Import aom library

This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

1 files changed, 224 insertions, 0 deletions

diff --git a/third_party/aom/aom_dsp/arm/sad_neon.c b/third_party/aom/aom_dsp/arm/sad_neon.c
new file mode 100644
index 000000000..2f452f55b
--- /dev/null
+++ b/third_party/aom/aom_dsp/arm/sad_neon.c
@@ -0,0 +1,224 @@
+/*
+ * 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 <arm_neon.h>
+
+#include "./aom_config.h"
+
+#include "aom/aom_integer.h"
+
+unsigned int aom_sad8x16_neon(unsigned char *src_ptr, int src_stride,
+                              unsigned char *ref_ptr, int ref_stride) {
+  uint8x8_t d0, d8;
+  uint16x8_t q12;
+  uint32x4_t q1;
+  uint64x2_t q3;
+  uint32x2_t d5;
+  int i;
+
+  d0 = vld1_u8(src_ptr);
+  src_ptr += src_stride;
+  d8 = vld1_u8(ref_ptr);
+  ref_ptr += ref_stride;
+  q12 = vabdl_u8(d0, d8);
+
+  for (i = 0; i < 15; i++) {
+    d0 = vld1_u8(src_ptr);
+    src_ptr += src_stride;
+    d8 = vld1_u8(ref_ptr);
+    ref_ptr += ref_stride;
+    q12 = vabal_u8(q12, d0, d8);
+  }
+
+  q1 = vpaddlq_u16(q12);
+  q3 = vpaddlq_u32(q1);
+  d5 = vadd_u32(vreinterpret_u32_u64(vget_low_u64(q3)),
+                vreinterpret_u32_u64(vget_high_u64(q3)));
+
+  return vget_lane_u32(d5, 0);
+}
+
+unsigned int aom_sad4x4_neon(unsigned char *src_ptr, int src_stride,
+                             unsigned char *ref_ptr, int ref_stride) {
+  uint8x8_t d0, d8;
+  uint16x8_t q12;
+  uint32x2_t d1;
+  uint64x1_t d3;
+  int i;
+
+  d0 = vld1_u8(src_ptr);
+  src_ptr += src_stride;
+  d8 = vld1_u8(ref_ptr);
+  ref_ptr += ref_stride;
+  q12 = vabdl_u8(d0, d8);
+
+  for (i = 0; i < 3; i++) {
+    d0 = vld1_u8(src_ptr);
+    src_ptr += src_stride;
+    d8 = vld1_u8(ref_ptr);
+    ref_ptr += ref_stride;
+    q12 = vabal_u8(q12, d0, d8);
+  }
+
+  d1 = vpaddl_u16(vget_low_u16(q12));
+  d3 = vpaddl_u32(d1);
+
+  return vget_lane_u32(vreinterpret_u32_u64(d3), 0);
+}
+
+unsigned int aom_sad16x8_neon(unsigned char *src_ptr, int src_stride,
+                              unsigned char *ref_ptr, int ref_stride) {
+  uint8x16_t q0, q4;
+  uint16x8_t q12, q13;
+  uint32x4_t q1;
+  uint64x2_t q3;
+  uint32x2_t d5;
+  int i;
+
+  q0 = vld1q_u8(src_ptr);
+  src_ptr += src_stride;
+  q4 = vld1q_u8(ref_ptr);
+  ref_ptr += ref_stride;
+  q12 = vabdl_u8(vget_low_u8(q0), vget_low_u8(q4));
+  q13 = vabdl_u8(vget_high_u8(q0), vget_high_u8(q4));
+
+  for (i = 0; i < 7; i++) {
+    q0 = vld1q_u8(src_ptr);
+    src_ptr += src_stride;
+    q4 = vld1q_u8(ref_ptr);
+    ref_ptr += ref_stride;
+    q12 = vabal_u8(q12, vget_low_u8(q0), vget_low_u8(q4));
+    q13 = vabal_u8(q13, vget_high_u8(q0), vget_high_u8(q4));
+  }
+
+  q12 = vaddq_u16(q12, q13);
+  q1 = vpaddlq_u16(q12);
+  q3 = vpaddlq_u32(q1);
+  d5 = vadd_u32(vreinterpret_u32_u64(vget_low_u64(q3)),
+                vreinterpret_u32_u64(vget_high_u64(q3)));
+
+  return vget_lane_u32(d5, 0);
+}
+
+static INLINE unsigned int horizontal_long_add_16x8(const uint16x8_t vec_lo,
+                                                    const uint16x8_t vec_hi) {
+  const uint32x4_t vec_l_lo =
+      vaddl_u16(vget_low_u16(vec_lo), vget_high_u16(vec_lo));
+  const uint32x4_t vec_l_hi =
+      vaddl_u16(vget_low_u16(vec_hi), vget_high_u16(vec_hi));
+  const uint32x4_t a = vaddq_u32(vec_l_lo, vec_l_hi);
+  const uint64x2_t b = vpaddlq_u32(a);
+  const uint32x2_t c = vadd_u32(vreinterpret_u32_u64(vget_low_u64(b)),
+                                vreinterpret_u32_u64(vget_high_u64(b)));
+  return vget_lane_u32(c, 0);
+}
+static INLINE unsigned int horizontal_add_16x8(const uint16x8_t vec_16x8) {
+  const uint32x4_t a = vpaddlq_u16(vec_16x8);
+  const uint64x2_t b = vpaddlq_u32(a);
+  const uint32x2_t c = vadd_u32(vreinterpret_u32_u64(vget_low_u64(b)),
+                                vreinterpret_u32_u64(vget_high_u64(b)));
+  return vget_lane_u32(c, 0);
+}
+
+unsigned int aom_sad64x64_neon(const uint8_t *src, int src_stride,
+                               const uint8_t *ref, int ref_stride) {
+  int i;
+  uint16x8_t vec_accum_lo = vdupq_n_u16(0);
+  uint16x8_t vec_accum_hi = vdupq_n_u16(0);
+  for (i = 0; i < 64; ++i) {
+    const uint8x16_t vec_src_00 = vld1q_u8(src);
+    const uint8x16_t vec_src_16 = vld1q_u8(src + 16);
+    const uint8x16_t vec_src_32 = vld1q_u8(src + 32);
+    const uint8x16_t vec_src_48 = vld1q_u8(src + 48);
+    const uint8x16_t vec_ref_00 = vld1q_u8(ref);
+    const uint8x16_t vec_ref_16 = vld1q_u8(ref + 16);
+    const uint8x16_t vec_ref_32 = vld1q_u8(ref + 32);
+    const uint8x16_t vec_ref_48 = vld1q_u8(ref + 48);
+    src += src_stride;
+    ref += ref_stride;
+    vec_accum_lo = vabal_u8(vec_accum_lo, vget_low_u8(vec_src_00),
+                            vget_low_u8(vec_ref_00));
+    vec_accum_hi = vabal_u8(vec_accum_hi, vget_high_u8(vec_src_00),
+                            vget_high_u8(vec_ref_00));
+    vec_accum_lo = vabal_u8(vec_accum_lo, vget_low_u8(vec_src_16),
+                            vget_low_u8(vec_ref_16));
+    vec_accum_hi = vabal_u8(vec_accum_hi, vget_high_u8(vec_src_16),
+                            vget_high_u8(vec_ref_16));
+    vec_accum_lo = vabal_u8(vec_accum_lo, vget_low_u8(vec_src_32),
+                            vget_low_u8(vec_ref_32));
+    vec_accum_hi = vabal_u8(vec_accum_hi, vget_high_u8(vec_src_32),
+                            vget_high_u8(vec_ref_32));
+    vec_accum_lo = vabal_u8(vec_accum_lo, vget_low_u8(vec_src_48),
+                            vget_low_u8(vec_ref_48));
+    vec_accum_hi = vabal_u8(vec_accum_hi, vget_high_u8(vec_src_48),
+                            vget_high_u8(vec_ref_48));
+  }
+  return horizontal_long_add_16x8(vec_accum_lo, vec_accum_hi);
+}
+
+unsigned int aom_sad32x32_neon(const uint8_t *src, int src_stride,
+                               const uint8_t *ref, int ref_stride) {
+  int i;
+  uint16x8_t vec_accum_lo = vdupq_n_u16(0);
+  uint16x8_t vec_accum_hi = vdupq_n_u16(0);
+
+  for (i = 0; i < 32; ++i) {
+    const uint8x16_t vec_src_00 = vld1q_u8(src);
+    const uint8x16_t vec_src_16 = vld1q_u8(src + 16);
+    const uint8x16_t vec_ref_00 = vld1q_u8(ref);
+    const uint8x16_t vec_ref_16 = vld1q_u8(ref + 16);
+    src += src_stride;
+    ref += ref_stride;
+    vec_accum_lo = vabal_u8(vec_accum_lo, vget_low_u8(vec_src_00),
+                            vget_low_u8(vec_ref_00));
+    vec_accum_hi = vabal_u8(vec_accum_hi, vget_high_u8(vec_src_00),
+                            vget_high_u8(vec_ref_00));
+    vec_accum_lo = vabal_u8(vec_accum_lo, vget_low_u8(vec_src_16),
+                            vget_low_u8(vec_ref_16));
+    vec_accum_hi = vabal_u8(vec_accum_hi, vget_high_u8(vec_src_16),
+                            vget_high_u8(vec_ref_16));
+  }
+  return horizontal_add_16x8(vaddq_u16(vec_accum_lo, vec_accum_hi));
+}
+
+unsigned int aom_sad16x16_neon(const uint8_t *src, int src_stride,
+                               const uint8_t *ref, int ref_stride) {
+  int i;
+  uint16x8_t vec_accum_lo = vdupq_n_u16(0);
+  uint16x8_t vec_accum_hi = vdupq_n_u16(0);
+
+  for (i = 0; i < 16; ++i) {
+    const uint8x16_t vec_src = vld1q_u8(src);
+    const uint8x16_t vec_ref = vld1q_u8(ref);
+    src += src_stride;
+    ref += ref_stride;
+    vec_accum_lo =
+        vabal_u8(vec_accum_lo, vget_low_u8(vec_src), vget_low_u8(vec_ref));
+    vec_accum_hi =
+        vabal_u8(vec_accum_hi, vget_high_u8(vec_src), vget_high_u8(vec_ref));
+  }
+  return horizontal_add_16x8(vaddq_u16(vec_accum_lo, vec_accum_hi));
+}
+
+unsigned int aom_sad8x8_neon(const uint8_t *src, int src_stride,
+                             const uint8_t *ref, int ref_stride) {
+  int i;
+  uint16x8_t vec_accum = vdupq_n_u16(0);
+
+  for (i = 0; i < 8; ++i) {
+    const uint8x8_t vec_src = vld1_u8(src);
+    const uint8x8_t vec_ref = vld1_u8(ref);
+    src += src_stride;
+    ref += ref_stride;
+    vec_accum = vabal_u8(vec_accum, vec_src, vec_ref);
+  }
+  return horizontal_add_16x8(vec_accum);
+}