/****************************************************************************
*
*                   Digital Sound Interface Kit (DSIK)
*                            Version 2.00
*
*                           by Carlos Hasan
*
* Filename:     import.h
* Version:      Revision 1.3
*
* Language:     WATCOM C
* Environment:  IBM PC (DOS/4GW)
*
* Description:  External music modules import routines.
*
* Revision History:
* ----------------
*
* Revision 1.3  94/11/17  16:58:20  chv
* Added Composer 669 and Scream Tracker 2.0 import routines
*
* Revision 1.2  94/11/08  15:10:42  chv
* Added Amiga IFF/8SVX sample file import routines
*
* Revision 1.1  94/10/26  13:12:43  chv
* Added Multitracker MTM modules import routines
*
* Revision 1.0  94/08/22  16:09:24  chv
* Initial revision
*
****************************************************************************/

#ifndef __IMPORT_H
#define __IMPORT_H

#ifndef __AUDIO_H
#include <audio.h>
#endif

/* supported file formats */

#define FORM_DSM    0x00            /* RIFF/DSMF module file */
#define FORM_MOD    0x01            /* Protracker/Fastracker modules */
#define FORM_S3M    0x02            /* Scream Tracker 3.0 modules */
#define FORM_MTM    0x03            /* Multitracker 1.0 modules */
#define FORM_669    0x04            /* Composer 669 modules */
#define FORM_STM    0x05            /* Scream Tracker 2.0 modules */

#define FORM_WAV    0x80            /* Windows WAVE PCM files */
#define FORM_VOC    0x81            /* Creative Labs Voice Files */
#define FORM_IFF    0x82            /* Amiga IFF/8SVX sample files */
#define FORM_RAW    0x83            /* 8-bit mono RAW sample files */


/* Protracker/Fastracker (MOD) file format */

#define MOD_MK      0x2E4B2E4DL
#define MOD_FLT4    0x34544C46L
#define MOD_FLT8    0x38544C46L
#define MOD_6CHN    0x4E484336L
#define MOD_8CHN    0x4E484338L

#pragma pack (1)

typedef struct {
    char    SampleName[22];
    word    Length;
    byte    Finetune;
    byte    Volume;
    word    LoopStart;
    word    LoopLength;
} MODSample;

typedef struct {
    char    SongName[20];
    MODSample Samples[31];
    byte    NumOrders;
    byte    ReStart;
    byte    Orders[128];
    dword   Magic;
} MODSong;


/* Scream Tracker 3.0 (S3M) file format */

#define S3M_SCRM    0x4D524353L
#define S3M_SCRS    0x53524353L

typedef struct {
    byte    Type;
    char    FileName[13];
    word    DataPtr;
    dword   Length;
    dword   LoopStart;
    dword   LoopEnd;
    byte    Volume;
    byte    LibDisk;
    byte    Pack;
    byte    Flags;
    dword   Rate;
    char    Pad0[12];
    char    SampleName[28];
    dword   Magic;
} S3MSample;

typedef struct {
    char    SongName[28];
    byte    EofMark;
    byte    SongType;
    word    Pad0;
    word    NumOrders;
    word    NumSamples;
    word    NumPatterns;
    word    Flags;
    word    Tracker;
    word    FileFormat;
    dword   Magic;
    byte    GlobalVolume;
    byte    Tempo;
    byte    BPM;
    byte    MasterVolume;
    byte    UltraClick;
    byte    DefPan;
    byte    Pad1[8];
    word    Special;
    byte    ChanMap[32];
} S3MSong;


/* Multitracker 1.0 (MTM) file format */

#define MTM_MAGIC   0x104D544DL
#define MTM_MASK    0xF0FFFFFFL

typedef struct {
    dword   Magic;
    char    SongName[20];
    word    NumTracks;
    byte    LastPattern;
    byte    LastOrder;
    word    CommentLength;
    byte    NumSamples;
    byte    Flags;
    byte    BeatsPerTrack;
    byte    NumChans;
    byte    PanPos[32];
} MTMSong;

typedef struct {
    char    SampleName[22];
    dword   Length;
    dword   LoopStart;
    dword   LoopEnd;
    byte    Finetune;
    byte    Volume;
    byte    Flags;
} MTMSample;

typedef struct {
    byte    Data[192];
} MTMTrack;


/* Composer 669 file format */

#define GG9_MAGIC   0x6669

typedef struct {
    word    Magic;
    char    SongName[108];
    byte    NumSamples;
    byte    NumPatterns;
    byte    ReStart;
    byte    Orders[128];
    byte    Tempos[128];
    byte    Breaks[128];
} GG9Song;

typedef struct {
    char    FileName[13];
    dword   Length;
    dword   LoopStart;
    dword   LoopEnd;
} GG9Sample;


/* Scream Tracker 2.0 (STM) modules */

#define STM_TRACKER "!Scream!"

typedef struct {
    char    FileName[13];
    byte    LibDisk;
    word    DataPtr;
    word    Length;
    word    LoopStart;
    word    LoopEnd;
    byte    Volume;
    byte    Pad0;
    word    Rate;
    byte    Pad1[6];
} STMSample;

typedef struct {
    char    SongName[20];
    char    Tracker[8];
    byte    EofMark;
    byte    FileType;
    word    TrackerVer;
    byte    InitTempo;
    byte    NumPatterns;
    byte    GlobalVolume;
    byte    Pad[13];
    STMSample Samples[31];
    byte    Orders[128];
} STMSong;


/* Creative Labs Voice (VOC) file format */

#define VOC_HDR         "Creative Voice File\32"

#define VOC_TERM        0
#define VOC_DATA        1
#define VOC_CONTINUE    2
#define VOC_SILENCE     3
#define VOC_MARK        4
#define VOC_TEXT        5
#define VOC_REPEAT      6
#define VOC_ENDREPEAT   7
#define VOC_EXTINFO     8

#define VOC_FMT_8BITS   0
#define VOC_FMT_4BITS   1
#define VOC_FMT_26BITS  2
#define VOC_FMT_2BITS   3

#define VOC_MODE_MONO   0
#define VOC_MODE_STEREO 1

typedef struct {
    byte    Magic[20];
    word    BlockPos;
    word    Version;
    word    VersionCheck;
} VocHeader;

typedef struct {
    byte    Type;
    byte    Size[3];
} VocBlock;

typedef struct {
    byte    TimeConst;
    byte    Format;
} VocData;

typedef struct {
    word    TimeConst;
    byte    Pack;
    byte    Mode;
} VocExtInfo;


/* Amiga IFF/8SVX file format */

#define IFF_FORM    0x4D524F46L
#define IFF_8SVX    0x58565338L
#define IFF_VHDR    0x52444856L
#define IFF_ANNO    0x4F4E4E41L
#define IFF_NAME    0x454D414EL
#define IFF_CHAN    0x4E414843L
#define IFF_BODY    0x59444F42L

#define WSWAP(w)    ((((w)&0xFF)<<8)|(((w)>>8)&0xFF))
#define LSWAP(l)    ((WSWAP((l)&0xFFFF)<<16)|(WSWAP((l)>>16)))

typedef struct {
    dword   ID;
    dword   Length;
    dword   Type;
} IffHeader;

typedef struct {
    dword   ID;
    dword   Length;
} IffBlock;

typedef struct {
    byte    Pad0[12];
    word    Rate;
    byte    Pad1;
    byte    Format;
    byte    Pad2[4];
} IffVHdr;

#pragma noalign (IffChan)
typedef struct {
    dword   Channels;
} IffChan;

#pragma pack (4)

#ifdef  __cplusplus
extern "C" {
#endif

/* Import routines API prototypes */

DSM    *dImportModule(char *Filename, int Form);
Sample *dImportSample(char *Filename, int Form);
DSM    *dImportModuleFile(int Handle, long Length, int Form);
Sample *dImportSampleFile(int Handle, long Length, int Form);

#ifdef  __cplusplus
}
#endif

/* Register calling convention used by the API routines */

#pragma aux dImportModule     "_*" parm [eax] [edx];
#pragma aux dImportSample     "_*" parm [eax] [edx];
#pragma aux dImportModuleFile "_*" parm [eax] [edx] [ebx];
#pragma aux dImportSampleFile "_*" parm [eax] [edx] [ebx];

#endif