+int const AudioContentProperty::AUDIO_GAIN = 203;
+int const AudioContentProperty::AUDIO_DELAY = 204;
+int const AudioContentProperty::AUDIO_MAPPING = 205;
+
+AudioContent::AudioContent (shared_ptr<const Film> f, DCPTime s)
+ : Content (f, s)
+ , _audio_gain (0)
+ , _audio_delay (Config::instance()->default_audio_delay ())
+{
+
+}
+
+AudioContent::AudioContent (shared_ptr<const Film> f, boost::filesystem::path p)
+ : Content (f, p)
+ , _audio_gain (0)
+ , _audio_delay (Config::instance()->default_audio_delay ())
+{
+
+}
+
+AudioContent::AudioContent (shared_ptr<const Film> f, cxml::ConstNodePtr node)
+ : Content (f, node)
+{
+ _audio_gain = node->number_child<float> ("AudioGain");
+ _audio_delay = node->number_child<int> ("AudioDelay");
+}
+
+AudioContent::AudioContent (shared_ptr<const Film> f, vector<shared_ptr<Content> > c)
+ : Content (f, c)
+{
+ shared_ptr<AudioContent> ref = dynamic_pointer_cast<AudioContent> (c[0]);
+ assert (ref);
+
+ for (size_t i = 0; i < c.size(); ++i) {
+ shared_ptr<AudioContent> ac = dynamic_pointer_cast<AudioContent> (c[i]);
+
+ if (ac->audio_gain() != ref->audio_gain()) {
+ throw JoinError (_("Content to be joined must have the same audio gain."));
+ }
+
+ if (ac->audio_delay() != ref->audio_delay()) {
+ throw JoinError (_("Content to be joined must have the same audio delay."));
+ }
+ }
+
+ _audio_gain = ref->audio_gain ();
+ _audio_delay = ref->audio_delay ();
+}