summaryrefslogtreecommitdiffstats
path: root/media/libaom/src/av1/encoder/hash_motion.c
diff options
context:
space:
mode:
Diffstat (limited to 'media/libaom/src/av1/encoder/hash_motion.c')
-rw-r--r--media/libaom/src/av1/encoder/hash_motion.c482
1 files changed, 482 insertions, 0 deletions
diff --git a/media/libaom/src/av1/encoder/hash_motion.c b/media/libaom/src/av1/encoder/hash_motion.c
new file mode 100644
index 000000000..e85a516e8
--- /dev/null
+++ b/media/libaom/src/av1/encoder/hash_motion.c
@@ -0,0 +1,482 @@
+/*
+ * Copyright (c) 2018, 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 <assert.h>
+
+#include "config/av1_rtcd.h"
+
+#include "av1/encoder/block.h"
+#include "av1/encoder/hash.h"
+#include "av1/encoder/hash_motion.h"
+
+static const int crc_bits = 16;
+static const int block_size_bits = 3;
+
+static void hash_table_clear_all(hash_table *p_hash_table) {
+ if (p_hash_table->p_lookup_table == NULL) {
+ return;
+ }
+ int max_addr = 1 << (crc_bits + block_size_bits);
+ for (int i = 0; i < max_addr; i++) {
+ if (p_hash_table->p_lookup_table[i] != NULL) {
+ aom_vector_destroy(p_hash_table->p_lookup_table[i]);
+ aom_free(p_hash_table->p_lookup_table[i]);
+ p_hash_table->p_lookup_table[i] = NULL;
+ }
+ }
+}
+
+// TODO(youzhou@microsoft.com): is higher than 8 bits screen content supported?
+// If yes, fix this function
+static void get_pixels_in_1D_char_array_by_block_2x2(uint8_t *y_src, int stride,
+ uint8_t *p_pixels_in1D) {
+ uint8_t *p_pel = y_src;
+ int index = 0;
+ for (int i = 0; i < 2; i++) {
+ for (int j = 0; j < 2; j++) {
+ p_pixels_in1D[index++] = p_pel[j];
+ }
+ p_pel += stride;
+ }
+}
+
+static void get_pixels_in_1D_short_array_by_block_2x2(uint16_t *y_src,
+ int stride,
+ uint16_t *p_pixels_in1D) {
+ uint16_t *p_pel = y_src;
+ int index = 0;
+ for (int i = 0; i < 2; i++) {
+ for (int j = 0; j < 2; j++) {
+ p_pixels_in1D[index++] = p_pel[j];
+ }
+ p_pel += stride;
+ }
+}
+
+static int is_block_2x2_row_same_value(uint8_t *p) {
+ if (p[0] != p[1] || p[2] != p[3]) {
+ return 0;
+ }
+ return 1;
+}
+
+static int is_block16_2x2_row_same_value(uint16_t *p) {
+ if (p[0] != p[1] || p[2] != p[3]) {
+ return 0;
+ }
+ return 1;
+}
+
+static int is_block_2x2_col_same_value(uint8_t *p) {
+ if ((p[0] != p[2]) || (p[1] != p[3])) {
+ return 0;
+ }
+ return 1;
+}
+
+static int is_block16_2x2_col_same_value(uint16_t *p) {
+ if ((p[0] != p[2]) || (p[1] != p[3])) {
+ return 0;
+ }
+ return 1;
+}
+
+// the hash value (hash_value1 consists two parts, the first 3 bits relate to
+// the block size and the remaining 16 bits are the crc values. This fuction
+// is used to get the first 3 bits.
+static int hash_block_size_to_index(int block_size) {
+ switch (block_size) {
+ case 4: return 0;
+ case 8: return 1;
+ case 16: return 2;
+ case 32: return 3;
+ case 64: return 4;
+ case 128: return 5;
+ default: return -1;
+ }
+}
+
+void av1_hash_table_init(hash_table *p_hash_table, MACROBLOCK *x) {
+ if (x->g_crc_initialized == 0) {
+ av1_crc_calculator_init(&x->crc_calculator1, 24, 0x5D6DCB);
+ av1_crc_calculator_init(&x->crc_calculator2, 24, 0x864CFB);
+ x->g_crc_initialized = 1;
+ }
+ p_hash_table->p_lookup_table = NULL;
+}
+
+void av1_hash_table_destroy(hash_table *p_hash_table) {
+ hash_table_clear_all(p_hash_table);
+ aom_free(p_hash_table->p_lookup_table);
+ p_hash_table->p_lookup_table = NULL;
+}
+
+void av1_hash_table_create(hash_table *p_hash_table) {
+ if (p_hash_table->p_lookup_table != NULL) {
+ hash_table_clear_all(p_hash_table);
+ return;
+ }
+ const int max_addr = 1 << (crc_bits + block_size_bits);
+ p_hash_table->p_lookup_table =
+ (Vector **)aom_malloc(sizeof(p_hash_table->p_lookup_table[0]) * max_addr);
+ memset(p_hash_table->p_lookup_table, 0,
+ sizeof(p_hash_table->p_lookup_table[0]) * max_addr);
+}
+
+static void hash_table_add_to_table(hash_table *p_hash_table,
+ uint32_t hash_value,
+ block_hash *curr_block_hash) {
+ if (p_hash_table->p_lookup_table[hash_value] == NULL) {
+ p_hash_table->p_lookup_table[hash_value] =
+ aom_malloc(sizeof(p_hash_table->p_lookup_table[0][0]));
+ aom_vector_setup(p_hash_table->p_lookup_table[hash_value], 10,
+ sizeof(curr_block_hash[0]));
+ aom_vector_push_back(p_hash_table->p_lookup_table[hash_value],
+ curr_block_hash);
+ } else {
+ aom_vector_push_back(p_hash_table->p_lookup_table[hash_value],
+ curr_block_hash);
+ }
+}
+
+int32_t av1_hash_table_count(hash_table *p_hash_table, uint32_t hash_value) {
+ if (p_hash_table->p_lookup_table[hash_value] == NULL) {
+ return 0;
+ } else {
+ return (int32_t)(p_hash_table->p_lookup_table[hash_value]->size);
+ }
+}
+
+Iterator av1_hash_get_first_iterator(hash_table *p_hash_table,
+ uint32_t hash_value) {
+ assert(av1_hash_table_count(p_hash_table, hash_value) > 0);
+ return aom_vector_begin(p_hash_table->p_lookup_table[hash_value]);
+}
+
+int32_t av1_has_exact_match(hash_table *p_hash_table, uint32_t hash_value1,
+ uint32_t hash_value2) {
+ if (p_hash_table->p_lookup_table[hash_value1] == NULL) {
+ return 0;
+ }
+ Iterator iterator =
+ aom_vector_begin(p_hash_table->p_lookup_table[hash_value1]);
+ Iterator last = aom_vector_end(p_hash_table->p_lookup_table[hash_value1]);
+ for (; !iterator_equals(&iterator, &last); iterator_increment(&iterator)) {
+ if ((*(block_hash *)iterator_get(&iterator)).hash_value2 == hash_value2) {
+ return 1;
+ }
+ }
+ return 0;
+}
+
+void av1_generate_block_2x2_hash_value(const YV12_BUFFER_CONFIG *picture,
+ uint32_t *pic_block_hash[2],
+ int8_t *pic_block_same_info[3],
+ MACROBLOCK *x) {
+ const int width = 2;
+ const int height = 2;
+ const int x_end = picture->y_crop_width - width + 1;
+ const int y_end = picture->y_crop_height - height + 1;
+
+ const int length = width * 2;
+ if (picture->flags & YV12_FLAG_HIGHBITDEPTH) {
+ uint16_t p[4];
+ int pos = 0;
+ for (int y_pos = 0; y_pos < y_end; y_pos++) {
+ for (int x_pos = 0; x_pos < x_end; x_pos++) {
+ get_pixels_in_1D_short_array_by_block_2x2(
+ CONVERT_TO_SHORTPTR(picture->y_buffer) + y_pos * picture->y_stride +
+ x_pos,
+ picture->y_stride, p);
+ pic_block_same_info[0][pos] = is_block16_2x2_row_same_value(p);
+ pic_block_same_info[1][pos] = is_block16_2x2_col_same_value(p);
+
+ pic_block_hash[0][pos] = av1_get_crc_value(
+ &x->crc_calculator1, (uint8_t *)p, length * sizeof(p[0]));
+ pic_block_hash[1][pos] = av1_get_crc_value(
+ &x->crc_calculator2, (uint8_t *)p, length * sizeof(p[0]));
+ pos++;
+ }
+ pos += width - 1;
+ }
+ } else {
+ uint8_t p[4];
+ int pos = 0;
+ for (int y_pos = 0; y_pos < y_end; y_pos++) {
+ for (int x_pos = 0; x_pos < x_end; x_pos++) {
+ get_pixels_in_1D_char_array_by_block_2x2(
+ picture->y_buffer + y_pos * picture->y_stride + x_pos,
+ picture->y_stride, p);
+ pic_block_same_info[0][pos] = is_block_2x2_row_same_value(p);
+ pic_block_same_info[1][pos] = is_block_2x2_col_same_value(p);
+
+ pic_block_hash[0][pos] =
+ av1_get_crc_value(&x->crc_calculator1, p, length * sizeof(p[0]));
+ pic_block_hash[1][pos] =
+ av1_get_crc_value(&x->crc_calculator2, p, length * sizeof(p[0]));
+ pos++;
+ }
+ pos += width - 1;
+ }
+ }
+}
+
+void av1_generate_block_hash_value(const YV12_BUFFER_CONFIG *picture,
+ int block_size,
+ uint32_t *src_pic_block_hash[2],
+ uint32_t *dst_pic_block_hash[2],
+ int8_t *src_pic_block_same_info[3],
+ int8_t *dst_pic_block_same_info[3],
+ MACROBLOCK *x) {
+ const int pic_width = picture->y_crop_width;
+ const int x_end = picture->y_crop_width - block_size + 1;
+ const int y_end = picture->y_crop_height - block_size + 1;
+
+ const int src_size = block_size >> 1;
+ const int quad_size = block_size >> 2;
+
+ uint32_t p[4];
+ const int length = sizeof(p);
+
+ int pos = 0;
+ for (int y_pos = 0; y_pos < y_end; y_pos++) {
+ for (int x_pos = 0; x_pos < x_end; x_pos++) {
+ p[0] = src_pic_block_hash[0][pos];
+ p[1] = src_pic_block_hash[0][pos + src_size];
+ p[2] = src_pic_block_hash[0][pos + src_size * pic_width];
+ p[3] = src_pic_block_hash[0][pos + src_size * pic_width + src_size];
+ dst_pic_block_hash[0][pos] =
+ av1_get_crc_value(&x->crc_calculator1, (uint8_t *)p, length);
+
+ p[0] = src_pic_block_hash[1][pos];
+ p[1] = src_pic_block_hash[1][pos + src_size];
+ p[2] = src_pic_block_hash[1][pos + src_size * pic_width];
+ p[3] = src_pic_block_hash[1][pos + src_size * pic_width + src_size];
+ dst_pic_block_hash[1][pos] =
+ av1_get_crc_value(&x->crc_calculator2, (uint8_t *)p, length);
+
+ dst_pic_block_same_info[0][pos] =
+ src_pic_block_same_info[0][pos] &&
+ src_pic_block_same_info[0][pos + quad_size] &&
+ src_pic_block_same_info[0][pos + src_size] &&
+ src_pic_block_same_info[0][pos + src_size * pic_width] &&
+ src_pic_block_same_info[0][pos + src_size * pic_width + quad_size] &&
+ src_pic_block_same_info[0][pos + src_size * pic_width + src_size];
+
+ dst_pic_block_same_info[1][pos] =
+ src_pic_block_same_info[1][pos] &&
+ src_pic_block_same_info[1][pos + src_size] &&
+ src_pic_block_same_info[1][pos + quad_size * pic_width] &&
+ src_pic_block_same_info[1][pos + quad_size * pic_width + src_size] &&
+ src_pic_block_same_info[1][pos + src_size * pic_width] &&
+ src_pic_block_same_info[1][pos + src_size * pic_width + src_size];
+ pos++;
+ }
+ pos += block_size - 1;
+ }
+
+ if (block_size >= 4) {
+ const int size_minus_1 = block_size - 1;
+ pos = 0;
+ for (int y_pos = 0; y_pos < y_end; y_pos++) {
+ for (int x_pos = 0; x_pos < x_end; x_pos++) {
+ dst_pic_block_same_info[2][pos] =
+ (!dst_pic_block_same_info[0][pos] &&
+ !dst_pic_block_same_info[1][pos]) ||
+ (((x_pos & size_minus_1) == 0) && ((y_pos & size_minus_1) == 0));
+ pos++;
+ }
+ pos += block_size - 1;
+ }
+ }
+}
+
+void av1_add_to_hash_map_by_row_with_precal_data(hash_table *p_hash_table,
+ uint32_t *pic_hash[2],
+ int8_t *pic_is_same,
+ int pic_width, int pic_height,
+ int block_size) {
+ const int x_end = pic_width - block_size + 1;
+ const int y_end = pic_height - block_size + 1;
+
+ const int8_t *src_is_added = pic_is_same;
+ const uint32_t *src_hash[2] = { pic_hash[0], pic_hash[1] };
+
+ int add_value = hash_block_size_to_index(block_size);
+ assert(add_value >= 0);
+ add_value <<= crc_bits;
+ const int crc_mask = (1 << crc_bits) - 1;
+
+ for (int x_pos = 0; x_pos < x_end; x_pos++) {
+ for (int y_pos = 0; y_pos < y_end; y_pos++) {
+ const int pos = y_pos * pic_width + x_pos;
+ // valid data
+ if (src_is_added[pos]) {
+ block_hash curr_block_hash;
+ curr_block_hash.x = x_pos;
+ curr_block_hash.y = y_pos;
+
+ const uint32_t hash_value1 = (src_hash[0][pos] & crc_mask) + add_value;
+ curr_block_hash.hash_value2 = src_hash[1][pos];
+
+ hash_table_add_to_table(p_hash_table, hash_value1, &curr_block_hash);
+ }
+ }
+ }
+}
+
+int av1_hash_is_horizontal_perfect(const YV12_BUFFER_CONFIG *picture,
+ int block_size, int x_start, int y_start) {
+ const int stride = picture->y_stride;
+ const uint8_t *p = picture->y_buffer + y_start * stride + x_start;
+
+ if (picture->flags & YV12_FLAG_HIGHBITDEPTH) {
+ const uint16_t *p16 = CONVERT_TO_SHORTPTR(p);
+ for (int i = 0; i < block_size; i++) {
+ for (int j = 1; j < block_size; j++) {
+ if (p16[j] != p16[0]) {
+ return 0;
+ }
+ }
+ p16 += stride;
+ }
+ } else {
+ for (int i = 0; i < block_size; i++) {
+ for (int j = 1; j < block_size; j++) {
+ if (p[j] != p[0]) {
+ return 0;
+ }
+ }
+ p += stride;
+ }
+ }
+
+ return 1;
+}
+
+int av1_hash_is_vertical_perfect(const YV12_BUFFER_CONFIG *picture,
+ int block_size, int x_start, int y_start) {
+ const int stride = picture->y_stride;
+ const uint8_t *p = picture->y_buffer + y_start * stride + x_start;
+
+ if (picture->flags & YV12_FLAG_HIGHBITDEPTH) {
+ const uint16_t *p16 = CONVERT_TO_SHORTPTR(p);
+ for (int i = 0; i < block_size; i++) {
+ for (int j = 1; j < block_size; j++) {
+ if (p16[j * stride + i] != p16[i]) {
+ return 0;
+ }
+ }
+ }
+ } else {
+ for (int i = 0; i < block_size; i++) {
+ for (int j = 1; j < block_size; j++) {
+ if (p[j * stride + i] != p[i]) {
+ return 0;
+ }
+ }
+ }
+ }
+ return 1;
+}
+
+void av1_get_block_hash_value(uint8_t *y_src, int stride, int block_size,
+ uint32_t *hash_value1, uint32_t *hash_value2,
+ int use_highbitdepth, MACROBLOCK *x) {
+ uint32_t to_hash[4];
+ const int add_value = hash_block_size_to_index(block_size) << crc_bits;
+ assert(add_value >= 0);
+ const int crc_mask = (1 << crc_bits) - 1;
+
+ // 2x2 subblock hash values in current CU
+ int sub_block_in_width = (block_size >> 1);
+ if (use_highbitdepth) {
+ uint16_t pixel_to_hash[4];
+ uint16_t *y16_src = CONVERT_TO_SHORTPTR(y_src);
+ for (int y_pos = 0; y_pos < block_size; y_pos += 2) {
+ for (int x_pos = 0; x_pos < block_size; x_pos += 2) {
+ int pos = (y_pos >> 1) * sub_block_in_width + (x_pos >> 1);
+ get_pixels_in_1D_short_array_by_block_2x2(
+ y16_src + y_pos * stride + x_pos, stride, pixel_to_hash);
+ assert(pos < AOM_BUFFER_SIZE_FOR_BLOCK_HASH);
+ x->hash_value_buffer[0][0][pos] =
+ av1_get_crc_value(&x->crc_calculator1, (uint8_t *)pixel_to_hash,
+ sizeof(pixel_to_hash));
+ x->hash_value_buffer[1][0][pos] =
+ av1_get_crc_value(&x->crc_calculator2, (uint8_t *)pixel_to_hash,
+ sizeof(pixel_to_hash));
+ }
+ }
+ } else {
+ uint8_t pixel_to_hash[4];
+ for (int y_pos = 0; y_pos < block_size; y_pos += 2) {
+ for (int x_pos = 0; x_pos < block_size; x_pos += 2) {
+ int pos = (y_pos >> 1) * sub_block_in_width + (x_pos >> 1);
+ get_pixels_in_1D_char_array_by_block_2x2(y_src + y_pos * stride + x_pos,
+ stride, pixel_to_hash);
+ assert(pos < AOM_BUFFER_SIZE_FOR_BLOCK_HASH);
+ x->hash_value_buffer[0][0][pos] = av1_get_crc_value(
+ &x->crc_calculator1, pixel_to_hash, sizeof(pixel_to_hash));
+ x->hash_value_buffer[1][0][pos] = av1_get_crc_value(
+ &x->crc_calculator2, pixel_to_hash, sizeof(pixel_to_hash));
+ }
+ }
+ }
+
+ int src_sub_block_in_width = sub_block_in_width;
+ sub_block_in_width >>= 1;
+
+ int src_idx = 1;
+ int dst_idx = 0;
+
+ // 4x4 subblock hash values to current block hash values
+ for (int sub_width = 4; sub_width <= block_size; sub_width *= 2) {
+ src_idx = 1 - src_idx;
+ dst_idx = 1 - dst_idx;
+
+ int dst_pos = 0;
+ for (int y_pos = 0; y_pos < sub_block_in_width; y_pos++) {
+ for (int x_pos = 0; x_pos < sub_block_in_width; x_pos++) {
+ int srcPos = (y_pos << 1) * src_sub_block_in_width + (x_pos << 1);
+
+ assert(srcPos + 1 < AOM_BUFFER_SIZE_FOR_BLOCK_HASH);
+ assert(srcPos + src_sub_block_in_width + 1 <
+ AOM_BUFFER_SIZE_FOR_BLOCK_HASH);
+ assert(dst_pos < AOM_BUFFER_SIZE_FOR_BLOCK_HASH);
+ to_hash[0] = x->hash_value_buffer[0][src_idx][srcPos];
+ to_hash[1] = x->hash_value_buffer[0][src_idx][srcPos + 1];
+ to_hash[2] =
+ x->hash_value_buffer[0][src_idx][srcPos + src_sub_block_in_width];
+ to_hash[3] = x->hash_value_buffer[0][src_idx]
+ [srcPos + src_sub_block_in_width + 1];
+
+ x->hash_value_buffer[0][dst_idx][dst_pos] = av1_get_crc_value(
+ &x->crc_calculator1, (uint8_t *)to_hash, sizeof(to_hash));
+
+ to_hash[0] = x->hash_value_buffer[1][src_idx][srcPos];
+ to_hash[1] = x->hash_value_buffer[1][src_idx][srcPos + 1];
+ to_hash[2] =
+ x->hash_value_buffer[1][src_idx][srcPos + src_sub_block_in_width];
+ to_hash[3] = x->hash_value_buffer[1][src_idx]
+ [srcPos + src_sub_block_in_width + 1];
+ x->hash_value_buffer[1][dst_idx][dst_pos] = av1_get_crc_value(
+ &x->crc_calculator2, (uint8_t *)to_hash, sizeof(to_hash));
+ dst_pos++;
+ }
+ }
+
+ src_sub_block_in_width = sub_block_in_width;
+ sub_block_in_width >>= 1;
+ }
+
+ *hash_value1 = (x->hash_value_buffer[0][dst_idx][0] & crc_mask) + add_value;
+ *hash_value2 = x->hash_value_buffer[1][dst_idx][0];
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 18:14:50 +0000