VP10: some changes to palette mode
Account for rounding in distortion calculation in k-means; carry out rounding before duplicates removal of base colors; replace numbers with macros; use prefix increment. Slight coding gain (<0.1%) on screen_content testset. Change-Id: Ie8bd241266da6b82c7b2874befc3a0c72b4fcd8c
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@ -285,7 +285,8 @@ const vpx_tree_index vp10_palette_size_tree[TREE_SIZE(PALETTE_SIZES)] = {
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};
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// TODO(huisu): tune these probs
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const vpx_prob vp10_default_palette_y_size_prob[10][PALETTE_SIZES - 1] = {
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const vpx_prob
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vp10_default_palette_y_size_prob[PALETTE_BLOCK_SIZES][PALETTE_SIZES - 1] = {
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{ 96, 89, 100, 64, 77, 130},
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{ 22, 15, 44, 16, 34, 82},
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{ 30, 19, 57, 18, 38, 86},
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@ -298,7 +299,8 @@ const vpx_prob vp10_default_palette_y_size_prob[10][PALETTE_SIZES - 1] = {
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{ 98, 105, 142, 63, 64, 152},
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};
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const vpx_prob vp10_default_palette_uv_size_prob[10][PALETTE_SIZES - 1] = {
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const vpx_prob
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vp10_default_palette_uv_size_prob[PALETTE_BLOCK_SIZES][PALETTE_SIZES - 1] = {
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{ 160, 196, 228, 213, 175, 230},
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{ 87, 148, 208, 141, 166, 163},
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{ 72, 151, 204, 139, 155, 161},
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@ -311,7 +313,9 @@ const vpx_prob vp10_default_palette_uv_size_prob[10][PALETTE_SIZES - 1] = {
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{ 72, 55, 66, 68, 79, 107},
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};
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const vpx_prob vp10_default_palette_y_mode_prob[10][3] = {
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const vpx_prob
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vp10_default_palette_y_mode_prob[PALETTE_BLOCK_SIZES][PALETTE_Y_MODE_CONTEXTS]
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= {
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{ 240, 180, 100, },
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{ 240, 180, 100, },
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{ 240, 180, 100, },
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@ -48,7 +48,7 @@ static const struct vp10_token palette_size_encodings[] = {
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{0, 1}, {2, 2}, {6, 3}, {14, 4}, {30, 5}, {62, 6}, {63, 6},
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};
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static const struct vp10_token
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palette_color_encodings[PALETTE_MAX_SIZE - 1][8] = {
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palette_color_encodings[PALETTE_MAX_SIZE - 1][PALETTE_MAX_SIZE] = {
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{{0, 1}, {1, 1}}, // 2 colors
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{{0, 1}, {2, 2}, {3, 2}}, // 3 colors
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{{0, 1}, {2, 2}, {6, 3}, {7, 3}}, // 4 colors
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@ -458,8 +458,8 @@ typedef struct VP10_COMP {
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int y_mode_costs[INTRA_MODES][INTRA_MODES][INTRA_MODES];
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int switchable_interp_costs[SWITCHABLE_FILTER_CONTEXTS][SWITCHABLE_FILTERS];
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int partition_cost[PARTITION_CONTEXTS][PARTITION_TYPES];
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int palette_y_size_cost[10][PALETTE_SIZES];
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int palette_uv_size_cost[10][PALETTE_SIZES];
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int palette_y_size_cost[PALETTE_BLOCK_SIZES][PALETTE_SIZES];
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int palette_uv_size_cost[PALETTE_BLOCK_SIZES][PALETTE_SIZES];
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int palette_y_color_cost[PALETTE_MAX_SIZE - 1][PALETTE_COLOR_CONTEXTS]
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[PALETTE_COLORS];
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int palette_uv_color_cost[PALETTE_MAX_SIZE - 1][PALETTE_COLOR_CONTEXTS]
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@ -8,14 +8,15 @@
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <math.h>
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#include "vp10/encoder/palette.h"
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static double calc_dist(const double *p1, const double *p2, int dim) {
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double dist = 0;
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int i = 0;
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for (i = 0; i < dim; i++) {
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dist = dist + (p1[i] - p2[i]) * (p1[i] - p2[i]);
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for (i = 0; i < dim; ++i) {
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dist = dist + (p1[i] - round(p2[i])) * (p1[i] - round(p2[i]));
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}
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return dist;
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}
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@ -25,10 +26,10 @@ void vp10_calc_indices(const double *data, const double *centroids,
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int i, j;
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double min_dist, this_dist;
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for (i = 0; i < n; i++) {
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for (i = 0; i < n; ++i) {
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min_dist = calc_dist(data + i * dim, centroids, dim);
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indices[i] = 0;
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for (j = 1; j < k; j++) {
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for (j = 1; j < k; ++j) {
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this_dist = calc_dist(data + i * dim, centroids + j * dim, dim);
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if (this_dist < min_dist) {
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min_dist = this_dist;
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@ -47,23 +48,23 @@ static void calc_centroids(const double *data, double *centroids,
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memset(count, 0, sizeof(count[0]) * k);
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memset(centroids, 0, sizeof(centroids[0]) * k * dim);
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for (i = 0; i < n; i++) {
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for (i = 0; i < n; ++i) {
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index = indices[i];
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assert(index < k);
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count[index]++;
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for (j = 0; j < dim; j++) {
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++count[index];
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for (j = 0; j < dim; ++j) {
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centroids[index * dim + j] += data[i * dim + j];
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}
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}
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for (i = 0; i < k; i++) {
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for (i = 0; i < k; ++i) {
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if (count[i] == 0) {
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// TODO(huisu): replace rand() with something else.
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memcpy(centroids + i * dim, data + (rand() % n) * dim,
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sizeof(centroids[0]) * dim);
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} else {
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const double norm = 1.0 / count[i];
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for (j = 0; j < dim; j++)
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for (j = 0; j < dim; ++j)
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centroids[i * dim + j] *= norm;
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}
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}
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@ -75,7 +76,7 @@ static double calc_total_dist(const double *data, const double *centroids,
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int i;
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(void) k;
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for (i = 0; i < n; i++)
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for (i = 0; i < n; ++i)
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dist += calc_dist(data + i * dim, centroids + indices[i] * dim, dim);
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return dist;
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@ -107,7 +108,7 @@ int vp10_k_means(const double *data, double *centroids, uint8_t *indices,
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memcpy(pre_centroids, centroids, sizeof(pre_centroids[0]) * k * dim);
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memcpy(pre_indices, indices, sizeof(pre_indices[0]) * n);
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pre_dist = this_dist;
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i++;
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++i;
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}
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return i;
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@ -169,7 +170,7 @@ int vp10_count_colors_highbd(const uint8_t *src8, int stride, int rows,
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for (r = 0; r < rows; ++r) {
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for (c = 0; c < cols; ++c) {
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val = src[r * stride + c];
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val_count[val]++;
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++val_count[val];
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}
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}
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@ -85,7 +85,7 @@ static void fill_mode_costs(VP10_COMP *cpi) {
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vp10_cost_tokens(cpi->switchable_interp_costs[i],
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fc->switchable_interp_prob[i], vp10_switchable_interp_tree);
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for (i = 0; i < 10; ++i) {
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for (i = 0; i < PALETTE_BLOCK_SIZES; ++i) {
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vp10_cost_tokens(cpi->palette_y_size_cost[i],
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vp10_default_palette_y_size_prob[i],
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vp10_palette_size_tree);
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@ -821,7 +821,8 @@ void rd_pick_palette_intra_sby(VP10_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bsize,
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vp10_k_means(data, centroids, indices, pre_indices, rows * cols,
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n, 1, max_itr);
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vp10_insertion_sort(centroids, n);
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for (i = 0; i < n; ++i)
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centroids[i] = round(centroids[i]);
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// remove duplicates
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i = 1;
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k = n;
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