AUDIO: Change several fake MidiDrivers to MidiDriver_BASE subclasses

Many engines follow the advice in audio/midiparser.h and create a
"pseudo-MidiDriver" subclass. But MidiParser really only needs a tiny
subset of the MidiDriver capabilities, namely those found in
MidiDriver_BASE. So we try to subclass from that whenever possible; this
allows us to remove many stub methods, and enables further future
simplifications.

1 files changed, 1 insertions, 9 deletions

diff --git a/engines/made/music.h b/engines/made/music.h
index 024588ea4d..6bd4da470e 100644
--- a/engines/made/music.h
+++ b/engines/made/music.h
@@ -41,7 +41,7 @@ enum MusicFlags {
 	MUSIC_LOOP = 1
 };
 
-class MusicPlayer : public MidiDriver {
+class MusicPlayer : public MidiDriver_BASE {
 public:
 	MusicPlayer(MidiDriver *driver);
 	~MusicPlayer();
@@ -66,19 +66,11 @@ public:
 
 	//MidiDriver interface implementation
 	int open();
-	bool isOpen() const;
 	void close();
 	void send(uint32 b);
 
 	void metaEvent(byte type, byte *data, uint16 length);
 
-	void setTimerCallback(void *timerParam, void (*timerProc)(void *)) { }
-	uint32 getBaseTempo()	{ return _driver ? _driver->getBaseTempo() : 0; }
-
-	//Channel allocation functions
-	MidiChannel *allocateChannel()		{ return 0; }
-	MidiChannel *getPercussionChannel()	{ return 0; }
-
 	MidiParser *_parser;
 	Common::Mutex _mutex;