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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/base/bit_reader.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace media {
TEST(BitReaderTest, NormalOperationTest) {
uint8 value8;
uint64 value64;
// 0101 0101 1001 1001 repeats 4 times
uint8 buffer[] = {0x55, 0x99, 0x55, 0x99, 0x55, 0x99, 0x55, 0x99};
BitReader reader1(buffer, 6); // Initialize with 6 bytes only
EXPECT_TRUE(reader1.ReadBits(1, &value8));
EXPECT_EQ(value8, 0);
EXPECT_TRUE(reader1.ReadBits(8, &value8));
EXPECT_EQ(value8, 0xab); // 1010 1011
EXPECT_TRUE(reader1.ReadBits(7, &value64));
EXPECT_TRUE(reader1.ReadBits(32, &value64));
EXPECT_EQ(value64, 0x55995599u);
EXPECT_FALSE(reader1.ReadBits(1, &value8));
value8 = 0xff;
EXPECT_TRUE(reader1.ReadBits(0, &value8));
EXPECT_EQ(value8, 0);
BitReader reader2(buffer, 8);
EXPECT_TRUE(reader2.ReadBits(64, &value64));
EXPECT_EQ(value64, 0x5599559955995599ull);
EXPECT_FALSE(reader2.ReadBits(1, &value8));
EXPECT_TRUE(reader2.ReadBits(0, &value8));
}
TEST(BitReaderTest, ReadBeyondEndTest) {
uint8 value8;
uint8 buffer[] = {0x12};
BitReader reader1(buffer, sizeof(buffer));
EXPECT_TRUE(reader1.ReadBits(4, &value8));
EXPECT_FALSE(reader1.ReadBits(5, &value8));
EXPECT_FALSE(reader1.ReadBits(1, &value8));
EXPECT_TRUE(reader1.ReadBits(0, &value8));
}
} // namespace media
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