content/common/gpu/media/tegra_v4l2_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_DEVICE_H_
   9 #define CONTENT_COMMON_GPU_MEDIA_TEGRA_V4L2_DEVICE_H_
  10
  11 #include "content/common/gpu/media/v4l2_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
  23   int Ioctl(int flags, void* arg) override;
  24   bool Poll(bool poll_device, bool* event_pending) override;
  25   bool SetDevicePollInterrupt() override;
  26   bool ClearDevicePollInterrupt() override;
  27   void* Mmap(void* addr,
  28              unsigned int len,
  29              int prot,
  30              int flags,
  31              unsigned int offset) override;
  32   void Munmap(void* addr, unsigned int len) override;
  33   bool Initialize() override;
  34   bool CanCreateEGLImageFrom(uint32_t v4l2_pixfmt) override;
  35   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                              uint32_t v4l2_pixfmt,
  41                              size_t num_v4l2_planes);
  42   EGLBoolean DestroyEGLImage(EGLDisplay egl_display,
  43                              EGLImageKHR egl_image) override;
  44   GLenum GetTextureTarget() override;
  45   uint32 PreferredInputFormat() override;
  46
  47  private:
  48   ~TegraV4L2Device() override;
  49   const Type type_;
  50
  51   // The actual device fd.
  52   int device_fd_;
  53
  54   DISALLOW_COPY_AND_ASSIGN(TegraV4L2Device);
  55 };
  56
  57 }  //  namespace content
  58
  59 #endif  // CONTENT_COMMON_GPU_MEDIA_TEGRA_V4L2_DEVICE_H_