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load_mdl.cpp
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load_mdl.cpp
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/*
* This source code is public domain.
*
* Authors: Olivier Lapicque <[email protected]>
*/
//////////////////////////////////////////////
// DigiTracker (MDL) module loader //
//////////////////////////////////////////////
#include "stdafx.h"
#include "sndfile.h"
//#pragma warning(disable:4244)
typedef struct MDLSONGHEADER
{
DWORD id; // "DMDL" = 0x4C444D44
BYTE version;
} MDLSONGHEADER;
typedef struct MDLINFOBLOCK
{
CHAR songname[32];
CHAR composer[20];
WORD norders;
WORD repeatpos;
BYTE globalvol;
BYTE speed;
BYTE tempo;
BYTE channelinfo[32];
BYTE seq[256];
} MDLINFOBLOCK;
typedef struct MDLPATTERNDATA
{
BYTE channels;
BYTE lastrow; // nrows = lastrow+1
CHAR name[16];
WORD data[1];
} MDLPATTERNDATA;
void ConvertMDLCommand(MODCOMMAND *m, UINT eff, UINT data)
//--------------------------------------------------------
{
UINT command = 0, param = data;
switch(eff)
{
case 0x01: command = CMD_PORTAMENTOUP; break;
case 0x02: command = CMD_PORTAMENTODOWN; break;
case 0x03: command = CMD_TONEPORTAMENTO; break;
case 0x04: command = CMD_VIBRATO; break;
case 0x05: command = CMD_ARPEGGIO; break;
case 0x07: command = (param < 0x20) ? CMD_SPEED : CMD_TEMPO; break;
case 0x08: command = CMD_PANNING8; param <<= 1; break;
case 0x0B: command = CMD_POSITIONJUMP; break;
case 0x0C: command = CMD_GLOBALVOLUME; break;
case 0x0D: command = CMD_PATTERNBREAK; param = (data & 0x0F) + (data>>4)*10; break;
case 0x0E:
command = CMD_S3MCMDEX;
switch(data & 0xF0)
{
case 0x00: command = 0; break; // What is E0x in MDL (there is a bunch) ?
case 0x10: if (param & 0x0F) { param |= 0xF0; command = CMD_PANNINGSLIDE; } else command = 0; break;
case 0x20: if (param & 0x0F) { param = (param << 4) | 0x0F; command = CMD_PANNINGSLIDE; } else command = 0; break;
case 0x30: param = (data & 0x0F) | 0x10; break; // glissando
case 0x40: param = (data & 0x0F) | 0x30; break; // vibrato waveform
case 0x60: param = (data & 0x0F) | 0xB0; break;
case 0x70: param = (data & 0x0F) | 0x40; break; // tremolo waveform
case 0x90: command = CMD_RETRIG; param &= 0x0F; break;
case 0xA0: param = (data & 0x0F) << 4; command = CMD_GLOBALVOLSLIDE; break;
case 0xB0: param = data & 0x0F; command = CMD_GLOBALVOLSLIDE; break;
case 0xF0: param = ((data >> 8) & 0x0F) | 0xA0; break;
}
break;
case 0x0F: command = CMD_SPEED; break;
case 0x10: if ((param & 0xF0) != 0xE0) { command = CMD_VOLUMESLIDE; if ((param & 0xF0) == 0xF0) param = ((param << 4) | 0x0F); else param >>= 2; } break;
case 0x20: if ((param & 0xF0) != 0xE0) { command = CMD_VOLUMESLIDE; if ((param & 0xF0) != 0xF0) param >>= 2; } break;
case 0x30: command = CMD_RETRIG; break;
case 0x40: command = CMD_TREMOLO; break;
case 0x50: command = CMD_TREMOR; break;
case 0xEF: if (param > 0xFF) param = 0xFF; command = CMD_OFFSET; break;
}
if (command)
{
m->command = command;
m->param = param;
}
}
void UnpackMDLTrack(MODCOMMAND *pat, UINT nChannels, UINT nRows, UINT nTrack, const BYTE *lpTracks)
//-------------------------------------------------------------------------------------------------
{
MODCOMMAND cmd, *m = pat;
UINT len = *((WORD *)lpTracks);
UINT pos = 0, row = 0, i;
lpTracks += 2;
for (UINT ntrk=1; ntrk<nTrack; ntrk++)
{
lpTracks += len;
len = *((WORD *)lpTracks);
lpTracks += 2;
}
cmd.note = cmd.instr = 0;
cmd.volcmd = cmd.vol = 0;
cmd.command = cmd.param = 0;
while ((row < nRows) && (pos < len))
{
UINT xx;
BYTE b = lpTracks[pos++];
xx = b >> 2;
switch(b & 0x03)
{
case 0x01:
for (i=0; i<=xx; i++)
{
if (row) *m = *(m-nChannels);
m += nChannels;
row++;
if (row >= nRows) break;
}
break;
case 0x02:
if (xx < row) *m = pat[nChannels*xx];
m += nChannels;
row++;
break;
case 0x03:
{
cmd.note = (xx & 0x01) ? lpTracks[pos++] : 0;
cmd.instr = (xx & 0x02) ? lpTracks[pos++] : 0;
cmd.volcmd = cmd.vol = 0;
cmd.command = cmd.param = 0;
if ((cmd.note < NOTE_MAX-12) && (cmd.note)) cmd.note += 12;
UINT volume = (xx & 0x04) ? lpTracks[pos++] : 0;
UINT commands = (xx & 0x08) ? lpTracks[pos++] : 0;
UINT command1 = commands & 0x0F;
UINT command2 = commands & 0xF0;
UINT param1 = (xx & 0x10) ? lpTracks[pos++] : 0;
UINT param2 = (xx & 0x20) ? lpTracks[pos++] : 0;
if ((command1 == 0x0E) && ((param1 & 0xF0) == 0xF0) && (!command2))
{
param1 = ((param1 & 0x0F) << 8) | param2;
command1 = 0xEF;
command2 = param2 = 0;
}
if (volume)
{
cmd.volcmd = VOLCMD_VOLUME;
cmd.vol = (volume+1) >> 2;
}
ConvertMDLCommand(&cmd, command1, param1);
if ((cmd.command != CMD_SPEED)
&& (cmd.command != CMD_TEMPO)
&& (cmd.command != CMD_PATTERNBREAK))
ConvertMDLCommand(&cmd, command2, param2);
*m = cmd;
m += nChannels;
row++;
}
break;
// Empty Slots
default:
row += xx+1;
m += (xx+1)*nChannels;
if (row >= nRows) break;
}
}
}
BOOL CSoundFile::ReadMDL(const BYTE *lpStream, DWORD dwMemLength)
//---------------------------------------------------------------
{
DWORD dwMemPos, dwPos, blocklen, dwTrackPos;
const MDLSONGHEADER *pmsh = (const MDLSONGHEADER *)lpStream;
const MDLINFOBLOCK *pmib;
const MDLPATTERNDATA *pmpd;
UINT i,j, norders = 0, npatterns = 0, ntracks = 0;
UINT ninstruments = 0, nsamples = 0;
WORD block;
WORD patterntracks[MAX_PATTERNS*32];
BYTE smpinfo[MAX_SAMPLES];
BYTE insvolenv[MAX_INSTRUMENTS];
BYTE inspanenv[MAX_INSTRUMENTS];
LPCBYTE pvolenv, ppanenv, ppitchenv;
UINT nvolenv, npanenv, npitchenv;
if ((!lpStream) || (dwMemLength < 1024)) return FALSE;
if ((pmsh->id != 0x4C444D44) || ((pmsh->version & 0xF0) > 0x10)) return FALSE;
memset(patterntracks, 0, sizeof(patterntracks));
memset(smpinfo, 0, sizeof(smpinfo));
memset(insvolenv, 0, sizeof(insvolenv));
memset(inspanenv, 0, sizeof(inspanenv));
dwMemPos = 5;
dwTrackPos = 0;
pvolenv = ppanenv = ppitchenv = NULL;
nvolenv = npanenv = npitchenv = 0;
m_nSamples = m_nInstruments = 0;
while (dwMemPos+6 < dwMemLength)
{
block = *((WORD *)(lpStream+dwMemPos));
blocklen = *((DWORD *)(lpStream+dwMemPos+2));
dwMemPos += 6;
if (dwMemPos + blocklen > dwMemLength)
{
if (dwMemPos == 11) return FALSE;
break;
}
switch(block)
{
// IN: infoblock
case 0x4E49:
pmib = (MDLINFOBLOCK *)(lpStream+dwMemPos);
memcpy(m_szNames[0], pmib->songname, 32);
norders = pmib->norders;
if (norders > MAX_ORDERS) norders = MAX_ORDERS;
m_nRestartPos = pmib->repeatpos;
m_nDefaultGlobalVolume = pmib->globalvol;
m_nDefaultTempo = pmib->tempo;
m_nDefaultSpeed = pmib->speed;
m_nChannels = 4;
for (i=0; i<32; i++)
{
ChnSettings[i].nVolume = 64;
ChnSettings[i].nPan = (pmib->channelinfo[i] & 0x7F) << 1;
if (pmib->channelinfo[i] & 0x80)
ChnSettings[i].dwFlags |= CHN_MUTE;
else
m_nChannels = i+1;
}
for (j=0; j<norders; j++) Order[j] = pmib->seq[j];
break;
// ME: song message
case 0x454D:
if (blocklen)
{
if (m_lpszSongComments) delete [] m_lpszSongComments;
m_lpszSongComments = new char[blocklen];
if (m_lpszSongComments)
{
memcpy(m_lpszSongComments, lpStream+dwMemPos, blocklen);
m_lpszSongComments[blocklen-1] = 0;
}
}
break;
// PA: Pattern Data
case 0x4150:
npatterns = lpStream[dwMemPos];
if (npatterns > MAX_PATTERNS) npatterns = MAX_PATTERNS;
dwPos = dwMemPos + 1;
for (i=0; i<npatterns; i++)
{
if (dwPos+18 >= dwMemLength) break;
pmpd = (MDLPATTERNDATA *)(lpStream + dwPos);
if (pmpd->channels > 32) break;
PatternSize[i] = pmpd->lastrow+1;
if (m_nChannels < pmpd->channels) m_nChannels = pmpd->channels;
dwPos += 18 + 2*pmpd->channels;
for (j=0; j<pmpd->channels; j++)
{
patterntracks[i*32+j] = pmpd->data[j];
}
}
break;
// TR: Track Data
case 0x5254:
if (dwTrackPos) break;
ntracks = *((WORD *)(lpStream+dwMemPos));
dwTrackPos = dwMemPos+2;
break;
// II: Instruments
case 0x4949:
ninstruments = lpStream[dwMemPos];
dwPos = dwMemPos+1;
for (i=0; i<ninstruments; i++)
{
UINT nins = lpStream[dwPos];
if ((nins >= MAX_INSTRUMENTS) || (!nins)) break;
if (m_nInstruments < nins) m_nInstruments = nins;
if (!Headers[nins])
{
UINT note = 12;
if ((Headers[nins] = new INSTRUMENTHEADER) == NULL) break;
INSTRUMENTHEADER *penv = Headers[nins];
memset(penv, 0, sizeof(INSTRUMENTHEADER));
memcpy(penv->name, lpStream+dwPos+2, 32);
penv->nGlobalVol = 64;
penv->nPPC = 5*12;
for (j=0; j<lpStream[dwPos+1]; j++)
{
const BYTE *ps = lpStream+dwPos+34+14*j;
while ((note < (UINT)(ps[1]+12)) && (note < NOTE_MAX))
{
penv->NoteMap[note] = note+1;
if (ps[0] < MAX_SAMPLES)
{
int ismp = ps[0];
penv->Keyboard[note] = ps[0];
Ins[ismp].nVolume = ps[2];
Ins[ismp].nPan = ps[4] << 1;
Ins[ismp].nVibType = ps[11];
Ins[ismp].nVibSweep = ps[10];
Ins[ismp].nVibDepth = ps[9];
Ins[ismp].nVibRate = ps[8];
}
penv->nFadeOut = (ps[7] << 8) | ps[6];
if (penv->nFadeOut == 0xFFFF) penv->nFadeOut = 0;
note++;
}
// Use volume envelope ?
if (ps[3] & 0x80)
{
penv->dwFlags |= ENV_VOLUME;
insvolenv[nins] = (ps[3] & 0x3F) + 1;
}
// Use panning envelope ?
if (ps[5] & 0x80)
{
penv->dwFlags |= ENV_PANNING;
inspanenv[nins] = (ps[5] & 0x3F) + 1;
}
}
}
dwPos += 34 + 14*lpStream[dwPos+1];
}
for (j=1; j<=m_nInstruments; j++) if (!Headers[j])
{
Headers[j] = new INSTRUMENTHEADER;
if (Headers[j]) memset(Headers[j], 0, sizeof(INSTRUMENTHEADER));
}
break;
// VE: Volume Envelope
case 0x4556:
if ((nvolenv = lpStream[dwMemPos]) == 0) break;
if (dwMemPos + nvolenv*32 + 1 <= dwMemLength) pvolenv = lpStream + dwMemPos + 1;
break;
// PE: Panning Envelope
case 0x4550:
if ((npanenv = lpStream[dwMemPos]) == 0) break;
if (dwMemPos + npanenv*32 + 1 <= dwMemLength) ppanenv = lpStream + dwMemPos + 1;
break;
// FE: Pitch Envelope
case 0x4546:
if ((npitchenv = lpStream[dwMemPos]) == 0) break;
if (dwMemPos + npitchenv*32 + 1 <= dwMemLength) ppitchenv = lpStream + dwMemPos + 1;
break;
// IS: Sample Infoblock
case 0x5349:
nsamples = lpStream[dwMemPos];
dwPos = dwMemPos+1;
for (i=0; i<nsamples; i++, dwPos += 59)
{
UINT nins = lpStream[dwPos];
if ((nins >= MAX_SAMPLES) || (!nins)) continue;
if (m_nSamples < nins) m_nSamples = nins;
MODINSTRUMENT *pins = &Ins[nins];
memcpy(m_szNames[nins], lpStream+dwPos+1, 32);
memcpy(pins->name, lpStream+dwPos+33, 8);
pins->nC4Speed = *((DWORD *)(lpStream+dwPos+41));
pins->nLength = *((DWORD *)(lpStream+dwPos+45));
pins->nLoopStart = *((DWORD *)(lpStream+dwPos+49));
pins->nLoopEnd = pins->nLoopStart + *((DWORD *)(lpStream+dwPos+53));
if (pins->nLoopEnd > pins->nLoopStart) pins->uFlags |= CHN_LOOP;
pins->nGlobalVol = 64;
if (lpStream[dwPos+58] & 0x01)
{
pins->uFlags |= CHN_16BIT;
pins->nLength >>= 1;
pins->nLoopStart >>= 1;
pins->nLoopEnd >>= 1;
}
if (lpStream[dwPos+58] & 0x02) pins->uFlags |= CHN_PINGPONGLOOP;
smpinfo[nins] = (lpStream[dwPos+58] >> 2) & 3;
}
break;
// SA: Sample Data
case 0x4153:
dwPos = dwMemPos;
for (i=1; i<=m_nSamples; i++) if ((Ins[i].nLength) && (!Ins[i].pSample) && (smpinfo[i] != 3) && (dwPos < dwMemLength))
{
MODINSTRUMENT *pins = &Ins[i];
UINT flags = (pins->uFlags & CHN_16BIT) ? RS_PCM16S : RS_PCM8S;
if (!smpinfo[i])
{
dwPos += ReadSample(pins, flags, (LPSTR)(lpStream+dwPos), dwMemLength - dwPos);
} else
{
DWORD dwLen = *((DWORD *)(lpStream+dwPos));
dwPos += 4;
if ((dwLen < dwMemLength) && (dwLen <= dwMemLength - dwPos) && (dwLen > 4))
{
flags = (pins->uFlags & CHN_16BIT) ? RS_MDL16 : RS_MDL8;
ReadSample(pins, flags, (LPSTR)(lpStream+dwPos), dwLen);
}
dwPos += dwLen;
}
}
break;
}
dwMemPos += blocklen;
}
// Unpack Patterns
if ((dwTrackPos) && (npatterns) && (m_nChannels) && (ntracks))
{
for (UINT ipat=0; ipat<npatterns; ipat++)
{
if ((Patterns[ipat] = AllocatePattern(PatternSize[ipat], m_nChannels)) == NULL) break;
for (UINT chn=0; chn<m_nChannels; chn++) if ((patterntracks[ipat*32+chn]) && (patterntracks[ipat*32+chn] <= ntracks))
{
MODCOMMAND *m = Patterns[ipat] + chn;
UnpackMDLTrack(m, m_nChannels, PatternSize[ipat], patterntracks[ipat*32+chn], lpStream+dwTrackPos);
}
}
}
// Set up envelopes
for (UINT iIns=1; iIns<=m_nInstruments; iIns++) if (Headers[iIns])
{
INSTRUMENTHEADER *penv = Headers[iIns];
// Setup volume envelope
if ((nvolenv) && (pvolenv) && (insvolenv[iIns]))
{
LPCBYTE pve = pvolenv;
for (UINT nve=0; nve<nvolenv; nve++, pve+=33) if (pve[0]+1 == insvolenv[iIns])
{
WORD vtick = 1;
penv->nVolEnv = 15;
for (UINT iv=0; iv<15; iv++)
{
if (iv) vtick += pve[iv*2+1];
penv->VolPoints[iv] = vtick;
penv->VolEnv[iv] = pve[iv*2+2];
if (!pve[iv*2+1])
{
penv->nVolEnv = iv+1;
break;
}
}
penv->nVolSustainBegin = penv->nVolSustainEnd = pve[31] & 0x0F;
if (pve[31] & 0x10) penv->dwFlags |= ENV_VOLSUSTAIN;
if (pve[31] & 0x20) penv->dwFlags |= ENV_VOLLOOP;
penv->nVolLoopStart = pve[32] & 0x0F;
penv->nVolLoopEnd = pve[32] >> 4;
}
}
// Setup panning envelope
if ((npanenv) && (ppanenv) && (inspanenv[iIns]))
{
LPCBYTE ppe = ppanenv;
for (UINT npe=0; npe<npanenv; npe++, ppe+=33) if (ppe[0]+1 == inspanenv[iIns])
{
WORD vtick = 1;
penv->nPanEnv = 15;
for (UINT iv=0; iv<15; iv++)
{
if (iv) vtick += ppe[iv*2+1];
penv->PanPoints[iv] = vtick;
penv->PanEnv[iv] = ppe[iv*2+2];
if (!ppe[iv*2+1])
{
penv->nPanEnv = iv+1;
break;
}
}
if (ppe[31] & 0x10) penv->dwFlags |= ENV_PANSUSTAIN;
if (ppe[31] & 0x20) penv->dwFlags |= ENV_PANLOOP;
penv->nPanLoopStart = ppe[32] & 0x0F;
penv->nPanLoopEnd = ppe[32] >> 4;
}
}
}
m_dwSongFlags |= SONG_LINEARSLIDES;
m_nType = MOD_TYPE_MDL;
return TRUE;
}
/////////////////////////////////////////////////////////////////////////
// MDL Sample Unpacking
// MDL Huffman ReadBits compression
WORD MDLReadBits(DWORD &bitbuf, UINT &bitnum, LPBYTE &ibuf, CHAR n)
//-----------------------------------------------------------------
{
WORD v = (WORD)(bitbuf & ((1 << n) - 1) );
bitbuf >>= n;
bitnum -= n;
if (bitnum <= 24)
{
bitbuf |= (((DWORD)(*ibuf++)) << bitnum);
bitnum += 8;
}
return v;
}