test/boolcoder_test.cc

   1 /*
   2  *  Copyright (c) 2012 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 <math.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14
  15 #include "third_party/googletest/src/include/gtest/gtest.h"
  16
  17 extern "C" {
  18 #include "vp8/encoder/boolhuff.h"
  19 #include "vp8/decoder/dboolhuff.h"
  20 }
  21
  22 #include "acm_random.h"
  23 #include "vpx/vpx_integer.h"
  24
  25 using libvpx_test::ACMRandom;
  26
  27 namespace {
  28 const int num_tests = 10;
  29 }  // namespace
  30
  31 TEST(VP8, TestBitIO) {
  32   ACMRandom rnd(ACMRandom::DeterministicSeed());
  33   for (int n = 0; n < num_tests; ++n) {
  34     for (int method = 0; method <= 7; ++method) {   // we generate various proba
  35       const int bits_to_test = 1000;
  36       uint8_t probas[bits_to_test];
  37
  38       for (int i = 0; i < bits_to_test; ++i) {
  39         const int parity = i & 1;
  40         probas[i] =
  41           (method == 0) ? 0 : (method == 1) ? 255 :
  42           (method == 2) ? 128 :
  43           (method == 3) ? rnd.Rand8() :
  44           (method == 4) ? (parity ? 0 : 255) :
  45             // alternate between low and high proba:
  46             (method == 5) ? (parity ? rnd(128) : 255 - rnd(128)) :
  47             (method == 6) ?
  48             (parity ? rnd(64) : 255 - rnd(64)) :
  49             (parity ? rnd(32) : 255 - rnd(32));
  50       }
  51       for (int bit_method = 0; bit_method <= 3; ++bit_method) {
  52         const int random_seed = 6432;
  53         const int buffer_size = 10000;
  54         ACMRandom bit_rnd(random_seed);
  55         BOOL_CODER bw;
  56         uint8_t bw_buffer[buffer_size];
  57         vp8_start_encode(&bw, bw_buffer);
  58
  59         int bit = (bit_method == 0) ? 0 : (bit_method == 1) ? 1 : 0;
  60         for (int i = 0; i < bits_to_test; ++i) {
  61           if (bit_method == 2) {
  62             bit = (i & 1);
  63           } else if (bit_method == 3) {
  64             bit = bit_rnd(2);
  65           }
  66           vp8_encode_bool(&bw, bit, static_cast<int>(probas[i]));
  67         }
  68
  69         vp8_stop_encode(&bw);
  70
  71         BOOL_DECODER br;
  72         vp8dx_start_decode(&br, bw_buffer, buffer_size);
  73         bit_rnd.Reset(random_seed);
  74         for (int i = 0; i < bits_to_test; ++i) {
  75           if (bit_method == 2) {
  76             bit = (i & 1);
  77           } else if (bit_method == 3) {
  78             bit = bit_rnd(2);
  79           }
  80           GTEST_ASSERT_EQ(vp8dx_decode_bool(&br, probas[i]), bit)
  81               << "pos: " << i << " / " << bits_to_test
  82               << " bit_method: " << bit_method
  83               << " method: " << method;
  84         }
  85       }
  86     }
  87   }
  88 }