diff --git a/libs/vr/libdvr/dvr_api.cpp b/libs/vr/libdvr/dvr_api.cpp
index 7d4e2d1..d14f040 100644
--- a/libs/vr/libdvr/dvr_api.cpp
+++ b/libs/vr/libdvr/dvr_api.cpp
@@ -41,10 +41,19 @@
     }                                                          \
   } while (0)
 
+#define DVR_V1_API_ENTRY_DEPRECATED(name)                      \
+  do {                                                         \
+    if ((offsetof(DvrApi_v1, name) + sizeof(dvr_api->name)) <= \
+        clamped_struct_size) {                                 \
+      dvr_api->name = nullptr;                                 \
+    }                                                          \
+  } while (0)
+
 #include "include/dvr/dvr_api_entries.h"
 
 // Undefine macro definitions to play nice with Google3 style rules.
 #undef DVR_V1_API_ENTRY
+#undef DVR_V1_API_ENTRY_DEPRECATED
 
     return 0;
   }
diff --git a/libs/vr/libdvr/dvr_buffer.cpp b/libs/vr/libdvr/dvr_buffer.cpp
index 88b649f..baf1f2f 100644
--- a/libs/vr/libdvr/dvr_buffer.cpp
+++ b/libs/vr/libdvr/dvr_buffer.cpp
@@ -38,11 +38,6 @@
 
 extern "C" {
 
-void dvrWriteBufferCreateEmpty(DvrWriteBuffer** write_buffer) {
-  if (write_buffer)
-    *write_buffer = new DvrWriteBuffer;
-}
-
 void dvrWriteBufferDestroy(DvrWriteBuffer* write_buffer) {
   if (write_buffer != nullptr) {
     ALOGW_IF(
@@ -58,14 +53,6 @@
   return write_buffer && write_buffer->write_buffer;
 }
 
-int dvrWriteBufferClear(DvrWriteBuffer* write_buffer) {
-  if (!write_buffer)
-    return -EINVAL;
-
-  write_buffer->write_buffer = nullptr;
-  return 0;
-}
-
 int dvrWriteBufferGetId(DvrWriteBuffer* write_buffer) {
   if (!write_buffer || !write_buffer->write_buffer)
     return -EINVAL;
@@ -82,38 +69,6 @@
       write_buffer->write_buffer->buffer()->buffer().get(), hardware_buffer);
 }
 
-int dvrWriteBufferPost(DvrWriteBuffer* write_buffer, int ready_fence_fd,
-                       const void* meta, size_t meta_size_bytes) {
-  if (!write_buffer || !write_buffer->write_buffer)
-    return -EINVAL;
-
-  pdx::LocalHandle fence(ready_fence_fd);
-  int result = write_buffer->write_buffer->Post(fence, meta, meta_size_bytes);
-  return result;
-}
-
-int dvrWriteBufferGain(DvrWriteBuffer* write_buffer, int* release_fence_fd) {
-  if (!write_buffer || !write_buffer->write_buffer || !release_fence_fd)
-    return -EINVAL;
-
-  pdx::LocalHandle release_fence;
-  int result = write_buffer->write_buffer->Gain(&release_fence);
-  *release_fence_fd = release_fence.Release();
-  return result;
-}
-
-int dvrWriteBufferGainAsync(DvrWriteBuffer* write_buffer) {
-  if (!write_buffer || !write_buffer->write_buffer)
-    return -EINVAL;
-
-  return write_buffer->write_buffer->GainAsync();
-}
-
-void dvrReadBufferCreateEmpty(DvrReadBuffer** read_buffer) {
-  if (read_buffer)
-    *read_buffer = new DvrReadBuffer;
-}
-
 void dvrReadBufferDestroy(DvrReadBuffer* read_buffer) {
   if (read_buffer != nullptr) {
     ALOGW_IF(
@@ -129,14 +84,6 @@
   return read_buffer && read_buffer->read_buffer;
 }
 
-int dvrReadBufferClear(DvrReadBuffer* read_buffer) {
-  if (!read_buffer)
-    return -EINVAL;
-
-  read_buffer->read_buffer = nullptr;
-  return 0;
-}
-
 int dvrReadBufferGetId(DvrReadBuffer* read_buffer) {
   if (!read_buffer || !read_buffer->read_buffer)
     return -EINVAL;
@@ -153,34 +100,6 @@
       read_buffer->read_buffer->buffer()->buffer().get(), hardware_buffer);
 }
 
-int dvrReadBufferAcquire(DvrReadBuffer* read_buffer, int* ready_fence_fd,
-                         void* meta, size_t meta_size_bytes) {
-  if (!read_buffer || !read_buffer->read_buffer)
-    return -EINVAL;
-
-  pdx::LocalHandle ready_fence;
-  int result =
-      read_buffer->read_buffer->Acquire(&ready_fence, meta, meta_size_bytes);
-  *ready_fence_fd = ready_fence.Release();
-  return result;
-}
-
-int dvrReadBufferRelease(DvrReadBuffer* read_buffer, int release_fence_fd) {
-  if (!read_buffer || !read_buffer->read_buffer)
-    return -EINVAL;
-
-  pdx::LocalHandle fence(release_fence_fd);
-  int result = read_buffer->read_buffer->Release(fence);
-  return result;
-}
-
-int dvrReadBufferReleaseAsync(DvrReadBuffer* read_buffer) {
-  if (!read_buffer || !read_buffer->read_buffer)
-    return -EINVAL;
-
-  return read_buffer->read_buffer->ReleaseAsync();
-}
-
 void dvrBufferDestroy(DvrBuffer* buffer) { delete buffer; }
 
 int dvrBufferGetAHardwareBuffer(DvrBuffer* buffer,
@@ -198,27 +117,4 @@
   return android::dvr::kSharedBufferLayoutVersion;
 }
 
-const struct native_handle* dvrWriteBufferGetNativeHandle(
-    DvrWriteBuffer* write_buffer) {
-  if (!write_buffer || !write_buffer->write_buffer)
-    return nullptr;
-
-  return write_buffer->write_buffer->native_handle();
-}
-
-const struct native_handle* dvrReadBufferGetNativeHandle(
-    DvrReadBuffer* read_buffer) {
-  if (!read_buffer || !read_buffer->read_buffer)
-    return nullptr;
-
-  return read_buffer->read_buffer->native_handle();
-}
-
-const struct native_handle* dvrBufferGetNativeHandle(DvrBuffer* buffer) {
-  if (!buffer || !buffer->buffer)
-    return nullptr;
-
-  return buffer->buffer->handle();
-}
-
 }  // extern "C"
diff --git a/libs/vr/libdvr/dvr_buffer_queue.cpp b/libs/vr/libdvr/dvr_buffer_queue.cpp
index 6991b15..74cee3f 100644
--- a/libs/vr/libdvr/dvr_buffer_queue.cpp
+++ b/libs/vr/libdvr/dvr_buffer_queue.cpp
@@ -273,14 +273,6 @@
   return write_queue->id();
 }
 
-int dvrWriteBufferQueueGetExternalSurface(DvrWriteBufferQueue* write_queue,
-                                          ANativeWindow** out_window) {
-  ALOGW(
-      "dvrWriteBufferQueueGetExternalSurface: This API has been deprecated and "
-      "renamed to dvrWriteBufferQueueGetANativeWindow.");
-  return dvrWriteBufferQueueGetANativeWindow(write_queue, out_window);
-}
-
 int dvrWriteBufferQueueGetANativeWindow(DvrWriteBufferQueue* write_queue,
                                         ANativeWindow** out_window) {
   if (!write_queue || !out_window)
@@ -297,15 +289,6 @@
   return write_queue->CreateReadQueue(out_read_queue);
 }
 
-int dvrWriteBufferQueueDequeue(DvrWriteBufferQueue* write_queue, int timeout,
-                               DvrWriteBuffer* write_buffer,
-                               int* out_fence_fd) {
-  if (!write_queue || !write_buffer || !out_fence_fd)
-    return -EINVAL;
-
-  return write_queue->Dequeue(timeout, write_buffer, out_fence_fd);
-}
-
 int dvrWriteBufferQueueGainBuffer(DvrWriteBufferQueue* write_queue, int timeout,
                                   DvrWriteBuffer** out_write_buffer,
                                   DvrNativeBufferMetadata* out_meta,
@@ -355,34 +338,6 @@
   return 0;
 }
 
-int DvrReadBufferQueue::Dequeue(int timeout, DvrReadBuffer* read_buffer,
-                                int* out_fence_fd, void* out_meta,
-                                size_t meta_size_bytes) {
-  if (meta_size_bytes != consumer_queue_->metadata_size()) {
-    ALOGE(
-        "DvrReadBufferQueue::Dequeue: Invalid metadata size, expected (%zu), "
-        "but actual (%zu).",
-        consumer_queue_->metadata_size(), meta_size_bytes);
-    return -EINVAL;
-  }
-
-  size_t slot;
-  pdx::LocalHandle acquire_fence;
-  auto buffer_status = consumer_queue_->Dequeue(
-      timeout, &slot, out_meta, meta_size_bytes, &acquire_fence);
-  if (!buffer_status) {
-    ALOGE_IF(buffer_status.error() != ETIMEDOUT,
-             "dvrReadBufferQueueDequeue: Failed to dequeue buffer: %s",
-             buffer_status.GetErrorMessage().c_str());
-    return -buffer_status.error();
-  }
-
-  read_buffer->read_buffer = buffer_status.take();
-  *out_fence_fd = acquire_fence.Release();
-
-  return 0;
-}
-
 int DvrReadBufferQueue::AcquireBuffer(int timeout,
                                       DvrReadBuffer** out_read_buffer,
                                       DvrNativeBufferMetadata* out_meta,
diff --git a/libs/vr/libdvr/include/dvr/dvr_api.h b/libs/vr/libdvr/include/dvr/dvr_api.h
index 499b7c1..80ffc82 100644
--- a/libs/vr/libdvr/include/dvr/dvr_api.h
+++ b/libs/vr/libdvr/include/dvr/dvr_api.h
@@ -443,11 +443,13 @@
 struct DvrApi_v1 {
 // Defines an API entry for V1 (no version suffix).
 #define DVR_V1_API_ENTRY(name) Dvr##name##Ptr name
+#define DVR_V1_API_ENTRY_DEPRECATED(name) Dvr##name##Ptr name
 
 #include "dvr_api_entries.h"
 
 // Undefine macro definitions to play nice with Google3 style rules.
 #undef DVR_V1_API_ENTRY
+#undef DVR_V1_API_ENTRY_DEPRECATED
 };
 
 int dvrGetApi(void* api, size_t struct_size, int version);
diff --git a/libs/vr/libdvr/include/dvr/dvr_api_entries.h b/libs/vr/libdvr/include/dvr/dvr_api_entries.h
index cce8c7e..f0d8ec6 100644
--- a/libs/vr/libdvr/include/dvr/dvr_api_entries.h
+++ b/libs/vr/libdvr/include/dvr/dvr_api_entries.h
@@ -8,6 +8,10 @@
 #error Do not include this header directly.
 #endif
 
+#ifndef DVR_V1_API_ENTRY_DEPRECATED
+#error Do not include this header directly.
+#endif
+
 // Do not delete this line: BEGIN CODEGEN OUTPUT
 // Display manager client
 DVR_V1_API_ENTRY(DisplayManagerCreate);
@@ -32,42 +36,42 @@
 DVR_V1_API_ENTRY(SurfaceStateGetAttributes);
 
 // Write buffer
-DVR_V1_API_ENTRY(WriteBufferCreateEmpty);
+DVR_V1_API_ENTRY_DEPRECATED(WriteBufferCreateEmpty);
 DVR_V1_API_ENTRY(WriteBufferDestroy);
 DVR_V1_API_ENTRY(WriteBufferIsValid);
-DVR_V1_API_ENTRY(WriteBufferClear);
+DVR_V1_API_ENTRY_DEPRECATED(WriteBufferClear);
 DVR_V1_API_ENTRY(WriteBufferGetId);
 DVR_V1_API_ENTRY(WriteBufferGetAHardwareBuffer);
-DVR_V1_API_ENTRY(WriteBufferPost);
-DVR_V1_API_ENTRY(WriteBufferGain);
-DVR_V1_API_ENTRY(WriteBufferGainAsync);
-DVR_V1_API_ENTRY(WriteBufferGetNativeHandle);
+DVR_V1_API_ENTRY_DEPRECATED(WriteBufferPost);
+DVR_V1_API_ENTRY_DEPRECATED(WriteBufferGain);
+DVR_V1_API_ENTRY_DEPRECATED(WriteBufferGainAsync);
+DVR_V1_API_ENTRY_DEPRECATED(WriteBufferGetNativeHandle);
 
 // Read buffer
-DVR_V1_API_ENTRY(ReadBufferCreateEmpty);
+DVR_V1_API_ENTRY_DEPRECATED(ReadBufferCreateEmpty);
 DVR_V1_API_ENTRY(ReadBufferDestroy);
 DVR_V1_API_ENTRY(ReadBufferIsValid);
-DVR_V1_API_ENTRY(ReadBufferClear);
+DVR_V1_API_ENTRY_DEPRECATED(ReadBufferClear);
 DVR_V1_API_ENTRY(ReadBufferGetId);
 DVR_V1_API_ENTRY(ReadBufferGetAHardwareBuffer);
-DVR_V1_API_ENTRY(ReadBufferAcquire);
-DVR_V1_API_ENTRY(ReadBufferRelease);
-DVR_V1_API_ENTRY(ReadBufferReleaseAsync);
-DVR_V1_API_ENTRY(ReadBufferGetNativeHandle);
+DVR_V1_API_ENTRY_DEPRECATED(ReadBufferAcquire);
+DVR_V1_API_ENTRY_DEPRECATED(ReadBufferRelease);
+DVR_V1_API_ENTRY_DEPRECATED(ReadBufferReleaseAsync);
+DVR_V1_API_ENTRY_DEPRECATED(ReadBufferGetNativeHandle);
 
 // Buffer
 DVR_V1_API_ENTRY(BufferDestroy);
 DVR_V1_API_ENTRY(BufferGetAHardwareBuffer);
-DVR_V1_API_ENTRY(BufferGetNativeHandle);
+DVR_V1_API_ENTRY_DEPRECATED(BufferGetNativeHandle);
 DVR_V1_API_ENTRY(BufferGlobalLayoutVersionGet);
 
 // Write buffer queue
 DVR_V1_API_ENTRY(WriteBufferQueueDestroy);
 DVR_V1_API_ENTRY(WriteBufferQueueGetCapacity);
 DVR_V1_API_ENTRY(WriteBufferQueueGetId);
-DVR_V1_API_ENTRY(WriteBufferQueueGetExternalSurface);  // deprecated
+DVR_V1_API_ENTRY_DEPRECATED(WriteBufferQueueGetExternalSurface);
 DVR_V1_API_ENTRY(WriteBufferQueueCreateReadQueue);
-DVR_V1_API_ENTRY(WriteBufferQueueDequeue);
+DVR_V1_API_ENTRY_DEPRECATED(WriteBufferQueueDequeue);
 DVR_V1_API_ENTRY(WriteBufferQueueResizeBuffer);
 
 // Read buffer queue
@@ -75,7 +79,7 @@
 DVR_V1_API_ENTRY(ReadBufferQueueGetCapacity);
 DVR_V1_API_ENTRY(ReadBufferQueueGetId);
 DVR_V1_API_ENTRY(ReadBufferQueueCreateReadQueue);
-DVR_V1_API_ENTRY(ReadBufferQueueDequeue);
+DVR_V1_API_ENTRY_DEPRECATED(ReadBufferQueueDequeue);
 DVR_V1_API_ENTRY(ReadBufferQueueSetBufferAvailableCallback);
 DVR_V1_API_ENTRY(ReadBufferQueueSetBufferRemovedCallback);
 DVR_V1_API_ENTRY(ReadBufferQueueHandleEvents);
diff --git a/libs/vr/libdvr/include/dvr/dvr_buffer.h b/libs/vr/libdvr/include/dvr/dvr_buffer.h
index 935a7b2..4234844 100644
--- a/libs/vr/libdvr/include/dvr/dvr_buffer.h
+++ b/libs/vr/libdvr/include/dvr/dvr_buffer.h
@@ -14,20 +14,12 @@
 typedef struct AHardwareBuffer AHardwareBuffer;
 struct native_handle;
 
-// Creates an empty write buffer that may be filled with an acutal buffer by
-// other functions.
-void dvrWriteBufferCreateEmpty(DvrWriteBuffer** write_buffer);
-
 // Destroys the write buffer.
 void dvrWriteBufferDestroy(DvrWriteBuffer* write_buffer);
 
 // Returns 1 if the given write buffer object contains a buffer, 0 otherwise.
 int dvrWriteBufferIsValid(DvrWriteBuffer* write_buffer);
 
-// Clears the contents of the buffer object. After a call to this function
-// dvrWriteBufferIsValid on the same buffer object returns 0.
-int dvrWriteBufferClear(DvrWriteBuffer* write_buffer);
-
 // Returns the global BufferHub id of this buffer.
 int dvrWriteBufferGetId(DvrWriteBuffer* write_buffer);
 
@@ -36,34 +28,12 @@
 int dvrWriteBufferGetAHardwareBuffer(DvrWriteBuffer* write_buffer,
                                      AHardwareBuffer** hardware_buffer);
 
-// Posts the buffer, notifying any connected read buffers. Takes ownership of
-// |ready_fence_fd|.
-int dvrWriteBufferPost(DvrWriteBuffer* write_buffer, int ready_fence_fd,
-                       const void* meta, size_t meta_size_bytes);
-
-// Gains a buffer that has been released by all connected read buffers.
-int dvrWriteBufferGain(DvrWriteBuffer* write_buffer, int* release_fence_fd);
-int dvrWriteBufferGainAsync(DvrWriteBuffer* write_buffer);
-
-// TODO(eieio): Switch to return int and take an out parameter for the native
-// handle.
-const struct native_handle* dvrWriteBufferGetNativeHandle(
-    DvrWriteBuffer* write_buffer);
-
-// Creates an empty read buffer that may be filled with and actual buffer by
-// other functions.
-void dvrReadBufferCreateEmpty(DvrReadBuffer** read_buffer);
-
 // Destroys the read buffer.
 void dvrReadBufferDestroy(DvrReadBuffer* read_buffer);
 
 // Returns 1 if the given write buffer object contains a buffer, 0 otherwise.
 int dvrReadBufferIsValid(DvrReadBuffer* read_buffer);
 
-// Clears the contents of the buffer object. After a call to this function
-// dvrReadBufferIsValid on the same buffer object returns 0.
-int dvrReadBufferClear(DvrReadBuffer* read_buffer);
-
 // Returns the global BufferHub id of this buffer.
 int dvrReadBufferGetId(DvrReadBuffer* read_buffer);
 
@@ -72,21 +42,6 @@
 int dvrReadBufferGetAHardwareBuffer(DvrReadBuffer* read_buffer,
                                     AHardwareBuffer** hardware_buffer);
 
-// Acquires the read buffer after it has been posted by the write buffer it is
-// connected to.
-int dvrReadBufferAcquire(DvrReadBuffer* read_buffer, int* ready_fence_fd,
-                         void* meta, size_t meta_size_bytes);
-
-// Releases the read buffer, notifying the write buffer it is connected to.
-// Takes ownership of |release_fence_fd|.
-int dvrReadBufferRelease(DvrReadBuffer* read_buffer, int release_fence_fd);
-int dvrReadBufferReleaseAsync(DvrReadBuffer* read_buffer);
-
-// TODO(eieio): Switch to return int and take an out parameter for the native
-// handle.
-const struct native_handle* dvrReadBufferGetNativeHandle(
-    DvrReadBuffer* read_buffer);
-
 // Destroys the buffer.
 void dvrBufferDestroy(DvrBuffer* buffer);
 
@@ -98,10 +53,6 @@
 // Retrieve the shared buffer layout version defined in dvr_shared_buffers.h.
 int dvrBufferGlobalLayoutVersionGet();
 
-// TODO(eieio): Switch to return int and take an out parameter for the native
-// handle.
-const struct native_handle* dvrBufferGetNativeHandle(DvrBuffer* buffer);
-
 __END_DECLS
 
 #endif  // ANDROID_DVR_BUFFER_H_
diff --git a/libs/vr/libdvr/include/dvr/dvr_buffer_queue.h b/libs/vr/libdvr/include/dvr/dvr_buffer_queue.h
index bf695c7..ac789da 100644
--- a/libs/vr/libdvr/include/dvr/dvr_buffer_queue.h
+++ b/libs/vr/libdvr/include/dvr/dvr_buffer_queue.h
@@ -76,10 +76,6 @@
 int dvrWriteBufferQueueGetANativeWindow(DvrWriteBufferQueue* write_queue,
                                         ANativeWindow** out_window);
 
-// @deprecated Please use dvrWriteBufferQueueGetANativeWindow instead.
-int dvrWriteBufferQueueGetExternalSurface(DvrWriteBufferQueue* write_queue,
-                                          ANativeWindow** out_window);
-
 // Create a read buffer queue from an existing write buffer queue.
 //
 // @param write_queue The DvrWriteBufferQueue of interest.
@@ -89,10 +85,6 @@
 int dvrWriteBufferQueueCreateReadQueue(DvrWriteBufferQueue* write_queue,
                                        DvrReadBufferQueue** out_read_queue);
 
-// @deprecated Please use dvrWriteBufferQueueGainBuffer instead.
-int dvrWriteBufferQueueDequeue(DvrWriteBufferQueue* write_queue, int timeout,
-                               DvrWriteBuffer* out_buffer, int* out_fence_fd);
-
 // Gains a buffer to write into.
 //
 // @param write_queue The DvrWriteBufferQueue to gain buffer from.
@@ -176,11 +168,6 @@
 int dvrReadBufferQueueCreateReadQueue(DvrReadBufferQueue* read_queue,
                                       DvrReadBufferQueue** out_read_queue);
 
-// @deprecated Please use dvrReadBufferQueueAcquireBuffer instead.
-int dvrReadBufferQueueDequeue(DvrReadBufferQueue* read_queue, int timeout,
-                              DvrReadBuffer* out_buffer, int* out_fence_fd,
-                              void* out_meta, size_t meta_size_bytes);
-
 // Dequeues a buffer to read from.
 //
 // @param read_queue The DvrReadBufferQueue to acquire buffer from.
diff --git a/libs/vr/libdvr/tests/dvr_display_manager-test.cpp b/libs/vr/libdvr/tests/dvr_display_manager-test.cpp
index f83b26e..c9a5c09 100644
--- a/libs/vr/libdvr/tests/dvr_display_manager-test.cpp
+++ b/libs/vr/libdvr/tests/dvr_display_manager-test.cpp
@@ -845,10 +845,10 @@
   ASSERT_NE(nullptr, write_queue.get());
 
   DvrWriteBuffer* buffer = nullptr;
-  dvrWriteBufferCreateEmpty(&buffer);
+  DvrNativeBufferMetadata metadata;
   int fence_fd = -1;
-  int error =
-      dvrWriteBufferQueueDequeue(write_queue.get(), 1000, buffer, &fence_fd);
+  int error = dvrWriteBufferQueueGainBuffer(write_queue.get(), /*timeout=*/1000,
+                                            &buffer, &metadata, &fence_fd);
   ASSERT_EQ(0, error);
 
   AHardwareBuffer* hardware_buffer = nullptr;