base/android/android_hardware_buffer_compat.h

   1 // Copyright 2017 The Chromium Authors
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef BASE_ANDROID_ANDROID_HARDWARE_BUFFER_COMPAT_H_
   6 #define BASE_ANDROID_ANDROID_HARDWARE_BUFFER_COMPAT_H_
   7
   8 #include <android/hardware_buffer.h>
   9 #include <android/sensor.h>
  10
  11 #include "base/base_export.h"
  12 #include "base/no_destructor.h"
  13
  14 extern "C" {
  15 using PFAHardwareBuffer_allocate = void (*)(const AHardwareBuffer_Desc* desc,
  16                                             AHardwareBuffer** outBuffer);
  17 using PFAHardwareBuffer_acquire = void (*)(AHardwareBuffer* buffer);
  18 using PFAHardwareBuffer_describe = void (*)(const AHardwareBuffer* buffer,
  19                                             AHardwareBuffer_Desc* outDesc);
  20 using PFAHardwareBuffer_lock = int (*)(AHardwareBuffer* buffer,
  21                                        uint64_t usage,
  22                                        int32_t fence,
  23                                        const ARect* rect,
  24                                        void** outVirtualAddress);
  25 using PFAHardwareBuffer_recvHandleFromUnixSocket =
  26     int (*)(int socketFd, AHardwareBuffer** outBuffer);
  27 using PFAHardwareBuffer_release = void (*)(AHardwareBuffer* buffer);
  28 using PFAHardwareBuffer_sendHandleToUnixSocket =
  29     int (*)(const AHardwareBuffer* buffer, int socketFd);
  30 using PFAHardwareBuffer_unlock = int (*)(AHardwareBuffer* buffer,
  31                                          int32_t* fence);
  32 }
  33
  34 namespace base {
  35
  36 // This class provides runtime support for working with AHardwareBuffer objects
  37 // on Android O systems without requiring building for the Android O NDK level.
  38 // Don't call GetInstance() unless IsSupportAvailable() returns true.
  39 class BASE_EXPORT AndroidHardwareBufferCompat {
  40  public:
  41   static bool IsSupportAvailable();
  42   static AndroidHardwareBufferCompat& GetInstance();
  43
  44   AndroidHardwareBufferCompat(const AndroidHardwareBufferCompat&) = delete;
  45   AndroidHardwareBufferCompat& operator=(const AndroidHardwareBufferCompat&) =
  46       delete;
  47
  48   void Allocate(const AHardwareBuffer_Desc* desc, AHardwareBuffer** outBuffer);
  49   void Acquire(AHardwareBuffer* buffer);
  50   void Describe(const AHardwareBuffer* buffer, AHardwareBuffer_Desc* outDesc);
  51   int Lock(AHardwareBuffer* buffer,
  52            uint64_t usage,
  53            int32_t fence,
  54            const ARect* rect,
  55            void** out_virtual_address);
  56   int RecvHandleFromUnixSocket(int socketFd, AHardwareBuffer** outBuffer);
  57   void Release(AHardwareBuffer* buffer);
  58   int SendHandleToUnixSocket(const AHardwareBuffer* buffer, int socketFd);
  59   int Unlock(AHardwareBuffer* buffer, int32_t* fence);
  60
  61  private:
  62   friend class NoDestructor<AndroidHardwareBufferCompat>;
  63   AndroidHardwareBufferCompat();
  64
  65   PFAHardwareBuffer_allocate allocate_;
  66   PFAHardwareBuffer_acquire acquire_;
  67   PFAHardwareBuffer_describe describe_;
  68   PFAHardwareBuffer_lock lock_;
  69   PFAHardwareBuffer_recvHandleFromUnixSocket recv_handle_;
  70   PFAHardwareBuffer_release release_;
  71   PFAHardwareBuffer_sendHandleToUnixSocket send_handle_;
  72   PFAHardwareBuffer_unlock unlock_;
  73 };
  74
  75 }  // namespace base
  76
  77 #endif  // BASE_ANDROID_ANDROID_HARDWARE_BUFFER_COMPAT_H_