diff --git a/media/libaudioclient/PlayerBase.cpp b/media/libaudioclient/PlayerBase.cpp
new file mode 100644
index 0000000..0ec69db
--- /dev/null
+++ b/media/libaudioclient/PlayerBase.cpp
@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <binder/IServiceManager.h>
+#include <media/PlayerBase.h>
+
+#define max(a, b) ((a) > (b) ? (a) : (b))
+#define min(a, b) ((a) < (b) ? (a) : (b))
+
+namespace android {
+
+//--------------------------------------------------------------------------------------------------
+PlayerBase::PlayerBase() : BnPlayer(),
+        mPanMultiplierL(1.0f), mPanMultiplierR(1.0f),
+        mVolumeMultiplierL(1.0f), mVolumeMultiplierR(1.0f),
+        mPIId(PLAYER_PIID_INVALID), mLastReportedEvent(PLAYER_STATE_UNKNOWN)
+{
+    ALOGD("PlayerBase::PlayerBase()");
+    // use checkService() to avoid blocking if audio service is not up yet
+    sp<IBinder> binder = defaultServiceManager()->checkService(String16("audio"));
+    if (binder == 0) {
+        ALOGE("PlayerBase(): binding to audio service failed, service up?");
+    } else {
+        mAudioManager = interface_cast<IAudioManager>(binder);
+    }
+}
+
+
+PlayerBase::~PlayerBase() {
+    ALOGD("PlayerBase::~PlayerBase()");
+    baseDestroy();
+}
+
+void PlayerBase::init(player_type_t playerType, audio_usage_t usage) {
+    if (mAudioManager == 0) {
+                ALOGE("AudioPlayer realize: no audio service, player will not be registered");
+    } else {
+        mPIId = mAudioManager->trackPlayer(playerType, usage, AUDIO_CONTENT_TYPE_UNKNOWN, this);
+    }
+}
+
+void PlayerBase::baseDestroy() {
+    serviceReleasePlayer();
+    if (mAudioManager != 0) {
+        mAudioManager.clear();
+    }
+}
+
+//------------------------------------------------------------------------------
+void PlayerBase::servicePlayerEvent(player_state_t event) {
+    if (mAudioManager != 0) {
+        // only report state change
+        Mutex::Autolock _l(mPlayerStateLock);
+        if (event != mLastReportedEvent
+                && mPIId != PLAYER_PIID_INVALID) {
+            mLastReportedEvent = event;
+            mAudioManager->playerEvent(mPIId, event);
+        }
+    }
+}
+
+void PlayerBase::serviceReleasePlayer() {
+    if (mAudioManager != 0
+            && mPIId != PLAYER_PIID_INVALID) {
+        mAudioManager->releasePlayer(mPIId);
+    }
+}
+
+//FIXME temporary method while some AudioTrack state is outside of this class
+void PlayerBase::reportEvent(player_state_t event) {
+    servicePlayerEvent(event);
+}
+
+//------------------------------------------------------------------------------
+// Implementation of IPlayer
+void PlayerBase::start() {
+    if (playerStart() == NO_ERROR) {
+        ALOGD("PlayerBase::start() from IPlayer");
+        servicePlayerEvent(PLAYER_STATE_STARTED);
+    } else {
+        ALOGD("PlayerBase::start() no AudioTrack to start from IPlayer");
+    }
+}
+
+void PlayerBase::pause() {
+    if (playerPause() == NO_ERROR) {
+        ALOGD("PlayerBase::pause() from IPlayer");
+        servicePlayerEvent(PLAYER_STATE_PAUSED);
+    } else {
+        ALOGD("PlayerBase::pause() no AudioTrack to pause from IPlayer");
+    }
+}
+
+
+void PlayerBase::stop() {
+    if (playerStop() == NO_ERROR) {
+        ALOGD("PlayerBase::stop() from IPlayer");
+        servicePlayerEvent(PLAYER_STATE_STOPPED);
+    } else {
+        ALOGD("PlayerBase::stop() no AudioTrack to stop from IPlayer");
+    }
+}
+
+void PlayerBase::setVolume(float vol) {
+    {
+        Mutex::Autolock _l(mSettingsLock);
+        mVolumeMultiplierL = vol;
+        mVolumeMultiplierR = vol;
+    }
+    if (playerSetVolume() == NO_ERROR) {
+        ALOGD("PlayerBase::setVolume() from IPlayer");
+    } else {
+        ALOGD("PlayerBase::setVolume() no AudioTrack for volume control from IPlayer");
+    }
+}
+
+void PlayerBase::setPan(float pan) {
+    {
+        Mutex::Autolock _l(mSettingsLock);
+        pan = min(max(-1.0f, pan), 1.0f);
+        if (pan >= 0.0f) {
+            mPanMultiplierL = 1.0f - pan;
+            mPanMultiplierR = 1.0f;
+        } else {
+            mPanMultiplierL = 1.0f;
+            mPanMultiplierR = 1.0f + pan;
+        }
+    }
+    if (playerSetVolume() == NO_ERROR) {
+        ALOGD("PlayerBase::setPan() from IPlayer");
+    } else {
+        ALOGD("PlayerBase::setPan() no AudioTrack for volume control from IPlayer");
+    }
+}
+
+void PlayerBase::setStartDelayMs(int32_t delayMs __unused) {
+    ALOGW("setStartDelay() is not supported");
+}
+
+void PlayerBase::applyVolumeShaper(
+        const sp<VolumeShaper::Configuration>& configuration  __unused,
+        const sp<VolumeShaper::Operation>& operation __unused) {
+    ALOGW("applyVolumeShaper() is not supported");
+}
+
+status_t PlayerBase::onTransact(
+    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
+{
+    return BnPlayer::onTransact(code, data, reply, flags);
+}
+
+} // namespace android