Question Is there a way for Exoplayer to prepare Source faster

[mathemandy]

Hi, is there away i can prepare my source Faster?
lets say i get all 100 songs from the server , from the console i see exoplayer taking forever to prepare source as it logs this on the Console.

2019-02-14 12:47:45.938 12735-12947/ng.groove.udux W/zygote: Long monitor contention with owner DefaultHlsPlaylistTracker:MasterPlaylist (12951) at void com.google.android.exoplayer2.upstream.cache.SimpleCache.applyContentMetadataMutations(java.lang.String, com.google.android.exoplayer2.upstream.cache.ContentMetadataMutations)(SimpleCache.java:-1) waiters=0 in void com.google.android.exoplayer2.upstream.cache.SimpleCache.applyContentMetadataMutations(java.lang.String, com.google.android.exoplayer2.upstream.cache.ContentMetadataMutations) for 408ms

This is how i prepare my source

void prepareSource(Track track, ShuffleOrder order) {
        try {
            if (order != null) {
                mediaSource.setShuffleOrder(order);
            }
        } catch (Exception e) {

        }
        HlsMediaSource addedMediaSource = new
                HlsMediaSource(Uri.parse(track.getSource()), cacheDataSourceFactory(),
                2, null, null);

        if (mediaSource == null) {
            mediaSource = new ConcatenatingMediaSource();
        }
        mediaSource.addMediaSource(addedMediaSource);
    }

This is my cacheDataSourceFactory() method

    private DataSource.Factory cacheDataSourceFactory() {
        return () -> {
            byte[] secret = getUtf8Bytes("ng.groove.udux_1");
            AesCipherDataSource aesCipherDataSource = new AesCipherDataSource(secret, new FileDataSource());
            byte[] scratch = new byte[3897];

            AesCipherDataSink aesCipherDataSink = new AesCipherDataSink(secret, new CacheDataSink(UduxCache.getInstance(), Long.MAX_VALUE), scratch);

            CacheDataSource cd = new CacheDataSource(UduxCache.getInstance(), okHttpDataSourceFactory().createDataSource(), aesCipherDataSource, aesCipherDataSink,
                    CacheDataSource.FLAG_BLOCK_ON_CACHE | CacheDataSource.FLAG_IGNORE_CACHE_ON_ERROR, null);
            cd.addTransferListener(mTransferListener);
            return cd;
        };
    }

Here is the cache instance

  public static synchronized  SimpleCache getInstance() {
        if (sDownloadCache == null)
        downloadContentDirectory = new File(getDownloadDirectory(), DOWNLOAD_CONTENT_DIRECTORY);
        if ( !SimpleCache.isCacheFolderLocked(downloadContentDirectory)){
            return sDownloadCache = new SimpleCache(downloadContentDirectory,new NoOpCacheEvictor());
        }else {

            return  sDownloadCache;

        }
    }




    private static File getDownloadDirectory() {
        if (downloadDirectory == null) {
            downloadDirectory = ApplicationContext.get().getExternalFilesDir(null);
            if (downloadDirectory == null) {
                downloadDirectory = ApplicationContext.get().getFilesDir();
            }
        }
        return downloadDirectory;
    }

Is there anyway i can improve this and reduce loading time before playing song.
Thanks

[erdemguven]

Which version of ExoPlayer are you using? If it isn't the development branch, could you try and let us know if it fixes the issue.

[mathemandy]

I am using Exo Version
implementation 'com.google.android.exoplayer:exoplayer:2.9.4'

[ojw28]

I think you're seeing poor cache performance. Improving this is tracked by #4253. Closing as duplicate.

[mathemandy]

@ojw28 #4323 i looked at the issue and did not understand if i am to wait for an update to the proposed solution or try to solve that myself using the recommended discussion.
Thanks

[ojw28]

It's probably easier for you to wait until the issue is marked as fixed in this case, and then migrate to the first version of ExoPlayer that picks up the improvements (likely 2.10.0).