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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.
*
* $URL$
* $Id$
*
*/
/* Implementation of SCI instrument maps for GM and MT-32. */
#ifndef SCI_INSTRUMENT_MAP_
#define SCI_INSTRUMENT_MAP_
#include <stdlib.h>
#include "resource.h"
#include "../device.h"
#define SFX_INSTRUMENTS_NR 0x80
#define SFX_RHYTHM_NR 0x80
#define SFX_VELOCITIES_NR 0x80
#define SFX_NO_VELOCITY_MAP -1 /* use in velocity_map_index to indicate that no map should be used */
/* Instrument map types */
#define SFX_MAP_UNKNOWN 0
#define SFX_MAP_MT32 1 /* Original MT-32 map format */
#define SFX_MAP_MT32_GM 2 /* More recent map format used for both MT-32 and GM */
/* Patch not mapped */
#define SFX_UNMAPPED -1
/* Patch mapped to rhythm key */
#define SFX_MAPPED_TO_RHYTHM -2
/* Maximum velocity (used for scaling) */
#define SFX_MAX_VELOCITY 128
typedef struct {
int patch; /* Native instrument, SFX_UNMAPPED or SFX_MAPPED_TO_RHYTHM */
int rhythm; /* Rhythm key when patch == SFX_MAPPED_TO_RHYTHM */
} sfx_patch_map_t;
typedef struct {
sfx_patch_map_t patch_map[SFX_INSTRUMENTS_NR]; /* Map patch nr to which native instrument or rhythm key */
int patch_key_shift[SFX_INSTRUMENTS_NR]; /* Shift patch key by how much? */
int patch_volume_adjust[SFX_INSTRUMENTS_NR]; /* Adjust controller 7 by how much? */
int patch_bend_range[SFX_INSTRUMENTS_NR]; /* Bend range in semitones or SFX_UNMAPPED for default */
int percussion_map[SFX_RHYTHM_NR]; /* Map percussion instrument (RHYTH_CHANNEL) to what native 'key'? */
int percussion_volume_adjust; /* unused in SCI patches */
int velocity_map_index[SFX_INSTRUMENTS_NR]; /* Velocity translation map to use for that instrument */
int velocity_maps_nr; /* How many velocity translation maps do we have? */
byte **velocity_map; /* velocity_maps_nr entries, each of size SFX_VELOCITIES_NR */
int percussion_velocity_map_index; /* Special index for the percussion map */
int percussion_velocity_scale[SFX_INSTRUMENTS_NR]; /* Velocity scale (0 - SFX_PERC_MAX_VOL) */
size_t initialisation_block_size;
byte *initialisation_block; /* Initial MIDI commands to set up the device */
} sfx_instrument_map_t;
sfx_instrument_map_t *
sfx_instrument_map_new(int velocity_maps_nr);
/* Constructs a new default-initialised velocity map
** Parameters: (int) velocity_maps_nr: Number of velocity maps to allocate
** Returns : (sfx_instrument_map *) an initialised instrument map
*/
void
sfx_instrument_map_free(sfx_instrument_map_t *map);
/* Deallocates an instrument map
** Parameters: (sfx_instrument_map *) map: The map to deallocate, or NULL for a no-op
*/
sfx_instrument_map_t *
sfx_instrument_map_load_sci(byte *data, size_t length);
/* Allocate and initialise an instrument map from SCI data
** Parameters: (byte *) Pointer to the data to initialise from
** (size_t) Number of bytes to expect within
** Returns : (sfx_instrument_map_t *) An initialised instrument map for these settings, or NULL
** if `data' is NULL or `data' and `length' do not permit a valid instrument map
** If `data' is null, the function will return NULL quietly.
*/
sfx_instrument_map_t *
sfx_instrument_map_mt32_to_gm(byte *data, size_t size);
/* Allocate and initialise an instrument map from MT-32 patch data
** Parameters: (byte *) Pointer to the MT-32 patch data to initialise from
** (size_t) Number of bytes to expect within
** Returns : (sfx_instrument_map_t *) An initialised instrument map for these settings
** If `data' is null or invalid, the function will return a default MT-32 to GM map.
*/
int
sfx_instrument_map_detect(byte *data, size_t size);
/* Detects the type of patch data
** Parameters: (byte *) Pointer to the patch data
** (size_t) Number of bytes to expect within
** Returns : (int) SFX_MAP_SCI1 for an SCI1 instrument map, SFX_MAP_SCI0_MT32 for SCI0 MT-32 patch data,
** or SFX_MAP_UNKNOWN for unknown.
*/
midi_writer_t *
sfx_mapped_writer(midi_writer_t *writer, sfx_instrument_map_t *map);
/* Wrap a midi_writer_t into an instrument map
** Parameters: (midi_writer_t *) writer: The writer to wrap
** (sfx_instrument_map_t *) map: The map to apply to all commands going into the writer, or NULL
** Returns : (midi_writer_t *) A MIDI writer that preprocesses all data by `map' and otherwise relies on `writer'
** Effects : If successful and neccessary, this operation will send initialisation messages to the writer, as needed.
** If `map' is NULL, this returns `writer'. Otherwise it sets up a Decorator that handles translation and automatically
** deallocates the instrument map when the writer is closed.
*/
#endif /* !defined(SCI_INSTRUMENT_MAP_) */
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