Add Mohawk engine code. Part 1/3: main code.

svn-id: r46727

1 files changed, 157 insertions, 0 deletions

diff --git a/engines/mohawk/sound.h b/engines/mohawk/sound.h
new file mode 100644
index 0000000000..44c4409b0c
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+++ b/engines/mohawk/sound.h
@@ -0,0 +1,157 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef MOHAWK_SOUND_H
+#define MOHAWK_SOUND_H
+
+#include "common/scummsys.h"
+#include "common/str.h"
+
+#include "sound/audiostream.h"
+#include "sound/adpcm.h"
+#include "sound/mididrv.h"
+#include "sound/midiparser.h"
+#include "sound/mixer.h"
+
+#include "mohawk/mohawk.h"
+#include "mohawk/file.h"
+
+namespace Mohawk {
+
+#define MAX_CHANNELS 2         // Can there be more than 2?
+#define CUE_MAX 256
+
+struct SLSTRecord {
+	uint16 index;
+	uint16 sound_count;
+	uint16* sound_ids;
+	uint16 fade_flags;
+	uint16 loop;
+	uint16 global_volume;
+	uint16 u0;
+	uint16 u1;
+	uint16* volumes;
+	int16* balances;
+	uint16* u2;
+};
+
+enum SndHandleType {
+	kFreeHandle,
+	kUsedHandle
+};
+
+struct SndHandle {
+	Audio::SoundHandle handle;
+	SndHandleType type;
+};
+
+struct SLSTSndHandle {
+	Audio::SoundHandle *handle;
+	uint16 id;
+};
+
+struct ADPC_Chunk {            // Appears to only exist if there isn't MPEG-2 Audio
+	uint32 size;
+	uint16 u0;                 // Unknown (2 when there's a Cue# Chunk, 1 when there's not)
+	uint16 channels;
+	uint32 u1;                 // Unknown (always 0)
+	uint32 u2[MAX_CHANNELS];   // Unknown (0x00400000 for both channels)
+
+	// If there is a Cue# chunk, there can be two more variables:
+	uint32 u3;
+	uint32 u4[MAX_CHANNELS];
+};
+
+struct Cue_Chunk {
+	uint32 size;
+	uint16 point_count;
+	struct {
+		uint32 position;
+		byte length;
+		Common::String name;
+	} cueList[CUE_MAX];
+};
+
+enum {
+	kCodecRaw = 0,
+	kCodecADPCM = 1,
+	kCodecMPEG2 = 2
+};
+
+struct Data_Chunk {
+	uint32 size;
+	uint16 sample_rate;
+	uint32 sample_count;
+	byte bitsPerSample;
+	byte channels;
+	uint16 encoding;
+	uint16 loop;
+	uint32 loopStart;
+	uint32 loopEnd;
+	byte* audio_data;
+};
+
+class MohawkEngine;
+
+class Sound {
+public:
+	Sound(MohawkEngine*);
+	~Sound();
+	
+	void loadRivenSounds(uint16 stack);
+	Audio::SoundHandle *playSound(uint16 id, bool mainSoundFile = true, byte volume = Audio::Mixer::kMaxChannelVolume);
+	void playMidi(uint16 id);
+	void stopSound();
+	void pauseSound();
+	void resumeSound();
+	void playSLST(uint16 index, uint16 card);
+	void playSLST(SLSTRecord slstRecord);
+	void pauseSLST();
+	void resumeSLST();
+	void stopAllSLST();
+                
+private:
+	MohawkEngine *_vm;
+	MohawkFile *_rivenSoundFile;
+	MidiDriver *_midiDriver;
+	MidiParser *_midiParser;
+
+	static Audio::AudioStream *getCSAmtrakMusic(uint16 id);
+	static Audio::AudioStream *makeMohawkWaveStream(Common::SeekableReadStream *stream, bool loop = false);
+	static Audio::AudioStream *makeOldMohawkWaveStream(Common::SeekableReadStream *stream, bool loop = false);
+	void initMidi();
+
+	Common::Array<SndHandle> _handles;
+	SndHandle *getHandle();
+	
+	// Riven specific
+	void playSLSTSound(uint16 index, bool fade, bool loop, uint16 volume, int16 balance);
+	void stopSLSTSound(uint16 id, bool fade);
+	Common::Array<SLSTSndHandle> _currentSLSTSounds;
+};
+
+} // End of namespace Mohawk
+
+#endif