Throw exceptions when things in the butler get really out of hand.

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

diff --git a/src/lib/butler.cc b/src/lib/butler.cc
index ea0950afbcccd916ce8e2b79ff9a6797a54502d1..223f8d579b34cc4ffbc0b713191009c2039c6f9e 100644 (file)
--- a/src/lib/butler.cc
+++ b/src/lib/butler.cc
@@ -23,12 +23,14 @@
 #include "util.h"
 #include "log.h"
 #include "compose.hpp"
+#include "exceptions.h"
 #include <boost/weak_ptr.hpp>
 #include <boost/shared_ptr.hpp>
 
 using std::cout;
 using std::pair;
 using std::make_pair;
+using std::string;
 using boost::weak_ptr;
 using boost::shared_ptr;
 using boost::bind;
@@ -37,11 +39,11 @@ using boost::optional;
 /** Minimum video readahead in frames */
 #define MINIMUM_VIDEO_READAHEAD 10
 /** Maximum video readahead in frames; should never be reached unless there are bugs in Player */
-#define MAXIMUM_VIDEO_READAHEAD 240
+#define MAXIMUM_VIDEO_READAHEAD 24
 /** Minimum audio readahead in frames */
-#define MINIMUM_AUDIO_READAHEAD (48000*5)
+#define MINIMUM_AUDIO_READAHEAD (48000 * MINIMUM_VIDEO_READAHEAD / 24)
 /** Minimum audio readahead in frames; should never be reached unless there are bugs in Player */
-#define MAXIMUM_AUDIO_READAHEAD (48000*60)
+#define MAXIMUM_AUDIO_READAHEAD (48000 * MAXIMUM_VIDEO_READAHEAD / 24)
 
 #define LOG_WARNING(...) _log->log (String::compose(__VA_ARGS__), LogEntry::TYPE_WARNING);
 
@@ -60,6 +62,9 @@ Butler::Butler (shared_ptr<Player> player, shared_ptr<Log> log, AudioMapping aud
        _player_video_connection = _player->Video.connect (bind (&Butler::video, this, _1, _2));
        _player_audio_connection = _player->Audio.connect (bind (&Butler::audio, this, _1));
        _thread = new boost::thread (bind (&Butler::thread, this));
+#ifdef DCPOMATIC_LINUX
+       pthread_setname_np (_thread->native_handle(), "butler");
+#endif
 
        /* Create some threads to do work on the PlayerVideos we are creating; at present this is used to
           multi-thread JPEG2000 decoding.
@@ -93,20 +98,38 @@ Butler::~Butler ()
 bool
 Butler::should_run () const
 {
-       if (_video.size() >= MAXIMUM_VIDEO_READAHEAD) {
-               LOG_WARNING ("Butler video buffers reached %1 frames", _video.size());
+       if (_video.size() >= MAXIMUM_VIDEO_READAHEAD * 10) {
+               /* This is way too big */
+               throw ProgrammingError
+                       (__FILE__, __LINE__, String::compose ("Butler video buffers reached %1 frames (audio is %2)", _video.size(), _audio.size()));
        }
 
-       if (_audio.size() >= MAXIMUM_AUDIO_READAHEAD) {
-               LOG_WARNING ("Butler audio buffers reached %1 frames", _audio.size());
+       if (_audio.size() >= MAXIMUM_AUDIO_READAHEAD * 10) {
+               /* This is way too big */
+               throw ProgrammingError
+                       (__FILE__, __LINE__, String::compose ("Butler audio buffers reached %1 frames (video is %2)", _audio.size(), _video.size()));
        }
 
-       return (_video.size() < MINIMUM_VIDEO_READAHEAD || (!_disable_audio && _audio.size() < MINIMUM_AUDIO_READAHEAD))
-               && (_video.size() < MAXIMUM_VIDEO_READAHEAD)
-               && (_audio.size() < MAXIMUM_AUDIO_READAHEAD)
-               && !_stop_thread
-               && !_finished
-               && !_died;
+       if (_video.size() >= MAXIMUM_VIDEO_READAHEAD * 2) {
+               LOG_WARNING ("Butler video buffers reached %1 frames (audio is %2)", _video.size(), _audio.size());
+       }
+
+       if (_audio.size() >= MAXIMUM_AUDIO_READAHEAD * 2) {
+               LOG_WARNING ("Butler audio buffers reached %1 frames (video is %2)", _audio.size(), _video.size());
+       }
+
+       if (_stop_thread || _finished || _died) {
+               /* Definitely do not run */
+               return false;
+       }
+
+       if (_video.size() < MINIMUM_VIDEO_READAHEAD || (!_disable_audio && _audio.size() < MINIMUM_AUDIO_READAHEAD)) {
+               /* Definitely do run: we need data */
+               return true;
+       }
+
+       /* Run if we aren't full of video or audio */
+       return (_video.size() < MAXIMUM_VIDEO_READAHEAD) && (_audio.size() < MAXIMUM_AUDIO_READAHEAD);
 }
 
 void
@@ -204,12 +227,10 @@ Butler::prepare (weak_ptr<PlayerVideo> weak_video) const
 void
 Butler::video (shared_ptr<PlayerVideo> video, DCPTime time)
 {
-       {
-               boost::mutex::scoped_lock lm (_mutex);
-               if (_pending_seek_position) {
-                       /* Don't store any video while a seek is pending */
-                       return;
-               }
+       boost::mutex::scoped_lock lm (_mutex);
+       if (_pending_seek_position) {
+               /* Don't store any video while a seek is pending */
+               return;
        }
 
        _prepare_service.post (bind (&Butler::prepare, this, weak_ptr<PlayerVideo>(video)));
@@ -248,3 +269,10 @@ Butler::disable_audio ()
        boost::mutex::scoped_lock lm (_mutex);
        _disable_audio = true;
 }
+
+pair<size_t, string>
+Butler::memory_used () const
+{
+       /* XXX: should also look at _audio.memory_used() */
+       return _video.memory_used();
+}