Initial commit

engines/ultima/nuvie/sound/decoder/adlib_sfx_stream.h

@@ -0,0 +1,94 @@
+/* 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 NUVIE_SOUND_MIXER_DECODER_ADLIB_SFX_STREAM_H
+#define NUVIE_SOUND_MIXER_DECODER_ADLIB_SFX_STREAM_H
+
+#include "ultima/shared/std/string.h"
+#include "ultima/nuvie/sound/adplug/opl_class.h"
+#include "audio/audiostream.h"
+
+namespace Ultima {
+namespace Nuvie {
+
+class OriginFXAdLibDriver;
+class Configuration;
+
+
+using Std::string;
+
+class AdLibSfxStream : public Audio::RewindableAudioStream {
+public:
+	AdLibSfxStream() {
+		opl = nullptr;
+		duration = 0;
+	}
+
+	AdLibSfxStream(const Configuration *cfg, int rate, uint8 channel, sint8 note, uint8 velocity, uint8 program_number, uint32 d);
+	~AdLibSfxStream() override;
+
+	int readBuffer(sint16 *buffer, const int numSamples) override;
+
+	/** Is this a stereo stream? */
+	bool isStereo() const override {
+		return true;
+	}
+
+	/** Sample rate of the stream. */
+	int getRate() const override {
+		return opl->getRate();
+	}
+
+	bool rewind() override {
+		return false;
+	}
+
+	/**
+	 * End of data reached? If this returns true, it means that at this
+	 * time there is no data available in the stream. However there may be
+	 * more data in the future.
+	 * This is used by e.g. a rate converter to decide whether to keep on
+	 * converting data or stop.
+	 */
+	bool endOfData() const override {
+		if (total_samples_played >= duration) {
+			return true;
+		}
+		return false;
+	}
+
+	uint32 getLengthInMsec() {
+		return (uint32)(duration / (getRate() / 1000.0f));
+	}
+protected:
+
+	OplClass *opl;
+	OriginFXAdLibDriver *driver;
+	uint32 duration;
+	int interrupt_samples_left;
+	int interrupt_rate;
+	uint32 total_samples_played;
+};
+
+} // End of namespace Nuvie
+} // End of namespace Ultima
+
+#endif