Commit fa904a09 authored by Imdad Sardharwalla's avatar Imdad Sardharwalla

Fix and clean up warp filter SIMD code

- Fixed SSE4.1 implementation of the highbd warp filter.
- Removed the SSE2 and SSSE3 implementations of both the lowbd and highbd
  versions of the warp filter, as these will not work with CONFIG_JNT_COMP=1.
  (There are now only SSE4.1 implementations)
- The warp filter tests have been correspondingly updated.

Change-Id: I2bc1ebb69f2ed876803902908586c3848c03c11e
parent aec60dd8
......@@ -427,29 +427,13 @@ set(AOM_AV1_COMMON_SOURCES
"${AOM_ROOT}/av1/common/warped_motion.c"
"${AOM_ROOT}/av1/common/warped_motion.h")
set(AOM_AV1_COMMON_INTRIN_SSE2
${AOM_AV1_COMMON_INTRIN_SSE2}
"${AOM_ROOT}/av1/common/x86/warp_plane_sse2.c")
set(AOM_AV1_COMMON_INTRIN_SSSE3
${AOM_AV1_COMMON_INTRIN_SSSE3}
"${AOM_ROOT}/av1/common/x86/warp_plane_ssse3.c")
set(AOM_AV1_COMMON_INTRIN_SSE4_1
${AOM_AV1_COMMON_INTRIN_SSE4_1}
"${AOM_ROOT}/av1/common/x86/warp_plane_sse4.c")
if (CONFIG_JNT_COMP)
set(AOM_AV1_COMMON_INTRIN_SSE4_1
${AOM_AV1_COMMON_INTRIN_SSE4_1}
"${AOM_ROOT}/av1/common/x86/warp_plane_sse4.c")
endif ()
set(AOM_AV1_COMMON_INTRIN_SSSE3
${AOM_AV1_COMMON_INTRIN_SSSE3}
"${AOM_ROOT}/av1/common/x86/highbd_warp_plane_ssse3.c")
if (CONFIG_JNT_COMP)
set(AOM_AV1_COMMON_INTRIN_SSE4_1
${AOM_AV1_COMMON_INTRIN_SSE4_1}
"${AOM_ROOT}/av1/common/x86/highbd_warp_plane_sse4.c")
endif ()
"${AOM_ROOT}/av1/common/x86/highbd_warp_plane_sse4.c")
if (CONFIG_HASH_ME)
set(AOM_AV1_ENCODER_SOURCES
......
......@@ -450,22 +450,10 @@ if ($opts{config} !~ /libs-x86-win32-vs.*/) {
# WARPED_MOTION / GLOBAL_MOTION functions
add_proto qw/void av1_warp_affine/, "const int32_t *mat, const uint8_t *ref, int width, int height, int stride, uint8_t *pred, int p_col, int p_row, int p_width, int p_height, int p_stride, int subsampling_x, int subsampling_y, ConvolveParams *conv_params, int16_t alpha, int16_t beta, int16_t gamma, int16_t delta";
if (aom_config("CONFIG_JNT_COMP") eq "yes") {
specialize qw/av1_warp_affine sse4_1/;
} else {
specialize qw/av1_warp_affine sse2 ssse3/;
}
specialize qw/av1_warp_affine sse4_1/;
add_proto qw/void av1_highbd_warp_affine/, "const int32_t *mat, const uint16_t *ref, int width, int height, int stride, uint16_t *pred, int p_col, int p_row, int p_width, int p_height, int p_stride, int subsampling_x, int subsampling_y, int bd, ConvolveParams *conv_params, int16_t alpha, int16_t beta, int16_t gamma, int16_t delta";
if (aom_config("CONFIG_JNT_COMP") eq "yes") {
specialize qw/av1_highbd_warp_affine sse4_1/;
} else {
specialize qw/av1_highbd_warp_affine ssse3/;
}
if (aom_config("CONFIG_AV1_ENCODER") eq "yes") {
add_proto qw/double compute_cross_correlation/, "unsigned char *im1, int stride1, int x1, int y1, unsigned char *im2, int stride2, int x2, int y2";
......
......@@ -39,6 +39,8 @@ void av1_highbd_warp_affine_sse4_1(const int32_t *mat, const uint16_t *ref,
conv_params->do_post_rounding = 1;
}
assert(FILTER_BITS == FILTER_BITS);
assert(!(bd == 12 && reduce_bits_horiz < 5));
#if CONFIG_JNT_COMP
const int w0 = conv_params->fwd_offset;
const int w1 = conv_params->bck_offset;
......
/*
* Copyright (c) 2016, 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 <tmmintrin.h>
#include "./av1_rtcd.h"
#include "av1/common/warped_motion.h"
void av1_highbd_warp_affine_ssse3(const int32_t *mat, const uint16_t *ref,
int width, int height, int stride,
uint16_t *pred, int p_col, int p_row,
int p_width, int p_height, int p_stride,
int subsampling_x, int subsampling_y, int bd,
ConvolveParams *conv_params, int16_t alpha,
int16_t beta, int16_t gamma, int16_t delta) {
int comp_avg = conv_params->do_average;
__m128i tmp[15];
int i, j, k;
const int use_conv_params =
(conv_params->round == CONVOLVE_OPT_NO_ROUND && conv_params->dst);
int reduce_bits_horiz =
use_conv_params ? conv_params->round_0 : HORSHEAR_REDUCE_PREC_BITS;
if (!use_conv_params && bd + FILTER_BITS + 2 - reduce_bits_horiz > 16)
reduce_bits_horiz += bd + FILTER_BITS - reduce_bits_horiz - 14;
const int reduce_bits_vert = use_conv_params
? conv_params->round_1
: 2 * FILTER_BITS - reduce_bits_horiz;
const int offset_bits_horiz =
use_conv_params ? bd + FILTER_BITS - 1 : bd + FILTER_BITS - 1;
if (use_conv_params) {
conv_params->do_post_rounding = 1;
}
assert(FILTER_BITS == FILTER_BITS);
if (bd == 12 && reduce_bits_horiz < 5) printf("Error\n");
/* Note: For this code to work, the left/right frame borders need to be
extended by at least 13 pixels each. By the time we get here, other
code will have set up this border, but we allow an explicit check
for debugging purposes.
*/
/*for (i = 0; i < height; ++i) {
for (j = 0; j < 13; ++j) {
assert(ref[i * stride - 13 + j] == ref[i * stride]);
assert(ref[i * stride + width + j] == ref[i * stride + (width - 1)]);
}
}*/
for (i = 0; i < p_height; i += 8) {
for (j = 0; j < p_width; j += 8) {
const int32_t src_x = (p_col + j + 4) << subsampling_x;
const int32_t src_y = (p_row + i + 4) << subsampling_y;
const int32_t dst_x = mat[2] * src_x + mat[3] * src_y + mat[0];
const int32_t dst_y = mat[4] * src_x + mat[5] * src_y + mat[1];
const int32_t x4 = dst_x >> subsampling_x;
const int32_t y4 = dst_y >> subsampling_y;
int32_t ix4 = x4 >> WARPEDMODEL_PREC_BITS;
int32_t sx4 = x4 & ((1 << WARPEDMODEL_PREC_BITS) - 1);
int32_t iy4 = y4 >> WARPEDMODEL_PREC_BITS;
int32_t sy4 = y4 & ((1 << WARPEDMODEL_PREC_BITS) - 1);
// Add in all the constant terms, including rounding and offset
sx4 += alpha * (-4) + beta * (-4) + (1 << (WARPEDDIFF_PREC_BITS - 1)) +
(WARPEDPIXEL_PREC_SHIFTS << WARPEDDIFF_PREC_BITS);
sy4 += gamma * (-4) + delta * (-4) + (1 << (WARPEDDIFF_PREC_BITS - 1)) +
(WARPEDPIXEL_PREC_SHIFTS << WARPEDDIFF_PREC_BITS);
sx4 &= ~((1 << WARP_PARAM_REDUCE_BITS) - 1);
sy4 &= ~((1 << WARP_PARAM_REDUCE_BITS) - 1);
// Horizontal filter
// If the block is aligned such that, after clamping, every sample
// would be taken from the leftmost/rightmost column, then we can
// skip the expensive horizontal filter.
if (ix4 <= -7) {
for (k = -7; k < AOMMIN(8, p_height - i); ++k) {
int iy = iy4 + k;
if (iy < 0)
iy = 0;
else if (iy > height - 1)
iy = height - 1;
tmp[k + 7] = _mm_set1_epi16(
(1 << (bd + FILTER_BITS - reduce_bits_horiz - 1)) +
ref[iy * stride] * (1 << (FILTER_BITS - reduce_bits_horiz)));
}
} else if (ix4 >= width + 6) {
for (k = -7; k < AOMMIN(8, p_height - i); ++k) {
int iy = iy4 + k;
if (iy < 0)
iy = 0;
else if (iy > height - 1)
iy = height - 1;
tmp[k + 7] =
_mm_set1_epi16((1 << (bd + FILTER_BITS - reduce_bits_horiz - 1)) +
ref[iy * stride + (width - 1)] *
(1 << (FILTER_BITS - reduce_bits_horiz)));
}
} else {
for (k = -7; k < AOMMIN(8, p_height - i); ++k) {
int iy = iy4 + k;
if (iy < 0)
iy = 0;
else if (iy > height - 1)
iy = height - 1;
int sx = sx4 + beta * (k + 4);
// Load source pixels
const __m128i src =
_mm_loadu_si128((__m128i *)(ref + iy * stride + ix4 - 7));
const __m128i src2 =
_mm_loadu_si128((__m128i *)(ref + iy * stride + ix4 + 1));
// Filter even-index pixels
const __m128i tmp_0 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sx + 0 * alpha) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_2 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sx + 2 * alpha) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_4 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sx + 4 * alpha) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_6 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sx + 6 * alpha) >> WARPEDDIFF_PREC_BITS)));
// coeffs 0 1 0 1 2 3 2 3 for pixels 0, 2
const __m128i tmp_8 = _mm_unpacklo_epi32(tmp_0, tmp_2);
// coeffs 0 1 0 1 2 3 2 3 for pixels 4, 6
const __m128i tmp_10 = _mm_unpacklo_epi32(tmp_4, tmp_6);
// coeffs 4 5 4 5 6 7 6 7 for pixels 0, 2
const __m128i tmp_12 = _mm_unpackhi_epi32(tmp_0, tmp_2);
// coeffs 4 5 4 5 6 7 6 7 for pixels 4, 6
const __m128i tmp_14 = _mm_unpackhi_epi32(tmp_4, tmp_6);
// coeffs 0 1 0 1 0 1 0 1 for pixels 0, 2, 4, 6
const __m128i coeff_0 = _mm_unpacklo_epi64(tmp_8, tmp_10);
// coeffs 2 3 2 3 2 3 2 3 for pixels 0, 2, 4, 6
const __m128i coeff_2 = _mm_unpackhi_epi64(tmp_8, tmp_10);
// coeffs 4 5 4 5 4 5 4 5 for pixels 0, 2, 4, 6
const __m128i coeff_4 = _mm_unpacklo_epi64(tmp_12, tmp_14);
// coeffs 6 7 6 7 6 7 6 7 for pixels 0, 2, 4, 6
const __m128i coeff_6 = _mm_unpackhi_epi64(tmp_12, tmp_14);
const __m128i round_const = _mm_set1_epi32(
(1 << offset_bits_horiz) + ((1 << reduce_bits_horiz) >> 1));
// Calculate filtered results
const __m128i res_0 = _mm_madd_epi16(src, coeff_0);
const __m128i res_2 =
_mm_madd_epi16(_mm_alignr_epi8(src2, src, 4), coeff_2);
const __m128i res_4 =
_mm_madd_epi16(_mm_alignr_epi8(src2, src, 8), coeff_4);
const __m128i res_6 =
_mm_madd_epi16(_mm_alignr_epi8(src2, src, 12), coeff_6);
__m128i res_even = _mm_add_epi32(_mm_add_epi32(res_0, res_4),
_mm_add_epi32(res_2, res_6));
res_even = _mm_sra_epi32(_mm_add_epi32(res_even, round_const),
_mm_cvtsi32_si128(reduce_bits_horiz));
// Filter odd-index pixels
const __m128i tmp_1 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sx + 1 * alpha) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_3 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sx + 3 * alpha) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_5 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sx + 5 * alpha) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_7 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sx + 7 * alpha) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_9 = _mm_unpacklo_epi32(tmp_1, tmp_3);
const __m128i tmp_11 = _mm_unpacklo_epi32(tmp_5, tmp_7);
const __m128i tmp_13 = _mm_unpackhi_epi32(tmp_1, tmp_3);
const __m128i tmp_15 = _mm_unpackhi_epi32(tmp_5, tmp_7);
const __m128i coeff_1 = _mm_unpacklo_epi64(tmp_9, tmp_11);
const __m128i coeff_3 = _mm_unpackhi_epi64(tmp_9, tmp_11);
const __m128i coeff_5 = _mm_unpacklo_epi64(tmp_13, tmp_15);
const __m128i coeff_7 = _mm_unpackhi_epi64(tmp_13, tmp_15);
const __m128i res_1 =
_mm_madd_epi16(_mm_alignr_epi8(src2, src, 2), coeff_1);
const __m128i res_3 =
_mm_madd_epi16(_mm_alignr_epi8(src2, src, 6), coeff_3);
const __m128i res_5 =
_mm_madd_epi16(_mm_alignr_epi8(src2, src, 10), coeff_5);
const __m128i res_7 =
_mm_madd_epi16(_mm_alignr_epi8(src2, src, 14), coeff_7);
__m128i res_odd = _mm_add_epi32(_mm_add_epi32(res_1, res_5),
_mm_add_epi32(res_3, res_7));
res_odd = _mm_sra_epi32(_mm_add_epi32(res_odd, round_const),
_mm_cvtsi32_si128(reduce_bits_horiz));
// Combine results into one register.
// We store the columns in the order 0, 2, 4, 6, 1, 3, 5, 7
// as this order helps with the vertical filter.
tmp[k + 7] = _mm_packs_epi32(res_even, res_odd);
}
}
// Vertical filter
for (k = -4; k < AOMMIN(4, p_height - i - 4); ++k) {
int sy = sy4 + delta * (k + 4);
// Load from tmp and rearrange pairs of consecutive rows into the
// column order 0 0 2 2 4 4 6 6; 1 1 3 3 5 5 7 7
const __m128i *src = tmp + (k + 4);
const __m128i src_0 = _mm_unpacklo_epi16(src[0], src[1]);
const __m128i src_2 = _mm_unpacklo_epi16(src[2], src[3]);
const __m128i src_4 = _mm_unpacklo_epi16(src[4], src[5]);
const __m128i src_6 = _mm_unpacklo_epi16(src[6], src[7]);
// Filter even-index pixels
const __m128i tmp_0 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sy + 0 * gamma) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_2 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sy + 2 * gamma) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_4 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sy + 4 * gamma) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_6 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sy + 6 * gamma) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_8 = _mm_unpacklo_epi32(tmp_0, tmp_2);
const __m128i tmp_10 = _mm_unpacklo_epi32(tmp_4, tmp_6);
const __m128i tmp_12 = _mm_unpackhi_epi32(tmp_0, tmp_2);
const __m128i tmp_14 = _mm_unpackhi_epi32(tmp_4, tmp_6);
const __m128i coeff_0 = _mm_unpacklo_epi64(tmp_8, tmp_10);
const __m128i coeff_2 = _mm_unpackhi_epi64(tmp_8, tmp_10);
const __m128i coeff_4 = _mm_unpacklo_epi64(tmp_12, tmp_14);
const __m128i coeff_6 = _mm_unpackhi_epi64(tmp_12, tmp_14);
const __m128i res_0 = _mm_madd_epi16(src_0, coeff_0);
const __m128i res_2 = _mm_madd_epi16(src_2, coeff_2);
const __m128i res_4 = _mm_madd_epi16(src_4, coeff_4);
const __m128i res_6 = _mm_madd_epi16(src_6, coeff_6);
const __m128i res_even = _mm_add_epi32(_mm_add_epi32(res_0, res_2),
_mm_add_epi32(res_4, res_6));
// Filter odd-index pixels
const __m128i src_1 = _mm_unpackhi_epi16(src[0], src[1]);
const __m128i src_3 = _mm_unpackhi_epi16(src[2], src[3]);
const __m128i src_5 = _mm_unpackhi_epi16(src[4], src[5]);
const __m128i src_7 = _mm_unpackhi_epi16(src[6], src[7]);
const __m128i tmp_1 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sy + 1 * gamma) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_3 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sy + 3 * gamma) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_5 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sy + 5 * gamma) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_7 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sy + 7 * gamma) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_9 = _mm_unpacklo_epi32(tmp_1, tmp_3);
const __m128i tmp_11 = _mm_unpacklo_epi32(tmp_5, tmp_7);
const __m128i tmp_13 = _mm_unpackhi_epi32(tmp_1, tmp_3);
const __m128i tmp_15 = _mm_unpackhi_epi32(tmp_5, tmp_7);
const __m128i coeff_1 = _mm_unpacklo_epi64(tmp_9, tmp_11);
const __m128i coeff_3 = _mm_unpackhi_epi64(tmp_9, tmp_11);
const __m128i coeff_5 = _mm_unpacklo_epi64(tmp_13, tmp_15);
const __m128i coeff_7 = _mm_unpackhi_epi64(tmp_13, tmp_15);
const __m128i res_1 = _mm_madd_epi16(src_1, coeff_1);
const __m128i res_3 = _mm_madd_epi16(src_3, coeff_3);
const __m128i res_5 = _mm_madd_epi16(src_5, coeff_5);
const __m128i res_7 = _mm_madd_epi16(src_7, coeff_7);
const __m128i res_odd = _mm_add_epi32(_mm_add_epi32(res_1, res_3),
_mm_add_epi32(res_5, res_7));
// Rearrange pixels back into the order 0 ... 7
__m128i res_lo = _mm_unpacklo_epi32(res_even, res_odd);
__m128i res_hi = _mm_unpackhi_epi32(res_even, res_odd);
if (use_conv_params) {
__m128i *const p =
(__m128i *)&conv_params
->dst[(i + k + 4) * conv_params->dst_stride + j];
const __m128i round_const = _mm_set1_epi32(
-(1 << (bd + 2 * FILTER_BITS - conv_params->round_0 - 1)) +
((1 << (conv_params->round_1)) >> 1));
res_lo = _mm_add_epi32(res_lo, round_const);
res_lo =
_mm_sra_epi32(res_lo, _mm_cvtsi32_si128(conv_params->round_1));
if (comp_avg) res_lo = _mm_add_epi32(_mm_loadu_si128(p), res_lo);
_mm_storeu_si128(p, res_lo);
if (p_width > 4) {
res_hi = _mm_add_epi32(res_hi, round_const);
res_hi =
_mm_sra_epi32(res_hi, _mm_cvtsi32_si128(conv_params->round_1));
if (comp_avg)
res_hi = _mm_add_epi32(_mm_loadu_si128(p + 1), res_hi);
_mm_storeu_si128(p + 1, res_hi);
}
} else {
// Round and pack into 8 bits
const __m128i round_const =
_mm_set1_epi32(-(1 << (bd + reduce_bits_vert - 1)) +
((1 << reduce_bits_vert) >> 1));
const __m128i res_lo_round = _mm_srai_epi32(
_mm_add_epi32(res_lo, round_const), reduce_bits_vert);
const __m128i res_hi_round = _mm_srai_epi32(
_mm_add_epi32(res_hi, round_const), reduce_bits_vert);
__m128i res_16bit = _mm_packs_epi32(res_lo_round, res_hi_round);
// Clamp res_16bit to the range [0, 2^bd - 1]
const __m128i max_val = _mm_set1_epi16((1 << bd) - 1);
const __m128i zero = _mm_setzero_si128();
res_16bit = _mm_max_epi16(_mm_min_epi16(res_16bit, max_val), zero);
// Store, blending with 'pred' if needed
__m128i *const p = (__m128i *)&pred[(i + k + 4) * p_stride + j];
// Note: If we're outputting a 4x4 block, we need to be very careful
// to only output 4 pixels at this point, to avoid encode/decode
// mismatches when encoding with multiple threads.
if (p_width == 4) {
if (comp_avg)
res_16bit = _mm_avg_epu16(res_16bit, _mm_loadl_epi64(p));
_mm_storel_epi64(p, res_16bit);
} else {
if (comp_avg)
res_16bit = _mm_avg_epu16(res_16bit, _mm_loadu_si128(p));
_mm_storeu_si128(p, res_16bit);
}
}
}
}
}
}
/*
* Copyright (c) 2017, 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 <emmintrin.h>
#include "./av1_rtcd.h"
#include "av1/common/warped_motion.h"
void av1_warp_affine_sse2(const int32_t *mat, const uint8_t *ref, int width,
int height, int stride, uint8_t *pred, int p_col,
int p_row, int p_width, int p_height, int p_stride,
int subsampling_x, int subsampling_y,
ConvolveParams *conv_params, int16_t alpha,
int16_t beta, int16_t gamma, int16_t delta) {
int comp_avg = conv_params->do_average;
__m128i tmp[15];
int i, j, k;
const int bd = 8;
const int use_conv_params =
(conv_params->round == CONVOLVE_OPT_NO_ROUND && conv_params->dst);
const int reduce_bits_horiz =
use_conv_params ? conv_params->round_0 : HORSHEAR_REDUCE_PREC_BITS;
const int reduce_bits_vert = use_conv_params
? conv_params->round_1
: 2 * FILTER_BITS - reduce_bits_horiz;
const int offset_bits_horiz =
use_conv_params ? bd + FILTER_BITS - 1 : bd + FILTER_BITS - 1;
if (use_conv_params) {
conv_params->do_post_rounding = 1;
}
assert(FILTER_BITS == FILTER_BITS);
/* Note: For this code to work, the left/right frame borders need to be
extended by at least 13 pixels each. By the time we get here, other
code will have set up this border, but we allow an explicit check
for debugging purposes.
*/
/*for (i = 0; i < height; ++i) {
for (j = 0; j < 13; ++j) {
assert(ref[i * stride - 13 + j] == ref[i * stride]);
assert(ref[i * stride + width + j] == ref[i * stride + (width - 1)]);
}
}*/
for (i = 0; i < p_height; i += 8) {
for (j = 0; j < p_width; j += 8) {
const int32_t src_x = (p_col + j + 4) << subsampling_x;
const int32_t src_y = (p_row + i + 4) << subsampling_y;
const int32_t dst_x = mat[2] * src_x + mat[3] * src_y + mat[0];
const int32_t dst_y = mat[4] * src_x + mat[5] * src_y + mat[1];
const int32_t x4 = dst_x >> subsampling_x;
const int32_t y4 = dst_y >> subsampling_y;
int32_t ix4 = x4 >> WARPEDMODEL_PREC_BITS;
int32_t sx4 = x4 & ((1 << WARPEDMODEL_PREC_BITS) - 1);
int32_t iy4 = y4 >> WARPEDMODEL_PREC_BITS;
int32_t sy4 = y4 & ((1 << WARPEDMODEL_PREC_BITS) - 1);
// Add in all the constant terms, including rounding and offset
sx4 += alpha * (-4) + beta * (-4) + (1 << (WARPEDDIFF_PREC_BITS - 1)) +
(WARPEDPIXEL_PREC_SHIFTS << WARPEDDIFF_PREC_BITS);
sy4 += gamma * (-4) + delta * (-4) + (1 << (WARPEDDIFF_PREC_BITS - 1)) +
(WARPEDPIXEL_PREC_SHIFTS << WARPEDDIFF_PREC_BITS);
sx4 &= ~((1 << WARP_PARAM_REDUCE_BITS) - 1);
sy4 &= ~((1 << WARP_PARAM_REDUCE_BITS) - 1);
// Horizontal filter
// If the block is aligned such that, after clamping, every sample
// would be taken from the leftmost/rightmost column, then we can
// skip the expensive horizontal filter.
if (ix4 <= -7) {
for (k = -7; k < AOMMIN(8, p_height - i); ++k) {
int iy = iy4 + k;
if (iy < 0)
iy = 0;
else if (iy > height - 1)
iy = height - 1;
tmp[k + 7] = _mm_set1_epi16(
(1 << (bd + FILTER_BITS - reduce_bits_horiz - 1)) +
ref[iy * stride] * (1 << (FILTER_BITS - reduce_bits_horiz)));
}
} else if (ix4 >= width + 6) {
for (k = -7; k < AOMMIN(8, p_height - i); ++k) {
int iy = iy4 + k;
if (iy < 0)
iy = 0;
else if (iy > height - 1)
iy = height - 1;
tmp[k + 7] =
_mm_set1_epi16((1 << (bd + FILTER_BITS - reduce_bits_horiz - 1)) +
ref[iy * stride + (width - 1)] *
(1 << (FILTER_BITS - reduce_bits_horiz)));
}
} else {
for (k = -7; k < AOMMIN(8, p_height - i); ++k) {
int iy = iy4 + k;
if (iy < 0)
iy = 0;
else if (iy > height - 1)
iy = height - 1;
int sx = sx4 + beta * (k + 4);
// Load source pixels
const __m128i zero = _mm_setzero_si128();
const __m128i src =
_mm_loadu_si128((__m128i *)(ref + iy * stride + ix4 - 7));
// Filter even-index pixels
const __m128i tmp_0 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sx + 0 * alpha) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_2 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sx + 2 * alpha) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_4 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sx + 4 * alpha) >> WARPEDDIFF_PREC_BITS)));
const __m128i tmp_6 = _mm_loadu_si128(
(__m128i *)(warped_filter +
((sx + 6 * alpha) >> WARPEDDIFF_PREC_BITS)));
// coeffs 0 1 0 1 2 3 2 3 for pixels 0, 2
const __m128i tmp_8 = _mm_unpacklo_epi32(tmp_0, tmp_2);
// coeffs 0 1 0 1 2 3 2 3 for pixels 4, 6
const __m128i tmp_10 = _mm_unpacklo_epi32(tmp_4, tmp_6);
// coeffs 4 5 4 5 6 7 6 7 for pixels 0, 2
const __m128i tmp_12 = _mm_unpackhi_epi32(tmp_0, tmp_2);
// coeffs 4 5 4 5 6 7 6 7 for pixels 4, 6
const __m128i tmp_14 = _mm_unpackhi_epi32(tmp_4, tmp_6);
// coeffs 0 1 0 1 0 1 0 1 for pixels 0, 2, 4, 6
const __m128i coeff_0 = _mm_unpacklo_epi64(tmp_8, tmp_10);
// coeffs 2 3 2 3 2 3 2 3 for pixels 0, 2, 4, 6
const __m128i coeff_2 = _mm_unpackhi_epi64(tmp_8, tmp_10);
// coeffs 4 5 4 5 4 5 4 5 for pixels 0, 2, 4, 6
const __m128i coeff_4 = _mm_unpacklo_epi64(tmp_12, tmp_14);
// coeffs 6 7 6 7 6 7 6 7 for pixels 0, 2, 4, 6
const __m128i coeff_6 = _mm_unpackhi_epi64(tmp_12, tmp_14);
const __m128i round_const = _mm_set1_epi32(
(1 << offset_bits_horiz) + ((1 << reduce_bits_horiz) >> 1));
// Calculate filtered results
const __m128i src_0 = _mm_unpacklo_epi8(src, zero);
const __m128i res_0 = _mm_madd_epi16(src_0, coeff_0);
const __m128i src_2 = _mm_unpacklo_epi8(_mm_srli_si128(src, 2), zero);
const __m128i res_2 = _mm_madd_epi16(src_2, coeff_2);
const __m128i src_4 = _mm_unpacklo_epi8(_mm_srli_si128(src, 4), zero);
const __m128i res_4 = _mm_madd_epi16(src_4, coeff_4);
const __m128i src_6 = _mm_unpacklo_epi8(_mm_srli_si128(src, 6), zero);