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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 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.
*
* $URL$
* $Id$
*
*/
/* song player structure */
#ifndef _SFX_DEVICE_H
#define _SFX_DEVICE_H
/* Various types of resources */
#define SFX_DEVICE_NONE 0
#define SFX_DEVICE_MIDI 1 /* midi writer */
#define SFX_DEVICE_OPL2 2 /* OPL/2 sequencer */
struct _midi_device {
const char *name;
int (*init)(struct _midi_device *self);
/* Initializes the device
** Parameters: (midi_device_t *) self: Self reference
** Returns : (int) SFX_OK on success, SFX_ERROR if the device could not be
** opened
*/
int (*set_option)(struct _midi_device *self, char *name, char *value);
/* Sets an option for the device
** Parameters: (char *) name: Name of the option to set
** (char *) value: Value of the option to set
** Returns : (int) SFX_OK on success, SFX_ERROR otherwise (unsupported option)
*/
};
// FIXME: This evil hack below is needed to create the
// decorated_midi_writer struct in instrumen-map.c -- in C++, this can
// be replaced by simple subclassing.
#define MIDI_WRITER_BODY \
char *name; /* Name description of the device */ \
\
int (*init)(struct _midi_writer *self); \
/* Initializes the writer \
** Parameters: (midi_writer_t *) self: Self reference \
** Returns : (int) SFX_OK on success, SFX_ERROR if the device could not be \
** opened \
*/ \
\
int (*set_option)(struct _midi_writer *self, char *name, char *value); \
/* Sets an option for the writer \
** Parameters: (char *) name: Name of the option to set \
** (char *) value: Value of the option to set \
** Returns : (int) SFX_OK on success, SFX_ERROR otherwise (unsupported option) \
*/ \
\
int (*write)(struct _midi_writer *self, unsigned char *buf, int len); \
/* Writes some bytes to the MIDI stream \
** Parameters: (char *) buf: The buffer to write \
** (int) len: Number of bytes to write \
** Returns : (int) SFX_OK on success, SFX_ERROR on failure \
** No delta time is expected here. \
*/ \
\
void (*delay)(struct _midi_writer *self, int ticks); \
/* Introduces an explicit delay \
** Parameters: (int) ticks: Number of 60 Hz ticks to sleep \
*/ \
\
void (*flush)(struct _midi_writer *self); /* May be NULL */ \
/* Flushes the MIDI file descriptor \
** Parameters: (midi_writer_t *) self: Self reference \
*/ \
\
void (*reset_timer)(struct _midi_writer *self); \
/* Resets the timer associated with this device \
** Parameters: (midi_writer_t *) self: Self reference \
** This function makes sure that a subsequent write would have effect \
** immediately, and any delay() would be relative to the point in time \
** this function was invoked at. \
*/ \
\
void (*close)(struct _midi_writer *self); \
/* Closes the associated MIDI device \
** Parameters: (midi_writer_t *) self: Self reference \
*/
typedef struct _midi_writer {
MIDI_WRITER_BODY
} midi_writer_t;
void *
sfx_find_device(int type, char *name);
/* Looks up a device by name
** Parameters: (int) type: Device type to look up
** (char *) name: Comma-separated list of devices to choose from
** (in the order specified), or NULL for default
** Returns : (void *) The device requested, or NULL if no match was found
*/
#endif /* !_SFX_PLAYER_H */
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