1 files changed, 371 insertions, 0 deletions
diff --git a/media/libaom/src/test/av1_txfm_test.cc b/media/libaom/src/test/av1_txfm_test.cc
new file mode 100644
index 000000000..d5b0ce325
--- /dev/null
+++ b/media/libaom/src/test/av1_txfm_test.cc
@@ -0,0 +1,371 @@
+/*
+ * 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 <stdio.h>
+#include "test/av1_txfm_test.h"
+
+namespace libaom_test {
+
+int get_txfm1d_size(TX_SIZE tx_size) { return tx_size_wide[tx_size]; }
+
+void get_txfm1d_type(TX_TYPE txfm2d_type, TYPE_TXFM *type0, TYPE_TXFM *type1) {
+  switch (txfm2d_type) {
+    case DCT_DCT:
+      *type0 = TYPE_DCT;
+      *type1 = TYPE_DCT;
+      break;
+    case ADST_DCT:
+      *type0 = TYPE_ADST;
+      *type1 = TYPE_DCT;
+      break;
+    case DCT_ADST:
+      *type0 = TYPE_DCT;
+      *type1 = TYPE_ADST;
+      break;
+    case ADST_ADST:
+      *type0 = TYPE_ADST;
+      *type1 = TYPE_ADST;
+      break;
+    case FLIPADST_DCT:
+      *type0 = TYPE_ADST;
+      *type1 = TYPE_DCT;
+      break;
+    case DCT_FLIPADST:
+      *type0 = TYPE_DCT;
+      *type1 = TYPE_ADST;
+      break;
+    case FLIPADST_FLIPADST:
+      *type0 = TYPE_ADST;
+      *type1 = TYPE_ADST;
+      break;
+    case ADST_FLIPADST:
+      *type0 = TYPE_ADST;
+      *type1 = TYPE_ADST;
+      break;
+    case FLIPADST_ADST:
+      *type0 = TYPE_ADST;
+      *type1 = TYPE_ADST;
+      break;
+    case IDTX:
+      *type0 = TYPE_IDTX;
+      *type1 = TYPE_IDTX;
+      break;
+    case H_DCT:
+      *type0 = TYPE_IDTX;
+      *type1 = TYPE_DCT;
+      break;
+    case V_DCT:
+      *type0 = TYPE_DCT;
+      *type1 = TYPE_IDTX;
+      break;
+    case H_ADST:
+      *type0 = TYPE_IDTX;
+      *type1 = TYPE_ADST;
+      break;
+    case V_ADST:
+      *type0 = TYPE_ADST;
+      *type1 = TYPE_IDTX;
+      break;
+    case H_FLIPADST:
+      *type0 = TYPE_IDTX;
+      *type1 = TYPE_ADST;
+      break;
+    case V_FLIPADST:
+      *type0 = TYPE_ADST;
+      *type1 = TYPE_IDTX;
+      break;
+    default:
+      *type0 = TYPE_DCT;
+      *type1 = TYPE_DCT;
+      assert(0);
+      break;
+  }
+}
+
+double Sqrt2 = pow(2, 0.5);
+double invSqrt2 = 1 / pow(2, 0.5);
+
+double dct_matrix(double n, double k, int size) {
+  return cos(M_PI * (2 * n + 1) * k / (2 * size));
+}
+
+void reference_dct_1d(const double *in, double *out, int size) {
+  for (int k = 0; k < size; ++k) {
+    out[k] = 0;
+    for (int n = 0; n < size; ++n) {
+      out[k] += in[n] * dct_matrix(n, k, size);
+    }
+    if (k == 0) out[k] = out[k] * invSqrt2;
+  }
+}
+
+void reference_idct_1d(const double *in, double *out, int size) {
+  for (int k = 0; k < size; ++k) {
+    out[k] = 0;
+    for (int n = 0; n < size; ++n) {
+      if (n == 0)
+        out[k] += invSqrt2 * in[n] * dct_matrix(k, n, size);
+      else
+        out[k] += in[n] * dct_matrix(k, n, size);
+    }
+  }
+}
+
+// TODO(any): Copied from the old 'fadst4' (same as the new 'av1_fadst4_new'
+// function). Should be replaced by a proper reference function that takes
+// 'double' input & output.
+static void fadst4_new(const tran_low_t *input, tran_low_t *output) {
+  tran_high_t x0, x1, x2, x3;
+  tran_high_t s0, s1, s2, s3, s4, s5, s6, s7;
+
+  x0 = input[0];
+  x1 = input[1];
+  x2 = input[2];
+  x3 = input[3];
+
+  if (!(x0 | x1 | x2 | x3)) {
+    output[0] = output[1] = output[2] = output[3] = 0;
+    return;
+  }
+
+  s0 = sinpi_1_9 * x0;
+  s1 = sinpi_4_9 * x0;
+  s2 = sinpi_2_9 * x1;
+  s3 = sinpi_1_9 * x1;
+  s4 = sinpi_3_9 * x2;
+  s5 = sinpi_4_9 * x3;
+  s6 = sinpi_2_9 * x3;
+  s7 = x0 + x1 - x3;
+
+  x0 = s0 + s2 + s5;
+  x1 = sinpi_3_9 * s7;
+  x2 = s1 - s3 + s6;
+  x3 = s4;
+
+  s0 = x0 + x3;
+  s1 = x1;
+  s2 = x2 - x3;
+  s3 = x2 - x0 + x3;
+
+  // 1-D transform scaling factor is sqrt(2).
+  output[0] = (tran_low_t)fdct_round_shift(s0);
+  output[1] = (tran_low_t)fdct_round_shift(s1);
+  output[2] = (tran_low_t)fdct_round_shift(s2);
+  output[3] = (tran_low_t)fdct_round_shift(s3);
+}
+
+void reference_adst_1d(const double *in, double *out, int size) {
+  if (size == 4) {  // Special case.
+    tran_low_t int_input[4];
+    for (int i = 0; i < 4; ++i) {
+      int_input[i] = static_cast<tran_low_t>(round(in[i]));
+    }
+    tran_low_t int_output[4];
+    fadst4_new(int_input, int_output);
+    for (int i = 0; i < 4; ++i) {
+      out[i] = int_output[i];
+    }
+    return;
+  }
+
+  for (int k = 0; k < size; ++k) {
+    out[k] = 0;
+    for (int n = 0; n < size; ++n) {
+      out[k] += in[n] * sin(M_PI * (2 * n + 1) * (2 * k + 1) / (4 * size));
+    }
+  }
+}
+
+void reference_idtx_1d(const double *in, double *out, int size) {
+  double scale = 0;
+  if (size == 4)
+    scale = Sqrt2;
+  else if (size == 8)
+    scale = 2;
+  else if (size == 16)
+    scale = 2 * Sqrt2;
+  else if (size == 32)
+    scale = 4;
+  else if (size == 64)
+    scale = 4 * Sqrt2;
+  for (int k = 0; k < size; ++k) {
+    out[k] = in[k] * scale;
+  }
+}
+
+void reference_hybrid_1d(double *in, double *out, int size, int type) {
+  if (type == TYPE_DCT)
+    reference_dct_1d(in, out, size);
+  else if (type == TYPE_ADST)
+    reference_adst_1d(in, out, size);
+  else
+    reference_idtx_1d(in, out, size);
+}
+
+double get_amplification_factor(TX_TYPE tx_type, TX_SIZE tx_size) {
+  TXFM_2D_FLIP_CFG fwd_txfm_flip_cfg;
+  av1_get_fwd_txfm_cfg(tx_type, tx_size, &fwd_txfm_flip_cfg);
+  const int tx_width = tx_size_wide[fwd_txfm_flip_cfg.tx_size];
+  const int tx_height = tx_size_high[fwd_txfm_flip_cfg.tx_size];
+  const int8_t *shift = fwd_txfm_flip_cfg.shift;
+  const int amplify_bit = shift[0] + shift[1] + shift[2];
+  double amplify_factor =
+      amplify_bit >= 0 ? (1 << amplify_bit) : (1.0 / (1 << -amplify_bit));
+
+  // For rectangular transforms, we need to multiply by an extra factor.
+  const int rect_type = get_rect_tx_log_ratio(tx_width, tx_height);
+  if (abs(rect_type) == 1) {
+    amplify_factor *= pow(2, 0.5);
+  }
+  return amplify_factor;
+}
+
+void reference_hybrid_2d(double *in, double *out, TX_TYPE tx_type,
+                         TX_SIZE tx_size) {
+  // Get transform type and size of each dimension.
+  TYPE_TXFM type0;
+  TYPE_TXFM type1;
+  get_txfm1d_type(tx_type, &type0, &type1);
+  const int tx_width = tx_size_wide[tx_size];
+  const int tx_height = tx_size_high[tx_size];
+
+  double *const temp_in = new double[AOMMAX(tx_width, tx_height)];
+  double *const temp_out = new double[AOMMAX(tx_width, tx_height)];
+  double *const out_interm = new double[tx_width * tx_height];
+  const int stride = tx_width;
+
+  // Transform columns.
+  for (int c = 0; c < tx_width; ++c) {
+    for (int r = 0; r < tx_height; ++r) {
+      temp_in[r] = in[r * stride + c];
+    }
+    reference_hybrid_1d(temp_in, temp_out, tx_height, type0);
+    for (int r = 0; r < tx_height; ++r) {
+      out_interm[r * stride + c] = temp_out[r];
+    }
+  }
+
+  // Transform rows.
+  for (int r = 0; r < tx_height; ++r) {
+    reference_hybrid_1d(out_interm + r * stride, out + r * stride, tx_width,
+                        type1);
+  }
+
+  delete[] temp_in;
+  delete[] temp_out;
+  delete[] out_interm;
+
+  // These transforms use an approximate 2D DCT transform, by only keeping the
+  // top-left quarter of the coefficients, and repacking them in the first
+  // quarter indices.
+  // TODO(urvang): Refactor this code.
+  if (tx_width == 64 && tx_height == 64) {  // tx_size == TX_64X64
+    // Zero out top-right 32x32 area.
+    for (int row = 0; row < 32; ++row) {
+      memset(out + row * 64 + 32, 0, 32 * sizeof(*out));
+    }
+    // Zero out the bottom 64x32 area.
+    memset(out + 32 * 64, 0, 32 * 64 * sizeof(*out));
+    // Re-pack non-zero coeffs in the first 32x32 indices.
+    for (int row = 1; row < 32; ++row) {
+      memcpy(out + row * 32, out + row * 64, 32 * sizeof(*out));
+    }
+  } else if (tx_width == 32 && tx_height == 64) {  // tx_size == TX_32X64
+    // Zero out the bottom 32x32 area.
+    memset(out + 32 * 32, 0, 32 * 32 * sizeof(*out));
+    // Note: no repacking needed here.
+  } else if (tx_width == 64 && tx_height == 32) {  // tx_size == TX_64X32
+    // Zero out right 32x32 area.
+    for (int row = 0; row < 32; ++row) {
+      memset(out + row * 64 + 32, 0, 32 * sizeof(*out));
+    }
+    // Re-pack non-zero coeffs in the first 32x32 indices.
+    for (int row = 1; row < 32; ++row) {
+      memcpy(out + row * 32, out + row * 64, 32 * sizeof(*out));
+    }
+  } else if (tx_width == 16 && tx_height == 64) {  // tx_size == TX_16X64
+    // Zero out the bottom 16x32 area.
+    memset(out + 16 * 32, 0, 16 * 32 * sizeof(*out));
+    // Note: no repacking needed here.
+  } else if (tx_width == 64 && tx_height == 16) {  // tx_size == TX_64X16
+    // Zero out right 32x16 area.
+    for (int row = 0; row < 16; ++row) {
+      memset(out + row * 64 + 32, 0, 32 * sizeof(*out));
+    }
+    // Re-pack non-zero coeffs in the first 32x16 indices.
+    for (int row = 1; row < 16; ++row) {
+      memcpy(out + row * 32, out + row * 64, 32 * sizeof(*out));
+    }
+  }
+
+  // Apply appropriate scale.
+  const double amplify_factor = get_amplification_factor(tx_type, tx_size);
+  for (int c = 0; c < tx_width; ++c) {
+    for (int r = 0; r < tx_height; ++r) {
+      out[r * stride + c] *= amplify_factor;
+    }
+  }
+}
+
+template <typename Type>
+void fliplr(Type *dest, int width, int height, int stride) {
+  for (int r = 0; r < height; ++r) {
+    for (int c = 0; c < width / 2; ++c) {
+      const Type tmp = dest[r * stride + c];
+      dest[r * stride + c] = dest[r * stride + width - 1 - c];
+      dest[r * stride + width - 1 - c] = tmp;
+    }
+  }
+}
+
+template <typename Type>
+void flipud(Type *dest, int width, int height, int stride) {
+  for (int c = 0; c < width; ++c) {
+    for (int r = 0; r < height / 2; ++r) {
+      const Type tmp = dest[r * stride + c];
+      dest[r * stride + c] = dest[(height - 1 - r) * stride + c];
+      dest[(height - 1 - r) * stride + c] = tmp;
+    }
+  }
+}
+
+template <typename Type>
+void fliplrud(Type *dest, int width, int height, int stride) {
+  for (int r = 0; r < height / 2; ++r) {
+    for (int c = 0; c < width; ++c) {
+      const Type tmp = dest[r * stride + c];
+      dest[r * stride + c] = dest[(height - 1 - r) * stride + width - 1 - c];
+      dest[(height - 1 - r) * stride + width - 1 - c] = tmp;
+    }
+  }
+}
+
+template void fliplr<double>(double *dest, int width, int height, int stride);
+template void flipud<double>(double *dest, int width, int height, int stride);
+template void fliplrud<double>(double *dest, int width, int height, int stride);
+
+int bd_arr[BD_NUM] = { 8, 10, 12 };
+
+int8_t low_range_arr[BD_NUM] = { 18, 32, 32 };
+int8_t high_range_arr[BD_NUM] = { 32, 32, 32 };
+
+void txfm_stage_range_check(const int8_t *stage_range, int stage_num,
+                            int8_t cos_bit, int low_range, int high_range) {
+  for (int i = 0; i < stage_num; ++i) {
+    EXPECT_LE(stage_range[i], low_range);
+    ASSERT_LE(stage_range[i] + cos_bit, high_range) << "stage = " << i;
+  }
+  for (int i = 0; i < stage_num - 1; ++i) {
+    // make sure there is no overflow while doing half_btf()
+    ASSERT_LE(stage_range[i + 1] + cos_bit, high_range) << "stage = " << i;
+  }
+}
+}  // namespace libaom_test