moved Audio CD (emulation) code from scumm/sound.cpp to sound/, so that it may be reused by other engines in the future

svn-id: r11421

1 files changed, 74 insertions, 0 deletions

diff --git a/sound/audiocd.h b/sound/audiocd.h
new file mode 100644
index 0000000000..c02e50f4f6
--- /dev/null
+++ b/sound/audiocd.h
@@ -0,0 +1,74 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2003 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 SOUND_AUDIOCD_H
+#define SOUND_AUDIOCD_H
+
+#include "stdafx.h"
+#include "common/scummsys.h"
+#include "common/singleton.h"
+#include "sound/mixer.h"
+
+class DigitalTrackInfo {
+public:
+	virtual bool error() = 0;
+	virtual int play(SoundMixer *mixer, PlayingSoundHandle *handle, int startFrame, int duration) = 0;
+	virtual ~DigitalTrackInfo() { }
+};
+
+
+class AudioCDManager : public Common::Singleton<AudioCDManager> {
+public:
+	void playCDTrack(int track, int numLoops, int startFrame, int duration);
+	void stopCD();
+	int pollCD() const;
+	void updateCD();
+
+private:
+	friend class Common::Singleton<AudioCDManager>;
+	AudioCDManager();
+
+	int getCachedTrack(int track);
+
+private:
+	/* used for emulated CD music */
+	enum {
+		CACHE_TRACKS = 10
+	};
+	int _cached_tracks[CACHE_TRACKS];
+	DigitalTrackInfo *_track_info[CACHE_TRACKS];
+	int _current_cache;
+
+	struct {
+		PlayingSoundHandle handle;
+		int track;
+		int start;
+		int duration;
+		int numLoops;
+		bool playing;
+	} _cd;
+
+};
+
+/** Shortcut for accessing the audio CD manager. */
+#define AudioCD		AudioCDManager::instance()
+
+#endif