Add JPEG parser for JPEG decode acceleration

media/filters/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 "media/base/test_data_util.h"
+#include "media/filters/jpeg_parser.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace media {
+
+TEST(JpegParserTest, Parsing) {
+  base::FilePath data_dir;
+  ASSERT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &data_dir));
+
+  // This sample frame is captured from Chromebook Pixel
+  base::FilePath file_path = data_dir.AppendASCII("media")
+                                 .AppendASCII("test")
+                                 .AppendASCII("data")
+                                 .AppendASCII("pixel-1280x720.jpg");
+
+  base::MemoryMappedFile stream;
+  ASSERT_TRUE(stream.Initialize(file_path))
+      << "Couldn't open stream file: " << file_path.MaybeAsASCII();
+
+  JpegParseResult result;
+  ASSERT_TRUE(JpegParser::Parse(stream.data(), stream.length(), &result));
+
+  // Verify selected fields

[xhwang, 2015/01/12 18:08:58]

empty line after this

[kcwu, 2015/01/13 14:57:01]

Done.

+  // SOF fields
+  EXPECT_EQ(1280, result.visible_width);
+  EXPECT_EQ(720, result.visible_height);
+  EXPECT_EQ(3, result.num_components);
+  EXPECT_EQ(1, result.components[0].id);
+  EXPECT_EQ(2, result.components[0].horizontal_sampling_factor);
+  EXPECT_EQ(1, result.components[0].vertical_sampling_factor);
+  EXPECT_EQ(0, result.components[0].quantization_table_selector);
+  EXPECT_EQ(2, result.components[1].id);
+  EXPECT_EQ(1, result.components[1].horizontal_sampling_factor);
+  EXPECT_EQ(1, result.components[1].vertical_sampling_factor);
+  EXPECT_EQ(1, result.components[1].quantization_table_selector);
+  EXPECT_EQ(3, result.components[2].id);
+  EXPECT_EQ(1, result.components[2].horizontal_sampling_factor);
+  EXPECT_EQ(1, result.components[2].vertical_sampling_factor);
+  EXPECT_EQ(1, result.components[2].quantization_table_selector);
+
+  // DRI fields
+  EXPECT_EQ(0, result.restart_interval);
+
+  // DQT fields
+  EXPECT_TRUE(result.q_table[0].valid);
+  EXPECT_TRUE(result.q_table[1].valid);
+  EXPECT_FALSE(result.q_table[2].valid);
+  EXPECT_FALSE(result.q_table[3].valid);
+
+  // DHT fields (no DHT marker)
+  EXPECT_FALSE(result.dc_table[0].valid);
+  EXPECT_FALSE(result.ac_table[0].valid);
+  EXPECT_FALSE(result.dc_table[1].valid);
+  EXPECT_FALSE(result.ac_table[1].valid);
+
+  // SOS fields
+  EXPECT_EQ(3, result.scan.num_components);
+  EXPECT_EQ(1, result.scan.components[0].component_selector);
+  EXPECT_EQ(0, result.scan.components[0].dc_selector);
+  EXPECT_EQ(0, result.scan.components[0].ac_selector);
+  EXPECT_EQ(2, result.scan.components[1].component_selector);
+  EXPECT_EQ(1, result.scan.components[1].dc_selector);
+  EXPECT_EQ(1, result.scan.components[1].ac_selector);
+  EXPECT_EQ(3, result.scan.components[2].component_selector);
+  EXPECT_EQ(1, result.scan.components[2].dc_selector);
+  EXPECT_EQ(1, result.scan.components[2].ac_selector);
+  EXPECT_EQ(121150u, result.scan.data_size);
+}
+
+TEST(JpegParserTest, ParsingFail) {
+  const uint8_t data[] = {0, 1, 2, 3};  // not jpeg
+  JpegParseResult result;
+  ASSERT_FALSE(JpegParser::Parse(data, sizeof(data), &result));
+}
+
+}  // namespace media