SCI: added currently commented-out pauseSound implementation for some sci0 games, allowing integer for that subfunction

svn-id: r50759

3 files changed, 41 insertions, 4 deletions

diff --git a/engines/sci/sound/music.cpp b/engines/sci/sound/music.cpp
index 874f0a381e..cf084f81eb 100644
--- a/engines/sci/sound/music.cpp
+++ b/engines/sci/sound/music.cpp
@@ -166,8 +166,6 @@ void SciMusic::pauseAll(bool pause) {
 }
 
 void SciMusic::stopAll() {
-	Common::StackLock lock(_mutex);
-
 	const MusicList::iterator end = _playList.end();
 	for (MusicList::iterator i = _playList.begin(); i != end; ++i) {
 		soundStop(*i);
@@ -199,6 +197,24 @@ MusicEntry *SciMusic::getSlot(reg_t obj) {
 	return NULL;
 }
 
+// We return the currently active music slot for SCI0
+MusicEntry *SciMusic::getActiveSci0MusicSlot() {
+	const MusicList::iterator end = _playList.end();
+	MusicEntry *highestPrioritySlot = NULL;
+	for (MusicList::iterator i = _playList.begin(); i != end; ++i) {
+		MusicEntry *playSlot = *i;
+		if (playSlot->pMidiParser) {
+			if (playSlot->status == kSoundPlaying)
+				return playSlot;
+			if (playSlot->status == kSoundPaused) {
+				if ((!highestPrioritySlot) || (highestPrioritySlot->priority < playSlot->priority))
+					highestPrioritySlot = playSlot;
+			}
+		}
+	}
+	return highestPrioritySlot;
+}
+
 void SciMusic::setReverb(byte reverb) {
 	Common::StackLock lock(_mutex);
 	_pMidiDrv->setReverb(reverb);
diff --git a/engines/sci/sound/music.h b/engines/sci/sound/music.h
index 486848b48f..943a5bd2a8 100644
--- a/engines/sci/sound/music.h
+++ b/engines/sci/sound/music.h
@@ -157,6 +157,7 @@ public:
 	}
 
 	MusicEntry *getSlot(reg_t obj);
+	MusicEntry *getActiveSci0MusicSlot();
 
 	void pushBackSlot(MusicEntry *slotEntry) {
 		Common::StackLock lock(_mutex);
diff --git a/engines/sci/sound/soundcmd.cpp b/engines/sci/sound/soundcmd.cpp
index b1ad11651f..b23aed4745 100644
--- a/engines/sci/sound/soundcmd.cpp
+++ b/engines/sci/sound/soundcmd.cpp
@@ -213,8 +213,28 @@ reg_t SoundCommandParser::kDoSoundPause(int argc, reg_t *argv, reg_t acc) {
 	uint16 value = argc > 1 ? argv[1].toUint16() : 0;
 
 	if (!obj.segment) {		// pause the whole playlist
-		// Pausing/Resuming the whole playlist was introduced in the SCI1 late
-		// sound scheme.
+		// SCI0 games (up to including qfg1) give us 0/1 for either resuming or pausing the current music
+		//  this one doesn't count, so pausing 2 times and resuming once means here that we are supposed to resume
+		if (_soundVersion <= SCI_VERSION_0_LATE) {
+			// TODO: this code doesn't work right currently
+			return make_reg(0, 0);
+			MusicEntry *musicSlot = _music->getActiveSci0MusicSlot();
+			switch (obj.offset) {
+			case 1:
+				if ((musicSlot) && (musicSlot->status == kSoundPlaying))
+					_music->soundPause(musicSlot);
+				return make_reg(0, 0);
+			case 0:
+				if ((musicSlot) && (musicSlot->status == kSoundPaused))
+					_music->soundResume(musicSlot);
+					return make_reg(0, 1);
+				return make_reg(0, 0);
+			default:
+				error("kDoSoundPause: parameter 0 is invalid for sound-sci0");
+			}
+		}
+
+		// Pausing/Resuming the whole playlist was introduced in the SCI1 late sound scheme.
 		if (_soundVersion <= SCI_VERSION_1_EARLY)
 			return acc;