Add JPEG parser for JPEG decode acceleration

content/common/gpu/media/vaapi_jpeg_parser_unittest.cc

+// 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 "base/at_exit.h"
+#include "base/files/memory_mapped_file.h"
+#include "base/path_service.h"
+#include "content/common/gpu/media/vaapi_jpeg_parser.h"
+#include "media/base/test_data_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+
+TEST(VaapiJpegParserTest, Parsing) {

[wuchengli, 2014/12/08 09:25:11]

Is there any Parse() failure case worth testing?

+  base::FilePath data_dir;
+  ASSERT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &data_dir));
+  data_dir = data_dir.AppendASCII("content")
+                 .AppendASCII("test")
+                 .AppendASCII("data")
+                 .AppendASCII("jpeg");
+
+  // This sample frame is captured from Chromebook Pixel
+  base::FilePath file_path = data_dir.AppendASCII("pixel-1280x720.bin");

[wuchengli, 2014/12/08 09:25:11]

Combine this with previous statement.
base::FilePath file_path = data_dir.AppendASCII("content")
                 .AppendASCII("test")
                 .AppendASCII("data")
                 .AppendASCII("jpeg")
                 AppendASCII("pixel-1280x720.bin");

+
+  base::MemoryMappedFile stream;
+  ASSERT_TRUE(stream.Initialize(file_path))
+      << "Couldn't open stream file: " << file_path.MaybeAsASCII();
+
+  VaapiJpegParser parser(stream.data(), stream.length());
+
+  ASSERT_TRUE(parser.Parse());
+
+  const JpegParseResult* result = parser.GetParsedResult();
+
+  // Verify selected fields
+  // SOF fields
+  ASSERT_EQ(result->visible_width, 1280);

[wuchengli, 2014/12/08 09:25:11]

Use EXPECT_ for all the following cases to verify more fields in one test. 

[kcwu, 2014/12/16 06:23:55]

Done.

+  ASSERT_EQ(result->visible_height, 720);
+  ASSERT_EQ(result->num_component, 3);
+  ASSERT_EQ(result->components[0].id, 1);
+  ASSERT_EQ(result->components[1].id, 2);
+  ASSERT_EQ(result->components[2].id, 3);
+
+  // DQT fields
+  ASSERT_TRUE(result->q_table[0].valid);
+  ASSERT_TRUE(result->q_table[1].valid);
+
+  // SOS fields
+  ASSERT_EQ(result->scan.components[1].dc_selector, 1);
+  ASSERT_EQ(result->scan.components[1].ac_selector, 1);
+  ASSERT_EQ(result->scan.data_size, 121150u);

[wuchengli, 2014/12/08 09:25:11]

You should verify all or most the fields in vaapi_jpeg_parser.h.

+}
+
+}  // namespace content
+
+int main(int argc, char** argv) {
+  testing::InitGoogleTest(&argc, argv);
+  base::AtExitManager exit_manager;
+  return RUN_ALL_TESTS();
+}