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131 lines
4.6 KiB
C
131 lines
4.6 KiB
C
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#ifndef SFX_SOFTSEQ_H_
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#define SFX_SOFTSEQ_H_
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#include "sci/include/sfx_core.h"
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#include "sci/include/sfx_pcm.h"
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#include "sci/sfx/sequencer.h"
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#include "sci/include/resource.h"
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/* Software sequencer */
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typedef struct sfx_softseq {
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const char *name;
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const char *version;
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int
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(*set_option)(struct sfx_softseq *self, const char *name, const char *value);
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/* Sets an option for the sequencer
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** Parameters: (sfx_softseq_t *) self: Self reference
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** (const char *) name: Name of the option to set
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** (const char *) value: Value to set the option to
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** Returns : (int) GFX_OK on success, or GFX_ERROR if not supported
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*/
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int
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(*init)(struct sfx_softseq *self, byte *res_data, int res_size,
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byte *res2_data, int res2_size);
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/* Initialises the sequencer
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** Parameters: (sfx_softseq_t *) self: Self reference
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** (byte *) res_data: Resource data for 'patch_nr' (see below)
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** (int) res_size: Number of bytes in 'res_data'
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** (byte *) res2_data: Resource data for 'patch2_nr' (see below)
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** (int) res2_size: Number of bytes in 'res2_data'
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** Returns : (int) SFX_OK on success, SFX_ERROR otherwise
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** Note that 'res_data' is only a valid pointer for this call. If the
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** data is needed later during execution, it should be backed up internally.
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** If the requested resource is not available, res_data will be NULL
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** /even if/ patch_nr is set.
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*/
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void
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(*exit)(struct sfx_softseq *self);
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/* Uninitialises the sequencer and frees all used resources
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** Parameters: (sfx_softseq_t *) self: Self reference
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*/
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void
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(*set_volume)(struct sfx_softseq *self, int new_volume);
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/* Sets the sequencer volume
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** Parameters: (sfx_softseq_t *) self: Self reference
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** (int) new_volume: A volume, between 0 (quiet) and 127 (max)
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*/
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void
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(*handle_command)(struct sfx_softseq *self, byte cmd, int argc, byte *argv);
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/* Handle a MIDI command
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** Parameters: (sfx_softseq_t *) self: Self reference
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** (byte) cmd: Basic MIDI command, always includes command and channel
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** (int) argc: Number of additional arguments to this command
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** (byte *) argv: Additional arguments to 'cmd'
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*/
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void
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(*poll)(struct sfx_softseq *self, byte *dest, int len);
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/* Asks the software sequencer to fill in parts of a buffer
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** Parameters: (sfx_softseq_t *) self: Self reference
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** (int) len: Number of _frames_ to write
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** Returns : (byte) *dest: 'len' frames must be written to this buffer
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*/
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void
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(*allstop)(struct sfx_softseq *self);
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/* Stops all sound generation
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** Parameters: (sfx_softseq_t *) self: Self reference
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*/
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void *internal; /* Internal data, may be used by sfx_softseq_t inmplementors */
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int patch_nr; /* Number of the first patch file associated with this sequencer,
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** or SFX_SEQ_PATCHFILE_NONE */
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int patch2_nr; /* Number of the second patch file associated with this sequencer,
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** or SFX_SEQ_PATCHFILE_NONE */
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int playmask; /* playflag identifying the device emulated */
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/* 0x01 -- MT-32
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** 0x02 -- Yamaha FB-01
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** 0x04 -- CMS or Game Blaster
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** 0x08 -- Casio MT540 or CT460
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** 0x10 -- Tandy 3-voice
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** 0x20 -- PC speaker
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*/
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int play_rhythm; /* Whether the rhythm channel (9) should be played */
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int polyphony; /* Number of voices played */
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sfx_pcm_config_t pcm_conf; /* Setup of the channel the sequencer writes to */
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} sfx_softseq_t;
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sfx_softseq_t *
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sfx_find_softseq(const char *name);
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/* Finds a given or default software sequencer
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** Parameters: (const char *) name: Name of the sequencer to look up, or NULL for default
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** Returns : (sfx_softseq_t *) The requested sequencer, or NULL if not found
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*/
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#endif /* !defined(SFX_SOFTSEQ_H_) */
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