/* *  Copyright (c) 2012 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 <math.h>#include <stdlib.h>#include <string.h>#include <tuple> #include "third_party/googletest/src/include/gtest/gtest.h" #include "./vp9_rtcd.h"#include "./vpx_dsp_rtcd.h"#include "test/acm_random.h"#include "test/clear_system_state.h"#include "test/register_state_check.h"#include "test/util.h"#include "vp9/common/vp9_entropy.h"#include "vp9/common/vp9_scan.h"#include "vpx/vpx_codec.h"#include "vpx/vpx_integer.h"#include "vpx_ports/mem.h" using libvpx_test::ACMRandom; namespace { const int kNumCoeffs = 64;const double kPi = 3.141592653589793238462643383279502884; const int kSignBiasMaxDiff255 = 1500;const int kSignBiasMaxDiff15 = 10000; typedef void (*FdctFunc)(const int16_t *in, tran_low_t *out, int stride);typedef void (*IdctFunc)(const tran_low_t *in, uint8_t *out, int stride);typedef void (*FhtFunc)(const int16_t *in, tran_low_t *out, int stride,                        int tx_type);typedef void (*IhtFunc)(const tran_low_t *in, uint8_t *out, int stride,                        int tx_type); typedef std::tuple<FdctFunc, IdctFunc, int, vpx_bit_depth_t> Dct8x8Param;typedef std::tuple<FhtFunc, IhtFunc, int, vpx_bit_depth_t> Ht8x8Param;typedef std::tuple<IdctFunc, IdctFunc, int, vpx_bit_depth_t> Idct8x8Param; void reference_8x8_dct_1d(const double in[8], double out[8]) {  const double kInvSqrt2 = 0.707106781186547524400844362104;  for (int k = 0; k < 8; k++) {    out[k] = 0.0;    for (int n = 0; n < 8; n++) {      out[k] += in[n] * cos(kPi * (2 * n + 1) * k / 16.0);    }    if (k == 0) out[k] = out[k] * kInvSqrt2;  }} void reference_8x8_dct_2d(const int16_t input[kNumCoeffs],                          double output[kNumCoeffs]) {  // First transform columns  for (int i = 0; i < 8; ++i) {    double temp_in[8], temp_out[8];    for (int j = 0; j < 8; ++j) temp_in[j] = input[j * 8 + i];    reference_8x8_dct_1d(temp_in, temp_out);    for (int j = 0; j < 8; ++j) output[j * 8 + i] = temp_out[j];  }  // Then transform rows  for (int i = 0; i < 8; ++i) {    double temp_in[8], temp_out[8];    for (int j = 0; j < 8; ++j) temp_in[j] = output[j + i * 8];    reference_8x8_dct_1d(temp_in, temp_out);    // Scale by some magic number    for (int j = 0; j < 8; ++j) output[j + i * 8] = temp_out[j] * 2;  }} void fdct8x8_ref(const int16_t *in, tran_low_t *out, int stride,                 int /*tx_type*/) {  vpx_fdct8x8_c(in, out, stride);} void fht8x8_ref(const int16_t *in, tran_low_t *out, int stride, int tx_type) {  vp9_fht8x8_c(in, out, stride, tx_type);} #if CONFIG_VP9_HIGHBITDEPTHvoid idct8x8_10(const tran_low_t *in, uint8_t *out, int stride) {  vpx_highbd_idct8x8_64_add_c(in, CAST_TO_SHORTPTR(out), stride, 10);} void idct8x8_12(const tran_low_t *in, uint8_t *out, int stride) {  vpx_highbd_idct8x8_64_add_c(in, CAST_TO_SHORTPTR(out), stride, 12);} void iht8x8_10(const tran_low_t *in, uint8_t *out, int stride, int tx_type) {  vp9_highbd_iht8x8_64_add_c(in, CAST_TO_SHORTPTR(out), stride, tx_type, 10);} void iht8x8_12(const tran_low_t *in, uint8_t *out, int stride, int tx_type) {  vp9_highbd_iht8x8_64_add_c(in, CAST_TO_SHORTPTR(out), stride, tx_type, 12);} #if HAVE_SSE2 void idct8x8_12_add_10_c(const tran_low_t *in, uint8_t *out, int stride) {  vpx_highbd_idct8x8_12_add_c(in, CAST_TO_SHORTPTR(out), stride, 10);} void idct8x8_12_add_12_c(const tran_low_t *in, uint8_t *out, int stride) {  vpx_highbd_idct8x8_12_add_c(in, CAST_TO_SHORTPTR(out), stride, 12);} void idct8x8_12_add_10_sse2(const tran_low_t *in, uint8_t *out, int stride) {  vpx_highbd_idct8x8_12_add_sse2(in, CAST_TO_SHORTPTR(out), stride, 10);} void idct8x8_12_add_12_sse2(const tran_low_t *in, uint8_t *out, int stride) {  vpx_highbd_idct8x8_12_add_sse2(in, CAST_TO_SHORTPTR(out), stride, 12);} void idct8x8_64_add_10_sse2(const tran_low_t *in, uint8_t *out, int stride) {  vpx_highbd_idct8x8_64_add_sse2(in, CAST_TO_SHORTPTR(out), stride, 10);} void idct8x8_64_add_12_sse2(const tran_low_t *in, uint8_t *out, int stride) {  vpx_highbd_idct8x8_64_add_sse2(in, CAST_TO_SHORTPTR(out), stride, 12);}#endif  // HAVE_SSE2#endif  // CONFIG_VP9_HIGHBITDEPTH class FwdTrans8x8TestBase { public:  virtual ~FwdTrans8x8TestBase() {}  protected:  virtual void RunFwdTxfm(int16_t *in, tran_low_t *out, int stride) = 0;  virtual void RunInvTxfm(tran_low_t *out, uint8_t *dst, int stride) = 0;   void RunSignBiasCheck() {    ACMRandom rnd(ACMRandom::DeterministicSeed());    DECLARE_ALIGNED(16, int16_t, test_input_block[64]);    DECLARE_ALIGNED(16, tran_low_t, test_output_block[64]);    int count_sign_block[64][2];    const int count_test_block = 100000;     memset(count_sign_block, 0, sizeof(count_sign_block));     for (int i = 0; i < count_test_block; ++i) {      // Initialize a test block with input range [-255, 255].      for (int j = 0; j < 64; ++j) {        test_input_block[j] = ((rnd.Rand16() >> (16 - bit_depth_)) & mask_) -                              ((rnd.Rand16() >> (16 - bit_depth_)) & mask_);      }      ASM_REGISTER_STATE_CHECK(          RunFwdTxfm(test_input_block, test_output_block, pitch_));       for (int j = 0; j < 64; ++j) {        if (test_output_block[j] < 0) {          ++count_sign_block[j][0];        } else if (test_output_block[j] > 0) {          ++count_sign_block[j][1];        }      }    }     for (int j = 0; j < 64; ++j) {      const int diff = abs(count_sign_block[j][0] - count_sign_block[j][1]);      const int max_diff = kSignBiasMaxDiff255;      EXPECT_LT(diff, max_diff << (bit_depth_ - 8))          << "Error: 8x8 FDCT/FHT has a sign bias > "          << 1. * max_diff / count_test_block * 100 << "%"          << " for input range [-255, 255] at index " << j          << " count0: " << count_sign_block[j][0]          << " count1: " << count_sign_block[j][1] << " diff: " << diff;    }     memset(count_sign_block, 0, sizeof(count_sign_block));     for (int i = 0; i < count_test_block; ++i) {      // Initialize a test block with input range [-mask_ / 16, mask_ / 16].      for (int j = 0; j < 64; ++j) {        test_input_block[j] =            ((rnd.Rand16() & mask_) >> 4) - ((rnd.Rand16() & mask_) >> 4);      }      ASM_REGISTER_STATE_CHECK(          RunFwdTxfm(test_input_block, test_output_block, pitch_));       for (int j = 0; j < 64; ++j) {        if (test_output_block[j] < 0) {          ++count_sign_block[j][0];        } else if (test_output_block[j] > 0) {          ++count_sign_block[j][1];        }      }    }     for (int j = 0; j < 64; ++j) {      const int diff = abs(count_sign_block[j][0] - count_sign_block[j][1]);      const int max_diff = kSignBiasMaxDiff15;      EXPECT_LT(diff, max_diff << (bit_depth_ - 8))          << "Error: 8x8 FDCT/FHT has a sign bias > "          << 1. * max_diff / count_test_block * 100 << "%"          << " for input range [-15, 15] at index " << j          << " count0: " << count_sign_block[j][0]          << " count1: " << count_sign_block[j][1] << " diff: " << diff;    }  }   void RunRoundTripErrorCheck() {    ACMRandom rnd(ACMRandom::DeterministicSeed());    int max_error = 0;    int total_error = 0;    const int count_test_block = 100000;    DECLARE_ALIGNED(16, int16_t, test_input_block[64]);    DECLARE_ALIGNED(16, tran_low_t, test_temp_block[64]);    DECLARE_ALIGNED(16, uint8_t, dst[64]);    DECLARE_ALIGNED(16, uint8_t, src[64]);#if CONFIG_VP9_HIGHBITDEPTH    DECLARE_ALIGNED(16, uint16_t, dst16[64]);    DECLARE_ALIGNED(16, uint16_t, src16[64]);#endif     for (int i = 0; i < count_test_block; ++i) {      // Initialize a test block with input range [-mask_, mask_].      for (int j = 0; j < 64; ++j) {        if (bit_depth_ == VPX_BITS_8) {          src[j] = rnd.Rand8();          dst[j] = rnd.Rand8();          test_input_block[j] = src[j] - dst[j];#if CONFIG_VP9_HIGHBITDEPTH        } else {          src16[j] = rnd.Rand16() & mask_;          dst16[j] = rnd.Rand16() & mask_;          test_input_block[j] = src16[j] - dst16[j];#endif        }      }       ASM_REGISTER_STATE_CHECK(          RunFwdTxfm(test_input_block, test_temp_block, pitch_));      for (int j = 0; j < 64; ++j) {        if (test_temp_block[j] > 0) {          test_temp_block[j] += 2;          test_temp_block[j] /= 4;          test_temp_block[j] *= 4;        } else {          test_temp_block[j] -= 2;          test_temp_block[j] /= 4;          test_temp_block[j] *= 4;        }      }      if (bit_depth_ == VPX_BITS_8) {        ASM_REGISTER_STATE_CHECK(RunInvTxfm(test_temp_block, dst, pitch_));#if CONFIG_VP9_HIGHBITDEPTH      } else {        ASM_REGISTER_STATE_CHECK(            RunInvTxfm(test_temp_block, CAST_TO_BYTEPTR(dst16), pitch_));#endif      }       for (int j = 0; j < 64; ++j) {#if CONFIG_VP9_HIGHBITDEPTH        const int diff =            bit_depth_ == VPX_BITS_8 ? dst[j] - src[j] : dst16[j] - src16[j];#else        const int diff = dst[j] - src[j];#endif        const int error = diff * diff;        if (max_error < error) max_error = error;        total_error += error;      }    }     EXPECT_GE(1 << 2 * (bit_depth_ - 8), max_error)        << "Error: 8x8 FDCT/IDCT or FHT/IHT has an individual"        << " roundtrip error > 1";     EXPECT_GE((count_test_block << 2 * (bit_depth_ - 8)) / 5, total_error)        << "Error: 8x8 FDCT/IDCT or FHT/IHT has average roundtrip "        << "error > 1/5 per block";  }   void RunExtremalCheck() {    ACMRandom rnd(ACMRandom::DeterministicSeed());    int max_error = 0;    int total_error = 0;    int total_coeff_error = 0;    const int count_test_block = 100000;    DECLARE_ALIGNED(16, int16_t, test_input_block[64]);    DECLARE_ALIGNED(16, tran_low_t, test_temp_block[64]);    DECLARE_ALIGNED(16, tran_low_t, ref_temp_block[64]);    DECLARE_ALIGNED(16, uint8_t, dst[64]);    DECLARE_ALIGNED(16, uint8_t, src[64]);#if CONFIG_VP9_HIGHBITDEPTH    DECLARE_ALIGNED(16, uint16_t, dst16[64]);    DECLARE_ALIGNED(16, uint16_t, src16[64]);#endif     for (int i = 0; i < count_test_block; ++i) {      // Initialize a test block with input range [-mask_, mask_].      for (int j = 0; j < 64; ++j) {        if (bit_depth_ == VPX_BITS_8) {          if (i == 0) {            src[j] = 255;            dst[j] = 0;          } else if (i == 1) {            src[j] = 0;            dst[j] = 255;          } else {            src[j] = rnd.Rand8() % 2 ? 255 : 0;            dst[j] = rnd.Rand8() % 2 ? 255 : 0;          }          test_input_block[j] = src[j] - dst[j];#if CONFIG_VP9_HIGHBITDEPTH        } else {          if (i == 0) {            src16[j] = mask_;            dst16[j] = 0;          } else if (i == 1) {            src16[j] = 0;            dst16[j] = mask_;          } else {            src16[j] = rnd.Rand8() % 2 ? mask_ : 0;            dst16[j] = rnd.Rand8() % 2 ? mask_ : 0;          }          test_input_block[j] = src16[j] - dst16[j];#endif        }      }       ASM_REGISTER_STATE_CHECK(          RunFwdTxfm(test_input_block, test_temp_block, pitch_));      ASM_REGISTER_STATE_CHECK(          fwd_txfm_ref(test_input_block, ref_temp_block, pitch_, tx_type_));      if (bit_depth_ == VPX_BITS_8) {        ASM_REGISTER_STATE_CHECK(RunInvTxfm(test_temp_block, dst, pitch_));#if CONFIG_VP9_HIGHBITDEPTH      } else {        ASM_REGISTER_STATE_CHECK(            RunInvTxfm(test_temp_block, CAST_TO_BYTEPTR(dst16), pitch_));#endif      }       for (int j = 0; j < 64; ++j) {#if CONFIG_VP9_HIGHBITDEPTH        const int diff =            bit_depth_ == VPX_BITS_8 ? dst[j] - src[j] : dst16[j] - src16[j];#else        const int diff = dst[j] - src[j];#endif        const int error = diff * diff;        if (max_error < error) max_error = error;        total_error += error;         const int coeff_diff = test_temp_block[j] - ref_temp_block[j];        total_coeff_error += abs(coeff_diff);      }       EXPECT_GE(1 << 2 * (bit_depth_ - 8), max_error)          << "Error: Extremal 8x8 FDCT/IDCT or FHT/IHT has"          << "an individual roundtrip error > 1";       EXPECT_GE((count_test_block << 2 * (bit_depth_ - 8)) / 5, total_error)          << "Error: Extremal 8x8 FDCT/IDCT or FHT/IHT has average"          << " roundtrip error > 1/5 per block";       EXPECT_EQ(0, total_coeff_error)          << "Error: Extremal 8x8 FDCT/FHT has"          << "overflow issues in the intermediate steps > 1";    }  }   void RunInvAccuracyCheck() {    ACMRandom rnd(ACMRandom::DeterministicSeed());    const int count_test_block = 1000;    DECLARE_ALIGNED(16, int16_t, in[kNumCoeffs]);    DECLARE_ALIGNED(16, tran_low_t, coeff[kNumCoeffs]);    DECLARE_ALIGNED(16, uint8_t, dst[kNumCoeffs]);    DECLARE_ALIGNED(16, uint8_t, src[kNumCoeffs]);#if CONFIG_VP9_HIGHBITDEPTH    DECLARE_ALIGNED(16, uint16_t, src16[kNumCoeffs]);    DECLARE_ALIGNED(16, uint16_t, dst16[kNumCoeffs]);#endif     for (int i = 0; i < count_test_block; ++i) {      double out_r[kNumCoeffs];       // Initialize a test block with input range [-255, 255].      for (int j = 0; j < kNumCoeffs; ++j) {        if (bit_depth_ == VPX_BITS_8) {          src[j] = rnd.Rand8() % 2 ? 255 : 0;          dst[j] = src[j] > 0 ? 0 : 255;          in[j] = src[j] - dst[j];#if CONFIG_VP9_HIGHBITDEPTH        } else {          src16[j] = rnd.Rand8() % 2 ? mask_ : 0;          dst16[j] = src16[j] > 0 ? 0 : mask_;          in[j] = src16[j] - dst16[j];#endif        }      }       reference_8x8_dct_2d(in, out_r);      for (int j = 0; j < kNumCoeffs; ++j) {        coeff[j] = static_cast<tran_low_t>(round(out_r[j]));      }       if (bit_depth_ == VPX_BITS_8) {        ASM_REGISTER_STATE_CHECK(RunInvTxfm(coeff, dst, pitch_));#if CONFIG_VP9_HIGHBITDEPTH      } else {        ASM_REGISTER_STATE_CHECK(            RunInvTxfm(coeff, CAST_TO_BYTEPTR(dst16), pitch_));#endif      }       for (int j = 0; j < kNumCoeffs; ++j) {#if CONFIG_VP9_HIGHBITDEPTH        const int diff =            bit_depth_ == VPX_BITS_8 ? dst[j] - src[j] : dst16[j] - src16[j];#else        const int diff = dst[j] - src[j];#endif        const uint32_t error = diff * diff;        EXPECT_GE(1u << 2 * (bit_depth_ - 8), error)            << "Error: 8x8 IDCT has error " << error << " at index " << j;      }    }  }   void RunFwdAccuracyCheck() {    ACMRandom rnd(ACMRandom::DeterministicSeed());    const int count_test_block = 1000;    DECLARE_ALIGNED(16, int16_t, in[kNumCoeffs]);    DECLARE_ALIGNED(16, tran_low_t, coeff_r[kNumCoeffs]);    DECLARE_ALIGNED(16, tran_low_t, coeff[kNumCoeffs]);     for (int i = 0; i < count_test_block; ++i) {      double out_r[kNumCoeffs];       // Initialize a test block with input range [-mask_, mask_].      for (int j = 0; j < kNumCoeffs; ++j) {        in[j] = rnd.Rand8() % 2 == 0 ? mask_ : -mask_;      }       RunFwdTxfm(in, coeff, pitch_);      reference_8x8_dct_2d(in, out_r);      for (int j = 0; j < kNumCoeffs; ++j) {        coeff_r[j] = static_cast<tran_low_t>(round(out_r[j]));      }       for (int j = 0; j < kNumCoeffs; ++j) {        const int32_t diff = coeff[j] - coeff_r[j];        const uint32_t error = diff * diff;        EXPECT_GE(9u << 2 * (bit_depth_ - 8), error)            << "Error: 8x8 DCT has error " << error << " at index " << j;      }    }  }   void CompareInvReference(IdctFunc ref_txfm, int thresh) {    ACMRandom rnd(ACMRandom::DeterministicSeed());    const int count_test_block = 10000;    const int eob = 12;    DECLARE_ALIGNED(16, tran_low_t, coeff[kNumCoeffs]);    DECLARE_ALIGNED(16, uint8_t, dst[kNumCoeffs]);    DECLARE_ALIGNED(16, uint8_t, ref[kNumCoeffs]);#if CONFIG_VP9_HIGHBITDEPTH    DECLARE_ALIGNED(16, uint16_t, dst16[kNumCoeffs]);    DECLARE_ALIGNED(16, uint16_t, ref16[kNumCoeffs]);#endif    const int16_t *scan = vp9_default_scan_orders[TX_8X8].scan;     for (int i = 0; i < count_test_block; ++i) {      for (int j = 0; j < kNumCoeffs; ++j) {        if (j < eob) {          // Random values less than the threshold, either positive or negative          coeff[scan[j]] = rnd(thresh) * (1 - 2 * (i % 2));        } else {          coeff[scan[j]] = 0;        }        if (bit_depth_ == VPX_BITS_8) {          dst[j] = 0;          ref[j] = 0;#if CONFIG_VP9_HIGHBITDEPTH        } else {          dst16[j] = 0;          ref16[j] = 0;#endif        }      }      if (bit_depth_ == VPX_BITS_8) {        ref_txfm(coeff, ref, pitch_);        ASM_REGISTER_STATE_CHECK(RunInvTxfm(coeff, dst, pitch_));#if CONFIG_VP9_HIGHBITDEPTH      } else {

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