Audio effects: define interface between EffectModule and audio framework

This is in preparation of the addition of audio effects attached to a
specific audio device that will not be attached to a particular
ThreadBase or Effectchain.

Create an clean callback interface used by the EffectModule to interact
with the rest of the audio framework. This callback must be implemented
by the EffectModule parent (e.g an EfffectChain).

Als refactor EffectHandle enabled(), disable() and disconnect methods()
to avoid dealing with the ThreadBase directly.

Bug: 136294538
Test: make
Change-Id: I9160f88f7fbb0447b5e679260bf0401d3af591d2
diff --git a/services/audioflinger/Effects.cpp b/services/audioflinger/Effects.cpp
index f27c6ad..2a83fd3 100644
--- a/services/audioflinger/Effects.cpp
+++ b/services/audioflinger/Effects.cpp
@@ -64,14 +64,13 @@
 #undef LOG_TAG
 #define LOG_TAG "AudioFlinger::EffectModule"
 
-AudioFlinger::EffectModule::EffectModule(ThreadBase *thread,
-                                        const wp<AudioFlinger::EffectChain>& chain,
+AudioFlinger::EffectModule::EffectModule(const sp<AudioFlinger::EffectCallbackInterface>& callback,
                                         effect_descriptor_t *desc,
                                         int id,
                                         audio_session_t sessionId,
                                         bool pinned)
     : mPinned(pinned),
-      mThread(thread), mChain(chain), mId(id), mSessionId(sessionId),
+      mCallback(callback), mId(id), mSessionId(sessionId),
       mDescriptor(*desc),
       // clear mConfig to ensure consistent initial value of buffer framecount
       // in case buffers are associated by setInBuffer() or setOutBuffer()
@@ -81,8 +80,7 @@
       mMaxDisableWaitCnt(1), // set by configure(), should be >= 1
       mDisableWaitCnt(0),    // set by process() and updateState()
       mSuspended(false),
-      mOffloaded(false),
-      mAudioFlinger(thread->mAudioFlinger)
+      mOffloaded(false)
 #ifdef FLOAT_EFFECT_CHAIN
       , mSupportsFloat(false)
 #endif
@@ -91,16 +89,8 @@
     int lStatus;
 
     // create effect engine from effect factory
-    mStatus = -ENODEV;
-    sp<AudioFlinger> audioFlinger = mAudioFlinger.promote();
-    if (audioFlinger != 0) {
-        sp<EffectsFactoryHalInterface> effectsFactory = audioFlinger->getEffectsFactory();
-        if (effectsFactory != 0) {
-            mStatus = effectsFactory->createEffect(
-                &desc->uuid, sessionId, thread->id(), AUDIO_PORT_HANDLE_NONE, &mEffectInterface);
-        }
-    }
-
+    mStatus = callback->createEffectHal(
+            &desc->uuid, sessionId, AUDIO_PORT_HANDLE_NONE, &mEffectInterface);
     if (mStatus != NO_ERROR) {
         return;
     }
@@ -110,7 +100,7 @@
         goto Error;
     }
 
-    setOffloaded(thread->type() == ThreadBase::OFFLOAD, thread->id());
+    setOffloaded(callback->isOffload(), callback->io());
     ALOGV("Constructor success name %s, Interface %p", mDescriptor.name, mEffectInterface.get());
 
     return;
@@ -188,14 +178,8 @@
             doRegister = true;
             mPolicyRegistered = mHandles.size() > 0;
             if (mPolicyRegistered) {
-              sp <EffectChain> chain = mChain.promote();
-              sp <ThreadBase> thread = mThread.promote();
-
-              if (thread == nullptr || chain == nullptr) {
-                    return INVALID_OPERATION;
-                }
-                io = thread->id();
-                strategy = chain->strategy();
+                io = mCallback->io();
+                strategy = mCallback->strategy();
             }
         }
         // enable effect when registered according to enable state requested by controlling handle
@@ -292,15 +276,16 @@
 ssize_t AudioFlinger::EffectModule::disconnectHandle(EffectHandle *handle, bool unpinIfLast)
 {
     ALOGV("disconnect() %p handle %p", this, handle);
+    if (mCallback->disconnectEffectHandle(handle, unpinIfLast)) {
+        return mHandles.size();
+    }
+
     Mutex::Autolock _l(mLock);
     ssize_t numHandles = removeHandle_l(handle);
     if ((numHandles == 0) && (!mPinned || unpinIfLast)) {
-        sp<AudioFlinger> af = mAudioFlinger.promote();
-        if (af != 0) {
-            mLock.unlock();
-            af->updateOrphanEffectChains(this);
-            mLock.lock();
-        }
+        mLock.unlock();
+        mCallback->updateOrphanEffectChains(this);
+        mLock.lock();
     }
     return numHandles;
 }
@@ -542,8 +527,7 @@
                 mConfig.inputCfg.buffer.raw != mConfig.outputCfg.buffer.raw) {
         // If an insert effect is idle and input buffer is different from output buffer,
         // accumulate input onto output
-        sp<EffectChain> chain = mChain.promote();
-        if (chain.get() != nullptr && chain->activeTrackCnt() != 0) {
+        if (mCallback->activeTrackCnt() != 0) {
             // similar handling with data_bypass above.
             if (mConfig.outputCfg.accessMode == EFFECT_BUFFER_ACCESS_ACCUMULATE) {
                 accumulateInputToOutput();
@@ -566,7 +550,6 @@
 {
     ALOGVV("configure() started");
     status_t status;
-    sp<ThreadBase> thread;
     uint32_t size;
     audio_channel_mask_t channelMask;
 
@@ -575,17 +558,11 @@
         goto exit;
     }
 
-    thread = mThread.promote();
-    if (thread == 0) {
-        status = DEAD_OBJECT;
-        goto exit;
-    }
-
     // TODO: handle configuration of effects replacing track process
     // TODO: handle configuration of input (record) SW effects above the HAL,
     // similar to output EFFECT_FLAG_TYPE_INSERT/REPLACE,
     // in which case input channel masks should be used here.
-    channelMask = thread->channelMask();
+    channelMask = mCallback->channelMask();
     mConfig.inputCfg.channels = channelMask;
     mConfig.outputCfg.channels = channelMask;
 
@@ -622,11 +599,11 @@
     mConfig.outputCfg.format = EFFECT_BUFFER_FORMAT;
 
     // Don't use sample rate for thread if effect isn't offloadable.
-    if ((thread->type() == ThreadBase::OFFLOAD) && !isOffloaded()) {
+    if (mCallback->isOffload() && !isOffloaded()) {
         mConfig.inputCfg.samplingRate = DEFAULT_OUTPUT_SAMPLE_RATE;
         ALOGV("Overriding effect input as 48kHz");
     } else {
-        mConfig.inputCfg.samplingRate = thread->sampleRate();
+        mConfig.inputCfg.samplingRate = mCallback->sampleRate();
     }
     mConfig.outputCfg.samplingRate = mConfig.inputCfg.samplingRate;
     mConfig.inputCfg.bufferProvider.cookie = NULL;
@@ -652,11 +629,13 @@
     }
     mConfig.inputCfg.mask = EFFECT_CONFIG_ALL;
     mConfig.outputCfg.mask = EFFECT_CONFIG_ALL;
-    mConfig.inputCfg.buffer.frameCount = thread->frameCount();
+    mConfig.inputCfg.buffer.frameCount = mCallback->frameCount();
     mConfig.outputCfg.buffer.frameCount = mConfig.inputCfg.buffer.frameCount;
 
-    ALOGV("configure() %p thread %p buffer %p framecount %zu",
-            this, thread.get(), mConfig.inputCfg.buffer.raw, mConfig.inputCfg.buffer.frameCount);
+    ALOGV("configure() %p chain %p buffer %p framecount %zu",
+            this, mCallback->chain().promote() != nullptr ? mCallback->chain().promote().get() :
+                                                            nullptr,
+              mConfig.inputCfg.buffer.raw, mConfig.inputCfg.buffer.frameCount);
 
     status_t cmdStatus;
     size = sizeof(int);
@@ -671,7 +650,7 @@
 
 #ifdef MULTICHANNEL_EFFECT_CHAIN
     if (status != NO_ERROR &&
-            thread->isOutput() &&
+            mCallback->isOutput() &&
             (mConfig.inputCfg.channels != AUDIO_CHANNEL_OUT_STEREO
                     || mConfig.outputCfg.channels != AUDIO_CHANNEL_OUT_STEREO)) {
         // Older effects may require exact STEREO position mask.
@@ -738,11 +717,7 @@
             size = sizeof(int);
             *(int32_t *)p->data = VISUALIZER_PARAM_LATENCY;
 
-            uint32_t latency = 0;
-            PlaybackThread *pbt = thread->mAudioFlinger->checkPlaybackThread_l(thread->mId);
-            if (pbt != NULL) {
-                latency = pbt->latency_l();
-            }
+            uint32_t latency = mCallback->latency();
 
             *((int32_t *)p->data + 1)= latency;
             mEffectInterface->command(EFFECT_CMD_SET_PARAM,
@@ -789,31 +764,20 @@
 {
     if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_PRE_PROC ||
          (mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_POST_PROC) {
-        sp<ThreadBase> thread = mThread.promote();
-        if (thread != 0) {
-            sp<StreamHalInterface> stream = thread->stream();
-            if (stream != 0) {
-                status_t result = stream->addEffect(mEffectInterface);
-                ALOGE_IF(result != OK, "Error when adding effect: %d", result);
-            }
-        }
+        (void)mCallback->addEffectToHal(mEffectInterface);
     }
 }
 
 // start() must be called with PlaybackThread::mLock or EffectChain::mLock held
 status_t AudioFlinger::EffectModule::start()
 {
-    sp<EffectChain> chain;
     status_t status;
     {
         Mutex::Autolock _l(mLock);
         status = start_l();
-        if (status == NO_ERROR) {
-            chain = mChain.promote();
-        }
     }
-    if (chain != 0) {
-        chain->resetVolume_l();
+    if (status == NO_ERROR) {
+        mCallback->resetVolume();
     }
     return status;
 }
@@ -860,11 +824,10 @@
     uint32_t size = sizeof(status_t);
 
     if (isVolumeControl() && isOffloadedOrDirect()) {
-        sp<EffectChain>chain = mChain.promote();
         // We have the EffectChain and EffectModule lock, permit a reentrant call to setVolume:
         // resetVolume_l --> setVolume_l --> EffectModule::setVolume
         mSetVolumeReentrantTid = gettid();
-        chain->resetVolume_l();
+        mCallback->resetVolume();
         mSetVolumeReentrantTid = INVALID_PID;
     }
 
@@ -877,7 +840,7 @@
         status = cmdStatus;
     }
     if (status == NO_ERROR) {
-        status = remove_effect_from_hal_l();
+        status = removeEffectFromHal_l();
     }
     return status;
 }
@@ -886,25 +849,18 @@
 void AudioFlinger::EffectModule::release_l()
 {
     if (mEffectInterface != 0) {
-        remove_effect_from_hal_l();
+        removeEffectFromHal_l();
         // release effect engine
         mEffectInterface->close();
         mEffectInterface.clear();
     }
 }
 
-status_t AudioFlinger::EffectModule::remove_effect_from_hal_l()
+status_t AudioFlinger::EffectModule::removeEffectFromHal_l()
 {
     if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_PRE_PROC ||
              (mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_POST_PROC) {
-        sp<ThreadBase> thread = mThread.promote();
-        if (thread != 0) {
-            sp<StreamHalInterface> stream = thread->stream();
-            if (stream != 0) {
-                status_t result = stream->removeEffect(mEffectInterface);
-                ALOGE_IF(result != OK, "Error when removing effect: %d", result);
-            }
-        }
+        mCallback->removeEffectFromHal(mEffectInterface);
     }
     return NO_ERROR;
 }
@@ -994,10 +950,29 @@
     return status;
 }
 
-status_t AudioFlinger::EffectModule::setEnabled(bool enabled)
+void AudioFlinger::EffectModule::checkSuspendOnEffectEnabled(bool enabled, bool threadLocked) {
+    mCallback->checkSuspendOnEffectEnabled(this, enabled, threadLocked);
+}
+
+status_t AudioFlinger::EffectModule::setEnabled(bool enabled, bool fromHandle)
 {
-    Mutex::Autolock _l(mLock);
-    return setEnabled_l(enabled);
+    status_t status;
+    {
+        Mutex::Autolock _l(mLock);
+        status = setEnabled_l(enabled);
+    }
+    if (fromHandle) {
+        if (enabled) {
+            if (status != NO_ERROR) {
+                mCallback->checkSuspendOnEffectEnabled(this, false, false /*threadLocked*/);
+            } else {
+                mCallback->onEffectEnable(this);
+            }
+        } else {
+            mCallback->onEffectDisable(this);
+        }
+    }
+    return status;
 }
 
 // must be called with EffectModule::mLock held
@@ -1080,7 +1055,7 @@
 
 bool AudioFlinger::EffectModule::isOffloadedOrDirect() const
 {
-    return (mThreadType == ThreadBase::OFFLOAD || mThreadType == ThreadBase::DIRECT);
+    return mCallback->isOffloadOrDirect();
 }
 
 bool AudioFlinger::EffectModule::isVolumeControlEnabled() const
@@ -1124,9 +1099,7 @@
                 || size > mInConversionBuffer->getSize())) {
             mInConversionBuffer.clear();
             ALOGV("%s: allocating mInConversionBuffer %zu", __func__, size);
-            sp<AudioFlinger> audioFlinger = mAudioFlinger.promote();
-            LOG_ALWAYS_FATAL_IF(audioFlinger == nullptr, "EM could not retrieved audioFlinger");
-            (void)audioFlinger->mEffectsFactoryHal->allocateBuffer(size, &mInConversionBuffer);
+            (void)mCallback->allocateHalBuffer(size, &mInConversionBuffer);
         }
         if (mInConversionBuffer.get() != nullptr) {
             mInConversionBuffer->setFrameCount(inFrameCount);
@@ -1170,9 +1143,7 @@
                 || size > mOutConversionBuffer->getSize())) {
             mOutConversionBuffer.clear();
             ALOGV("%s: allocating mOutConversionBuffer %zu", __func__, size);
-            sp<AudioFlinger> audioFlinger = mAudioFlinger.promote();
-            LOG_ALWAYS_FATAL_IF(audioFlinger == nullptr, "EM could not retrieved audioFlinger");
-            (void)audioFlinger->mEffectsFactoryHal->allocateBuffer(size, &mOutConversionBuffer);
+            (void)mCallback->allocateHalBuffer(size, &mOutConversionBuffer);
         }
         if (mOutConversionBuffer.get() != nullptr) {
             mOutConversionBuffer->setFrameCount(outFrameCount);
@@ -1220,14 +1191,10 @@
 
 void AudioFlinger::EffectChain::setVolumeForOutput_l(uint32_t left, uint32_t right)
 {
-    sp<ThreadBase> thread = mThread.promote();
-    if (thread != 0 &&
-        (thread->type() == ThreadBase::OFFLOAD || thread->type() == ThreadBase::DIRECT) &&
-        !isNonOffloadableEnabled_l()) {
-        PlaybackThread *t = (PlaybackThread *)thread.get();
+    if (mEffectCallback->isOffloadOrDirect() && !isNonOffloadableEnabled_l()) {
         float vol_l = (float)left / (1 << 24);
         float vol_r = (float)right / (1 << 24);
-        t->setVolumeForOutput_l(vol_l, vol_r);
+        mEffectCallback->setVolumeForOutput(vol_l, vol_r);
     }
 }
 
@@ -1646,38 +1613,16 @@
         return status;
     }
 
-    sp<ThreadBase> thread = effect->thread().promote();
-    if (thread != 0) {
-        thread->checkSuspendOnEffectEnabled(effect, true, effect->sessionId());
-    }
+    effect->checkSuspendOnEffectEnabled(true, false /*threadLocked*/);
 
     // checkSuspendOnEffectEnabled() can suspend this same effect when enabled
     if (effect->suspended()) {
         return NO_ERROR;
     }
 
-    status = effect->setEnabled(true);
+    status = effect->setEnabled(true, true /*fromHandle*/);
     if (status != NO_ERROR) {
-        if (thread != 0) {
-            thread->checkSuspendOnEffectEnabled(effect, false, effect->sessionId());
-        }
         mEnabled = false;
-    } else {
-        if (thread != 0) {
-            if (thread->type() == ThreadBase::OFFLOAD || thread->type() == ThreadBase::MMAP) {
-                Mutex::Autolock _l(thread->mLock);
-                thread->broadcast_l();
-            }
-            if (!effect->isOffloadable()) {
-                if (thread->type() == ThreadBase::OFFLOAD) {
-                    PlaybackThread *t = (PlaybackThread *)thread.get();
-                    t->invalidateTracks(AUDIO_STREAM_MUSIC);
-                }
-                if (effect->sessionId() == AUDIO_SESSION_OUTPUT_MIX) {
-                    thread->mAudioFlinger->onNonOffloadableGlobalEffectEnable();
-                }
-            }
-        }
     }
     return status;
 }
@@ -1705,17 +1650,7 @@
         return NO_ERROR;
     }
 
-    status_t status = effect->setEnabled(false);
-
-    sp<ThreadBase> thread = effect->thread().promote();
-    if (thread != 0) {
-        thread->checkSuspendOnEffectEnabled(effect, false, effect->sessionId());
-        if (thread->type() == ThreadBase::OFFLOAD || thread->type() == ThreadBase::MMAP) {
-            Mutex::Autolock _l(thread->mLock);
-            thread->broadcast_l();
-        }
-    }
-
+    status_t status = effect->setEnabled(false, true /*fromHandle*/);
     return status;
 }
 
@@ -1739,10 +1674,7 @@
     {
         sp<EffectModule> effect = mEffect.promote();
         if (effect != 0) {
-            sp<ThreadBase> thread = effect->thread().promote();
-            if (thread != 0) {
-                thread->disconnectEffectHandle(this, unpinIfLast);
-            } else if (effect->disconnectHandle(this, unpinIfLast) > 0) {
+            if (effect->disconnectHandle(this, unpinIfLast) > 0) {
                 ALOGW("%s Effect handle %p disconnected after thread destruction",
                     __func__, this);
             }
@@ -1962,12 +1894,13 @@
 
 AudioFlinger::EffectChain::EffectChain(ThreadBase *thread,
                                         audio_session_t sessionId)
-    : mThread(thread), mSessionId(sessionId), mActiveTrackCnt(0), mTrackCnt(0), mTailBufferCount(0),
+    : mSessionId(sessionId), mActiveTrackCnt(0), mTrackCnt(0), mTailBufferCount(0),
       mVolumeCtrlIdx(-1), mLeftVolume(UINT_MAX), mRightVolume(UINT_MAX),
-      mNewLeftVolume(UINT_MAX), mNewRightVolume(UINT_MAX)
+      mNewLeftVolume(UINT_MAX), mNewRightVolume(UINT_MAX),
+      mEffectCallback(new EffectCallback(this, thread, thread->mAudioFlinger.get()))
 {
     mStrategy = AudioSystem::getStrategyForStream(AUDIO_STREAM_MUSIC);
-    if (thread == NULL) {
+    if (thread == nullptr) {
         return;
     }
     mMaxTailBuffers = ((kProcessTailDurationMs * thread->sampleRate()) / 1000) /
@@ -2033,40 +1966,29 @@
 void AudioFlinger::EffectChain::clearInputBuffer()
 {
     Mutex::Autolock _l(mLock);
-    sp<ThreadBase> thread = mThread.promote();
-    if (thread == 0) {
-        ALOGW("clearInputBuffer(): cannot promote mixer thread");
-        return;
-    }
-    clearInputBuffer_l(thread);
+    clearInputBuffer_l();
 }
 
 // Must be called with EffectChain::mLock locked
-void AudioFlinger::EffectChain::clearInputBuffer_l(const sp<ThreadBase>& thread)
+void AudioFlinger::EffectChain::clearInputBuffer_l()
 {
     if (mInBuffer == NULL) {
         return;
     }
     const size_t frameSize =
-            audio_bytes_per_sample(EFFECT_BUFFER_FORMAT) * thread->channelCount();
+            audio_bytes_per_sample(EFFECT_BUFFER_FORMAT) * mEffectCallback->channelCount();
 
-    memset(mInBuffer->audioBuffer()->raw, 0, thread->frameCount() * frameSize);
+    memset(mInBuffer->audioBuffer()->raw, 0, mEffectCallback->frameCount() * frameSize);
     mInBuffer->commit();
 }
 
 // Must be called with EffectChain::mLock locked
 void AudioFlinger::EffectChain::process_l()
 {
-    sp<ThreadBase> thread = mThread.promote();
-    if (thread == 0) {
-        ALOGW("process_l(): cannot promote mixer thread");
-        return;
-    }
     // never process effects when:
     // - on an OFFLOAD thread
     // - no more tracks are on the session and the effect tail has been rendered
-    bool doProcess = (thread->type() != ThreadBase::OFFLOAD)
-                  && (thread->type() != ThreadBase::MMAP);
+    bool doProcess = !mEffectCallback->isOffloadOrMmap();
     if (!audio_is_global_session(mSessionId)) {
         bool tracksOnSession = (trackCnt() != 0);
 
@@ -2078,7 +2000,7 @@
             // if no track is active and the effect tail has not been rendered,
             // the input buffer must be cleared here as the mixer process will not do it
             if (tracksOnSession || mTailBufferCount > 0) {
-                clearInputBuffer_l(thread);
+                clearInputBuffer_l();
                 if (mTailBufferCount > 0) {
                     mTailBufferCount--;
                 }
@@ -2114,14 +2036,13 @@
 
 // createEffect_l() must be called with ThreadBase::mLock held
 status_t AudioFlinger::EffectChain::createEffect_l(sp<EffectModule>& effect,
-                                                   ThreadBase *thread,
                                                    effect_descriptor_t *desc,
                                                    int id,
                                                    audio_session_t sessionId,
                                                    bool pinned)
 {
     Mutex::Autolock _l(mLock);
-    effect = new EffectModule(thread, this, desc, id, sessionId, pinned);
+    effect = new EffectModule(mEffectCallback, desc, id, sessionId, pinned);
     status_t lStatus = effect->status();
     if (lStatus == NO_ERROR) {
         lStatus = addEffect_ll(effect);
@@ -2144,12 +2065,7 @@
     effect_descriptor_t desc = effect->desc();
     uint32_t insertPref = desc.flags & EFFECT_FLAG_INSERT_MASK;
 
-    effect->setChain(this);
-    sp<ThreadBase> thread = mThread.promote();
-    if (thread == 0) {
-        return NO_INIT;
-    }
-    effect->setThread(thread);
+    effect->setCallback(mEffectCallback);
 
     if ((desc.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_AUXILIARY) {
         // Auxiliary effects are inserted at the beginning of mEffects vector as
@@ -2160,13 +2076,13 @@
         // 32 bit format. This is to avoid saturation in AudoMixer
         // accumulation stage. Saturation is done in EffectModule::process() before
         // calling the process in effect engine
-        size_t numSamples = thread->frameCount();
+        size_t numSamples = mEffectCallback->frameCount();
         sp<EffectBufferHalInterface> halBuffer;
 #ifdef FLOAT_EFFECT_CHAIN
-        status_t result = thread->mAudioFlinger->mEffectsFactoryHal->allocateBuffer(
+        status_t result = mEffectCallback->allocateHalBuffer(
                 numSamples * sizeof(float), &halBuffer);
 #else
-        status_t result = thread->mAudioFlinger->mEffectsFactoryHal->allocateBuffer(
+        status_t result = mEffectCallback->allocateHalBuffer(
                 numSamples * sizeof(int32_t), &halBuffer);
 #endif
         if (result != OK) return result;
@@ -2484,7 +2400,7 @@
             if (effect != 0) {
                 desc->mEffect = effect;
                 effect->setSuspended(true);
-                effect->setEnabled(false);
+                effect->setEnabled(false, false /*fromHandle*/);
             }
         }
     } else {
@@ -2642,7 +2558,7 @@
         // if effect is requested to suspended but was not yet enabled, suspend it now.
         if (desc->mEffect == 0) {
             desc->mEffect = effect;
-            effect->setEnabled(false);
+            effect->setEnabled(false, false /*fromHandle*/);
             effect->setSuspended(true);
         }
     } else {
@@ -2677,10 +2593,7 @@
 void AudioFlinger::EffectChain::setThread(const sp<ThreadBase>& thread)
 {
     Mutex::Autolock _l(mLock);
-    mThread = thread;
-    for (size_t i = 0; i < mEffects.size(); i++) {
-        mEffects[i]->setThread(thread);
-    }
+    mEffectCallback->setThread(thread.get());
 }
 
 void AudioFlinger::EffectChain::checkOutputFlagCompatibility(audio_output_flags_t *flags) const
@@ -2740,4 +2653,224 @@
     return true;
 }
 
+// EffectCallbackInterface implementation
+status_t AudioFlinger::EffectChain::EffectCallback::createEffectHal(
+        const effect_uuid_t *pEffectUuid, int32_t sessionId, int32_t deviceId,
+        sp<EffectHalInterface> *effect) {
+    status_t status = NO_INIT;
+    sp<AudioFlinger> af = mAudioFlinger.promote();
+    if (af == nullptr) {
+        return status;
+    }
+    sp<EffectsFactoryHalInterface> effectsFactory = af->getEffectsFactory();
+    if (effectsFactory != 0) {
+        status = effectsFactory->createEffect(pEffectUuid, sessionId, io(), deviceId, effect);
+    }
+    return status;
+}
+
+bool AudioFlinger::EffectChain::EffectCallback::updateOrphanEffectChains(
+        const sp<AudioFlinger::EffectModule>& effect) {
+    sp<AudioFlinger> af = mAudioFlinger.promote();
+    if (af == nullptr) {
+        return false;
+    }
+    return af->updateOrphanEffectChains(effect);
+}
+
+status_t AudioFlinger::EffectChain::EffectCallback::allocateHalBuffer(
+        size_t size, sp<EffectBufferHalInterface>* buffer) {
+    sp<AudioFlinger> af = mAudioFlinger.promote();
+    LOG_ALWAYS_FATAL_IF(af == nullptr, "allocateHalBuffer() could not retrieved audio flinger");
+    return af->mEffectsFactoryHal->allocateBuffer(size, buffer);
+}
+
+status_t AudioFlinger::EffectChain::EffectCallback::addEffectToHal(
+        sp<EffectHalInterface> effect) {
+    status_t result = NO_INIT;
+    sp<ThreadBase> t = mThread.promote();
+    if (t == nullptr) {
+        return result;
+    }
+    sp <StreamHalInterface> st = t->stream();
+    if (st == nullptr) {
+        return result;
+    }
+    result = st->addEffect(effect);
+    ALOGE_IF(result != OK, "Error when adding effect: %d", result);
+    return result;
+}
+
+status_t AudioFlinger::EffectChain::EffectCallback::removeEffectFromHal(
+        sp<EffectHalInterface> effect) {
+    status_t result = NO_INIT;
+    sp<ThreadBase> t = mThread.promote();
+    if (t == nullptr) {
+        return result;
+    }
+    sp <StreamHalInterface> st = t->stream();
+    if (st == nullptr) {
+        return result;
+    }
+    result = st->removeEffect(effect);
+    ALOGE_IF(result != OK, "Error when removing effect: %d", result);
+    return result;
+}
+
+audio_io_handle_t AudioFlinger::EffectChain::EffectCallback::io() const {
+    sp<ThreadBase> t = mThread.promote();
+    if (t == nullptr) {
+        return AUDIO_IO_HANDLE_NONE;
+    }
+    return t->id();
+}
+
+bool AudioFlinger::EffectChain::EffectCallback::isOutput() const {
+    sp<ThreadBase> t = mThread.promote();
+    if (t == nullptr) {
+        return true;
+    }
+    return t->isOutput();
+}
+
+bool AudioFlinger::EffectChain::EffectCallback::isOffload() const {
+    sp<ThreadBase> t = mThread.promote();
+    if (t == nullptr) {
+        return false;
+    }
+    return t->type() == ThreadBase::OFFLOAD;
+}
+
+bool AudioFlinger::EffectChain::EffectCallback::isOffloadOrDirect() const {
+    sp<ThreadBase> t = mThread.promote();
+    if (t == nullptr) {
+        return false;
+    }
+    return t->type() == ThreadBase::OFFLOAD || t->type() == ThreadBase::DIRECT;
+}
+
+bool AudioFlinger::EffectChain::EffectCallback::isOffloadOrMmap() const {
+    sp<ThreadBase> t = mThread.promote();
+    if (t == nullptr) {
+        return false;
+    }
+    return t->type() == ThreadBase::OFFLOAD || t->type() == ThreadBase::MMAP;
+}
+
+uint32_t AudioFlinger::EffectChain::EffectCallback::sampleRate() const {
+    sp<ThreadBase> t = mThread.promote();
+    if (t == nullptr) {
+        return 0;
+    }
+    return t->sampleRate();
+}
+
+audio_channel_mask_t AudioFlinger::EffectChain::EffectCallback::channelMask() const {
+    sp<ThreadBase> t = mThread.promote();
+    if (t == nullptr) {
+        return AUDIO_CHANNEL_NONE;
+    }
+    return t->channelMask();
+}
+
+uint32_t AudioFlinger::EffectChain::EffectCallback::channelCount() const {
+    sp<ThreadBase> t = mThread.promote();
+    if (t == nullptr) {
+        return 0;
+    }
+    return t->channelCount();
+}
+
+size_t AudioFlinger::EffectChain::EffectCallback::frameCount() const {
+    sp<ThreadBase> t = mThread.promote();
+    if (t == nullptr) {
+        return 0;
+    }
+    return t->frameCount();
+}
+
+uint32_t AudioFlinger::EffectChain::EffectCallback::latency() const {
+    sp<ThreadBase> t = mThread.promote();
+    if (t == nullptr) {
+        return 0;
+    }
+    return t->latency_l();
+}
+
+void AudioFlinger::EffectChain::EffectCallback::setVolumeForOutput(float left, float right) const {
+    sp<ThreadBase> t = mThread.promote();
+    if (t == nullptr) {
+        return;
+    }
+    t->setVolumeForOutput_l(left, right);
+}
+
+void AudioFlinger::EffectChain::EffectCallback::checkSuspendOnEffectEnabled(
+        const sp<EffectModule>& effect, bool enabled, bool threadLocked) {
+    sp<ThreadBase> t = mThread.promote();
+    if (t == nullptr) {
+        return;
+    }
+    t->checkSuspendOnEffectEnabled(enabled, effect->sessionId(), threadLocked);
+
+    sp<EffectChain> c = mChain.promote();
+    if (c == nullptr) {
+        return;
+    }
+    c->checkSuspendOnEffectEnabled(effect, enabled);
+}
+
+void AudioFlinger::EffectChain::EffectCallback::onEffectEnable(const sp<EffectModule>& effect) {
+    sp<ThreadBase> t = mThread.promote();
+    if (t == nullptr) {
+        return;
+    }
+    t->onEffectEnable(effect);
+}
+
+void AudioFlinger::EffectChain::EffectCallback::onEffectDisable(const sp<EffectModule>& effect) {
+    checkSuspendOnEffectEnabled(effect, false, false /*threadLocked*/);
+
+    sp<ThreadBase> t = mThread.promote();
+    if (t == nullptr) {
+        return;
+    }
+    t->onEffectDisable();
+}
+
+bool AudioFlinger::EffectChain::EffectCallback::disconnectEffectHandle(EffectHandle *handle,
+                                                      bool unpinIfLast) {
+    sp<ThreadBase> t = mThread.promote();
+    if (t == nullptr) {
+        return false;
+    }
+    t->disconnectEffectHandle(handle, unpinIfLast);
+    return true;
+}
+
+void AudioFlinger::EffectChain::EffectCallback::resetVolume() {
+    sp<EffectChain> c = mChain.promote();
+    if (c == nullptr) {
+        return;
+    }
+    c->resetVolume_l();
+
+}
+
+uint32_t AudioFlinger::EffectChain::EffectCallback::strategy() const {
+    sp<EffectChain> c = mChain.promote();
+    if (c == nullptr) {
+        return PRODUCT_STRATEGY_NONE;
+    }
+    return c->strategy();
+}
+
+int32_t AudioFlinger::EffectChain::EffectCallback::activeTrackCnt() const {
+    sp<EffectChain> c = mChain.promote();
+    if (c == nullptr) {
+        return 0;
+    }
+    return c->activeTrackCnt();
+}
+
 } // namespace android