WIP: Add hardware jpeg decode on tegra platform

content/common/gpu/media/tegra_jpeg_codec_device.h

+// 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.
+//
+// This file contains the implementation of TegraV4L2Device used on
+// Tegra platform.
+
+#ifndef CONTENT_COMMON_GPU_MEDIA_TEGRA_V4L2_VIDEO_DEVICE_H_
+#define CONTENT_COMMON_GPU_MEDIA_TEGRA_V4L2_VIDEO_DEVICE_H_
+
+//#define TEGRA_ACCELERATE
+
+#include "content/common/gpu/media/jpeg_codec.h"
+#include "ui/gl/gl_bindings.h"
+
+
+namespace content {
+
+// This class implements the V4L2Device interface for Tegra platform.
+// It interfaces with libtegrav4l2 library which provides API that exhibit the
+// V4L2 specification via the library API instead of system calls.
+class TegraJpegCodecDevice : public JPEGCodec {
+ public:
+  explicit TegraJpegCodecDevice(Type type);
+  virtual ~TegraJpegCodecDevice();
+
+  virtual bool Initialize() override;
+  virtual bool Decode(const unsigned char* input, size_t input_size,
+                     unsigned char** output_buffer, unsigned* w, unsigned* h,
+                     unsigned* row_bytes) override;
+
+ private:
+  const Type type_;
+  long int hDecoder_;
+
+  DISALLOW_COPY_AND_ASSIGN(TegraJpegCodecDevice);
+};
+
+}  //  namespace content
+
+#endif  // CONTENT_COMMON_GPU_MEDIA_TEGRA_V4L2_VIDEO_DEVICE_H_