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Diffstat (limited to '')
-rw-r--r-- | third_party/jpeg-xl/lib/jxl/entropy_coder_test.cc | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/third_party/jpeg-xl/lib/jxl/entropy_coder_test.cc b/third_party/jpeg-xl/lib/jxl/entropy_coder_test.cc new file mode 100644 index 0000000000..9dbeb137af --- /dev/null +++ b/third_party/jpeg-xl/lib/jxl/entropy_coder_test.cc @@ -0,0 +1,68 @@ +// Copyright (c) the JPEG XL 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. + +// TODO(deymo): Move these tests to dec_ans.h and common.h + +#include <stdint.h> + +#include "lib/jxl/base/random.h" +#include "lib/jxl/common.h" +#include "lib/jxl/dec_ans.h" +#include "lib/jxl/testing.h" + +namespace jxl { +namespace { + +TEST(EntropyCoderTest, PackUnpack) { + for (int32_t i = -31; i < 32; ++i) { + uint32_t packed = PackSigned(i); + EXPECT_LT(packed, 63u); + int32_t unpacked = UnpackSigned(packed); + EXPECT_EQ(i, unpacked); + } +} + +struct DummyBitReader { + uint32_t nbits, bits; + void Consume(uint32_t nbits) {} + uint32_t PeekBits(uint32_t n) { + EXPECT_EQ(n, nbits); + return bits; + } +}; + +void HybridUintRoundtrip(HybridUintConfig config, size_t limit = 1 << 24) { + Rng rng(0); + constexpr size_t kNumIntegers = 1 << 20; + std::vector<uint32_t> integers(kNumIntegers); + std::vector<uint32_t> token(kNumIntegers); + std::vector<uint32_t> nbits(kNumIntegers); + std::vector<uint32_t> bits(kNumIntegers); + for (size_t i = 0; i < kNumIntegers; i++) { + integers[i] = rng.UniformU(0, limit + 1); + config.Encode(integers[i], &token[i], &nbits[i], &bits[i]); + } + for (size_t i = 0; i < kNumIntegers; i++) { + DummyBitReader br{nbits[i], bits[i]}; + EXPECT_EQ(integers[i], + ANSSymbolReader::ReadHybridUintConfig(config, token[i], &br)); + } +} + +TEST(HybridUintTest, Test000) { + HybridUintRoundtrip(HybridUintConfig{0, 0, 0}); +} +TEST(HybridUintTest, Test411) { + HybridUintRoundtrip(HybridUintConfig{4, 1, 1}); +} +TEST(HybridUintTest, Test420) { + HybridUintRoundtrip(HybridUintConfig{4, 2, 0}); +} +TEST(HybridUintTest, Test421) { + HybridUintRoundtrip(HybridUintConfig{4, 2, 1}, 256); +} + +} // namespace +} // namespace jxl |