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/*
* This source code is public domain.
*
* Authors: Olivier Lapicque <olivierl@jps.net>,
* Adam Goode <adam@evdebs.org> (endian and char fixes for PPC)
*/
//////////////////////////////////////////////
// Oktalyzer (OKT) module loader //
//////////////////////////////////////////////
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "stdafx.h"
#include "sndfile.h"
//#pragma warning(disable:4244)
typedef struct OKTFILEHEADER
{
DWORD okta; // "OKTA"
DWORD song; // "SONG"
DWORD cmod; // "CMOD"
DWORD fixed8;
BYTE chnsetup[8];
DWORD samp; // "SAMP"
DWORD samplen;
} OKTFILEHEADER;
typedef struct OKTSAMPLE
{
CHAR name[20];
DWORD length;
WORD loopstart;
WORD looplen;
BYTE pad1;
BYTE volume;
BYTE pad2;
BYTE pad3;
} OKTSAMPLE;
BOOL CSoundFile::ReadOKT(const BYTE *lpStream, DWORD dwMemLength)
//---------------------------------------------------------------
{
OKTFILEHEADER *pfh = (OKTFILEHEADER *)lpStream;
DWORD dwMemPos = sizeof(OKTFILEHEADER);
UINT nsamples = 0, npatterns = 0, norders = 0;
if ((!lpStream) || (dwMemLength < 1024)) return FALSE;
if ((pfh->okta != 0x41544B4F) || (pfh->song != 0x474E4F53)
|| (pfh->cmod != 0x444F4D43) || (pfh->chnsetup[0]) || (pfh->chnsetup[2])
|| (pfh->chnsetup[4]) || (pfh->chnsetup[6]) || (pfh->fixed8 != 0x08000000)
|| (pfh->samp != 0x504D4153)) return FALSE;
m_nType = MOD_TYPE_OKT;
m_nChannels = 4 + pfh->chnsetup[1] + pfh->chnsetup[3] + pfh->chnsetup[5] + pfh->chnsetup[7];
if (m_nChannels > MAX_CHANNELS) m_nChannels = MAX_CHANNELS;
nsamples = bswapBE32(pfh->samplen) >> 5;
m_nSamples = nsamples;
if (m_nSamples >= MAX_SAMPLES) m_nSamples = MAX_SAMPLES-1;
// Reading samples
for (UINT smp=1; smp <= nsamples; smp++)
{
if (dwMemPos >= dwMemLength) return TRUE;
if (smp < MAX_SAMPLES)
{
OKTSAMPLE *psmp = (OKTSAMPLE *)(lpStream + dwMemPos);
MODINSTRUMENT *pins = &Ins[smp];
memcpy(m_szNames[smp], psmp->name, 20);
pins->uFlags = 0;
pins->nLength = bswapBE32(psmp->length) & ~1;
pins->nLoopStart = bswapBE16(psmp->loopstart);
pins->nLoopEnd = pins->nLoopStart + bswapBE16(psmp->looplen);
if (pins->nLoopStart + 2 < pins->nLoopEnd) pins->uFlags |= CHN_LOOP;
pins->nGlobalVol = 64;
pins->nVolume = psmp->volume << 2;
pins->nC4Speed = 8363;
}
dwMemPos += sizeof(OKTSAMPLE);
}
// SPEE
if (dwMemPos >= dwMemLength) return TRUE;
if (*((DWORD *)(lpStream + dwMemPos)) == 0x45455053)
{
m_nDefaultSpeed = lpStream[dwMemPos+9];
dwMemPos += bswapBE32(*((DWORD *)(lpStream + dwMemPos + 4))) + 8;
}
// SLEN
if (dwMemPos >= dwMemLength) return TRUE;
if (*((DWORD *)(lpStream + dwMemPos)) == 0x4E454C53)
{
npatterns = lpStream[dwMemPos+9];
dwMemPos += bswapBE32(*((DWORD *)(lpStream + dwMemPos + 4))) + 8;
}
// PLEN
if (dwMemPos >= dwMemLength) return TRUE;
if (*((DWORD *)(lpStream + dwMemPos)) == 0x4E454C50)
{
norders = lpStream[dwMemPos+9];
dwMemPos += bswapBE32(*((DWORD *)(lpStream + dwMemPos + 4))) + 8;
}
// PATT
if (dwMemPos >= dwMemLength) return TRUE;
if (*((DWORD *)(lpStream + dwMemPos)) == 0x54544150)
{
UINT orderlen = norders;
if (orderlen >= MAX_ORDERS) orderlen = MAX_ORDERS-1;
for (UINT i=0; i<orderlen; i++) Order[i] = lpStream[dwMemPos+10+i];
for (UINT j=orderlen; j>1; j--) { if (Order[j-1]) break; Order[j-1] = 0xFF; }
dwMemPos += bswapBE32(*((DWORD *)(lpStream + dwMemPos + 4))) + 8;
}
// PBOD
UINT npat = 0;
while ((dwMemPos+10 < dwMemLength) && (*((DWORD *)(lpStream + dwMemPos)) == 0x444F4250))
{
DWORD dwPos = dwMemPos + 10;
UINT rows = lpStream[dwMemPos+9];
if (!rows) rows = 64;
if (npat < MAX_PATTERNS)
{
if ((Patterns[npat] = AllocatePattern(rows, m_nChannels)) == NULL) return TRUE;
MODCOMMAND *m = Patterns[npat];
PatternSize[npat] = rows;
UINT imax = m_nChannels*rows;
for (UINT i=0; i<imax; i++, m++, dwPos+=4)
{
if (dwPos+4 > dwMemLength) break;
const BYTE *p = lpStream+dwPos;
UINT note = p[0];
if (note)
{
m->note = note + 48;
m->instr = p[1] + 1;
}
UINT command = p[2];
UINT param = p[3];
m->param = param;
switch(command)
{
// 0: no effect
case 0:
break;
// 1: Portamento Up
case 1:
case 17:
case 30:
if (param) m->command = CMD_PORTAMENTOUP;
break;
// 2: Portamento Down
case 2:
case 13:
case 21:
if (param) m->command = CMD_PORTAMENTODOWN;
break;
// 10: Arpeggio
case 10:
case 11:
case 12:
m->command = CMD_ARPEGGIO;
break;
// 15: Filter
case 15:
m->command = CMD_MODCMDEX;
m->param = param & 0x0F;
break;
// 25: Position Jump
case 25:
m->command = CMD_POSITIONJUMP;
break;
// 28: Set Speed
case 28:
m->command = CMD_SPEED;
break;
// 31: Volume Control
case 31:
if (param <= 0x40) m->command = CMD_VOLUME; else
if (param <= 0x50) { m->command = CMD_VOLUMESLIDE; m->param &= 0x0F; if (!m->param) m->param = 0x0F; } else
if (param <= 0x60) { m->command = CMD_VOLUMESLIDE; m->param = (param & 0x0F) << 4; if (!m->param) m->param = 0xF0; } else
if (param <= 0x70) { m->command = CMD_MODCMDEX; m->param = 0xB0 | (param & 0x0F); if (!(param & 0x0F)) m->param = 0xBF; } else
if (param <= 0x80) { m->command = CMD_MODCMDEX; m->param = 0xA0 | (param & 0x0F); if (!(param & 0x0F)) m->param = 0xAF; }
break;
}
}
}
npat++;
dwMemPos += bswapBE32(*((DWORD *)(lpStream + dwMemPos + 4))) + 8;
}
// SBOD
UINT nsmp = 1;
while ((dwMemPos+10 < dwMemLength) && (*((DWORD *)(lpStream + dwMemPos)) == 0x444F4253))
{
if (nsmp < MAX_SAMPLES) ReadSample(&Ins[nsmp], RS_PCM8S, (LPSTR)(lpStream+dwMemPos+8), dwMemLength-dwMemPos-8);
dwMemPos += bswapBE32(*((DWORD *)(lpStream + dwMemPos + 4))) + 8;
nsmp++;
}
return TRUE;
}
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