content/common/gpu/media/tegra_v4l2_video_device.h

   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
  14 namespace 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.
  19 class 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_