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Diffstat (limited to '')
-rw-r--r-- | media/libvpx/libvpx/test/vp9_boolcoder_test.cc | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/test/vp9_boolcoder_test.cc b/media/libvpx/libvpx/test/vp9_boolcoder_test.cc new file mode 100644 index 0000000000..6ba171a000 --- /dev/null +++ b/media/libvpx/libvpx/test/vp9_boolcoder_test.cc @@ -0,0 +1,92 @@ +/* + * 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; + /* clang-format off */ + 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)); + /* clang-format on */ + } + 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); + // vpx_reader_fill() may read into uninitialized data that + // isn't used meaningfully, but may trigger an MSan warning. + memset(bw_buffer + bw.pos, 0, sizeof(BD_VALUE) - 1); + + // First bit should be zero + GTEST_ASSERT_EQ(bw_buffer[0] & 0x80, 0); + + vpx_reader br; + vpx_reader_init(&br, bw_buffer, kBufferSize, nullptr, nullptr); + 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; + } + } + } + } +} |