1 files changed, 85 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx_dsp/arm/fdct4x4_neon.c b/media/libvpx/libvpx/vpx_dsp/arm/fdct4x4_neon.c
new file mode 100644
index 0000000000..4bc968ecba
--- /dev/null
+++ b/media/libvpx/libvpx/vpx_dsp/arm/fdct4x4_neon.c
@@ -0,0 +1,85 @@
+/*
+ *  Copyright (c) 2017 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 <arm_neon.h>
+
+#include "./vpx_config.h"
+#include "./vpx_dsp_rtcd.h"
+#include "vpx_dsp/txfm_common.h"
+#include "vpx_dsp/vpx_dsp_common.h"
+#include "vpx_dsp/arm/idct_neon.h"
+#include "vpx_dsp/arm/fdct_neon.h"
+#include "vpx_dsp/arm/mem_neon.h"
+#include "vpx_dsp/arm/transpose_neon.h"
+#include "vpx_dsp/arm/fdct4x4_neon.h"
+
+void vpx_fdct4x4_neon(const int16_t *input, tran_low_t *final_output,
+                      int stride) {
+  // input[M * stride] * 16
+  int16x4_t in[4];
+  in[0] = vshl_n_s16(vld1_s16(input + 0 * stride), 4);
+  in[1] = vshl_n_s16(vld1_s16(input + 1 * stride), 4);
+  in[2] = vshl_n_s16(vld1_s16(input + 2 * stride), 4);
+  in[3] = vshl_n_s16(vld1_s16(input + 3 * stride), 4);
+
+  // If the very first value != 0, then add 1.
+  if (input[0] != 0) {
+    const int16x4_t one = vreinterpret_s16_s64(vdup_n_s64(1));
+    in[0] = vadd_s16(in[0], one);
+  }
+  vpx_fdct4x4_pass1_neon(in);
+  vpx_fdct4x4_pass2_neon(in);
+  {
+    // Not quite a rounding shift. Only add 1 despite shifting by 2.
+    const int16x8_t one = vdupq_n_s16(1);
+    int16x8_t out_01 = vcombine_s16(in[0], in[1]);
+    int16x8_t out_23 = vcombine_s16(in[2], in[3]);
+    out_01 = vshrq_n_s16(vaddq_s16(out_01, one), 2);
+    out_23 = vshrq_n_s16(vaddq_s16(out_23, one), 2);
+    store_s16q_to_tran_low(final_output + 0 * 8, out_01);
+    store_s16q_to_tran_low(final_output + 1 * 8, out_23);
+  }
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+
+void vpx_highbd_fdct4x4_neon(const int16_t *input, tran_low_t *final_output,
+                             int stride) {
+  const int32x4_t const_one = vdupq_n_s32(1);
+
+  // input[M * stride] * 16
+  int32x4_t in[4];
+  in[0] = vshll_n_s16(vld1_s16(input + 0 * stride), 4);
+  in[1] = vshll_n_s16(vld1_s16(input + 1 * stride), 4);
+  in[2] = vshll_n_s16(vld1_s16(input + 2 * stride), 4);
+  in[3] = vshll_n_s16(vld1_s16(input + 3 * stride), 4);
+
+  // If the very first value != 0, then add 1.
+  if (input[0] != 0) {
+    static const int32_t k1000[4] = { 1, 0, 0, 0 };
+    in[0] = vaddq_s32(in[0], vld1q_s32(k1000));
+  }
+
+  vpx_highbd_fdct4x4_pass1_neon(in);
+  vpx_highbd_fdct4x4_pass1_neon(in);
+  {
+    // Not quite a rounding shift. Only add 1 despite shifting by 2.
+    in[0] = vshrq_n_s32(vaddq_s32(in[0], const_one), 2);
+    in[1] = vshrq_n_s32(vaddq_s32(in[1], const_one), 2);
+    in[2] = vshrq_n_s32(vaddq_s32(in[2], const_one), 2);
+    in[3] = vshrq_n_s32(vaddq_s32(in[3], const_one), 2);
+
+    vst1q_s32(final_output, in[0]);
+    vst1q_s32(final_output + 4, in[1]);
+    vst1q_s32(final_output + 8, in[2]);
+    vst1q_s32(final_output + 12, in[3]);
+  }
+}
+#endif  // CONFIG_VP9_HIGHBITDEPTH