Fix warning.

[dcpomatic.git] / src / lib / butler.cc

diff --git a/src/lib/butler.cc b/src/lib/butler.cc
index 54c1acc4dc083cee67f3e535fe97b11d5779e6b8..910b5ea4897b612c76a458909d112b11185d67dc 100644 (file)
--- a/src/lib/butler.cc
+++ b/src/lib/butler.cc
@@ -48,6 +48,7 @@ using boost::optional;
 Butler::Butler (weak_ptr<const Film> film, shared_ptr<Player> player, AudioMapping audio_mapping, int audio_channels)
        : _film (film)
        , _player (player)
+       , _prepare_work (new boost::asio::io_service::work (_prepare_service))
        , _pending_seek_accurate (false)
        , _finished (false)
        , _died (false)
@@ -60,6 +61,13 @@ Butler::Butler (weak_ptr<const Film> film, shared_ptr<Player> player, AudioMappi
        _player_audio_connection = _player->Audio.connect (bind (&Butler::audio, this, _1));
        _player_changed_connection = _player->Changed.connect (bind (&Butler::player_changed, this));
        _thread = new boost::thread (bind (&Butler::thread, this));
+
+       /* Create some threads to do work on the PlayerVideos we are creating; at present this is used to
+          multi-thread JPEG2000 decoding.
+       */
+       for (size_t i = 0; i < boost::thread::hardware_concurrency(); ++i) {
+               _prepare_pool.create_thread (bind (&boost::asio::io_service::run, &_prepare_service));
+       }
 }
 
 Butler::~Butler ()
@@ -69,6 +77,10 @@ Butler::~Butler ()
                _stop_thread = true;
        }
 
+       _prepare_work.reset ();
+       _prepare_pool.join_all ();
+       _prepare_service.stop ();
+
        _thread->interrupt ();
        try {
                _thread->join ();
@@ -180,6 +192,16 @@ Butler::seek (DCPTime position, bool accurate)
        _summon.notify_all ();
 }
 
+void
+Butler::prepare (weak_ptr<PlayerVideo> weak_video) const
+{
+       shared_ptr<PlayerVideo> video = weak_video.lock ();
+       /* If the weak_ptr cannot be locked the video obviously no longer requires any work */
+       if (video) {
+               video->prepare ();
+       }
+}
+
 void
 Butler::video (shared_ptr<PlayerVideo> video, DCPTime time)
 {
@@ -191,6 +213,7 @@ Butler::video (shared_ptr<PlayerVideo> video, DCPTime time)
                }
        }
 
+       _prepare_service.post (bind (&Butler::prepare, this, weak_ptr<PlayerVideo>(video)));
        _video.put (video, time);
 }
 
@@ -226,11 +249,16 @@ Butler::player_changed ()
        }
 }
 
-void
+/** Try to get `frames' frames of audio and copy it into `out'.  Silence
+ *  will be filled if no audio is available.
+ *  @return true if there was a buffer underrun, otherwise false.
+ */
+bool
 Butler::get_audio (float* out, Frame frames)
 {
-       _audio.get (out, _audio_channels, frames);
+       bool const underrun = _audio.get (out, _audio_channels, frames);
        _summon.notify_all ();
+       return underrun;
 }
 
 void