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engines/mohawk/sound.h

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+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef MOHAWK_SOUND_H
+#define MOHAWK_SOUND_H
+
+#include "common/array.h"
+#include "common/scummsys.h"
+#include "common/str.h"
+#include "common/stream.h"
+
+#include "audio/mixer.h"
+
+class MidiDriver;
+class MidiParser;
+
+namespace Audio {
+class RewindableAudioStream;
+}
+
+namespace Mohawk {
+
+#define MAX_CHANNELS 2         // Can there be more than 2?
+
+enum SndHandleType {
+	kFreeHandle,
+	kUsedHandle
+};
+
+struct SndHandle {
+	Audio::SoundHandle handle;
+	SndHandleType type;
+	uint samplesPerSecond;
+	uint16 id;
+};
+
+struct ADPCMStatus { // Holds ADPCM status data, but is irrelevant for us.
+	uint32 size;
+	uint16 itemCount;
+	uint16 channels;
+
+	struct StatusItem {
+		uint32 sampleFrame;
+		struct {
+			int16 last;
+			uint16 stepIndex;
+		} channelStatus[MAX_CHANNELS];
+	} *statusItems;
+};
+
+struct CueListPoint {
+	uint32 sampleFrame;
+	Common::String name;
+};
+
+struct CueList {
+	uint32 size;
+	uint16 pointCount;
+	Common::Array<CueListPoint> points;
+};
+
+enum {
+	kCodecRaw = 0,
+	kCodecADPCM = 1,
+	kCodecMPEG2 = 2
+};
+
+struct DataChunk {
+	uint16 sampleRate;
+	uint32 sampleCount;
+	byte bitsPerSample;
+	byte channels;
+	uint16 encoding;
+	uint16 loopCount; // 0 == no looping, 0xFFFF == infinite loop
+	uint32 loopStart;
+	uint32 loopEnd;
+	Common::SeekableReadStream *audioData;
+};
+
+Audio::RewindableAudioStream *makeMohawkWaveStream(Common::SeekableReadStream *stream, CueList *cueList = nullptr);
+
+class MohawkEngine;
+
+class Sound {
+public:
+	explicit Sound(MohawkEngine *vm);
+	~Sound();
+
+	// Generic sound functions
+	Audio::SoundHandle *playSound(uint16 id, byte volume = Audio::Mixer::kMaxChannelVolume, bool loop = false, CueList *cueList = NULL);
+	void stopSound();
+	void stopSound(uint16 id);
+	bool isPlaying(uint16 id);
+	bool isPlaying();
+	uint getNumSamplesPlayed(uint16 id);
+
+private:
+	MohawkEngine *_vm;
+
+	static Audio::RewindableAudioStream *makeLivingBooksWaveStream_v1(Common::SeekableReadStream *stream);
+
+	Common::Array<SndHandle> _handles;
+	SndHandle *getHandle();
+	Audio::RewindableAudioStream *makeAudioStream(uint16 id, CueList *cueList = nullptr);
+};
+
+} // End of namespace Mohawk
+
+#endif