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engines/adl/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 ADL_SOUND_H
+#define ADL_SOUND_H
+
+#include "audio/audiostream.h"
+
+#include "common/array.h"
+#include "common/frac.h"
+
+namespace Adl {
+
+class Speaker;
+
+struct Tone {
+	double freq; // Hz
+	double len; // ms
+
+	Tone(double frequency, double length) : freq(frequency), len(length) { }
+};
+
+typedef Common::Array<Tone> Tones;
+
+class Sound : public Audio::AudioStream {
+public:
+	Sound(const Tones &tones);
+	~Sound() override;
+
+	// AudioStream
+	int readBuffer(int16 *buffer, const int numSamples) override;
+	bool isStereo() const override { return false; }
+	bool endOfData() const override;
+	int getRate() const override	{ return _rate; }
+
+private:
+	const Tones &_tones;
+
+	Speaker *_speaker;
+	int _rate;
+	uint _toneIndex;
+	int _samplesRem;
+};
+
+} // End of namespace Adl
+
+#endif