michael@0: /*
michael@0:  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
michael@0:  *
michael@0:  *  Use of this source code is governed by a BSD-style license
michael@0:  *  that can be found in the LICENSE file in the root of the source
michael@0:  *  tree. An additional intellectual property rights grant can be found
michael@0:  *  in the file PATENTS.  All contributing project authors may
michael@0:  *  be found in the AUTHORS file in the root of the source tree.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #ifndef VP9_COMMON_VP9_BLOCKD_H_
michael@0: #define VP9_COMMON_VP9_BLOCKD_H_
michael@0: 
michael@0: #include "./vpx_config.h"
michael@0: 
michael@0: #include "vpx_ports/mem.h"
michael@0: #include "vpx_scale/yv12config.h"
michael@0: 
michael@0: #include "vp9/common/vp9_common.h"
michael@0: #include "vp9/common/vp9_common_data.h"
michael@0: #include "vp9/common/vp9_enums.h"
michael@0: #include "vp9/common/vp9_filter.h"
michael@0: #include "vp9/common/vp9_mv.h"
michael@0: #include "vp9/common/vp9_scale.h"
michael@0: #include "vp9/common/vp9_seg_common.h"
michael@0: #include "vp9/common/vp9_treecoder.h"
michael@0: 
michael@0: #define BLOCK_SIZE_GROUPS   4
michael@0: #define MBSKIP_CONTEXTS 3
michael@0: 
michael@0: /* Segment Feature Masks */
michael@0: #define MAX_MV_REF_CANDIDATES 2
michael@0: 
michael@0: #define INTRA_INTER_CONTEXTS 4
michael@0: #define COMP_INTER_CONTEXTS 5
michael@0: #define REF_CONTEXTS 5
michael@0: 
michael@0: typedef enum {
michael@0:   PLANE_TYPE_Y_WITH_DC,
michael@0:   PLANE_TYPE_UV,
michael@0: } PLANE_TYPE;
michael@0: 
michael@0: typedef char ENTROPY_CONTEXT;
michael@0: 
michael@0: typedef char PARTITION_CONTEXT;
michael@0: 
michael@0: static INLINE int combine_entropy_contexts(ENTROPY_CONTEXT a,
michael@0:                                            ENTROPY_CONTEXT b) {
michael@0:   return (a != 0) + (b != 0);
michael@0: }
michael@0: 
michael@0: typedef enum {
michael@0:   KEY_FRAME = 0,
michael@0:   INTER_FRAME = 1,
michael@0:   FRAME_TYPES,
michael@0: } FRAME_TYPE;
michael@0: 
michael@0: typedef enum {
michael@0:   DC_PRED,         // Average of above and left pixels
michael@0:   V_PRED,          // Vertical
michael@0:   H_PRED,          // Horizontal
michael@0:   D45_PRED,        // Directional 45  deg = round(arctan(1/1) * 180/pi)
michael@0:   D135_PRED,       // Directional 135 deg = 180 - 45
michael@0:   D117_PRED,       // Directional 117 deg = 180 - 63
michael@0:   D153_PRED,       // Directional 153 deg = 180 - 27
michael@0:   D207_PRED,       // Directional 207 deg = 180 + 27
michael@0:   D63_PRED,        // Directional 63  deg = round(arctan(2/1) * 180/pi)
michael@0:   TM_PRED,         // True-motion
michael@0:   NEARESTMV,
michael@0:   NEARMV,
michael@0:   ZEROMV,
michael@0:   NEWMV,
michael@0:   MB_MODE_COUNT
michael@0: } MB_PREDICTION_MODE;
michael@0: 
michael@0: static INLINE int is_inter_mode(MB_PREDICTION_MODE mode) {
michael@0:   return mode >= NEARESTMV && mode <= NEWMV;
michael@0: }
michael@0: 
michael@0: #define INTRA_MODES (TM_PRED + 1)
michael@0: 
michael@0: #define INTER_MODES (1 + NEWMV - NEARESTMV)
michael@0: 
michael@0: #define INTER_OFFSET(mode) ((mode) - NEARESTMV)
michael@0: 
michael@0: 
michael@0: /* For keyframes, intra block modes are predicted by the (already decoded)
michael@0:    modes for the Y blocks to the left and above us; for interframes, there
michael@0:    is a single probability table. */
michael@0: 
michael@0: typedef struct {
michael@0:   MB_PREDICTION_MODE as_mode;
michael@0:   int_mv as_mv[2];  // first, second inter predictor motion vectors
michael@0: } b_mode_info;
michael@0: 
michael@0: typedef enum {
michael@0:   NONE = -1,
michael@0:   INTRA_FRAME = 0,
michael@0:   LAST_FRAME = 1,
michael@0:   GOLDEN_FRAME = 2,
michael@0:   ALTREF_FRAME = 3,
michael@0:   MAX_REF_FRAMES = 4
michael@0: } MV_REFERENCE_FRAME;
michael@0: 
michael@0: static INLINE int b_width_log2(BLOCK_SIZE sb_type) {
michael@0:   return b_width_log2_lookup[sb_type];
michael@0: }
michael@0: static INLINE int b_height_log2(BLOCK_SIZE sb_type) {
michael@0:   return b_height_log2_lookup[sb_type];
michael@0: }
michael@0: 
michael@0: static INLINE int mi_width_log2(BLOCK_SIZE sb_type) {
michael@0:   return mi_width_log2_lookup[sb_type];
michael@0: }
michael@0: 
michael@0: static INLINE int mi_height_log2(BLOCK_SIZE sb_type) {
michael@0:   return mi_height_log2_lookup[sb_type];
michael@0: }
michael@0: 
michael@0: // This structure now relates to 8x8 block regions.
michael@0: typedef struct {
michael@0:   MB_PREDICTION_MODE mode, uv_mode;
michael@0:   MV_REFERENCE_FRAME ref_frame[2];
michael@0:   TX_SIZE tx_size;
michael@0:   int_mv mv[2];                // for each reference frame used
michael@0:   int_mv ref_mvs[MAX_REF_FRAMES][MAX_MV_REF_CANDIDATES];
michael@0:   int_mv best_mv[2];
michael@0: 
michael@0:   uint8_t mode_context[MAX_REF_FRAMES];
michael@0: 
michael@0:   unsigned char skip_coeff;    // 0=need to decode coeffs, 1=no coefficients
michael@0:   unsigned char segment_id;    // Segment id for this block.
michael@0: 
michael@0:   // Flags used for prediction status of various bit-stream signals
michael@0:   unsigned char seg_id_predicted;
michael@0: 
michael@0:   INTERPOLATION_TYPE interp_filter;
michael@0: 
michael@0:   BLOCK_SIZE sb_type;
michael@0: } MB_MODE_INFO;
michael@0: 
michael@0: typedef struct {
michael@0:   MB_MODE_INFO mbmi;
michael@0:   b_mode_info bmi[4];
michael@0: } MODE_INFO;
michael@0: 
michael@0: static INLINE int is_inter_block(const MB_MODE_INFO *mbmi) {
michael@0:   return mbmi->ref_frame[0] > INTRA_FRAME;
michael@0: }
michael@0: 
michael@0: static INLINE int has_second_ref(const MB_MODE_INFO *mbmi) {
michael@0:   return mbmi->ref_frame[1] > INTRA_FRAME;
michael@0: }
michael@0: 
michael@0: enum mv_precision {
michael@0:   MV_PRECISION_Q3,
michael@0:   MV_PRECISION_Q4
michael@0: };
michael@0: 
michael@0: #if CONFIG_ALPHA
michael@0: enum { MAX_MB_PLANE = 4 };
michael@0: #else
michael@0: enum { MAX_MB_PLANE = 3 };
michael@0: #endif
michael@0: 
michael@0: struct buf_2d {
michael@0:   uint8_t *buf;
michael@0:   int stride;
michael@0: };
michael@0: 
michael@0: struct macroblockd_plane {
michael@0:   int16_t *qcoeff;
michael@0:   int16_t *dqcoeff;
michael@0:   uint16_t *eobs;
michael@0:   PLANE_TYPE plane_type;
michael@0:   int subsampling_x;
michael@0:   int subsampling_y;
michael@0:   struct buf_2d dst;
michael@0:   struct buf_2d pre[2];
michael@0:   int16_t *dequant;
michael@0:   ENTROPY_CONTEXT *above_context;
michael@0:   ENTROPY_CONTEXT *left_context;
michael@0: };
michael@0: 
michael@0: #define BLOCK_OFFSET(x, i) ((x) + (i) * 16)
michael@0: 
michael@0: typedef struct macroblockd {
michael@0:   struct macroblockd_plane plane[MAX_MB_PLANE];
michael@0: 
michael@0:   struct scale_factors scale_factor[2];
michael@0: 
michael@0:   MODE_INFO *last_mi;
michael@0:   int mode_info_stride;
michael@0: 
michael@0:   // A NULL indicates that the 8x8 is not part of the image
michael@0:   MODE_INFO **mi_8x8;
michael@0:   MODE_INFO **prev_mi_8x8;
michael@0:   MODE_INFO *mi_stream;
michael@0: 
michael@0:   int up_available;
michael@0:   int left_available;
michael@0: 
michael@0:   /* Distance of MB away from frame edges */
michael@0:   int mb_to_left_edge;
michael@0:   int mb_to_right_edge;
michael@0:   int mb_to_top_edge;
michael@0:   int mb_to_bottom_edge;
michael@0: 
michael@0:   int lossless;
michael@0:   /* Inverse transform function pointers. */
michael@0:   void (*itxm_add)(const int16_t *input, uint8_t *dest, int stride, int eob);
michael@0: 
michael@0:   struct subpix_fn_table  subpix;
michael@0: 
michael@0:   int corrupted;
michael@0: 
michael@0:   /* Y,U,V,(A) */
michael@0:   ENTROPY_CONTEXT *above_context[MAX_MB_PLANE];
michael@0:   ENTROPY_CONTEXT left_context[MAX_MB_PLANE][16];
michael@0: 
michael@0:   PARTITION_CONTEXT *above_seg_context;
michael@0:   PARTITION_CONTEXT left_seg_context[8];
michael@0: } MACROBLOCKD;
michael@0: 
michael@0: 
michael@0: 
michael@0: static BLOCK_SIZE get_subsize(BLOCK_SIZE bsize, PARTITION_TYPE partition) {
michael@0:   const BLOCK_SIZE subsize = subsize_lookup[partition][bsize];
michael@0:   assert(subsize < BLOCK_SIZES);
michael@0:   return subsize;
michael@0: }
michael@0: 
michael@0: extern const TX_TYPE mode2txfm_map[MB_MODE_COUNT];
michael@0: 
michael@0: static INLINE TX_TYPE get_tx_type_4x4(PLANE_TYPE plane_type,
michael@0:                                       const MACROBLOCKD *xd, int ib) {
michael@0:   const MODE_INFO *const mi = xd->mi_8x8[0];
michael@0:   const MB_MODE_INFO *const mbmi = &mi->mbmi;
michael@0: 
michael@0:   if (plane_type != PLANE_TYPE_Y_WITH_DC ||
michael@0:       xd->lossless ||
michael@0:       is_inter_block(mbmi))
michael@0:     return DCT_DCT;
michael@0: 
michael@0:   return mode2txfm_map[mbmi->sb_type < BLOCK_8X8 ?
michael@0:                        mi->bmi[ib].as_mode : mbmi->mode];
michael@0: }
michael@0: 
michael@0: static INLINE TX_TYPE get_tx_type_8x8(PLANE_TYPE plane_type,
michael@0:                                       const MACROBLOCKD *xd) {
michael@0:   return plane_type == PLANE_TYPE_Y_WITH_DC ?
michael@0:              mode2txfm_map[xd->mi_8x8[0]->mbmi.mode] : DCT_DCT;
michael@0: }
michael@0: 
michael@0: static INLINE TX_TYPE get_tx_type_16x16(PLANE_TYPE plane_type,
michael@0:                                         const MACROBLOCKD *xd) {
michael@0:   return plane_type == PLANE_TYPE_Y_WITH_DC ?
michael@0:              mode2txfm_map[xd->mi_8x8[0]->mbmi.mode] : DCT_DCT;
michael@0: }
michael@0: 
michael@0: static void setup_block_dptrs(MACROBLOCKD *xd, int ss_x, int ss_y) {
michael@0:   int i;
michael@0: 
michael@0:   for (i = 0; i < MAX_MB_PLANE; i++) {
michael@0:     xd->plane[i].plane_type = i ? PLANE_TYPE_UV : PLANE_TYPE_Y_WITH_DC;
michael@0:     xd->plane[i].subsampling_x = i ? ss_x : 0;
michael@0:     xd->plane[i].subsampling_y = i ? ss_y : 0;
michael@0:   }
michael@0: #if CONFIG_ALPHA
michael@0:   // TODO(jkoleszar): Using the Y w/h for now
michael@0:   xd->plane[3].subsampling_x = 0;
michael@0:   xd->plane[3].subsampling_y = 0;
michael@0: #endif
michael@0: }
michael@0: 
michael@0: 
michael@0: static INLINE TX_SIZE get_uv_tx_size(const MB_MODE_INFO *mbmi) {
michael@0:   return MIN(mbmi->tx_size, max_uv_txsize_lookup[mbmi->sb_type]);
michael@0: }
michael@0: 
michael@0: static BLOCK_SIZE get_plane_block_size(BLOCK_SIZE bsize,
michael@0:                                        const struct macroblockd_plane *pd) {
michael@0:   BLOCK_SIZE bs = ss_size_lookup[bsize][pd->subsampling_x][pd->subsampling_y];
michael@0:   assert(bs < BLOCK_SIZES);
michael@0:   return bs;
michael@0: }
michael@0: 
michael@0: static INLINE int plane_block_width(BLOCK_SIZE bsize,
michael@0:                                     const struct macroblockd_plane* plane) {
michael@0:   return 4 << (b_width_log2(bsize) - plane->subsampling_x);
michael@0: }
michael@0: 
michael@0: static INLINE int plane_block_height(BLOCK_SIZE bsize,
michael@0:                                      const struct macroblockd_plane* plane) {
michael@0:   return 4 << (b_height_log2(bsize) - plane->subsampling_y);
michael@0: }
michael@0: 
michael@0: typedef void (*foreach_transformed_block_visitor)(int plane, int block,
michael@0:                                                   BLOCK_SIZE plane_bsize,
michael@0:                                                   TX_SIZE tx_size,
michael@0:                                                   void *arg);
michael@0: 
michael@0: static INLINE void foreach_transformed_block_in_plane(
michael@0:     const MACROBLOCKD *const xd, BLOCK_SIZE bsize, int plane,
michael@0:     foreach_transformed_block_visitor visit, void *arg) {
michael@0:   const struct macroblockd_plane *const pd = &xd->plane[plane];
michael@0:   const MB_MODE_INFO* mbmi = &xd->mi_8x8[0]->mbmi;
michael@0:   // block and transform sizes, in number of 4x4 blocks log 2 ("*_b")
michael@0:   // 4x4=0, 8x8=2, 16x16=4, 32x32=6, 64x64=8
michael@0:   // transform size varies per plane, look it up in a common way.
michael@0:   const TX_SIZE tx_size = plane ? get_uv_tx_size(mbmi)
michael@0:                                 : mbmi->tx_size;
michael@0:   const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, pd);
michael@0:   const int num_4x4_w = num_4x4_blocks_wide_lookup[plane_bsize];
michael@0:   const int num_4x4_h = num_4x4_blocks_high_lookup[plane_bsize];
michael@0:   const int step = 1 << (tx_size << 1);
michael@0:   int i;
michael@0: 
michael@0:   // If mb_to_right_edge is < 0 we are in a situation in which
michael@0:   // the current block size extends into the UMV and we won't
michael@0:   // visit the sub blocks that are wholly within the UMV.
michael@0:   if (xd->mb_to_right_edge < 0 || xd->mb_to_bottom_edge < 0) {
michael@0:     int r, c;
michael@0: 
michael@0:     int max_blocks_wide = num_4x4_w;
michael@0:     int max_blocks_high = num_4x4_h;
michael@0: 
michael@0:     // xd->mb_to_right_edge is in units of pixels * 8.  This converts
michael@0:     // it to 4x4 block sizes.
michael@0:     if (xd->mb_to_right_edge < 0)
michael@0:       max_blocks_wide += (xd->mb_to_right_edge >> (5 + pd->subsampling_x));
michael@0: 
michael@0:     if (xd->mb_to_bottom_edge < 0)
michael@0:       max_blocks_high += (xd->mb_to_bottom_edge >> (5 + pd->subsampling_y));
michael@0: 
michael@0:     i = 0;
michael@0:     // Unlike the normal case - in here we have to keep track of the
michael@0:     // row and column of the blocks we use so that we know if we are in
michael@0:     // the unrestricted motion border.
michael@0:     for (r = 0; r < num_4x4_h; r += (1 << tx_size)) {
michael@0:       for (c = 0; c < num_4x4_w; c += (1 << tx_size)) {
michael@0:         if (r < max_blocks_high && c < max_blocks_wide)
michael@0:           visit(plane, i, plane_bsize, tx_size, arg);
michael@0:         i += step;
michael@0:       }
michael@0:     }
michael@0:   } else {
michael@0:     for (i = 0; i < num_4x4_w * num_4x4_h; i += step)
michael@0:       visit(plane, i, plane_bsize, tx_size, arg);
michael@0:   }
michael@0: }
michael@0: 
michael@0: static INLINE void foreach_transformed_block(
michael@0:     const MACROBLOCKD* const xd, BLOCK_SIZE bsize,
michael@0:     foreach_transformed_block_visitor visit, void *arg) {
michael@0:   int plane;
michael@0: 
michael@0:   for (plane = 0; plane < MAX_MB_PLANE; plane++)
michael@0:     foreach_transformed_block_in_plane(xd, bsize, plane, visit, arg);
michael@0: }
michael@0: 
michael@0: static INLINE void foreach_transformed_block_uv(
michael@0:     const MACROBLOCKD* const xd, BLOCK_SIZE bsize,
michael@0:     foreach_transformed_block_visitor visit, void *arg) {
michael@0:   int plane;
michael@0: 
michael@0:   for (plane = 1; plane < MAX_MB_PLANE; plane++)
michael@0:     foreach_transformed_block_in_plane(xd, bsize, plane, visit, arg);
michael@0: }
michael@0: 
michael@0: static int raster_block_offset(BLOCK_SIZE plane_bsize,
michael@0:                                int raster_block, int stride) {
michael@0:   const int bw = b_width_log2(plane_bsize);
michael@0:   const int y = 4 * (raster_block >> bw);
michael@0:   const int x = 4 * (raster_block & ((1 << bw) - 1));
michael@0:   return y * stride + x;
michael@0: }
michael@0: static int16_t* raster_block_offset_int16(BLOCK_SIZE plane_bsize,
michael@0:                                           int raster_block, int16_t *base) {
michael@0:   const int stride = 4 << b_width_log2(plane_bsize);
michael@0:   return base + raster_block_offset(plane_bsize, raster_block, stride);
michael@0: }
michael@0: static uint8_t* raster_block_offset_uint8(BLOCK_SIZE plane_bsize,
michael@0:                                           int raster_block, uint8_t *base,
michael@0:                                           int stride) {
michael@0:   return base + raster_block_offset(plane_bsize, raster_block, stride);
michael@0: }
michael@0: 
michael@0: static int txfrm_block_to_raster_block(BLOCK_SIZE plane_bsize,
michael@0:                                        TX_SIZE tx_size, int block) {
michael@0:   const int bwl = b_width_log2(plane_bsize);
michael@0:   const int tx_cols_log2 = bwl - tx_size;
michael@0:   const int tx_cols = 1 << tx_cols_log2;
michael@0:   const int raster_mb = block >> (tx_size << 1);
michael@0:   const int x = (raster_mb & (tx_cols - 1)) << tx_size;
michael@0:   const int y = (raster_mb >> tx_cols_log2) << tx_size;
michael@0:   return x + (y << bwl);
michael@0: }
michael@0: 
michael@0: static void txfrm_block_to_raster_xy(BLOCK_SIZE plane_bsize,
michael@0:                                      TX_SIZE tx_size, int block,
michael@0:                                      int *x, int *y) {
michael@0:   const int bwl = b_width_log2(plane_bsize);
michael@0:   const int tx_cols_log2 = bwl - tx_size;
michael@0:   const int tx_cols = 1 << tx_cols_log2;
michael@0:   const int raster_mb = block >> (tx_size << 1);
michael@0:   *x = (raster_mb & (tx_cols - 1)) << tx_size;
michael@0:   *y = (raster_mb >> tx_cols_log2) << tx_size;
michael@0: }
michael@0: 
michael@0: static void extend_for_intra(MACROBLOCKD *xd, BLOCK_SIZE plane_bsize,
michael@0:                              int plane, int block, TX_SIZE tx_size) {
michael@0:   struct macroblockd_plane *const pd = &xd->plane[plane];
michael@0:   uint8_t *const buf = pd->dst.buf;
michael@0:   const int stride = pd->dst.stride;
michael@0: 
michael@0:   int x, y;
michael@0:   txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &x, &y);
michael@0:   x = x * 4 - 1;
michael@0:   y = y * 4 - 1;
michael@0:   // Copy a pixel into the umv if we are in a situation where the block size
michael@0:   // extends into the UMV.
michael@0:   // TODO(JBB): Should be able to do the full extend in place so we don't have
michael@0:   // to do this multiple times.
michael@0:   if (xd->mb_to_right_edge < 0) {
michael@0:     const int bw = 4 << b_width_log2(plane_bsize);
michael@0:     const int umv_border_start = bw + (xd->mb_to_right_edge >>
michael@0:                                        (3 + pd->subsampling_x));
michael@0: 
michael@0:     if (x + bw > umv_border_start)
michael@0:       vpx_memset(&buf[y * stride + umv_border_start],
michael@0:                  buf[y * stride + umv_border_start - 1], bw);
michael@0:   }
michael@0: 
michael@0:   if (xd->mb_to_bottom_edge < 0) {
michael@0:     if (xd->left_available || x >= 0) {
michael@0:       const int bh = 4 << b_height_log2(plane_bsize);
michael@0:       const int umv_border_start =
michael@0:           bh + (xd->mb_to_bottom_edge >> (3 + pd->subsampling_y));
michael@0: 
michael@0:       if (y + bh > umv_border_start) {
michael@0:         const uint8_t c = buf[(umv_border_start - 1) * stride + x];
michael@0:         uint8_t *d = &buf[umv_border_start * stride + x];
michael@0:         int i;
michael@0:         for (i = 0; i < bh; ++i, d += stride)
michael@0:           *d = c;
michael@0:       }
michael@0:     }
michael@0:   }
michael@0: }
michael@0: 
michael@0: static void set_contexts(const MACROBLOCKD *xd, struct macroblockd_plane *pd,
michael@0:                          BLOCK_SIZE plane_bsize, TX_SIZE tx_size,
michael@0:                          int has_eob, int aoff, int loff) {
michael@0:   ENTROPY_CONTEXT *const a = pd->above_context + aoff;
michael@0:   ENTROPY_CONTEXT *const l = pd->left_context + loff;
michael@0:   const int tx_size_in_blocks = 1 << tx_size;
michael@0: 
michael@0:   // above
michael@0:   if (has_eob && xd->mb_to_right_edge < 0) {
michael@0:     int i;
michael@0:     const int blocks_wide = num_4x4_blocks_wide_lookup[plane_bsize] +
michael@0:                             (xd->mb_to_right_edge >> (5 + pd->subsampling_x));
michael@0:     int above_contexts = tx_size_in_blocks;
michael@0:     if (above_contexts + aoff > blocks_wide)
michael@0:       above_contexts = blocks_wide - aoff;
michael@0: 
michael@0:     for (i = 0; i < above_contexts; ++i)
michael@0:       a[i] = has_eob;
michael@0:     for (i = above_contexts; i < tx_size_in_blocks; ++i)
michael@0:       a[i] = 0;
michael@0:   } else {
michael@0:     vpx_memset(a, has_eob, sizeof(ENTROPY_CONTEXT) * tx_size_in_blocks);
michael@0:   }
michael@0: 
michael@0:   // left
michael@0:   if (has_eob && xd->mb_to_bottom_edge < 0) {
michael@0:     int i;
michael@0:     const int blocks_high = num_4x4_blocks_high_lookup[plane_bsize] +
michael@0:                             (xd->mb_to_bottom_edge >> (5 + pd->subsampling_y));
michael@0:     int left_contexts = tx_size_in_blocks;
michael@0:     if (left_contexts + loff > blocks_high)
michael@0:       left_contexts = blocks_high - loff;
michael@0: 
michael@0:     for (i = 0; i < left_contexts; ++i)
michael@0:       l[i] = has_eob;
michael@0:     for (i = left_contexts; i < tx_size_in_blocks; ++i)
michael@0:       l[i] = 0;
michael@0:   } else {
michael@0:     vpx_memset(l, has_eob, sizeof(ENTROPY_CONTEXT) * tx_size_in_blocks);
michael@0:   }
michael@0: }
michael@0: 
michael@0: static int get_tx_eob(const struct segmentation *seg, int segment_id,
michael@0:                       TX_SIZE tx_size) {
michael@0:   const int eob_max = 16 << (tx_size << 1);
michael@0:   return vp9_segfeature_active(seg, segment_id, SEG_LVL_SKIP) ? 0 : eob_max;
michael@0: }
michael@0: 
michael@0: #endif  // VP9_COMMON_VP9_BLOCKD_H_