V4L2VDA: Generalize EGLImage import and query driver for output formats.

content/common/gpu/media/generic_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 GenericV4L2Device used on
 // platforms, which provide generic V4L2 video codec devices.
 
 #ifndef CONTENT_COMMON_GPU_MEDIA_GENERIC_V4L2_VIDEO_DEVICE_H_
 #define CONTENT_COMMON_GPU_MEDIA_GENERIC_V4L2_VIDEO_DEVICE_H_
 
 #include "content/common/gpu/media/v4l2_video_device.h"
 
 namespace content {
 
 class GenericV4L2Device : public V4L2Device {
  public:
   explicit GenericV4L2Device(Type type);
   virtual ~GenericV4L2Device();
 
   // V4L2Device implementation.
-  virtual int Ioctl(int request, 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,
-                                     EGLContext egl_context,
-                                     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 PreferredInputFormat() override;
-  virtual uint32 PreferredOutputFormat() override;
+  int Ioctl(int request, void* arg) override;
+  bool Poll(bool poll_device, bool* event_pending) override;
+  bool SetDevicePollInterrupt() override;
+  bool ClearDevicePollInterrupt() override;
+  void* Mmap(void* addr,
+             unsigned int len,
+             int prot,
+             int flags,
+             unsigned int offset) override;
+  void Munmap(void* addr, unsigned int len) override;
+  bool Initialize() override;
+  bool CanCreateEGLImageFrom(uint32_t v4l2_pixfmt) override;
+  EGLImageKHR CreateEGLImage(EGLDisplay egl_display,
+                             EGLContext egl_context,
+                             GLuint texture_id,
+                             gfx::Size frame_buffer_size,
+                             unsigned int buffer_index,
+                             uint32_t v4l2_pixfmt,
+                             size_t num_v4l2_planes);
+  EGLBoolean DestroyEGLImage(EGLDisplay egl_display,
+                             EGLImageKHR egl_image) override;
+  GLenum GetTextureTarget() override;
+  uint32 PreferredInputFormat() override;
 
  private:
   const Type type_;
 
   // The actual device fd.
   int device_fd_;
 
   // eventfd fd to signal device poll thread when its poll() should be
   // interrupted.
   int device_poll_interrupt_fd_;
 
   DISALLOW_COPY_AND_ASSIGN(GenericV4L2Device);
 };
 }  //  namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_GENERIC_V4L2_VIDEO_DEVICE_H_