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/*
* This source code is public domain.
*
* Authors: Olivier Lapicque <olivierl@jps.net>
*/
////////////////////////////////////////
// Farandole (FAR) module loader //
////////////////////////////////////////
#include "stdafx.h"
#include "sndfile.h"
//#pragma warning(disable:4244)
#define FARFILEMAGIC 0xFE524146 // "FAR"
#pragma pack(1)
typedef struct FARHEADER1
{
DWORD id; // file magic FAR=
CHAR songname[40]; // songname
CHAR magic2[3]; // 13,10,26
WORD headerlen; // remaining length of header in bytes
BYTE version; // 0xD1
BYTE onoff[16];
BYTE edit1[9];
BYTE speed;
BYTE panning[16];
BYTE edit2[4];
WORD stlen;
} FARHEADER1;
typedef struct FARHEADER2
{
BYTE orders[256];
BYTE numpat;
BYTE snglen;
BYTE loopto;
WORD patsiz[256];
} FARHEADER2;
typedef struct FARSAMPLE
{
CHAR samplename[32];
DWORD length;
BYTE finetune;
BYTE volume;
DWORD reppos;
DWORD repend;
BYTE type;
BYTE loop;
} FARSAMPLE;
#pragma pack()
BOOL CSoundFile::ReadFAR(const BYTE *lpStream, DWORD dwMemLength)
//---------------------------------------------------------------
{
FARHEADER1 *pmh1 = (FARHEADER1 *)lpStream;
FARHEADER2 *pmh2;
DWORD dwMemPos = sizeof(FARHEADER1);
UINT headerlen;
BYTE samplemap[8];
if ((!lpStream) || (dwMemLength < 1024) || (pmh1->id != FARFILEMAGIC)
|| (pmh1->magic2[0] != 13) || (pmh1->magic2[1] != 10) || (pmh1->magic2[2] != 26)) return FALSE;
headerlen = pmh1->headerlen;
if ((headerlen >= dwMemLength) || (dwMemPos + pmh1->stlen + sizeof(FARHEADER2) >= dwMemLength)) return FALSE;
// Globals
m_nType = MOD_TYPE_FAR;
m_nChannels = 16;
m_nInstruments = 0;
m_nSamples = 0;
m_nSongPreAmp = 0x20;
m_nDefaultSpeed = pmh1->speed;
m_nDefaultTempo = 80;
m_nDefaultGlobalVolume = 256;
memcpy(m_szNames[0], pmh1->songname, 32);
// Channel Setting
for (UINT nchpan=0; nchpan<16; nchpan++)
{
ChnSettings[nchpan].dwFlags = 0;
ChnSettings[nchpan].nPan = ((pmh1->panning[nchpan] & 0x0F) << 4) + 8;
ChnSettings[nchpan].nVolume = 64;
}
// Reading comment
if (pmh1->stlen)
{
UINT szLen = pmh1->stlen;
if (szLen > dwMemLength - dwMemPos) szLen = dwMemLength - dwMemPos;
if ((m_lpszSongComments = new char[szLen + 1]) != NULL)
{
memcpy(m_lpszSongComments, lpStream+dwMemPos, szLen);
m_lpszSongComments[szLen] = 0;
}
dwMemPos += pmh1->stlen;
}
// Reading orders
pmh2 = (FARHEADER2 *)(lpStream + dwMemPos);
dwMemPos += sizeof(FARHEADER2);
if (dwMemPos >= dwMemLength) return TRUE;
for (UINT iorder=0; iorder<MAX_ORDERS; iorder++)
{
Order[iorder] = (iorder <= pmh2->snglen) ? pmh2->orders[iorder] : 0xFF;
}
m_nRestartPos = pmh2->loopto;
// Reading Patterns
dwMemPos += headerlen - (869 + pmh1->stlen);
if (dwMemPos >= dwMemLength) return TRUE;
WORD *patsiz = (WORD *)pmh2->patsiz;
for (UINT ipat=0; ipat<256; ipat++) if (patsiz[ipat])
{
UINT patlen = patsiz[ipat];
if ((ipat >= MAX_PATTERNS) || (patsiz[ipat] < 2))
{
dwMemPos += patlen;
continue;
}
if (dwMemPos + patlen >= dwMemLength) return TRUE;
UINT rows = (patlen - 2) >> 6;
if (!rows)
{
dwMemPos += patlen;
continue;
}
if (rows > 256) rows = 256;
if (rows < 16) rows = 16;
PatternSize[ipat] = rows;
if ((Patterns[ipat] = AllocatePattern(rows, m_nChannels)) == NULL) return TRUE;
MODCOMMAND *m = Patterns[ipat];
UINT patbrk = lpStream[dwMemPos];
const BYTE *p = lpStream + dwMemPos + 2;
UINT max = rows*16*4;
if (max > patlen-2) max = patlen-2;
for (UINT len=0; len<max; len += 4, m++)
{
BYTE note = p[len];
BYTE ins = p[len+1];
BYTE vol = p[len+2];
BYTE eff = p[len+3];
if (note)
{
m->instr = ins + 1;
m->note = note + 36;
}
if (vol & 0x0F)
{
m->volcmd = VOLCMD_VOLUME;
m->vol = (vol & 0x0F) << 2;
if (m->vol <= 4) m->vol = 0;
}
switch(eff & 0xF0)
{
// 1.x: Portamento Up
case 0x10:
m->command = CMD_PORTAMENTOUP;
m->param = eff & 0x0F;
break;
// 2.x: Portamento Down
case 0x20:
m->command = CMD_PORTAMENTODOWN;
m->param = eff & 0x0F;
break;
// 3.x: Tone-Portamento
case 0x30:
m->command = CMD_TONEPORTAMENTO;
m->param = (eff & 0x0F) << 2;
break;
// 4.x: Retrigger
case 0x40:
m->command = CMD_RETRIG;
m->param = 6 / (1+(eff&0x0F)) + 1;
break;
// 5.x: Set Vibrato Depth
case 0x50:
m->command = CMD_VIBRATO;
m->param = (eff & 0x0F);
break;
// 6.x: Set Vibrato Speed
case 0x60:
m->command = CMD_VIBRATO;
m->param = (eff & 0x0F) << 4;
break;
// 7.x: Vol Slide Up
case 0x70:
m->command = CMD_VOLUMESLIDE;
m->param = (eff & 0x0F) << 4;
break;
// 8.x: Vol Slide Down
case 0x80:
m->command = CMD_VOLUMESLIDE;
m->param = (eff & 0x0F);
break;
// A.x: Port to vol
case 0xA0:
m->volcmd = VOLCMD_VOLUME;
m->vol = ((eff & 0x0F) << 2) + 4;
break;
// B.x: Set Balance
case 0xB0:
m->command = CMD_PANNING8;
m->param = (eff & 0x0F) << 4;
break;
// F.x: Set Speed
case 0xF0:
m->command = CMD_SPEED;
m->param = eff & 0x0F;
break;
default:
if ((patbrk) && (patbrk+1 == (len >> 6)) && (patbrk+1 != rows-1))
{
m->command = CMD_PATTERNBREAK;
patbrk = 0;
}
}
}
dwMemPos += patlen;
}
// Reading samples
if (dwMemPos + 8 >= dwMemLength) return TRUE;
memcpy(samplemap, lpStream+dwMemPos, 8);
dwMemPos += 8;
MODINSTRUMENT *pins = &Ins[1];
for (UINT ismp=0; ismp<64; ismp++, pins++) if (samplemap[ismp >> 3] & (1 << (ismp & 7)))
{
if (dwMemPos + sizeof(FARSAMPLE) > dwMemLength) return TRUE;
FARSAMPLE *pfs = (FARSAMPLE *)(lpStream + dwMemPos);
dwMemPos += sizeof(FARSAMPLE);
m_nSamples = ismp + 1;
memcpy(m_szNames[ismp+1], pfs->samplename, 32);
pins->nLength = pfs->length;
pins->nLoopStart = pfs->reppos;
pins->nLoopEnd = pfs->repend;
pins->nFineTune = 0;
pins->nC4Speed = 8363*2;
pins->nGlobalVol = 64;
pins->nVolume = pfs->volume << 4;
pins->uFlags = 0;
if ((pins->nLength > 3) && (dwMemPos + 4 < dwMemLength))
{
if (pfs->type & 1)
{
pins->uFlags |= CHN_16BIT;
pins->nLength >>= 1;
pins->nLoopStart >>= 1;
pins->nLoopEnd >>= 1;
}
if ((pfs->loop & 8) && (pins->nLoopEnd > 4)) pins->uFlags |= CHN_LOOP;
ReadSample(pins, (pins->uFlags & CHN_16BIT) ? RS_PCM16S : RS_PCM8S,
(LPSTR)(lpStream+dwMemPos), dwMemLength - dwMemPos);
}
dwMemPos += pfs->length;
}
return TRUE;
}
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