diff --git a/media/libaaudio/examples/write_sine/src/write_sine.cpp b/media/libaaudio/examples/write_sine/src/write_sine.cpp
index 0125c0f..87fb40b 100644
--- a/media/libaaudio/examples/write_sine/src/write_sine.cpp
+++ b/media/libaaudio/examples/write_sine/src/write_sine.cpp
@@ -16,11 +16,14 @@
 
 // Play sine waves using AAudio.
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
 #include <aaudio/AAudio.h>
 #include <aaudio/AAudioTesting.h>
+#include <asm/fcntl.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
 #include "AAudioExampleUtils.h"
 #include "AAudioSimplePlayer.h"
 #include "AAudioArgsParser.h"
@@ -48,6 +51,8 @@
     float   *floatData = nullptr;
     int16_t *shortData = nullptr;
 
+    int      testFd = -1;
+
     // Make printf print immediately so that debug info is not stuck
     // in a buffer if we hang or crash.
     setvbuf(stdout, nullptr, _IONBF, (size_t) 0);
@@ -95,6 +100,9 @@
         goto finish;
     }
 
+    testFd = open("/data/aaudio_temp.raw", O_CREAT | O_RDWR, S_IRWXU);
+    printf("testFd = %d, pid = %d\n", testFd, getpid());
+
     // Start the stream.
     printf("call player.start()\n");
     result = player.start();
@@ -176,7 +184,17 @@
     }
 
 finish:
+    printf("testFd = %d, fcntl before aaudio close returns 0x%08X\n",
+           testFd, fcntl(testFd, F_GETFD));
     player.close();
+    printf("testFd = %d, fcntl after aaudio close returns 0x%08X\n",
+           testFd, fcntl(testFd, F_GETFD));
+    if (::close(testFd) != 0) {
+        printf("ERROR SharedMemoryParcelable::close() of testFd = %d, errno = %s\n",
+               testFd, strerror(errno));
+    }
+    printf("testFd = %d, fcntl after close() returns 0x%08X\n", testFd, fcntl(testFd, F_GETFD));
+
     delete[] floatData;
     delete[] shortData;
     printf("exiting - AAudio result = %d = %s\n", result, AAudio_convertResultToText(result));
diff --git a/media/libaaudio/src/binding/AudioEndpointParcelable.cpp b/media/libaaudio/src/binding/AudioEndpointParcelable.cpp
index d05abb0..1a97555 100644
--- a/media/libaaudio/src/binding/AudioEndpointParcelable.cpp
+++ b/media/libaaudio/src/binding/AudioEndpointParcelable.cpp
@@ -28,6 +28,7 @@
 #include "binding/RingBufferParcelable.h"
 #include "binding/AudioEndpointParcelable.h"
 
+using android::base::unique_fd;
 using android::NO_ERROR;
 using android::status_t;
 using android::Parcel;
@@ -49,7 +50,8 @@
  * Add the file descriptor to the table.
  * @return index in table or negative error
  */
-int32_t AudioEndpointParcelable::addFileDescriptor(int fd, int32_t sizeInBytes) {
+int32_t AudioEndpointParcelable::addFileDescriptor(const unique_fd& fd,
+                                                   int32_t sizeInBytes) {
     if (mNumSharedMemories >= MAX_SHARED_MEMORIES) {
         return AAUDIO_ERROR_OUT_OF_RANGE;
     }
diff --git a/media/libaaudio/src/binding/AudioEndpointParcelable.h b/media/libaaudio/src/binding/AudioEndpointParcelable.h
index 993075c..aa8573f 100644
--- a/media/libaaudio/src/binding/AudioEndpointParcelable.h
+++ b/media/libaaudio/src/binding/AudioEndpointParcelable.h
@@ -20,6 +20,7 @@
 #include <stdint.h>
 
 //#include <sys/mman.h>
+#include <android-base/unique_fd.h>
 #include <binder/Parcel.h>
 #include <binder/Parcelable.h>
 
@@ -47,7 +48,7 @@
      * Add the file descriptor to the table.
      * @return index in table or negative error
      */
-    int32_t addFileDescriptor(int fd, int32_t sizeInBytes);
+    int32_t addFileDescriptor(const android::base::unique_fd& fd, int32_t sizeInBytes);
 
     virtual status_t writeToParcel(Parcel* parcel) const override;
 
diff --git a/media/libaaudio/src/binding/SharedMemoryParcelable.cpp b/media/libaaudio/src/binding/SharedMemoryParcelable.cpp
index b582b99..90217ab 100644
--- a/media/libaaudio/src/binding/SharedMemoryParcelable.cpp
+++ b/media/libaaudio/src/binding/SharedMemoryParcelable.cpp
@@ -24,11 +24,13 @@
 #include <sys/mman.h>
 #include <aaudio/AAudio.h>
 
+#include <android-base/unique_fd.h>
 #include <binder/Parcelable.h>
 #include <utility/AAudioUtilities.h>
 
 #include "binding/SharedMemoryParcelable.h"
 
+using android::base::unique_fd;
 using android::NO_ERROR;
 using android::status_t;
 using android::Parcel;
@@ -39,17 +41,19 @@
 SharedMemoryParcelable::SharedMemoryParcelable() {}
 SharedMemoryParcelable::~SharedMemoryParcelable() {};
 
-void SharedMemoryParcelable::setup(int fd, int32_t sizeInBytes) {
-    mFd = fd;
+void SharedMemoryParcelable::setup(const unique_fd& fd, int32_t sizeInBytes) {
+    mFd.reset(dup(fd.get())); // store a duplicate fd
+    ALOGV("SharedMemoryParcelable::setup(%d -> %d, %d) this = %p\n",
+          fd.get(), mFd.get(), sizeInBytes, this);
     mSizeInBytes = sizeInBytes;
-
 }
 
 status_t SharedMemoryParcelable::writeToParcel(Parcel* parcel) const {
     status_t status = parcel->writeInt32(mSizeInBytes);
     if (status != NO_ERROR) return status;
     if (mSizeInBytes > 0) {
-        status = parcel->writeDupFileDescriptor(mFd);
+        ALOGV("SharedMemoryParcelable::writeToParcel() mFd = %d, this = %p\n", mFd.get(), this);
+        status = parcel->writeUniqueFileDescriptor(mFd);
         ALOGE_IF(status != NO_ERROR, "SharedMemoryParcelable writeDupFileDescriptor failed : %d",
                  status);
     }
@@ -62,15 +66,16 @@
         return status;
     }
     if (mSizeInBytes > 0) {
-        // Keep the original FD until you are done with the mFd.
-        // If you close it in here then it will prevent mFd from working.
-        int originalFd = parcel->readFileDescriptor();
-        ALOGV("SharedMemoryParcelable::readFromParcel() LEAK? originalFd = %d\n", originalFd);
-        mFd = fcntl(originalFd, F_DUPFD_CLOEXEC, 0);
-        ALOGV("SharedMemoryParcelable::readFromParcel() LEAK? mFd = %d\n", mFd);
-        if (mFd == -1) {
-            status = -errno;
-            ALOGE("SharedMemoryParcelable readFromParcel fcntl() failed : %d", status);
+        // The Parcel owns the file descriptor and will close it later.
+        unique_fd mmapFd;
+        status = parcel->readUniqueFileDescriptor(&mmapFd);
+        if (status != NO_ERROR) {
+            ALOGE("SharedMemoryParcelable::readFromParcel() readUniqueFileDescriptor() failed : %d",
+                  status);
+        } else {
+            // Resolve the memory now while we still have the FD from the Parcel.
+            // Closing the FD will not affect the shared memory once mmap() has been called.
+            status = AAudioConvert_androidToAAudioResult(resolveSharedMemory(mmapFd));
         }
     }
     return status;
@@ -85,44 +90,50 @@
         }
         mResolvedAddress = MMAP_UNRESOLVED_ADDRESS;
     }
-    if (mFd != -1) {
-        ALOGV("SharedMemoryParcelable::close() LEAK? mFd = %d\n", mFd);
-        if(::close(mFd) < 0) {
-            int err = errno;
-            ALOGE("SharedMemoryParcelable close failed for fd = %d, errno = %d (%s)",
-                  mFd, err, strerror(err));
-        }
-        mFd = -1;
+    return AAUDIO_OK;
+}
+
+aaudio_result_t SharedMemoryParcelable::resolveSharedMemory(const unique_fd& fd) {
+    mResolvedAddress = (uint8_t *) mmap(0, mSizeInBytes, PROT_READ | PROT_WRITE,
+                                        MAP_SHARED, fd.get(), 0);
+    if (mResolvedAddress == MMAP_UNRESOLVED_ADDRESS) {
+        ALOGE("SharedMemoryParcelable mmap() failed for fd = %d, errno = %s",
+              fd.get(), strerror(errno));
+        return AAUDIO_ERROR_INTERNAL;
     }
     return AAUDIO_OK;
 }
 
 aaudio_result_t SharedMemoryParcelable::resolve(int32_t offsetInBytes, int32_t sizeInBytes,
                                               void **regionAddressPtr) {
-
     if (offsetInBytes < 0) {
         ALOGE("SharedMemoryParcelable illegal offsetInBytes = %d", offsetInBytes);
         return AAUDIO_ERROR_OUT_OF_RANGE;
     } else if ((offsetInBytes + sizeInBytes) > mSizeInBytes) {
         ALOGE("SharedMemoryParcelable out of range, offsetInBytes = %d, "
-              "sizeInBytes = %d, mSizeInBytes = %d",
+                      "sizeInBytes = %d, mSizeInBytes = %d",
               offsetInBytes, sizeInBytes, mSizeInBytes);
         return AAUDIO_ERROR_OUT_OF_RANGE;
     }
+
+    aaudio_result_t result = AAUDIO_OK;
+
     if (mResolvedAddress == MMAP_UNRESOLVED_ADDRESS) {
-        mResolvedAddress = (uint8_t *) mmap(0, mSizeInBytes, PROT_READ|PROT_WRITE,
-                                          MAP_SHARED, mFd, 0);
-        if (mResolvedAddress == MMAP_UNRESOLVED_ADDRESS) {
-            ALOGE("SharedMemoryParcelable mmap failed for fd = %d, errno = %s",
-                  mFd, strerror(errno));
-            return AAUDIO_ERROR_INTERNAL;
+        if (mFd.get() != -1) {
+            result = resolveSharedMemory(mFd);
+        } else {
+            ALOGE("SharedMemoryParcelable has no file descriptor for shared memory.");
+            result = AAUDIO_ERROR_INTERNAL;
         }
     }
-    *regionAddressPtr = mResolvedAddress + offsetInBytes;
-    ALOGV("SharedMemoryParcelable mResolvedAddress = %p", mResolvedAddress);
-    ALOGV("SharedMemoryParcelable offset by %d, *regionAddressPtr = %p",
-          offsetInBytes, *regionAddressPtr);
-    return AAUDIO_OK;
+
+    if (result == AAUDIO_OK && mResolvedAddress != MMAP_UNRESOLVED_ADDRESS) {
+        *regionAddressPtr = mResolvedAddress + offsetInBytes;
+        ALOGV("SharedMemoryParcelable mResolvedAddress = %p", mResolvedAddress);
+        ALOGV("SharedMemoryParcelable offset by %d, *regionAddressPtr = %p",
+              offsetInBytes, *regionAddressPtr);
+    }
+    return result;
 }
 
 int32_t SharedMemoryParcelable::getSizeInBytes() {
@@ -134,17 +145,11 @@
         ALOGE("SharedMemoryParcelable invalid mSizeInBytes = %d", mSizeInBytes);
         return AAUDIO_ERROR_OUT_OF_RANGE;
     }
-    if (mSizeInBytes > 0) {
-        if (mFd == -1) {
-            ALOGE("SharedMemoryParcelable uninitialized mFd = %d", mFd);
-            return AAUDIO_ERROR_INTERNAL;
-        }
-    }
     return AAUDIO_OK;
 }
 
 void SharedMemoryParcelable::dump() {
-    ALOGD("SharedMemoryParcelable mFd = %d", mFd);
+    ALOGD("SharedMemoryParcelable mFd = %d", mFd.get());
     ALOGD("SharedMemoryParcelable mSizeInBytes = %d", mSizeInBytes);
     ALOGD("SharedMemoryParcelable mResolvedAddress = %p", mResolvedAddress);
 }
diff --git a/media/libaaudio/src/binding/SharedMemoryParcelable.h b/media/libaaudio/src/binding/SharedMemoryParcelable.h
index c5107d3..2a634e0 100644
--- a/media/libaaudio/src/binding/SharedMemoryParcelable.h
+++ b/media/libaaudio/src/binding/SharedMemoryParcelable.h
@@ -18,15 +18,12 @@
 #define ANDROID_AAUDIO_SHARED_MEMORY_PARCELABLE_H
 
 #include <stdint.h>
-
 #include <sys/mman.h>
+
+#include <android-base/unique_fd.h>
 #include <binder/Parcel.h>
 #include <binder/Parcelable.h>
 
-using android::status_t;
-using android::Parcel;
-using android::Parcelable;
-
 namespace aaudio {
 
 // Arbitrary limits for sanity checks. TODO remove after debugging.
@@ -37,17 +34,24 @@
 /**
  * This is a parcelable description of a shared memory referenced by a file descriptor.
  * It may be divided into several regions.
+ * The memory can be shared using Binder or simply shared between threads.
  */
-class SharedMemoryParcelable : public Parcelable {
+class SharedMemoryParcelable : public android::Parcelable {
 public:
     SharedMemoryParcelable();
     virtual ~SharedMemoryParcelable();
 
-    void setup(int fd, int32_t sizeInBytes);
+    /**
+     * Make a dup() of the fd and store it for later use.
+     *
+     * @param fd
+     * @param sizeInBytes
+     */
+    void setup(const android::base::unique_fd& fd, int32_t sizeInBytes);
 
-    virtual status_t writeToParcel(Parcel* parcel) const override;
+    virtual android::status_t writeToParcel(android::Parcel* parcel) const override;
 
-    virtual status_t readFromParcel(const Parcel* parcel) override;
+    virtual android::status_t readFromParcel(const android::Parcel* parcel) override;
 
     // mmap() shared memory
     aaudio_result_t resolve(int32_t offsetInBytes, int32_t sizeInBytes, void **regionAddressPtr);
@@ -55,8 +59,6 @@
     // munmap() any mapped memory
     aaudio_result_t close();
 
-    bool isFileDescriptorSafe();
-
     int32_t getSizeInBytes();
 
     aaudio_result_t validate();
@@ -67,9 +69,11 @@
 
 #define MMAP_UNRESOLVED_ADDRESS    reinterpret_cast<uint8_t*>(MAP_FAILED)
 
-    int      mFd = -1;
-    int32_t  mSizeInBytes = 0;
-    uint8_t *mResolvedAddress = MMAP_UNRESOLVED_ADDRESS;
+    aaudio_result_t resolveSharedMemory(const android::base::unique_fd& fd);
+
+    android::base::unique_fd   mFd;
+    int32_t     mSizeInBytes = 0;
+    uint8_t    *mResolvedAddress = MMAP_UNRESOLVED_ADDRESS;
 };
 
 } /* namespace aaudio */
diff --git a/media/libaaudio/tests/test_marshalling.cpp b/media/libaaudio/tests/test_marshalling.cpp
index 79beed6..c51fbce 100644
--- a/media/libaaudio/tests/test_marshalling.cpp
+++ b/media/libaaudio/tests/test_marshalling.cpp
@@ -19,6 +19,7 @@
 #include <stdlib.h>
 #include <math.h>
 
+#include <android-base/unique_fd.h>
 #include <binder/Parcel.h>
 #include <binder/Parcelable.h>
 #include <cutils/ashmem.h>
@@ -28,6 +29,7 @@
 #include <aaudio/AAudio.h>
 #include <binding/AudioEndpointParcelable.h>
 
+using android::base::unique_fd;
 using namespace android;
 using namespace aaudio;
 
@@ -48,7 +50,7 @@
     SharedMemoryParcelable sharedMemoryA;
     SharedMemoryParcelable sharedMemoryB;
     const size_t memSizeBytes = 840;
-    int fd = ashmem_create_region("TestMarshalling", memSizeBytes);
+    unique_fd fd(ashmem_create_region("TestMarshalling", memSizeBytes));
     ASSERT_LE(0, fd);
     sharedMemoryA.setup(fd, memSizeBytes);
     void *region1;
@@ -81,7 +83,7 @@
     SharedRegionParcelable sharedRegionA;
     SharedRegionParcelable sharedRegionB;
     const size_t memSizeBytes = 840;
-    int fd = ashmem_create_region("TestMarshalling", memSizeBytes);
+    unique_fd fd(ashmem_create_region("TestMarshalling", memSizeBytes));
     ASSERT_LE(0, fd);
     sharedMemories[0].setup(fd, memSizeBytes);
     int32_t regionOffset1 = 32;
@@ -119,7 +121,7 @@
     const int32_t counterSizeBytes = sizeof(int64_t);
     const size_t memSizeBytes = dataSizeBytes + (2 * counterSizeBytes);
 
-    int fd = ashmem_create_region("TestMarshalling", memSizeBytes);
+    unique_fd fd(ashmem_create_region("TestMarshalling Z", memSizeBytes));
     ASSERT_LE(0, fd);
     sharedMemories[0].setup(fd, memSizeBytes);
 
diff --git a/services/oboeservice/AAudioServiceStreamMMAP.cpp b/services/oboeservice/AAudioServiceStreamMMAP.cpp
index ff02c0f..08dd680 100644
--- a/services/oboeservice/AAudioServiceStreamMMAP.cpp
+++ b/services/oboeservice/AAudioServiceStreamMMAP.cpp
@@ -31,6 +31,7 @@
 #include "SharedMemoryProxy.h"
 #include "utility/AAudioUtilities.h"
 
+using android::base::unique_fd;
 using namespace android;
 using namespace aaudio;
 
@@ -64,11 +65,6 @@
         AudioClock::sleepForNanos(100 * AAUDIO_NANOS_PER_MILLISECOND);
     }
 
-    if (mAudioDataFileDescriptor != -1) {
-        ::close(mAudioDataFileDescriptor);
-        mAudioDataFileDescriptor = -1;
-    }
-
     return AAudioServiceStreamBase::close();
 }
 
@@ -184,7 +180,13 @@
                            ? audio_channel_count_from_out_mask(config.channel_mask)
                            : audio_channel_count_from_in_mask(config.channel_mask);
 
-    mAudioDataFileDescriptor = mMmapBufferinfo.shared_memory_fd;
+    // AAudio creates a copy of this FD and retains ownership of the copy.
+    // Assume that AudioFlinger will close the original shared_memory_fd.
+    mAudioDataFileDescriptor.reset(dup(mMmapBufferinfo.shared_memory_fd));
+    if (mAudioDataFileDescriptor.get() == -1) {
+        ALOGE("AAudioServiceStreamMMAP::open() - could not dup shared_memory_fd");
+        return AAUDIO_ERROR_INTERNAL; // TODO review
+    }
     mFramesPerBurst = mMmapBufferinfo.burst_size_frames;
     mAudioFormat = AAudioConvert_androidToAAudioDataFormat(config.format);
     mSampleRate = config.sample_rate;
diff --git a/services/oboeservice/AAudioServiceStreamMMAP.h b/services/oboeservice/AAudioServiceStreamMMAP.h
index 533e5a8..b69dc46 100644
--- a/services/oboeservice/AAudioServiceStreamMMAP.h
+++ b/services/oboeservice/AAudioServiceStreamMMAP.h
@@ -19,6 +19,7 @@
 
 #include <atomic>
 
+#include <android-base/unique_fd.h>
 #include <media/audiohal/StreamHalInterface.h>
 #include <media/MmapStreamCallback.h>
 #include <media/MmapStreamInterface.h>
@@ -33,6 +34,7 @@
 #include "TimestampScheduler.h"
 #include "utility/MonotonicCounter.h"
 
+
 namespace aaudio {
 
     /**
@@ -131,7 +133,6 @@
     MonotonicCounter                    mFramesWritten;
     MonotonicCounter                    mFramesRead;
     int32_t                             mPreviousFrameCounter = 0;   // from HAL
-    int                                 mAudioDataFileDescriptor = -1;
 
     // Interface to the AudioFlinger MMAP support.
     android::sp<android::MmapStreamInterface> mMmapStream;
@@ -140,6 +141,7 @@
     audio_port_handle_t                       mDeviceId = AUDIO_PORT_HANDLE_NONE;
     android::AudioClient                      mServiceClient;
     bool                                      mInService = false;
+    android::base::unique_fd                  mAudioDataFileDescriptor;
 };
 
 } // namespace aaudio
diff --git a/services/oboeservice/SharedRingBuffer.cpp b/services/oboeservice/SharedRingBuffer.cpp
index 6b3fb4c..83b25b3 100644
--- a/services/oboeservice/SharedRingBuffer.cpp
+++ b/services/oboeservice/SharedRingBuffer.cpp
@@ -35,11 +35,6 @@
         munmap(mSharedMemory, mSharedMemorySizeInBytes);
         mSharedMemory = nullptr;
     }
-    if (mFileDescriptor != -1) {
-        ALOGV("SharedRingBuffer: LEAK? close(mFileDescriptor = %d)\n", mFileDescriptor);
-        close(mFileDescriptor);
-        mFileDescriptor = -1;
-    }
 }
 
 aaudio_result_t SharedRingBuffer::allocate(fifo_frames_t   bytesPerFrame,
@@ -49,17 +44,17 @@
     // Create shared memory large enough to hold the data and the read and write counters.
     mDataMemorySizeInBytes = bytesPerFrame * capacityInFrames;
     mSharedMemorySizeInBytes = mDataMemorySizeInBytes + (2 * (sizeof(fifo_counter_t)));
-    mFileDescriptor = ashmem_create_region("AAudioSharedRingBuffer", mSharedMemorySizeInBytes);
-    ALOGV("SharedRingBuffer::allocate() LEAK? mFileDescriptor = %d\n", mFileDescriptor);
-    if (mFileDescriptor < 0) {
+    mFileDescriptor.reset(ashmem_create_region("AAudioSharedRingBuffer", mSharedMemorySizeInBytes));
+    if (mFileDescriptor.get() == -1) {
         ALOGE("SharedRingBuffer::allocate() ashmem_create_region() failed %d", errno);
         return AAUDIO_ERROR_INTERNAL;
     }
+    ALOGV("SharedRingBuffer::allocate() mFileDescriptor = %d\n", mFileDescriptor.get());
 
-    int err = ashmem_set_prot_region(mFileDescriptor, PROT_READ|PROT_WRITE); // TODO error handling?
+    int err = ashmem_set_prot_region(mFileDescriptor.get(), PROT_READ|PROT_WRITE); // TODO error handling?
     if (err < 0) {
         ALOGE("SharedRingBuffer::allocate() ashmem_set_prot_region() failed %d", errno);
-        close(mFileDescriptor);
+        mFileDescriptor.reset();
         return AAUDIO_ERROR_INTERNAL; // TODO convert errno to a better AAUDIO_ERROR;
     }
 
@@ -67,10 +62,10 @@
     mSharedMemory = (uint8_t *) mmap(0, mSharedMemorySizeInBytes,
                          PROT_READ|PROT_WRITE,
                          MAP_SHARED,
-                         mFileDescriptor, 0);
+                         mFileDescriptor.get(), 0);
     if (mSharedMemory == MAP_FAILED) {
         ALOGE("SharedRingBuffer::allocate() mmap() failed %d", errno);
-        close(mFileDescriptor);
+        mFileDescriptor.reset();
         return AAUDIO_ERROR_INTERNAL; // TODO convert errno to a better AAUDIO_ERROR;
     }
 
diff --git a/services/oboeservice/SharedRingBuffer.h b/services/oboeservice/SharedRingBuffer.h
index a2c3766..79169bc 100644
--- a/services/oboeservice/SharedRingBuffer.h
+++ b/services/oboeservice/SharedRingBuffer.h
@@ -17,6 +17,7 @@
 #ifndef AAUDIO_SHARED_RINGBUFFER_H
 #define AAUDIO_SHARED_RINGBUFFER_H
 
+#include <android-base/unique_fd.h>
 #include <stdint.h>
 #include <cutils/ashmem.h>
 #include <sys/mman.h>
@@ -51,12 +52,12 @@
     }
 
 private:
-    int                    mFileDescriptor = -1;
-    android::FifoBuffer   *mFifoBuffer = nullptr;
-    uint8_t               *mSharedMemory = nullptr;
-    int32_t                mSharedMemorySizeInBytes = 0;
-    int32_t                mDataMemorySizeInBytes = 0;
-    android::fifo_frames_t mCapacityInFrames = 0;
+    android::base::unique_fd  mFileDescriptor;
+    android::FifoBuffer      *mFifoBuffer = nullptr;
+    uint8_t                  *mSharedMemory = nullptr;
+    int32_t                   mSharedMemorySizeInBytes = 0;
+    int32_t                   mDataMemorySizeInBytes = 0;
+    android::fifo_frames_t    mCapacityInFrames = 0;
 };
 
 } /* namespace aaudio */