BBQ: Clean up acquire states on BQ disconnect

    ALOGE("[%s](f:%u,a:%u) " x, mName.c_str(), mNumFrameAvailable, mNumAcquired, ##__VA_ARGS__)

void BLASTBufferItemConsumer::onDisconnect() {

    {

        Mutex::Autolock lock(mMutex);

        mPreviouslyConnected = mCurrentlyConnected;

        mCurrentlyConnected = false;

        mFrameEventHistory.onDisconnect();

    }

    {

        std::scoped_lock lock(mBufferQueueMutex);

        if (mBLASTBufferQueue != nullptr) {

            mBLASTBufferQueue->onProducerDisconnect();

        }

    }

}

void BLASTBufferItemConsumer::addAndGetFrameTimestamps(const NewFrameEventsEntry* newTimestamps,

                                                       FrameEventHistoryDelta* outDelta) {

    Mutex::Autolock lock(mMutex);

    }

    SurfaceComposerClient::Transaction t;

    const bool setBackpressureFlag = !SurfaceControl::isSameSurface(mSurfaceControl, surface);

    bool setBackpressureFlag = false;

    if (!SurfaceControl::isSameSurface(mSurfaceControl, surface)) {

        mSurfaceControlSwapCount++;

        setBackpressureFlag = true;

    }

    bool applyTransaction = false;

    // Always update the native object even though they might have the same layer handle, so we can

    std::unique_lock _lock{mMutex};

    BQA_LOGV("releaseBufferCallback %s", id.to_string().c_str());

    const auto it = mFreedBuffers.find(id);

    if (it != mFreedBuffers.end()) {

        mFreedBuffers.erase(it);

        BQA_LOGV("releaseBufferCallback ignoring freed buffer %s", id.to_string().c_str());

        return;

    }

    if (mFreedBuffers.size() != 0 && mLogMissingReleaseCallback) {

        BQA_LOGD("Unexpected out of order buffer release. mFreedBuffer count=%d",

                 static_cast<uint32_t>(mFreedBuffers.size()));

        mLogMissingReleaseCallback = false;

    }

    // Calculate how many buffers we need to hold before we release them back

    // to the buffer queue. This will prevent higher latency when we are running

    // on a lower refresh rate than the max supported. We only do that for EGL

void BLASTBufferQueue::flushAndWaitForFreeBuffer(std::unique_lock<std::mutex>& lock) {

    if (mWaitForTransactionCallback && mNumFrameAvailable > 0) {

        if ((mSurfaceControlSwapCount > mProducerDisconnectCount) && mLogScSwap) {

            BQA_LOGD("Expected producer disconnect sc swap count=%d bq disconnect count=%d",

                     mSurfaceControlSwapCount, mProducerDisconnectCount);

            mLogScSwap = false;

        }

        // We are waiting on a previous sync's transaction callback so allow another sync

        // transaction to proceed.

        //

    return mLastAcquiredFrameNumber;

}

// When the producer disconnects, all buffers in the queue will be freed. So clean up the bbq

// acquire state and handle any pending release callbacks. If we do get a release callback for a

// pending buffer for a disconnected queue, we cannot release the buffer back to the queue. So track

// these separately and drop the release callbacks as they come.

// Transaction callbacks are still expected to come in the order they were submitted regardless of

// buffer queue state. So we can continue to handles the pending transactions and transaction

// complete callbacks. When the queue is reconnected, the queue will increment the framenumbers

// starting from the last queued framenumber.

void BLASTBufferQueue::onProducerDisconnect() {

    BQA_LOGV("onProducerDisconnect");

    std::scoped_lock _lock{mMutex};

    // reset counts since the queue has been disconnected and all buffers have been freed.

    mNumFrameAvailable = 0;

    mNumAcquired = 0;

    // Track submitted buffers in a different container so we can handle any pending release buffer

    // callbacks without affecting the BBQ acquire state.

    mFreedBuffers.insert(mSubmitted.begin(), mSubmitted.end());

    mSubmitted.clear();

    mPendingRelease.clear();

    mProducerDisconnectCount++;

    mCallbackCV.notify_all();

    mLogMissingReleaseCallback = true;

    mLogScSwap = true;

}

} // namespace android

    uint32_t getLastTransformHint() const;

    uint64_t getLastAcquiredFrameNum();

    void onProducerDisconnect();

    virtual ~BLASTBufferQueue();

private:

    std::unordered_map<ReleaseCallbackId, BufferItem, ReleaseBufferCallbackIdHash> mSubmitted

            GUARDED_BY(mMutex);

    // Keep a reference to the submitted buffers that were freed so we can drop the buffer quietly

    // when we get the release callback from flinger. This can happen if the client had disconnected

    // from the queue.

    std::unordered_map<ReleaseCallbackId, BufferItem, ReleaseBufferCallbackIdHash> mFreedBuffers

            GUARDED_BY(mMutex);

    // Keep a queue of the released buffers instead of immediately releasing

    // the buffers back to the buffer queue. This would be controlled by SF

    // setting the max acquired buffer count.

    // Flag to determine if syncTransaction should only acquire a single buffer and then clear or

    // continue to acquire buffers until explicitly cleared

    bool mAcquireSingleBuffer GUARDED_BY(mMutex) = true;

    bool mLogScSwap = true;

    bool mLogMissingReleaseCallback = true;

    uint32_t mSurfaceControlSwapCount = 0;

    uint32_t mProducerDisconnectCount = 0;

};

} // namespace android

                                 nsecs_t desiredPresentTime, bool isAutoTimestamp,

                                 std::optional<nsecs_t> dequeueTime,

                                 const FrameTimelineInfo& info) {

    ATRACE_CALL();

    ATRACE_NAME(mSetBufferTraceTag.c_str());

    const std::shared_ptr<renderengine::ExternalTexture>& buffer =

            getBufferFromBufferData(bufferData);

    static constexpr int kPendingClassificationMaxSurfaceFrames = 25;

    const std::string mBlastTransactionName{"BufferTX - " + mName};

    const std::string mSetBufferTraceTag{"setBuffer - " + mName};

    // This integer is incremented everytime a buffer arrives at the server for this layer,

    // and decremented when a buffer is dropped or latched. When changed the integer is exported

    // to systrace with ATRACE_INT and mBlastTransactionName. This way when debugging perf it is