Config option to disable preview audio.

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

diff --git a/src/lib/butler.cc b/src/lib/butler.cc
index 175846d632d501b11f0c3feb8d8f19ff62300f3a..32d607c5d22c080477889cbb4646776cefe845f4 100644 (file)
--- a/src/lib/butler.cc
+++ b/src/lib/butler.cc
@@ -33,6 +33,8 @@ using boost::optional;
 
 /** Video readahead in frames */
 #define VIDEO_READAHEAD 10
+/** Audio readahead in frames */
+#define AUDIO_READAHEAD (48000*5)
 
 Butler::Butler (weak_ptr<const Film> film, shared_ptr<Player> player, AudioMapping audio_mapping, int audio_channels)
        : _film (film)
@@ -41,6 +43,8 @@ Butler::Butler (weak_ptr<const Film> film, shared_ptr<Player> player, AudioMappi
        , _finished (false)
        , _audio_mapping (audio_mapping)
        , _audio_channels (audio_channels)
+       , _stop_thread (false)
+       , _disable_audio (false)
 {
        _player_video_connection = _player->Video.connect (bind (&Butler::video, this, _1, _2));
        _player_audio_connection = _player->Audio.connect (bind (&Butler::audio, this, _1, _2));
@@ -50,6 +54,7 @@ Butler::Butler (weak_ptr<const Film> film, shared_ptr<Player> player, AudioMappi
 
 Butler::~Butler ()
 {
+       _stop_thread = true;
        _thread->interrupt ();
        try {
                _thread->join ();
@@ -59,14 +64,21 @@ Butler::~Butler ()
        delete _thread;
 }
 
+bool
+Butler::should_run () const
+{
+       return (_video.size() < VIDEO_READAHEAD || _audio.size() < AUDIO_READAHEAD) && !_stop_thread && !_finished;
+}
+
 void
 Butler::thread ()
+try
 {
        while (true) {
                boost::mutex::scoped_lock lm (_mutex);
 
                /* Wait until we have something to do */
-               while (_video.size() >= VIDEO_READAHEAD && !_pending_seek_position) {
+               while (!should_run() && !_pending_seek_position) {
                        _summon.wait (lm);
                }
 
@@ -76,11 +88,11 @@ Butler::thread ()
                        _pending_seek_position = optional<DCPTime> ();
                }
 
-               /* Fill _video.  Don't try to carry on if a pending seek appears
+               /* Fill _video and _audio.  Don't try to carry on if a pending seek appears
                   while lm is unlocked, as in that state nothing will be added to
-                  _video.
+                  _video/_audio.
                */
-               while (_video.size() < VIDEO_READAHEAD && !_pending_seek_position) {
+               while (should_run() && !_pending_seek_position) {
                        lm.unlock ();
                        if (_player->pass ()) {
                                _finished = true;
@@ -91,6 +103,10 @@ Butler::thread ()
                        _arrived.notify_all ();
                }
        }
+} catch (boost::thread_interrupted) {
+       /* The butler thread is being terminated */
+} catch (...) {
+       store_current ();
 }
 
 pair<shared_ptr<PlayerVideo>, DCPTime>
@@ -103,7 +119,7 @@ Butler::get_video ()
                _arrived.wait (lm);
        }
 
-       if (_finished) {
+       if (_video.empty() && _finished) {
                return make_pair (shared_ptr<PlayerVideo>(), DCPTime());
        }
 
@@ -117,6 +133,7 @@ Butler::seek (DCPTime position, bool accurate)
 {
        boost::mutex::scoped_lock lm (_mutex);
        _video.clear ();
+       _audio.clear ();
        _finished = false;
        _pending_seek_position = position;
        _pending_seek_accurate = accurate;
@@ -140,7 +157,15 @@ Butler::video (shared_ptr<PlayerVideo> video, DCPTime time)
 void
 Butler::audio (shared_ptr<AudioBuffers> audio, DCPTime time)
 {
+       {
+               boost::mutex::scoped_lock lm (_mutex);
+               if (_pending_seek_position || _disable_audio) {
+                       /* Don't store any audio while a seek is pending, or if audio is disabled */
+                       return;
+               }
+       }
 
+       _audio.put (audio, time);
 }
 
 void
@@ -155,12 +180,22 @@ Butler::player_changed ()
 
        if (t) {
                seek (*t, true);
+       } else {
+               _video.clear ();
+               _audio.clear ();
        }
 }
 
 void
 Butler::get_audio (float* out, Frame frames)
 {
-       _audio.get (reinterpret_cast<float*> (out), _audio_channels, frames);
+       _audio.get (out, _audio_channels, frames);
        _summon.notify_all ();
 }
+
+void
+Butler::disable_audio ()
+{
+       boost::mutex::scoped_lock lm (_mutex);
+       _disable_audio = true;
+}