struct vl_mpeg12_buffer *
vl_mpeg12_get_decode_buffer(struct vl_mpeg12_decoder * dec,struct pipe_video_buffer * target)447  vl_mpeg12_get_decode_buffer(struct vl_mpeg12_decoder *dec, struct pipe_video_buffer *target)
448  {
449     struct vl_mpeg12_buffer *buffer;
450  
451     assert(dec);
452  
453     buffer = vl_video_buffer_get_associated_data(target, &dec->base);
454     if (buffer)
455        return buffer;
456  
457     buffer = dec->dec_buffers[dec->current_buffer];
458     if (buffer)
459        return buffer;
460  
461     buffer = CALLOC_STRUCT(vl_mpeg12_buffer);
462     if (buffer == NULL)
463        return NULL;
464  
465     if (!vl_vb_init(&buffer->vertex_stream, dec->base.context,
466                     dec->base.width / VL_MACROBLOCK_WIDTH,
467                     dec->base.height / VL_MACROBLOCK_HEIGHT))
468        goto error_vertex_buffer;
469  
470     if (!init_mc_buffer(dec, buffer))
471        goto error_mc;
472  
473     if (dec->base.entrypoint <= PIPE_VIDEO_ENTRYPOINT_IDCT)
474        if (!init_idct_buffer(dec, buffer))
475           goto error_idct;
476  
477     if (!init_zscan_buffer(dec, buffer))
478        goto error_zscan;
479  
480     if (dec->base.entrypoint == PIPE_VIDEO_ENTRYPOINT_BITSTREAM)
481        vl_mpg12_bs_init(&buffer->bs, &dec->base);
482  
483     if (dec->expect_chunked_decode)
484        vl_video_buffer_set_associated_data(target, &dec->base,
485                                            buffer, vl_mpeg12_destroy_buffer);
486     else
487        dec->dec_buffers[dec->current_buffer] = buffer;
488  
489     return buffer;
490  
491  error_zscan:
492     cleanup_idct_buffer(buffer);
493  
494  error_idct:
495     cleanup_mc_buffer(buffer);
496  
497  error_mc:
498     vl_vb_cleanup(&buffer->vertex_stream);
499  
500  error_vertex_buffer:
501     FREE(buffer);
502     return NULL;
503  }
504  
505  static void
vl_mpeg12_begin_frame(struct pipe_video_decoder * decoder,struct pipe_video_buffer * target,struct pipe_picture_desc * picture)506  vl_mpeg12_begin_frame(struct pipe_video_decoder *decoder,
507                        struct pipe_video_buffer *target,
508                        struct pipe_picture_desc *picture)
509  {
510     struct vl_mpeg12_decoder *dec = (struct vl_mpeg12_decoder *)decoder;
511     struct pipe_mpeg12_picture_desc *desc = (struct pipe_mpeg12_picture_desc *)picture;
512     struct vl_mpeg12_buffer *buf;
513  
514     struct pipe_resource *tex;
515     struct pipe_box rect = { 0, 0, 0, 1, 1, 1 };
516  
517     uint8_t intra_matrix[64];
518     uint8_t non_intra_matrix[64];
519  
520     unsigned i;
521  
522     assert(dec && target && picture);
523  
524     buf = vl_mpeg12_get_decode_buffer(dec, target);
525     assert(buf);
526  
527     if (dec->base.entrypoint == PIPE_VIDEO_ENTRYPOINT_BITSTREAM) {
528        memcpy(intra_matrix, desc->intra_matrix, sizeof(intra_matrix));
529        memcpy(non_intra_matrix, desc->non_intra_matrix, sizeof(non_intra_matrix));
530        intra_matrix[0] = 1 << (7 - desc->intra_dc_precision);
531     } else {
532        memset(intra_matrix, 0x10, sizeof(intra_matrix));
533        memset(non_intra_matrix, 0x10, sizeof(non_intra_matrix));
534     }
535  
536     for (i = 0; i < VL_NUM_COMPONENTS; ++i) {
537        struct vl_zscan *zscan = i == 0 ? &dec->zscan_y : &dec->zscan_c;
538        vl_zscan_upload_quant(zscan, &buf->zscan[i], intra_matrix, true);
539        vl_zscan_upload_quant(zscan, &buf->zscan[i], non_intra_matrix, false);
540     }
541  
542     vl_vb_map(&buf->vertex_stream, dec->base.context);
543  
544     tex = buf->zscan_source->texture;
545     rect.width = tex->width0;
546     rect.height = tex->height0;
547  
548     buf->tex_transfer = dec->base.context->get_transfer
549     (
550        dec->base.context, tex,
551        0, PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD_RANGE,
552        &rect
553     );
554  
555     buf->block_num = 0;
556     buf->texels = dec->base.context->transfer_map(dec->base.context, buf->tex_transfer);
557  
558     for (i = 0; i < VL_NUM_COMPONENTS; ++i) {
559        buf->ycbcr_stream[i] = vl_vb_get_ycbcr_stream(&buf->vertex_stream, i);
560        buf->num_ycbcr_blocks[i] = 0;
561     }
562  
563     for (i = 0; i < VL_MAX_REF_FRAMES; ++i)
564        buf->mv_stream[i] = vl_vb_get_mv_stream(&buf->vertex_stream, i);
565  
566     if (dec->base.entrypoint >= PIPE_VIDEO_ENTRYPOINT_IDCT) {
567        for (i = 0; i < VL_NUM_COMPONENTS; ++i)
568           vl_zscan_set_layout(&buf->zscan[i], dec->zscan_linear);
569     }
570  }
571  
572  static void
vl_mpeg12_decode_macroblock(struct pipe_video_decoder * decoder,struct pipe_video_buffer * target,struct pipe_picture_desc * picture,const struct pipe_macroblock * macroblocks,unsigned num_macroblocks)573  vl_mpeg12_decode_macroblock(struct pipe_video_decoder *decoder,
574                              struct pipe_video_buffer *target,
575                              struct pipe_picture_desc *picture,
576                              const struct pipe_macroblock *macroblocks,
577                              unsigned num_macroblocks)
578  {
579     struct vl_mpeg12_decoder *dec = (struct vl_mpeg12_decoder *)decoder;
580     const struct pipe_mpeg12_macroblock *mb = (const struct pipe_mpeg12_macroblock *)macroblocks;
581     struct pipe_mpeg12_picture_desc *desc = (struct pipe_mpeg12_picture_desc *)picture;
582     struct vl_mpeg12_buffer *buf;
583  
584     unsigned i, j, mv_weights[2];
585  
586     assert(dec && target && picture);
587     assert(macroblocks && macroblocks->codec == PIPE_VIDEO_CODEC_MPEG12);
588  
589     buf = vl_mpeg12_get_decode_buffer(dec, target);
590     assert(buf);
591  
592     for (; num_macroblocks > 0; --num_macroblocks) {
593        unsigned mb_addr = mb->y * dec->width_in_macroblocks + mb->x;
594  
595        if (mb->macroblock_type & (PIPE_MPEG12_MB_TYPE_PATTERN | PIPE_MPEG12_MB_TYPE_INTRA))
596           UploadYcbcrBlocks(dec, buf, mb);
597  
598        MacroBlockTypeToPipeWeights(mb, mv_weights);
599  
600        for (i = 0; i < 2; ++i) {
601            if (!desc->ref[i]) continue;
602  
603           buf->mv_stream[i][mb_addr] = MotionVectorToPipe
604           (
605              mb, i,
606              i ? PIPE_MPEG12_FS_FIRST_BACKWARD : PIPE_MPEG12_FS_FIRST_FORWARD,
607              mv_weights[i]
608           );
609        }
610  
611        /* see section 7.6.6 of the spec */
612        if (mb->num_skipped_macroblocks > 0) {
613           struct vl_motionvector skipped_mv[2];
614  
615           if (desc->ref[0] && !desc->ref[1]) {
616              skipped_mv[0].top.x = skipped_mv[0].top.y = 0;
617              skipped_mv[0].top.weight = PIPE_VIDEO_MV_WEIGHT_MAX;
618           } else {
619             skipped_mv[0] = buf->mv_stream[0][mb_addr];
620             skipped_mv[1] = buf->mv_stream[1][mb_addr];
621           }
622           skipped_mv[0].top.field_select = PIPE_VIDEO_FRAME;
623           skipped_mv[1].top.field_select = PIPE_VIDEO_FRAME;
624  
625           skipped_mv[0].bottom = skipped_mv[0].top;
626           skipped_mv[1].bottom = skipped_mv[1].top;
627  
628           ++mb_addr;
629           for (i = 0; i < mb->num_skipped_macroblocks; ++i, ++mb_addr) {
630              for (j = 0; j < 2; ++j) {
631                 if (!desc->ref[j]) continue;
632                 buf->mv_stream[j][mb_addr] = skipped_mv[j];
633  
634              }
635           }
636        }
637  
638        ++mb;
639     }
640  }
641  
642  static void
vl_mpeg12_decode_bitstream(struct pipe_video_decoder * decoder,struct pipe_video_buffer * target,struct pipe_picture_desc * picture,unsigned num_buffers,const void * const * buffers,const unsigned * sizes)643  vl_mpeg12_decode_bitstream(struct pipe_video_decoder *decoder,
644                             struct pipe_video_buffer *target,
645                             struct pipe_picture_desc *picture,
646                             unsigned num_buffers,
647                             const void * const *buffers,
648                             const unsigned *sizes)
649  {
650     struct vl_mpeg12_decoder *dec = (struct vl_mpeg12_decoder *)decoder;
651     struct pipe_mpeg12_picture_desc *desc = (struct pipe_mpeg12_picture_desc *)picture;
652     struct vl_mpeg12_buffer *buf;
653  
654     unsigned i;
655  
656     assert(dec && target && picture);
657  
658     buf = vl_mpeg12_get_decode_buffer(dec, target);
659     assert(buf);
660  
661     for (i = 0; i < VL_NUM_COMPONENTS; ++i)
662        vl_zscan_set_layout(&buf->zscan[i], desc->alternate_scan ?
663                            dec->zscan_alternate : dec->zscan_normal);
664  
665     vl_mpg12_bs_decode(&buf->bs, target, desc, num_buffers, buffers, sizes);
666  }
667  
668  static void
vl_mpeg12_end_frame(struct pipe_video_decoder * decoder,struct pipe_video_buffer * target,struct pipe_picture_desc * picture)669  vl_mpeg12_end_frame(struct pipe_video_decoder *decoder,
670                      struct pipe_video_buffer *target,
671                      struct pipe_picture_desc *picture)
672  {
673     struct vl_mpeg12_decoder *dec = (struct vl_mpeg12_decoder *)decoder;
674     struct pipe_mpeg12_picture_desc *desc = (struct pipe_mpeg12_picture_desc *)picture;
675     struct pipe_sampler_view **ref_frames[2];
676     struct pipe_sampler_view **mc_source_sv;
677     struct pipe_surface **target_surfaces;
678     struct pipe_vertex_buffer vb[3];
679     struct vl_mpeg12_buffer *buf;
680  
681     const unsigned *plane_order;
682     unsigned i, j, component;
683     unsigned nr_components;
684  
685     assert(dec && target && picture);
686     assert(!target->interlaced);
687  
688     buf = vl_mpeg12_get_decode_buffer(dec, target);
689  
690     vl_vb_unmap(&buf->vertex_stream, dec->base.context);
691  
692     dec->base.context->transfer_unmap(dec->base.context, buf->tex_transfer);
693     dec->base.context->transfer_destroy(dec->base.context, buf->tex_transfer);
694  
695     vb[0] = dec->quads;
696     vb[1] = dec->pos;
697  
698     target_surfaces = target->get_surfaces(target);
699  
700     for (i = 0; i < VL_MAX_REF_FRAMES; ++i) {
701        if (desc->ref[i])
702           ref_frames[i] = desc->ref[i]->get_sampler_view_planes(desc->ref[i]);
703        else
704           ref_frames[i] = NULL;
705     }
706  
707     dec->base.context->bind_vertex_elements_state(dec->base.context, dec->ves_mv);
708     for (i = 0; i < VL_NUM_COMPONENTS; ++i) {
709        if (!target_surfaces[i]) continue;
710  
711        vl_mc_set_surface(&buf->mc[i], target_surfaces[i]);
712  
713        for (j = 0; j < VL_MAX_REF_FRAMES; ++j) {
714           if (!ref_frames[j] || !ref_frames[j][i]) continue;
715  
716           vb[2] = vl_vb_get_mv(&buf->vertex_stream, j);;
717           dec->base.context->set_vertex_buffers(dec->base.context, 3, vb);
718  
719           vl_mc_render_ref(i ? &dec->mc_c : &dec->mc_y, &buf->mc[i], ref_frames[j][i]);
720        }
721     }
722  
723     dec->base.context->bind_vertex_elements_state(dec->base.context, dec->ves_ycbcr);
724     for (i = 0; i < VL_NUM_COMPONENTS; ++i) {
725        if (!buf->num_ycbcr_blocks[i]) continue;
726  
727        vb[1] = vl_vb_get_ycbcr(&buf->vertex_stream, i);
728        dec->base.context->set_vertex_buffers(dec->base.context, 2, vb);
729  
730        vl_zscan_render(i ? &dec->zscan_c : & dec->zscan_y, &buf->zscan[i] , buf->num_ycbcr_blocks[i]);
731  
732        if (dec->base.entrypoint <= PIPE_VIDEO_ENTRYPOINT_IDCT)
733           vl_idct_flush(i ? &dec->idct_c : &dec->idct_y, &buf->idct[i], buf->num_ycbcr_blocks[i]);
734     }
735  
736     plane_order = vl_video_buffer_plane_order(target->buffer_format);
737     mc_source_sv = dec->mc_source->get_sampler_view_planes(dec->mc_source);
738     for (i = 0, component = 0; component < VL_NUM_COMPONENTS; ++i) {
739        if (!target_surfaces[i]) continue;
740  
741        nr_components = util_format_get_nr_components(target_surfaces[i]->texture->format);
742        for (j = 0; j < nr_components; ++j, ++component) {
743           unsigned plane = plane_order[component];
744           if (!buf->num_ycbcr_blocks[plane]) continue;
745  
746           vb[1] = vl_vb_get_ycbcr(&buf->vertex_stream, plane);
747           dec->base.context->set_vertex_buffers(dec->base.context, 2, vb);
748  
749           if (dec->base.entrypoint <= PIPE_VIDEO_ENTRYPOINT_IDCT)
750              vl_idct_prepare_stage2(i ? &dec->idct_c : &dec->idct_y, &buf->idct[plane]);
751           else {
752              dec->base.context->set_fragment_sampler_views(dec->base.context, 1, &mc_source_sv[plane]);
753              dec->base.context->bind_fragment_sampler_states(dec->base.context, 1, &dec->sampler_ycbcr);
754           }
755           vl_mc_render_ycbcr(i ? &dec->mc_c : &dec->mc_y, &buf->mc[i], j, buf->num_ycbcr_blocks[plane]);
756        }
757     }
758     ++dec->current_buffer;
759     dec->current_buffer %= 4;
760  }
761  
762  static void
vl_mpeg12_flush(struct pipe_video_decoder * decoder)763  vl_mpeg12_flush(struct pipe_video_decoder *decoder)
764  {
765     assert(decoder);
766  
767     //Noop, for shaders it is much faster to flush everything in end_frame
768  }
769  
770  static bool
init_pipe_state(struct vl_mpeg12_decoder * dec)771  init_pipe_state(struct vl_mpeg12_decoder *dec)
772  {
773     struct pipe_depth_stencil_alpha_state dsa;
774     struct pipe_sampler_state sampler;
775     unsigned i;
776  
777     assert(dec);
778  
779     memset(&dsa, 0, sizeof dsa);
780     dsa.depth.enabled = 0;
781     dsa.depth.writemask = 0;
782     dsa.depth.func = PIPE_FUNC_ALWAYS;
783     for (i = 0; i < 2; ++i) {
784        dsa.stencil[i].enabled = 0;
785        dsa.stencil[i].func = PIPE_FUNC_ALWAYS;
786        dsa.stencil[i].fail_op = PIPE_STENCIL_OP_KEEP;
787        dsa.stencil[i].zpass_op = PIPE_STENCIL_OP_KEEP;
788        dsa.stencil[i].zfail_op = PIPE_STENCIL_OP_KEEP;
789        dsa.stencil[i].valuemask = 0;
790        dsa.stencil[i].writemask = 0;
791     }
792     dsa.alpha.enabled = 0;
793     dsa.alpha.func = PIPE_FUNC_ALWAYS;
794     dsa.alpha.ref_value = 0;
795     dec->dsa = dec->base.context->create_depth_stencil_alpha_state(dec->base.context, &dsa);
796     dec->base.context->bind_depth_stencil_alpha_state(dec->base.context, dec->dsa);
797  
798     memset(&sampler, 0, sizeof(sampler));
799     sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
800     sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
801     sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_BORDER;
802     sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
803     sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
804     sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
805     sampler.compare_mode = PIPE_TEX_COMPARE_NONE;
806     sampler.compare_func = PIPE_FUNC_ALWAYS;
807     sampler.normalized_coords = 1;
808     dec->sampler_ycbcr = dec->base.context->create_sampler_state(dec->base.context, &sampler);
809     if (!dec->sampler_ycbcr)
810        return false;
811  
812     return true;
813  }
814  
815  static const struct format_config*
find_format_config(struct vl_mpeg12_decoder * dec,const struct format_config configs[],unsigned num_configs)816  find_format_config(struct vl_mpeg12_decoder *dec, const struct format_config configs[], unsigned num_configs)
817  {
818     struct pipe_screen *screen;
819     unsigned i;
820  
821     assert(dec);
822  
823     screen = dec->base.context->screen;
824  
825     for (i = 0; i < num_configs; ++i) {
826        if (!screen->is_format_supported(screen, configs[i].zscan_source_format, PIPE_TEXTURE_2D,
827                                         1, PIPE_BIND_SAMPLER_VIEW))
828           continue;
829  
830        if (configs[i].idct_source_format != PIPE_FORMAT_NONE) {
831           if (!screen->is_format_supported(screen, configs[i].idct_source_format, PIPE_TEXTURE_2D,
832                                            1, PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET))
833              continue;
834  
835           if (!screen->is_format_supported(screen, configs[i].mc_source_format, PIPE_TEXTURE_3D,
836                                            1, PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET))
837              continue;
838        } else {
839           if (!screen->is_format_supported(screen, configs[i].mc_source_format, PIPE_TEXTURE_2D,
840                                            1, PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET))
841              continue;
842        }
843        return &configs[i];
844     }
845  
846     return NULL;
847  }
848  
849  static bool
init_zscan(struct vl_mpeg12_decoder * dec,const struct format_config * format_config)850  init_zscan(struct vl_mpeg12_decoder *dec, const struct format_config* format_config)
851  {
852     unsigned num_channels;
853  
854     assert(dec);
855  
856     dec->zscan_source_format = format_config->zscan_source_format;
857     dec->zscan_linear = vl_zscan_layout(dec->base.context, vl_zscan_linear, dec->blocks_per_line);
858     dec->zscan_normal = vl_zscan_layout(dec->base.context, vl_zscan_normal, dec->blocks_per_line);
859     dec->zscan_alternate = vl_zscan_layout(dec->base.context, vl_zscan_alternate, dec->blocks_per_line);
860  
861     num_channels = dec->base.entrypoint <= PIPE_VIDEO_ENTRYPOINT_IDCT ? 4 : 1;
862  
863     if (!vl_zscan_init(&dec->zscan_y, dec->base.context, dec->base.width, dec->base.height,
864                        dec->blocks_per_line, dec->num_blocks, num_channels))
865        return false;
866  
867     if (!vl_zscan_init(&dec->zscan_c, dec->base.context, dec->chroma_width, dec->chroma_height,
868                        dec->blocks_per_line, dec->num_blocks, num_channels))
869        return false;
870  
871     return true;
872  }
873  
874  static bool
init_idct(struct vl_mpeg12_decoder * dec,const struct format_config * format_config)875  init_idct(struct vl_mpeg12_decoder *dec, const struct format_config* format_config)
876  {
877     unsigned nr_of_idct_render_targets, max_inst;
878     enum pipe_format formats[3];
879     struct pipe_video_buffer templat;
880  
881     struct pipe_sampler_view *matrix = NULL;
882  
883     nr_of_idct_render_targets = dec->base.context->screen->get_param
884     (
885        dec->base.context->screen, PIPE_CAP_MAX_RENDER_TARGETS
886     );
887  
888     max_inst = dec->base.context->screen->get_shader_param
889     (
890        dec->base.context->screen, PIPE_SHADER_FRAGMENT, PIPE_SHADER_CAP_MAX_INSTRUCTIONS
891     );
892  
893     // Just assume we need 32 inst per render target, not 100% true, but should work in most cases
894     if (nr_of_idct_render_targets >= 4 && max_inst >= 32*4)
895        // more than 4 render targets usually doesn't makes any seens
896        nr_of_idct_render_targets = 4;
897     else
898        nr_of_idct_render_targets = 1;
899  
900     formats[0] = formats[1] = formats[2] = format_config->idct_source_format;
901     memset(&templat, 0, sizeof(templat));
902     templat.width = dec->base.width / 4;
903     templat.height = dec->base.height;
904     templat.chroma_format = dec->base.chroma_format;
905     dec->idct_source = vl_video_buffer_create_ex
906     (
907        dec->base.context, &templat,
908        formats, 1, PIPE_USAGE_STATIC
909     );
910  
911     if (!dec->idct_source)
912        goto error_idct_source;
913  
914     formats[0] = formats[1] = formats[2] = format_config->mc_source_format;
915     memset(&templat, 0, sizeof(templat));
916     templat.width = dec->base.width / nr_of_idct_render_targets;
917     templat.height = dec->base.height / 4;
918     templat.chroma_format = dec->base.chroma_format;
919     dec->mc_source = vl_video_buffer_create_ex
920     (
921        dec->base.context, &templat,
922        formats, nr_of_idct_render_targets, PIPE_USAGE_STATIC
923     );
924  
925     if (!dec->mc_source)
926        goto error_mc_source;
927  
928     if (!(matrix = vl_idct_upload_matrix(dec->base.context, format_config->idct_scale)))
929        goto error_matrix;
930  
931     if (!vl_idct_init(&dec->idct_y, dec->base.context, dec->base.width, dec->base.height,
932                       nr_of_idct_render_targets, matrix, matrix))
933        goto error_y;
934  
935     if(!vl_idct_init(&dec->idct_c, dec->base.context, dec->chroma_width, dec->chroma_height,
936                      nr_of_idct_render_targets, matrix, matrix))
937        goto error_c;
938  
939     pipe_sampler_view_reference(&matrix, NULL);
940  
941     return true;
942  
943  error_c:
944     vl_idct_cleanup(&dec->idct_y);
945  
946  error_y:
947     pipe_sampler_view_reference(&matrix, NULL);
948  
949  error_matrix:
950     dec->mc_source->destroy(dec->mc_source);
951  
952  error_mc_source:
953     dec->idct_source->destroy(dec->idct_source);
954  
955  error_idct_source:
956     return false;
957  }
958  
959  static bool
init_mc_source_widthout_idct(struct vl_mpeg12_decoder * dec,const struct format_config * format_config)960  init_mc_source_widthout_idct(struct vl_mpeg12_decoder *dec, const struct format_config* format_config)
961  {
962     enum pipe_format formats[3];
963     struct pipe_video_buffer templat;
964  
965     formats[0] = formats[1] = formats[2] = format_config->mc_source_format;
966     memset(&templat, 0, sizeof(templat));
967     templat.width = dec->base.width;
968     templat.height = dec->base.height;
969     templat.chroma_format = dec->base.chroma_format;
970     dec->mc_source = vl_video_buffer_create_ex
971     (
972        dec->base.context, &templat,
973        formats, 1, PIPE_USAGE_STATIC
974     );
975  
976     return dec->mc_source != NULL;
977  }
978  
979  static void
mc_vert_shader_callback(void * priv,struct vl_mc * mc,struct ureg_program * shader,unsigned first_output,struct ureg_dst tex)980  mc_vert_shader_callback(void *priv, struct vl_mc *mc,
981                          struct ureg_program *shader,
982                          unsigned first_output,
983                          struct ureg_dst tex)
984  {
985     struct vl_mpeg12_decoder *dec = priv;
986     struct ureg_dst o_vtex;
987  
988     assert(priv && mc);
989     assert(shader);
990  
991     if (dec->base.entrypoint <= PIPE_VIDEO_ENTRYPOINT_IDCT) {
992        struct vl_idct *idct = mc == &dec->mc_y ? &dec->idct_y : &dec->idct_c;
993        vl_idct_stage2_vert_shader(idct, shader, first_output, tex);
994     } else {
995        o_vtex = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, first_output);
996        ureg_MOV(shader, ureg_writemask(o_vtex, TGSI_WRITEMASK_XY), ureg_src(tex));
997     }
998  }
999  
1000  static void
mc_frag_shader_callback(void * priv,struct vl_mc * mc,struct ureg_program * shader,unsigned first_input,struct ureg_dst dst)1001  mc_frag_shader_callback(void *priv, struct vl_mc *mc,
1002                          struct ureg_program *shader,
1003                          unsigned first_input,
1004                          struct ureg_dst dst)
1005  {
1006     struct vl_mpeg12_decoder *dec = priv;
1007     struct ureg_src src, sampler;
1008  
1009     assert(priv && mc);
1010     assert(shader);
1011  
1012     if (dec->base.entrypoint <= PIPE_VIDEO_ENTRYPOINT_IDCT) {
1013        struct vl_idct *idct = mc == &dec->mc_y ? &dec->idct_y : &dec->idct_c;
1014        vl_idct_stage2_frag_shader(idct, shader, first_input, dst);
1015     } else {
1016        src = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, first_input, TGSI_INTERPOLATE_LINEAR);
1017        sampler = ureg_DECL_sampler(shader, 0);
1018        ureg_TEX(shader, dst, TGSI_TEXTURE_2D, src, sampler);
1019     }
1020  }
1021  
1022  struct pipe_video_decoder *
vl_create_mpeg12_decoder(struct pipe_context * context,enum pipe_video_profile profile,enum pipe_video_entrypoint entrypoint,enum pipe_video_chroma_format chroma_format,unsigned width,unsigned height,unsigned max_references,bool expect_chunked_decode)1023  vl_create_mpeg12_decoder(struct pipe_context *context,
1024                           enum pipe_video_profile profile,
1025                           enum pipe_video_entrypoint entrypoint,
1026                           enum pipe_video_chroma_format chroma_format,
1027                           unsigned width, unsigned height, unsigned max_references,
1028                           bool expect_chunked_decode)
1029  {
1030     const unsigned block_size_pixels = VL_BLOCK_WIDTH * VL_BLOCK_HEIGHT;
1031     const struct format_config *format_config;
1032     struct vl_mpeg12_decoder *dec;
1033  
1034     assert(u_reduce_video_profile(profile) == PIPE_VIDEO_CODEC_MPEG12);
1035  
1036     dec = CALLOC_STRUCT(vl_mpeg12_decoder);
1037  
1038     if (!dec)
1039        return NULL;
1040  
1041     dec->base.context = context;
1042     dec->base.profile = profile;
1043     dec->base.entrypoint = entrypoint;
1044     dec->base.chroma_format = chroma_format;
1045     dec->base.width = width;
1046     dec->base.height = height;
1047     dec->base.max_references = max_references;
1048  
1049     dec->base.destroy = vl_mpeg12_destroy;
1050     dec->base.begin_frame = vl_mpeg12_begin_frame;
1051     dec->base.decode_macroblock = vl_mpeg12_decode_macroblock;
1052     dec->base.decode_bitstream = vl_mpeg12_decode_bitstream;
1053     dec->base.end_frame = vl_mpeg12_end_frame;
1054     dec->base.flush = vl_mpeg12_flush;
1055  
1056     dec->blocks_per_line = MAX2(util_next_power_of_two(dec->base.width) / block_size_pixels, 4);
1057     dec->num_blocks = (dec->base.width * dec->base.height) / block_size_pixels;
1058     dec->width_in_macroblocks = align(dec->base.width, VL_MACROBLOCK_WIDTH) / VL_MACROBLOCK_WIDTH;
1059     dec->expect_chunked_decode = expect_chunked_decode;
1060  
1061     /* TODO: Implement 422, 444 */
1062     assert(dec->base.chroma_format == PIPE_VIDEO_CHROMA_FORMAT_420);
1063  
1064     if (dec->base.chroma_format == PIPE_VIDEO_CHROMA_FORMAT_420) {
1065        dec->chroma_width = dec->base.width / 2;
1066        dec->chroma_height = dec->base.height / 2;
1067        dec->num_blocks = dec->num_blocks * 2;
1068     } else if (dec->base.chroma_format == PIPE_VIDEO_CHROMA_FORMAT_422) {
1069        dec->chroma_width = dec->base.width;
1070        dec->chroma_height = dec->base.height / 2;
1071        dec->num_blocks = dec->num_blocks * 2 + dec->num_blocks;
1072     } else {
1073        dec->chroma_width = dec->base.width;
1074        dec->chroma_height = dec->base.height;
1075        dec->num_blocks = dec->num_blocks * 3;
1076     }
1077  
1078     dec->quads = vl_vb_upload_quads(dec->base.context);
1079     dec->pos = vl_vb_upload_pos(
1080        dec->base.context,
1081        dec->base.width / VL_MACROBLOCK_WIDTH,
1082        dec->base.height / VL_MACROBLOCK_HEIGHT
1083     );
1084  
1085     dec->ves_ycbcr = vl_vb_get_ves_ycbcr(dec->base.context);
1086     dec->ves_mv = vl_vb_get_ves_mv(dec->base.context);
1087  
1088     switch (entrypoint) {
1089     case PIPE_VIDEO_ENTRYPOINT_BITSTREAM:
1090        format_config = find_format_config(dec, bitstream_format_config, num_bitstream_format_configs);
1091        break;
1092  
1093     case PIPE_VIDEO_ENTRYPOINT_IDCT:
1094        format_config = find_format_config(dec, idct_format_config, num_idct_format_configs);
1095        break;
1096  
1097     case PIPE_VIDEO_ENTRYPOINT_MC:
1098        format_config = find_format_config(dec, mc_format_config, num_mc_format_configs);
1099        break;
1100  
1101     default:
1102        assert(0);
1103        FREE(dec);
1104        return NULL;
1105     }
1106  
1107     if (!format_config) {
1108        FREE(dec);
1109        return NULL;
1110     }
1111  
1112     if (!init_zscan(dec, format_config))
1113        goto error_zscan;
1114  
1115     if (entrypoint <= PIPE_VIDEO_ENTRYPOINT_IDCT) {
1116        if (!init_idct(dec, format_config))
1117           goto error_sources;
1118     } else {
1119        if (!init_mc_source_widthout_idct(dec, format_config))
1120           goto error_sources;
1121     }
1122  
1123     if (!vl_mc_init(&dec->mc_y, dec->base.context, dec->base.width, dec->base.height,
1124                     VL_MACROBLOCK_HEIGHT, format_config->mc_scale,
1125                     mc_vert_shader_callback, mc_frag_shader_callback, dec))
1126        goto error_mc_y;
1127  
1128     // TODO
1129     if (!vl_mc_init(&dec->mc_c, dec->base.context, dec->base.width, dec->base.height,
1130                     VL_BLOCK_HEIGHT, format_config->mc_scale,
1131                     mc_vert_shader_callback, mc_frag_shader_callback, dec))
1132        goto error_mc_c;
1133  
1134     if (!init_pipe_state(dec))
1135        goto error_pipe_state;
1136  
1137     return &dec->base;
1138  
1139  error_pipe_state:
1140     vl_mc_cleanup(&dec->mc_c);
1141  
1142  error_mc_c:
1143     vl_mc_cleanup(&dec->mc_y);
1144  
1145  error_mc_y:
1146     if (entrypoint <= PIPE_VIDEO_ENTRYPOINT_IDCT) {
1147        vl_idct_cleanup(&dec->idct_y);
1148        vl_idct_cleanup(&dec->idct_c);
1149        dec->idct_source->destroy(dec->idct_source);
1150     }
1151     dec->mc_source->destroy(dec->mc_source);
1152  
1153  error_sources:
1154     vl_zscan_cleanup(&dec->zscan_y);
1155     vl_zscan_cleanup(&dec->zscan_c);
1156  
1157  error_zscan:
1158     FREE(dec);
1159     return NULL;
1160  }
1161