generic-library/vpx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Cleaning up vp9_context_tree.c.

Browse Source 
Change-Id: I2d6389773e3c761cda62868735dc5dfbf267b49f
This commit is contained in:
Dmitry Kovalev 2014-05-01 15:23:35 -07:00
parent e05b92c0aa
commit e6a985153f
1 changed files with 46 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

91
vp9/encoder/vp9_context_tree.c
View File

@ -8,14 +8,13 @@
* be found in the AUTHORS file in the root of the source tree.
*/
#include "vp9/encoder/vp9_context_tree.h"
static const BLOCK_SIZE square[] = {
BLOCK_8X8,
BLOCK_16X16,
BLOCK_32X32,
BLOCK_64X64,
BLOCK_8X8,
BLOCK_16X16,
BLOCK_32X32,
BLOCK_64X64,
};
static void alloc_mode_context(VP9_COMMON *cm, int num_4x4_blk,
@ -62,23 +61,25 @@ static void free_mode_context(PICK_MODE_CONTEXT *ctx) {
}
}
}
static void free_tree_contexts(PC_TREE *this_pc) {
free_mode_context(&this_pc->none);
free_mode_context(&this_pc->horizontal[0]);
free_mode_context(&this_pc->horizontal[1]);
free_mode_context(&this_pc->vertical[0]);
free_mode_context(&this_pc->vertical[1]);
}
static void alloc_tree_contexts(VP9_COMMON *cm, PC_TREE *this_pc,
static void alloc_tree_contexts(VP9_COMMON *cm, PC_TREE *tree,
int num_4x4_blk) {
alloc_mode_context(cm, num_4x4_blk, &this_pc->none);
alloc_mode_context(cm, num_4x4_blk/2, &this_pc->horizontal[0]);
alloc_mode_context(cm, num_4x4_blk/2, &this_pc->vertical[0]);
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]);
/* TODO(Jbb): for 4x8 and 8x4 these allocated values are not used.
* Figure out a better way to do this. */
alloc_mode_context(cm, num_4x4_blk/2, &this_pc->horizontal[1]);
alloc_mode_context(cm, num_4x4_blk/2, &this_pc->vertical[1]);
alloc_mode_context(cm, num_4x4_blk/2, &tree->horizontal[1]);
alloc_mode_context(cm, num_4x4_blk/2, &tree->vertical[1]);
}
static void free_tree_contexts(PC_TREE *tree) {
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]);
}
// This function sets up a tree of contexts such that at each square
@ -97,9 +98,9 @@ void vp9_setup_pc_tree(VP9_COMMON *cm, MACROBLOCK *x) {
vpx_free(x->leaf_tree);
CHECK_MEM_ERROR(cm, x->leaf_tree, vpx_calloc(leaf_nodes,
sizeof(PICK_MODE_CONTEXT)));
sizeof(*x->leaf_tree)));
vpx_free(x->pc_tree);
CHECK_MEM_ERROR(cm, x->pc_tree, vpx_calloc(tree_nodes, sizeof(PC_TREE)));
CHECK_MEM_ERROR(cm, x->pc_tree, vpx_calloc(tree_nodes, sizeof(*x->pc_tree)));
this_pc = &x->pc_tree[0];
this_leaf = &x->leaf_tree[0];
@ -111,45 +112,45 @@ void vp9_setup_pc_tree(VP9_COMMON *cm, MACROBLOCK *x) {
// Sets up all the leaf nodes in the tree.
for (pc_tree_index = 0; pc_tree_index < leaf_nodes; ++pc_tree_index) {
x->pc_tree[pc_tree_index].block_size = square[0];
alloc_tree_contexts(cm, &x->pc_tree[pc_tree_index], 4);
x->pc_tree[pc_tree_index].leaf_split[0] = this_leaf++;
for (j = 1; j < 4; j++) {
x->pc_tree[pc_tree_index].leaf_split[j] =
x->pc_tree[pc_tree_index].leaf_split[0];
}
PC_TREE *const tree = &x->pc_tree[pc_tree_index];
tree->block_size = square[0];
alloc_tree_contexts(cm, tree, 4);
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 = 16; nodes > 0; nodes >>= 2, ++square_index) {
for (i = 0; i < nodes; ++pc_tree_index, ++i) {
alloc_tree_contexts(cm, &x->pc_tree[pc_tree_index],
4 << (2 * square_index));
x->pc_tree[pc_tree_index].block_size = square[square_index];
for (j = 0; j < 4; j++) {
x->pc_tree[pc_tree_index].split[j] = this_pc++;
}
for (nodes = 16; nodes > 0; nodes >>= 2) {
for (i = 0; i < nodes; ++i) {
PC_TREE *const tree = &x->pc_tree[pc_tree_index];
alloc_tree_contexts(cm, tree, 4 << (2 * square_index));
tree->block_size = square[square_index];
for (j = 0; j < 4; j++)
tree->split[j] = this_pc++;
++pc_tree_index;
}
++square_index;
}
x->pc_root = &x->pc_tree[tree_nodes-1];
x->pc_root = &x->pc_tree[tree_nodes - 1];
x->pc_root[0].none.best_mode_index = 2;
}
void vp9_free_pc_tree(MACROBLOCK *m) {
void vp9_free_pc_tree(MACROBLOCK *x) {
const int tree_nodes = 64 + 16 + 4 + 1;
int i;
// Set up all 4x4 mode contexts
for (i = 0; i < 64; ++i)
free_mode_context(&m->leaf_tree[i]);
free_mode_context(&x->leaf_tree[i]);
// Sets up all the leaf nodes in the tree.
for (i = 0; i < tree_nodes; i++) {
free_tree_contexts(&m->pc_tree[i]);
}
vpx_free(m->pc_tree);
m->pc_tree = 0;
vpx_free(m->leaf_tree);
m->leaf_tree = 0;
for (i = 0; i < tree_nodes; ++i)
free_tree_contexts(&x->pc_tree[i]);
vpx_free(x->pc_tree);
x->pc_tree = NULL;
vpx_free(x->leaf_tree);
x->leaf_tree = NULL;
}