1 files changed, 41 insertions, 3 deletions
diff --git a/engines/sci/sound/music.h b/engines/sci/sound/music.h
index 40236c8445..23a072cb26 100644
--- a/engines/sci/sound/music.h
+++ b/engines/sci/sound/music.h
@@ -52,6 +52,17 @@ class SegManager;
 
 typedef Common::Array<uint16> SignalQueue;
 
+
+struct MusicEntryChannel {
+	// Channel info
+	int8 _prio; // 0 = essential; lower is higher priority
+	int8 _voices;
+	bool _dontRemap;
+	bool _dontMap;
+	bool _mute;
+};
+
+
 class MusicEntry : public Common::Serializable {
 public:
 	// Do not get these directly for the sound objects!
@@ -90,6 +101,8 @@ public:
 
 	Audio::Mixer::SoundType soundType;
 
+	int _usedChannels[16];
+	MusicEntryChannel _chan[16];
 	MidiParser_SCI *pMidiParser;
 
 	// this is used for storing signals, when the current signal is not yet
@@ -114,6 +127,27 @@ public:
 	virtual void saveLoadWithSerializer(Common::Serializer &ser);
 };
 
+struct DeviceChannelUsage {
+	MusicEntry *_song;
+	int _channel;
+	bool operator==(const DeviceChannelUsage& other) const { return _song == other._song && _channel == other._channel; }
+	bool operator!=(const DeviceChannelUsage& other) const { return !(*this == other); }
+};
+
+struct ChannelRemapping {
+	DeviceChannelUsage _map[16];
+	int _prio[16];
+	int _voices[16];
+	bool _dontRemap[16];
+	int _freeVoices;
+
+	void clear();
+	void swap(int i, int j);
+	void evict(int i);
+	ChannelRemapping& operator=(ChannelRemapping& other);
+	int lowestPrio() const;
+};
+
 typedef Common::Array<MusicEntry *> MusicList;
 typedef Common::Array<uint32> MidiCommandQueue;
 
@@ -198,9 +232,6 @@ public:
 	// where a deadlock can occur
 	Common::Mutex _mutex;
 
-	int16 tryToOwnChannel(MusicEntry *caller, int16 bestChannel);
-	void freeChannels(MusicEntry *caller);
-
 protected:
 	void sortPlayList();
 
@@ -213,6 +244,11 @@ protected:
 	// If true and a sound has a digital track, the sound from the AdLib track is played
 	bool _useDigitalSFX;
 
+	// remapping:
+	void remapChannels();
+	ChannelRemapping *determineChannelMap();
+	void resetDeviceChannel(int devChannel);
+
 private:
 	MusicList _playList;
 	bool _soundOn;
@@ -221,6 +257,8 @@ private:
 	int8 _channelRemap[16];
 	int8 _globalReverb;
 
+	DeviceChannelUsage _channelMap[16];
+
 	MidiCommandQueue _queuedCommands;
 	MusicType _musicType;