ref: b229710811f618247f712e4567b8949ec696ce0b
dir: /test/vp9_boolcoder_test.cc/
/* * 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 "third_party/googletest/src/include/gtest/gtest.h" #include "test/acm_random.h" #include "vpx/vpx_integer.h" #include "vpx_dsp/bitreader.h" #include "vpx_dsp/bitwriter.h" using libvpx_test::ACMRandom; namespace { const int num_tests = 10; } // namespace TEST(VP9, TestBitIO) { ACMRandom rnd(ACMRandom::DeterministicSeed()); for (int n = 0; n < num_tests; ++n) { for (int method = 0; method <= 7; ++method) { // we generate various proba const int kBitsToTest = 1000; uint8_t probas[kBitsToTest]; for (int i = 0; i < kBitsToTest; ++i) { const int parity = i & 1; probas[i] = (method == 0) ? 0 : (method == 1) ? 255 : (method == 2) ? 128 : (method == 3) ? rnd.Rand8() : (method == 4) ? (parity ? 0 : 255) : // alternate between low and high proba: (method == 5) ? (parity ? rnd(128) : 255 - rnd(128)) : (method == 6) ? (parity ? rnd(64) : 255 - rnd(64)) : (parity ? rnd(32) : 255 - rnd(32)); } for (int bit_method = 0; bit_method <= 3; ++bit_method) { const int random_seed = 6432; const int kBufferSize = 10000; ACMRandom bit_rnd(random_seed); vpx_writer bw; uint8_t bw_buffer[kBufferSize]; vpx_start_encode(&bw, bw_buffer); int bit = (bit_method == 0) ? 0 : (bit_method == 1) ? 1 : 0; for (int i = 0; i < kBitsToTest; ++i) { if (bit_method == 2) { bit = (i & 1); } else if (bit_method == 3) { bit = bit_rnd(2); } vpx_write(&bw, bit, static_cast<int>(probas[i])); } vpx_stop_encode(&bw); // First bit should be zero GTEST_ASSERT_EQ(bw_buffer[0] & 0x80, 0); vpx_reader br; vpx_reader_init(&br, bw_buffer, kBufferSize, NULL, NULL); bit_rnd.Reset(random_seed); for (int i = 0; i < kBitsToTest; ++i) { if (bit_method == 2) { bit = (i & 1); } else if (bit_method == 3) { bit = bit_rnd(2); } GTEST_ASSERT_EQ(vpx_read(&br, probas[i]), bit) << "pos: " << i << " / " << kBitsToTest << " bit_method: " << bit_method << " method: " << method; } } } } }