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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.
*
* $URL$
* $Id$
*
*/
#ifndef SCI_SFX_SEQUENCER_H
#define SCI_SFX_SEQUENCER_H
#include "common/scummsys.h"
#include "sci/sfx/sfx.h"
#include "sci/sfx/device.h"
namespace Sci {
#define SFX_SEQ_PATCHFILE_NONE -1
struct sfx_sequencer_t {
const char *name; /* Sequencer name */
const char *version; /* Sequencer version */
int device; /* Type of device the sequencer depends on, may be SFX_DEVICE_NONE. */
int (*set_option)(char *name, char *value);
/* Sets an option for the sequencing mechanism
** Parameters: (char *) name: The name describing what to set
** (char *) value: The value to set
** Returns : (int) SFX_OK, or SFX_ERROR if the name wasn't understood
*/
int (*open)(int patch_len, byte *patch, int patch2_len, byte *patch2, void *device);
/* Opens the sequencer for writing
** Parameters: (int) patch_len, patch2_len: Length of the patch data
** (byte *) patch, patch2: Bulk patch data
** (void *) device: A device matching the 'device' property, or NULL
** if the property is null.
** Returns : (int) SFX_OK on success, SFX_ERROR otherwise
** The device should be initialized to a tick frequency of 60 Hz.
** 'patch' and 'patch_len' refer to the patch resource passed to open,
** as specified by the 'patchfile' property. 'patch' may be NULL if the
** resource wasn't found.
** For more information regarding patch resources, please refer to the
** FreeSCI documentation, particularly the part regarding 'patch.*' resource
** data.
*/
int (*close)();
/* Closes the sequencer
** Returns : SFX_OK on success, SFX_ERROR otherwise
*/
int (*event)(byte command, int argc, byte *argv);
/* Plays a MIDI event
** Parameters: (byte) command: MIDI command to play
** (int) argc: Number of arguments to the command
** (byte *) argv: Pointer to additional arguments
** Returns : SFX_OK on success, SFX_ERROR otherwise
** argv is guaranteed to point to a sufficiently large number of
** arguments, as indicated by 'command' and the MIDI standard.
** No 'running status' will be passed, 'command' will always be
** explicit.
*/
int (*delay)(int ticks); /* OPTIONAL -- may be NULL, but highly recommended */
/* Inserts a delay (delta time) into the sequencer cue
** Parameters: (int) ticks: Number of 60 Hz ticks to delay
** Returns : SFX_OK on success, SFX_ERROR otherwise
*/
int (*reset_timer)(uint32 ts);
/* OPTIONAL -- may be NULL, but highly recommended in combination with delay() */
/* Resets the timer counter associated with the 'delay()' function
** Parameters: (uint32) ts: Timestamp of the base time
** Returns : SFX_OK on success, SFX_ERROR otherwise
*/
int (*allstop)(); /* OPTIONAL -- may be NULL */
/* Stops playing everything in the sequencer queue
** Returns : SFX_OK on success, SFX_ERROR otherwise
*/
int (*volume)(uint8 volume); /* OPTIONAL -- can be NULL */
/* Sets the sequencer volume
** Parameters; (byte) volume: The volume to set, with 0 being mute and 127 full volume
** Returns : SFX_OK on success, SFX_ERROR otherwise
*/
int (*reverb)(int param); /* OPTIONAL -- may be NULL */
/* Sets the device reverb
** Parameters; (int) param: The reverb to set
** Returns : SFX_OK on success, SFX_ERROR otherwise
*/
int patchfile, patchfile2; /* Patch resources to pass into the call to open(),
** if present, or SFX_SEQ_PATCHFILE_NONE */
uint8 playmask; /* SCI 'playflag' mask to determine which SCI song channels
** this sequencer should play */
/* 0x01 -- MT-32
** 0x02 -- Yamaha FB-01
** 0x04 -- CMS or Game Blaster
** 0x08 -- Casio MT540 or CT460
** 0x10 -- Tandy 3-voice
** 0x20 -- PC speaker
*/
uint8 play_rhythm; /* Plays the rhythm channel? */
int8 polyphony; /* Device polyphony (# of voices) */
int min_write_ahead_ms; /* Minimal write-ahead, in milliseconds */
/* Note that write-ahead is tuned automatically; this enforces a lower limit */
};
sfx_sequencer_t *sfx_find_sequencer(char *name);
/* Finds a sequencer by name
** Parameters: (char *) name: Name of the sequencer to look up, or NULL for default
** Returns : (sfx_sequencer_t *) The sequencer of matching name, or NULL
** if not found
*/
} // End of namespace Sci
#endif // SCI_SFX_SEQUENCER_H
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