Initial import

1 files changed, 197 insertions, 0 deletions

diff --git a/include/sound/seq_midi_emul.h b/include/sound/seq_midi_emul.h
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index 000000000..8139d8c19
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+++ b/include/sound/seq_midi_emul.h
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+#ifndef __SOUND_SEQ_MIDI_EMUL_H
+#define __SOUND_SEQ_MIDI_EMUL_H
+
+/*
+ *  Midi channel definition for optional channel management.
+ *
+ *  Copyright (C) 1999 Steve Ratcliffe
+ *
+ *   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */
+
+#include <sound/seq_kernel.h>
+
+/*
+ * This structure is used to keep track of the current state on each
+ * channel.  All drivers for hardware that does not understand midi
+ * directly will probably need to use this structure.
+ */
+struct snd_midi_channel {
+	void *private;		/* A back pointer to driver data */
+	int  number;		/* The channel number */
+	int  client;		/* The client associated with this channel */
+	int  port;		/* The port associated with this channel */
+
+	unsigned char midi_mode;	/* GM, GS, XG etc */
+	unsigned int 
+		drum_channel:1,		/* Drum channel */
+		param_type:1		/* RPN/NRPN */
+		;
+
+	unsigned char midi_aftertouch;	/* Aftertouch (key pressure) */
+	unsigned char midi_pressure;	/* Channel pressure */
+	unsigned char midi_program;	/* Instrument number */
+	short midi_pitchbend;		/* Pitch bend amount */
+
+	unsigned char control[128];	/* Current value of all controls */
+	unsigned char note[128];	/* Current status for all notes */
+
+	short gm_rpn_pitch_bend_range;	/* Pitch bend range */
+	short gm_rpn_fine_tuning; 	/* Master fine tuning */
+	short gm_rpn_coarse_tuning;	/* Master coarse tuning */
+
+};
+
+/*
+ * A structure that represets a set of channels bound to a port.  There
+ * would usually be 16 channels per port.  But fewer could be used for
+ * particular cases.
+ * The channel set consists of information describing the client and
+ * port for this midi synth and an array of snd_midi_channel structures.
+ * A driver that had no need for snd_midi_channel could still use the
+ * channel set type if it wished with the channel array null.
+ */
+struct snd_midi_channel_set {
+	void *private_data;		/* Driver data */
+	int  client;			/* Client for this port */
+	int  port;			/* The port number */
+
+	int  max_channels;		/* Size of the channels array */
+	struct snd_midi_channel *channels;
+
+	unsigned char midi_mode;	/* MIDI operating mode */
+	unsigned char gs_master_volume;	/* SYSEX master volume: 0-127 */
+	unsigned char gs_chorus_mode;
+	unsigned char gs_reverb_mode;
+
+};
+
+struct snd_midi_op {
+	void (*note_on)(void *private_data, int note, int vel, struct snd_midi_channel *chan);
+	void (*note_off)(void *private_data,int note, int vel, struct snd_midi_channel *chan); /* release note */
+	void (*key_press)(void *private_data, int note, int vel, struct snd_midi_channel *chan);
+	void (*note_terminate)(void *private_data, int note, struct snd_midi_channel *chan); /* terminate note immediately */
+	void (*control)(void *private_data, int type, struct snd_midi_channel *chan);
+	void (*nrpn)(void *private_data, struct snd_midi_channel *chan,
+		     struct snd_midi_channel_set *chset);
+	void (*sysex)(void *private_data, unsigned char *buf, int len, int parsed,
+		      struct snd_midi_channel_set *chset);
+};
+
+/*
+ * These defines are used so that pitchbend, aftertouch etc, can be
+ * distinguished from controller values.
+ */
+/* 0-127 controller values */
+#define MIDI_CTL_PITCHBEND	0x80
+#define MIDI_CTL_AFTERTOUCH	0x81
+#define MIDI_CTL_CHAN_PRESSURE	0x82
+
+/*
+ * These names exist to allow symbolic access to the controls array.
+ * The usage is eg: chan->gm_bank_select.  Another implementation would
+ * be really have these members in the struct, and not the array.
+ */
+#define gm_bank_select		control[0]
+#define gm_modulation		control[1]
+#define gm_breath		control[2]
+#define gm_foot_pedal		control[4]
+#define gm_portamento_time	control[5]
+#define gm_data_entry		control[6]
+#define gm_volume		control[7]
+#define gm_balance		control[8]
+#define gm_pan			control[10]
+#define gm_expression		control[11]
+#define gm_effect_control1	control[12]
+#define gm_effect_control2	control[13]
+#define gm_slider1		control[16]
+#define gm_slider2		control[17]
+#define gm_slider3		control[18]
+#define gm_slider4		control[19]
+
+#define gm_bank_select_lsb	control[32]
+#define gm_modulation_wheel_lsb	control[33]
+#define gm_breath_lsb		control[34]
+#define gm_foot_pedal_lsb	control[36]
+#define gm_portamento_time_lsb	control[37]
+#define gm_data_entry_lsb	control[38]
+#define gm_volume_lsb		control[39]
+#define gm_balance_lsb		control[40]
+#define gm_pan_lsb		control[42]
+#define gm_expression_lsb	control[43]
+#define gm_effect_control1_lsb	control[44]
+#define gm_effect_control2_lsb	control[45]
+
+#define gm_sustain	 	control[MIDI_CTL_SUSTAIN]
+#define gm_hold			gm_sustain
+#define gm_portamento		control[MIDI_CTL_PORTAMENTO]
+#define gm_sostenuto		control[MIDI_CTL_SOSTENUTO]
+
+/*
+ * These macros give the complete value of the controls that consist
+ * of coarse and fine pairs.  Of course the fine controls are seldom used
+ * but there is no harm in being complete.
+ */
+#define SNDRV_GM_BANK_SELECT(cp)		(((cp)->control[0]<<7)|((cp)->control[32]))
+#define SNDRV_GM_MODULATION_WHEEL(cp)	(((cp)->control[1]<<7)|((cp)->control[33]))
+#define SNDRV_GM_BREATH(cp)		(((cp)->control[2]<<7)|((cp)->control[34]))
+#define SNDRV_GM_FOOT_PEDAL(cp)		(((cp)->control[4]<<7)|((cp)->control[36]))
+#define SNDRV_GM_PORTAMENTO_TIME(cp)	(((cp)->control[5]<<7)|((cp)->control[37]))
+#define SNDRV_GM_DATA_ENTRY(cp)		(((cp)->control[6]<<7)|((cp)->control[38]))
+#define SNDRV_GM_VOLUME(cp)		(((cp)->control[7]<<7)|((cp)->control[39]))
+#define SNDRV_GM_BALANCE(cp)		(((cp)->control[8]<<7)|((cp)->control[40]))
+#define SNDRV_GM_PAN(cp)			(((cp)->control[10]<<7)|((cp)->control[42]))
+#define SNDRV_GM_EXPRESSION(cp)		(((cp)->control[11]<<7)|((cp)->control[43]))
+
+
+/* MIDI mode */
+#define SNDRV_MIDI_MODE_NONE	0	/* Generic midi */
+#define SNDRV_MIDI_MODE_GM	1
+#define SNDRV_MIDI_MODE_GS	2
+#define SNDRV_MIDI_MODE_XG	3
+#define SNDRV_MIDI_MODE_MT32	4
+
+/* MIDI note state */
+#define SNDRV_MIDI_NOTE_OFF		0x00
+#define SNDRV_MIDI_NOTE_ON		0x01
+#define SNDRV_MIDI_NOTE_RELEASED		0x02
+#define SNDRV_MIDI_NOTE_SOSTENUTO		0x04
+ 
+#define SNDRV_MIDI_PARAM_TYPE_REGISTERED		0
+#define SNDRV_MIDI_PARAM_TYPE_NONREGISTERED	1
+
+/* SYSEX parse flag */
+enum {
+	SNDRV_MIDI_SYSEX_NOT_PARSED = 0,
+	SNDRV_MIDI_SYSEX_GM_ON,	
+	SNDRV_MIDI_SYSEX_GS_ON,	
+	SNDRV_MIDI_SYSEX_GS_RESET,	
+	SNDRV_MIDI_SYSEX_GS_CHORUS_MODE,
+	SNDRV_MIDI_SYSEX_GS_REVERB_MODE,
+	SNDRV_MIDI_SYSEX_GS_MASTER_VOLUME,
+	SNDRV_MIDI_SYSEX_GS_PROGRAM,
+	SNDRV_MIDI_SYSEX_GS_DRUM_CHANNEL,
+	SNDRV_MIDI_SYSEX_XG_ON,	
+};
+
+/* Prototypes for midi_process.c */
+void snd_midi_process_event(struct snd_midi_op *ops, struct snd_seq_event *ev,
+			    struct snd_midi_channel_set *chanset);
+void snd_midi_channel_set_clear(struct snd_midi_channel_set *chset);
+struct snd_midi_channel_set *snd_midi_channel_alloc_set(int n);
+void snd_midi_channel_free_set(struct snd_midi_channel_set *chset);
+
+#endif /* __SOUND_SEQ_MIDI_EMUL_H */