3 files changed, 63 insertions, 0 deletions
diff --git a/engines/sci/sfx/iterator.cpp b/engines/sci/sfx/iterator.cpp
index ebba4bceac..6c5706a8c1 100644
--- a/engines/sci/sfx/iterator.cpp
+++ b/engines/sci/sfx/iterator.cpp
@@ -1164,6 +1164,41 @@ int CleanupSongIterator::nextCommand(byte *buf, int *result) {
 		return SI_FINISHED;
 }
 
+/**********************/
+/*-- Timer iterator --*/
+/**********************/
+TimerSongIterator::TimerSongIterator(int delta)
+	: _delta(delta) {
+}
+
+int TimerSongIterator::nextCommand(byte *buf, int *result) {
+	if (_delta) {
+	   return _delta;
+	}
+	return SI_FINISHED;
+}
+
+SongIterator *TimerSongIterator::handleMessage(Message msg) {
+	return NULL;
+}
+
+int TimerSongIterator::getTimepos() {
+	return 0;
+}
+
+Audio::AudioStream *TimerSongIterator::getAudioStream() {
+	return NULL;
+}
+
+SongIterator *TimerSongIterator::clone(int delta) {
+	TimerSongIterator *newit = new TimerSongIterator(*this);
+	return newit;
+}
+
+SongIterator *new_timer_iterator(int delta) {
+	return new TimerSongIterator(delta);
+}
+
 /**********************************/
 /*-- Fast-forward song iterator --*/
 /**********************************/
diff --git a/engines/sci/sfx/iterator.h b/engines/sci/sfx/iterator.h
index 547c479bbf..4e6df367c9 100644
--- a/engines/sci/sfx/iterator.h
+++ b/engines/sci/sfx/iterator.h
@@ -281,6 +281,12 @@ int songit_next(SongIterator **it, byte *buf, int *result, int mask);
 */
 SongIterator *songit_new(byte *data, uint size, SongIteratorType type, songit_id_t id);
 
+/* Constructs a new song timer iterator object
+** Parameters: (int) delta: The delta after which to fire SI_FINISHED
+** Returns   : (SongIterator *) A newly allocated but uninitialized song
+**             iterator
+*/
+SongIterator *new_timer_iterator(int delta);
 
 /* Handles a message to the song iterator
 ** Parameters: (SongIterator **): A reference to the variable storing the song iterator
diff --git a/engines/sci/sfx/iterator_internal.h b/engines/sci/sfx/iterator_internal.h
index 7d5a17fd25..00044b8ab7 100644
--- a/engines/sci/sfx/iterator_internal.h
+++ b/engines/sci/sfx/iterator_internal.h
@@ -181,6 +181,28 @@ private:
 
 #define PLAYMASK_NONE 0x0
 
+/***************************/
+/*--------- Timer ---------*/
+/***************************/
+
+/**
+ * A song iterator which waits a specified time and then fires
+ * SI_FINISHED. Used by DoSound, where audio resources are played (SCI1)
+ */
+class TimerSongIterator : public SongIterator {
+protected:
+	int _delta; /**!< Remaining time */
+
+public:
+	TimerSongIterator(int delta);
+
+	int nextCommand(byte *buf, int *result);
+	Audio::AudioStream *getAudioStream();
+	SongIterator *handleMessage(Message msg);
+	int getTimepos();
+	SongIterator *clone(int delta);
+};
+
 /**********************************/
 /*--------- Fast Forward ---------*/
 /**********************************/