Make terminate_threads() less likely to leave _threads containing invalid pointers.

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

diff --git a/src/lib/audio_merger.cc b/src/lib/audio_merger.cc
index ecfdfdc27ba54bc0b6cdd65f12a3f185c26297c1..a16c378c67309dac758c90abd27fc275ef7db769 100644 (file)
--- a/src/lib/audio_merger.cc
+++ b/src/lib/audio_merger.cc
@@ -56,11 +56,9 @@ AudioMerger::pull (DCPTime time)
 {
        list<pair<shared_ptr<AudioBuffers>, DCPTime> > out;
 
-       DCPTimePeriod period (_last_pull, time);
-       _buffers.sort (AudioMerger::BufferComparator());
-
        list<Buffer> new_buffers;
 
+       _buffers.sort (AudioMerger::BufferComparator());
        BOOST_FOREACH (Buffer i, _buffers) {
                if (i.period().to <= time) {
                        /* Completely within the pull period */
@@ -69,13 +67,15 @@ AudioMerger::pull (DCPTime time)
                } else if (i.time < time) {
                        /* Overlaps the end of the pull period */
                        shared_ptr<AudioBuffers> audio (new AudioBuffers (i.audio->channels(), frames(DCPTime(time - i.time))));
-                       audio->copy_from (i.audio.get(), audio->frames(), 0, 0);
-                       DCPOMATIC_ASSERT (audio->frames() > 0);
-                       out.push_back (make_pair (audio, i.time));
-                       i.audio->trim_start (audio->frames ());
-                       i.time += DCPTime::from_frames(audio->frames(), _frame_rate);
-                       DCPOMATIC_ASSERT (i.audio->frames() > 0);
-                       new_buffers.push_back (i);
+                       /* Though time > i.time, audio->frames() could be 0 if the difference in time is less than one frame */
+                       if (audio->frames() > 0) {
+                               audio->copy_from (i.audio.get(), audio->frames(), 0, 0);
+                               out.push_back (make_pair (audio, i.time));
+                               i.audio->trim_start (audio->frames ());
+                               i.time += DCPTime::from_frames(audio->frames(), _frame_rate);
+                               DCPOMATIC_ASSERT (i.audio->frames() > 0);
+                               new_buffers.push_back (i);
+                       }
                } else {
                        /* Not involved */
                        DCPOMATIC_ASSERT (i.audio->frames() > 0);
@@ -96,7 +96,6 @@ AudioMerger::pull (DCPTime time)
 void
 AudioMerger::push (boost::shared_ptr<const AudioBuffers> audio, DCPTime time)
 {
-       DCPOMATIC_ASSERT (time >= _last_pull);
        DCPOMATIC_ASSERT (audio->frames() > 0);
 
        DCPTimePeriod period (time, time + DCPTime::from_frames (audio->frames(), _frame_rate));
@@ -157,3 +156,9 @@ AudioMerger::push (boost::shared_ptr<const AudioBuffers> audio, DCPTime time)
                }
        }
 }
+
+void
+AudioMerger::clear ()
+{
+       _buffers.clear ();
+}