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Commit 18a4b1c3 authored by jiabin's avatar jiabin Committed by Jiabin Huang
Browse files

Release AudioTrackCallback when the track is removed. 

The AudioTrackCallback is cached as a strong pointer in PlaybackThread.
Remove the callback when the corresponding track is removed to avoid
memory leak.

Bug: 168675247
Test: repo steps in the bug
Change-Id: I09d78ca31c43db4d017f9e8c540628bcb6c44727
parent 84d711ca

services/audioflinger/Threads.cpp

+7 −3
Original line number Diff line number Diff line
@@ -2385,7 +2385,7 @@ sp<AudioFlinger::PlaybackThread::Track> AudioFlinger::PlaybackThread::createTrac 
        {

            Mutex::Autolock _atCbL(mAudioTrackCbLock);

            if (callback.get() != nullptr) {

                mAudioTrackCallbacks.emplace(callback);

                mAudioTrackCallbacks.emplace(track, callback);

            }

        }
@@ -2619,6 +2619,10 @@ void AudioFlinger::PlaybackThread::removeTrack_l(const sp<Track>& track) 
    mLocalLog.log("removeTrack_l (%p) %s", track.get(), result.string());



    mTracks.remove(track);

    {

        Mutex::Autolock _atCbL(mAudioTrackCbLock);

        mAudioTrackCallbacks.erase(track);

    }

    if (track->isFastTrack()) {

        int index = track->mFastIndex;

        ALOG_ASSERT(0 < index && index < (int)FastMixerState::sMaxFastTracks);
@@ -2714,8 +2718,8 @@ void AudioFlinger::PlaybackThread::onCodecFormatChanged( 
                    audio_utils::metadata::byteStringFromData(metadata);

            std::vector metadataVec(metaDataStr.begin(), metaDataStr.end());

            Mutex::Autolock _l(mAudioTrackCbLock);

            for (const auto& callback : mAudioTrackCallbacks) {

                callback->onCodecFormatChanged(metadataVec);

            for (const auto& callbackPair : mAudioTrackCallbacks) {

                callbackPair.second->onCodecFormatChanged(metadataVec);

            }

    }).detach();

}

services/audioflinger/Threads.h

+1 −1
Original line number Diff line number Diff line
@@ -1219,7 +1219,7 @@ private: 


    Mutex                                    mAudioTrackCbLock;

    // Record of IAudioTrackCallback

    std::set<sp<media::IAudioTrackCallback>> mAudioTrackCallbacks;

    std::map<sp<Track>, sp<media::IAudioTrackCallback>> mAudioTrackCallbacks;



private:

    // The HAL output sink is treated as non-blocking, but current implementation is blocking