Add VaapiVideoEncodeAccelerator for HW-accelerated video encode.

media/filters/h264_bitstream_buffer_unittest.cc

Index: media/filters/h264_bitstream_buffer_unittest.cc
diff --git a/media/filters/h264_bitstream_buffer_unittest.cc b/media/filters/h264_bitstream_buffer_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..37758296028e431d8d2c572b29b800746d05a651
--- /dev/null
+++ b/media/filters/h264_bitstream_buffer_unittest.cc
@@ -0,0 +1,55 @@
+// 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_bitstream_buffer.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace media {
+
+namespace {
+const uint64 kTestPattern = 0xfedcba0987654321;
+}
+
+class H264BitstreamBufferAppendBitsTest
+    : public ::testing::TestWithParam<size_t> {};
+
+// TODO(posciak): More tests!
+
+TEST_P(H264BitstreamBufferAppendBitsTest, AppendAndVerifyBits) {
+  H264BitstreamBuffer b;
+  uint64 num_bits = GetParam();
+  // TODO(posciak): Tests for >64 bits.
+  ASSERT_LE(num_bits, 64u);
+  uint64 num_bytes = (num_bits + 7) / 8;
+
+  b.AppendBits(num_bits, kTestPattern);
+  b.FlushReg();
+
+  EXPECT_EQ(b.BytesInBuffer(), num_bytes);
+
+  uint8* ptr = b.data();
+  uint64 got = 0;
+  uint64 expected = kTestPattern;
+
+  if (num_bits < 64)
+    expected &= ((1ull << num_bits) - 1);
+
+  while (num_bits > 8) {
+    got |= (*ptr & 0xff);
+    num_bits -= 8;
+    got <<= (num_bits > 8 ? 8 : num_bits);
+    ptr++;
+  }
+  if (num_bits > 0) {
+    uint64 temp = (*ptr & 0xff);
+    temp >>= (8 - num_bits);
+    got |= temp;
+  }
+  EXPECT_EQ(got, expected) << std::hex << "0x" << got << " vs 0x" << expected;
+}
+
+INSTANTIATE_TEST_CASE_P(AppendNumBits,
+                        H264BitstreamBufferAppendBitsTest,
+                        ::testing::Range(1ul, 65ul));
+}  // namespace media