WIP: Add hardware jpeg decode on tegra platform

content/common/gpu/media/jpeg_codec_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 <string>
+
+#include "base/bind.h"
+#include "base/command_line.h"
+#include "base/files/file_util.h"
+#include "base/logging.h"
+#include "content/common/gpu/media/jpeg_codec.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+// This program is run like this:
+// build/android/test_runner.py gtest -s content_unittests --debug -vvv
+// --gtest-filter JpegDecoderTest.* --test-arguments="--input_file=
+// /sdcard/flowers.jpg"
+//
+// The input is read from jpeg file. The output is written to output.rgb if it
+// is given.
+
+namespace content {
+
+// These default values are used if nothing is specified in the command line.
+const base::FilePath::CharType* kDefaultInputFile =
+    FILE_PATH_LITERAL("/sdcard/red.jpg");
+
+// This class encapsulates the use of JpegDecoderTest to a simpler interface.
+// It reads an jpg bytestream from a file and outputs the decoded
+// frames (in RGBA format) to another file.
+class JpegDecoderTest :  public testing::Test {
+ public:
+  JpegDecoderTest();
+  ~JpegDecoderTest();
+
+  // Initialize the decoder. Return true if successful.
+  bool Decode();
+ protected:
+  virtual void SetUp() override;
+
+ private:
+  scoped_ptr<JPEGCodec> decoder_;
+  std::string data_;            // data read from input_file
+  // These are the command line parameters
+  base::FilePath input_file_;
+  base::FilePath output_file_;
+};
+
+JpegDecoderTest::JpegDecoderTest() {
+}
+
+JpegDecoderTest::~JpegDecoderTest() {
+  decoder_.reset();
+}
+
+bool JpegDecoderTest::Decode() {
+  bool ret = false;
+
+  decoder_ = JPEGCodec::Create(JPEGCodec::kDecoder);
+
+  if (!base::ReadFileToString(input_file_, &data_)) {
+    LOG(ERROR) << "failed to read input data from " << input_file_.value();
+    return false;
+  }
+  unsigned w, h, row_bytes;
+  unsigned char* out_data;
+
+  ret = decoder_->Decode(reinterpret_cast<const uint8*>(data_.c_str()),
+                        data_.size(), &out_data, &w,
+                        &h, &row_bytes);
+
+  LOG(INFO) << "JPEG Decoder w: " <<w;
+  LOG(INFO) << "JPEG Decoder h: " <<h;
+  LOG(INFO) << "JPEG Decoder row bytes: " <<row_bytes;
+
+  // This creates or truncates output_file.
+  // Without it, AppendToFile() will not work.
+  if (!output_file_.empty()) {
+    if (base::WriteFile(output_file_,reinterpret_cast<const char*>(out_data),
+        row_bytes * h) != 0) {
+      return false;
+    }
+  }
+
+  return ret;
+}
+
+void JpegDecoderTest::SetUp() {
+    // Process command line.
+    base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
+    CHECK(cmd_line);
+
+    base::CommandLine::SwitchMap switches = cmd_line->GetSwitches();
+    for (base::CommandLine::SwitchMap::const_iterator it = switches.begin();
+            it != switches.end();
+            ++it) {
+        if (it->first == "input_file") {
+            input_file_ = base::FilePath(it->second);
+            continue;
+        }
+        if (it->first == "output_file") {
+            output_file_ = base::FilePath(it->second);
+            continue;
+        }
+    }
+    // If nothing specified, use the default file in the source tree.
+    if (input_file_.empty()) {
+        input_file_ = base::FilePath(kDefaultInputFile);
+    }
+    LOG(INFO) << "Input File: " << input_file_.value();
+    LOG(INFO) << "Output File: " << output_file_.value();
+}
+
+
+TEST_F(JpegDecoderTest, TestDecode) {
+  EXPECT_TRUE(Decode());
+}
+
+}  // namespace content