Browse Source

Added missing libwebp NEON files

pull/24/head
Dmitry Grigoryev 3 years ago committed by Roy Tam
parent
commit
9d42392ea8
  1. 191
      media/libwebp/dsp/alpha_processing_neon.c
  2. 329
      media/libwebp/dsp/filters_neon.c
  3. 6
      media/libwebp/dsp/moz.build
  4. 288
      media/libwebp/dsp/yuv_neon.c

191
media/libwebp/dsp/alpha_processing_neon.c

@ -0,0 +1,191 @@
// Copyright 2017 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING 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.
// -----------------------------------------------------------------------------
//
// Utilities for processing transparent channel, NEON version.
//
// Author: Skal (pascal.massimino@gmail.com)
#include "../dsp/dsp.h"
#if defined(WEBP_USE_NEON)
#include "../dsp/neon.h"
//------------------------------------------------------------------------------
#define MULTIPLIER(a) ((a) * 0x8081)
#define PREMULTIPLY(x, m) (((x) * (m)) >> 23)
#define MULTIPLY_BY_ALPHA(V, ALPHA, OTHER) do { \
const uint8x8_t alpha = (V).val[(ALPHA)]; \
const uint16x8_t r1 = vmull_u8((V).val[1], alpha); \
const uint16x8_t g1 = vmull_u8((V).val[2], alpha); \
const uint16x8_t b1 = vmull_u8((V).val[(OTHER)], alpha); \
/* we use: v / 255 = (v + 1 + (v >> 8)) >> 8 */ \
const uint16x8_t r2 = vsraq_n_u16(r1, r1, 8); \
const uint16x8_t g2 = vsraq_n_u16(g1, g1, 8); \
const uint16x8_t b2 = vsraq_n_u16(b1, b1, 8); \
const uint16x8_t r3 = vaddq_u16(r2, kOne); \
const uint16x8_t g3 = vaddq_u16(g2, kOne); \
const uint16x8_t b3 = vaddq_u16(b2, kOne); \
(V).val[1] = vshrn_n_u16(r3, 8); \
(V).val[2] = vshrn_n_u16(g3, 8); \
(V).val[(OTHER)] = vshrn_n_u16(b3, 8); \
} while (0)
static void ApplyAlphaMultiply_NEON(uint8_t* rgba, int alpha_first,
int w, int h, int stride) {
const uint16x8_t kOne = vdupq_n_u16(1u);
while (h-- > 0) {
uint32_t* const rgbx = (uint32_t*)rgba;
int i = 0;
if (alpha_first) {
for (; i + 8 <= w; i += 8) {
// load aaaa...|rrrr...|gggg...|bbbb...
uint8x8x4_t RGBX = vld4_u8((const uint8_t*)(rgbx + i));
MULTIPLY_BY_ALPHA(RGBX, 0, 3);
vst4_u8((uint8_t*)(rgbx + i), RGBX);
}
} else {
for (; i + 8 <= w; i += 8) {
uint8x8x4_t RGBX = vld4_u8((const uint8_t*)(rgbx + i));
MULTIPLY_BY_ALPHA(RGBX, 3, 0);
vst4_u8((uint8_t*)(rgbx + i), RGBX);
}
}
// Finish with left-overs.
for (; i < w; ++i) {
uint8_t* const rgb = rgba + (alpha_first ? 1 : 0);
const uint8_t* const alpha = rgba + (alpha_first ? 0 : 3);
const uint32_t a = alpha[4 * i];
if (a != 0xff) {
const uint32_t mult = MULTIPLIER(a);
rgb[4 * i + 0] = PREMULTIPLY(rgb[4 * i + 0], mult);
rgb[4 * i + 1] = PREMULTIPLY(rgb[4 * i + 1], mult);
rgb[4 * i + 2] = PREMULTIPLY(rgb[4 * i + 2], mult);
}
}
rgba += stride;
}
}
#undef MULTIPLY_BY_ALPHA
#undef MULTIPLIER
#undef PREMULTIPLY
//------------------------------------------------------------------------------
static int DispatchAlpha_NEON(const uint8_t* alpha, int alpha_stride,
int width, int height,
uint8_t* dst, int dst_stride) {
uint32_t alpha_mask = 0xffffffffu;
uint8x8_t mask8 = vdup_n_u8(0xff);
uint32_t tmp[2];
int i, j;
for (j = 0; j < height; ++j) {
// We don't know if alpha is first or last in dst[] (depending on rgbA/Argb
// mode). So we must be sure dst[4*i + 8 - 1] is writable for the store.
// Hence the test with 'width - 1' instead of just 'width'.
for (i = 0; i + 8 <= width - 1; i += 8) {
uint8x8x4_t rgbX = vld4_u8((const uint8_t*)(dst + 4 * i));
const uint8x8_t alphas = vld1_u8(alpha + i);
rgbX.val[0] = alphas;
vst4_u8((uint8_t*)(dst + 4 * i), rgbX);
mask8 = vand_u8(mask8, alphas);
}
for (; i < width; ++i) {
const uint32_t alpha_value = alpha[i];
dst[4 * i] = alpha_value;
alpha_mask &= alpha_value;
}
alpha += alpha_stride;
dst += dst_stride;
}
vst1_u8((uint8_t*)tmp, mask8);
alpha_mask &= tmp[0];
alpha_mask &= tmp[1];
return (alpha_mask != 0xffffffffu);
}
static void DispatchAlphaToGreen_NEON(const uint8_t* alpha, int alpha_stride,
int width, int height,
uint32_t* dst, int dst_stride) {
int i, j;
uint8x8x4_t greens; // leave A/R/B channels zero'd.
greens.val[0] = vdup_n_u8(0);
greens.val[2] = vdup_n_u8(0);
greens.val[3] = vdup_n_u8(0);
for (j = 0; j < height; ++j) {
for (i = 0; i + 8 <= width; i += 8) {
greens.val[1] = vld1_u8(alpha + i);
vst4_u8((uint8_t*)(dst + i), greens);
}
for (; i < width; ++i) dst[i] = alpha[i] << 8;
alpha += alpha_stride;
dst += dst_stride;
}
}
static int ExtractAlpha_NEON(const uint8_t* argb, int argb_stride,
int width, int height,
uint8_t* alpha, int alpha_stride) {
uint32_t alpha_mask = 0xffffffffu;
uint8x8_t mask8 = vdup_n_u8(0xff);
uint32_t tmp[2];
int i, j;
for (j = 0; j < height; ++j) {
// We don't know if alpha is first or last in dst[] (depending on rgbA/Argb
// mode). So we must be sure dst[4*i + 8 - 1] is writable for the store.
// Hence the test with 'width - 1' instead of just 'width'.
for (i = 0; i + 8 <= width - 1; i += 8) {
const uint8x8x4_t rgbX = vld4_u8((const uint8_t*)(argb + 4 * i));
const uint8x8_t alphas = rgbX.val[0];
vst1_u8((uint8_t*)(alpha + i), alphas);
mask8 = vand_u8(mask8, alphas);
}
for (; i < width; ++i) {
alpha[i] = argb[4 * i];
alpha_mask &= alpha[i];
}
argb += argb_stride;
alpha += alpha_stride;
}
vst1_u8((uint8_t*)tmp, mask8);
alpha_mask &= tmp[0];
alpha_mask &= tmp[1];
return (alpha_mask == 0xffffffffu);
}
static void ExtractGreen_NEON(const uint32_t* argb,
uint8_t* alpha, int size) {
int i;
for (i = 0; i + 16 <= size; i += 16) {
const uint8x16x4_t rgbX = vld4q_u8((const uint8_t*)(argb + i));
const uint8x16_t greens = rgbX.val[1];
vst1q_u8(alpha + i, greens);
}
for (; i < size; ++i) alpha[i] = (argb[i] >> 8) & 0xff;
}
//------------------------------------------------------------------------------
extern void WebPInitAlphaProcessingNEON(void);
WEBP_TSAN_IGNORE_FUNCTION void WebPInitAlphaProcessingNEON(void) {
WebPApplyAlphaMultiply = ApplyAlphaMultiply_NEON;
WebPDispatchAlpha = DispatchAlpha_NEON;
WebPDispatchAlphaToGreen = DispatchAlphaToGreen_NEON;
WebPExtractAlpha = ExtractAlpha_NEON;
WebPExtractGreen = ExtractGreen_NEON;
}
#else // !WEBP_USE_NEON
WEBP_DSP_INIT_STUB(WebPInitAlphaProcessingNEON)
#endif // WEBP_USE_NEON

329
media/libwebp/dsp/filters_neon.c

@ -0,0 +1,329 @@
// Copyright 2017 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING 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.
// -----------------------------------------------------------------------------
//
// NEON variant of alpha filters
//
// Author: Skal (pascal.massimino@gmail.com)
#include "../dsp/dsp.h"
#if defined(WEBP_USE_NEON)
#include <assert.h>
#include "../dsp/neon.h"
//------------------------------------------------------------------------------
// Helpful macros.
# define SANITY_CHECK(in, out) \
assert(in != NULL); \
assert(out != NULL); \
assert(width > 0); \
assert(height > 0); \
assert(stride >= width); \
assert(row >= 0 && num_rows > 0 && row + num_rows <= height); \
(void)height; // Silence unused warning.
// load eight u8 and widen to s16
#define U8_TO_S16(A) vreinterpretq_s16_u16(vmovl_u8(A))
#define LOAD_U8_TO_S16(A) U8_TO_S16(vld1_u8(A))
// shift left or right by N byte, inserting zeros
#define SHIFT_RIGHT_N_Q(A, N) vextq_u8((A), zero, (N))
#define SHIFT_LEFT_N_Q(A, N) vextq_u8(zero, (A), (16 - (N)) % 16)
// rotate left by N bytes
#define ROTATE_LEFT_N(A, N) vext_u8((A), (A), (N))
// rotate right by N bytes
#define ROTATE_RIGHT_N(A, N) vext_u8((A), (A), (8 - (N)) % 8)
static void PredictLine_NEON(const uint8_t* src, const uint8_t* pred,
uint8_t* dst, int length) {
int i;
assert(length >= 0);
for (i = 0; i + 16 <= length; i += 16) {
const uint8x16_t A = vld1q_u8(&src[i]);
const uint8x16_t B = vld1q_u8(&pred[i]);
const uint8x16_t C = vsubq_u8(A, B);
vst1q_u8(&dst[i], C);
}
for (; i < length; ++i) dst[i] = src[i] - pred[i];
}
// Special case for left-based prediction (when preds==dst-1 or preds==src-1).
static void PredictLineLeft_NEON(const uint8_t* src, uint8_t* dst, int length) {
PredictLine_NEON(src, src - 1, dst, length);
}
//------------------------------------------------------------------------------
// Horizontal filter.
static WEBP_INLINE void DoHorizontalFilter_NEON(const uint8_t* in,
int width, int height,
int stride,
int row, int num_rows,
uint8_t* out) {
const size_t start_offset = row * stride;
const int last_row = row + num_rows;
SANITY_CHECK(in, out);
in += start_offset;
out += start_offset;
if (row == 0) {
// Leftmost pixel is the same as input for topmost scanline.
out[0] = in[0];
PredictLineLeft_NEON(in + 1, out + 1, width - 1);
row = 1;
in += stride;
out += stride;
}
// Filter line-by-line.
while (row < last_row) {
// Leftmost pixel is predicted from above.
out[0] = in[0] - in[-stride];
PredictLineLeft_NEON(in + 1, out + 1, width - 1);
++row;
in += stride;
out += stride;
}
}
static void HorizontalFilter_NEON(const uint8_t* data, int width, int height,
int stride, uint8_t* filtered_data) {
DoHorizontalFilter_NEON(data, width, height, stride, 0, height,
filtered_data);
}
//------------------------------------------------------------------------------
// Vertical filter.
static WEBP_INLINE void DoVerticalFilter_NEON(const uint8_t* in,
int width, int height, int stride,
int row, int num_rows,
uint8_t* out) {
const size_t start_offset = row * stride;
const int last_row = row + num_rows;
SANITY_CHECK(in, out);
in += start_offset;
out += start_offset;
if (row == 0) {
// Very first top-left pixel is copied.
out[0] = in[0];
// Rest of top scan-line is left-predicted.
PredictLineLeft_NEON(in + 1, out + 1, width - 1);
row = 1;
in += stride;
out += stride;
}
// Filter line-by-line.
while (row < last_row) {
PredictLine_NEON(in, in - stride, out, width);
++row;
in += stride;
out += stride;
}
}
static void VerticalFilter_NEON(const uint8_t* data, int width, int height,
int stride, uint8_t* filtered_data) {
DoVerticalFilter_NEON(data, width, height, stride, 0, height,
filtered_data);
}
//------------------------------------------------------------------------------
// Gradient filter.
static WEBP_INLINE int GradientPredictor_C(uint8_t a, uint8_t b, uint8_t c) {
const int g = a + b - c;
return ((g & ~0xff) == 0) ? g : (g < 0) ? 0 : 255; // clip to 8bit
}
static void GradientPredictDirect_NEON(const uint8_t* const row,
const uint8_t* const top,
uint8_t* const out, int length) {
int i;
for (i = 0; i + 8 <= length; i += 8) {
const uint8x8_t A = vld1_u8(&row[i - 1]);
const uint8x8_t B = vld1_u8(&top[i + 0]);
const int16x8_t C = vreinterpretq_s16_u16(vaddl_u8(A, B));
const int16x8_t D = LOAD_U8_TO_S16(&top[i - 1]);
const uint8x8_t E = vqmovun_s16(vsubq_s16(C, D));
const uint8x8_t F = vld1_u8(&row[i + 0]);
vst1_u8(&out[i], vsub_u8(F, E));
}
for (; i < length; ++i) {
out[i] = row[i] - GradientPredictor_C(row[i - 1], top[i], top[i - 1]);
}
}
static WEBP_INLINE void DoGradientFilter_NEON(const uint8_t* in,
int width, int height,
int stride,
int row, int num_rows,
uint8_t* out) {
const size_t start_offset = row * stride;
const int last_row = row + num_rows;
SANITY_CHECK(in, out);
in += start_offset;
out += start_offset;
// left prediction for top scan-line
if (row == 0) {
out[0] = in[0];
PredictLineLeft_NEON(in + 1, out + 1, width - 1);
row = 1;
in += stride;
out += stride;
}
// Filter line-by-line.
while (row < last_row) {
out[0] = in[0] - in[-stride];
GradientPredictDirect_NEON(in + 1, in + 1 - stride, out + 1, width - 1);
++row;
in += stride;
out += stride;
}
}
static void GradientFilter_NEON(const uint8_t* data, int width, int height,
int stride, uint8_t* filtered_data) {
DoGradientFilter_NEON(data, width, height, stride, 0, height,
filtered_data);
}
#undef SANITY_CHECK
//------------------------------------------------------------------------------
// Inverse transforms
static void HorizontalUnfilter_NEON(const uint8_t* prev, const uint8_t* in,
uint8_t* out, int width) {
int i;
const uint8x16_t zero = vdupq_n_u8(0);
uint8x16_t last;
out[0] = in[0] + (prev == NULL ? 0 : prev[0]);
if (width <= 1) return;
last = vsetq_lane_u8(out[0], zero, 0);
for (i = 1; i + 16 <= width; i += 16) {
const uint8x16_t A0 = vld1q_u8(&in[i]);
const uint8x16_t A1 = vaddq_u8(A0, last);
const uint8x16_t A2 = SHIFT_LEFT_N_Q(A1, 1);
const uint8x16_t A3 = vaddq_u8(A1, A2);
const uint8x16_t A4 = SHIFT_LEFT_N_Q(A3, 2);
const uint8x16_t A5 = vaddq_u8(A3, A4);
const uint8x16_t A6 = SHIFT_LEFT_N_Q(A5, 4);
const uint8x16_t A7 = vaddq_u8(A5, A6);
const uint8x16_t A8 = SHIFT_LEFT_N_Q(A7, 8);
const uint8x16_t A9 = vaddq_u8(A7, A8);
vst1q_u8(&out[i], A9);
last = SHIFT_RIGHT_N_Q(A9, 15);
}
for (; i < width; ++i) out[i] = in[i] + out[i - 1];
}
static void VerticalUnfilter_NEON(const uint8_t* prev, const uint8_t* in,
uint8_t* out, int width) {
if (prev == NULL) {
HorizontalUnfilter_NEON(NULL, in, out, width);
} else {
int i;
assert(width >= 0);
for (i = 0; i + 16 <= width; i += 16) {
const uint8x16_t A = vld1q_u8(&in[i]);
const uint8x16_t B = vld1q_u8(&prev[i]);
const uint8x16_t C = vaddq_u8(A, B);
vst1q_u8(&out[i], C);
}
for (; i < width; ++i) out[i] = in[i] + prev[i];
}
}
// GradientUnfilter_NEON is correct but slower than the C-version,
// at least on ARM64. For armv7, it's a wash.
// So best is to disable it for now, but keep the idea around...
#if !defined(USE_GRADIENT_UNFILTER)
#define USE_GRADIENT_UNFILTER 0 // ALTERNATE_CODE
#endif
#if (USE_GRADIENT_UNFILTER == 1)
#define GRAD_PROCESS_LANE(L) do { \
const uint8x8_t tmp1 = ROTATE_RIGHT_N(pred, 1); /* rotate predictor in */ \
const int16x8_t tmp2 = vaddq_s16(BC, U8_TO_S16(tmp1)); \
const uint8x8_t delta = vqmovun_s16(tmp2); \
pred = vadd_u8(D, delta); \
out = vext_u8(out, ROTATE_LEFT_N(pred, (L)), 1); \
} while (0)
static void GradientPredictInverse_NEON(const uint8_t* const in,
const uint8_t* const top,
uint8_t* const row, int length) {
if (length > 0) {
int i;
uint8x8_t pred = vdup_n_u8(row[-1]); // left sample
uint8x8_t out = vdup_n_u8(0);
for (i = 0; i + 8 <= length; i += 8) {
const int16x8_t B = LOAD_U8_TO_S16(&top[i + 0]);
const int16x8_t C = LOAD_U8_TO_S16(&top[i - 1]);
const int16x8_t BC = vsubq_s16(B, C); // unclipped gradient basis B - C
const uint8x8_t D = vld1_u8(&in[i]); // base input
GRAD_PROCESS_LANE(0);
GRAD_PROCESS_LANE(1);
GRAD_PROCESS_LANE(2);
GRAD_PROCESS_LANE(3);
GRAD_PROCESS_LANE(4);
GRAD_PROCESS_LANE(5);
GRAD_PROCESS_LANE(6);
GRAD_PROCESS_LANE(7);
vst1_u8(&row[i], out);
}
for (; i < length; ++i) {
row[i] = in[i] + GradientPredictor_C(row[i - 1], top[i], top[i - 1]);
}
}
}
#undef GRAD_PROCESS_LANE
static void GradientUnfilter_NEON(const uint8_t* prev, const uint8_t* in,
uint8_t* out, int width) {
if (prev == NULL) {
HorizontalUnfilter_NEON(NULL, in, out, width);
} else {
out[0] = in[0] + prev[0]; // predict from above
GradientPredictInverse_NEON(in + 1, prev + 1, out + 1, width - 1);
}
}
#endif // USE_GRADIENT_UNFILTER
//------------------------------------------------------------------------------
// Entry point
extern void VP8FiltersInitNEON(void);
WEBP_TSAN_IGNORE_FUNCTION void VP8FiltersInitNEON(void) {
WebPUnfilters[WEBP_FILTER_HORIZONTAL] = HorizontalUnfilter_NEON;
WebPUnfilters[WEBP_FILTER_VERTICAL] = VerticalUnfilter_NEON;
#if (USE_GRADIENT_UNFILTER == 1)
WebPUnfilters[WEBP_FILTER_GRADIENT] = GradientUnfilter_NEON;
#endif
WebPFilters[WEBP_FILTER_HORIZONTAL] = HorizontalFilter_NEON;
WebPFilters[WEBP_FILTER_VERTICAL] = VerticalFilter_NEON;
WebPFilters[WEBP_FILTER_GRADIENT] = GradientFilter_NEON;
}
#else // !WEBP_USE_NEON
WEBP_DSP_INIT_STUB(VP8FiltersInitNEON)
#endif // WEBP_USE_NEON

6
media/libwebp/dsp/moz.build

@ -9,6 +9,7 @@ with Files('**'):
SOURCES += [
'alpha_processing.c',
'alpha_processing_neon.c',
'alpha_processing_sse2.c',
'alpha_processing_sse41.c',
'dec.c',
@ -17,6 +18,7 @@ SOURCES += [
'dec_sse2.c',
'dec_sse41.c',
'filters.c',
'filters_neon.c',
'filters_sse2.c',
'lossless.c',
'lossless_neon.c',
@ -29,15 +31,19 @@ SOURCES += [
'upsampling_sse2.c',
'upsampling_sse41.c',
'yuv.c',
'yuv_neon.c',
'yuv_sse2.c',
'yuv_sse41.c',
]
if CONFIG['CPU_ARCH'] == 'arm' and CONFIG['BUILD_ARM_NEON']:
SOURCES['alpha_processing_neon.c'].flags += CONFIG['NEON_FLAGS']
SOURCES['dec_neon.c'].flags += CONFIG['NEON_FLAGS']
SOURCES['filters_neon.c'].flags += CONFIG['NEON_FLAGS']
SOURCES['lossless_neon.c'].flags += CONFIG['NEON_FLAGS']
SOURCES['rescaler_neon.c'].flags += CONFIG['NEON_FLAGS']
SOURCES['upsampling_neon.c'].flags += CONFIG['NEON_FLAGS']
SOURCES['yuv_neon.c'].flags += CONFIG['NEON_FLAGS']
elif CONFIG['INTEL_ARCHITECTURE']:
SOURCES['alpha_processing_sse2.c'].flags += CONFIG['SSE2_FLAGS']
SOURCES['alpha_processing_sse41.c'].flags += CONFIG['SSE2_FLAGS']

288
media/libwebp/dsp/yuv_neon.c

@ -0,0 +1,288 @@
// Copyright 2017 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING 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.
// -----------------------------------------------------------------------------
//
// YUV->RGB conversion functions
//
// Author: Skal (pascal.massimino@gmail.com)
#include "../dsp/yuv.h"
#if defined(WEBP_USE_NEON)
#include <assert.h>
#include <stdlib.h>
#include "../dsp/neon.h"
//-----------------------------------------------------------------------------
static uint8x8_t ConvertRGBToY_NEON(const uint8x8_t R,
const uint8x8_t G,
const uint8x8_t B) {
const uint16x8_t r = vmovl_u8(R);
const uint16x8_t g = vmovl_u8(G);
const uint16x8_t b = vmovl_u8(B);
const uint16x4_t r_lo = vget_low_u16(r);
const uint16x4_t r_hi = vget_high_u16(r);
const uint16x4_t g_lo = vget_low_u16(g);
const uint16x4_t g_hi = vget_high_u16(g);
const uint16x4_t b_lo = vget_low_u16(b);
const uint16x4_t b_hi = vget_high_u16(b);
const uint32x4_t tmp0_lo = vmull_n_u16( r_lo, 16839u);
const uint32x4_t tmp0_hi = vmull_n_u16( r_hi, 16839u);
const uint32x4_t tmp1_lo = vmlal_n_u16(tmp0_lo, g_lo, 33059u);
const uint32x4_t tmp1_hi = vmlal_n_u16(tmp0_hi, g_hi, 33059u);
const uint32x4_t tmp2_lo = vmlal_n_u16(tmp1_lo, b_lo, 6420u);
const uint32x4_t tmp2_hi = vmlal_n_u16(tmp1_hi, b_hi, 6420u);
const uint16x8_t Y1 = vcombine_u16(vrshrn_n_u32(tmp2_lo, 16),
vrshrn_n_u32(tmp2_hi, 16));
const uint16x8_t Y2 = vaddq_u16(Y1, vdupq_n_u16(16));
return vqmovn_u16(Y2);
}
static void ConvertRGB24ToY_NEON(const uint8_t* rgb, uint8_t* y, int width) {
int i;
for (i = 0; i + 8 <= width; i += 8, rgb += 3 * 8) {
const uint8x8x3_t RGB = vld3_u8(rgb);
const uint8x8_t Y = ConvertRGBToY_NEON(RGB.val[0], RGB.val[1], RGB.val[2]);
vst1_u8(y + i, Y);
}
for (; i < width; ++i, rgb += 3) { // left-over
y[i] = VP8RGBToY(rgb[0], rgb[1], rgb[2], YUV_HALF);
}
}
static void ConvertBGR24ToY_NEON(const uint8_t* bgr, uint8_t* y, int width) {
int i;
for (i = 0; i + 8 <= width; i += 8, bgr += 3 * 8) {
const uint8x8x3_t BGR = vld3_u8(bgr);
const uint8x8_t Y = ConvertRGBToY_NEON(BGR.val[2], BGR.val[1], BGR.val[0]);
vst1_u8(y + i, Y);
}
for (; i < width; ++i, bgr += 3) { // left-over
y[i] = VP8RGBToY(bgr[2], bgr[1], bgr[0], YUV_HALF);
}
}
static void ConvertARGBToY_NEON(const uint32_t* argb, uint8_t* y, int width) {
int i;
for (i = 0; i + 8 <= width; i += 8) {
const uint8x8x4_t RGB = vld4_u8((const uint8_t*)&argb[i]);
const uint8x8_t Y = ConvertRGBToY_NEON(RGB.val[2], RGB.val[1], RGB.val[0]);
vst1_u8(y + i, Y);
}
for (; i < width; ++i) { // left-over
const uint32_t p = argb[i];
y[i] = VP8RGBToY((p >> 16) & 0xff, (p >> 8) & 0xff, (p >> 0) & 0xff,
YUV_HALF);
}
}
//-----------------------------------------------------------------------------
// computes: DST_s16 = [(C0 * r + C1 * g + C2 * b) >> 16] + CST
#define MULTIPLY_16b_PREAMBLE(r, g, b) \
const int16x4_t r_lo = vreinterpret_s16_u16(vget_low_u16(r)); \
const int16x4_t r_hi = vreinterpret_s16_u16(vget_high_u16(r)); \
const int16x4_t g_lo = vreinterpret_s16_u16(vget_low_u16(g)); \
const int16x4_t g_hi = vreinterpret_s16_u16(vget_high_u16(g)); \
const int16x4_t b_lo = vreinterpret_s16_u16(vget_low_u16(b)); \
const int16x4_t b_hi = vreinterpret_s16_u16(vget_high_u16(b))
#define MULTIPLY_16b(C0, C1, C2, CST, DST_s16) do { \
const int32x4_t tmp0_lo = vmull_n_s16( r_lo, C0); \
const int32x4_t tmp0_hi = vmull_n_s16( r_hi, C0); \
const int32x4_t tmp1_lo = vmlal_n_s16(tmp0_lo, g_lo, C1); \
const int32x4_t tmp1_hi = vmlal_n_s16(tmp0_hi, g_hi, C1); \
const int32x4_t tmp2_lo = vmlal_n_s16(tmp1_lo, b_lo, C2); \
const int32x4_t tmp2_hi = vmlal_n_s16(tmp1_hi, b_hi, C2); \
const int16x8_t tmp3 = vcombine_s16(vshrn_n_s32(tmp2_lo, 16), \
vshrn_n_s32(tmp2_hi, 16)); \
DST_s16 = vaddq_s16(tmp3, vdupq_n_s16(CST)); \
} while (0)
// This needs to be a macro, since (128 << SHIFT) needs to be an immediate.
#define CONVERT_RGB_TO_UV(r, g, b, SHIFT, U_DST, V_DST) do { \
MULTIPLY_16b_PREAMBLE(r, g, b); \
MULTIPLY_16b(-9719, -19081, 28800, 128 << SHIFT, U_DST); \
MULTIPLY_16b(28800, -24116, -4684, 128 << SHIFT, V_DST); \
} while (0)
static void ConvertRGBA32ToUV_NEON(const uint16_t* rgb,
uint8_t* u, uint8_t* v, int width) {
int i;
for (i = 0; i + 8 <= width; i += 8, rgb += 4 * 8) {
const uint16x8x4_t RGB = vld4q_u16((const uint16_t*)rgb);
int16x8_t U, V;
CONVERT_RGB_TO_UV(RGB.val[0], RGB.val[1], RGB.val[2], 2, U, V);
vst1_u8(u + i, vqrshrun_n_s16(U, 2));
vst1_u8(v + i, vqrshrun_n_s16(V, 2));
}
for (; i < width; i += 1, rgb += 4) {
const int r = rgb[0], g = rgb[1], b = rgb[2];
u[i] = VP8RGBToU(r, g, b, YUV_HALF << 2);
v[i] = VP8RGBToV(r, g, b, YUV_HALF << 2);
}
}
static void ConvertARGBToUV_NEON(const uint32_t* argb, uint8_t* u, uint8_t* v,
int src_width, int do_store) {
int i;
for (i = 0; i + 16 <= src_width; i += 16, u += 8, v += 8) {
const uint8x16x4_t RGB = vld4q_u8((const uint8_t*)&argb[i]);
const uint16x8_t R = vpaddlq_u8(RGB.val[2]); // pair-wise adds
const uint16x8_t G = vpaddlq_u8(RGB.val[1]);
const uint16x8_t B = vpaddlq_u8(RGB.val[0]);
int16x8_t U_tmp, V_tmp;
CONVERT_RGB_TO_UV(R, G, B, 1, U_tmp, V_tmp);
{
const uint8x8_t U = vqrshrun_n_s16(U_tmp, 1);
const uint8x8_t V = vqrshrun_n_s16(V_tmp, 1);
if (do_store) {
vst1_u8(u, U);
vst1_u8(v, V);
} else {
const uint8x8_t prev_u = vld1_u8(u);
const uint8x8_t prev_v = vld1_u8(v);
vst1_u8(u, vrhadd_u8(U, prev_u));
vst1_u8(v, vrhadd_u8(V, prev_v));
}
}
}
if (i < src_width) { // left-over
WebPConvertARGBToUV_C(argb + i, u, v, src_width - i, do_store);
}
}
//------------------------------------------------------------------------------
extern void WebPInitConvertARGBToYUVNEON(void);
WEBP_TSAN_IGNORE_FUNCTION void WebPInitConvertARGBToYUVNEON(void) {
WebPConvertRGB24ToY = ConvertRGB24ToY_NEON;
WebPConvertBGR24ToY = ConvertBGR24ToY_NEON;
WebPConvertARGBToY = ConvertARGBToY_NEON;
WebPConvertARGBToUV = ConvertARGBToUV_NEON;
WebPConvertRGBA32ToUV = ConvertRGBA32ToUV_NEON;
}
//------------------------------------------------------------------------------
#define MAX_Y ((1 << 10) - 1) // 10b precision over 16b-arithmetic
static uint16_t clip_y_NEON(int v) {
return (v < 0) ? 0 : (v > MAX_Y) ? MAX_Y : (uint16_t)v;
}
static uint64_t SharpYUVUpdateY_NEON(const uint16_t* ref, const uint16_t* src,
uint16_t* dst, int len) {
int i;
const int16x8_t zero = vdupq_n_s16(0);
const int16x8_t max = vdupq_n_s16(MAX_Y);
uint64x2_t sum = vdupq_n_u64(0);
uint64_t diff;
for (i = 0; i + 8 <= len; i += 8) {
const int16x8_t A = vreinterpretq_s16_u16(vld1q_u16(ref + i));
const int16x8_t B = vreinterpretq_s16_u16(vld1q_u16(src + i));
const int16x8_t C = vreinterpretq_s16_u16(vld1q_u16(dst + i));
const int16x8_t D = vsubq_s16(A, B); // diff_y
const int16x8_t F = vaddq_s16(C, D); // new_y
const uint16x8_t H =
vreinterpretq_u16_s16(vmaxq_s16(vminq_s16(F, max), zero));
const int16x8_t I = vabsq_s16(D); // abs(diff_y)
vst1q_u16(dst + i, H);
sum = vpadalq_u32(sum, vpaddlq_u16(vreinterpretq_u16_s16(I)));
}
diff = vgetq_lane_u64(sum, 0) + vgetq_lane_u64(sum, 1);
for (; i < len; ++i) {
const int diff_y = ref[i] - src[i];
const int new_y = (int)(dst[i]) + diff_y;
dst[i] = clip_y_NEON(new_y);
diff += (uint64_t)(abs(diff_y));
}
return diff;
}
static void SharpYUVUpdateRGB_NEON(const int16_t* ref, const int16_t* src,
int16_t* dst, int len) {
int i;
for (i = 0; i + 8 <= len; i += 8) {
const int16x8_t A = vld1q_s16(ref + i);
const int16x8_t B = vld1q_s16(src + i);
const int16x8_t C = vld1q_s16(dst + i);
const int16x8_t D = vsubq_s16(A, B); // diff_uv
const int16x8_t E = vaddq_s16(C, D); // new_uv
vst1q_s16(dst + i, E);
}
for (; i < len; ++i) {
const int diff_uv = ref[i] - src[i];
dst[i] += diff_uv;
}
}
static void SharpYUVFilterRow_NEON(const int16_t* A, const int16_t* B, int len,
const uint16_t* best_y, uint16_t* out) {
int i;
const int16x8_t max = vdupq_n_s16(MAX_Y);
const int16x8_t zero = vdupq_n_s16(0);
for (i = 0; i + 8 <= len; i += 8) {
const int16x8_t a0 = vld1q_s16(A + i + 0);
const int16x8_t a1 = vld1q_s16(A + i + 1);
const int16x8_t b0 = vld1q_s16(B + i + 0);
const int16x8_t b1 = vld1q_s16(B + i + 1);
const int16x8_t a0b1 = vaddq_s16(a0, b1);
const int16x8_t a1b0 = vaddq_s16(a1, b0);
const int16x8_t a0a1b0b1 = vaddq_s16(a0b1, a1b0); // A0+A1+B0+B1
const int16x8_t a0b1_2 = vaddq_s16(a0b1, a0b1); // 2*(A0+B1)
const int16x8_t a1b0_2 = vaddq_s16(a1b0, a1b0); // 2*(A1+B0)
const int16x8_t c0 = vshrq_n_s16(vaddq_s16(a0b1_2, a0a1b0b1), 3);
const int16x8_t c1 = vshrq_n_s16(vaddq_s16(a1b0_2, a0a1b0b1), 3);
const int16x8_t d0 = vaddq_s16(c1, a0);
const int16x8_t d1 = vaddq_s16(c0, a1);
const int16x8_t e0 = vrshrq_n_s16(d0, 1);
const int16x8_t e1 = vrshrq_n_s16(d1, 1);
const int16x8x2_t f = vzipq_s16(e0, e1);
const int16x8_t g0 = vreinterpretq_s16_u16(vld1q_u16(best_y + 2 * i + 0));
const int16x8_t g1 = vreinterpretq_s16_u16(vld1q_u16(best_y + 2 * i + 8));
const int16x8_t h0 = vaddq_s16(g0, f.val[0]);
const int16x8_t h1 = vaddq_s16(g1, f.val[1]);
const int16x8_t i0 = vmaxq_s16(vminq_s16(h0, max), zero);
const int16x8_t i1 = vmaxq_s16(vminq_s16(h1, max), zero);
vst1q_u16(out + 2 * i + 0, vreinterpretq_u16_s16(i0));
vst1q_u16(out + 2 * i + 8, vreinterpretq_u16_s16(i1));
}
for (; i < len; ++i) {
const int a0b1 = A[i + 0] + B[i + 1];
const int a1b0 = A[i + 1] + B[i + 0];
const int a0a1b0b1 = a0b1 + a1b0 + 8;
const int v0 = (8 * A[i + 0] + 2 * a1b0 + a0a1b0b1) >> 4;
const int v1 = (8 * A[i + 1] + 2 * a0b1 + a0a1b0b1) >> 4;
out[2 * i + 0] = clip_y_NEON(best_y[2 * i + 0] + v0);
out[2 * i + 1] = clip_y_NEON(best_y[2 * i + 1] + v1);
}
}
#undef MAX_Y
//------------------------------------------------------------------------------
extern void WebPInitSharpYUVNEON(void);
WEBP_TSAN_IGNORE_FUNCTION void WebPInitSharpYUVNEON(void) {
WebPSharpYUVUpdateY = SharpYUVUpdateY_NEON;
WebPSharpYUVUpdateRGB = SharpYUVUpdateRGB_NEON;
WebPSharpYUVFilterRow = SharpYUVFilterRow_NEON;
}
#else // !WEBP_USE_NEON
WEBP_DSP_INIT_STUB(WebPInitConvertARGBToYUVNEON)
WEBP_DSP_INIT_STUB(WebPInitSharpYUVNEON)
#endif // WEBP_USE_NEON
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