WIP for SAGA engine.

 o text formatting is not consistent with rules, just indent utility is too
   dumb for that
 o it does not use OSystem, i.e. it runs on direct SDL calls
 o it may not even compile on your box
 o if you enable it, expect zillions of warnings
 o no sound

Now it runs ITE intro as reinherit did

svn-id: r13564

1 files changed, 117 insertions, 0 deletions

diff --git a/saga/xmidi.h b/saga/xmidi.h
new file mode 100644
index 0000000000..a408cfc74e
--- /dev/null
+++ b/saga/xmidi.h
@@ -0,0 +1,117 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2004 The ScummVM project
+ *
+ * The ReInherit Engine is (C)2000-2003 by Daniel Balsom.
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * $Header$
+ *
+ */
+/*
+ Description:   
+ 
+    XMIDI conversion routines
+
+ Notes: 
+ 
+    Code adapted from XMILoader by Keet ( fox@foxpaws.net ), (C)2000
+*/
+
+#ifndef SAGA_XMIDI_H_
+#define SAGA_XMIDI_H_
+
+namespace Saga {
+
+#define XMIDI_TIMEDIV 0x3C
+
+/* XMIDI/IFF 4CC codes
+\*--------------------------------------------------------------------------*/
+#define IFF_FORMAT_4CC   "FORM"
+#define IFF_CATEGORY_4CC "CAT "
+
+#define XMI_DESC_4CC     "XDIR"
+#define XMI_INFO_4CC     "INFO"
+
+#define XMIDI_DESC_4CC   "XMID"
+#define XMIDI_TIMBRE_4CC "TIMB"
+#define XMIDI_EVENT_4CC  "EVNT"
+
+/* IFF/XMI Data structures
+\*--------------------------------------------------------------------------*/
+
+typedef struct IFF_ID_CHUNK_tag {
+	char id_4cc[4];	/* 4cc */
+	ulong chunk_len;	/* u32_be */
+	char desc_4cc[4];	/* 4cc */
+} IFF_ID_CHUNK;
+
+#define IFF_ID_CHUNK_HEADERLEN 12
+
+typedef struct XMI_INFO_CHUNK_tag {
+	char id_4cc[4];	/* 4cc */
+	ulong chunk_len;	/* u32_be */
+	uint n_tracks;	/* u16_le */
+} XMI_INFO_CHUNK;
+
+typedef struct XMI_TIMB_CHUNK_tag {
+	char id_4cc[4];	/* 4cc */
+	ulong chunk_len;	/* u32_be */
+} XMI_TIMB_CHUNK;
+
+typedef struct XMI_EVENT_CHUNK_tag {
+	char id_4cc[4];	/* 4cc */
+	ulong chunk_len;	/* u32_be */
+} XMI_EVENT_CHUNK;
+
+typedef struct SMF_HEADER_CHUNK_tag {
+	char smf_id[4];	/* u8 */
+	unsigned int smf_header_len;	/* u32_be */
+	unsigned short smf_format;	/* u16_be */
+	unsigned short smf_ntracks;	/* u16_be */
+	union {
+		unsigned short ppqn;	/* u16_be */
+		signed char smpte[2];
+	} time_division;
+} SMF_HEADER_CHUNK;
+
+typedef struct SMF_TRACK_CHUNK_tag {
+	char smf_track_id[4];
+	unsigned int smf_track_len;
+} SMF_TRACK_CHUNK;
+
+#define MIDI_HEADER_LEN 14
+#define MIDI_HEADER_CHUNK_LEN 6
+#define MIDI_TRACK_CHUNK_LEN 8
+
+#define MIDI_HEADER_TAG "MThd"
+#define MIDI_TRACK_TAG  "MTrk"
+
+int XMIDI_ReadXMIHeader(const uchar *XMI_img, const uchar **XMIDI_data, uint *n_tracks);
+int ReadIFF_IDChunk(IFF_ID_CHUNK *chunk, const uchar *read_p, const uchar **read_pp);
+int Print4CC(char *fourcc);
+int XMIDI_ReadEvents(XMIDIEVENT_LIST *event_list, const uchar *event_data, 
+					 size_t event_data_len, uint n_tracks);
+int WriteVLQ_DW(char *write_ptr, DWORD value);
+DWORD ReadVLQ_DW(char *data, DWORD bytes_left, DWORD *value);
+DWORD ReadVLQ2_DW(char *data, DWORD bytes_left, DWORD *value);
+int GetLengthAsVLQ(DWORD data);
+int AddEventToList(XMIDIEVENT_LIST *event_list, int smf_size, int time,
+	    int event, int channel, int sysex_op, int op1, int op2, int op3, int op4);
+int ProcessEventList(XMIDIEVENT_LIST *event_list);
+void PrintMidiOutError(unsigned long err);
+}				// End of namespace Saga
+
+#endif				/* SAGA_XMIDI_H_ */