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-rw-r--r--third_party/aom/av1/encoder/context_tree.c215
1 files changed, 215 insertions, 0 deletions
diff --git a/third_party/aom/av1/encoder/context_tree.c b/third_party/aom/av1/encoder/context_tree.c
new file mode 100644
index 0000000000..57f59f304b
--- /dev/null
+++ b/third_party/aom/av1/encoder/context_tree.c
@@ -0,0 +1,215 @@
+/*
+ * 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 "av1/encoder/context_tree.h"
+#include "av1/encoder/encoder.h"
+
+static const BLOCK_SIZE square[MAX_SB_SIZE_LOG2 - 1] = {
+ BLOCK_4X4, BLOCK_8X8, BLOCK_16X16, BLOCK_32X32, BLOCK_64X64, BLOCK_128X128,
+};
+
+static void alloc_mode_context(AV1_COMMON *cm, int num_pix,
+ PICK_MODE_CONTEXT *ctx) {
+ const int num_planes = av1_num_planes(cm);
+ int i;
+ const int num_blk = num_pix / 16;
+ ctx->num_4x4_blk = num_blk;
+
+ CHECK_MEM_ERROR(cm, ctx->blk_skip, aom_calloc(num_blk, sizeof(uint8_t)));
+ for (i = 0; i < num_planes; ++i) {
+ CHECK_MEM_ERROR(cm, ctx->coeff[i],
+ aom_memalign(32, num_pix * sizeof(*ctx->coeff[i])));
+ CHECK_MEM_ERROR(cm, ctx->qcoeff[i],
+ aom_memalign(32, num_pix * sizeof(*ctx->qcoeff[i])));
+ CHECK_MEM_ERROR(cm, ctx->dqcoeff[i],
+ aom_memalign(32, num_pix * sizeof(*ctx->dqcoeff[i])));
+ CHECK_MEM_ERROR(cm, ctx->eobs[i],
+ aom_memalign(32, num_blk * sizeof(*ctx->eobs[i])));
+ CHECK_MEM_ERROR(
+ cm, ctx->txb_entropy_ctx[i],
+ aom_memalign(32, num_blk * sizeof(*ctx->txb_entropy_ctx[i])));
+ }
+
+ if (num_pix <= MAX_PALETTE_SQUARE) {
+ for (i = 0; i < 2; ++i) {
+ CHECK_MEM_ERROR(
+ cm, ctx->color_index_map[i],
+ aom_memalign(32, num_pix * sizeof(*ctx->color_index_map[i])));
+ }
+ }
+}
+
+static void free_mode_context(PICK_MODE_CONTEXT *ctx, const int num_planes) {
+ int i;
+ aom_free(ctx->blk_skip);
+ ctx->blk_skip = 0;
+ for (i = 0; i < num_planes; ++i) {
+ aom_free(ctx->coeff[i]);
+ ctx->coeff[i] = 0;
+ aom_free(ctx->qcoeff[i]);
+ ctx->qcoeff[i] = 0;
+ aom_free(ctx->dqcoeff[i]);
+ ctx->dqcoeff[i] = 0;
+ aom_free(ctx->eobs[i]);
+ ctx->eobs[i] = 0;
+ aom_free(ctx->txb_entropy_ctx[i]);
+ ctx->txb_entropy_ctx[i] = 0;
+ }
+
+ for (i = 0; i < 2; ++i) {
+ aom_free(ctx->color_index_map[i]);
+ ctx->color_index_map[i] = 0;
+ }
+}
+
+static void alloc_tree_contexts(AV1_COMMON *cm, PC_TREE *tree, int num_pix,
+ int is_leaf) {
+ alloc_mode_context(cm, num_pix, &tree->none);
+
+ if (is_leaf) return;
+
+ alloc_mode_context(cm, num_pix / 2, &tree->horizontal[0]);
+ alloc_mode_context(cm, num_pix / 2, &tree->vertical[0]);
+
+ alloc_mode_context(cm, num_pix / 2, &tree->horizontal[1]);
+ alloc_mode_context(cm, num_pix / 2, &tree->vertical[1]);
+
+ alloc_mode_context(cm, num_pix / 4, &tree->horizontala[0]);
+ alloc_mode_context(cm, num_pix / 4, &tree->horizontala[1]);
+ alloc_mode_context(cm, num_pix / 2, &tree->horizontala[2]);
+
+ alloc_mode_context(cm, num_pix / 2, &tree->horizontalb[0]);
+ alloc_mode_context(cm, num_pix / 4, &tree->horizontalb[1]);
+ alloc_mode_context(cm, num_pix / 4, &tree->horizontalb[2]);
+
+ alloc_mode_context(cm, num_pix / 4, &tree->verticala[0]);
+ alloc_mode_context(cm, num_pix / 4, &tree->verticala[1]);
+ alloc_mode_context(cm, num_pix / 2, &tree->verticala[2]);
+
+ alloc_mode_context(cm, num_pix / 2, &tree->verticalb[0]);
+ alloc_mode_context(cm, num_pix / 4, &tree->verticalb[1]);
+ alloc_mode_context(cm, num_pix / 4, &tree->verticalb[2]);
+
+ for (int i = 0; i < 4; ++i) {
+ alloc_mode_context(cm, num_pix / 4, &tree->horizontal4[i]);
+ alloc_mode_context(cm, num_pix / 4, &tree->vertical4[i]);
+ }
+}
+
+static void free_tree_contexts(PC_TREE *tree, const int num_planes) {
+ int i;
+ for (i = 0; i < 3; i++) {
+ free_mode_context(&tree->horizontala[i], num_planes);
+ free_mode_context(&tree->horizontalb[i], num_planes);
+ free_mode_context(&tree->verticala[i], num_planes);
+ free_mode_context(&tree->verticalb[i], num_planes);
+ }
+ for (i = 0; i < 4; ++i) {
+ free_mode_context(&tree->horizontal4[i], num_planes);
+ free_mode_context(&tree->vertical4[i], num_planes);
+ }
+ free_mode_context(&tree->none, num_planes);
+ free_mode_context(&tree->horizontal[0], num_planes);
+ free_mode_context(&tree->horizontal[1], num_planes);
+ free_mode_context(&tree->vertical[0], num_planes);
+ free_mode_context(&tree->vertical[1], num_planes);
+}
+
+// This function sets up a tree of contexts such that at each square
+// partition level. There are contexts for none, horizontal, vertical, and
+// split. Along with a block_size value and a selected block_size which
+// represents the state of our search.
+void av1_setup_pc_tree(AV1_COMMON *cm, ThreadData *td) {
+ int i, j;
+ const int tree_nodes_inc = 1024;
+ const int leaf_factor = 4;
+ const int leaf_nodes = 256 * leaf_factor;
+ const int tree_nodes = tree_nodes_inc + 256 + 64 + 16 + 4 + 1;
+ int pc_tree_index = 0;
+ PC_TREE *this_pc;
+ int square_index = 1;
+ int nodes;
+
+ aom_free(td->pc_tree);
+ CHECK_MEM_ERROR(cm, td->pc_tree,
+ aom_calloc(tree_nodes, sizeof(*td->pc_tree)));
+ this_pc = &td->pc_tree[0];
+
+ // Sets up all the leaf nodes in the tree.
+ for (pc_tree_index = 0; pc_tree_index < leaf_nodes; ++pc_tree_index) {
+ PC_TREE *const tree = &td->pc_tree[pc_tree_index];
+ tree->block_size = square[0];
+ alloc_tree_contexts(cm, tree, 16, 1);
+ }
+
+ // Each node has 4 leaf nodes, fill each block_size level of the tree
+ // from leafs to the root.
+ for (nodes = leaf_nodes >> 2; nodes > 0; nodes >>= 2) {
+ for (i = 0; i < nodes; ++i) {
+ PC_TREE *const tree = &td->pc_tree[pc_tree_index];
+ alloc_tree_contexts(cm, tree, 16 << (2 * square_index), 0);
+ tree->block_size = square[square_index];
+ for (j = 0; j < 4; j++) tree->split[j] = this_pc++;
+ ++pc_tree_index;
+ }
+ ++square_index;
+ }
+
+ // Set up the root node for the largest superblock size
+ i = MAX_MIB_SIZE_LOG2 - MIN_MIB_SIZE_LOG2;
+ td->pc_root[i] = &td->pc_tree[tree_nodes - 1];
+ td->pc_root[i]->none.best_mode_index = 2;
+ // Set up the root nodes for the rest of the possible superblock sizes
+ while (--i >= 0) {
+ td->pc_root[i] = td->pc_root[i + 1]->split[0];
+ td->pc_root[i]->none.best_mode_index = 2;
+ }
+}
+
+void av1_free_pc_tree(ThreadData *td, const int num_planes) {
+ if (td->pc_tree != NULL) {
+ const int tree_nodes_inc = 1024;
+ const int tree_nodes = tree_nodes_inc + 256 + 64 + 16 + 4 + 1;
+ for (int i = 0; i < tree_nodes; ++i) {
+ free_tree_contexts(&td->pc_tree[i], num_planes);
+ }
+ aom_free(td->pc_tree);
+ td->pc_tree = NULL;
+ }
+}
+
+void av1_copy_tree_context(PICK_MODE_CONTEXT *dst_ctx,
+ PICK_MODE_CONTEXT *src_ctx) {
+ dst_ctx->mic = src_ctx->mic;
+ dst_ctx->mbmi_ext = src_ctx->mbmi_ext;
+
+ dst_ctx->num_4x4_blk = src_ctx->num_4x4_blk;
+ dst_ctx->skip = src_ctx->skip;
+ dst_ctx->skippable = src_ctx->skippable;
+ dst_ctx->best_mode_index = src_ctx->best_mode_index;
+
+ memcpy(dst_ctx->blk_skip, src_ctx->blk_skip,
+ sizeof(uint8_t) * src_ctx->num_4x4_blk);
+
+ dst_ctx->hybrid_pred_diff = src_ctx->hybrid_pred_diff;
+ dst_ctx->comp_pred_diff = src_ctx->comp_pred_diff;
+ dst_ctx->single_pred_diff = src_ctx->single_pred_diff;
+
+ dst_ctx->rate = src_ctx->rate;
+ dst_ctx->dist = src_ctx->dist;
+ dst_ctx->rdcost = src_ctx->rdcost;
+ dst_ctx->rd_mode_is_ready = src_ctx->rd_mode_is_ready;
+
+ memcpy(dst_ctx->pred_mv, src_ctx->pred_mv, sizeof(MV) * REF_FRAMES);
+ dst_ctx->pred_interp_filter = src_ctx->pred_interp_filter;
+
+ dst_ctx->partition = src_ctx->partition;
+}
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