From 107073537e4ad24e294e28a2a62f8d3ad33008ff Mon Sep 17 00:00:00 2001
From: Paweł Kołodziejski
Date: Tue, 23 May 2006 23:43:52 +0000
Subject: imported AGI engine

svn-id: r22588
---
 engines/agi/sound.h | 167 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 167 insertions(+)
 create mode 100644 engines/agi/sound.h

(limited to 'engines/agi/sound.h')

diff --git a/engines/agi/sound.h b/engines/agi/sound.h
new file mode 100644
index 0000000000..5af9fe1a5f
--- /dev/null
+++ b/engines/agi/sound.h
@@ -0,0 +1,167 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2006 The ScummVM project
+ *
+ * Copyright (C) 1999-2001 Sarien Team
+ *
+ * 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef __AGI_SOUND_H
+#define __AGI_SOUND_H
+
+#include "agi/agi.h"
+
+namespace Agi {
+
+#define BUFFER_SIZE	410
+
+#define SOUND_EMU_NONE	0
+#define SOUND_EMU_PC	1
+#define SOUND_EMU_TANDY	2
+#define SOUND_EMU_MAC	3
+#define SOUND_EMU_AMIGA	4
+
+#define SOUND_PLAYING   0x01
+#define WAVEFORM_SIZE   64
+#define ENV_ATTACK	10000		/**< envelope attack rate */
+#define ENV_DECAY       1000		/**< envelope decay rate */
+#define ENV_SUSTAIN     100		/**< envelope sustain level */
+#define ENV_RELEASE	7500		/**< envelope release rate */
+#define NUM_CHANNELS    7		/**< number of sound channels */
+
+/**
+ * AGI engine sound driver structure.
+ */
+struct sound_driver {
+	char *description;
+	int (*init) (int16 * buffer);
+	void (*deinit) (void);
+};
+
+/**
+ * AGI sound resource structure.
+ */
+struct agi_sound {
+	uint32 flen;		/**< size of raw data */
+	uint8 *rdata;		/**< raw sound data */
+	uint8 flags;		/**< sound flags */
+	uint16 type;		/**< sound resource type */
+};
+
+/**
+ * AGI sound note structure.
+ */
+struct agi_note {
+	uint8 dur_lo;		/**< LSB of note duration */
+	uint8 dur_hi;			/**< MSB of note duration */
+	uint8 frq_0;			/**< LSB of note frequency */
+	uint8 frq_1;			/**< MSB of note frequency */
+	uint8 vol;			/**< note volume */
+};
+
+/**
+ * AGI engine sound channel structure.
+ */
+struct channel_info {
+#define AGI_SOUND_SAMPLE	0x0001
+#define AGI_SOUND_MIDI		0x0002
+#define AGI_SOUND_4CHN		0x0008
+	uint32 type;
+	struct agi_note *ptr;
+#ifdef USE_PCM_SOUND
+	int16 *ins;
+	int32 size;
+	uint32 phase;
+#endif
+#define AGI_SOUND_LOOP		0x0001
+#define AGI_SOUND_ENVELOPE	0x0002
+	uint32 flags;
+#define AGI_SOUND_ENV_ATTACK	3
+#define AGI_SOUND_ENV_DECAY	2
+#define AGI_SOUND_ENV_SUSTAIN	1
+#define AGI_SOUND_ENV_RELEASE	0
+	uint32 adsr;
+	int32 timer;
+	uint32 end;
+	uint32 freq;
+	uint32 vol;
+	uint32 env;
+};
+
+void decode_sound(int);
+void unload_sound(int);
+void play_sound(void);
+int init_sound(void);
+void deinit_sound(void);
+void start_sound(int, int);
+void stop_sound(void);
+uint32 mix_sound(void);
+void __init_sound(void);
+int load_instruments(char *fname);
+
+extern struct sound_driver *snd;
+
+#endif				/* __AGI_SOUND_H */
+
+#ifdef USE_PCM_SOUND
+
+}                             // End of namespace Agi
+
+#include "sound/audiostream.h"
+
+namespace Audio {
+class Mixer;
+} // End of namespace Audio
+
+namespace Agi {
+
+class AGIMusic : public Audio::AudioStream {
+public:
+	AGIMusic(Audio::Mixer * pMixer);
+	~AGIMusic(void);
+	virtual void setVolume(uint8 volume);
+
+	// AudioStream API
+	int readBuffer(int16 * buffer, const int numSamples) {
+		premixerCall(buffer, numSamples / 2);
+		return numSamples;
+	}
+
+	bool isStereo() const {
+		return false;
+	}
+
+	bool endOfData() const {
+		return false;
+	}
+
+	int getRate() const {
+		return _sampleRate;
+	}
+
+private:
+	Audio::Mixer * _mixer;
+	uint32 _sampleRate;
+
+	void premixerCall(int16 * buf, uint len);
+};
+
+}                             // End of namespace Agi
+
+#endif
-- 
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