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-rw-r--r--libs/libaom/src/av1/encoder/context_tree.c268
1 files changed, 268 insertions, 0 deletions
diff --git a/libs/libaom/src/av1/encoder/context_tree.c b/libs/libaom/src/av1/encoder/context_tree.c
new file mode 100644
index 000000000..9b5b1cbf9
--- /dev/null
+++ b/libs/libaom/src/av1/encoder/context_tree.c
@@ -0,0 +1,268 @@
+/*
+ * 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,
+};
+
+typedef struct {
+ tran_low_t *coeff_buf[MAX_MB_PLANE];
+ tran_low_t *qcoeff_buf[MAX_MB_PLANE];
+ tran_low_t *dqcoeff_buf[MAX_MB_PLANE];
+} PC_TREE_SHARED_BUFFERS;
+
+static AOM_INLINE void alloc_mode_context(AV1_COMMON *cm, int num_pix,
+ PICK_MODE_CONTEXT *ctx,
+ PC_TREE_SHARED_BUFFERS *shared_bufs) {
+ 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(*ctx->blk_skip)));
+ CHECK_MEM_ERROR(cm, ctx->tx_type_map,
+ aom_calloc(num_blk, sizeof(*ctx->tx_type_map)));
+ for (i = 0; i < num_planes; ++i) {
+ ctx->coeff[i] = shared_bufs->coeff_buf[i];
+ ctx->qcoeff[i] = shared_bufs->qcoeff_buf[i];
+ ctx->dqcoeff[i] = shared_bufs->dqcoeff_buf[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 AOM_INLINE void free_mode_context(PICK_MODE_CONTEXT *ctx,
+ const int num_planes) {
+ int i;
+ aom_free(ctx->blk_skip);
+ ctx->blk_skip = 0;
+ aom_free(ctx->tx_type_map);
+ ctx->tx_type_map = 0;
+ for (i = 0; i < num_planes; ++i) {
+ ctx->coeff[i] = 0;
+ ctx->qcoeff[i] = 0;
+ 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 AOM_INLINE void alloc_tree_contexts(
+ AV1_COMMON *cm, PC_TREE *tree, int num_pix, int is_leaf,
+ PC_TREE_SHARED_BUFFERS *shared_bufs) {
+ alloc_mode_context(cm, num_pix, &tree->none, shared_bufs);
+
+ if (is_leaf) return;
+
+ alloc_mode_context(cm, num_pix / 2, &tree->horizontal[0], shared_bufs);
+ alloc_mode_context(cm, num_pix / 2, &tree->vertical[0], shared_bufs);
+
+ alloc_mode_context(cm, num_pix / 2, &tree->horizontal[1], shared_bufs);
+ alloc_mode_context(cm, num_pix / 2, &tree->vertical[1], shared_bufs);
+
+ alloc_mode_context(cm, num_pix / 4, &tree->horizontala[0], shared_bufs);
+ alloc_mode_context(cm, num_pix / 4, &tree->horizontala[1], shared_bufs);
+ alloc_mode_context(cm, num_pix / 2, &tree->horizontala[2], shared_bufs);
+
+ alloc_mode_context(cm, num_pix / 2, &tree->horizontalb[0], shared_bufs);
+ alloc_mode_context(cm, num_pix / 4, &tree->horizontalb[1], shared_bufs);
+ alloc_mode_context(cm, num_pix / 4, &tree->horizontalb[2], shared_bufs);
+
+ alloc_mode_context(cm, num_pix / 4, &tree->verticala[0], shared_bufs);
+ alloc_mode_context(cm, num_pix / 4, &tree->verticala[1], shared_bufs);
+ alloc_mode_context(cm, num_pix / 2, &tree->verticala[2], shared_bufs);
+
+ alloc_mode_context(cm, num_pix / 2, &tree->verticalb[0], shared_bufs);
+ alloc_mode_context(cm, num_pix / 4, &tree->verticalb[1], shared_bufs);
+ alloc_mode_context(cm, num_pix / 4, &tree->verticalb[2], shared_bufs);
+
+ for (int i = 0; i < 4; ++i) {
+ alloc_mode_context(cm, num_pix / 4, &tree->horizontal4[i], shared_bufs);
+ alloc_mode_context(cm, num_pix / 4, &tree->vertical4[i], shared_bufs);
+ }
+}
+
+static AOM_INLINE 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 will compute the number of pc_tree nodes to be allocated
+// or freed as per the super block size of BLOCK_128X128 or BLOCK_64X64
+static AOM_INLINE int get_pc_tree_nodes(const int is_sb_size_128,
+ int stat_generation_stage) {
+ const int tree_nodes_inc = is_sb_size_128 ? 1024 : 0;
+ const int tree_nodes =
+ stat_generation_stage ? 1 : (tree_nodes_inc + 256 + 64 + 16 + 4 + 1);
+ return tree_nodes;
+}
+
+// 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_COMP *const cpi, ThreadData *td) {
+ AV1_COMMON *const cm = &cpi->common;
+ int i, j, stat_generation_stage = is_stat_generation_stage(cpi);
+ const int is_sb_size_128 = cm->seq_params.sb_size == BLOCK_128X128;
+ const int tree_nodes =
+ get_pc_tree_nodes(is_sb_size_128, stat_generation_stage);
+ int pc_tree_index = 0;
+ PC_TREE *this_pc;
+ PC_TREE_SHARED_BUFFERS shared_bufs;
+ 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];
+
+ for (i = 0; i < 3; i++) {
+ const int max_num_pix = MAX_SB_SIZE * MAX_SB_SIZE;
+ CHECK_MEM_ERROR(cm, td->tree_coeff_buf[i],
+ aom_memalign(32, max_num_pix * sizeof(tran_low_t)));
+ CHECK_MEM_ERROR(cm, td->tree_qcoeff_buf[i],
+ aom_memalign(32, max_num_pix * sizeof(tran_low_t)));
+ CHECK_MEM_ERROR(cm, td->tree_dqcoeff_buf[i],
+ aom_memalign(32, max_num_pix * sizeof(tran_low_t)));
+ shared_bufs.coeff_buf[i] = td->tree_coeff_buf[i];
+ shared_bufs.qcoeff_buf[i] = td->tree_qcoeff_buf[i];
+ shared_bufs.dqcoeff_buf[i] = td->tree_dqcoeff_buf[i];
+ }
+
+ if (!stat_generation_stage) {
+ const int leaf_factor = is_sb_size_128 ? 4 : 1;
+ const int leaf_nodes = 256 * leaf_factor;
+
+ // 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, &shared_bufs);
+ }
+
+ // 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,
+ &shared_bufs);
+ tree->block_size = square[square_index];
+ for (j = 0; j < 4; j++) tree->split[j] = this_pc++;
+ ++pc_tree_index;
+ }
+ ++square_index;
+ }
+ } else {
+ // Allocation for firstpass/LAP stage
+ // TODO(Mufaddal): refactor square_index to use a common block_size macro
+ // from firstpass.c
+ PC_TREE *const tree = &td->pc_tree[pc_tree_index];
+ square_index = 2;
+ alloc_tree_contexts(cm, tree, 16 << (2 * square_index), 1, &shared_bufs);
+ tree->block_size = square[square_index];
+ }
+
+ // Set up the root node for the applicable superblock size
+ td->pc_root = &td->pc_tree[tree_nodes - 1];
+#if CONFIG_INTERNAL_STATS
+ td->pc_root->none.best_mode_index = THR_INVALID;
+#endif // CONFIG_INTERNAL_STATS
+}
+
+void av1_free_pc_tree(const AV1_COMP *const cpi, ThreadData *td,
+ const int num_planes, BLOCK_SIZE sb_size) {
+ int stat_generation_stage = is_stat_generation_stage(cpi);
+ if (td->pc_tree != NULL) {
+ const int is_sb_size_128 = sb_size == BLOCK_128X128;
+ const int tree_nodes =
+ get_pc_tree_nodes(is_sb_size_128, stat_generation_stage);
+ for (int i = 0; i < tree_nodes; ++i) {
+ free_tree_contexts(&td->pc_tree[i], num_planes);
+ }
+ for (int i = 0; i < 3; ++i) {
+ aom_free(td->tree_coeff_buf[i]);
+ aom_free(td->tree_qcoeff_buf[i]);
+ aom_free(td->tree_dqcoeff_buf[i]);
+ td->tree_coeff_buf[i] = NULL;
+ td->tree_qcoeff_buf[i] = NULL;
+ td->tree_dqcoeff_buf[i] = NULL;
+ }
+ 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_best = src_ctx->mbmi_ext_best;
+
+ dst_ctx->num_4x4_blk = src_ctx->num_4x4_blk;
+ dst_ctx->skippable = src_ctx->skippable;
+#if CONFIG_INTERNAL_STATS
+ dst_ctx->best_mode_index = src_ctx->best_mode_index;
+#endif // CONFIG_INTERNAL_STATS
+
+ memcpy(dst_ctx->blk_skip, src_ctx->blk_skip,
+ sizeof(uint8_t) * src_ctx->num_4x4_blk);
+ av1_copy_array(dst_ctx->tx_type_map, src_ctx->tx_type_map,
+ 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->rd_stats = src_ctx->rd_stats;
+ 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->partition = src_ctx->partition;
+}
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