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

Simplifying partition context calculation.

Browse Source 
Reversing bit order of partition_context_lookup, and modifying accordingly
update_partition_context() and partition_plane_context().

Change-Id: I64a11f1a94962a3bf217de2f50698cb781db71a5
This commit is contained in:
Dmitry Kovalev 2013-11-19 11:17:30 -08:00
parent 953b1e9683
commit f6ec323906
2 changed files with 28 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
vp9/common/vp9_common_data.c
View File

@ -123,8 +123,6 @@ const TX_SIZE tx_mode_to_biggest_tx_size[TX_MODES] = {
TX_32X32, // TX_MODE_SELECT TX_32X32, // TX_MODE_SELECT
}; };
const BLOCK_SIZE ss_size_lookup[BLOCK_SIZES][2][2] = { const BLOCK_SIZE ss_size_lookup[BLOCK_SIZES][2][2] = {
// ss_x == 0 ss_x == 0 ss_x == 1 ss_x == 1 // ss_x == 0 ss_x == 0 ss_x == 1 ss_x == 1
// ss_y == 0 ss_y == 1 ss_y == 0 ss_y == 1 // ss_y == 0 ss_y == 1 ss_y == 0 ss_y == 1
@ -144,23 +142,23 @@ const BLOCK_SIZE ss_size_lookup[BLOCK_SIZES][2][2] = {
}; };
// Generates 4 bit field in which each bit set to 1 represents // Generates 4 bit field in which each bit set to 1 represents
// a blocksize partition 1111 means we split 8x8, 16x16, 32x32 // a blocksize partition 1111 means we split 64x64, 32x32, 16x16
// and 64x64. 0001 means we just split the 64x64... // and 8x8. 1000 means we just split the 64x64 to 32x32
const struct { const struct {
PARTITION_CONTEXT above; PARTITION_CONTEXT above;
PARTITION_CONTEXT left; PARTITION_CONTEXT left;
} partition_context_lookup[BLOCK_SIZES]= { } partition_context_lookup[BLOCK_SIZES]= {
{15, 15}, // 4X4 {15, 15}, // 4X4 - {0b1111, 0b1111}
{15, 7}, // 4X8 {15, 14}, // 4X8 - {0b1111, 0b1110}
{7, 15}, // 8X4 {14, 15}, // 8X4 - {0b1110, 0b1111}
{7, 7}, // 8X8 {14, 14}, // 8X8 - {0b1110, 0b1110}
{7, 3}, // 8X16 {14, 12}, // 8X16 - {0b1110, 0b1100}
{3, 7}, // 16X8 {12, 14}, // 16X8 - {0b1100, 0b1110}
{3, 3}, // 16X16 {12, 12}, // 16X16 - {0b1100, 0b1100}
{3, 1}, // 16X32 {12, 8 }, // 16X32 - {0b1100, 0b1000}
{1, 3}, // 32X16 {8, 12}, // 32X16 - {0b1000, 0b1100}
{1, 1}, // 32X32 {8, 8 }, // 32X32 - {0b1000, 0b1000}
{1, 0}, // 32X64 {8, 0 }, // 32X64 - {0b1000, 0b0000}
{0, 1}, // 64X32 {0, 8 }, // 64X32 - {0b0000, 0b1000}
{0, 0}, // 64X64 {0, 0 }, // 64X64 - {0b0000, 0b0000}
}; };

29
vp9/common/vp9_onyxc_int.h
View File

@ -303,43 +303,40 @@ static INLINE int frame_is_intra_only(const VP9_COMMON *const cm) {
static INLINE void update_partition_context( static INLINE void update_partition_context(
PARTITION_CONTEXT *above_seg_context, PARTITION_CONTEXT *above_seg_context,
PARTITION_CONTEXT left_seg_context[8], PARTITION_CONTEXT left_seg_context[8],
int mi_row, int mi_col, int mi_row, int mi_col, BLOCK_SIZE subsize, BLOCK_SIZE bsize) {
BLOCK_SIZE sb_type, PARTITION_CONTEXT *const above_ctx = above_seg_context + mi_col;
BLOCK_SIZE sb_size) { PARTITION_CONTEXT *const left_ctx = left_seg_context + (mi_row & MI_MASK);
PARTITION_CONTEXT *above_ctx = above_seg_context + mi_col;
PARTITION_CONTEXT *left_ctx = left_seg_context + (mi_row & MI_MASK);
const int bsl = b_width_log2(sb_size), bs = (1 << bsl) / 2; // num_4x4_blocks_wide_lookup[bsize] / 2
const int bs = num_8x8_blocks_wide_lookup[bsize];
// update the partition context at the end notes. set partition bits // update the partition context at the end notes. set partition bits
// of block sizes larger than the current one to be one, and partition // of block sizes larger than the current one to be one, and partition
// bits of smaller block sizes to be zero. // bits of smaller block sizes to be zero.
vpx_memset(above_ctx, partition_context_lookup[sb_type].above, bs); vpx_memset(above_ctx, partition_context_lookup[subsize].above, bs);
vpx_memset(left_ctx, partition_context_lookup[sb_type].left, bs); vpx_memset(left_ctx, partition_context_lookup[subsize].left, bs);
} }
static INLINE int partition_plane_context( static INLINE int partition_plane_context(
const PARTITION_CONTEXT *above_seg_context, const PARTITION_CONTEXT *above_seg_context,
const PARTITION_CONTEXT left_seg_context[8], const PARTITION_CONTEXT left_seg_context[8],
int mi_row, int mi_col, int mi_row, int mi_col, BLOCK_SIZE bsize) {
BLOCK_SIZE sb_type) {
const PARTITION_CONTEXT *above_ctx = above_seg_context + mi_col; const PARTITION_CONTEXT *above_ctx = above_seg_context + mi_col;
const PARTITION_CONTEXT *left_ctx = left_seg_context + (mi_row & MI_MASK); const PARTITION_CONTEXT *left_ctx = left_seg_context + (mi_row & MI_MASK);
int bsl = mi_width_log2(sb_type), bs = 1 << bsl; const int bsl = mi_width_log2(bsize);
const int bs = 1 << bsl;
int above = 0, left = 0, i; int above = 0, left = 0, i;
int boffset = mi_width_log2(BLOCK_64X64) - bsl;
assert(mi_width_log2(sb_type) == mi_height_log2(sb_type)); assert(mi_width_log2(bsize) == mi_height_log2(bsize));
assert(bsl >= 0); assert(bsl >= 0);
assert(boffset >= 0);
for (i = 0; i < bs; i++) { for (i = 0; i < bs; i++) {
above |= above_ctx[i]; above |= above_ctx[i];
left |= left_ctx[i]; left |= left_ctx[i];
} }
above = (above & (1 << boffset)) > 0; above = (above & bs) > 0;
left = (left & (1 << boffset)) > 0; left = (left & bs) > 0;
return (left * 2 + above) + bsl * PARTITION_PLOFFSET; return (left * 2 + above) + bsl * PARTITION_PLOFFSET;
} }