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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.
*/
#include "common/endian.h"
#include "common/textconsole.h"
#include "common/util.h"
/*
* SysEx command handlers must have full access to the
* internal IMuse implementation classes. Before including
* the relevant header file, two things must happen:
* 1. A function declaration must be made.
* 2. The following #define must be established:
* #define SYSEX_CALLBACK_FUNCTION functionName
*/
#define SYSEX_CALLBACK_FUNCTION sysexHandler_Scumm
#include "scumm/imuse/imuse_internal.h"
namespace Scumm {
void sysexHandler_Scumm(Player *player, const byte *msg, uint16 len) {
Part *part;
byte a;
byte buf[128];
IMuseInternal *se = player->_se;
const byte *p = msg;
byte code = 0;
switch (code = *p++) {
case 0:
// Allocate new part.
// There are 8 bytes (after decoding!) of useful information here.
// Here is what we know about them so far:
// BYTE 0: Channel #
// BYTE 1: BIT 01(0x01): Part on?(1 = yes)
// BIT 02(0x02): Reverb? (1 = yes) [bug #1088045]
// BYTE 2: Priority adjustment
// BYTE 3: Volume [guessing]
// BYTE 4: Pan [bug #1088045]
// BYTE 5: BIT 8(0x80): Percussion?(1 = yes) [guessed?]
// BYTE 5: Transpose, if set to 0x80(=-1) it means no transpose
// BYTE 6: Detune
// BYTE 7: Pitchbend factor [bug #1088045]
// BYTE 8: Program
part = player->getPart(p[0] & 0x0F);
player->decode_sysex_bytes(p + 1, buf + 1, len - 1);
if (part) {
part->set_onoff(buf[1] & 0x01);
part->effectLevel((buf[1] & 0x02) ? 127 : 0);
part->set_pri(buf[2]);
part->volume(buf[3]);
part->set_pan(buf[4]);
part->_percussion = player->_supportsPercussion ? ((buf[5] & 0x80) > 0) : false;
part->set_transpose(buf[5]);
part->set_detune(buf[6]);
part->pitchBendFactor(buf[7]);
if (part->_percussion) {
if (part->_mc) {
part->off();
se->reallocateMidiChannels(player->_midi);
}
} else {
if (player->_isMIDI) {
// Even in cases where a program does not seem to be specified,
// i.e. bytes 15 and 16 are 0, we send a program change because
// 0 is a valid program number. MI2 tests show that in such
// cases, a regular program change message always seems to follow
// anyway.
part->_instrument.program(buf[8], player->_isMT32);
} else {
// Like the original we set up the instrument data of the
// specified program here too. In case the global
// instrument data is not loaded already, this will take
// care of setting a default instrument too.
se->copyGlobalInstrument(buf[8], &part->_instrument);
}
part->sendAll();
}
}
break;
case 1:
// Shut down a part. [Bug 1088045, comments]
part = player->getPart(p[0]);
if (part != NULL)
part->uninit();
break;
case 2: // Start of song. Ignore for now.
break;
case 16: // AdLib instrument definition(Part)
a = *p++ & 0x0F;
++p; // Skip hardware type
part = player->getPart(a);
if (part) {
if (len == 62 || len == 48) {
player->decode_sysex_bytes(p, buf, len - 2);
part->set_instrument((byte *)buf);
} else {
part->programChange(254); // Must be invalid, but not 255 (which is reserved)
}
}
break;
case 17: // AdLib instrument definition(Global)
p += 2; // Skip hardware type and... whatever came right before it
a = *p++;
player->decode_sysex_bytes(p, buf, len - 3);
if (len == 63 || len == 49)
se->setGlobalInstrument(a, buf);
break;
case 33: // Parameter adjust
a = *p++ & 0x0F;
++p; // Skip hardware type
player->decode_sysex_bytes(p, buf, len - 2);
part = player->getPart(a);
if (part)
part->set_param(READ_BE_UINT16(buf), READ_BE_UINT16(buf + 2));
break;
case 48: // Hook - jump
if (player->_scanning)
break;
player->decode_sysex_bytes(p + 1, buf, len - 1);
player->maybe_jump(buf[0], READ_BE_UINT16(buf + 1), READ_BE_UINT16(buf + 3), READ_BE_UINT16(buf + 5));
break;
case 49: // Hook - global transpose
player->decode_sysex_bytes(p + 1, buf, len - 1);
player->maybe_set_transpose(buf);
break;
case 50: // Hook - part on/off
buf[0] = *p++ & 0x0F;
player->decode_sysex_bytes(p, buf + 1, len - 1);
player->maybe_part_onoff(buf);
break;
case 51: // Hook - set volume
buf[0] = *p++ & 0x0F;
player->decode_sysex_bytes(p, buf + 1, len - 1);
player->maybe_set_volume(buf);
break;
case 52: // Hook - set program
buf[0] = *p++ & 0x0F;
player->decode_sysex_bytes(p, buf + 1, len - 1);
player->maybe_set_program(buf);
break;
case 53: // Hook - set transpose
buf[0] = *p++ & 0x0F;
player->decode_sysex_bytes(p, buf + 1, len - 1);
player->maybe_set_transpose_part(buf);
break;
case 64: // Marker
p++;
len--;
while (len--) {
se->handle_marker(player->_id, *p++);
}
break;
case 80: // Loop
player->decode_sysex_bytes(p + 1, buf, len - 1);
player->setLoop(READ_BE_UINT16(buf), READ_BE_UINT16(buf + 2),
READ_BE_UINT16(buf + 4), READ_BE_UINT16(buf + 6),
READ_BE_UINT16(buf + 8));
break;
case 81: // End loop
player->clearLoop();
break;
case 96: // Set instrument
part = player->getPart(p[0] & 0x0F);
a = (p[1] & 0x0F) << 12 | (p[2] & 0x0F) << 8 | (p[3] & 0x0F) << 4 | (p[4] & 0x0F);
if (part)
part->set_instrument(a);
break;
default:
error("Unknown SysEx command %d", (int)code);
}
}
} // End of namespace Scumm
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