generic-library/vpx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
29d0cc2431
vpx/vp9/encoder/vp9_resize.c
Zoe Liu 7186a2dd86 Code refactor on InterpKernel 
It in essence refactors the code for both the interpolation
filtering and the convolution. This change includes the moving
of all the files as well as the changing of the code from vp9_
prefix to vpx_ prefix accordingly, for underneath architectures:
(1) x86;
(2) arm/neon; and
(3) mips/msa.
The work on mips/drsp2 will be done in a separate change list.

Change-Id: Ic3ce7fb7f81210db7628b373c73553db68793c46
2015-07-31 10:27:33 -07:00

929 lines
33 KiB
C
Raw Blame History

/*
* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <assert.h>
#include <limits.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if CONFIG_VP9_HIGHBITDEPTH
#include "vpx_dsp/vpx_dsp_common.h"
#endif // CONFIG_VP9_HIGHBITDEPTH
#include "vpx_ports/mem.h"
#include "vp9/common/vp9_common.h"
#include "vp9/encoder/vp9_resize.h"
#define FILTER_BITS 7
#define INTERP_TAPS 8
#define SUBPEL_BITS 5
#define SUBPEL_MASK ((1 << SUBPEL_BITS) - 1)
#define INTERP_PRECISION_BITS 32
typedef int16_t interp_kernel[INTERP_TAPS];
// Filters for interpolation (0.5-band) - note this also filters integer pels.
static const interp_kernel filteredinterp_filters500[(1 << SUBPEL_BITS)] = {
{-3, 0, 35, 64, 35, 0, -3, 0},
{-3, -1, 34, 64, 36, 1, -3, 0},
{-3, -1, 32, 64, 38, 1, -3, 0},
{-2, -2, 31, 63, 39, 2, -3, 0},
{-2, -2, 29, 63, 41, 2, -3, 0},
{-2, -2, 28, 63, 42, 3, -4, 0},
{-2, -3, 27, 63, 43, 4, -4, 0},
{-2, -3, 25, 62, 45, 5, -4, 0},
{-2, -3, 24, 62, 46, 5, -4, 0},
{-2, -3, 23, 61, 47, 6, -4, 0},
{-2, -3, 21, 60, 49, 7, -4, 0},
{-1, -4, 20, 60, 50, 8, -4, -1},
{-1, -4, 19, 59, 51, 9, -4, -1},
{-1, -4, 17, 58, 52, 10, -4, 0},
{-1, -4, 16, 57, 53, 12, -4, -1},
{-1, -4, 15, 56, 54, 13, -4, -1},
{-1, -4, 14, 55, 55, 14, -4, -1},
{-1, -4, 13, 54, 56, 15, -4, -1},
{-1, -4, 12, 53, 57, 16, -4, -1},
{0, -4, 10, 52, 58, 17, -4, -1},
{-1, -4, 9, 51, 59, 19, -4, -1},
{-1, -4, 8, 50, 60, 20, -4, -1},
{0, -4, 7, 49, 60, 21, -3, -2},
{0, -4, 6, 47, 61, 23, -3, -2},
{0, -4, 5, 46, 62, 24, -3, -2},
{0, -4, 5, 45, 62, 25, -3, -2},
{0, -4, 4, 43, 63, 27, -3, -2},
{0, -4, 3, 42, 63, 28, -2, -2},
{0, -3, 2, 41, 63, 29, -2, -2},
{0, -3, 2, 39, 63, 31, -2, -2},
{0, -3, 1, 38, 64, 32, -1, -3},
{0, -3, 1, 36, 64, 34, -1, -3}
};
// Filters for interpolation (0.625-band) - note this also filters integer pels.
static const interp_kernel filteredinterp_filters625[(1 << SUBPEL_BITS)] = {
{-1, -8, 33, 80, 33, -8, -1, 0},
{-1, -8, 30, 80, 35, -8, -1, 1},
{-1, -8, 28, 80, 37, -7, -2, 1},
{0, -8, 26, 79, 39, -7, -2, 1},
{0, -8, 24, 79, 41, -7, -2, 1},
{0, -8, 22, 78, 43, -6, -2, 1},
{0, -8, 20, 78, 45, -5, -3, 1},
{0, -8, 18, 77, 48, -5, -3, 1},
{0, -8, 16, 76, 50, -4, -3, 1},
{0, -8, 15, 75, 52, -3, -4, 1},
{0, -7, 13, 74, 54, -3, -4, 1},
{0, -7, 11, 73, 56, -2, -4, 1},
{0, -7, 10, 71, 58, -1, -4, 1},
{1, -7, 8, 70, 60, 0, -5, 1},
{1, -6, 6, 68, 62, 1, -5, 1},
{1, -6, 5, 67, 63, 2, -5, 1},
{1, -6, 4, 65, 65, 4, -6, 1},
{1, -5, 2, 63, 67, 5, -6, 1},
{1, -5, 1, 62, 68, 6, -6, 1},
{1, -5, 0, 60, 70, 8, -7, 1},
{1, -4, -1, 58, 71, 10, -7, 0},
{1, -4, -2, 56, 73, 11, -7, 0},
{1, -4, -3, 54, 74, 13, -7, 0},
{1, -4, -3, 52, 75, 15, -8, 0},
{1, -3, -4, 50, 76, 16, -8, 0},
{1, -3, -5, 48, 77, 18, -8, 0},
{1, -3, -5, 45, 78, 20, -8, 0},
{1, -2, -6, 43, 78, 22, -8, 0},
{1, -2, -7, 41, 79, 24, -8, 0},
{1, -2, -7, 39, 79, 26, -8, 0},
{1, -2, -7, 37, 80, 28, -8, -1},
{1, -1, -8, 35, 80, 30, -8, -1},
};
// Filters for interpolation (0.75-band) - note this also filters integer pels.
static const interp_kernel filteredinterp_filters750[(1 << SUBPEL_BITS)] = {
{2, -11, 25, 96, 25, -11, 2, 0},
{2, -11, 22, 96, 28, -11, 2, 0},
{2, -10, 19, 95, 31, -11, 2, 0},
{2, -10, 17, 95, 34, -12, 2, 0},
{2, -9, 14, 94, 37, -12, 2, 0},
{2, -8, 12, 93, 40, -12, 1, 0},
{2, -8, 9, 92, 43, -12, 1, 1},
{2, -7, 7, 91, 46, -12, 1, 0},
{2, -7, 5, 90, 49, -12, 1, 0},
{2, -6, 3, 88, 52, -12, 0, 1},
{2, -5, 1, 86, 55, -12, 0, 1},
{2, -5, -1, 84, 58, -11, 0, 1},
{2, -4, -2, 82, 61, -11, -1, 1},
{2, -4, -4, 80, 64, -10, -1, 1},
{1, -3, -5, 77, 67, -9, -1, 1},
{1, -3, -6, 75, 70, -8, -2, 1},
{1, -2, -7, 72, 72, -7, -2, 1},
{1, -2, -8, 70, 75, -6, -3, 1},
{1, -1, -9, 67, 77, -5, -3, 1},
{1, -1, -10, 64, 80, -4, -4, 2},
{1, -1, -11, 61, 82, -2, -4, 2},
{1, 0, -11, 58, 84, -1, -5, 2},
{1, 0, -12, 55, 86, 1, -5, 2},
{1, 0, -12, 52, 88, 3, -6, 2},
{0, 1, -12, 49, 90, 5, -7, 2},
{0, 1, -12, 46, 91, 7, -7, 2},
{1, 1, -12, 43, 92, 9, -8, 2},
{0, 1, -12, 40, 93, 12, -8, 2},
{0, 2, -12, 37, 94, 14, -9, 2},
{0, 2, -12, 34, 95, 17, -10, 2},
{0, 2, -11, 31, 95, 19, -10, 2},
{0, 2, -11, 28, 96, 22, -11, 2}
};
// Filters for interpolation (0.875-band) - note this also filters integer pels.
static const interp_kernel filteredinterp_filters875[(1 << SUBPEL_BITS)] = {
{3, -8, 13, 112, 13, -8, 3, 0},
{3, -7, 10, 112, 17, -9, 3, -1},
{2, -6, 7, 111, 21, -9, 3, -1},
{2, -5, 4, 111, 24, -10, 3, -1},
{2, -4, 1, 110, 28, -11, 3, -1},
{1, -3, -1, 108, 32, -12, 4, -1},
{1, -2, -3, 106, 36, -13, 4, -1},
{1, -1, -6, 105, 40, -14, 4, -1},
{1, -1, -7, 102, 44, -14, 4, -1},
{1, 0, -9, 100, 48, -15, 4, -1},
{1, 1, -11, 97, 53, -16, 4, -1},
{0, 1, -12, 95, 57, -16, 4, -1},
{0, 2, -13, 91, 61, -16, 4, -1},
{0, 2, -14, 88, 65, -16, 4, -1},
{0, 3, -15, 84, 69, -17, 4, 0},
{0, 3, -16, 81, 73, -16, 3, 0},
{0, 3, -16, 77, 77, -16, 3, 0},
{0, 3, -16, 73, 81, -16, 3, 0},
{0, 4, -17, 69, 84, -15, 3, 0},
{-1, 4, -16, 65, 88, -14, 2, 0},
{-1, 4, -16, 61, 91, -13, 2, 0},
{-1, 4, -16, 57, 95, -12, 1, 0},
{-1, 4, -16, 53, 97, -11, 1, 1},
{-1, 4, -15, 48, 100, -9, 0, 1},
{-1, 4, -14, 44, 102, -7, -1, 1},
{-1, 4, -14, 40, 105, -6, -1, 1},
{-1, 4, -13, 36, 106, -3, -2, 1},
{-1, 4, -12, 32, 108, -1, -3, 1},
{-1, 3, -11, 28, 110, 1, -4, 2},
{-1, 3, -10, 24, 111, 4, -5, 2},
{-1, 3, -9, 21, 111, 7, -6, 2},
{-1, 3, -9, 17, 112, 10, -7, 3}
};
// Filters for interpolation (full-band) - no filtering for integer pixels
static const interp_kernel filteredinterp_filters1000[(1 << SUBPEL_BITS)] = {
{0, 0, 0, 128, 0, 0, 0, 0},
{0, 1, -3, 128, 3, -1, 0, 0},
{-1, 2, -6, 127, 7, -2, 1, 0},
{-1, 3, -9, 126, 12, -4, 1, 0},
{-1, 4, -12, 125, 16, -5, 1, 0},
{-1, 4, -14, 123, 20, -6, 2, 0},
{-1, 5, -15, 120, 25, -8, 2, 0},
{-1, 5, -17, 118, 30, -9, 3, -1},
{-1, 6, -18, 114, 35, -10, 3, -1},
{-1, 6, -19, 111, 41, -12, 3, -1},
{-1, 6, -20, 107, 46, -13, 4, -1},
{-1, 6, -21, 103, 52, -14, 4, -1},
{-1, 6, -21, 99, 57, -16, 5, -1},
{-1, 6, -21, 94, 63, -17, 5, -1},
{-1, 6, -20, 89, 68, -18, 5, -1},
{-1, 6, -20, 84, 73, -19, 6, -1},
{-1, 6, -20, 79, 79, -20, 6, -1},
{-1, 6, -19, 73, 84, -20, 6, -1},
{-1, 5, -18, 68, 89, -20, 6, -1},
{-1, 5, -17, 63, 94, -21, 6, -1},
{-1, 5, -16, 57, 99, -21, 6, -1},
{-1, 4, -14, 52, 103, -21, 6, -1},
{-1, 4, -13, 46, 107, -20, 6, -1},
{-1, 3, -12, 41, 111, -19, 6, -1},
{-1, 3, -10, 35, 114, -18, 6, -1},
{-1, 3, -9, 30, 118, -17, 5, -1},
{0, 2, -8, 25, 120, -15, 5, -1},
{0, 2, -6, 20, 123, -14, 4, -1},
{0, 1, -5, 16, 125, -12, 4, -1},
{0, 1, -4, 12, 126, -9, 3, -1},
{0, 1, -2, 7, 127, -6, 2, -1},
{0, 0, -1, 3, 128, -3, 1, 0}
};
// Filters for factor of 2 downsampling.
static const int16_t vp9_down2_symeven_half_filter[] = {56, 12, -3, -1};
static const int16_t vp9_down2_symodd_half_filter[] = {64, 35, 0, -3};
static const interp_kernel *choose_interp_filter(int inlength, int outlength) {
int outlength16 = outlength * 16;
if (outlength16 >= inlength * 16)
return filteredinterp_filters1000;
else if (outlength16 >= inlength * 13)
return filteredinterp_filters875;
else if (outlength16 >= inlength * 11)
return filteredinterp_filters750;
else if (outlength16 >= inlength * 9)
return filteredinterp_filters625;
else
return filteredinterp_filters500;
}
static void interpolate(const uint8_t *const input, int inlength,
uint8_t *output, int outlength) {
const int64_t delta = (((uint64_t)inlength << 32) + outlength / 2) /
outlength;
const int64_t offset = inlength > outlength ?
(((int64_t)(inlength - outlength) << 31) + outlength / 2) / outlength :
-(((int64_t)(outlength - inlength) << 31) + outlength / 2) / outlength;
uint8_t *optr = output;
int x, x1, x2, sum, k, int_pel, sub_pel;
int64_t y;
const interp_kernel *interp_filters =
choose_interp_filter(inlength, outlength);
x = 0;
y = offset;
while ((y >> INTERP_PRECISION_BITS) < (INTERP_TAPS / 2 - 1)) {
x++;
y += delta;
}
x1 = x;
x = outlength - 1;
y = delta * x + offset;
while ((y >> INTERP_PRECISION_BITS) +
(int64_t)(INTERP_TAPS / 2) >= inlength) {
x--;
y -= delta;
}
x2 = x;
if (x1 > x2) {
for (x = 0, y = offset; x < outlength; ++x, y += delta) {
const int16_t *filter;
int_pel = y >> INTERP_PRECISION_BITS;
sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK;
filter = interp_filters[sub_pel];
sum = 0;
for (k = 0; k < INTERP_TAPS; ++k) {
const int pk = int_pel - INTERP_TAPS / 2 + 1 + k;
sum += filter[k] * input[(pk < 0 ? 0 :
(pk >= inlength ? inlength - 1 : pk))];
}
*optr++ = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS));
}
} else {
// Initial part.
for (x = 0, y = offset; x < x1; ++x, y += delta) {
const int16_t *filter;
int_pel = y >> INTERP_PRECISION_BITS;
sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK;
filter = interp_filters[sub_pel];
sum = 0;
for (k = 0; k < INTERP_TAPS; ++k)
sum += filter[k] * input[(int_pel - INTERP_TAPS / 2 + 1 + k < 0 ?
0 :
int_pel - INTERP_TAPS / 2 + 1 + k)];
*optr++ = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS));
}
// Middle part.
for (; x <= x2; ++x, y += delta) {
const int16_t *filter;
int_pel = y >> INTERP_PRECISION_BITS;
sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK;
filter = interp_filters[sub_pel];
sum = 0;
for (k = 0; k < INTERP_TAPS; ++k)
sum += filter[k] * input[int_pel - INTERP_TAPS / 2 + 1 + k];
*optr++ = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS));
}
// End part.
for (; x < outlength; ++x, y += delta) {
const int16_t *filter;
int_pel = y >> INTERP_PRECISION_BITS;
sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK;
filter = interp_filters[sub_pel];
sum = 0;
for (k = 0; k < INTERP_TAPS; ++k)
sum += filter[k] * input[(int_pel - INTERP_TAPS / 2 + 1 + k >=
inlength ? inlength - 1 :
int_pel - INTERP_TAPS / 2 + 1 + k)];
*optr++ = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS));
}
}
}
static void down2_symeven(const uint8_t *const input, int length,
uint8_t *output) {
// Actual filter len = 2 * filter_len_half.
const int16_t *filter = vp9_down2_symeven_half_filter;
const int filter_len_half = sizeof(vp9_down2_symeven_half_filter) / 2;
int i, j;
uint8_t *optr = output;
int l1 = filter_len_half;
int l2 = (length - filter_len_half);
l1 += (l1 & 1);
l2 += (l2 & 1);
if (l1 > l2) {
// Short input length.
for (i = 0; i < length; i += 2) {
int sum = (1 << (FILTER_BITS - 1));
for (j = 0; j < filter_len_half; ++j) {
sum += (input[(i - j < 0 ? 0 : i - j)] +
input[(i + 1 + j >= length ? length - 1 : i + 1 + j)]) *
filter[j];
}
sum >>= FILTER_BITS;
*optr++ = clip_pixel(sum);
}
} else {
// Initial part.
for (i = 0; i < l1; i += 2) {
int sum = (1 << (FILTER_BITS - 1));
for (j = 0; j < filter_len_half; ++j) {
sum += (input[(i - j < 0 ? 0 : i - j)] + input[i + 1 + j]) * filter[j];
}
sum >>= FILTER_BITS;
*optr++ = clip_pixel(sum);
}
// Middle part.
for (; i < l2; i += 2) {
int sum = (1 << (FILTER_BITS - 1));
for (j = 0; j < filter_len_half; ++j) {
sum += (input[i - j] + input[i + 1 + j]) * filter[j];
}
sum >>= FILTER_BITS;
*optr++ = clip_pixel(sum);
}
// End part.
for (; i < length; i += 2) {
int sum = (1 << (FILTER_BITS - 1));
for (j = 0; j < filter_len_half; ++j) {
sum += (input[i - j] +
input[(i + 1 + j >= length ? length - 1 : i + 1 + j)]) *
filter[j];
}
sum >>= FILTER_BITS;
*optr++ = clip_pixel(sum);
}
}
}
static void down2_symodd(const uint8_t *const input, int length,
uint8_t *output) {
// Actual filter len = 2 * filter_len_half - 1.
const int16_t *filter = vp9_down2_symodd_half_filter;
const int filter_len_half = sizeof(vp9_down2_symodd_half_filter) / 2;
int i, j;
uint8_t *optr = output;
int l1 = filter_len_half - 1;
int l2 = (length - filter_len_half + 1);
l1 += (l1 & 1);
l2 += (l2 & 1);
if (l1 > l2) {
// Short input length.
for (i = 0; i < length; i += 2) {
int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0];
for (j = 1; j < filter_len_half; ++j) {
sum += (input[(i - j < 0 ? 0 : i - j)] +
input[(i + j >= length ? length - 1 : i + j)]) *
filter[j];
}
sum >>= FILTER_BITS;
*optr++ = clip_pixel(sum);
}
} else {
// Initial part.
for (i = 0; i < l1; i += 2) {
int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0];
for (j = 1; j < filter_len_half; ++j) {
sum += (input[(i - j < 0 ? 0 : i - j)] + input[i + j]) * filter[j];
}
sum >>= FILTER_BITS;
*optr++ = clip_pixel(sum);
}
// Middle part.
for (; i < l2; i += 2) {
int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0];
for (j = 1; j < filter_len_half; ++j) {
sum += (input[i - j] + input[i + j]) * filter[j];
}
sum >>= FILTER_BITS;
*optr++ = clip_pixel(sum);
}
// End part.
for (; i < length; i += 2) {
int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0];
for (j = 1; j < filter_len_half; ++j) {
sum += (input[i - j] + input[(i + j >= length ? length - 1 : i + j)]) *
filter[j];
}
sum >>= FILTER_BITS;
*optr++ = clip_pixel(sum);
}
}
}
static int get_down2_length(int length, int steps) {
int s;
for (s = 0; s < steps; ++s)
length = (length + 1) >> 1;
return length;
}
static int get_down2_steps(int in_length, int out_length) {
int steps = 0;
int proj_in_length;
while ((proj_in_length = get_down2_length(in_length, 1)) >= out_length) {
++steps;
in_length = proj_in_length;
}
return steps;
}
static void resize_multistep(const uint8_t *const input,
int length,
uint8_t *output,
int olength,
uint8_t *buf) {
int steps;
if (length == olength) {
memcpy(output, input, sizeof(uint8_t) * length);
return;
}
steps = get_down2_steps(length, olength);
if (steps > 0) {
int s;
uint8_t *out = NULL;
uint8_t *tmpbuf = NULL;
uint8_t *otmp, *otmp2;
int filteredlength = length;
if (!tmpbuf) {
tmpbuf = (uint8_t *)malloc(sizeof(uint8_t) * length);
otmp = tmpbuf;
} else {
otmp = buf;
}
otmp2 = otmp + get_down2_length(length, 1);
for (s = 0; s < steps; ++s) {
const int proj_filteredlength = get_down2_length(filteredlength, 1);
const uint8_t *const in = (s == 0 ? input : out);
if (s == steps - 1 && proj_filteredlength == olength)
out = output;
else
out = (s & 1 ? otmp2 : otmp);
if (filteredlength & 1)
down2_symodd(in, filteredlength, out);
else
down2_symeven(in, filteredlength, out);
filteredlength = proj_filteredlength;
}
if (filteredlength != olength) {
interpolate(out, filteredlength, output, olength);
}
if (tmpbuf)
free(tmpbuf);
} else {
interpolate(input, length, output, olength);
}
}
static void fill_col_to_arr(uint8_t *img, int stride, int len, uint8_t *arr) {
int i;
uint8_t *iptr = img;
uint8_t *aptr = arr;
for (i = 0; i < len; ++i, iptr += stride) {
*aptr++ = *iptr;
}
}
static void fill_arr_to_col(uint8_t *img, int stride, int len, uint8_t *arr) {
int i;
uint8_t *iptr = img;
uint8_t *aptr = arr;
for (i = 0; i < len; ++i, iptr += stride) {
*iptr = *aptr++;
}
}
void vp9_resize_plane(const uint8_t *const input,
int height,
int width,
int in_stride,
uint8_t *output,
int height2,
int width2,
int out_stride) {
int i;
uint8_t *intbuf = (uint8_t *)malloc(sizeof(uint8_t) * width2 * height);
uint8_t *tmpbuf = (uint8_t *)malloc(sizeof(uint8_t) *
(width < height ? height : width));
uint8_t *arrbuf = (uint8_t *)malloc(sizeof(uint8_t) * (height + height2));
assert(width > 0);
assert(height > 0);
assert(width2 > 0);
assert(height2 > 0);
for (i = 0; i < height; ++i)
resize_multistep(input + in_stride * i, width,
intbuf + width2 * i, width2, tmpbuf);
for (i = 0; i < width2; ++i) {
fill_col_to_arr(intbuf + i, width2, height, arrbuf);
resize_multistep(arrbuf, height, arrbuf + height, height2, tmpbuf);
fill_arr_to_col(output + i, out_stride, height2, arrbuf + height);
}
free(intbuf);
free(tmpbuf);
free(arrbuf);
}
#if CONFIG_VP9_HIGHBITDEPTH
static void highbd_interpolate(const uint16_t *const input, int inlength,
uint16_t *output, int outlength, int bd) {
const int64_t delta =
(((uint64_t)inlength << 32) + outlength / 2) / outlength;
const int64_t offset = inlength > outlength ?
(((int64_t)(inlength - outlength) << 31) + outlength / 2) / outlength :
-(((int64_t)(outlength - inlength) << 31) + outlength / 2) / outlength;
uint16_t *optr = output;
int x, x1, x2, sum, k, int_pel, sub_pel;
int64_t y;
const interp_kernel *interp_filters =
choose_interp_filter(inlength, outlength);
x = 0;
y = offset;
while ((y >> INTERP_PRECISION_BITS) < (INTERP_TAPS / 2 - 1)) {
x++;
y += delta;
}
x1 = x;
x = outlength - 1;
y = delta * x + offset;
while ((y >> INTERP_PRECISION_BITS) +
(int64_t)(INTERP_TAPS / 2) >= inlength) {
x--;
y -= delta;
}
x2 = x;
if (x1 > x2) {
for (x = 0, y = offset; x < outlength; ++x, y += delta) {
const int16_t *filter;
int_pel = y >> INTERP_PRECISION_BITS;
sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK;
filter = interp_filters[sub_pel];
sum = 0;
for (k = 0; k < INTERP_TAPS; ++k) {
const int pk = int_pel - INTERP_TAPS / 2 + 1 + k;
sum += filter[k] *
input[(pk < 0 ? 0 : (pk >= inlength ? inlength - 1 : pk))];
}
*optr++ = clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd);
}
} else {
// Initial part.
for (x = 0, y = offset; x < x1; ++x, y += delta) {
const int16_t *filter;
int_pel = y >> INTERP_PRECISION_BITS;
sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK;
filter = interp_filters[sub_pel];
sum = 0;
for (k = 0; k < INTERP_TAPS; ++k)
sum += filter[k] *
input[(int_pel - INTERP_TAPS / 2 + 1 + k < 0 ?
0 : int_pel - INTERP_TAPS / 2 + 1 + k)];
*optr++ = clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd);
}
// Middle part.
for (; x <= x2; ++x, y += delta) {
const int16_t *filter;
int_pel = y >> INTERP_PRECISION_BITS;
sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK;
filter = interp_filters[sub_pel];
sum = 0;
for (k = 0; k < INTERP_TAPS; ++k)
sum += filter[k] * input[int_pel - INTERP_TAPS / 2 + 1 + k];
*optr++ = clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd);
}
// End part.
for (; x < outlength; ++x, y += delta) {
const int16_t *filter;
int_pel = y >> INTERP_PRECISION_BITS;
sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK;
filter = interp_filters[sub_pel];
sum = 0;
for (k = 0; k < INTERP_TAPS; ++k)
sum += filter[k] * input[(int_pel - INTERP_TAPS / 2 + 1 + k >=
inlength ? inlength - 1 :
int_pel - INTERP_TAPS / 2 + 1 + k)];
*optr++ = clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd);
}
}
}
static void highbd_down2_symeven(const uint16_t *const input, int length,
uint16_t *output, int bd) {
// Actual filter len = 2 * filter_len_half.
static const int16_t *filter = vp9_down2_symeven_half_filter;
const int filter_len_half = sizeof(vp9_down2_symeven_half_filter) / 2;
int i, j;
uint16_t *optr = output;
int l1 = filter_len_half;
int l2 = (length - filter_len_half);
l1 += (l1 & 1);
l2 += (l2 & 1);
if (l1 > l2) {
// Short input length.
for (i = 0; i < length; i += 2) {
int sum = (1 << (FILTER_BITS - 1));
for (j = 0; j < filter_len_half; ++j) {
sum += (input[(i - j < 0 ? 0 : i - j)] +
input[(i + 1 + j >= length ? length - 1 : i + 1 + j)]) *
filter[j];
}
sum >>= FILTER_BITS;
*optr++ = clip_pixel_highbd(sum, bd);
}
} else {
// Initial part.
for (i = 0; i < l1; i += 2) {
int sum = (1 << (FILTER_BITS - 1));
for (j = 0; j < filter_len_half; ++j) {
sum += (input[(i - j < 0 ? 0 : i - j)] + input[i + 1 + j]) * filter[j];
}
sum >>= FILTER_BITS;
*optr++ = clip_pixel_highbd(sum, bd);
}
// Middle part.
for (; i < l2; i += 2) {
int sum = (1 << (FILTER_BITS - 1));
for (j = 0; j < filter_len_half; ++j) {
sum += (input[i - j] + input[i + 1 + j]) * filter[j];
}
sum >>= FILTER_BITS;
*optr++ = clip_pixel_highbd(sum, bd);
}
// End part.
for (; i < length; i += 2) {
int sum = (1 << (FILTER_BITS - 1));
for (j = 0; j < filter_len_half; ++j) {
sum += (input[i - j] +
input[(i + 1 + j >= length ? length - 1 : i + 1 + j)]) *
filter[j];
}
sum >>= FILTER_BITS;
*optr++ = clip_pixel_highbd(sum, bd);
}
}
}
static void highbd_down2_symodd(const uint16_t *const input, int length,
uint16_t *output, int bd) {
// Actual filter len = 2 * filter_len_half - 1.
static const int16_t *filter = vp9_down2_symodd_half_filter;
const int filter_len_half = sizeof(vp9_down2_symodd_half_filter) / 2;
int i, j;
uint16_t *optr = output;
int l1 = filter_len_half - 1;
int l2 = (length - filter_len_half + 1);
l1 += (l1 & 1);
l2 += (l2 & 1);
if (l1 > l2) {
// Short input length.
for (i = 0; i < length; i += 2) {
int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0];
for (j = 1; j < filter_len_half; ++j) {
sum += (input[(i - j < 0 ? 0 : i - j)] +
input[(i + j >= length ? length - 1 : i + j)]) *
filter[j];
}
sum >>= FILTER_BITS;
*optr++ = clip_pixel_highbd(sum, bd);
}
} else {
// Initial part.
for (i = 0; i < l1; i += 2) {
int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0];
for (j = 1; j < filter_len_half; ++j) {
sum += (input[(i - j < 0 ? 0 : i - j)] + input[i + j]) * filter[j];
}
sum >>= FILTER_BITS;
*optr++ = clip_pixel_highbd(sum, bd);
}
// Middle part.
for (; i < l2; i += 2) {
int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0];
for (j = 1; j < filter_len_half; ++j) {
sum += (input[i - j] + input[i + j]) * filter[j];
}
sum >>= FILTER_BITS;
*optr++ = clip_pixel_highbd(sum, bd);
}
// End part.
for (; i < length; i += 2) {
int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0];
for (j = 1; j < filter_len_half; ++j) {
sum += (input[i - j] + input[(i + j >= length ? length - 1 : i + j)]) *
filter[j];
}
sum >>= FILTER_BITS;
*optr++ = clip_pixel_highbd(sum, bd);
}
}
}
static void highbd_resize_multistep(const uint16_t *const input,
int length,
uint16_t *output,
int olength,
uint16_t *buf,
int bd) {
int steps;
if (length == olength) {
memcpy(output, input, sizeof(uint16_t) * length);
return;
}
steps = get_down2_steps(length, olength);
if (steps > 0) {
int s;
uint16_t *out = NULL;
uint16_t *tmpbuf = NULL;
uint16_t *otmp, *otmp2;
int filteredlength = length;
if (!tmpbuf) {
tmpbuf = (uint16_t *)malloc(sizeof(uint16_t) * length);
otmp = tmpbuf;
} else {
otmp = buf;
}
otmp2 = otmp + get_down2_length(length, 1);
for (s = 0; s < steps; ++s) {
const int proj_filteredlength = get_down2_length(filteredlength, 1);
const uint16_t *const in = (s == 0 ? input : out);
if (s == steps - 1 && proj_filteredlength == olength)
out = output;
else
out = (s & 1 ? otmp2 : otmp);
if (filteredlength & 1)
highbd_down2_symodd(in, filteredlength, out, bd);
else
highbd_down2_symeven(in, filteredlength, out, bd);
filteredlength = proj_filteredlength;
}
if (filteredlength != olength) {
highbd_interpolate(out, filteredlength, output, olength, bd);
}
if (tmpbuf)
free(tmpbuf);
} else {
highbd_interpolate(input, length, output, olength, bd);
}
}
static void highbd_fill_col_to_arr(uint16_t *img, int stride, int len,
uint16_t *arr) {
int i;
uint16_t *iptr = img;
uint16_t *aptr = arr;
for (i = 0; i < len; ++i, iptr += stride) {
*aptr++ = *iptr;
}
}
static void highbd_fill_arr_to_col(uint16_t *img, int stride, int len,
uint16_t *arr) {
int i;
uint16_t *iptr = img;
uint16_t *aptr = arr;
for (i = 0; i < len; ++i, iptr += stride) {
*iptr = *aptr++;
}
}
void vp9_highbd_resize_plane(const uint8_t *const input,
int height,
int width,
int in_stride,
uint8_t *output,
int height2,
int width2,
int out_stride,
int bd) {
int i;
uint16_t *intbuf = (uint16_t *)malloc(sizeof(uint16_t) * width2 * height);
uint16_t *tmpbuf = (uint16_t *)malloc(sizeof(uint16_t) *
(width < height ? height : width));
uint16_t *arrbuf = (uint16_t *)malloc(sizeof(uint16_t) * (height + height2));
for (i = 0; i < height; ++i) {
highbd_resize_multistep(CONVERT_TO_SHORTPTR(input + in_stride * i), width,
intbuf + width2 * i, width2, tmpbuf, bd);
}
for (i = 0; i < width2; ++i) {
highbd_fill_col_to_arr(intbuf + i, width2, height, arrbuf);
highbd_resize_multistep(arrbuf, height, arrbuf + height, height2, tmpbuf,
bd);
highbd_fill_arr_to_col(CONVERT_TO_SHORTPTR(output + i), out_stride, height2,
arrbuf + height);
}
free(intbuf);
free(tmpbuf);
free(arrbuf);
}
#endif // CONFIG_VP9_HIGHBITDEPTH
void vp9_resize_frame420(const uint8_t *const y,
int y_stride,
const uint8_t *const u, const uint8_t *const v,
int uv_stride,
int height, int width,
uint8_t *oy, int oy_stride,
uint8_t *ou, uint8_t *ov, int ouv_stride,
int oheight, int owidth) {
vp9_resize_plane(y, height, width, y_stride,
oy, oheight, owidth, oy_stride);
vp9_resize_plane(u, height / 2, width / 2, uv_stride,
ou, oheight / 2, owidth / 2, ouv_stride);
vp9_resize_plane(v, height / 2, width / 2, uv_stride,
ov, oheight / 2, owidth / 2, ouv_stride);
}
void vp9_resize_frame422(const uint8_t *const y, int y_stride,
const uint8_t *const u, const uint8_t *const v,
int uv_stride,
int height, int width,
uint8_t *oy, int oy_stride,
uint8_t *ou, uint8_t *ov, int ouv_stride,
int oheight, int owidth) {
vp9_resize_plane(y, height, width, y_stride,
oy, oheight, owidth, oy_stride);
vp9_resize_plane(u, height, width / 2, uv_stride,
ou, oheight, owidth / 2, ouv_stride);
vp9_resize_plane(v, height, width / 2, uv_stride,
ov, oheight, owidth / 2, ouv_stride);
}
void vp9_resize_frame444(const uint8_t *const y, int y_stride,
const uint8_t *const u, const uint8_t *const v,
int uv_stride,
int height, int width,
uint8_t *oy, int oy_stride,
uint8_t *ou, uint8_t *ov, int ouv_stride,
int oheight, int owidth) {
vp9_resize_plane(y, height, width, y_stride,
oy, oheight, owidth, oy_stride);
vp9_resize_plane(u, height, width, uv_stride,
ou, oheight, owidth, ouv_stride);
vp9_resize_plane(v, height, width, uv_stride,
ov, oheight, owidth, ouv_stride);
}
#if CONFIG_VP9_HIGHBITDEPTH
void vp9_highbd_resize_frame420(const uint8_t *const y,
int y_stride,
const uint8_t *const u, const uint8_t *const v,
int uv_stride,
int height, int width,
uint8_t *oy, int oy_stride,
uint8_t *ou, uint8_t *ov, int ouv_stride,
int oheight, int owidth, int bd) {
vp9_highbd_resize_plane(y, height, width, y_stride,
oy, oheight, owidth, oy_stride, bd);
vp9_highbd_resize_plane(u, height / 2, width / 2, uv_stride,
ou, oheight / 2, owidth / 2, ouv_stride, bd);
vp9_highbd_resize_plane(v, height / 2, width / 2, uv_stride,
ov, oheight / 2, owidth / 2, ouv_stride, bd);
}
void vp9_highbd_resize_frame422(const uint8_t *const y, int y_stride,
const uint8_t *const u, const uint8_t *const v,
int uv_stride,
int height, int width,
uint8_t *oy, int oy_stride,
uint8_t *ou, uint8_t *ov, int ouv_stride,
int oheight, int owidth, int bd) {
vp9_highbd_resize_plane(y, height, width, y_stride,
oy, oheight, owidth, oy_stride, bd);
vp9_highbd_resize_plane(u, height, width / 2, uv_stride,
ou, oheight, owidth / 2, ouv_stride, bd);
vp9_highbd_resize_plane(v, height, width / 2, uv_stride,
ov, oheight, owidth / 2, ouv_stride, bd);
}
void vp9_highbd_resize_frame444(const uint8_t *const y, int y_stride,
const uint8_t *const u, const uint8_t *const v,
int uv_stride,
int height, int width,
uint8_t *oy, int oy_stride,
uint8_t *ou, uint8_t *ov, int ouv_stride,
int oheight, int owidth, int bd) {
vp9_highbd_resize_plane(y, height, width, y_stride,
oy, oheight, owidth, oy_stride, bd);
vp9_highbd_resize_plane(u, height, width, uv_stride,
ou, oheight, owidth, ouv_stride, bd);
vp9_highbd_resize_plane(v, height, width, uv_stride,
ov, oheight, owidth, ouv_stride, bd);
}
#endif // CONFIG_VP9_HIGHBITDEPTH
Reference in New Issue View Git Blame Copy Permalink