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      1 /*
      2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #include "./vpx_config.h"
     12 #include "./vp8_rtcd.h"
     13 #include "test/clear_system_state.h"
     14 #include "test/register_state_check.h"
     15 #include "third_party/googletest/src/include/gtest/gtest.h"
     16 
     17 #include "vpx/vpx_integer.h"
     18 
     19 typedef void (*idct_fn_t)(int16_t *input, unsigned char *pred_ptr,
     20                           int pred_stride, unsigned char *dst_ptr,
     21                           int dst_stride);
     22 namespace {
     23 class IDCTTest : public ::testing::TestWithParam<idct_fn_t> {
     24  protected:
     25   virtual void SetUp() {
     26     int i;
     27 
     28     UUT = GetParam();
     29     memset(input, 0, sizeof(input));
     30     /* Set up guard blocks */
     31     for (i = 0; i < 256; i++) output[i] = ((i & 0xF) < 4 && (i < 64)) ? 0 : -1;
     32   }
     33 
     34   virtual void TearDown() { libvpx_test::ClearSystemState(); }
     35 
     36   idct_fn_t UUT;
     37   int16_t input[16];
     38   unsigned char output[256];
     39   unsigned char predict[256];
     40 };
     41 
     42 TEST_P(IDCTTest, TestGuardBlocks) {
     43   int i;
     44 
     45   for (i = 0; i < 256; i++)
     46     if ((i & 0xF) < 4 && i < 64)
     47       EXPECT_EQ(0, output[i]) << i;
     48     else
     49       EXPECT_EQ(255, output[i]);
     50 }
     51 
     52 TEST_P(IDCTTest, TestAllZeros) {
     53   int i;
     54 
     55   REGISTER_STATE_CHECK(UUT(input, output, 16, output, 16));
     56 
     57   for (i = 0; i < 256; i++)
     58     if ((i & 0xF) < 4 && i < 64)
     59       EXPECT_EQ(0, output[i]) << "i==" << i;
     60     else
     61       EXPECT_EQ(255, output[i]) << "i==" << i;
     62 }
     63 
     64 TEST_P(IDCTTest, TestAllOnes) {
     65   int i;
     66 
     67   input[0] = 4;
     68   REGISTER_STATE_CHECK(UUT(input, output, 16, output, 16));
     69 
     70   for (i = 0; i < 256; i++)
     71     if ((i & 0xF) < 4 && i < 64)
     72       EXPECT_EQ(1, output[i]) << "i==" << i;
     73     else
     74       EXPECT_EQ(255, output[i]) << "i==" << i;
     75 }
     76 
     77 TEST_P(IDCTTest, TestAddOne) {
     78   int i;
     79 
     80   for (i = 0; i < 256; i++) predict[i] = i;
     81   input[0] = 4;
     82   REGISTER_STATE_CHECK(UUT(input, predict, 16, output, 16));
     83 
     84   for (i = 0; i < 256; i++)
     85     if ((i & 0xF) < 4 && i < 64)
     86       EXPECT_EQ(i + 1, output[i]) << "i==" << i;
     87     else
     88       EXPECT_EQ(255, output[i]) << "i==" << i;
     89 }
     90 
     91 TEST_P(IDCTTest, TestWithData) {
     92   int i;
     93 
     94   for (i = 0; i < 16; i++) input[i] = i;
     95 
     96   REGISTER_STATE_CHECK(UUT(input, output, 16, output, 16));
     97 
     98   for (i = 0; i < 256; i++)
     99     if ((i & 0xF) > 3 || i > 63)
    100       EXPECT_EQ(255, output[i]) << "i==" << i;
    101     else if (i == 0)
    102       EXPECT_EQ(11, output[i]) << "i==" << i;
    103     else if (i == 34)
    104       EXPECT_EQ(1, output[i]) << "i==" << i;
    105     else if (i == 2 || i == 17 || i == 32)
    106       EXPECT_EQ(3, output[i]) << "i==" << i;
    107     else
    108       EXPECT_EQ(0, output[i]) << "i==" << i;
    109 }
    110 
    111 INSTANTIATE_TEST_CASE_P(C, IDCTTest, ::testing::Values(vp8_short_idct4x4llm_c));
    112 #if HAVE_MMX
    113 INSTANTIATE_TEST_CASE_P(MMX, IDCTTest,
    114                         ::testing::Values(vp8_short_idct4x4llm_mmx));
    115 #endif
    116 }
    117