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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)
*/
//////////////////////////////////////////////
// PTM PolyTracker module loader //
//////////////////////////////////////////////
#include "stdafx.h"
#include "sndfile.h"
//#pragma warning(disable:4244)
#pragma pack(1)
typedef struct PTMFILEHEADER
{
CHAR songname[28]; // name of song, asciiz string
CHAR eof; // 26
BYTE version_lo; // 03 version of file, currently 0203h
BYTE version_hi; // 02
BYTE reserved1; // reserved, set to 0
WORD norders; // number of orders (0..256)
WORD nsamples; // number of instruments (1..255)
WORD npatterns; // number of patterns (1..128)
WORD nchannels; // number of channels (voices) used (1..32)
WORD fileflags; // set to 0
WORD reserved2; // reserved, set to 0
DWORD ptmf_id; // song identification, 'PTMF' or 0x464d5450
BYTE reserved3[16]; // reserved, set to 0
BYTE chnpan[32]; // channel panning settings, 0..15, 0 = left, 7 = middle, 15 = right
BYTE orders[256]; // order list, valid entries 0..nOrders-1
WORD patseg[128]; // pattern offsets (*16)
} PTMFILEHEADER, *LPPTMFILEHEADER;
#define SIZEOF_PTMFILEHEADER 608
typedef struct PTMSAMPLE
{
BYTE sampletype; // sample type (bit array)
CHAR filename[12]; // name of external sample file
BYTE volume; // default volume
WORD nC4Spd; // C4 speed
WORD sampleseg; // sample segment (used internally)
WORD fileofs[2]; // offset of sample data
WORD length[2]; // sample size (in bytes)
WORD loopbeg[2]; // start of loop
WORD loopend[2]; // end of loop
WORD gusdata[8];
char samplename[28]; // name of sample, asciiz // changed from CHAR
DWORD ptms_id; // sample identification, 'PTMS' or 0x534d5450
} PTMSAMPLE;
#define SIZEOF_PTMSAMPLE 80
#pragma pack()
BOOL CSoundFile::ReadPTM(const BYTE *lpStream, DWORD dwMemLength)
//---------------------------------------------------------------
{
PTMFILEHEADER pfh = *(LPPTMFILEHEADER)lpStream;
DWORD dwMemPos;
UINT nOrders;
pfh.norders = bswapLE16(pfh.norders);
pfh.nsamples = bswapLE16(pfh.nsamples);
pfh.npatterns = bswapLE16(pfh.npatterns);
pfh.nchannels = bswapLE16(pfh.nchannels);
pfh.fileflags = bswapLE16(pfh.fileflags);
pfh.reserved2 = bswapLE16(pfh.reserved2);
pfh.ptmf_id = bswapLE32(pfh.ptmf_id);
for (UINT j=0; j<128; j++)
{
pfh.patseg[j] = bswapLE16(pfh.patseg[j]);
}
if ((!lpStream) || (dwMemLength < 1024)) return FALSE;
if ((pfh.ptmf_id != 0x464d5450) || (!pfh.nchannels)
|| (pfh.nchannels > 32)
|| (pfh.norders > 256) || (!pfh.norders)
|| (!pfh.nsamples) || (pfh.nsamples > 255)
|| (!pfh.npatterns) || (pfh.npatterns > 128)
|| (SIZEOF_PTMFILEHEADER+pfh.nsamples*SIZEOF_PTMSAMPLE >= (int)dwMemLength)) return FALSE;
memcpy(m_szNames[0], pfh.songname, 28);
m_szNames[0][28] = 0;
m_nType = MOD_TYPE_PTM;
m_nChannels = pfh.nchannels;
m_nSamples = (pfh.nsamples < MAX_SAMPLES) ? pfh.nsamples : MAX_SAMPLES-1;
dwMemPos = SIZEOF_PTMFILEHEADER;
nOrders = (pfh.norders < MAX_ORDERS) ? pfh.norders : MAX_ORDERS-1;
memcpy(Order, pfh.orders, nOrders);
for (UINT ipan=0; ipan<m_nChannels; ipan++)
{
ChnSettings[ipan].nVolume = 64;
ChnSettings[ipan].nPan = ((pfh.chnpan[ipan] & 0x0F) << 4) + 4;
}
for (UINT ismp=0; ismp<m_nSamples; ismp++, dwMemPos += SIZEOF_PTMSAMPLE)
{
MODINSTRUMENT *pins = &Ins[ismp+1];
PTMSAMPLE *psmp = (PTMSAMPLE *)(lpStream+dwMemPos);
lstrcpyn(m_szNames[ismp+1], psmp->samplename, 28);
memcpy(pins->name, psmp->filename, 12);
pins->name[12] = 0;
pins->nGlobalVol = 64;
pins->nPan = 128;
pins->nVolume = psmp->volume << 2;
pins->nC4Speed = bswapLE16(psmp->nC4Spd) << 1;
pins->uFlags = 0;
if ((psmp->sampletype & 3) == 1)
{
UINT smpflg = RS_PCM8D;
DWORD samplepos = psmp->fileofs[1] << 16 +
psmp->fileofs[0];
pins->nLength = bswapLE32(*(LPDWORD)(psmp->length));
pins->nLoopStart = bswapLE32(*(LPDWORD)(psmp->loopbeg));
pins->nLoopEnd = bswapLE32(*(LPDWORD)(psmp->loopend));
samplepos = bswapLE32(samplepos);
if (psmp->sampletype & 4) pins->uFlags |= CHN_LOOP;
if (psmp->sampletype & 8) pins->uFlags |= CHN_PINGPONGLOOP;
if (psmp->sampletype & 16)
{
pins->uFlags |= CHN_16BIT;
pins->nLength >>= 1;
pins->nLoopStart >>= 1;
pins->nLoopEnd >>= 1;
smpflg = RS_PTM8DTO16;
}
if ((pins->nLength) && (samplepos) && (samplepos < dwMemLength))
{
ReadSample(pins, smpflg, (LPSTR)(lpStream+samplepos), dwMemLength-samplepos);
}
}
}
// Reading Patterns
for (UINT ipat=0; ipat<pfh.npatterns; ipat++)
{
dwMemPos = ((UINT)pfh.patseg[ipat]) << 4;
if ((!dwMemPos) || (dwMemPos >= dwMemLength)) continue;
PatternSize[ipat] = 64;
if ((Patterns[ipat] = AllocatePattern(64, m_nChannels)) == NULL) break;
//
MODCOMMAND *m = Patterns[ipat];
for (UINT row=0; ((row < 64) && (dwMemPos < dwMemLength)); )
{
UINT b = lpStream[dwMemPos++];
if (dwMemPos >= dwMemLength) break;
if (b)
{
UINT nChn = b & 0x1F;
if (b & 0x20)
{
if (dwMemPos + 2 > dwMemLength) break;
m[nChn].note = lpStream[dwMemPos++];
m[nChn].instr = lpStream[dwMemPos++];
}
if (b & 0x40)
{
if (dwMemPos + 2 > dwMemLength) break;
m[nChn].command = lpStream[dwMemPos++];
m[nChn].param = lpStream[dwMemPos++];
if ((m[nChn].command == 0x0E) && ((m[nChn].param & 0xF0) == 0x80))
{
m[nChn].command = CMD_S3MCMDEX;
} else
if (m[nChn].command < 0x10)
{
ConvertModCommand(&m[nChn]);
} else
{
switch(m[nChn].command)
{
case 16:
m[nChn].command = CMD_GLOBALVOLUME;
break;
case 17:
m[nChn].command = CMD_RETRIG;
break;
case 18:
m[nChn].command = CMD_FINEVIBRATO;
break;
default:
m[nChn].command = 0;
}
}
}
if (b & 0x80)
{
if (dwMemPos >= dwMemLength) break;
m[nChn].volcmd = VOLCMD_VOLUME;
m[nChn].vol = lpStream[dwMemPos++];
}
} else
{
row++;
m += m_nChannels;
}
}
}
return TRUE;
}
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