Remove NativeBuffer from libbufferhub

This code is long dead and completely unused. Let's keep buffer hub
related code clean.

Bug: 70046255
Test: buffer_hub_queue-test, buffer_hub-test, build system
Change-Id: I106f1f339757a03af50c318de77199d01765093f
diff --git a/libs/vr/libbufferhub/include/private/dvr/native_buffer.h b/libs/vr/libbufferhub/include/private/dvr/native_buffer.h
deleted file mode 100644
index 140ffc5..0000000
--- a/libs/vr/libbufferhub/include/private/dvr/native_buffer.h
+++ /dev/null
@@ -1,179 +0,0 @@
-#ifndef ANDROID_DVR_NATIVE_BUFFER_H_
-#define ANDROID_DVR_NATIVE_BUFFER_H_
-
-#include <EGL/egl.h>
-#include <EGL/eglext.h>
-#include <log/log.h>
-#include <ui/ANativeObjectBase.h>
-#include <utils/RefBase.h>
-#include <nativebase/nativebase.h>
-
-#include <private/dvr/buffer_hub_client.h>
-
-namespace android {
-namespace dvr {
-
-// ANativeWindowBuffer is the abstraction Android HALs and frameworks use to
-// pass around hardware graphics buffers. The following classes implement this
-// abstraction with different DVR backing buffers, all of which provide
-// different semantics on top of ion/gralloc buffers.
-
-// An implementation of ANativeWindowBuffer backed by an IonBuffer.
-class NativeBuffer
-    : public android::ANativeObjectBase<ANativeWindowBuffer, NativeBuffer,
-                                        android::LightRefBase<NativeBuffer>> {
- public:
-  static constexpr int kEmptyFence = -1;
-
-  explicit NativeBuffer(const std::shared_ptr<IonBuffer>& buffer)
-      : BASE(), buffer_(buffer), fence_(kEmptyFence) {
-    ANativeWindowBuffer::width = buffer->width();
-    ANativeWindowBuffer::height = buffer->height();
-    ANativeWindowBuffer::stride = buffer->stride();
-    ANativeWindowBuffer::format = buffer->format();
-    ANativeWindowBuffer::usage = buffer->usage();
-    handle = buffer_->handle();
-  }
-
-  virtual ~NativeBuffer() {}
-
-  std::shared_ptr<IonBuffer> buffer() { return buffer_; }
-  int fence() const { return fence_.Get(); }
-
-  void SetFence(int fence) { fence_.Reset(fence); }
-
- private:
-  friend class android::LightRefBase<NativeBuffer>;
-
-  std::shared_ptr<IonBuffer> buffer_;
-  pdx::LocalHandle fence_;
-
-  NativeBuffer(const NativeBuffer&) = delete;
-  void operator=(NativeBuffer&) = delete;
-};
-
-class NativeBufferProducer : public android::ANativeObjectBase<
-                                 ANativeWindowBuffer, NativeBufferProducer,
-                                 android::LightRefBase<NativeBufferProducer>> {
- public:
-  static constexpr int kEmptyFence = -1;
-
-  NativeBufferProducer(const std::shared_ptr<BufferProducer>& buffer,
-                       EGLDisplay display, uint32_t surface_buffer_index)
-      : BASE(),
-        buffer_(buffer),
-        surface_buffer_index_(surface_buffer_index),
-        display_(display) {
-    ANativeWindowBuffer::width = buffer_->width();
-    ANativeWindowBuffer::height = buffer_->height();
-    ANativeWindowBuffer::stride = buffer_->stride();
-    ANativeWindowBuffer::format = buffer_->format();
-    ANativeWindowBuffer::usage = buffer_->usage();
-    ANativeWindowBuffer::handle = buffer_->native_handle();
-    if (display_) {
-      image_khr_ =
-          eglCreateImageKHR(display_, EGL_NO_CONTEXT, EGL_NATIVE_BUFFER_ANDROID,
-                            static_cast<ANativeWindowBuffer*>(this), nullptr);
-    } else {
-      image_khr_ = EGL_NO_IMAGE_KHR;
-    }
-  }
-
-  explicit NativeBufferProducer(const std::shared_ptr<BufferProducer>& buffer)
-      : NativeBufferProducer(buffer, nullptr, 0) {}
-
-  virtual ~NativeBufferProducer() {
-    if (image_khr_ != EGL_NO_IMAGE_KHR)
-      eglDestroyImageKHR(display_, image_khr_);
-  }
-
-  EGLImageKHR image_khr() const { return image_khr_; }
-  std::shared_ptr<BufferProducer> buffer() const { return buffer_; }
-  int release_fence() const { return release_fence_.Get(); }
-  uint32_t surface_buffer_index() const { return surface_buffer_index_; }
-
-  // Return the release fence, passing ownership to the caller.
-  pdx::LocalHandle ClaimReleaseFence() { return std::move(release_fence_); }
-
-  // Post the buffer consumer, closing the acquire and release fences.
-  int Post(int acquire_fence, uint64_t sequence) {
-    release_fence_.Close();
-    return buffer_->Post(pdx::LocalHandle(acquire_fence), sequence);
-  }
-
-  // Gain the buffer producer, closing the previous release fence if valid.
-  int Gain() { return buffer_->Gain(&release_fence_); }
-
-  // Asynchronously gain the buffer, closing the previous release fence.
-  int GainAsync() {
-    release_fence_.Close();
-    return buffer_->GainAsync();
-  }
-
- private:
-  friend class android::LightRefBase<NativeBufferProducer>;
-
-  std::shared_ptr<BufferProducer> buffer_;
-  pdx::LocalHandle release_fence_;
-  EGLImageKHR image_khr_;
-  uint32_t surface_buffer_index_;
-  EGLDisplay display_;
-
-  NativeBufferProducer(const NativeBufferProducer&) = delete;
-  void operator=(NativeBufferProducer&) = delete;
-};
-
-// NativeBufferConsumer is an implementation of ANativeWindowBuffer backed by a
-// BufferConsumer.
-class NativeBufferConsumer : public android::ANativeObjectBase<
-                                 ANativeWindowBuffer, NativeBufferConsumer,
-                                 android::LightRefBase<NativeBufferConsumer>> {
- public:
-  static constexpr int kEmptyFence = -1;
-
-  explicit NativeBufferConsumer(const std::shared_ptr<BufferConsumer>& buffer)
-      : BASE(), buffer_(buffer), acquire_fence_(kEmptyFence), sequence_(0) {
-    ANativeWindowBuffer::width = buffer_->width();
-    ANativeWindowBuffer::height = buffer_->height();
-    ANativeWindowBuffer::stride = buffer_->stride();
-    ANativeWindowBuffer::format = buffer_->format();
-    ANativeWindowBuffer::usage = buffer_->usage();
-    handle = buffer_->native_handle();
-  }
-
-  virtual ~NativeBufferConsumer() {}
-
-  std::shared_ptr<BufferConsumer> buffer() const { return buffer_; }
-  int acquire_fence() const { return acquire_fence_.Get(); }
-  uint64_t sequence() const { return sequence_; }
-
-  // Return the acquire fence, passing ownership to the caller.
-  pdx::LocalHandle ClaimAcquireFence() { return std::move(acquire_fence_); }
-
-  // Acquire the underlying buffer consumer, closing the previous acquire fence
-  // if valid.
-  int Acquire() { return buffer_->Acquire(&acquire_fence_, &sequence_); }
-
-  // Release the buffer consumer, closing the acquire and release fences if
-  // valid.
-  int Release(int release_fence) {
-    acquire_fence_.Close();
-    sequence_ = 0;
-    return buffer_->Release(pdx::LocalHandle(release_fence));
-  }
-
- private:
-  friend class android::LightRefBase<NativeBufferConsumer>;
-
-  std::shared_ptr<BufferConsumer> buffer_;
-  pdx::LocalHandle acquire_fence_;
-  uint64_t sequence_;
-
-  NativeBufferConsumer(const NativeBufferConsumer&) = delete;
-  void operator=(NativeBufferConsumer&) = delete;
-};
-
-}  // namespace dvr
-}  // namespace android
-
-#endif  // ANDROID_DVR_NATIVE_BUFFER_H_
diff --git a/libs/vr/libdisplay/display_client.cpp b/libs/vr/libdisplay/display_client.cpp
index 442c82d..f67e258 100644
--- a/libs/vr/libdisplay/display_client.cpp
+++ b/libs/vr/libdisplay/display_client.cpp
@@ -9,7 +9,6 @@
 #include <mutex>
 
 #include <private/dvr/display_protocol.h>
-#include <private/dvr/native_buffer.h>
 
 using android::pdx::ErrorStatus;
 using android::pdx::LocalHandle;