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Fix some problems with reference pixels in angular intra prediction kvz_angular_pred_generic()

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This commit is contained in:
Marko Viitanen 2019-07-05 15:54:51 +03:00
parent 89ca2d4ba1
commit 0656c54cab
1 changed files with 16 additions and 10 deletions
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24
src/strategies/generic/intra-generic.c
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@ -85,7 +85,7 @@ static void kvz_angular_pred_generic(
};
// Temporary buffer for modes 11-25.
// It only needs to be big enough to hold indices from -width to width-1.
kvz_pixel tmp_ref[2 * 32];
kvz_pixel tmp_ref[2 * 128] = { 0 };
const int_fast8_t width = 1 << log2_width;
uint32_t pred_mode = intra_mode; // ToDo: handle WAIP
@ -127,12 +127,14 @@ static void kvz_angular_pred_generic(
int_fast32_t col_sample_disp = 128; // rounding for the ">> 8"
int_fast16_t inv_abs_sample_disp = modedisp2invsampledisp[abs(mode_disp)];
// TODO: add 'vertical_mode ? height : width' instead of 'width'
int_fast8_t most_negative_index = (width * sample_disp) >> 5;
for (int_fast8_t x = -2; x >= most_negative_index; --x) {
int_fast8_t most_negative_index = ((width-1) * sample_disp) >> 5;
for (int_fast8_t x = -1; x > most_negative_index; --x) {
col_sample_disp += inv_abs_sample_disp;
int_fast8_t side_index = col_sample_disp >> 8;
tmp_ref[x + width] = ref_side[side_index - 1];
tmp_ref[x + width - 1] = ref_side[side_index - 1];
}
tmp_ref[width + width - 1] = tmp_ref[width + width];
tmp_ref[most_negative_index + width - 1] = tmp_ref[most_negative_index + width];
}
else {
// sample_disp >= 0 means we don't need to refer to negative indices,
@ -150,8 +152,9 @@ static void kvz_angular_pred_generic(
int_fast8_t delta_int = delta_pos >> 5;
int_fast8_t delta_fract = delta_pos & (32 - 1);
if (abs(sample_disp) & 0x1F != 0) {
if ((abs(sample_disp) & 0x1F) != 0) {
// Luma Channel
if (channel_type == 0) {
int32_t ref_main_index = delta_int;
kvz_pixel p[4];
@ -191,30 +194,33 @@ static void kvz_angular_pred_generic(
// TODO: replace latter width with height
int scale = ((kvz_math_floor_log2(width) - 2 + kvz_math_floor_log2(width) - 2 + 2) >> 2);
// PDPC
if (pred_mode == 2 || pred_mode == 66) {
int wT = 16 >> MIN(31, ((y << 1) >> scale));
for (int x = 0; x < width; x++) {
int wL = 16 >> MIN(31, ((x << 1) >> scale));
if (wT + wL == 0) break;
int c = x + y + 1;
if (c >= 2 * width) { wL = 0; }
if (c >= 2 * width) { wT = 0; }
const kvz_pixel left = (wL != 0) ? ref_side[c] : 0;
const kvz_pixel top = (wT != 0) ? ref_main[c] : 0;
dst[y * width + x] = CLIP_TO_PIXEL((wL * left + wT * top + (64 - wL - wT) * dst[y * width + x] + 32) >> 6);
}
} else {
} else if (sample_disp == 0 || sample_disp >= 12) {
int inv_angle_sum_0 = 2;
for (int x = 0; x < width; x++) {
inv_angle_sum_0 += modedisp2invsampledisp[abs(mode_disp)];
int delta_pos_0 = inv_angle_sum_0 >> 2;
int delta_frac_0 = delta_pos_0 & 63;
int delta_int_0 = delta_pos_0 >> 6;
int delta_y = y + delta_int_0;
int delta_y = y + delta_int_0 + 1;
// TODO: convert to JVET_K0500_WAIP
if (delta_y > width + width - 2) break;
if (delta_y > width + width - 1) break;
int wL = 32 >> MIN(31, ((x << 1) >> scale));
if (wL == 0) break;
const kvz_pixel *p = ref_side + delta_y + 1;
const kvz_pixel *p = ref_side + delta_y - 1;
kvz_pixel left = p[delta_frac_0 >> 5];
dst[y * width + x] = CLIP_TO_PIXEL((wL * left + (64 - wL) * dst[y * width + x] + 32) >> 6);
}