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engines/ultima/nuvie/sound/decoder/pc_speaker_stream.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 NUVIE_SOUND_MIXER_DECODER_PC_SPEAKER_STREAM_H
+#define NUVIE_SOUND_MIXER_DECODER_PC_SPEAKER_STREAM_H
+
+#include "ultima/shared/std/string.h"
+#include "ultima/nuvie/sound/decoder/pc_speaker.h"
+#include "audio/audiostream.h"
+
+namespace Ultima {
+namespace Nuvie {
+
+class PCSpeakerStream : public Audio::RewindableAudioStream {
+public:
+	PCSpeakerStream() {
+		pcspkr = new PCSpeaker(SPKR_OUTPUT_RATE);
+		finished = false;
+	}
+
+	~PCSpeakerStream() override {
+		delete pcspkr;
+	}
+
+	/** Is this a stereo stream? */
+	bool isStereo() const override {
+		return false;
+	}
+
+	/** Sample rate of the stream. */
+	int getRate() const override {
+		return SPKR_OUTPUT_RATE;
+	}
+
+	/**
+	 * 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 {
+		return finished;
+	}
+
+	bool rewind() override {
+		return false;
+	}
+
+protected:
+	PCSpeaker *pcspkr;
+	bool finished;
+};
+
+
+class PCSpeakerFreqStream : public PCSpeakerStream {
+public:
+	PCSpeakerFreqStream() {
+
+	}
+
+	PCSpeakerFreqStream(uint start, uint16 d);
+	~PCSpeakerFreqStream() override;
+	uint32 getLengthInMsec();
+	int readBuffer(sint16 *buffer, const int numSamples) override;
+
+protected:
+
+	uint32 frequency;
+	uint32 duration;
+	uint32 total_samples_played;
+
+};
+
+class PCSpeakerSweepFreqStream : public PCSpeakerStream {
+public:
+	PCSpeakerSweepFreqStream() {
+
+	}
+
+	PCSpeakerSweepFreqStream(uint start, uint end, uint16 d, uint16 s);
+	~PCSpeakerSweepFreqStream() override;
+	uint32 getLengthInMsec();
+	int readBuffer(sint16 *buffer, const int numSamples) override;
+
+protected:
+
+	uint32 start_freq;
+	uint32 finish_freq;
+	uint32 cur_freq;
+	uint16 duration;
+	uint16 stepping;
+
+	uint32 freq_step;
+	float samples_per_step;
+	float sample_pos;
+	uint32 total_samples_played;
+	uint32 num_steps;
+	uint32 cur_step;
+
+};
+
+class PCSpeakerRandomStream : public PCSpeakerStream {
+public:
+	PCSpeakerRandomStream() {
+
+	}
+
+	PCSpeakerRandomStream(uint start, uint16 d, uint16 s);
+	~PCSpeakerRandomStream() override;
+	uint32 getLengthInMsec();
+	uint16 getNextFreqValue();
+	int readBuffer(sint16 *buffer, const int numSamples) override;
+
+protected:
+
+	uint16 base_val;
+	uint16 duration;
+	uint16 stepping;
+
+	uint32 rand_value;
+	uint32 sample_pos;
+	uint32 total_samples_played;
+	uint32 samples_per_step;
+	uint32 num_steps;
+	uint32 cur_step;
+
+};
+
+class PCSpeakerStutterStream : public PCSpeakerStream {
+public:
+	PCSpeakerStutterStream() {
+
+	}
+
+	PCSpeakerStutterStream(sint16 a0, uint16 a2, uint16 a4, uint16 a6, uint16 a8);
+	~PCSpeakerStutterStream() override;
+	uint32 getLengthInMsec();
+	int readBuffer(sint16 *buffer, const int numSamples) override;
+
+protected:
+
+	sint16 arg_0;
+	uint16 arg_2;
+	uint16 arg_4;
+	uint16 arg_6;
+	uint16 arg_8;
+
+	uint16 dx;
+	uint16 cx;
+	float delay;
+	float delay_remaining;
+
+};
+
+Audio::AudioStream *makePCSpeakerSlugDissolveSfxStream(uint rate);
+Audio::AudioStream *makePCSpeakerGlassSfxStream(uint rate);
+Audio::AudioStream *makePCSpeakerMagicCastingP1SfxStream(uint rate, uint8 magic_circle);
+Audio::AudioStream *makePCSpeakerMagicCastingP2SfxStream(uint rate, uint8 magic_circle);
+Audio::AudioStream *makePCSpeakerAvatarDeathSfxStream(uint rate);
+Audio::AudioStream *makePCSpeakerKalLorSfxStream(uint rate);
+Audio::AudioStream *makePCSpeakerHailStoneSfxStream(uint rate);
+Audio::AudioStream *makePCSpeakerEarthQuakeSfxStream(uint rate);
+
+} // End of namespace Nuvie
+} // End of namespace Ultima
+
+#endif