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engines/scumm/players/player_v1.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 SCUMM_PLAYERS_PLAYER_V1_H
+#define SCUMM_PLAYERS_PLAYER_V1_H
+
+#include "scumm/players/player_v2.h"
+
+namespace Scumm {
+
+/**
+ * Scumm V1 PC-Speaker player.
+ */
+class Player_V1 : public Player_V2 {
+public:
+	Player_V1(ScummEngine *scumm, Audio::Mixer *mixer, bool pcjr);
+	~Player_V1() override;
+
+	void startSound(int sound) override;
+	void stopSound(int sound) override;
+	void stopAllSounds() override;
+	int  getMusicTimer() override;
+
+protected:
+	void nextTick() override;
+	void clear_channel(int i) override;
+	void chainSound(int nr, byte *data) override;
+
+	void generateSpkSamples(int16 *data, uint len) override;
+	void generatePCjrSamples(int16 *data, uint len) override;
+
+	void set_mplex(uint mplex);
+	void parseSpeakerChunk();
+	void nextSpeakerCmd();
+	void parsePCjrChunk();
+	void nextPCjrCmd();
+
+private:
+	struct channel_data_v1 {
+		uint freq;
+		uint volume;
+		byte *cmd_ptr;
+		uint notelen;
+		uint hull_counter;
+		uint attack;
+		uint decay;
+		uint level;
+		uint sustain_1;
+		uint sustain_2;
+		int  sustctr;
+	};
+
+	channel_data_v1 _channels[4];
+
+	byte *_next_chunk;
+	byte *_repeat_chunk;
+	uint  _chunk_type;
+	uint  _mplex_step;
+	uint  _mplex;
+	uint  _repeat_ctr;
+	int   _forced_level;
+	uint16 _random_lsr;
+	uint  *_value_ptr;
+	uint  _time_left;
+	uint  _start;
+	uint  _end;
+	int   _delta;
+	uint  *_value_ptr_2;
+	uint  _time_left_2;
+	uint  _start_2;
+	int   _delta_2;
+};
+
+} // End of namespace Scumm
+
+#endif