av1/common/blockd.c - aom - Git at Google

 /*
  * Copyright (c) 2016, Alliance for Open Media. All rights reserved
  *
  * This source code is subject to the terms of the BSD 2 Clause License and
  * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
  * was not distributed with this source code in the LICENSE file, you can
  * obtain it at www.aomedia.org/license/software. If the Alliance for Open
  * Media Patent License 1.0 was not distributed with this source code in the
  * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
  */

 #include <math.h>

 #include "aom_ports/system_state.h"

 #include "av1/common/blockd.h"
 #include "av1/common/onyxc_int.h"

 PREDICTION_MODE av1_left_block_mode(const MODE_INFO *cur_mi,
                                     const MODE_INFO *left_mi, int b) {
   if (b == 0 || b == 2) {
     if (!left_mi || is_inter_block(&left_mi->mbmi)) return DC_PRED;

     return get_y_mode(left_mi, b + 1);
   } else {
     assert(b == 1 || b == 3);
     return cur_mi->bmi[b - 1].as_mode;
   }
 }

 PREDICTION_MODE av1_above_block_mode(const MODE_INFO *cur_mi,
                                      const MODE_INFO *above_mi, int b) {
   if (b == 0 || b == 1) {
     if (!above_mi || is_inter_block(&above_mi->mbmi)) return DC_PRED;

     return get_y_mode(above_mi, b + 2);
   } else {
     assert(b == 2 || b == 3);
     return cur_mi->bmi[b - 2].as_mode;
   }
 }

 void av1_foreach_transformed_block_in_plane(
     const MACROBLOCKD *const xd, BLOCK_SIZE bsize, int plane,
     foreach_transformed_block_visitor visit, void *arg) {
   const struct macroblockd_plane *const pd = &xd->plane[plane];
   // block and transform sizes, in number of 4x4 blocks log 2 ("*_b")
   // 4x4=0, 8x8=2, 16x16=4, 32x32=6, 64x64=8
   // transform size varies per plane, look it up in a common way.
   const TX_SIZE tx_size = av1_get_tx_size(plane, xd);
   const BLOCK_SIZE plane_bsize =
       AOMMAX(BLOCK_4X4, get_plane_block_size(bsize, pd));
   const uint8_t txw_unit = tx_size_wide_unit[tx_size];
   const uint8_t txh_unit = tx_size_high_unit[tx_size];
   const int step = txw_unit * txh_unit;
   int i = 0, r, c;

   // If mb_to_right_edge is < 0 we are in a situation in which
   // the current block size extends into the UMV and we won't
   // visit the sub blocks that are wholly within the UMV.
   const int max_blocks_wide = max_block_wide(xd, plane_bsize, plane);
   const int max_blocks_high = max_block_high(xd, plane_bsize, plane);

   int blk_row, blk_col;

   const BLOCK_SIZE max_unit_bsize = get_plane_block_size(BLOCK_64X64, pd);
   int mu_blocks_wide = block_size_wide[max_unit_bsize] >> tx_size_wide_log2[0];
   int mu_blocks_high = block_size_high[max_unit_bsize] >> tx_size_high_log2[0];
   mu_blocks_wide = AOMMIN(max_blocks_wide, mu_blocks_wide);
   mu_blocks_high = AOMMIN(max_blocks_high, mu_blocks_high);

   // Keep track of the row and column of the blocks we use so that we know
   // if we are in the unrestricted motion border.
   for (r = 0; r < max_blocks_high; r += mu_blocks_high) {
     const int unit_height = AOMMIN(mu_blocks_high + r, max_blocks_high);
     // Skip visiting the sub blocks that are wholly within the UMV.
     for (c = 0; c < max_blocks_wide; c += mu_blocks_wide) {
       const int unit_width = AOMMIN(mu_blocks_wide + c, max_blocks_wide);
       for (blk_row = r; blk_row < unit_height; blk_row += txh_unit) {
         for (blk_col = c; blk_col < unit_width; blk_col += txw_unit) {
           visit(plane, i, blk_row, blk_col, plane_bsize, tx_size, arg);
           i += step;
         }
       }
     }
   }
 }

 #if CONFIG_LV_MAP
 void av1_foreach_transformed_block(const MACROBLOCKD *const xd,
                                    BLOCK_SIZE bsize, int mi_row, int mi_col,
                                    foreach_transformed_block_visitor visit,
                                    void *arg) {
   int plane;

   for (plane = 0; plane < MAX_MB_PLANE; ++plane) {
     if (!is_chroma_reference(mi_row, mi_col, bsize,
                              xd->plane[plane].subsampling_x,
                              xd->plane[plane].subsampling_y))
       continue;
     av1_foreach_transformed_block_in_plane(xd, bsize, plane, visit, arg);
   }
 }
 #endif

 void av1_set_contexts(const MACROBLOCKD *xd, struct macroblockd_plane *pd,
                       int plane, TX_SIZE tx_size, int has_eob, int aoff,
                       int loff) {
   ENTROPY_CONTEXT *const a = pd->above_context + aoff;
   ENTROPY_CONTEXT *const l = pd->left_context + loff;
   const int txs_wide = tx_size_wide_unit[tx_size];
   const int txs_high = tx_size_high_unit[tx_size];
   const BLOCK_SIZE bsize = xd->mi[0]->mbmi.sb_type;
   const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, pd);

   // above
   if (has_eob && xd->mb_to_right_edge < 0) {
     int i;
     const int blocks_wide = max_block_wide(xd, plane_bsize, plane);
     int above_contexts = txs_wide;
     if (above_contexts + aoff > blocks_wide)
       above_contexts = blocks_wide - aoff;

     for (i = 0; i < above_contexts; ++i) a[i] = has_eob;
     for (i = above_contexts; i < txs_wide; ++i) a[i] = 0;
   } else {
     memset(a, has_eob, sizeof(ENTROPY_CONTEXT) * txs_wide);
   }

   // left
   if (has_eob && xd->mb_to_bottom_edge < 0) {
     int i;
     const int blocks_high = max_block_high(xd, plane_bsize, plane);
     int left_contexts = txs_high;
     if (left_contexts + loff > blocks_high) left_contexts = blocks_high - loff;

     for (i = 0; i < left_contexts; ++i) l[i] = has_eob;
     for (i = left_contexts; i < txs_high; ++i) l[i] = 0;
   } else {
     memset(l, has_eob, sizeof(ENTROPY_CONTEXT) * txs_high);
   }
 }
 void av1_reset_skip_context(MACROBLOCKD *xd, int mi_row, int mi_col,
                             BLOCK_SIZE bsize) {
   int i;
   int nplanes;
   int chroma_ref;
   chroma_ref =
       is_chroma_reference(mi_row, mi_col, bsize, xd->plane[1].subsampling_x,
                           xd->plane[1].subsampling_y);
   nplanes = 1 + (MAX_MB_PLANE - 1) * chroma_ref;
   for (i = 0; i < nplanes; i++) {
     struct macroblockd_plane *const pd = &xd->plane[i];
     const BLOCK_SIZE plane_bsize =
         AOMMAX(BLOCK_4X4, get_plane_block_size(bsize, pd));
     const int txs_wide = block_size_wide[plane_bsize] >> tx_size_wide_log2[0];
     const int txs_high = block_size_high[plane_bsize] >> tx_size_high_log2[0];
     memset(pd->above_context, 0, sizeof(ENTROPY_CONTEXT) * txs_wide);
     memset(pd->left_context, 0, sizeof(ENTROPY_CONTEXT) * txs_high);
   }
 }

 void av1_setup_block_planes(MACROBLOCKD *xd, int ss_x, int ss_y) {
   int i;

   for (i = 0; i < MAX_MB_PLANE; i++) {
     xd->plane[i].plane_type = get_plane_type(i);
     xd->plane[i].subsampling_x = i ? ss_x : 0;
     xd->plane[i].subsampling_y = i ? ss_y : 0;
   }
 }

 #if CONFIG_EXT_INTRA
 const int16_t dr_intra_derivative[90] = {
   1,    14666, 7330, 4884, 3660, 2926, 2435, 2084, 1821, 1616, 1451, 1317, 1204,
   1108, 1026,  955,  892,  837,  787,  743,  703,  666,  633,  603,  574,  548,
   524,  502,   481,  461,  443,  426,  409,  394,  379,  365,  352,  339,  327,
   316,  305,   294,  284,  274,  265,  256,  247,  238,  230,  222,  214,  207,
   200,  192,   185,  179,  172,  166,  159,  153,  147,  141,  136,  130,  124,
   119,  113,   108,  103,  98,   93,   88,   83,   78,   73,   68,   63,   59,
   54,   49,    45,   40,   35,   31,   26,   22,   17,   13,   8,    4,
 };
 #endif  // CONFIG_EXT_INTRA
	/*
	* Copyright (c) 2016, Alliance for Open Media. All rights reserved
	*
	* This source code is subject to the terms of the BSD 2 Clause License and
	* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
	* was not distributed with this source code in the LICENSE file, you can
	* obtain it at www.aomedia.org/license/software. If the Alliance for Open
	* Media Patent License 1.0 was not distributed with this source code in the
	* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
	*/

	#include <math.h>

	#include "aom_ports/system_state.h"

	#include "av1/common/blockd.h"
	#include "av1/common/onyxc_int.h"

	PREDICTION_MODE av1_left_block_mode(const MODE_INFO *cur_mi,
	const MODE_INFO *left_mi, int b) {
	if (b == 0 \|\| b == 2) {
	if (!left_mi \|\| is_inter_block(&left_mi->mbmi)) return DC_PRED;

	return get_y_mode(left_mi, b + 1);
	} else {
	assert(b == 1 \|\| b == 3);
	return cur_mi->bmi[b - 1].as_mode;
	}
	}

	PREDICTION_MODE av1_above_block_mode(const MODE_INFO *cur_mi,
	const MODE_INFO *above_mi, int b) {
	if (b == 0 \|\| b == 1) {
	if (!above_mi \|\| is_inter_block(&above_mi->mbmi)) return DC_PRED;

	return get_y_mode(above_mi, b + 2);
	} else {
	assert(b == 2 \|\| b == 3);
	return cur_mi->bmi[b - 2].as_mode;
	}
	}

	void av1_foreach_transformed_block_in_plane(
	const MACROBLOCKD *const xd, BLOCK_SIZE bsize, int plane,
	foreach_transformed_block_visitor visit, void *arg) {
	const struct macroblockd_plane *const pd = &xd->plane[plane];
	// block and transform sizes, in number of 4x4 blocks log 2 ("*_b")
	// 4x4=0, 8x8=2, 16x16=4, 32x32=6, 64x64=8
	// transform size varies per plane, look it up in a common way.
	const TX_SIZE tx_size = av1_get_tx_size(plane, xd);
	const BLOCK_SIZE plane_bsize =
	AOMMAX(BLOCK_4X4, get_plane_block_size(bsize, pd));
	const uint8_t txw_unit = tx_size_wide_unit[tx_size];
	const uint8_t txh_unit = tx_size_high_unit[tx_size];
	const int step = txw_unit * txh_unit;
	int i = 0, r, c;

	// If mb_to_right_edge is < 0 we are in a situation in which
	// the current block size extends into the UMV and we won't
	// visit the sub blocks that are wholly within the UMV.
	const int max_blocks_wide = max_block_wide(xd, plane_bsize, plane);
	const int max_blocks_high = max_block_high(xd, plane_bsize, plane);

	int blk_row, blk_col;

	const BLOCK_SIZE max_unit_bsize = get_plane_block_size(BLOCK_64X64, pd);
	int mu_blocks_wide = block_size_wide[max_unit_bsize] >> tx_size_wide_log2[0];
	int mu_blocks_high = block_size_high[max_unit_bsize] >> tx_size_high_log2[0];
	mu_blocks_wide = AOMMIN(max_blocks_wide, mu_blocks_wide);
	mu_blocks_high = AOMMIN(max_blocks_high, mu_blocks_high);

	// Keep track of the row and column of the blocks we use so that we know
	// if we are in the unrestricted motion border.
	for (r = 0; r < max_blocks_high; r += mu_blocks_high) {
	const int unit_height = AOMMIN(mu_blocks_high + r, max_blocks_high);
	// Skip visiting the sub blocks that are wholly within the UMV.
	for (c = 0; c < max_blocks_wide; c += mu_blocks_wide) {
	const int unit_width = AOMMIN(mu_blocks_wide + c, max_blocks_wide);
	for (blk_row = r; blk_row < unit_height; blk_row += txh_unit) {
	for (blk_col = c; blk_col < unit_width; blk_col += txw_unit) {
	visit(plane, i, blk_row, blk_col, plane_bsize, tx_size, arg);
	i += step;
	}
	}
	}
	}
	}

	#if CONFIG_LV_MAP
	void av1_foreach_transformed_block(const MACROBLOCKD *const xd,
	BLOCK_SIZE bsize, int mi_row, int mi_col,
	foreach_transformed_block_visitor visit,
	void *arg) {
	int plane;

	for (plane = 0; plane < MAX_MB_PLANE; ++plane) {
	if (!is_chroma_reference(mi_row, mi_col, bsize,
	xd->plane[plane].subsampling_x,
	xd->plane[plane].subsampling_y))
	continue;
	av1_foreach_transformed_block_in_plane(xd, bsize, plane, visit, arg);
	}
	}
	#endif

	void av1_set_contexts(const MACROBLOCKD xd, struct macroblockd_plane pd,
	int plane, TX_SIZE tx_size, int has_eob, int aoff,
	int loff) {
	ENTROPY_CONTEXT *const a = pd->above_context + aoff;
	ENTROPY_CONTEXT *const l = pd->left_context + loff;
	const int txs_wide = tx_size_wide_unit[tx_size];
	const int txs_high = tx_size_high_unit[tx_size];
	const BLOCK_SIZE bsize = xd->mi[0]->mbmi.sb_type;
	const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, pd);

	// above
	if (has_eob && xd->mb_to_right_edge < 0) {
	int i;
	const int blocks_wide = max_block_wide(xd, plane_bsize, plane);
	int above_contexts = txs_wide;
	if (above_contexts + aoff > blocks_wide)
	above_contexts = blocks_wide - aoff;

	for (i = 0; i < above_contexts; ++i) a[i] = has_eob;
	for (i = above_contexts; i < txs_wide; ++i) a[i] = 0;
	} else {
	memset(a, has_eob, sizeof(ENTROPY_CONTEXT) * txs_wide);
	}

	// left
	if (has_eob && xd->mb_to_bottom_edge < 0) {
	int i;
	const int blocks_high = max_block_high(xd, plane_bsize, plane);
	int left_contexts = txs_high;
	if (left_contexts + loff > blocks_high) left_contexts = blocks_high - loff;

	for (i = 0; i < left_contexts; ++i) l[i] = has_eob;
	for (i = left_contexts; i < txs_high; ++i) l[i] = 0;
	} else {
	memset(l, has_eob, sizeof(ENTROPY_CONTEXT) * txs_high);
	}
	}
	void av1_reset_skip_context(MACROBLOCKD *xd, int mi_row, int mi_col,
	BLOCK_SIZE bsize) {
	int i;
	int nplanes;
	int chroma_ref;
	chroma_ref =
	is_chroma_reference(mi_row, mi_col, bsize, xd->plane[1].subsampling_x,
	xd->plane[1].subsampling_y);
	nplanes = 1 + (MAX_MB_PLANE - 1) * chroma_ref;
	for (i = 0; i < nplanes; i++) {
	struct macroblockd_plane *const pd = &xd->plane[i];
	const BLOCK_SIZE plane_bsize =
	AOMMAX(BLOCK_4X4, get_plane_block_size(bsize, pd));
	const int txs_wide = block_size_wide[plane_bsize] >> tx_size_wide_log2[0];
	const int txs_high = block_size_high[plane_bsize] >> tx_size_high_log2[0];
	memset(pd->above_context, 0, sizeof(ENTROPY_CONTEXT) * txs_wide);
	memset(pd->left_context, 0, sizeof(ENTROPY_CONTEXT) * txs_high);
	}
	}

	void av1_setup_block_planes(MACROBLOCKD *xd, int ss_x, int ss_y) {
	int i;

	for (i = 0; i < MAX_MB_PLANE; i++) {
	xd->plane[i].plane_type = get_plane_type(i);
	xd->plane[i].subsampling_x = i ? ss_x : 0;
	xd->plane[i].subsampling_y = i ? ss_y : 0;
	}
	}

	#if CONFIG_EXT_INTRA
	const int16_t dr_intra_derivative[90] = {
	1, 14666, 7330, 4884, 3660, 2926, 2435, 2084, 1821, 1616, 1451, 1317, 1204,
	1108, 1026, 955, 892, 837, 787, 743, 703, 666, 633, 603, 574, 548,
	524, 502, 481, 461, 443, 426, 409, 394, 379, 365, 352, 339, 327,
	316, 305, 294, 284, 274, 265, 256, 247, 238, 230, 222, 214, 207,
	200, 192, 185, 179, 172, 166, 159, 153, 147, 141, 136, 130, 124,
	119, 113, 108, 103, 98, 93, 88, 83, 78, 73, 68, 63, 59,
	54, 49, 45, 40, 35, 31, 26, 22, 17, 13, 8, 4,
	};
	#endif // CONFIG_EXT_INTRA