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-rw-r--r--third_party/aom/av1/encoder/context_tree.c331
1 files changed, 331 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 000000000..4c7d6ff00
--- /dev/null
+++ b/third_party/aom/av1/encoder/context_tree.c
@@ -0,0 +1,331 @@
+/*
+ * 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] = {
+#if CONFIG_CB4X4
+ BLOCK_4X4,
+#endif
+ BLOCK_8X8, BLOCK_16X16, BLOCK_32X32, BLOCK_64X64,
+#if CONFIG_EXT_PARTITION
+ BLOCK_128X128,
+#endif // CONFIG_EXT_PARTITION
+};
+
+static void alloc_mode_context(AV1_COMMON *cm, int num_4x4_blk,
+#if CONFIG_EXT_PARTITION_TYPES
+ PARTITION_TYPE partition,
+#endif
+ PICK_MODE_CONTEXT *ctx) {
+ const int num_blk = (num_4x4_blk < 4 ? 4 : num_4x4_blk);
+ const int num_pix = num_blk * tx_size_2d[0];
+ int i;
+#if CONFIG_CB4X4 && CONFIG_VAR_TX
+ ctx->num_4x4_blk = num_blk / 4;
+#else
+ ctx->num_4x4_blk = num_blk;
+#endif
+
+#if CONFIG_EXT_PARTITION_TYPES
+ ctx->partition = partition;
+#endif
+
+ for (i = 0; i < MAX_MB_PLANE; ++i) {
+#if CONFIG_VAR_TX
+ CHECK_MEM_ERROR(cm, ctx->blk_skip[i], aom_calloc(num_blk, sizeof(uint8_t)));
+#endif
+ 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])));
+#if CONFIG_LV_MAP
+ CHECK_MEM_ERROR(
+ cm, ctx->txb_entropy_ctx[i],
+ aom_memalign(32, num_blk * sizeof(*ctx->txb_entropy_ctx[i])));
+#endif
+
+#if CONFIG_PVQ
+ CHECK_MEM_ERROR(cm, ctx->pvq_ref_coeff[i],
+ aom_memalign(32, num_pix * sizeof(*ctx->pvq_ref_coeff[i])));
+#endif
+ }
+
+#if CONFIG_PALETTE
+ if (cm->allow_screen_content_tools) {
+ 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])));
+ }
+ }
+#endif // CONFIG_PALETTE
+}
+
+static void free_mode_context(PICK_MODE_CONTEXT *ctx) {
+ int i;
+ for (i = 0; i < MAX_MB_PLANE; ++i) {
+#if CONFIG_VAR_TX
+ aom_free(ctx->blk_skip[i]);
+ ctx->blk_skip[i] = 0;
+#endif
+ 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;
+#if CONFIG_PVQ
+ aom_free(ctx->pvq_ref_coeff[i]);
+ ctx->pvq_ref_coeff[i] = 0;
+#endif
+ aom_free(ctx->eobs[i]);
+ ctx->eobs[i] = 0;
+#if CONFIG_LV_MAP
+ aom_free(ctx->txb_entropy_ctx[i]);
+ ctx->txb_entropy_ctx[i] = 0;
+#endif
+ }
+
+#if CONFIG_PALETTE
+ for (i = 0; i < 2; ++i) {
+ aom_free(ctx->color_index_map[i]);
+ ctx->color_index_map[i] = 0;
+ }
+#endif // CONFIG_PALETTE
+}
+
+static void alloc_tree_contexts(AV1_COMMON *cm, PC_TREE *tree,
+ int num_4x4_blk) {
+#if CONFIG_EXT_PARTITION_TYPES
+ alloc_mode_context(cm, num_4x4_blk, PARTITION_NONE, &tree->none);
+ alloc_mode_context(cm, num_4x4_blk / 2, PARTITION_HORZ, &tree->horizontal[0]);
+ alloc_mode_context(cm, num_4x4_blk / 2, PARTITION_VERT, &tree->vertical[0]);
+ alloc_mode_context(cm, num_4x4_blk / 2, PARTITION_VERT, &tree->horizontal[1]);
+ alloc_mode_context(cm, num_4x4_blk / 2, PARTITION_VERT, &tree->vertical[1]);
+
+ alloc_mode_context(cm, num_4x4_blk / 4, PARTITION_HORZ_A,
+ &tree->horizontala[0]);
+ alloc_mode_context(cm, num_4x4_blk / 4, PARTITION_HORZ_A,
+ &tree->horizontala[1]);
+ alloc_mode_context(cm, num_4x4_blk / 2, PARTITION_HORZ_A,
+ &tree->horizontala[2]);
+ alloc_mode_context(cm, num_4x4_blk / 2, PARTITION_HORZ_B,
+ &tree->horizontalb[0]);
+ alloc_mode_context(cm, num_4x4_blk / 4, PARTITION_HORZ_B,
+ &tree->horizontalb[1]);
+ alloc_mode_context(cm, num_4x4_blk / 4, PARTITION_HORZ_B,
+ &tree->horizontalb[2]);
+ alloc_mode_context(cm, num_4x4_blk / 4, PARTITION_VERT_A,
+ &tree->verticala[0]);
+ alloc_mode_context(cm, num_4x4_blk / 4, PARTITION_VERT_A,
+ &tree->verticala[1]);
+ alloc_mode_context(cm, num_4x4_blk / 2, PARTITION_VERT_A,
+ &tree->verticala[2]);
+ alloc_mode_context(cm, num_4x4_blk / 2, PARTITION_VERT_B,
+ &tree->verticalb[0]);
+ alloc_mode_context(cm, num_4x4_blk / 4, PARTITION_VERT_B,
+ &tree->verticalb[1]);
+ alloc_mode_context(cm, num_4x4_blk / 4, PARTITION_VERT_B,
+ &tree->verticalb[2]);
+#ifdef CONFIG_SUPERTX
+ alloc_mode_context(cm, num_4x4_blk, PARTITION_HORZ,
+ &tree->horizontal_supertx);
+ alloc_mode_context(cm, num_4x4_blk, PARTITION_VERT, &tree->vertical_supertx);
+ alloc_mode_context(cm, num_4x4_blk, PARTITION_SPLIT, &tree->split_supertx);
+ alloc_mode_context(cm, num_4x4_blk, PARTITION_HORZ_A,
+ &tree->horizontala_supertx);
+ alloc_mode_context(cm, num_4x4_blk, PARTITION_HORZ_B,
+ &tree->horizontalb_supertx);
+ alloc_mode_context(cm, num_4x4_blk, PARTITION_VERT_A,
+ &tree->verticala_supertx);
+ alloc_mode_context(cm, num_4x4_blk, PARTITION_VERT_B,
+ &tree->verticalb_supertx);
+#endif // CONFIG_SUPERTX
+#else
+ alloc_mode_context(cm, num_4x4_blk, &tree->none);
+ alloc_mode_context(cm, num_4x4_blk / 2, &tree->horizontal[0]);
+ alloc_mode_context(cm, num_4x4_blk / 2, &tree->vertical[0]);
+#ifdef CONFIG_SUPERTX
+ alloc_mode_context(cm, num_4x4_blk, &tree->horizontal_supertx);
+ alloc_mode_context(cm, num_4x4_blk, &tree->vertical_supertx);
+ alloc_mode_context(cm, num_4x4_blk, &tree->split_supertx);
+#endif
+
+ if (num_4x4_blk > 4) {
+ alloc_mode_context(cm, num_4x4_blk / 2, &tree->horizontal[1]);
+ alloc_mode_context(cm, num_4x4_blk / 2, &tree->vertical[1]);
+ } else {
+ memset(&tree->horizontal[1], 0, sizeof(tree->horizontal[1]));
+ memset(&tree->vertical[1], 0, sizeof(tree->vertical[1]));
+ }
+#endif // CONFIG_EXT_PARTITION_TYPES
+}
+
+static void free_tree_contexts(PC_TREE *tree) {
+#if CONFIG_EXT_PARTITION_TYPES
+ int i;
+ for (i = 0; i < 3; i++) {
+ free_mode_context(&tree->horizontala[i]);
+ free_mode_context(&tree->horizontalb[i]);
+ free_mode_context(&tree->verticala[i]);
+ free_mode_context(&tree->verticalb[i]);
+ }
+#endif // CONFIG_EXT_PARTITION_TYPES
+ free_mode_context(&tree->none);
+ free_mode_context(&tree->horizontal[0]);
+ free_mode_context(&tree->horizontal[1]);
+ free_mode_context(&tree->vertical[0]);
+ free_mode_context(&tree->vertical[1]);
+#ifdef CONFIG_SUPERTX
+ free_mode_context(&tree->horizontal_supertx);
+ free_mode_context(&tree->vertical_supertx);
+ free_mode_context(&tree->split_supertx);
+#if CONFIG_EXT_PARTITION_TYPES
+ free_mode_context(&tree->horizontala_supertx);
+ free_mode_context(&tree->horizontalb_supertx);
+ free_mode_context(&tree->verticala_supertx);
+ free_mode_context(&tree->verticalb_supertx);
+#endif // CONFIG_EXT_PARTITION_TYPES
+#endif // CONFIG_SUPERTX
+}
+
+// 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;
+// TODO(jingning): The pc_tree allocation is redundant. We can take out all
+// the leaf nodes after cb4x4 mode is enabled.
+#if CONFIG_CB4X4
+#if CONFIG_EXT_PARTITION
+ const int tree_nodes_inc = 1024;
+#else
+ const int tree_nodes_inc = 256;
+#endif // CONFIG_EXT_PARTITION
+ const int leaf_factor = 4;
+#else
+ const int tree_nodes_inc = 0;
+ const int leaf_factor = 1;
+#endif
+#if CONFIG_EXT_PARTITION
+ const int leaf_nodes = 256 * leaf_factor;
+ const int tree_nodes = tree_nodes_inc + 256 + 64 + 16 + 4 + 1;
+#else
+ const int leaf_nodes = 64 * leaf_factor;
+ const int tree_nodes = tree_nodes_inc + 64 + 16 + 4 + 1;
+#endif // CONFIG_EXT_PARTITION
+ int pc_tree_index = 0;
+ PC_TREE *this_pc;
+ PICK_MODE_CONTEXT *this_leaf;
+ int square_index = 1;
+ int nodes;
+
+ aom_free(td->leaf_tree);
+ CHECK_MEM_ERROR(cm, td->leaf_tree,
+ aom_calloc(leaf_nodes, sizeof(*td->leaf_tree)));
+ 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];
+ this_leaf = &td->leaf_tree[0];
+
+ // 4x4 blocks smaller than 8x8 but in the same 8x8 block share the same
+ // context so we only need to allocate 1 for each 8x8 block.
+ for (i = 0; i < leaf_nodes; ++i) {
+#if CONFIG_EXT_PARTITION_TYPES
+ alloc_mode_context(cm, 4, PARTITION_NONE, &td->leaf_tree[i]);
+#else
+ alloc_mode_context(cm, 16, &td->leaf_tree[i]);
+#endif
+ }
+
+ // 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];
+#if CONFIG_CB4X4
+ alloc_tree_contexts(cm, tree, 16);
+#else
+ alloc_tree_contexts(cm, tree, 4);
+#endif
+ tree->leaf_split[0] = this_leaf++;
+ for (j = 1; j < 4; j++) tree->leaf_split[j] = tree->leaf_split[0];
+ }
+
+ // 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];
+#if CONFIG_CB4X4
+ alloc_tree_contexts(cm, tree, 16 << (2 * square_index));
+#else
+ alloc_tree_contexts(cm, tree, 4 << (2 * square_index));
+#endif
+ 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) {
+#if CONFIG_CB4X4
+#if CONFIG_EXT_PARTITION
+ const int tree_nodes_inc = 1024;
+#else
+ const int tree_nodes_inc = 256;
+#endif // CONFIG_EXT_PARTITION
+ const int leaf_factor = 4;
+#else
+ const int tree_nodes_inc = 0;
+ const int leaf_factor = 1;
+#endif
+
+#if CONFIG_EXT_PARTITION
+ const int leaf_nodes = 256 * leaf_factor;
+ const int tree_nodes = tree_nodes_inc + 256 + 64 + 16 + 4 + 1;
+#else
+ const int leaf_nodes = 64 * leaf_factor;
+ const int tree_nodes = tree_nodes_inc + 64 + 16 + 4 + 1;
+#endif // CONFIG_EXT_PARTITION
+ int i;
+
+ // Set up all 4x4 mode contexts
+ for (i = 0; i < leaf_nodes; ++i) free_mode_context(&td->leaf_tree[i]);
+
+ // Sets up all the leaf nodes in the tree.
+ for (i = 0; i < tree_nodes; ++i) free_tree_contexts(&td->pc_tree[i]);
+
+ aom_free(td->pc_tree);
+ td->pc_tree = NULL;
+ aom_free(td->leaf_tree);
+ td->leaf_tree = NULL;
+}