Adding get_entropy_context function.

Moving common code from encoder and decoder to this function.

Change-Id: I60fa643fb1ddf7ebbff5e83b6c4710137b0195ef

diff --git a/vp9/common/vp9_blockd.h b/vp9/common/vp9_blockd.h
index 14affe6292b9c560f567c5bb6e6af18e7d1f0975..0b0958f41dea427d12ff7bd25bdb2c050a0ed3f0 100644 (file)
--- a/vp9/common/vp9_blockd.h
+++ b/vp9/common/vp9_blockd.h
@@ -584,4 +584,10 @@ static void set_contexts(MACROBLOCKD *xd, struct macroblockd_plane *pd,
   }
 }
 
+static int get_tx_eob(struct segmentation *seg, int segment_id,
+                      TX_SIZE tx_size) {
+  const int eob_max = 16 << (tx_size << 1);
+  return vp9_segfeature_active(seg, segment_id, SEG_LVL_SKIP) ? 0 : eob_max;
+}
+
 #endif  // VP9_COMMON_VP9_BLOCKD_H_

diff --git a/vp9/common/vp9_entropy.h b/vp9/common/vp9_entropy.h
index 2552056ed19056dad18e71d5726d5fd98baf7d6c..2da613a56088ede9f7b12eaf1fcfcebdd00f8d4f 100644 (file)
--- a/vp9/common/vp9_entropy.h
+++ b/vp9/common/vp9_entropy.h
@@ -336,6 +336,45 @@ static INLINE const int16_t* get_iscan_16x16(TX_TYPE tx_type) {
   }
 }
 
+static int get_entropy_context(const MACROBLOCKD *xd, TX_SIZE tx_size,
+                               PLANE_TYPE type, int block_idx,
+                               ENTROPY_CONTEXT *A, ENTROPY_CONTEXT *L,
+                               const int16_t **scan,
+                               const uint8_t **band_translate) {
+  ENTROPY_CONTEXT above_ec, left_ec;
+
+  switch (tx_size) {
+    case TX_4X4:
+      *scan = get_scan_4x4(get_tx_type_4x4(type, xd, block_idx));
+      *band_translate = vp9_coefband_trans_4x4;
+      above_ec = A[0] != 0;
+      left_ec = L[0] != 0;
+      break;
+    case TX_8X8:
+      *scan = get_scan_8x8(get_tx_type_8x8(type, xd));
+      *band_translate = vp9_coefband_trans_8x8plus;
+      above_ec = !!*(uint16_t *)A;
+      left_ec  = !!*(uint16_t *)L;
+      break;
+    case TX_16X16:
+      *scan = get_scan_16x16(get_tx_type_16x16(type, xd));
+      *band_translate = vp9_coefband_trans_8x8plus;
+      above_ec = !!*(uint32_t *)A;
+      left_ec  = !!*(uint32_t *)L;
+      break;
+    case TX_32X32:
+      *scan = vp9_default_scan_32x32;
+      *band_translate = vp9_coefband_trans_8x8plus;
+      above_ec = !!*(uint64_t *)A;
+      left_ec  = !!*(uint64_t *)L;
+      break;
+    default:
+      assert(!"Invalid transform size.");
+  }
+
+  return combine_entropy_contexts(above_ec, left_ec);
+}
+
 enum { VP9_COEF_UPDATE_PROB = 252 };
 
 #endif  // VP9_COMMON_VP9_ENTROPY_H_

diff --git a/vp9/decoder/vp9_detokenize.c b/vp9/decoder/vp9_detokenize.c
index 2b94d79b9d8e8464fcf7231aee4ef88ba5c6cc81..c119093df842f2b318c39bf30bc41bb9fbf17805 100644 (file)
--- a/vp9/decoder/vp9_detokenize.c
+++ b/vp9/decoder/vp9_detokenize.c
@@ -94,9 +94,8 @@ static int decode_coefs(VP9_COMMON *cm, const MACROBLOCKD *xd,
                         ENTROPY_CONTEXT *A, ENTROPY_CONTEXT *L) {
   FRAME_CONTEXT *const fc = &cm->fc;
   FRAME_COUNTS *const counts = &cm->counts;
-  ENTROPY_CONTEXT above_ec, left_ec;
   const int ref = is_inter_block(&xd->mode_info_context->mbmi);
-  int band, pt, c = 0;
+  int band, c = 0;
   vp9_prob (*coef_probs)[PREV_COEF_CONTEXTS][UNCONSTRAINED_NODES] =
       fc->coef_probs[tx_size][type][ref];
   vp9_prob coef_probs_full[COEF_BANDS][PREV_COEF_CONTEXTS][ENTROPY_NODES];
@@ -104,38 +103,10 @@ static int decode_coefs(VP9_COMMON *cm, const MACROBLOCKD *xd,
   vp9_prob *prob;
   vp9_coeff_count_model *coef_counts = counts->coef[tx_size];
   const int16_t *scan, *nb;
-  uint8_t token_cache[1024];
   const uint8_t *band_translate;
-
-  switch (tx_size) {
-    default:
-    case TX_4X4:
-      scan = get_scan_4x4(get_tx_type_4x4(type, xd, block_idx));
-      above_ec = A[0] != 0;
-      left_ec = L[0] != 0;
-      band_translate = vp9_coefband_trans_4x4;
-      break;
-    case TX_8X8:
-      scan = get_scan_8x8(get_tx_type_8x8(type, xd));
-      above_ec = !!*(uint16_t *)A;
-      left_ec  = !!*(uint16_t *)L;
-      band_translate = vp9_coefband_trans_8x8plus;
-      break;
-    case TX_16X16:
-      scan = get_scan_16x16(get_tx_type_16x16(type, xd));
-      above_ec = !!*(uint32_t *)A;
-      left_ec  = !!*(uint32_t *)L;
-      band_translate = vp9_coefband_trans_8x8plus;
-      break;
-    case TX_32X32:
-      scan = vp9_default_scan_32x32;
-      above_ec = !!*(uint64_t *)A;
-      left_ec  = !!*(uint64_t *)L;
-      band_translate = vp9_coefband_trans_8x8plus;
-      break;
-  }
-
-  pt = combine_entropy_contexts(above_ec, left_ec);
+  uint8_t token_cache[1024];
+  int pt = get_entropy_context(xd, tx_size, type, block_idx, A, L,
+                               &scan, &band_translate);
   nb = vp9_get_coef_neighbors_handle(scan);
 
   while (1) {
@@ -239,10 +210,6 @@ SKIP_START:
   return c;
 }
 
-static int get_eob(struct segmentation *seg, int segment_id, int eob_max) {
-  return vp9_segfeature_active(seg, segment_id, SEG_LVL_SKIP) ? 0 : eob_max;
-}
-
 struct decode_block_args {
   VP9D_COMP *pbi;
   vp9_reader *r;
@@ -258,8 +225,7 @@ static void decode_block(int plane, int block, BLOCK_SIZE plane_bsize,
   struct segmentation *seg = &arg->pbi->common.seg;
   struct macroblockd_plane* pd = &xd->plane[plane];
   const int segment_id = xd->mode_info_context->mbmi.segment_id;
-  const int ss_txfrm_size = tx_size << 1;
-  const int seg_eob = get_eob(seg, segment_id, 16 << ss_txfrm_size);
+  const int seg_eob = get_tx_eob(seg, segment_id, tx_size);
   int aoff, loff, eob;
 
   txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &aoff, &loff);

diff --git a/vp9/encoder/vp9_tokenize.c b/vp9/encoder/vp9_tokenize.c
index 7f22b594f6d676f730f4f47260629161130bd506..d3a4e9ca3b39ea4f317a0fc41fe301139476b82f 100644 (file)
--- a/vp9/encoder/vp9_tokenize.c
+++ b/vp9/encoder/vp9_tokenize.c
@@ -121,16 +121,16 @@ static void tokenize_b(int plane, int block, BLOCK_SIZE plane_bsize,
   const int eob = pd->eobs[block];
   const PLANE_TYPE type = pd->plane_type;
   const int16_t *qcoeff_ptr = BLOCK_OFFSET(pd->qcoeff, block);
-  int seg_eob;
+
   const int segment_id = mbmi->segment_id;
   const int16_t *scan, *nb;
   vp9_coeff_count *const counts = cpi->coef_counts[tx_size];
   vp9_coeff_probs_model *const coef_probs = cpi->common.fc.coef_probs[tx_size];
   const int ref = is_inter_block(mbmi);
-  ENTROPY_CONTEXT above_ec, left_ec;
   uint8_t token_cache[1024];
   const uint8_t *band_translate;
   ENTROPY_CONTEXT *A, *L;
+  const int seg_eob = get_tx_eob(&cpi->common.seg, segment_id, tx_size);
   int aoff, loff;
   txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &aoff, &loff);
 
@@ -139,45 +139,9 @@ static void tokenize_b(int plane, int block, BLOCK_SIZE plane_bsize,
 
   assert((!type && !plane) || (type && plane));
 
-  switch (tx_size) {
-    case TX_4X4:
-      above_ec = A[0] != 0;
-      left_ec = L[0] != 0;
-      seg_eob = 16;
-      scan = get_scan_4x4(get_tx_type_4x4(type, xd, block));
-      band_translate = vp9_coefband_trans_4x4;
-      break;
-    case TX_8X8:
-      above_ec = !!*(uint16_t *)A;
-      left_ec  = !!*(uint16_t *)L;
-      seg_eob = 64;
-      scan = get_scan_8x8(get_tx_type_8x8(type, xd));
-      band_translate = vp9_coefband_trans_8x8plus;
-      break;
-    case TX_16X16:
-      above_ec = !!*(uint32_t *)A;
-      left_ec  = !!*(uint32_t *)L;
-      seg_eob = 256;
-      scan = get_scan_16x16(get_tx_type_16x16(type, xd));
-      band_translate = vp9_coefband_trans_8x8plus;
-      break;
-    case TX_32X32:
-      above_ec = !!*(uint64_t *)A;
-      left_ec  = !!*(uint64_t *)L;
-      seg_eob = 1024;
-      scan = vp9_default_scan_32x32;
-      band_translate = vp9_coefband_trans_8x8plus;
-      break;
-    default:
-      assert(!"Invalid transform size");
-  }
-
-  pt = combine_entropy_contexts(above_ec, left_ec);
+  pt = get_entropy_context(xd, tx_size, type, block, A, L,
+                           &scan, &band_translate);
   nb = vp9_get_coef_neighbors_handle(scan);
-
-  if (vp9_segfeature_active(&cpi->common.seg, segment_id, SEG_LVL_SKIP))
-    seg_eob = 0;
-
   c = 0;
   do {
     const int band = get_coef_band(band_translate, c);