1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4//
5// This file contains the implementation of TegraV4L2Device used on
6// Tegra platform.
7
8#ifndef CONTENT_COMMON_GPU_MEDIA_TEGRA_V4L2_VIDEO_DEVICE_H_
9#define CONTENT_COMMON_GPU_MEDIA_TEGRA_V4L2_VIDEO_DEVICE_H_
10
11#include "content/common/gpu/media/v4l2_video_device.h"
12#include "ui/gl/gl_bindings.h"
13
14namespace content {
15
16// This class implements the V4L2Device interface for Tegra platform.
17// It interfaces with libtegrav4l2 library which provides API that exhibit the
18// V4L2 specification via the library API instead of system calls.
19class TegraV4L2Device : public V4L2Device {
20 public:
21  explicit TegraV4L2Device(Type type);
22  virtual ~TegraV4L2Device();
23
24  virtual int Ioctl(int flags, void* arg) OVERRIDE;
25  virtual bool Poll(bool poll_device, bool* event_pending) OVERRIDE;
26  virtual bool SetDevicePollInterrupt() OVERRIDE;
27  virtual bool ClearDevicePollInterrupt() OVERRIDE;
28  virtual void* Mmap(void* addr,
29                     unsigned int len,
30                     int prot,
31                     int flags,
32                     unsigned int offset) OVERRIDE;
33  virtual void Munmap(void* addr, unsigned int len) OVERRIDE;
34  virtual bool Initialize() OVERRIDE;
35  virtual EGLImageKHR CreateEGLImage(EGLDisplay egl_display,
36                                     EGLContext egl_context,
37                                     GLuint texture_id,
38                                     gfx::Size frame_buffer_size,
39                                     unsigned int buffer_index,
40                                     size_t planes_count) OVERRIDE;
41  virtual EGLBoolean DestroyEGLImage(EGLDisplay egl_display,
42                                     EGLImageKHR egl_image) OVERRIDE;
43  virtual GLenum GetTextureTarget() OVERRIDE;
44  virtual uint32 PreferredInputFormat() OVERRIDE;
45  virtual uint32 PreferredOutputFormat() OVERRIDE;
46
47 private:
48  const Type type_;
49
50  // The actual device fd.
51  int device_fd_;
52
53  DISALLOW_COPY_AND_ASSIGN(TegraV4L2Device);
54};
55
56}  //  namespace content
57
58#endif  // CONTENT_COMMON_GPU_MEDIA_TEGRA_V4L2_VIDEO_DEVICE_H_
59