Add support for Tegra V4L2 VDA

content/common/gpu/media/tegra_v4l2_video_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_
+
+#include "content/common/gpu/media/v4l2_video_device.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 TegraV4L2Device : public V4L2Device {
+ public:
+  explicit TegraV4L2Device(EGLContext egl_context);
+  virtual ~TegraV4L2Device();
+
+  virtual int Ioctl(int flags, void* arg) OVERRIDE;
+  virtual bool Poll(bool poll_device, bool* event_pending) OVERRIDE;
+  virtual bool SetDevicePollInterrupt() OVERRIDE;
+  virtual bool ClearDevicePollInterrupt() OVERRIDE;
+  virtual void* Mmap(void* addr,
+                     unsigned int len,
+                     int prot,
+                     int flags,
+                     unsigned int offset) OVERRIDE;
+  virtual void Munmap(void* addr, unsigned int len) OVERRIDE;
+  virtual bool Initialize() OVERRIDE;
+  virtual EGLImageKHR CreateEGLImage(EGLDisplay egl_display,
+                                     GLuint texture_id,
+                                     gfx::Size frame_buffer_size,
+                                     unsigned int buffer_index,
+                                     size_t planes_count) OVERRIDE;
+  virtual EGLBoolean DestroyEGLImage(EGLDisplay egl_display,
+                                     EGLImageKHR egl_image) OVERRIDE;
+  virtual GLenum GetTextureTarget() OVERRIDE;
+  virtual uint32 PreferredOutputFormat() OVERRIDE;
+
+ private:
+  // The actual device fd.
+  int device_fd_;
+
+  // The EGLContext associated with this device.
+  EGLContext egl_context_;
+
+  DISALLOW_COPY_AND_ASSIGN(TegraV4L2Device);
+};
+
+}  //  namespace content
+
+#endif  // CONTENT_COMMON_GPU_MEDIA_TEGRA_V4L2_VIDEO_DEVICE_H_