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engines/scumm/imuse/sysex_samnmax.cpp

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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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+#include "common/endian.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_SamNMax
+#include "scumm/imuse/imuse_internal.h"
+
+namespace Scumm {
+
+extern void sysexHandler_Scumm(Player *, const byte *, uint16);
+
+void sysexHandler_SamNMax(Player *player, const byte *msg, uint16 len) {
+	byte a;
+
+	IMuseInternal *se = player->_se;
+	const byte *p = msg;
+
+	switch (*p++) {
+	case 0:
+		// Trigger Event
+		// Triggers are set by doCommand(ImSetTrigger).
+		// When a SysEx marker is encountered whose sound
+		// ID and marker ID match what was set by ImSetTrigger,
+		// something magical is supposed to happen....
+		for (a = 0; a < ARRAYSIZE(se->_snm_triggers); ++a) {
+			if (se->_snm_triggers[a].sound == player->_id &&
+			        se->_snm_triggers[a].id == *p) {
+				se->_snm_triggers[a].sound = se->_snm_triggers[a].id = 0;
+				se->doCommand(8, se->_snm_triggers[a].command);
+				break;
+			}
+		}
+		break;
+
+	case 1:
+		// maybe_jump.
+		if (player->_scanning)
+			break;
+		player->maybe_jump(p[0], p[1] - 1, (READ_BE_UINT16(p + 2) - 1) * 4 + p[4], ((p[5] * TICKS_PER_BEAT) >> 2) + p[6]);
+		break;
+
+	default:
+		sysexHandler_Scumm(player, msg, len);
+	}
+}
+
+} // End of namespace Scumm