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// Copyright 2014 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/filters/h264_bit_reader.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace media {
TEST(H264BitReaderTest, ReadStreamWithoutEscapeAndTrailingZeroBytes) {
H264BitReader reader;
const unsigned char rbsp[] = {0x01, 0x23, 0x45, 0x67, 0x89, 0xa0};
int dummy = 0;
EXPECT_TRUE(reader.Initialize(rbsp, sizeof(rbsp)));
EXPECT_TRUE(reader.ReadBits(1, &dummy));
EXPECT_EQ(dummy, 0x00);
EXPECT_EQ(reader.NumBitsLeft(), 47);
EXPECT_TRUE(reader.HasMoreRBSPData());
EXPECT_TRUE(reader.ReadBits(8, &dummy));
EXPECT_EQ(dummy, 0x02);
EXPECT_EQ(reader.NumBitsLeft(), 39);
EXPECT_TRUE(reader.HasMoreRBSPData());
EXPECT_TRUE(reader.ReadBits(31, &dummy));
EXPECT_EQ(dummy, 0x23456789);
EXPECT_EQ(reader.NumBitsLeft(), 8);
EXPECT_TRUE(reader.HasMoreRBSPData());
EXPECT_TRUE(reader.ReadBits(1, &dummy));
EXPECT_EQ(dummy, 1);
EXPECT_EQ(reader.NumBitsLeft(), 7);
EXPECT_TRUE(reader.HasMoreRBSPData());
EXPECT_TRUE(reader.ReadBits(1, &dummy));
EXPECT_EQ(dummy, 0);
EXPECT_EQ(reader.NumBitsLeft(), 6);
EXPECT_FALSE(reader.HasMoreRBSPData());
}
TEST(H264BitReaderTest, SingleByteStream) {
H264BitReader reader;
const unsigned char rbsp[] = {0x18};
int dummy = 0;
EXPECT_TRUE(reader.Initialize(rbsp, sizeof(rbsp)));
EXPECT_EQ(reader.NumBitsLeft(), 8);
EXPECT_TRUE(reader.HasMoreRBSPData());
EXPECT_TRUE(reader.ReadBits(4, &dummy));
EXPECT_EQ(dummy, 0x01);
EXPECT_EQ(reader.NumBitsLeft(), 4);
EXPECT_FALSE(reader.HasMoreRBSPData());
}
TEST(H264BitReaderTest, StopBitOccupyFullByte) {
H264BitReader reader;
const unsigned char rbsp[] = {0xab, 0x80};
int dummy = 0;
EXPECT_TRUE(reader.Initialize(rbsp, sizeof(rbsp)));
EXPECT_EQ(reader.NumBitsLeft(), 16);
EXPECT_TRUE(reader.HasMoreRBSPData());
EXPECT_TRUE(reader.ReadBits(8, &dummy));
EXPECT_EQ(dummy, 0xab);
EXPECT_EQ(reader.NumBitsLeft(), 8);
EXPECT_FALSE(reader.HasMoreRBSPData());
}
} // namespace media
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