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FFmpeg/libavcodec/h264_mb.c

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  1. /*

  2.  * H.26L/H.264/AVC/JVT/14496-10/... decoder

  3.  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>

  4.  *

  5.  * This file is part of FFmpeg.

  6.  *

  7.  * FFmpeg is free software; you can redistribute it and/or

  8.  * modify it under the terms of the GNU Lesser General Public

  9.  * License as published by the Free Software Foundation; either

  10.  * version 2.1 of the License, or (at your option) any later version.

  11.  *

  12.  * FFmpeg is distributed in the hope that it will be useful,

  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  15.  * Lesser General Public License for more details.

  16.  *

  17.  * You should have received a copy of the GNU Lesser General Public

  18.  * License along with FFmpeg; if not, write to the Free Software

  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  20.  */

  21. 

  22. /**

  23.  * @file

  24.  * H.264 / AVC / MPEG4 part10 macroblock decoding

  25.  */

  26. 

  27. #include <stdint.h>

  28. 

  29. #include "config.h"

  30. 

  31. #include "libavutil/common.h"

  32. #include "libavutil/intreadwrite.h"

  33. #include "avcodec.h"

  34. #include "h264.h"

  35. #include "qpeldsp.h"

  36. #include "svq3.h"

  37. #include "thread.h"

  38. 

  39. static inline int get_lowest_part_list_y(H264SliceContext *sl,

  40.                                          int n, int height, int y_offset, int list)

  41. {

  42.     int raw_my             = sl->mv_cache[list][scan8[n]][1];

  43.     int filter_height_down = (raw_my & 3) ? 3 : 0;

  44.     int full_my            = (raw_my >> 2) + y_offset;

  45.     int bottom             = full_my + filter_height_down + height;

  46. 

  47.     av_assert2(height >= 0);

  48. 

  49.     return FFMAX(0, bottom);

  50. }

  51. 

  52. static inline void get_lowest_part_y(const H264Context *h, H264SliceContext *sl,

  53.                                      int16_t refs[2][48], int n,

  54.                                      int height, int y_offset, int list0,

  55.                                      int list1, int *nrefs)

  56. {

  57.     int my;

  58. 

  59.     y_offset += 16 * (sl->mb_y >> MB_FIELD(sl));

  60. 

  61.     if (list0) {

  62.         int ref_n = sl->ref_cache[0][scan8[n]];

  63.         H264Ref *ref = &sl->ref_list[0][ref_n];

  64. 

  65.         // Error resilience puts the current picture in the ref list.

  66.         // Don't try to wait on these as it will cause a deadlock.

  67.         // Fields can wait on each other, though.

  68.         if (ref->parent->tf.progress->data != h->cur_pic.tf.progress->data ||

  69.             (ref->reference & 3) != h->picture_structure) {

  70.             my = get_lowest_part_list_y(sl, n, height, y_offset, 0);

  71.             if (refs[0][ref_n] < 0)

  72.                 nrefs[0] += 1;

  73.             refs[0][ref_n] = FFMAX(refs[0][ref_n], my);

  74.         }

  75.     }

  76. 

  77.     if (list1) {

  78.         int ref_n    = sl->ref_cache[1][scan8[n]];

  79.         H264Ref *ref = &sl->ref_list[1][ref_n];

  80. 

  81.         if (ref->parent->tf.progress->data != h->cur_pic.tf.progress->data ||

  82.             (ref->reference & 3) != h->picture_structure) {

  83.             my = get_lowest_part_list_y(sl, n, height, y_offset, 1);

  84.             if (refs[1][ref_n] < 0)

  85.                 nrefs[1] += 1;

  86.             refs[1][ref_n] = FFMAX(refs[1][ref_n], my);

  87.         }

  88.     }

  89. }

  90. 

  91. /**

  92.  * Wait until all reference frames are available for MC operations.

  93.  *

  94.  * @param h the H264 context

  95.  */

  96. static void await_references(const H264Context *h, H264SliceContext *sl)

  97. {

  98.     const int mb_xy   = sl->mb_xy;

  99.     const int mb_type = h->cur_pic.mb_type[mb_xy];

  100.     int16_t refs[2][48];

  101.     int nrefs[2] = { 0 };

  102.     int ref, list;

  103. 

  104.     memset(refs, -1, sizeof(refs));

  105. 

  106.     if (IS_16X16(mb_type)) {

  107.         get_lowest_part_y(h, sl, refs, 0, 16, 0,

  108.                           IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);

  109.     } else if (IS_16X8(mb_type)) {

  110.         get_lowest_part_y(h, sl, refs, 0, 8, 0,

  111.                           IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);

  112.         get_lowest_part_y(h, sl, refs, 8, 8, 8,

  113.                           IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);

  114.     } else if (IS_8X16(mb_type)) {

  115.         get_lowest_part_y(h, sl, refs, 0, 16, 0,

  116.                           IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);

  117.         get_lowest_part_y(h, sl, refs, 4, 16, 0,

  118.                           IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);

  119.     } else {

  120.         int i;

  121. 

  122.         av_assert2(IS_8X8(mb_type));

  123. 

  124.         for (i = 0; i < 4; i++) {

  125.             const int sub_mb_type = sl->sub_mb_type[i];

  126.             const int n           = 4 * i;

  127.             int y_offset          = (i & 2) << 2;

  128. 

  129.             if (IS_SUB_8X8(sub_mb_type)) {

  130.                 get_lowest_part_y(h, sl, refs, n, 8, y_offset,

  131.                                   IS_DIR(sub_mb_type, 0, 0),

  132.                                   IS_DIR(sub_mb_type, 0, 1),

  133.                                   nrefs);

  134.             } else if (IS_SUB_8X4(sub_mb_type)) {

  135.                 get_lowest_part_y(h, sl, refs, n, 4, y_offset,

  136.                                   IS_DIR(sub_mb_type, 0, 0),

  137.                                   IS_DIR(sub_mb_type, 0, 1),

  138.                                   nrefs);

  139.                 get_lowest_part_y(h, sl, refs, n + 2, 4, y_offset + 4,

  140.                                   IS_DIR(sub_mb_type, 0, 0),

  141.                                   IS_DIR(sub_mb_type, 0, 1),

  142.                                   nrefs);

  143.             } else if (IS_SUB_4X8(sub_mb_type)) {

  144.                 get_lowest_part_y(h, sl, refs, n, 8, y_offset,

  145.                                   IS_DIR(sub_mb_type, 0, 0),

  146.                                   IS_DIR(sub_mb_type, 0, 1),

  147.                                   nrefs);

  148.                 get_lowest_part_y(h, sl, refs, n + 1, 8, y_offset,

  149.                                   IS_DIR(sub_mb_type, 0, 0),

  150.                                   IS_DIR(sub_mb_type, 0, 1),

  151.                                   nrefs);

  152.             } else {

  153.                 int j;

  154.                 av_assert2(IS_SUB_4X4(sub_mb_type));

  155.                 for (j = 0; j < 4; j++) {

  156.                     int sub_y_offset = y_offset + 2 * (j & 2);

  157.                     get_lowest_part_y(h, sl, refs, n + j, 4, sub_y_offset,

  158.                                       IS_DIR(sub_mb_type, 0, 0),

  159.                                       IS_DIR(sub_mb_type, 0, 1),

  160.                                       nrefs);

  161.                 }

  162.             }

  163.         }

  164.     }

  165. 

  166.     for (list = sl->list_count - 1; list >= 0; list--)

  167.         for (ref = 0; ref < 48 && nrefs[list]; ref++) {

  168.             int row = refs[list][ref];

  169.             if (row >= 0) {

  170.                 H264Ref *ref_pic  = &sl->ref_list[list][ref];

  171.                 int ref_field         = ref_pic->reference - 1;

  172.                 int ref_field_picture = ref_pic->parent->field_picture;

  173.                 int pic_height        = 16 * h->mb_height >> ref_field_picture;

  174. 

  175.                 row <<= MB_MBAFF(sl);

  176.                 nrefs[list]--;

  177. 

  178.                 if (!FIELD_PICTURE(h) && ref_field_picture) { // frame referencing two fields

  179.                     av_assert2((ref_pic->parent->reference & 3) == 3);

  180.                     ff_thread_await_progress(&ref_pic->parent->tf,

  181.                                              FFMIN((row >> 1) - !(row & 1),

  182.                                                    pic_height - 1),

  183.                                              1);

  184.                     ff_thread_await_progress(&ref_pic->parent->tf,

  185.                                              FFMIN((row >> 1), pic_height - 1),

  186.                                              0);

  187.                 } else if (FIELD_PICTURE(h) && !ref_field_picture) { // field referencing one field of a frame

  188.                     ff_thread_await_progress(&ref_pic->parent->tf,

  189.                                              FFMIN(row * 2 + ref_field,

  190.                                                    pic_height - 1),

  191.                                              0);

  192.                 } else if (FIELD_PICTURE(h)) {

  193.                     ff_thread_await_progress(&ref_pic->parent->tf,

  194.                                              FFMIN(row, pic_height - 1),

  195.                                              ref_field);

  196.                 } else {

  197.                     ff_thread_await_progress(&ref_pic->parent->tf,

  198.                                              FFMIN(row, pic_height - 1),

  199.                                              0);

  200.                 }

  201.             }

  202.         }

  203. }

  204. 

  205. static av_always_inline void mc_dir_part(const H264Context *h, H264SliceContext *sl,

  206.                                          H264Ref *pic,

  207.                                          int n, int square, int height,

  208.                                          int delta, int list,

  209.                                          uint8_t *dest_y, uint8_t *dest_cb,

  210.                                          uint8_t *dest_cr,

  211.                                          int src_x_offset, int src_y_offset,

  212.                                          const qpel_mc_func *qpix_op,

  213.                                          h264_chroma_mc_func chroma_op,

  214.                                          int pixel_shift, int chroma_idc)

  215. {

  216.     const int mx      = sl->mv_cache[list][scan8[n]][0] + src_x_offset * 8;

  217.     int my            = sl->mv_cache[list][scan8[n]][1] + src_y_offset * 8;

  218.     const int luma_xy = (mx & 3) + ((my & 3) << 2);

  219.     ptrdiff_t offset  = (mx >> 2) * (1 << pixel_shift) + (my >> 2) * sl->mb_linesize;

  220.     uint8_t *src_y    = pic->data[0] + offset;

  221.     uint8_t *src_cb, *src_cr;

  222.     int extra_width  = 0;

  223.     int extra_height = 0;

  224.     int emu = 0;

  225.     const int full_mx    = mx >> 2;

  226.     const int full_my    = my >> 2;

  227.     const int pic_width  = 16 * h->mb_width;

  228.     const int pic_height = 16 * h->mb_height >> MB_FIELD(sl);

  229.     int ysh;

  230. 

  231.     if (mx & 7)

  232.         extra_width -= 3;

  233.     if (my & 7)

  234.         extra_height -= 3;

  235. 

  236.     if (full_mx                <          0 - extra_width  ||

  237.         full_my                <          0 - extra_height ||

  238.         full_mx + 16 /*FIXME*/ > pic_width  + extra_width  ||

  239.         full_my + 16 /*FIXME*/ > pic_height + extra_height) {

  240.         h->vdsp.emulated_edge_mc(sl->edge_emu_buffer,

  241.                                  src_y - (2 << pixel_shift) - 2 * sl->mb_linesize,

  242.                                  sl->mb_linesize, sl->mb_linesize,

  243.                                  16 + 5, 16 + 5 /*FIXME*/, full_mx - 2,

  244.                                  full_my - 2, pic_width, pic_height);

  245.         src_y = sl->edge_emu_buffer + (2 << pixel_shift) + 2 * sl->mb_linesize;

  246.         emu   = 1;

  247.     }

  248. 

  249.     qpix_op[luma_xy](dest_y, src_y, sl->mb_linesize); // FIXME try variable height perhaps?

  250.     if (!square)

  251.         qpix_op[luma_xy](dest_y + delta, src_y + delta, sl->mb_linesize);

  252. 

  253.     if (CONFIG_GRAY && h->flags & CODEC_FLAG_GRAY)

  254.         return;

  255. 

  256.     if (chroma_idc == 3 /* yuv444 */) {

  257.         src_cb = pic->data[1] + offset;

  258.         if (emu) {

  259.             h->vdsp.emulated_edge_mc(sl->edge_emu_buffer,

  260.                                      src_cb - (2 << pixel_shift) - 2 * sl->mb_linesize,

  261.                                      sl->mb_linesize, sl->mb_linesize,

  262.                                      16 + 5, 16 + 5 /*FIXME*/,

  263.                                      full_mx - 2, full_my - 2,

  264.                                      pic_width, pic_height);

  265.             src_cb = sl->edge_emu_buffer + (2 << pixel_shift) + 2 * sl->mb_linesize;

  266.         }

  267.         qpix_op[luma_xy](dest_cb, src_cb, sl->mb_linesize); // FIXME try variable height perhaps?

  268.         if (!square)

  269.             qpix_op[luma_xy](dest_cb + delta, src_cb + delta, sl->mb_linesize);

  270. 

  271.         src_cr = pic->data[2] + offset;

  272.         if (emu) {

  273.             h->vdsp.emulated_edge_mc(sl->edge_emu_buffer,

  274.                                      src_cr - (2 << pixel_shift) - 2 * sl->mb_linesize,

  275.                                      sl->mb_linesize, sl->mb_linesize,

  276.                                      16 + 5, 16 + 5 /*FIXME*/,

  277.                                      full_mx - 2, full_my - 2,

  278.                                      pic_width, pic_height);

  279.             src_cr = sl->edge_emu_buffer + (2 << pixel_shift) + 2 * sl->mb_linesize;

  280.         }

  281.         qpix_op[luma_xy](dest_cr, src_cr, sl->mb_linesize); // FIXME try variable height perhaps?

  282.         if (!square)

  283.             qpix_op[luma_xy](dest_cr + delta, src_cr + delta, sl->mb_linesize);

  284.         return;

  285.     }

  286. 

  287.     ysh = 3 - (chroma_idc == 2 /* yuv422 */);

  288.     if (chroma_idc == 1 /* yuv420 */ && MB_FIELD(sl)) {

  289.         // chroma offset when predicting from a field of opposite parity

  290.         my  += 2 * ((sl->mb_y & 1) - (pic->reference - 1));

  291.         emu |= (my >> 3) < 0 || (my >> 3) + 8 >= (pic_height >> 1);

  292.     }

  293. 

  294.     src_cb = pic->data[1] + ((mx >> 3) * (1 << pixel_shift)) +

  295.              (my >> ysh) * sl->mb_uvlinesize;

  296.     src_cr = pic->data[2] + ((mx >> 3) * (1 << pixel_shift)) +

  297.              (my >> ysh) * sl->mb_uvlinesize;

  298. 

  299.     if (emu) {

  300.         h->vdsp.emulated_edge_mc(sl->edge_emu_buffer, src_cb,

  301.                                  sl->mb_uvlinesize, sl->mb_uvlinesize,

  302.                                  9, 8 * chroma_idc + 1, (mx >> 3), (my >> ysh),

  303.                                  pic_width >> 1, pic_height >> (chroma_idc == 1 /* yuv420 */));

  304.         src_cb = sl->edge_emu_buffer;

  305.     }

  306.     chroma_op(dest_cb, src_cb, sl->mb_uvlinesize,

  307.               height >> (chroma_idc == 1 /* yuv420 */),

  308.               mx & 7, ((unsigned)my << (chroma_idc == 2 /* yuv422 */)) & 7);

  309. 

  310.     if (emu) {

  311.         h->vdsp.emulated_edge_mc(sl->edge_emu_buffer, src_cr,

  312.                                  sl->mb_uvlinesize, sl->mb_uvlinesize,

  313.                                  9, 8 * chroma_idc + 1, (mx >> 3), (my >> ysh),

  314.                                  pic_width >> 1, pic_height >> (chroma_idc == 1 /* yuv420 */));

  315.         src_cr = sl->edge_emu_buffer;

  316.     }

  317.     chroma_op(dest_cr, src_cr, sl->mb_uvlinesize, height >> (chroma_idc == 1 /* yuv420 */),

  318.               mx & 7, ((unsigned)my << (chroma_idc == 2 /* yuv422 */)) & 7);

  319. }

  320. 

  321. static av_always_inline void mc_part_std(const H264Context *h, H264SliceContext *sl,

  322.                                          int n, int square,

  323.                                          int height, int delta,

  324.                                          uint8_t *dest_y, uint8_t *dest_cb,

  325.                                          uint8_t *dest_cr,

  326.                                          int x_offset, int y_offset,

  327.                                          const qpel_mc_func *qpix_put,

  328.                                          h264_chroma_mc_func chroma_put,

  329.                                          const qpel_mc_func *qpix_avg,

  330.                                          h264_chroma_mc_func chroma_avg,

  331.                                          int list0, int list1,

  332.                                          int pixel_shift, int chroma_idc)

  333. {

  334.     const qpel_mc_func *qpix_op   = qpix_put;

  335.     h264_chroma_mc_func chroma_op = chroma_put;

  336. 

  337.     dest_y += (2 * x_offset << pixel_shift) + 2 * y_offset * sl->mb_linesize;

  338.     if (chroma_idc == 3 /* yuv444 */) {

  339.         dest_cb += (2 * x_offset << pixel_shift) + 2 * y_offset * sl->mb_linesize;

  340.         dest_cr += (2 * x_offset << pixel_shift) + 2 * y_offset * sl->mb_linesize;

  341.     } else if (chroma_idc == 2 /* yuv422 */) {

  342.         dest_cb += (x_offset << pixel_shift) + 2 * y_offset * sl->mb_uvlinesize;

  343.         dest_cr += (x_offset << pixel_shift) + 2 * y_offset * sl->mb_uvlinesize;

  344.     } else { /* yuv420 */

  345.         dest_cb += (x_offset << pixel_shift) + y_offset * sl->mb_uvlinesize;

  346.         dest_cr += (x_offset << pixel_shift) + y_offset * sl->mb_uvlinesize;

  347.     }

  348.     x_offset += 8 * sl->mb_x;

  349.     y_offset += 8 * (sl->mb_y >> MB_FIELD(sl));

  350. 

  351.     if (list0) {

  352.         H264Ref *ref = &sl->ref_list[0][sl->ref_cache[0][scan8[n]]];

  353.         mc_dir_part(h, sl, ref, n, square, height, delta, 0,

  354.                     dest_y, dest_cb, dest_cr, x_offset, y_offset,

  355.                     qpix_op, chroma_op, pixel_shift, chroma_idc);

  356. 

  357.         qpix_op   = qpix_avg;

  358.         chroma_op = chroma_avg;

  359.     }

  360. 

  361.     if (list1) {

  362.         H264Ref *ref = &sl->ref_list[1][sl->ref_cache[1][scan8[n]]];

  363.         mc_dir_part(h, sl, ref, n, square, height, delta, 1,

  364.                     dest_y, dest_cb, dest_cr, x_offset, y_offset,

  365.                     qpix_op, chroma_op, pixel_shift, chroma_idc);

  366.     }

  367. }

  368. 

  369. static av_always_inline void mc_part_weighted(const H264Context *h, H264SliceContext *sl,

  370.                                               int n, int square,

  371.                                               int height, int delta,

  372.                                               uint8_t *dest_y, uint8_t *dest_cb,

  373.                                               uint8_t *dest_cr,

  374.                                               int x_offset, int y_offset,

  375.                                               const qpel_mc_func *qpix_put,

  376.                                               h264_chroma_mc_func chroma_put,

  377.                                               h264_weight_func luma_weight_op,

  378.                                               h264_weight_func chroma_weight_op,

  379.                                               h264_biweight_func luma_weight_avg,

  380.                                               h264_biweight_func chroma_weight_avg,

  381.                                               int list0, int list1,

  382.                                               int pixel_shift, int chroma_idc)

  383. {

  384.     int chroma_height;

  385. 

  386.     dest_y += (2 * x_offset << pixel_shift) + 2 * y_offset * sl->mb_linesize;

  387.     if (chroma_idc == 3 /* yuv444 */) {

  388.         chroma_height     = height;

  389.         chroma_weight_avg = luma_weight_avg;

  390.         chroma_weight_op  = luma_weight_op;

  391.         dest_cb += (2 * x_offset << pixel_shift) + 2 * y_offset * sl->mb_linesize;

  392.         dest_cr += (2 * x_offset << pixel_shift) + 2 * y_offset * sl->mb_linesize;

  393.     } else if (chroma_idc == 2 /* yuv422 */) {

  394.         chroma_height = height;

  395.         dest_cb      += (x_offset << pixel_shift) + 2 * y_offset * sl->mb_uvlinesize;

  396.         dest_cr      += (x_offset << pixel_shift) + 2 * y_offset * sl->mb_uvlinesize;

  397.     } else { /* yuv420 */

  398.         chroma_height = height >> 1;

  399.         dest_cb      += (x_offset << pixel_shift) + y_offset * sl->mb_uvlinesize;

  400.         dest_cr      += (x_offset << pixel_shift) + y_offset * sl->mb_uvlinesize;

  401.     }

  402.     x_offset += 8 * sl->mb_x;

  403.     y_offset += 8 * (sl->mb_y >> MB_FIELD(sl));

  404. 

  405.     if (list0 && list1) {

  406.         /* don't optimize for luma-only case, since B-frames usually

  407.          * use implicit weights => chroma too. */

  408.         uint8_t *tmp_cb = sl->bipred_scratchpad;

  409.         uint8_t *tmp_cr = sl->bipred_scratchpad + (16 << pixel_shift);

  410.         uint8_t *tmp_y  = sl->bipred_scratchpad + 16 * sl->mb_uvlinesize;

  411.         int refn0       = sl->ref_cache[0][scan8[n]];

  412.         int refn1       = sl->ref_cache[1][scan8[n]];

  413. 

  414.         mc_dir_part(h, sl, &sl->ref_list[0][refn0], n, square, height, delta, 0,

  415.                     dest_y, dest_cb, dest_cr,

  416.                     x_offset, y_offset, qpix_put, chroma_put,

  417.                     pixel_shift, chroma_idc);

  418.         mc_dir_part(h, sl, &sl->ref_list[1][refn1], n, square, height, delta, 1,

  419.                     tmp_y, tmp_cb, tmp_cr,

  420.                     x_offset, y_offset, qpix_put, chroma_put,

  421.                     pixel_shift, chroma_idc);

  422. 

  423.         if (sl->use_weight == 2) {

  424.             int weight0 = sl->implicit_weight[refn0][refn1][sl->mb_y & 1];

  425.             int weight1 = 64 - weight0;

  426.             luma_weight_avg(dest_y, tmp_y, sl->mb_linesize,

  427.                             height, 5, weight0, weight1, 0);

  428.             if (!CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {

  429.                 chroma_weight_avg(dest_cb, tmp_cb, sl->mb_uvlinesize,

  430.                                   chroma_height, 5, weight0, weight1, 0);

  431.                 chroma_weight_avg(dest_cr, tmp_cr, sl->mb_uvlinesize,

  432.                                   chroma_height, 5, weight0, weight1, 0);

  433.             }

  434.         } else {

  435.             luma_weight_avg(dest_y, tmp_y, sl->mb_linesize, height,

  436.                             sl->luma_log2_weight_denom,

  437.                             sl->luma_weight[refn0][0][0],

  438.                             sl->luma_weight[refn1][1][0],

  439.                             sl->luma_weight[refn0][0][1] +

  440.                             sl->luma_weight[refn1][1][1]);

  441.             if (!CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {

  442.                 chroma_weight_avg(dest_cb, tmp_cb, sl->mb_uvlinesize, chroma_height,

  443.                                   sl->chroma_log2_weight_denom,

  444.                                   sl->chroma_weight[refn0][0][0][0],

  445.                                   sl->chroma_weight[refn1][1][0][0],

  446.                                   sl->chroma_weight[refn0][0][0][1] +

  447.                                   sl->chroma_weight[refn1][1][0][1]);

  448.                 chroma_weight_avg(dest_cr, tmp_cr, sl->mb_uvlinesize, chroma_height,

  449.                                   sl->chroma_log2_weight_denom,

  450.                                   sl->chroma_weight[refn0][0][1][0],

  451.                                   sl->chroma_weight[refn1][1][1][0],

  452.                                   sl->chroma_weight[refn0][0][1][1] +

  453.                                   sl->chroma_weight[refn1][1][1][1]);

  454.             }

  455.         }

  456.     } else {

  457.         int list     = list1 ? 1 : 0;

  458.         int refn     = sl->ref_cache[list][scan8[n]];

  459.         H264Ref *ref = &sl->ref_list[list][refn];

  460.         mc_dir_part(h, sl, ref, n, square, height, delta, list,

  461.                     dest_y, dest_cb, dest_cr, x_offset, y_offset,

  462.                     qpix_put, chroma_put, pixel_shift, chroma_idc);

  463. 

  464.         luma_weight_op(dest_y, sl->mb_linesize, height,

  465.                        sl->luma_log2_weight_denom,

  466.                        sl->luma_weight[refn][list][0],

  467.                        sl->luma_weight[refn][list][1]);

  468.         if (!CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {

  469.             if (sl->use_weight_chroma) {

  470.                 chroma_weight_op(dest_cb, sl->mb_uvlinesize, chroma_height,

  471.                                  sl->chroma_log2_weight_denom,

  472.                                  sl->chroma_weight[refn][list][0][0],

  473.                                  sl->chroma_weight[refn][list][0][1]);

  474.                 chroma_weight_op(dest_cr, sl->mb_uvlinesize, chroma_height,

  475.                                  sl->chroma_log2_weight_denom,

  476.                                  sl->chroma_weight[refn][list][1][0],

  477.                                  sl->chroma_weight[refn][list][1][1]);

  478.             }

  479.         }

  480.     }

  481. }

  482. 

  483. static av_always_inline void prefetch_motion(const H264Context *h, H264SliceContext *sl,

  484.                                              int list, int pixel_shift,

  485.                                              int chroma_idc)

  486. {

  487.     /* fetch pixels for estimated mv 4 macroblocks ahead

  488.      * optimized for 64byte cache lines */

  489.     const int refn = sl->ref_cache[list][scan8[0]];

  490.     if (refn >= 0) {

  491.         const int mx  = (sl->mv_cache[list][scan8[0]][0] >> 2) + 16 * sl->mb_x + 8;

  492.         const int my  = (sl->mv_cache[list][scan8[0]][1] >> 2) + 16 * sl->mb_y;

  493.         uint8_t **src = sl->ref_list[list][refn].data;

  494.         int off       =  mx * (1<< pixel_shift) +

  495.                         (my + (sl->mb_x & 3) * 4) * sl->mb_linesize +

  496.                         (64 << pixel_shift);

  497.         h->vdsp.prefetch(src[0] + off, sl->linesize, 4);

  498.         if (chroma_idc == 3 /* yuv444 */) {

  499.             h->vdsp.prefetch(src[1] + off, sl->linesize, 4);

  500.             h->vdsp.prefetch(src[2] + off, sl->linesize, 4);

  501.         } else {

  502.             off= ((mx>>1)+64) * (1<<pixel_shift) + ((my>>1) + (sl->mb_x&7))*sl->uvlinesize;

  503.             h->vdsp.prefetch(src[1] + off, src[2] - src[1], 2);

  504.         }

  505.     }

  506. }

  507. 

  508. static av_always_inline void xchg_mb_border(const H264Context *h, H264SliceContext *sl,

  509.                                             uint8_t *src_y,

  510.                                             uint8_t *src_cb, uint8_t *src_cr,

  511.                                             int linesize, int uvlinesize,

  512.                                             int xchg, int chroma444,

  513.                                             int simple, int pixel_shift)

  514. {

  515.     int deblock_topleft;

  516.     int deblock_top;

  517.     int top_idx = 1;

  518.     uint8_t *top_border_m1;

  519.     uint8_t *top_border;

  520. 

  521.     if (!simple && FRAME_MBAFF(h)) {

  522.         if (sl->mb_y & 1) {

  523.             if (!MB_MBAFF(sl))

  524.                 return;

  525.         } else {

  526.             top_idx = MB_MBAFF(sl) ? 0 : 1;

  527.         }

  528.     }

  529. 

  530.     if (sl->deblocking_filter == 2) {

  531.         deblock_topleft = h->slice_table[sl->mb_xy - 1 - h->mb_stride] == sl->slice_num;

  532.         deblock_top     = sl->top_type;

  533.     } else {

  534.         deblock_topleft = (sl->mb_x > 0);

  535.         deblock_top     = (sl->mb_y > !!MB_FIELD(sl));

  536.     }

  537. 

  538.     src_y  -= linesize   + 1 + pixel_shift;

  539.     src_cb -= uvlinesize + 1 + pixel_shift;

  540.     src_cr -= uvlinesize + 1 + pixel_shift;

  541. 

  542.     top_border_m1 = sl->top_borders[top_idx][sl->mb_x - 1];

  543.     top_border    = sl->top_borders[top_idx][sl->mb_x];

  544. 

  545. #define XCHG(a, b, xchg)                        \

  546.     if (pixel_shift) {                          \

  547.         if (xchg) {                             \

  548.             AV_SWAP64(b + 0, a + 0);            \

  549.             AV_SWAP64(b + 8, a + 8);            \

  550.         } else {                                \

  551.             AV_COPY128(b, a);                   \

  552.         }                                       \

  553.     } else if (xchg)                            \

  554.         AV_SWAP64(b, a);                        \

  555.     else                                        \

  556.         AV_COPY64(b, a);

  557. 

  558.     if (deblock_top) {

  559.         if (deblock_topleft) {

  560.             XCHG(top_border_m1 + (8 << pixel_shift),

  561.                  src_y - (7 << pixel_shift), 1);

  562.         }

  563.         XCHG(top_border + (0 << pixel_shift), src_y + (1 << pixel_shift), xchg);

  564.         XCHG(top_border + (8 << pixel_shift), src_y + (9 << pixel_shift), 1);

  565.         if (sl->mb_x + 1 < h->mb_width) {

  566.             XCHG(sl->top_borders[top_idx][sl->mb_x + 1],

  567.                  src_y + (17 << pixel_shift), 1);

  568.         }

  569.         if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {

  570.             if (chroma444) {

  571.                 if (deblock_topleft) {

  572.                     XCHG(top_border_m1 + (24 << pixel_shift), src_cb - (7 << pixel_shift), 1);

  573.                     XCHG(top_border_m1 + (40 << pixel_shift), src_cr - (7 << pixel_shift), 1);

  574.                 }

  575.                 XCHG(top_border + (16 << pixel_shift), src_cb + (1 << pixel_shift), xchg);

  576.                 XCHG(top_border + (24 << pixel_shift), src_cb + (9 << pixel_shift), 1);

  577.                 XCHG(top_border + (32 << pixel_shift), src_cr + (1 << pixel_shift), xchg);

  578.                 XCHG(top_border + (40 << pixel_shift), src_cr + (9 << pixel_shift), 1);

  579.                 if (sl->mb_x + 1 < h->mb_width) {

  580.                     XCHG(sl->top_borders[top_idx][sl->mb_x + 1] + (16 << pixel_shift), src_cb + (17 << pixel_shift), 1);

  581.                     XCHG(sl->top_borders[top_idx][sl->mb_x + 1] + (32 << pixel_shift), src_cr + (17 << pixel_shift), 1);

  582.                 }

  583.             } else {

  584.                 if (deblock_topleft) {

  585.                     XCHG(top_border_m1 + (16 << pixel_shift), src_cb - (7 << pixel_shift), 1);

  586.                     XCHG(top_border_m1 + (24 << pixel_shift), src_cr - (7 << pixel_shift), 1);

  587.                 }

  588.                 XCHG(top_border + (16 << pixel_shift), src_cb + 1 + pixel_shift, 1);

  589.                 XCHG(top_border + (24 << pixel_shift), src_cr + 1 + pixel_shift, 1);

  590.             }

  591.         }

  592.     }

  593. }

  594. 

  595. static av_always_inline int dctcoef_get(int16_t *mb, int high_bit_depth,

  596.                                         int index)

  597. {

  598.     if (high_bit_depth) {

  599.         return AV_RN32A(((int32_t *)mb) + index);

  600.     } else

  601.         return AV_RN16A(mb + index);

  602. }

  603. 

  604. static av_always_inline void dctcoef_set(int16_t *mb, int high_bit_depth,

  605.                                          int index, int value)

  606. {

  607.     if (high_bit_depth) {

  608.         AV_WN32A(((int32_t *)mb) + index, value);

  609.     } else

  610.         AV_WN16A(mb + index, value);

  611. }

  612. 

  613. static av_always_inline void hl_decode_mb_predict_luma(const H264Context *h,

  614.                                                        H264SliceContext *sl,

  615.                                                        int mb_type, int is_h264,

  616.                                                        int simple,

  617.                                                        int transform_bypass,

  618.                                                        int pixel_shift,

  619.                                                        const int *block_offset,

  620.                                                        int linesize,

  621.                                                        uint8_t *dest_y, int p)

  622. {

  623.     void (*idct_add)(uint8_t *dst, int16_t *block, int stride);

  624.     void (*idct_dc_add)(uint8_t *dst, int16_t *block, int stride);

  625.     int i;

  626.     int qscale = p == 0 ? sl->qscale : sl->chroma_qp[p - 1];

  627.     block_offset += 16 * p;

  628.     if (IS_INTRA4x4(mb_type)) {

  629.         if (IS_8x8DCT(mb_type)) {

  630.             if (transform_bypass) {

  631.                 idct_dc_add =

  632.                 idct_add    = h->h264dsp.h264_add_pixels8_clear;

  633.             } else {

  634.                 idct_dc_add = h->h264dsp.h264_idct8_dc_add;

  635.                 idct_add    = h->h264dsp.h264_idct8_add;

  636.             }

  637.             for (i = 0; i < 16; i += 4) {

  638.                 uint8_t *const ptr = dest_y + block_offset[i];

  639.                 const int dir      = sl->intra4x4_pred_mode_cache[scan8[i]];

  640.                 if (transform_bypass && h->sps.profile_idc == 244 && dir <= 1) {

  641.                     if (h->x264_build != -1) {

  642.                         h->hpc.pred8x8l_add[dir](ptr, sl->mb + (i * 16 + p * 256 << pixel_shift), linesize);

  643.                     } else

  644.                         h->hpc.pred8x8l_filter_add[dir](ptr, sl->mb + (i * 16 + p * 256 << pixel_shift),

  645.                                                         (sl-> topleft_samples_available << i) & 0x8000,

  646.                                                         (sl->topright_samples_available << i) & 0x4000, linesize);

  647.                 } else {

  648.                     const int nnz = sl->non_zero_count_cache[scan8[i + p * 16]];

  649.                     h->hpc.pred8x8l[dir](ptr, (sl->topleft_samples_available << i) & 0x8000,

  650.                                          (sl->topright_samples_available << i) & 0x4000, linesize);

  651.                     if (nnz) {

  652.                         if (nnz == 1 && dctcoef_get(sl->mb, pixel_shift, i * 16 + p * 256))

  653.                             idct_dc_add(ptr, sl->mb + (i * 16 + p * 256 << pixel_shift), linesize);

  654.                         else

  655.                             idct_add(ptr, sl->mb + (i * 16 + p * 256 << pixel_shift), linesize);

  656.                     }

  657.                 }

  658.             }

  659.         } else {

  660.             if (transform_bypass) {

  661.                 idct_dc_add  =

  662.                 idct_add     = h->h264dsp.h264_add_pixels4_clear;

  663.             } else {

  664.                 idct_dc_add = h->h264dsp.h264_idct_dc_add;

  665.                 idct_add    = h->h264dsp.h264_idct_add;

  666.             }

  667.             for (i = 0; i < 16; i++) {

  668.                 uint8_t *const ptr = dest_y + block_offset[i];

  669.                 const int dir      = sl->intra4x4_pred_mode_cache[scan8[i]];

  670. 

  671.                 if (transform_bypass && h->sps.profile_idc == 244 && dir <= 1) {

  672.                     h->hpc.pred4x4_add[dir](ptr, sl->mb + (i * 16 + p * 256 << pixel_shift), linesize);

  673.                 } else {

  674.                     uint8_t *topright;

  675.                     int nnz, tr;

  676.                     uint64_t tr_high;

  677.                     if (dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED) {

  678.                         const int topright_avail = (sl->topright_samples_available << i) & 0x8000;

  679.                         av_assert2(sl->mb_y || linesize <= block_offset[i]);

  680.                         if (!topright_avail) {

  681.                             if (pixel_shift) {

  682.                                 tr_high  = ((uint16_t *)ptr)[3 - linesize / 2] * 0x0001000100010001ULL;

  683.                                 topright = (uint8_t *)&tr_high;

  684.                             } else {

  685.                                 tr       = ptr[3 - linesize] * 0x01010101u;

  686.                                 topright = (uint8_t *)&tr;

  687.                             }

  688.                         } else

  689.                             topright = ptr + (4 << pixel_shift) - linesize;

  690.                     } else

  691.                         topright = NULL;

  692. 

  693.                     h->hpc.pred4x4[dir](ptr, topright, linesize);

  694.                     nnz = sl->non_zero_count_cache[scan8[i + p * 16]];

  695.                     if (nnz) {

  696.                         if (is_h264) {

  697.                             if (nnz == 1 && dctcoef_get(sl->mb, pixel_shift, i * 16 + p * 256))

  698.                                 idct_dc_add(ptr, sl->mb + (i * 16 + p * 256 << pixel_shift), linesize);

  699.                             else

  700.                                 idct_add(ptr, sl->mb + (i * 16 + p * 256 << pixel_shift), linesize);

  701.                         } else if (CONFIG_SVQ3_DECODER)

  702.                             ff_svq3_add_idct_c(ptr, sl->mb + i * 16 + p * 256, linesize, qscale, 0);

  703.                     }

  704.                 }

  705.             }

  706.         }

  707.     } else {

  708.         h->hpc.pred16x16[sl->intra16x16_pred_mode](dest_y, linesize);

  709.         if (is_h264) {

  710.             if (sl->non_zero_count_cache[scan8[LUMA_DC_BLOCK_INDEX + p]]) {

  711.                 if (!transform_bypass)

  712.                     h->h264dsp.h264_luma_dc_dequant_idct(sl->mb + (p * 256 << pixel_shift),

  713.                                                          sl->mb_luma_dc[p],

  714.                                                          h->dequant4_coeff[p][qscale][0]);

  715.                 else {

  716.                     static const uint8_t dc_mapping[16] = {

  717.                          0 * 16,  1 * 16,  4 * 16,  5 * 16,

  718.                          2 * 16,  3 * 16,  6 * 16,  7 * 16,

  719.                          8 * 16,  9 * 16, 12 * 16, 13 * 16,

  720.                         10 * 16, 11 * 16, 14 * 16, 15 * 16

  721.                     };

  722.                     for (i = 0; i < 16; i++)

  723.                         dctcoef_set(sl->mb + (p * 256 << pixel_shift),

  724.                                     pixel_shift, dc_mapping[i],

  725.                                     dctcoef_get(sl->mb_luma_dc[p],

  726.                                                 pixel_shift, i));

  727.                 }

  728.             }

  729.         } else if (CONFIG_SVQ3_DECODER)

  730.             ff_svq3_luma_dc_dequant_idct_c(sl->mb + p * 256,

  731.                                            sl->mb_luma_dc[p], qscale);

  732.     }

  733. }

  734. 

  735. static av_always_inline void hl_decode_mb_idct_luma(const H264Context *h, H264SliceContext *sl,

  736.                                                     int mb_type,

  737.                                                     int is_h264, int simple,

  738.                                                     int transform_bypass,

  739.                                                     int pixel_shift,

  740.                                                     const int *block_offset,

  741.                                                     int linesize,

  742.                                                     uint8_t *dest_y, int p)

  743. {

  744.     void (*idct_add)(uint8_t *dst, int16_t *block, int stride);

  745.     int i;

  746.     block_offset += 16 * p;

  747.     if (!IS_INTRA4x4(mb_type)) {

  748.         if (is_h264) {

  749.             if (IS_INTRA16x16(mb_type)) {

  750.                 if (transform_bypass) {

  751.                     if (h->sps.profile_idc == 244 &&

  752.                         (sl->intra16x16_pred_mode == VERT_PRED8x8 ||

  753.                          sl->intra16x16_pred_mode == HOR_PRED8x8)) {

  754.                         h->hpc.pred16x16_add[sl->intra16x16_pred_mode](dest_y, block_offset,

  755.                                                                       sl->mb + (p * 256 << pixel_shift),

  756.                                                                       linesize);

  757.                     } else {

  758.                         for (i = 0; i < 16; i++)

  759.                             if (sl->non_zero_count_cache[scan8[i + p * 16]] ||

  760.                                 dctcoef_get(sl->mb, pixel_shift, i * 16 + p * 256))

  761.                                 h->h264dsp.h264_add_pixels4_clear(dest_y + block_offset[i],

  762.                                                                   sl->mb + (i * 16 + p * 256 << pixel_shift),

  763.                                                                   linesize);

  764.                     }

  765.                 } else {

  766.                     h->h264dsp.h264_idct_add16intra(dest_y, block_offset,

  767.                                                     sl->mb + (p * 256 << pixel_shift),

  768.                                                     linesize,

  769.                                                     sl->non_zero_count_cache + p * 5 * 8);

  770.                 }

  771.             } else if (sl->cbp & 15) {

  772.                 if (transform_bypass) {

  773.                     const int di = IS_8x8DCT(mb_type) ? 4 : 1;

  774.                     idct_add = IS_8x8DCT(mb_type) ? h->h264dsp.h264_add_pixels8_clear

  775.                                                   : h->h264dsp.h264_add_pixels4_clear;

  776.                     for (i = 0; i < 16; i += di)

  777.                         if (sl->non_zero_count_cache[scan8[i + p * 16]])

  778.                             idct_add(dest_y + block_offset[i],

  779.                                      sl->mb + (i * 16 + p * 256 << pixel_shift),

  780.                                      linesize);

  781.                 } else {

  782.                     if (IS_8x8DCT(mb_type))

  783.                         h->h264dsp.h264_idct8_add4(dest_y, block_offset,

  784.                                                    sl->mb + (p * 256 << pixel_shift),

  785.                                                    linesize,

  786.                                                    sl->non_zero_count_cache + p * 5 * 8);

  787.                     else

  788.                         h->h264dsp.h264_idct_add16(dest_y, block_offset,

  789.                                                    sl->mb + (p * 256 << pixel_shift),

  790.                                                    linesize,

  791.                                                    sl->non_zero_count_cache + p * 5 * 8);

  792.                 }

  793.             }

  794.         } else if (CONFIG_SVQ3_DECODER) {

  795.             for (i = 0; i < 16; i++)

  796.                 if (sl->non_zero_count_cache[scan8[i + p * 16]] || sl->mb[i * 16 + p * 256]) {

  797.                     // FIXME benchmark weird rule, & below

  798.                     uint8_t *const ptr = dest_y + block_offset[i];

  799.                     ff_svq3_add_idct_c(ptr, sl->mb + i * 16 + p * 256, linesize,

  800.                                        sl->qscale, IS_INTRA(mb_type) ? 1 : 0);

  801.                 }

  802.         }

  803.     }

  804. }

  805. 

  806. #define BITS   8

  807. #define SIMPLE 1

  808. #include "h264_mb_template.c"

  809. 

  810. #undef  BITS

  811. #define BITS   16

  812. #include "h264_mb_template.c"

  813. 

  814. #undef  SIMPLE

  815. #define SIMPLE 0

  816. #include "h264_mb_template.c"

  817. 

  818. void ff_h264_hl_decode_mb(const H264Context *h, H264SliceContext *sl)

  819. {

  820.     const int mb_xy   = sl->mb_xy;

  821.     const int mb_type = h->cur_pic.mb_type[mb_xy];

  822.     int is_complex    = CONFIG_SMALL || sl->is_complex ||

  823.                         IS_INTRA_PCM(mb_type) || sl->qscale == 0;

  824. 

  825.     if (CHROMA444(h)) {

  826.         if (is_complex || h->pixel_shift)

  827.             hl_decode_mb_444_complex(h, sl);

  828.         else

  829.             hl_decode_mb_444_simple_8(h, sl);

  830.     } else if (is_complex) {

  831.         hl_decode_mb_complex(h, sl);

  832.     } else if (h->pixel_shift) {

  833.         hl_decode_mb_simple_16(h, sl);

  834.     } else

  835.         hl_decode_mb_simple_8(h, sl);

  836. }