Add HE AAC support to ISO BMFF.

content/common/gpu/media/h264_bit_reader_unittest.cc

+// 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 "content/common/gpu/media/h264_bit_reader.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+using content::H264BitReader;
+
+TEST(BitReaderTest, H264StreamTest) {
+  // This stream contains an escape sequence. Its last byte only has 4 bits.
+  // 0001 0010 0011 0100 0000 0000 0000 0000 0000 0011 0101 0110 0111 0000
+  uint8 buffer[] = {0x12, 0x34, 0x00, 0x00, 0x03, 0x56, 0x70};
+  H264BitReader reader;
+  uint8 value8;
+  uint32 value32;
+
+  reader.Initialize(buffer, sizeof(buffer));
+  EXPECT_EQ(reader.Tell(), 0);
+  EXPECT_TRUE(reader.ReadBits(4, &value8));
+  EXPECT_EQ(value8, 1u);
+  EXPECT_EQ(reader.Tell(), 4);
+  EXPECT_TRUE(reader.HasMoreData());
+
+  EXPECT_TRUE(reader.ReadBits(8, &value8));
+  EXPECT_EQ(value8, 0x23u);
+  EXPECT_EQ(reader.Tell(), 12);
+  EXPECT_TRUE(reader.HasMoreData());
+
+  EXPECT_TRUE(reader.ReadBits(24, &value32));
+  EXPECT_EQ(value32, 0x400005u);
+  EXPECT_EQ(reader.Tell(), 44);  // Include the skipped escape byte
+  EXPECT_TRUE(reader.HasMoreData());
+
+  EXPECT_TRUE(reader.ReadBits(8, &value8));
+  EXPECT_EQ(value8, 0x67u);
+  EXPECT_EQ(reader.Tell(), 52);  // Include the skipped escape byte
+  EXPECT_FALSE(reader.HasMoreData());
+
+  EXPECT_TRUE(reader.ReadBits(0, &value8));
+  EXPECT_EQ(reader.Tell(), 52);  // Include the skipped escape byte
+  EXPECT_FALSE(reader.ReadBits(1, &value8));
+  EXPECT_FALSE(reader.HasMoreData());
+
+  // Do it again using SkipBits
+  reader.Initialize(buffer, sizeof(buffer));
+  EXPECT_EQ(reader.Tell(), 0);
+  EXPECT_TRUE(reader.SkipBits(4));
+  EXPECT_EQ(reader.Tell(), 4);
+  EXPECT_TRUE(reader.HasMoreData());
+
+  EXPECT_TRUE(reader.SkipBits(8));
+  EXPECT_EQ(reader.Tell(), 12);
+  EXPECT_TRUE(reader.HasMoreData());
+
+  EXPECT_TRUE(reader.SkipBits(24));
+  EXPECT_EQ(reader.Tell(), 44);  // Include the skipped escape byte
+  EXPECT_TRUE(reader.HasMoreData());
+
+  EXPECT_TRUE(reader.SkipBits(8));
+  EXPECT_EQ(reader.Tell(), 52);  // Include the skipped escape byte
+  EXPECT_FALSE(reader.HasMoreData());
+
+  EXPECT_TRUE(reader.SkipBits(0));
+  EXPECT_FALSE(reader.SkipBits(1));
+  EXPECT_FALSE(reader.HasMoreData());
+}