diff options
Diffstat (limited to 'third_party/aom/av1/encoder/context_tree.c')
| -rw-r--r-- | third_party/aom/av1/encoder/context_tree.c | 331 |
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; +} |