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// 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
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