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FFmpeg/libavcodec/cavs.c

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  1. /*

  2.  * Chinese AVS video (AVS1-P2, JiZhun profile) decoder.

  3.  * Copyright (c) 2006  Stefan Gehrer <stefan.gehrer@gmx.de>

  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.  * Chinese AVS video (AVS1-P2, JiZhun profile) decoder

  25.  * @author Stefan Gehrer <stefan.gehrer@gmx.de>

  26.  */

  27. 

  28. #include "avcodec.h"

  29. #include "get_bits.h"

  30. #include "golomb.h"

  31. #include "h264chroma.h"

  32. #include "idctdsp.h"

  33. #include "mathops.h"

  34. #include "qpeldsp.h"

  35. #include "cavs.h"

  36. 

  37. static const uint8_t alpha_tab[64] = {

  38.      0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  2,  2,  2,  3,  3,

  39.      4,  4,  5,  5,  6,  7,  8,  9, 10, 11, 12, 13, 15, 16, 18, 20,

  40.     22, 24, 26, 28, 30, 33, 33, 35, 35, 36, 37, 37, 39, 39, 42, 44,

  41.     46, 48, 50, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64

  42. };

  43. 

  44. static const uint8_t beta_tab[64] = {

  45.      0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  1,  1,  2,  2,  2,

  46.      2,  2,  3,  3,  3,  3,  4,  4,  4,  4,  5,  5,  5,  5,  6,  6,

  47.      6,  7,  7,  7,  8,  8,  8,  9,  9, 10, 10, 11, 11, 12, 13, 14,

  48.     15, 16, 17, 18, 19, 20, 21, 22, 23, 23, 24, 24, 25, 25, 26, 27

  49. };

  50. 

  51. static const uint8_t tc_tab[64] = {

  52.     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

  53.     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2,

  54.     2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4,

  55.     5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9

  56. };

  57. 

  58. /** mark block as unavailable, i.e. out of picture

  59.  *  or not yet decoded */

  60. static const cavs_vector un_mv = { 0, 0, 1, NOT_AVAIL };

  61. 

  62. static const int8_t left_modifier_l[8] = {  0, -1,  6, -1, -1, 7, 6, 7 };

  63. static const int8_t top_modifier_l[8]  = { -1,  1,  5, -1, -1, 5, 7, 7 };

  64. static const int8_t left_modifier_c[7] = {  5, -1,  2, -1,  6, 5, 6 };

  65. static const int8_t top_modifier_c[7]  = {  4,  1, -1, -1,  4, 6, 6 };

  66. 

  67. /*****************************************************************************

  68.  *

  69.  * in-loop deblocking filter

  70.  *

  71.  ****************************************************************************/

  72. 

  73. static inline int get_bs(cavs_vector *mvP, cavs_vector *mvQ, int b)

  74. {

  75.     if ((mvP->ref == REF_INTRA) || (mvQ->ref == REF_INTRA))

  76.         return 2;

  77.     if((abs(mvP->x - mvQ->x) >= 4) ||

  78.        (abs(mvP->y - mvQ->y) >= 4) ||

  79.        (mvP->ref != mvQ->ref))

  80.         return 1;

  81.     if (b) {

  82.         mvP += MV_BWD_OFFS;

  83.         mvQ += MV_BWD_OFFS;

  84.         if((abs(mvP->x - mvQ->x) >= 4) ||

  85.            (abs(mvP->y - mvQ->y) >= 4) ||

  86.            (mvP->ref != mvQ->ref))

  87.             return 1;

  88.     }

  89.     return 0;

  90. }

  91. 

  92. #define SET_PARAMS                                                \

  93.     alpha = alpha_tab[av_clip(qp_avg + h->alpha_offset, 0, 63)];  \

  94.     beta  =  beta_tab[av_clip(qp_avg + h->beta_offset,  0, 63)];  \

  95.     tc    =    tc_tab[av_clip(qp_avg + h->alpha_offset, 0, 63)];

  96. 

  97. /**

  98.  * in-loop deblocking filter for a single macroblock

  99.  *

  100.  * boundary strength (bs) mapping:

  101.  *

  102.  * --4---5--

  103.  * 0   2   |

  104.  * | 6 | 7 |

  105.  * 1   3   |

  106.  * ---------

  107.  *

  108.  */

  109. void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type)

  110. {

  111.     uint8_t bs[8];

  112.     int qp_avg, alpha, beta, tc;

  113.     int i;

  114. 

  115.     /* save un-deblocked lines */

  116.     h->topleft_border_y = h->top_border_y[h->mbx * 16 + 15];

  117.     h->topleft_border_u = h->top_border_u[h->mbx * 10 + 8];

  118.     h->topleft_border_v = h->top_border_v[h->mbx * 10 + 8];

  119.     memcpy(&h->top_border_y[h->mbx * 16],     h->cy + 15 * h->l_stride, 16);

  120.     memcpy(&h->top_border_u[h->mbx * 10 + 1], h->cu +  7 * h->c_stride, 8);

  121.     memcpy(&h->top_border_v[h->mbx * 10 + 1], h->cv +  7 * h->c_stride, 8);

  122.     for (i = 0; i < 8; i++) {

  123.         h->left_border_y[i * 2 + 1] = *(h->cy + 15 + (i * 2 + 0) * h->l_stride);

  124.         h->left_border_y[i * 2 + 2] = *(h->cy + 15 + (i * 2 + 1) * h->l_stride);

  125.         h->left_border_u[i + 1]     = *(h->cu + 7  +  i          * h->c_stride);

  126.         h->left_border_v[i + 1]     = *(h->cv + 7  +  i          * h->c_stride);

  127.     }

  128.     if (!h->loop_filter_disable) {

  129.         /* determine bs */

  130.         if (mb_type == I_8X8)

  131.             memset(bs, 2, 8);

  132.         else {

  133.             memset(bs, 0, 8);

  134.             if (ff_cavs_partition_flags[mb_type] & SPLITV) {

  135.                 bs[2] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X1], mb_type > P_8X8);

  136.                 bs[3] = get_bs(&h->mv[MV_FWD_X2], &h->mv[MV_FWD_X3], mb_type > P_8X8);

  137.             }

  138.             if (ff_cavs_partition_flags[mb_type] & SPLITH) {

  139.                 bs[6] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X2], mb_type > P_8X8);

  140.                 bs[7] = get_bs(&h->mv[MV_FWD_X1], &h->mv[MV_FWD_X3], mb_type > P_8X8);

  141.             }

  142.             bs[0] = get_bs(&h->mv[MV_FWD_A1], &h->mv[MV_FWD_X0], mb_type > P_8X8);

  143.             bs[1] = get_bs(&h->mv[MV_FWD_A3], &h->mv[MV_FWD_X2], mb_type > P_8X8);

  144.             bs[4] = get_bs(&h->mv[MV_FWD_B2], &h->mv[MV_FWD_X0], mb_type > P_8X8);

  145.             bs[5] = get_bs(&h->mv[MV_FWD_B3], &h->mv[MV_FWD_X1], mb_type > P_8X8);

  146.         }

  147.         if (AV_RN64(bs)) {

  148.             if (h->flags & A_AVAIL) {

  149.                 qp_avg = (h->qp + h->left_qp + 1) >> 1;

  150.                 SET_PARAMS;

  151.                 h->cdsp.cavs_filter_lv(h->cy, h->l_stride, alpha, beta, tc, bs[0], bs[1]);

  152.                 qp_avg = (ff_cavs_chroma_qp[h->qp] + ff_cavs_chroma_qp[h->left_qp] + 1) >> 1;

  153.                 SET_PARAMS;

  154.                 h->cdsp.cavs_filter_cv(h->cu, h->c_stride, alpha, beta, tc, bs[0], bs[1]);

  155.                 h->cdsp.cavs_filter_cv(h->cv, h->c_stride, alpha, beta, tc, bs[0], bs[1]);

  156.             }

  157.             qp_avg = h->qp;

  158.             SET_PARAMS;

  159.             h->cdsp.cavs_filter_lv(h->cy + 8,               h->l_stride, alpha, beta, tc, bs[2], bs[3]);

  160.             h->cdsp.cavs_filter_lh(h->cy + 8 * h->l_stride, h->l_stride, alpha, beta, tc, bs[6], bs[7]);

  161. 

  162.             if (h->flags & B_AVAIL) {

  163.                 qp_avg = (h->qp + h->top_qp[h->mbx] + 1) >> 1;

  164.                 SET_PARAMS;

  165.                 h->cdsp.cavs_filter_lh(h->cy, h->l_stride, alpha, beta, tc, bs[4], bs[5]);

  166.                 qp_avg = (ff_cavs_chroma_qp[h->qp] + ff_cavs_chroma_qp[h->top_qp[h->mbx]] + 1) >> 1;

  167.                 SET_PARAMS;

  168.                 h->cdsp.cavs_filter_ch(h->cu, h->c_stride, alpha, beta, tc, bs[4], bs[5]);

  169.                 h->cdsp.cavs_filter_ch(h->cv, h->c_stride, alpha, beta, tc, bs[4], bs[5]);

  170.             }

  171.         }

  172.     }

  173.     h->left_qp        = h->qp;

  174.     h->top_qp[h->mbx] = h->qp;

  175. }

  176. 

  177. #undef SET_PARAMS

  178. 

  179. /*****************************************************************************

  180.  *

  181.  * spatial intra prediction

  182.  *

  183.  ****************************************************************************/

  184. 

  185. void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top,

  186.                                   uint8_t **left, int block)

  187. {

  188.     int i;

  189. 

  190.     switch (block) {

  191.     case 0:

  192.         *left               = h->left_border_y;

  193.         h->left_border_y[0] = h->left_border_y[1];

  194.         memset(&h->left_border_y[17], h->left_border_y[16], 9);

  195.         memcpy(&top[1], &h->top_border_y[h->mbx * 16], 16);

  196.         top[17] = top[16];

  197.         top[0]  = top[1];

  198.         if ((h->flags & A_AVAIL) && (h->flags & B_AVAIL))

  199.             h->left_border_y[0] = top[0] = h->topleft_border_y;

  200.         break;

  201.     case 1:

  202.         *left = h->intern_border_y;

  203.         for (i = 0; i < 8; i++)

  204.             h->intern_border_y[i + 1] = *(h->cy + 7 + i * h->l_stride);

  205.         memset(&h->intern_border_y[9], h->intern_border_y[8], 9);

  206.         h->intern_border_y[0] = h->intern_border_y[1];

  207.         memcpy(&top[1], &h->top_border_y[h->mbx * 16 + 8], 8);

  208.         if (h->flags & C_AVAIL)

  209.             memcpy(&top[9], &h->top_border_y[(h->mbx + 1) * 16], 8);

  210.         else

  211.             memset(&top[9], top[8], 9);

  212.         top[17] = top[16];

  213.         top[0]  = top[1];

  214.         if (h->flags & B_AVAIL)

  215.             h->intern_border_y[0] = top[0] = h->top_border_y[h->mbx * 16 + 7];

  216.         break;

  217.     case 2:

  218.         *left = &h->left_border_y[8];

  219.         memcpy(&top[1], h->cy + 7 * h->l_stride, 16);

  220.         top[17] = top[16];

  221.         top[0]  = top[1];

  222.         if (h->flags & A_AVAIL)

  223.             top[0] = h->left_border_y[8];

  224.         break;

  225.     case 3:

  226.         *left = &h->intern_border_y[8];

  227.         for (i = 0; i < 8; i++)

  228.             h->intern_border_y[i + 9] = *(h->cy + 7 + (i + 8) * h->l_stride);

  229.         memset(&h->intern_border_y[17], h->intern_border_y[16], 9);

  230.         memcpy(&top[0], h->cy + 7 + 7 * h->l_stride, 9);

  231.         memset(&top[9], top[8], 9);

  232.         break;

  233.     }

  234. }

  235. 

  236. void ff_cavs_load_intra_pred_chroma(AVSContext *h)

  237. {

  238.     /* extend borders by one pixel */

  239.     h->left_border_u[9]              = h->left_border_u[8];

  240.     h->left_border_v[9]              = h->left_border_v[8];

  241.     if(h->flags & C_AVAIL) {

  242.         h->top_border_u[h->mbx*10 + 9] = h->top_border_u[h->mbx*10 + 11];

  243.         h->top_border_v[h->mbx*10 + 9] = h->top_border_v[h->mbx*10 + 11];

  244.     } else {

  245.         h->top_border_u[h->mbx * 10 + 9] = h->top_border_u[h->mbx * 10 + 8];

  246.         h->top_border_v[h->mbx * 10 + 9] = h->top_border_v[h->mbx * 10 + 8];

  247.     }

  248.     if((h->flags & A_AVAIL) && (h->flags & B_AVAIL)) {

  249.         h->top_border_u[h->mbx * 10] = h->left_border_u[0] = h->topleft_border_u;

  250.         h->top_border_v[h->mbx * 10] = h->left_border_v[0] = h->topleft_border_v;

  251.     } else {

  252.         h->left_border_u[0]          = h->left_border_u[1];

  253.         h->left_border_v[0]          = h->left_border_v[1];

  254.         h->top_border_u[h->mbx * 10] = h->top_border_u[h->mbx * 10 + 1];

  255.         h->top_border_v[h->mbx * 10] = h->top_border_v[h->mbx * 10 + 1];

  256.     }

  257. }

  258. 

  259. static void intra_pred_vert(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

  260. {

  261.     int y;

  262.     uint64_t a = AV_RN64(&top[1]);

  263.     for (y = 0; y < 8; y++)

  264.         *((uint64_t *)(d + y * stride)) = a;

  265. }

  266. 

  267. static void intra_pred_horiz(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

  268. {

  269.     int y;

  270.     uint64_t a;

  271.     for (y = 0; y < 8; y++) {

  272.         a = left[y + 1] * 0x0101010101010101ULL;

  273.         *((uint64_t *)(d + y * stride)) = a;

  274.     }

  275. }

  276. 

  277. static void intra_pred_dc_128(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

  278. {

  279.     int y;

  280.     uint64_t a = 0x8080808080808080ULL;

  281.     for (y = 0; y < 8; y++)

  282.         *((uint64_t *)(d + y * stride)) = a;

  283. }

  284. 

  285. static void intra_pred_plane(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

  286. {

  287.     int x, y, ia;

  288.     int ih = 0;

  289.     int iv = 0;

  290.     const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;

  291. 

  292.     for (x = 0; x < 4; x++) {

  293.         ih += (x + 1) *  (top[5 + x] -  top[3 - x]);

  294.         iv += (x + 1) * (left[5 + x] - left[3 - x]);

  295.     }

  296.     ia = (top[8] + left[8]) << 4;

  297.     ih = (17 * ih + 16) >> 5;

  298.     iv = (17 * iv + 16) >> 5;

  299.     for (y = 0; y < 8; y++)

  300.         for (x = 0; x < 8; x++)

  301.             d[y * stride + x] = cm[(ia + (x - 3) * ih + (y - 3) * iv + 16) >> 5];

  302. }

  303. 

  304. #define LOWPASS(ARRAY, INDEX)                                           \

  305.     ((ARRAY[(INDEX) - 1] + 2 * ARRAY[(INDEX)] + ARRAY[(INDEX) + 1] + 2) >> 2)

  306. 

  307. static void intra_pred_lp(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

  308. {

  309.     int x, y;

  310.     for (y = 0; y < 8; y++)

  311.         for (x = 0; x < 8; x++)

  312.             d[y * stride + x] = (LOWPASS(top, x + 1) + LOWPASS(left, y + 1)) >> 1;

  313. }

  314. 

  315. static void intra_pred_down_left(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

  316. {

  317.     int x, y;

  318.     for (y = 0; y < 8; y++)

  319.         for (x = 0; x < 8; x++)

  320.             d[y * stride + x] = (LOWPASS(top, x + y + 2) + LOWPASS(left, x + y + 2)) >> 1;

  321. }

  322. 

  323. static void intra_pred_down_right(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

  324. {

  325.     int x, y;

  326.     for (y = 0; y < 8; y++)

  327.         for (x = 0; x < 8; x++)

  328.             if (x == y)

  329.                 d[y * stride + x] = (left[1] + 2 * top[0] + top[1] + 2) >> 2;

  330.             else if (x > y)

  331.                 d[y * stride + x] = LOWPASS(top, x - y);

  332.             else

  333.                 d[y * stride + x] = LOWPASS(left, y - x);

  334. }

  335. 

  336. static void intra_pred_lp_left(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

  337. {

  338.     int x, y;

  339.     for (y = 0; y < 8; y++)

  340.         for (x = 0; x < 8; x++)

  341.             d[y * stride + x] = LOWPASS(left, y + 1);

  342. }

  343. 

  344. static void intra_pred_lp_top(uint8_t *d, uint8_t *top, uint8_t *left, int stride)

  345. {

  346.     int x, y;

  347.     for (y = 0; y < 8; y++)

  348.         for (x = 0; x < 8; x++)

  349.             d[y * stride + x] = LOWPASS(top, x + 1);

  350. }

  351. 

  352. #undef LOWPASS

  353. 

  354. static inline void modify_pred(const int8_t *mod_table, int *mode)

  355. {

  356.     *mode = mod_table[*mode];

  357.     if (*mode < 0) {

  358.         av_log(NULL, AV_LOG_ERROR, "Illegal intra prediction mode\n");

  359.         *mode = 0;

  360.     }

  361. }

  362. 

  363. void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv)

  364. {

  365.     /* save pred modes before they get modified */

  366.     h->pred_mode_Y[3]             = h->pred_mode_Y[5];

  367.     h->pred_mode_Y[6]             = h->pred_mode_Y[8];

  368.     h->top_pred_Y[h->mbx * 2 + 0] = h->pred_mode_Y[7];

  369.     h->top_pred_Y[h->mbx * 2 + 1] = h->pred_mode_Y[8];

  370. 

  371.     /* modify pred modes according to availability of neighbour samples */

  372.     if (!(h->flags & A_AVAIL)) {

  373.         modify_pred(left_modifier_l, &h->pred_mode_Y[4]);

  374.         modify_pred(left_modifier_l, &h->pred_mode_Y[7]);

  375.         modify_pred(left_modifier_c, pred_mode_uv);

  376.     }

  377.     if (!(h->flags & B_AVAIL)) {

  378.         modify_pred(top_modifier_l, &h->pred_mode_Y[4]);

  379.         modify_pred(top_modifier_l, &h->pred_mode_Y[5]);

  380.         modify_pred(top_modifier_c, pred_mode_uv);

  381.     }

  382. }

  383. 

  384. /*****************************************************************************

  385.  *

  386.  * motion compensation

  387.  *

  388.  ****************************************************************************/

  389. 

  390. static inline void mc_dir_part(AVSContext *h, AVFrame *pic, int chroma_height,

  391.                                int delta, int list, uint8_t *dest_y,

  392.                                uint8_t *dest_cb, uint8_t *dest_cr,

  393.                                int src_x_offset, int src_y_offset,

  394.                                qpel_mc_func *qpix_op,

  395.                                h264_chroma_mc_func chroma_op, cavs_vector *mv)

  396. {

  397.     const int mx         = mv->x + src_x_offset * 8;

  398.     const int my         = mv->y + src_y_offset * 8;

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

  400.     uint8_t *src_y       = pic->data[0] + (mx >> 2) + (my >> 2) * h->l_stride;

  401.     uint8_t *src_cb      = pic->data[1] + (mx >> 3) + (my >> 3) * h->c_stride;

  402.     uint8_t *src_cr      = pic->data[2] + (mx >> 3) + (my >> 3) * h->c_stride;

  403.     int extra_width      = 0;

  404.     int extra_height     = extra_width;

  405.     const int full_mx    = mx >> 2;

  406.     const int full_my    = my >> 2;

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

  408.     const int pic_height = 16 * h->mb_height;

  409.     int emu = 0;

  410. 

  411.     if (!pic->data[0])

  412.         return;

  413.     if (mx & 7)

  414.         extra_width  -= 3;

  415.     if (my & 7)

  416.         extra_height -= 3;

  417. 

  418.     if (full_mx < 0 - extra_width ||

  419.         full_my < 0 - extra_height ||

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

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

  422.         h->vdsp.emulated_edge_mc(h->edge_emu_buffer,

  423.                                  src_y - 2 - 2 * h->l_stride,

  424.                                  h->l_stride, h->l_stride,

  425.                                  16 + 5, 16 + 5 /* FIXME */,

  426.                                  full_mx - 2, full_my - 2,

  427.                                  pic_width, pic_height);

  428.         src_y = h->edge_emu_buffer + 2 + 2 * h->l_stride;

  429.         emu   = 1;

  430.     }

  431. 

  432.     // FIXME try variable height perhaps?

  433.     qpix_op[luma_xy](dest_y, src_y, h->l_stride);

  434. 

  435.     if (emu) {

  436.         h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cb,

  437.                                  h->c_stride, h->c_stride,

  438.                                  9, 9 /* FIXME */,

  439.                                  mx >> 3, my >> 3,

  440.                                  pic_width >> 1, pic_height >> 1);

  441.         src_cb = h->edge_emu_buffer;

  442.     }

  443.     chroma_op(dest_cb, src_cb, h->c_stride, chroma_height, mx & 7, my & 7);

  444. 

  445.     if (emu) {

  446.         h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cr,

  447.                                  h->c_stride, h->c_stride,

  448.                                  9, 9 /* FIXME */,

  449.                                  mx >> 3, my >> 3,

  450.                                  pic_width >> 1, pic_height >> 1);

  451.         src_cr = h->edge_emu_buffer;

  452.     }

  453.     chroma_op(dest_cr, src_cr, h->c_stride, chroma_height, mx & 7, my & 7);

  454. }

  455. 

  456. static inline void mc_part_std(AVSContext *h, int chroma_height, int delta,

  457.                                uint8_t *dest_y,

  458.                                uint8_t *dest_cb,

  459.                                uint8_t *dest_cr,

  460.                                int x_offset, int y_offset,

  461.                                qpel_mc_func *qpix_put,

  462.                                h264_chroma_mc_func chroma_put,

  463.                                qpel_mc_func *qpix_avg,

  464.                                h264_chroma_mc_func chroma_avg,

  465.                                cavs_vector *mv)

  466. {

  467.     qpel_mc_func *qpix_op =  qpix_put;

  468.     h264_chroma_mc_func chroma_op = chroma_put;

  469. 

  470.     dest_y   += x_offset * 2 + y_offset * h->l_stride * 2;

  471.     dest_cb  += x_offset     + y_offset * h->c_stride;

  472.     dest_cr  += x_offset     + y_offset * h->c_stride;

  473.     x_offset += 8 * h->mbx;

  474.     y_offset += 8 * h->mby;

  475. 

  476.     if (mv->ref >= 0) {

  477.         AVFrame *ref = h->DPB[mv->ref].f;

  478.         mc_dir_part(h, ref, chroma_height, delta, 0,

  479.                     dest_y, dest_cb, dest_cr, x_offset, y_offset,

  480.                     qpix_op, chroma_op, mv);

  481. 

  482.         qpix_op   = qpix_avg;

  483.         chroma_op = chroma_avg;

  484.     }

  485. 

  486.     if ((mv + MV_BWD_OFFS)->ref >= 0) {

  487.         AVFrame *ref = h->DPB[0].f;

  488.         mc_dir_part(h, ref, chroma_height, delta, 1,

  489.                     dest_y, dest_cb, dest_cr, x_offset, y_offset,

  490.                     qpix_op, chroma_op, mv + MV_BWD_OFFS);

  491.     }

  492. }

  493. 

  494. void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type)

  495. {

  496.     if (ff_cavs_partition_flags[mb_type] == 0) { // 16x16

  497.         mc_part_std(h, 8, 0, h->cy, h->cu, h->cv, 0, 0,

  498.                     h->cdsp.put_cavs_qpel_pixels_tab[0],

  499.                     h->h264chroma.put_h264_chroma_pixels_tab[0],

  500.                     h->cdsp.avg_cavs_qpel_pixels_tab[0],

  501.                     h->h264chroma.avg_h264_chroma_pixels_tab[0],

  502.                     &h->mv[MV_FWD_X0]);

  503.     } else {

  504.         mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 0,

  505.                     h->cdsp.put_cavs_qpel_pixels_tab[1],

  506.                     h->h264chroma.put_h264_chroma_pixels_tab[1],

  507.                     h->cdsp.avg_cavs_qpel_pixels_tab[1],

  508.                     h->h264chroma.avg_h264_chroma_pixels_tab[1],

  509.                     &h->mv[MV_FWD_X0]);

  510.         mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 0,

  511.                     h->cdsp.put_cavs_qpel_pixels_tab[1],

  512.                     h->h264chroma.put_h264_chroma_pixels_tab[1],

  513.                     h->cdsp.avg_cavs_qpel_pixels_tab[1],

  514.                     h->h264chroma.avg_h264_chroma_pixels_tab[1],

  515.                     &h->mv[MV_FWD_X1]);

  516.         mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 4,

  517.                     h->cdsp.put_cavs_qpel_pixels_tab[1],

  518.                     h->h264chroma.put_h264_chroma_pixels_tab[1],

  519.                     h->cdsp.avg_cavs_qpel_pixels_tab[1],

  520.                     h->h264chroma.avg_h264_chroma_pixels_tab[1],

  521.                     &h->mv[MV_FWD_X2]);

  522.         mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 4,

  523.                     h->cdsp.put_cavs_qpel_pixels_tab[1],

  524.                     h->h264chroma.put_h264_chroma_pixels_tab[1],

  525.                     h->cdsp.avg_cavs_qpel_pixels_tab[1],

  526.                     h->h264chroma.avg_h264_chroma_pixels_tab[1],

  527.                     &h->mv[MV_FWD_X3]);

  528.     }

  529. }

  530. 

  531. /*****************************************************************************

  532.  *

  533.  * motion vector prediction

  534.  *

  535.  ****************************************************************************/

  536. 

  537. static inline void scale_mv(AVSContext *h, int *d_x, int *d_y,

  538.                             cavs_vector *src, int distp)

  539. {

  540.     int den = h->scale_den[FFMAX(src->ref, 0)];

  541. 

  542.     *d_x = (src->x * distp * den + 256 + (src->x >> 31)) >> 9;

  543.     *d_y = (src->y * distp * den + 256 + (src->y >> 31)) >> 9;

  544. }

  545. 

  546. static inline void mv_pred_median(AVSContext *h,

  547.                                   cavs_vector *mvP,

  548.                                   cavs_vector *mvA,

  549.                                   cavs_vector *mvB,

  550.                                   cavs_vector *mvC)

  551. {

  552.     int ax, ay, bx, by, cx, cy;

  553.     int len_ab, len_bc, len_ca, len_mid;

  554. 

  555.     /* scale candidates according to their temporal span */

  556.     scale_mv(h, &ax, &ay, mvA, mvP->dist);

  557.     scale_mv(h, &bx, &by, mvB, mvP->dist);

  558.     scale_mv(h, &cx, &cy, mvC, mvP->dist);

  559.     /* find the geometrical median of the three candidates */

  560.     len_ab  = abs(ax - bx) + abs(ay - by);

  561.     len_bc  = abs(bx - cx) + abs(by - cy);

  562.     len_ca  = abs(cx - ax) + abs(cy - ay);

  563.     len_mid = mid_pred(len_ab, len_bc, len_ca);

  564.     if (len_mid == len_ab) {

  565.         mvP->x = cx;

  566.         mvP->y = cy;

  567.     } else if (len_mid == len_bc) {

  568.         mvP->x = ax;

  569.         mvP->y = ay;

  570.     } else {

  571.         mvP->x = bx;

  572.         mvP->y = by;

  573.     }

  574. }

  575. 

  576. void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,

  577.                 enum cavs_mv_pred mode, enum cavs_block size, int ref)

  578. {

  579.     cavs_vector *mvP = &h->mv[nP];

  580.     cavs_vector *mvA = &h->mv[nP-1];

  581.     cavs_vector *mvB = &h->mv[nP-4];

  582.     cavs_vector *mvC = &h->mv[nC];

  583.     const cavs_vector *mvP2 = NULL;

  584. 

  585.     mvP->ref  = ref;

  586.     mvP->dist = h->dist[mvP->ref];

  587.     if (mvC->ref == NOT_AVAIL || (nP == MV_FWD_X3) || (nP == MV_BWD_X3 ))

  588.         mvC = &h->mv[nP - 5];  // set to top-left (mvD)

  589.     if (mode == MV_PRED_PSKIP &&

  590.         (mvA->ref == NOT_AVAIL ||

  591.          mvB->ref == NOT_AVAIL ||

  592.          (mvA->x | mvA->y | mvA->ref) == 0 ||

  593.          (mvB->x | mvB->y | mvB->ref) == 0)) {

  594.         mvP2 = &un_mv;

  595.     /* if there is only one suitable candidate, take it */

  596.     } else if (mvA->ref >= 0 && mvB->ref < 0  && mvC->ref < 0) {

  597.         mvP2 = mvA;

  598.     } else if (mvA->ref < 0  && mvB->ref >= 0 && mvC->ref < 0) {

  599.         mvP2 = mvB;

  600.     } else if (mvA->ref < 0  && mvB->ref < 0  && mvC->ref >= 0) {

  601.         mvP2 = mvC;

  602.     } else if (mode == MV_PRED_LEFT     && mvA->ref == ref) {

  603.         mvP2 = mvA;

  604.     } else if (mode == MV_PRED_TOP      && mvB->ref == ref) {

  605.         mvP2 = mvB;

  606.     } else if (mode == MV_PRED_TOPRIGHT && mvC->ref == ref) {

  607.         mvP2 = mvC;

  608.     }

  609.     if (mvP2) {

  610.         mvP->x = mvP2->x;

  611.         mvP->y = mvP2->y;

  612.     } else

  613.         mv_pred_median(h, mvP, mvA, mvB, mvC);

  614. 

  615.     if (mode < MV_PRED_PSKIP) {

  616.         mvP->x += get_se_golomb(&h->gb);

  617.         mvP->y += get_se_golomb(&h->gb);

  618.     }

  619.     set_mvs(mvP, size);

  620. }

  621. 

  622. /*****************************************************************************

  623.  *

  624.  * macroblock level

  625.  *

  626.  ****************************************************************************/

  627. 

  628. /**

  629.  * initialise predictors for motion vectors and intra prediction

  630.  */

  631. void ff_cavs_init_mb(AVSContext *h)

  632. {

  633.     int i;

  634. 

  635.     /* copy predictors from top line (MB B and C) into cache */

  636.     for (i = 0; i < 3; i++) {

  637.         h->mv[MV_FWD_B2 + i] = h->top_mv[0][h->mbx * 2 + i];

  638.         h->mv[MV_BWD_B2 + i] = h->top_mv[1][h->mbx * 2 + i];

  639.     }

  640.     h->pred_mode_Y[1] = h->top_pred_Y[h->mbx * 2 + 0];

  641.     h->pred_mode_Y[2] = h->top_pred_Y[h->mbx * 2 + 1];

  642.     /* clear top predictors if MB B is not available */

  643.     if (!(h->flags & B_AVAIL)) {

  644.         h->mv[MV_FWD_B2]  = un_mv;

  645.         h->mv[MV_FWD_B3]  = un_mv;

  646.         h->mv[MV_BWD_B2]  = un_mv;

  647.         h->mv[MV_BWD_B3]  = un_mv;

  648.         h->pred_mode_Y[1] = h->pred_mode_Y[2] = NOT_AVAIL;

  649.         h->flags         &= ~(C_AVAIL | D_AVAIL);

  650.     } else if (h->mbx) {

  651.         h->flags |= D_AVAIL;

  652.     }

  653.     if (h->mbx == h->mb_width - 1) // MB C not available

  654.         h->flags &= ~C_AVAIL;

  655.     /* clear top-right predictors if MB C is not available */

  656.     if (!(h->flags & C_AVAIL)) {

  657.         h->mv[MV_FWD_C2] = un_mv;

  658.         h->mv[MV_BWD_C2] = un_mv;

  659.     }

  660.     /* clear top-left predictors if MB D is not available */

  661.     if (!(h->flags & D_AVAIL)) {

  662.         h->mv[MV_FWD_D3] = un_mv;

  663.         h->mv[MV_BWD_D3] = un_mv;

  664.     }

  665. }

  666. 

  667. /**

  668.  * save predictors for later macroblocks and increase

  669.  * macroblock address

  670.  * @return 0 if end of frame is reached, 1 otherwise

  671.  */

  672. int ff_cavs_next_mb(AVSContext *h)

  673. {

  674.     int i;

  675. 

  676.     h->flags |= A_AVAIL;

  677.     h->cy    += 16;

  678.     h->cu    += 8;

  679.     h->cv    += 8;

  680.     /* copy mvs as predictors to the left */

  681.     for (i = 0; i <= 20; i += 4)

  682.         h->mv[i] = h->mv[i + 2];

  683.     /* copy bottom mvs from cache to top line */

  684.     h->top_mv[0][h->mbx * 2 + 0] = h->mv[MV_FWD_X2];

  685.     h->top_mv[0][h->mbx * 2 + 1] = h->mv[MV_FWD_X3];

  686.     h->top_mv[1][h->mbx * 2 + 0] = h->mv[MV_BWD_X2];

  687.     h->top_mv[1][h->mbx * 2 + 1] = h->mv[MV_BWD_X3];

  688.     /* next MB address */

  689.     h->mbidx++;

  690.     h->mbx++;

  691.     if (h->mbx == h->mb_width) { // New mb line

  692.         h->flags = B_AVAIL | C_AVAIL;

  693.         /* clear left pred_modes */

  694.         h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;

  695.         /* clear left mv predictors */

  696.         for (i = 0; i <= 20; i += 4)

  697.             h->mv[i] = un_mv;

  698.         h->mbx = 0;

  699.         h->mby++;

  700.         /* re-calculate sample pointers */

  701.         h->cy = h->cur.f->data[0] + h->mby * 16 * h->l_stride;

  702.         h->cu = h->cur.f->data[1] + h->mby * 8 * h->c_stride;

  703.         h->cv = h->cur.f->data[2] + h->mby * 8 * h->c_stride;

  704.         if (h->mby == h->mb_height) { // Frame end

  705.             return 0;

  706.         }

  707.     }

  708.     return 1;

  709. }

  710. 

  711. /*****************************************************************************

  712.  *

  713.  * frame level

  714.  *

  715.  ****************************************************************************/

  716. 

  717. int ff_cavs_init_pic(AVSContext *h)

  718. {

  719.     int i;

  720. 

  721.     /* clear some predictors */

  722.     for (i = 0; i <= 20; i += 4)

  723.         h->mv[i] = un_mv;

  724.     h->mv[MV_BWD_X0] = ff_cavs_dir_mv;

  725.     set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);

  726.     h->mv[MV_FWD_X0] = ff_cavs_dir_mv;

  727.     set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);

  728.     h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;

  729.     h->cy             = h->cur.f->data[0];

  730.     h->cu             = h->cur.f->data[1];

  731.     h->cv             = h->cur.f->data[2];

  732.     h->l_stride       = h->cur.f->linesize[0];

  733.     h->c_stride       = h->cur.f->linesize[1];

  734.     h->luma_scan[2]   = 8 * h->l_stride;

  735.     h->luma_scan[3]   = 8 * h->l_stride + 8;

  736.     h->mbx            = h->mby = h->mbidx = 0;

  737.     h->flags          = 0;

  738. 

  739.     return 0;

  740. }

  741. 

  742. /*****************************************************************************

  743.  *

  744.  * headers and interface

  745.  *

  746.  ****************************************************************************/

  747. 

  748. /**

  749.  * some predictions require data from the top-neighbouring macroblock.

  750.  * this data has to be stored for one complete row of macroblocks

  751.  * and this storage space is allocated here

  752.  */

  753. void ff_cavs_init_top_lines(AVSContext *h)

  754. {

  755.     /* alloc top line of predictors */

  756.     h->top_qp       = av_mallocz(h->mb_width);

  757.     h->top_mv[0]    = av_mallocz_array(h->mb_width * 2 + 1,  sizeof(cavs_vector));

  758.     h->top_mv[1]    = av_mallocz_array(h->mb_width * 2 + 1,  sizeof(cavs_vector));

  759.     h->top_pred_Y   = av_mallocz_array(h->mb_width * 2,  sizeof(*h->top_pred_Y));

  760.     h->top_border_y = av_mallocz_array(h->mb_width + 1,  16);

  761.     h->top_border_u = av_mallocz_array(h->mb_width,  10);

  762.     h->top_border_v = av_mallocz_array(h->mb_width,  10);

  763. 

  764.     /* alloc space for co-located MVs and types */

  765.     h->col_mv        = av_mallocz_array(h->mb_width * h->mb_height,

  766.                                         4 * sizeof(cavs_vector));

  767.     h->col_type_base = av_mallocz(h->mb_width * h->mb_height);

  768.     h->block         = av_mallocz(64 * sizeof(int16_t));

  769. }

  770. 

  771. av_cold int ff_cavs_init(AVCodecContext *avctx)

  772. {

  773.     AVSContext *h = avctx->priv_data;

  774. 

  775.     ff_blockdsp_init(&h->bdsp, avctx);

  776.     ff_h264chroma_init(&h->h264chroma, 8);

  777.     ff_idctdsp_init(&h->idsp, avctx);

  778.     ff_videodsp_init(&h->vdsp, 8);

  779.     ff_cavsdsp_init(&h->cdsp, avctx);

  780.     ff_init_scantable_permutation(h->idsp.idct_permutation,

  781.                                   h->cdsp.idct_perm);

  782.     ff_init_scantable(h->idsp.idct_permutation, &h->scantable, ff_zigzag_direct);

  783. 

  784.     h->avctx       = avctx;

  785.     avctx->pix_fmt = AV_PIX_FMT_YUV420P;

  786. 

  787.     h->cur.f    = av_frame_alloc();

  788.     h->DPB[0].f = av_frame_alloc();

  789.     h->DPB[1].f = av_frame_alloc();

  790.     if (!h->cur.f || !h->DPB[0].f || !h->DPB[1].f) {

  791.         ff_cavs_end(avctx);

  792.         return AVERROR(ENOMEM);

  793.     }

  794. 

  795.     h->luma_scan[0]                     = 0;

  796.     h->luma_scan[1]                     = 8;

  797.     h->intra_pred_l[INTRA_L_VERT]       = intra_pred_vert;

  798.     h->intra_pred_l[INTRA_L_HORIZ]      = intra_pred_horiz;

  799.     h->intra_pred_l[INTRA_L_LP]         = intra_pred_lp;

  800.     h->intra_pred_l[INTRA_L_DOWN_LEFT]  = intra_pred_down_left;

  801.     h->intra_pred_l[INTRA_L_DOWN_RIGHT] = intra_pred_down_right;

  802.     h->intra_pred_l[INTRA_L_LP_LEFT]    = intra_pred_lp_left;

  803.     h->intra_pred_l[INTRA_L_LP_TOP]     = intra_pred_lp_top;

  804.     h->intra_pred_l[INTRA_L_DC_128]     = intra_pred_dc_128;

  805.     h->intra_pred_c[INTRA_C_LP]         = intra_pred_lp;

  806.     h->intra_pred_c[INTRA_C_HORIZ]      = intra_pred_horiz;

  807.     h->intra_pred_c[INTRA_C_VERT]       = intra_pred_vert;

  808.     h->intra_pred_c[INTRA_C_PLANE]      = intra_pred_plane;

  809.     h->intra_pred_c[INTRA_C_LP_LEFT]    = intra_pred_lp_left;

  810.     h->intra_pred_c[INTRA_C_LP_TOP]     = intra_pred_lp_top;

  811.     h->intra_pred_c[INTRA_C_DC_128]     = intra_pred_dc_128;

  812.     h->mv[7]                            = un_mv;

  813.     h->mv[19]                           = un_mv;

  814.     return 0;

  815. }

  816. 

  817. av_cold int ff_cavs_end(AVCodecContext *avctx)

  818. {

  819.     AVSContext *h = avctx->priv_data;

  820. 

  821.     av_frame_free(&h->cur.f);

  822.     av_frame_free(&h->DPB[0].f);

  823.     av_frame_free(&h->DPB[1].f);

  824. 

  825.     av_free(h->top_qp);

  826.     av_free(h->top_mv[0]);

  827.     av_free(h->top_mv[1]);

  828.     av_free(h->top_pred_Y);

  829.     av_free(h->top_border_y);

  830.     av_free(h->top_border_u);

  831.     av_free(h->top_border_v);

  832.     av_free(h->col_mv);

  833.     av_free(h->col_type_base);

  834.     av_free(h->block);

  835.     av_freep(&h->edge_emu_buffer);

  836.     return 0;

  837. }