Patch from Quietust

o Remove unused _system variables in player_v2a and player_v3a
o Sound player for MM NES :) Now we're playing chiptunes.

svn-id: r17425

1 files changed, 111 insertions, 0 deletions

diff --git a/scumm/player_nes.h b/scumm/player_nes.h
new file mode 100644
index 0000000000..c3132b6fdc
--- /dev/null
+++ b/scumm/player_nes.h
@@ -0,0 +1,111 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2001  Ludvig Strigeus
+ * Copyright (C) 2001-2005 The ScummVM project
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * $Header$
+ *
+ */
+
+#ifndef PLAYER_NES_H
+#define PLAYER_NES_H
+
+#include "common/scummsys.h"
+#include "scumm/music.h"
+#include "sound/audiostream.h"
+
+class SoundMixer;
+
+namespace Scumm {
+
+class ScummEngine;
+
+/**
+ * Scumm NES sound/music driver.
+ */
+class Player_NES : public AudioStream, public MusicEngine {
+public:
+	Player_NES(ScummEngine *scumm);
+	virtual ~Player_NES();
+
+	virtual void setMusicVolume(int vol);
+	virtual void startSound(int sound);
+	virtual void stopSound(int sound);
+	virtual void stopAllSounds();
+	virtual int  getSoundStatus(int sound) const;
+
+	// AudioStream API
+	int readBuffer(int16 *buffer, const int numSamples);
+	bool isStereo() const { return false; }
+	bool endOfData() const { return false; }
+	int getRate() const { return _sample_rate; }
+
+private:
+
+	void sound_play();
+	void playSFX(int nr);
+	void playMusic();
+	byte fetchSoundByte(int nr);
+	void chainCommand(int chan);
+	void checkSilenceChannels(int chan);
+
+	void APU_writeChannel(int chan, int offset, byte value);
+	void APU_writeControl(byte value);
+	byte APU_readStatus();
+
+	void do_mix(int16 *buf, uint len);
+
+	ScummEngine *_vm;
+	SoundMixer *_mixer;
+	int _sample_rate;
+	int _samples_per_frame;
+	int _current_sample;
+
+	static const int MAXVOLUME = 0x7F;
+	static const int NUMSLOTS = 3;
+	static const int NUMCHANS = 4;
+
+	struct slot {
+		int framesleft;
+		int id;
+		int type;
+		byte *data;
+		int offset;
+	} _slot[NUMSLOTS];
+
+	struct mchan {
+		int command;
+		int framedelay;
+		int pitch;
+		int volume;
+		int voldelta;
+		int envflags;
+		int cmdlock;
+	} _mchan[NUMCHANS];
+
+	bool isSFXplaying, wasSFXplaying;
+
+	byte *dataStart;
+	int numNotes;
+	byte *auxData1;
+	byte *auxData2;
+
+	byte *soundptr;
+};
+
+} // End of namespace Scumm
+
+#endif