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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.
*
* $URL$
* $Id$
*
*/
#include "sci/tools.h"
#include "sci/sfx/sequencer.h"
#include "sci/sfx/device.h"
#include "sci/sfx/seq/instrument-map.h"
namespace Sci {
static midi_writer_t *writer = NULL;
static int
midi_gm_open(int patch_len, byte *data, int patch2_len, byte *data2, void *device) {
sfx_instrument_map_t *instrument_map = sfx_instrument_map_load_sci(data, patch_len);
if (!instrument_map) {
fprintf(stderr, "[GM] No GM instrument map found, trying MT-32 instrument map..\n");
instrument_map = sfx_instrument_map_mt32_to_gm(data2, patch2_len);
}
writer = sfx_mapped_writer((midi_writer_t *) device, instrument_map);
if (!writer)
return SFX_ERROR;
if (writer->reset_timer)
writer->reset_timer(writer);
return SFX_OK;
}
static int
midi_gm_close(void) {
return SFX_OK;
}
static int
midi_gm_event(byte command, int argc, byte *argv) {
byte data[4];
assert(argc < 4);
data[0] = command;
memcpy(data + 1, argv, argc);
writer->write(writer, data, argc + 1);
return SFX_OK;
}
static int
midi_gm_delay(int ticks) {
writer->delay(writer, ticks);
return SFX_OK;
}
static int
midi_gm_reset_timer(uint32 ts) {
writer->reset_timer(writer);
return SFX_OK;
}
#define MIDI_MASTER_VOLUME_LEN 8
static int
midi_gm_volume(uint8 volume) {
byte data[MIDI_MASTER_VOLUME_LEN] = {
0xf0,
0x7f,
0x7f,
0x04,
0x01,
volume,
volume,
0xf7
};
writer->write(writer, data, MIDI_MASTER_VOLUME_LEN);
if (writer->flush)
writer->flush(writer);
return SFX_OK;
}
static int
midi_gm_allstop(void) {
byte data[3] = { 0xb0,
0x78, /* all sound off */
0
};
int i;
/* All sound off on all channels */
for (i = 0; i < 16; i++) {
data[0] = 0xb0 | i;
writer->write(writer, data, 3);
}
if (writer->flush)
writer->flush(writer);
return SFX_OK;
}
static int
midi_gm_reverb(int reverb) {
byte data[3] = { 0xb0,
91, /* set reverb */
reverb
};
int i;
/* Set reverb on all channels */
for (i = 0; i < 16; i++)
if (i != 9) {
data[0] = 0xb0 | i;
writer->write(writer, data, 3);
}
if (writer->flush)
writer->flush(writer);
return SFX_OK;
}
static int
midi_gm_set_option(char *x, char *y) {
return SFX_ERROR;
}
sfx_sequencer_t sfx_sequencer_gm = {
"General MIDI",
"0.1",
SFX_DEVICE_MIDI,
&midi_gm_set_option,
&midi_gm_open,
&midi_gm_close,
&midi_gm_event,
&midi_gm_delay,
&midi_gm_reset_timer,
&midi_gm_allstop,
&midi_gm_volume,
&midi_gm_reverb,
004, /* patch.004 */
001, /* patch.001 */
0x01, /* playflag */
1, /* do play rhythm */
64, /* max polyphony */
0 /* no write-ahead needed inherently */
};
} // End of namespace Sci
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