68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "media/base/bit_reader.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace media {
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TEST(BitReaderTest, NormalOperationTest) {
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uint8 value8;
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uint64 value64;
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// 0101 0101 1001 1001 repeats 4 times
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uint8 buffer[] = {0x55, 0x99, 0x55, 0x99, 0x55, 0x99, 0x55, 0x99};
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BitReader reader1(buffer, 6); // Initialize with 6 bytes only
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EXPECT_TRUE(reader1.ReadBits(1, &value8));
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EXPECT_EQ(value8, 0);
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EXPECT_TRUE(reader1.ReadBits(8, &value8));
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EXPECT_EQ(value8, 0xab); // 1010 1011
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EXPECT_TRUE(reader1.ReadBits(7, &value64));
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EXPECT_TRUE(reader1.ReadBits(32, &value64));
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EXPECT_EQ(value64, 0x55995599u);
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EXPECT_FALSE(reader1.ReadBits(1, &value8));
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value8 = 0xff;
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EXPECT_TRUE(reader1.ReadBits(0, &value8));
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EXPECT_EQ(value8, 0);
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BitReader reader2(buffer, 8);
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EXPECT_TRUE(reader2.ReadBits(64, &value64));
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EXPECT_EQ(value64, 0x5599559955995599ull);
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EXPECT_FALSE(reader2.ReadBits(1, &value8));
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EXPECT_TRUE(reader2.ReadBits(0, &value8));
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}
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TEST(BitReaderTest, ReadBeyondEndTest) {
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uint8 value8;
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uint8 buffer[] = {0x12};
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BitReader reader1(buffer, sizeof(buffer));
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EXPECT_TRUE(reader1.ReadBits(4, &value8));
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EXPECT_FALSE(reader1.ReadBits(5, &value8));
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EXPECT_FALSE(reader1.ReadBits(1, &value8));
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EXPECT_TRUE(reader1.ReadBits(0, &value8));
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}
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TEST(BitReaderTest, SkipBitsTest) {
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uint8 value8;
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uint8 buffer[] = { 0x0a, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
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BitReader reader1(buffer, sizeof(buffer));
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EXPECT_TRUE(reader1.SkipBits(2));
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EXPECT_TRUE(reader1.ReadBits(3, &value8));
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EXPECT_EQ(value8, 1);
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EXPECT_TRUE(reader1.SkipBits(11));
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EXPECT_TRUE(reader1.ReadBits(8, &value8));
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EXPECT_EQ(value8, 3);
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EXPECT_TRUE(reader1.SkipBits(76));
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EXPECT_TRUE(reader1.ReadBits(4, &value8));
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EXPECT_EQ(value8, 13);
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EXPECT_FALSE(reader1.SkipBits(100));
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EXPECT_TRUE(reader1.SkipBits(0));
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EXPECT_FALSE(reader1.SkipBits(1));
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}
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} // namespace media
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