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diff --git a/media/libwebp/src/dsp/lossless_enc_neon.c b/media/libwebp/src/dsp/lossless_enc_neon.c
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+// Copyright 2015 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 methods for lossless encoder
+//
+// Author: Skal (pascal.massimino@gmail.com)
+
+#include "src/dsp/dsp.h"
+
+#if defined(WEBP_USE_NEON)
+
+#include <arm_neon.h>
+
+#include "src/dsp/lossless.h"
+#include "src/dsp/neon.h"
+
+//------------------------------------------------------------------------------
+// Subtract-Green Transform
+
+// vtbl?_u8 are marked unavailable for iOS arm64 with Xcode < 6.3, use
+// non-standard versions there.
+#if defined(__APPLE__) && WEBP_AARCH64 && \
+ defined(__apple_build_version__) && (__apple_build_version__< 6020037)
+#define USE_VTBLQ
+#endif
+
+#ifdef USE_VTBLQ
+// 255 = byte will be zeroed
+static const uint8_t kGreenShuffle[16] = {
+ 1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255, 13, 255, 13, 255
+};
+
+static WEBP_INLINE uint8x16_t DoGreenShuffle_NEON(const uint8x16_t argb,
+ const uint8x16_t shuffle) {
+ return vcombine_u8(vtbl1q_u8(argb, vget_low_u8(shuffle)),
+ vtbl1q_u8(argb, vget_high_u8(shuffle)));
+}
+#else // !USE_VTBLQ
+// 255 = byte will be zeroed
+static const uint8_t kGreenShuffle[8] = { 1, 255, 1, 255, 5, 255, 5, 255 };
+
+static WEBP_INLINE uint8x16_t DoGreenShuffle_NEON(const uint8x16_t argb,
+ const uint8x8_t shuffle) {
+ return vcombine_u8(vtbl1_u8(vget_low_u8(argb), shuffle),
+ vtbl1_u8(vget_high_u8(argb), shuffle));
+}
+#endif // USE_VTBLQ
+
+static void SubtractGreenFromBlueAndRed_NEON(uint32_t* argb_data,
+ int num_pixels) {
+ const uint32_t* const end = argb_data + (num_pixels & ~3);
+#ifdef USE_VTBLQ
+ const uint8x16_t shuffle = vld1q_u8(kGreenShuffle);
+#else
+ const uint8x8_t shuffle = vld1_u8(kGreenShuffle);
+#endif
+ for (; argb_data < end; argb_data += 4) {
+ const uint8x16_t argb = vld1q_u8((uint8_t*)argb_data);
+ const uint8x16_t greens = DoGreenShuffle_NEON(argb, shuffle);
+ vst1q_u8((uint8_t*)argb_data, vsubq_u8(argb, greens));
+ }
+ // fallthrough and finish off with plain-C
+ VP8LSubtractGreenFromBlueAndRed_C(argb_data, num_pixels & 3);
+}
+
+//------------------------------------------------------------------------------
+// Color Transform
+
+static void TransformColor_NEON(const VP8LMultipliers* const m,
+ uint32_t* argb_data, int num_pixels) {
+ // sign-extended multiplying constants, pre-shifted by 6.
+#define CST(X) (((int16_t)(m->X << 8)) >> 6)
+ const int16_t rb[8] = {
+ CST(green_to_blue_), CST(green_to_red_),
+ CST(green_to_blue_), CST(green_to_red_),
+ CST(green_to_blue_), CST(green_to_red_),
+ CST(green_to_blue_), CST(green_to_red_)
+ };
+ const int16x8_t mults_rb = vld1q_s16(rb);
+ const int16_t b2[8] = {
+ 0, CST(red_to_blue_), 0, CST(red_to_blue_),
+ 0, CST(red_to_blue_), 0, CST(red_to_blue_),
+ };
+ const int16x8_t mults_b2 = vld1q_s16(b2);
+#undef CST
+#ifdef USE_VTBLQ
+ static const uint8_t kg0g0[16] = {
+ 255, 1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255, 13, 255, 13
+ };
+ const uint8x16_t shuffle = vld1q_u8(kg0g0);
+#else
+ static const uint8_t k0g0g[8] = { 255, 1, 255, 1, 255, 5, 255, 5 };
+ const uint8x8_t shuffle = vld1_u8(k0g0g);
+#endif
+ const uint32x4_t mask_rb = vdupq_n_u32(0x00ff00ffu); // red-blue masks
+ int i;
+ for (i = 0; i + 4 <= num_pixels; i += 4) {
+ const uint8x16_t in = vld1q_u8((uint8_t*)(argb_data + i));
+ // 0 g 0 g
+ const uint8x16_t greens = DoGreenShuffle_NEON(in, shuffle);
+ // x dr x db1
+ const int16x8_t A = vqdmulhq_s16(vreinterpretq_s16_u8(greens), mults_rb);
+ // r 0 b 0
+ const int16x8_t B = vshlq_n_s16(vreinterpretq_s16_u8(in), 8);
+ // x db2 0 0
+ const int16x8_t C = vqdmulhq_s16(B, mults_b2);
+ // 0 0 x db2
+ const uint32x4_t D = vshrq_n_u32(vreinterpretq_u32_s16(C), 16);
+ // x dr x db
+ const int8x16_t E = vaddq_s8(vreinterpretq_s8_u32(D),
+ vreinterpretq_s8_s16(A));
+ // 0 dr 0 db
+ const uint32x4_t F = vandq_u32(vreinterpretq_u32_s8(E), mask_rb);
+ const int8x16_t out = vsubq_s8(vreinterpretq_s8_u8(in),
+ vreinterpretq_s8_u32(F));
+ vst1q_s8((int8_t*)(argb_data + i), out);
+ }
+ // fallthrough and finish off with plain-C
+ VP8LTransformColor_C(m, argb_data + i, num_pixels - i);
+}
+
+#undef USE_VTBLQ
+
+//------------------------------------------------------------------------------
+// Entry point
+
+extern void VP8LEncDspInitNEON(void);
+
+WEBP_TSAN_IGNORE_FUNCTION void VP8LEncDspInitNEON(void) {
+ VP8LSubtractGreenFromBlueAndRed = SubtractGreenFromBlueAndRed_NEON;
+ VP8LTransformColor = TransformColor_NEON;
+}
+
+#else // !WEBP_USE_NEON
+
+WEBP_DSP_INIT_STUB(VP8LEncDspInitNEON)
+
+#endif // WEBP_USE_NEON