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gstreamer/gst/modplug/libmodplug/load_med.cpp

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adding modplug Original commit message from CVS: adding modplug
2002-02-28 21:10:42 +00:00
/*
* This source code is public domain.
*
* Authors: Olivier Lapicque <olivierl@jps.net>,
* Adam Goode <adam@evdebs.org> (endian and char fixes for PPC)
*/
#include "stdafx.h"
#include "sndfile.h"
//#define MED_LOG
#ifdef MED_LOG
extern void Log(LPCSTR s, ...);
#endif
//////////////////////////////////////////////////////////
// OctaMed MED file support (import only)
// flags
#define MMD_FLAG_FILTERON 0x1
#define MMD_FLAG_JUMPINGON 0x2
#define MMD_FLAG_JUMP8TH 0x4
#define MMD_FLAG_INSTRSATT 0x8 // instruments are attached (this is a module)
#define MMD_FLAG_VOLHEX 0x10
#define MMD_FLAG_STSLIDE 0x20 // SoundTracker mode for slides
#define MMD_FLAG_8CHANNEL 0x40 // OctaMED 8 channel song
#define MMD_FLAG_SLOWHQ 0x80 // HQ slows playing speed (V2-V4 compatibility)
// flags2
#define MMD_FLAG2_BMASK 0x1F
#define MMD_FLAG2_BPM 0x20
#define MMD_FLAG2_MIX 0x80 // uses Mixing (V7+)
// flags3:
#define MMD_FLAG3_STEREO 0x1 // mixing in Stereo mode
#define MMD_FLAG3_FREEPAN 0x2 // free panning
#define MMD_FLAG3_GM 0x4 // module designed for GM/XG compatibility
// generic MMD tags
#define MMDTAG_END 0
#define MMDTAG_PTR 0x80000000 // data needs relocation
#define MMDTAG_MUSTKNOW 0x40000000 // loader must fail if this isn't recognized
#define MMDTAG_MUSTWARN 0x20000000 // loader must warn if this isn't recognized
// ExpData tags
// # of effect groups, including the global group (will
// override settings in MMDSong struct), default = 1
#define MMDTAG_EXP_NUMFXGROUPS 1
#define MMDTAG_TRK_NAME (MMDTAG_PTR|1) // trackinfo tags
#define MMDTAG_TRK_NAMELEN 2 // namelen includes zero term.
#define MMDTAG_TRK_FXGROUP 3
// effectinfo tags
#define MMDTAG_FX_ECHOTYPE 1
#define MMDTAG_FX_ECHOLEN 2
#define MMDTAG_FX_ECHODEPTH 3
#define MMDTAG_FX_STEREOSEP 4
#define MMDTAG_FX_GROUPNAME (MMDTAG_PTR|5) // the Global Effects group shouldn't have name saved!
#define MMDTAG_FX_GRPNAMELEN 6 // namelen includes zero term.
#pragma pack(1)
typedef struct tagMEDMODULEHEADER
{
DWORD id; // MMD1-MMD3
DWORD modlen; // Size of file
DWORD song; // Position in file for this song
WORD psecnum;
WORD pseq;
DWORD blockarr; // Position in file for blocks
DWORD mmdflags;
DWORD smplarr; // Position in file for samples
DWORD reserved;
DWORD expdata; // Absolute offset in file for ExpData (0 if not present)
DWORD reserved2;
WORD pstate;
WORD pblock;
WORD pline;
WORD pseqnum;
WORD actplayline;
BYTE counter;
BYTE extra_songs; // # of songs - 1
} MEDMODULEHEADER;
typedef struct tagMMD0SAMPLE
{
WORD rep, replen;
BYTE midich;
BYTE midipreset;
BYTE svol;
signed char strans;
} MMD0SAMPLE;
// Sample header is immediately followed by sample data...
typedef struct tagMMDSAMPLEHEADER
{
DWORD length; // length of *one* *unpacked* channel in *bytes*
WORD type;
// if non-negative
// bits 0-3 reserved for multi-octave instruments, not supported on the PC
// 0x10: 16 bit (otherwise 8 bit)
// 0x20: Stereo (otherwise mono)
// 0x40: Uses DeltaCode
// 0x80: Packed data
// -1: Synth
// -2: Hybrid
// if type indicates packed data, these fields follow, otherwise we go right to the data
WORD packtype; // Only 1 = ADPCM is supported
WORD subtype; // Packing subtype
// ADPCM subtype
// 1: g723_40
// 2: g721
// 3: g723_24
BYTE commonflags; // flags common to all packtypes (none defined so far)
BYTE packerflags; // flags for the specific packtype
ULONG leftchlen; // packed length of left channel in bytes
ULONG rightchlen; // packed length of right channel in bytes (ONLY PRESENT IN STEREO SAMPLES)
BYTE SampleData[1]; // Sample Data
} MMDSAMPLEHEADER;
// MMD0/MMD1 song header
typedef struct tagMMD0SONGHEADER
{
MMD0SAMPLE sample[63];
WORD numblocks; // # of blocks
WORD songlen; // # of entries used in playseq
BYTE playseq[256]; // Play sequence
WORD deftempo; // BPM tempo
signed char playtransp; // Play transpose
BYTE flags; // 0x10: Hex Volumes | 0x20: ST/NT/PT Slides | 0x40: 8 Channels song
BYTE flags2; // [b4-b0]+1: Tempo LPB, 0x20: tempo mode, 0x80: mix_conv=on
BYTE tempo2; // tempo TPL
BYTE trkvol[16]; // track volumes
BYTE mastervol; // master volume
BYTE numsamples; // # of samples (max=63)
} MMD0SONGHEADER;
// MMD2/MMD3 song header
typedef struct tagMMD2SONGHEADER
{
MMD0SAMPLE sample[63];
WORD numblocks; // # of blocks
WORD numsections; // # of sections
DWORD playseqtable; // filepos of play sequence
DWORD sectiontable; // filepos of sections table (WORD array)
DWORD trackvols; // filepos of tracks volume (BYTE array)
WORD numtracks; // # of tracks (max 64)
WORD numpseqs; // # of play sequences
DWORD trackpans; // filepos of tracks pan values (BYTE array)
LONG flags3; // 0x1:stereo_mix, 0x2:free_panning, 0x4:GM/XG compatibility
WORD voladj; // vol_adjust (set to 100 if 0)
WORD channels; // # of channels (4 if =0)
BYTE mix_echotype; // 1:normal,2:xecho
BYTE mix_echodepth; // 1..6
WORD mix_echolen; // > 0
signed char mix_stereosep; // -4..4
BYTE pad0[223];
WORD deftempo; // BPM tempo
signed char playtransp; // play transpose
BYTE flags; // 0x1:filteron, 0x2:jumpingon, 0x4:jump8th, 0x8:instr_attached, 0x10:hex_vol, 0x20:PT_slides, 0x40:8ch_conv,0x80:hq slows playing speed
BYTE flags2; // 0x80:mix_conv=on, [b4-b0]+1:tempo LPB, 0x20:tempo_mode
BYTE tempo2; // tempo TPL
BYTE pad1[16];
BYTE mastervol; // master volume
BYTE numsamples; // # of samples (max 63)
} MMD2SONGHEADER;
// For MMD0 the note information is held in 3 bytes, byte0, byte1, byte2. For reference we
// number the bits in each byte 0..7, where 0 is the low bit.
// The note is held as bits 5..0 of byte0
// The instrument is encoded in 6 bits, bits 7 and 6 of byte0 and bits 7,6,5,4 of byte1
// The command number is bits 3,2,1,0 of byte1, command data is in byte2:
// For command 0, byte2 represents the second data byte, otherwise byte2
// represents the first data byte.
typedef struct tagMMD0BLOCK
{
BYTE numtracks;
BYTE lines; // File value is 1 less than actual, so 0 -> 1 line
} MMD0BLOCK; // BYTE data[lines+1][tracks][3];
// For MMD1,MMD2,MMD3 the note information is carried in 4 bytes, byte0, byte1,
// byte2 and byte3
// The note is held as byte0 (values above 0x84 are ignored)
// The instrument is held as byte1
// The command number is held as byte2, command data is in byte3
// For commands 0 and 0x19 byte3 represents the second data byte,
// otherwise byte2 represents the first data byte.
typedef struct tagMMD1BLOCK
{
WORD numtracks; // Number of tracks, may be > 64, but then that data is skipped.
WORD lines; // Stored value is 1 less than actual, so 0 -> 1 line
DWORD info; // Offset of BlockInfo (if 0, no block_info is present)
} MMD1BLOCK;
typedef struct tagMMD1BLOCKINFO
{
DWORD hlmask; // Unimplemented - ignore
DWORD blockname; // file offset of block name
DWORD blocknamelen; // length of block name (including term. 0)
DWORD pagetable; // file offset of command page table
DWORD cmdexttable; // file offset of command extension table
DWORD reserved[4]; // future expansion
} MMD1BLOCKINFO;
// A set of play sequences is stored as an array of ULONG files offsets
// Each offset points to the play sequence itself.
typedef struct tagMMD2PLAYSEQ
{
CHAR name[32];
DWORD command_offs; // filepos of command table
DWORD reserved;
WORD length;
WORD seq[512]; // skip if > 0x8000
} MMD2PLAYSEQ;
// A command table contains commands that effect a particular play sequence
// entry. The only commands read in are STOP or POSJUMP, all others are ignored
// POSJUMP is presumed to have extra bytes containing a WORD for the position
typedef struct tagMMDCOMMAND
{
WORD offset; // Offset within current sequence entry
BYTE cmdnumber; // STOP (537) or POSJUMP (538) (others skipped)
BYTE extra_count;
BYTE extra_bytes[4];// [extra_count];
} MMDCOMMAND; // Last entry has offset == 0xFFFF, cmd_number == 0 and 0 extrabytes
typedef struct tagMMD0EXP
{
DWORD nextmod; // File offset of next Hdr
DWORD exp_smp; // Pointer to extra instrument data
WORD s_ext_entries; // Number of extra instrument entries
WORD s_ext_entrsz; // Size of extra instrument data
DWORD annotxt;
DWORD annolen;
DWORD iinfo; // Instrument names
WORD i_ext_entries;
WORD i_ext_entrsz;
DWORD jumpmask;
DWORD rgbtable;
BYTE channelsplit[4]; // Only used if 8ch_conv (extra channel for every nonzero entry)
DWORD n_info;
DWORD songname; // Song name
DWORD songnamelen;
DWORD dumps;
DWORD mmdinfo;
DWORD mmdrexx;
DWORD mmdcmd3x;
DWORD trackinfo_ofs; // ptr to song->numtracks ptrs to tag lists
DWORD effectinfo_ofs; // ptr to group ptrs
DWORD tag_end;
} MMD0EXP;
#pragma pack()
static void MedConvert(MODCOMMAND *p, const MMD0SONGHEADER *pmsh)
//---------------------------------------------------------------
{
const BYTE bpmvals[9] = { 179,164,152,141,131,123,116,110,104};
UINT command = p->command;
UINT param = p->param;
switch(command)
{
case 0x00: if (param) command = CMD_ARPEGGIO; else command = 0; break;
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_TONEPORTAVOL; break;
case 0x06: command = CMD_VIBRATOVOL; break;
case 0x07: command = CMD_TREMOLO; break;
case 0x0A: if (param & 0xF0) param &= 0xF0; command = CMD_VOLUMESLIDE; if (!param) command = 0; break;
case 0x0B: command = CMD_POSITIONJUMP; break;
case 0x0C: command = CMD_VOLUME;
if (pmsh->flags & MMD_FLAG_VOLHEX)
{
if (param < 0x80)
{
param = (param+1) / 2;
} else command = 0;
} else
{
if (param <= 0x99)
{
param = (param >> 4)*10+((param & 0x0F) % 10);
if (param > 64) param = 64;
} else command = 0;
}
break;
case 0x09: command = (param < 0x20) ? CMD_SPEED : CMD_TEMPO; break;
case 0x0D: if (param & 0xF0) param &= 0xF0; command = CMD_VOLUMESLIDE; if (!param) command = 0; break;
case 0x0F: // Set Tempo / Special
// F.00 = Pattern Break
if (!param) command = CMD_PATTERNBREAK; else
// F.01 - F.F0: Set tempo/speed
if (param <= 0xF0)
{
if (pmsh->flags & MMD_FLAG_8CHANNEL)
{
param = (param > 10) ? 99 : bpmvals[param-1];
} else
// F.01 - F.0A: Set Speed
if (param <= 0x0A)
{
command = CMD_SPEED;
} else
// Old tempo
if (!(pmsh->flags2 & MMD_FLAG2_BPM))
{
param = _muldiv(param, 5*715909, 2*474326);
}
// F.0B - F.F0: Set Tempo (assumes LPB=4)
if (param > 0x0A)
{
command = CMD_TEMPO;
if (param < 0x21) param = 0x21;
if (param > 240) param = 240;
}
} else
switch(param)
{
// F.F1: Retrig 2x
case 0xF1:
command = CMD_MODCMDEX;
param = 0x93;
break;
// F.F2: Note Delay 2x
case 0xF2:
command = CMD_MODCMDEX;
param = 0xD3;
break;
// F.F3: Retrig 3x
case 0xF3:
command = CMD_MODCMDEX;
param = 0x92;
break;
// F.F4: Note Delay 1/3
case 0xF4:
command = CMD_MODCMDEX;
param = 0xD2;
break;
// F.F5: Note Delay 2/3
case 0xF5:
command = CMD_MODCMDEX;
param = 0xD4;
break;
// F.F8: Filter Off
case 0xF8:
command = CMD_MODCMDEX;
param = 0x00;
break;
// F.F9: Filter On
case 0xF9:
command = CMD_MODCMDEX;
param = 0x01;
break;
// F.FD: Very fast tone-portamento
case 0xFD:
command = CMD_TONEPORTAMENTO;
param = 0xFF;
break;
// F.FE: End Song
case 0xFE:
command = CMD_SPEED;
param = 0;
break;
// F.FF: Note Cut
case 0xFF:
command = CMD_MODCMDEX;
param = 0xC0;
break;
default:
#ifdef MED_LOG
Log("Unknown Fxx command: cmd=0x%02X param=0x%02X\n", command, param);
#endif
param = command = 0;
}
break;
// 11.0x: Fine Slide Up
case 0x11:
command = CMD_MODCMDEX;
if (param > 0x0F) param = 0x0F;
param |= 0x10;
break;
// 12.0x: Fine Slide Down
case 0x12:
command = CMD_MODCMDEX;
if (param > 0x0F) param = 0x0F;
param |= 0x20;
break;
// 14.xx: Vibrato
case 0x14:
command = CMD_VIBRATO;
break;
// 15.xx: FineTune
case 0x15:
command = CMD_MODCMDEX;
param &= 0x0F;
param |= 0x50;
break;
// 16.xx: Pattern Loop
case 0x16:
command = CMD_MODCMDEX;
if (param > 0x0F) param = 0x0F;
param |= 0x60;
break;
// 18.xx: Note Cut
case 0x18:
command = CMD_MODCMDEX;
if (param > 0x0F) param = 0x0F;
param |= 0xC0;
break;
// 19.xx: Sample Offset
case 0x19:
command = CMD_OFFSET;
break;
// 1A.0x: Fine Volume Up
case 0x1A:
command = CMD_MODCMDEX;
if (param > 0x0F) param = 0x0F;
param |= 0xA0;
break;
// 1B.0x: Fine Volume Down
case 0x1B:
command = CMD_MODCMDEX;
if (param > 0x0F) param = 0x0F;
param |= 0xB0;
break;
// 1D.xx: Pattern Break
case 0x1D:
command = CMD_PATTERNBREAK;
break;
// 1E.0x: Pattern Delay
case 0x1E:
command = CMD_MODCMDEX;
if (param > 0x0F) param = 0x0F;
param |= 0xE0;
break;
// 1F.xy: Retrig
case 0x1F:
command = CMD_RETRIG;
param &= 0x0F;
break;
// 2E.xx: set panning
case 0x2E:
command = CMD_MODCMDEX;
param = ((param + 0x10) & 0xFF) >> 1;
if (param > 0x0F) param = 0x0F;
param |= 0x80;
break;
default:
#ifdef MED_LOG
// 0x2E ?
Log("Unknown command: cmd=0x%02X param=0x%02X\n", command, param);
#endif
command = param = 0;
}
p->command = command;
p->param = param;
}
BOOL CSoundFile::ReadMed(const BYTE *lpStream, DWORD dwMemLength)
//---------------------------------------------------------------
{
const MEDMODULEHEADER *pmmh;
const MMD0SONGHEADER *pmsh;
const MMD2SONGHEADER *pmsh2;
const MMD0EXP *pmex;
DWORD dwBlockArr, dwSmplArr, dwExpData, wNumBlocks;
LPDWORD pdwTable;
CHAR version;
UINT deftempo;
int playtransp = 0;
if ((!lpStream) || (dwMemLength < 0x200)) return FALSE;
pmmh = (MEDMODULEHEADER *)lpStream;
if (((pmmh->id & 0x00FFFFFF) != 0x444D4D) || (!pmmh->song)) return FALSE;
// Check for 'MMDx'
DWORD dwSong = bswapBE32(pmmh->song);
if ((dwSong >= dwMemLength) || (dwSong + sizeof(MMD0SONGHEADER) >= dwMemLength)) return FALSE;
version = (signed char)((pmmh->id >> 24) & 0xFF);
if ((version < '0') || (version > '3')) return FALSE;
#ifdef MED_LOG
Log("\nLoading MMD%c module (flags=0x%02X)...\n", version, bswapBE32(pmmh->mmdflags));
Log(" modlen = %d\n", bswapBE32(pmmh->modlen));
Log(" song = 0x%08X\n", bswapBE32(pmmh->song));
Log(" psecnum = %d\n", bswapBE16(pmmh->psecnum));
Log(" pseq = %d\n", bswapBE16(pmmh->pseq));
Log(" blockarr = 0x%08X\n", bswapBE32(pmmh->blockarr));
Log(" mmdflags = 0x%08X\n", bswapBE32(pmmh->mmdflags));
Log(" smplarr = 0x%08X\n", bswapBE32(pmmh->smplarr));
Log(" reserved = 0x%08X\n", bswapBE32(pmmh->reserved));
Log(" expdata = 0x%08X\n", bswapBE32(pmmh->expdata));
Log(" reserved2= 0x%08X\n", bswapBE32(pmmh->reserved2));
Log(" pstate = %d\n", bswapBE16(pmmh->pstate));
Log(" pblock = %d\n", bswapBE16(pmmh->pblock));
Log(" pline = %d\n", bswapBE16(pmmh->pline));
Log(" pseqnum = %d\n", bswapBE16(pmmh->pseqnum));
Log(" actplayline=%d\n", bswapBE16(pmmh->actplayline));
Log(" counter = %d\n", pmmh->counter);
Log(" extra_songs = %d\n", pmmh->extra_songs);
Log("\n");
#endif
m_nType = MOD_TYPE_MED;
m_nSongPreAmp = 0x20;
dwBlockArr = bswapBE32(pmmh->blockarr);
dwSmplArr = bswapBE32(pmmh->smplarr);
dwExpData = bswapBE32(pmmh->expdata);
if ((dwExpData) && (dwExpData+sizeof(MMD0EXP) < dwMemLength))
pmex = (MMD0EXP *)(lpStream+dwExpData);
else
pmex = NULL;
pmsh = (MMD0SONGHEADER *)(lpStream + dwSong);
pmsh2 = (MMD2SONGHEADER *)pmsh;
#ifdef MED_LOG
if (version < '2')
{
Log("MMD0 Header:\n");
Log(" numblocks = %d\n", bswapBE16(pmsh->numblocks));
Log(" songlen = %d\n", bswapBE16(pmsh->songlen));
Log(" playseq = ");
for (UINT idbg1=0; idbg1<16; idbg1++) Log("%2d, ", pmsh->playseq[idbg1]);
Log("...\n");
Log(" deftempo = 0x%04X\n", bswapBE16(pmsh->deftempo));
Log(" playtransp = %d\n", (signed char)pmsh->playtransp);
Log(" flags(1,2) = 0x%02X, 0x%02X\n", pmsh->flags, pmsh->flags2);
Log(" tempo2 = %d\n", pmsh->tempo2);
Log(" trkvol = ");
for (UINT idbg2=0; idbg2<16; idbg2++) Log("0x%02X, ", pmsh->trkvol[idbg2]);
Log("...\n");
Log(" mastervol = 0x%02X\n", pmsh->mastervol);
Log(" numsamples = %d\n", pmsh->numsamples);
} else
{
Log("MMD2 Header:\n");
Log(" numblocks = %d\n", bswapBE16(pmsh2->numblocks));
Log(" numsections= %d\n", bswapBE16(pmsh2->numsections));
Log(" playseqptr = 0x%04X\n", bswapBE32(pmsh2->playseqtable));
Log(" sectionptr = 0x%04X\n", bswapBE32(pmsh2->sectiontable));
Log(" trackvols = 0x%04X\n", bswapBE32(pmsh2->trackvols));
Log(" numtracks = %d\n", bswapBE16(pmsh2->numtracks));
Log(" numpseqs = %d\n", bswapBE16(pmsh2->numpseqs));
Log(" trackpans = 0x%04X\n", bswapBE32(pmsh2->trackpans));
Log(" flags3 = 0x%08X\n", bswapBE32(pmsh2->flags3));
Log(" voladj = %d\n", bswapBE16(pmsh2->voladj));
Log(" channels = %d\n", bswapBE16(pmsh2->channels));
Log(" echotype = %d\n", pmsh2->mix_echotype);
Log(" echodepth = %d\n", pmsh2->mix_echodepth);
Log(" echolen = %d\n", bswapBE16(pmsh2->mix_echolen));
Log(" stereosep = %d\n", (signed char)pmsh2->mix_stereosep);
Log(" deftempo = 0x%04X\n", bswapBE16(pmsh2->deftempo));
Log(" playtransp = %d\n", (signed char)pmsh2->playtransp);
Log(" flags(1,2) = 0x%02X, 0x%02X\n", pmsh2->flags, pmsh2->flags2);
Log(" tempo2 = %d\n", pmsh2->tempo2);
Log(" mastervol = 0x%02X\n", pmsh2->mastervol);
Log(" numsamples = %d\n", pmsh->numsamples);
}
Log("\n");
#endif
wNumBlocks = bswapBE16(pmsh->numblocks);
m_nChannels = 4;
m_nSamples = pmsh->numsamples;
if (m_nSamples > 63) m_nSamples = 63;
// Tempo
m_nDefaultTempo = 125;
deftempo = bswapBE16(pmsh->deftempo);
if (!deftempo) deftempo = 125;
if (pmsh->flags2 & MMD_FLAG2_BPM)
{
UINT tempo_tpl = (pmsh->flags2 & MMD_FLAG2_BMASK) + 1;
if (!tempo_tpl) tempo_tpl = 4;
deftempo *= tempo_tpl;
deftempo /= 4;
#ifdef MED_LOG
Log("newtempo: %3d bpm (bpm=%3d lpb=%2d)\n", deftempo, bswapBE16(pmsh->deftempo), (pmsh->flags2 & MMD_FLAG2_BMASK)+1);
#endif
} else
{
deftempo = _muldiv(deftempo, 5*715909, 2*474326);
#ifdef MED_LOG
Log("oldtempo: %3d bpm (bpm=%3d)\n", deftempo, bswapBE16(pmsh->deftempo));
#endif
}
// Speed
m_nDefaultSpeed = pmsh->tempo2;
if (!m_nDefaultSpeed) m_nDefaultSpeed = 6;
if (deftempo < 0x21) deftempo = 0x21;
if (deftempo > 255)
{
while ((m_nDefaultSpeed > 3) && (deftempo > 260))
{
deftempo = (deftempo * (m_nDefaultSpeed - 1)) / m_nDefaultSpeed;
m_nDefaultSpeed--;
}
if (deftempo > 255) deftempo = 255;
}
m_nDefaultTempo = deftempo;
// Reading Samples
for (UINT iSHdr=0; iSHdr<m_nSamples; iSHdr++)
{
MODINSTRUMENT *pins = &Ins[iSHdr+1];
pins->nLoopStart = bswapBE16(pmsh->sample[iSHdr].rep) << 1;
pins->nLoopEnd = pins->nLoopStart + (bswapBE16(pmsh->sample[iSHdr].replen) << 1);
pins->nVolume = (pmsh->sample[iSHdr].svol << 2);
pins->nGlobalVol = 64;
if (pins->nVolume > 256) pins->nVolume = 256;
pins->RelativeTone = -12 * pmsh->sample[iSHdr].strans;
pins->nPan = 128;
if (pins->nLoopEnd) pins->uFlags |= CHN_LOOP;
}
// Common Flags
if (!(pmsh->flags & 0x20)) m_dwSongFlags |= SONG_FASTVOLSLIDES;
// Reading play sequence
if (version < '2')
{
UINT nbo = pmsh->songlen >> 8;
if (nbo >= MAX_ORDERS) nbo = MAX_ORDERS-1;
if (!nbo) nbo = 1;
memcpy(Order, pmsh->playseq, nbo);
playtransp = pmsh->playtransp;
} else
{
UINT nOrders, nSections;
UINT nTrks = bswapBE16(pmsh2->numtracks);
if ((nTrks >= 4) && (nTrks <= 32)) m_nChannels = nTrks;
DWORD playseqtable = bswapBE32(pmsh2->playseqtable);
UINT numplayseqs = bswapBE16(pmsh2->numpseqs);
if (!numplayseqs) numplayseqs = 1;
nOrders = 0;
nSections = bswapBE16(pmsh2->numsections);
DWORD sectiontable = bswapBE32(pmsh2->sectiontable);
if ((!nSections) || (!sectiontable) || (sectiontable >= dwMemLength-2)) nSections = 1;
nOrders = 0;
for (UINT iSection=0; iSection<nSections; iSection++)
{
UINT nplayseq = 0;
if ((sectiontable) && (sectiontable < dwMemLength-2))
{
nplayseq = lpStream[sectiontable+1];
sectiontable += 2; // WORDs
} else
{
nSections = 0;
}
UINT pseq = 0;
if ((playseqtable) && (playseqtable + nplayseq*4 < dwMemLength))
{
pseq = bswapBE32(((LPDWORD)(lpStream+playseqtable))[nplayseq]);
}
if ((pseq) && (pseq < dwMemLength - sizeof(MMD2PLAYSEQ)))
{
MMD2PLAYSEQ *pmps = (MMD2PLAYSEQ *)(lpStream + pseq);
if (!m_szNames[0][0]) memcpy(m_szNames[0], pmps->name, 31);
UINT n = bswapBE16(pmps->length);
if (pseq+n <= dwMemLength)
{
for (UINT i=0; i<n; i++)
{
UINT seqval = pmps->seq[i] >> 8;
if ((seqval < wNumBlocks) && (nOrders < MAX_ORDERS-1))
{
Order[nOrders++] = seqval;
}
}
}
}
}
playtransp = pmsh2->playtransp;
while (nOrders < MAX_ORDERS) Order[nOrders++] = 0xFF;
}
// Reading Expansion structure
if (pmex)
{
// Channel Split
if ((m_nChannels == 4) && (pmsh->flags & 0x40))
{
for (UINT i8ch=0; i8ch<4; i8ch++)
{
if (pmex->channelsplit[i8ch]) m_nChannels++;
}
}
// Song Comments
UINT annotxt = bswapBE32(pmex->annotxt);
UINT annolen = bswapBE32(pmex->annolen);
if ((annotxt) && (annolen) && (annotxt+annolen <= dwMemLength))
{
m_lpszSongComments = new char[annolen+1];
memcpy(m_lpszSongComments, lpStream+annotxt, annolen);
m_lpszSongComments[annolen] = 0;
}
// Song Name
UINT songname = bswapBE32(pmex->songname);
UINT songnamelen = bswapBE32(pmex->songnamelen);
if ((songname) && (songnamelen) && (songname+songnamelen <= dwMemLength))
{
if (songnamelen > 31) songnamelen = 31;
memcpy(m_szNames[0], lpStream+songname, songnamelen);
}
// Sample Names
DWORD smpinfoex = bswapBE32(pmex->iinfo);
if (smpinfoex)
{
DWORD iinfoptr = bswapBE32(pmex->iinfo);
UINT ientries = bswapBE16(pmex->i_ext_entries);
UINT ientrysz = bswapBE16(pmex->i_ext_entrsz);
if ((iinfoptr) && (ientrysz < 256) && (iinfoptr + ientries*ientrysz < dwMemLength))
{
LPCSTR psznames = (LPCSTR)(lpStream + iinfoptr);
UINT maxnamelen = ientrysz;
if (maxnamelen > 32) maxnamelen = 32;
for (UINT i=0; i<ientries; i++) if (i < m_nSamples)
{
lstrcpyn(m_szNames[i+1], psznames + i*ientrysz, maxnamelen);
}
}
}
// Track Names
DWORD trackinfo_ofs = bswapBE32(pmex->trackinfo_ofs);
if ((trackinfo_ofs) && (trackinfo_ofs + m_nChannels * 4 < dwMemLength))
{
DWORD *ptrktags = (DWORD *)(lpStream + trackinfo_ofs);
for (UINT i=0; i<m_nChannels; i++)
{
DWORD trknameofs = 0, trknamelen = 0;
DWORD trktagofs = bswapBE32(ptrktags[i]);
if (trktagofs)
{
while (trktagofs+8 < dwMemLength)
{
DWORD ntag = bswapBE32(*(DWORD *)(lpStream + trktagofs));
if (ntag == MMDTAG_END) break;
DWORD tagdata = bswapBE32(*(DWORD *)(lpStream + trktagofs + 4));
switch(ntag)
{
case MMDTAG_TRK_NAMELEN: trknamelen = tagdata; break;
case MMDTAG_TRK_NAME: trknameofs = tagdata; break;
}
trktagofs += 8;
}
if (trknamelen > MAX_CHANNELNAME) trknamelen = MAX_CHANNELNAME;
if ((trknameofs) && (trknameofs + trknamelen < dwMemLength))
{
lstrcpyn(ChnSettings[i].szName, (LPCSTR)(lpStream+trknameofs), MAX_CHANNELNAME);
}
}
}
}
}
// Reading samples
if (dwSmplArr > dwMemLength - 4*m_nSamples) return TRUE;
pdwTable = (LPDWORD)(lpStream + dwSmplArr);
for (UINT iSmp=0; iSmp<m_nSamples; iSmp++) if (pdwTable[iSmp])
{
UINT dwPos = bswapBE32(pdwTable[iSmp]);
if ((dwPos >= dwMemLength) || (dwPos + sizeof(MMDSAMPLEHEADER) >= dwMemLength)) continue;
MMDSAMPLEHEADER *psdh = (MMDSAMPLEHEADER *)(lpStream + dwPos);
UINT len = bswapBE32(psdh->length);
#ifdef MED_LOG
Log("SampleData %d: stype=0x%02X len=%d\n", iSmp, bswapBE16(psdh->type), len);
#endif
if ((len > MAX_SAMPLE_LENGTH) || (dwPos + len + 6 > dwMemLength)) len = 0;
UINT flags = RS_PCM8S, stype = bswapBE16(psdh->type);
LPSTR psdata = (LPSTR)(lpStream + dwPos + 6);
if (stype & 0x80)
{
psdata += (stype & 0x20) ? 14 : 6;
} else
{
if (stype & 0x10)
{
Ins[iSmp+1].uFlags |= CHN_16BIT;
len /= 2;
flags = (stype & 0x20) ? RS_STPCM16M : RS_PCM16M;
} else
{
flags = (stype & 0x20) ? RS_STPCM8S : RS_PCM8S;
}
if (stype & 0x20) len /= 2;
}
Ins[iSmp+1].nLength = len;
ReadSample(&Ins[iSmp+1], flags, psdata, dwMemLength - dwPos - 6);
}
// Reading patterns (blocks)
if (wNumBlocks > MAX_PATTERNS) wNumBlocks = MAX_PATTERNS;
if ((!dwBlockArr) || (dwBlockArr > dwMemLength - 4*wNumBlocks)) return TRUE;
pdwTable = (LPDWORD)(lpStream + dwBlockArr);
playtransp += (version == '3') ? 24 : 48;
for (UINT iBlk=0; iBlk<wNumBlocks; iBlk++)
{
UINT dwPos = bswapBE32(pdwTable[iBlk]);
if ((!dwPos) || (dwPos >= dwMemLength) || (dwPos >= dwMemLength - 8)) continue;
UINT lines = 64, tracks = 4;
if (version == '0')
{
const MMD0BLOCK *pmb = (const MMD0BLOCK *)(lpStream + dwPos);
lines = pmb->lines + 1;
tracks = pmb->numtracks;
if (!tracks) tracks = m_nChannels;
if ((Patterns[iBlk] = AllocatePattern(lines, m_nChannels)) == NULL) continue;
PatternSize[iBlk] = lines;
MODCOMMAND *p = Patterns[iBlk];
LPBYTE s = (LPBYTE)(lpStream + dwPos + 2);
UINT maxlen = tracks*lines*3;
if (maxlen + dwPos > dwMemLength - 2) break;
for (UINT y=0; y<lines; y++)
{
for (UINT x=0; x<tracks; x++, s+=3) if (x < m_nChannels)
{
BYTE note = s[0] & 0x3F;
BYTE instr = s[1] >> 4;
if (s[0] & 0x80) instr |= 0x10;
if (s[0] & 0x40) instr |= 0x20;
if ((note) && (note <= 132)) p->note = note + playtransp;
p->instr = instr;
p->command = s[1] & 0x0F;
p->param = s[2];
// if (!iBlk) Log("%02X.%02X.%02X | ", s[0], s[1], s[2]);
MedConvert(p, pmsh);
p++;
}
//if (!iBlk) Log("\n");
}
} else
{
MMD1BLOCK *pmb = (MMD1BLOCK *)(lpStream + dwPos);
#ifdef MED_LOG
Log("MMD1BLOCK: lines=%2d, tracks=%2d, offset=0x%04X\n",
bswapBE16(pmb->lines), bswapBE16(pmb->numtracks), bswapBE32(pmb->info));
#endif
MMD1BLOCKINFO *pbi = NULL;
BYTE *pcmdext = NULL;
lines = (pmb->lines >> 8) + 1;
tracks = pmb->numtracks >> 8;
if (!tracks) tracks = m_nChannels;
if ((Patterns[iBlk] = AllocatePattern(lines, m_nChannels)) == NULL) continue;
PatternSize[iBlk] = (WORD)lines;
DWORD dwBlockInfo = bswapBE32(pmb->info);
if ((dwBlockInfo) && (dwBlockInfo < dwMemLength - sizeof(MMD1BLOCKINFO)))
{
pbi = (MMD1BLOCKINFO *)(lpStream + dwBlockInfo);
#ifdef MED_LOG
Log(" BLOCKINFO: blockname=0x%04X namelen=%d pagetable=0x%04X &cmdexttable=0x%04X\n",
bswapBE32(pbi->blockname), bswapBE32(pbi->blocknamelen), bswapBE32(pbi->pagetable), bswapBE32(pbi->cmdexttable));
#endif
if ((pbi->blockname) && (pbi->blocknamelen))
{
DWORD nameofs = bswapBE32(pbi->blockname);
UINT namelen = bswapBE32(pbi->blocknamelen);
if ((nameofs < dwMemLength) && (nameofs+namelen < dwMemLength))
{
SetPatternName(iBlk, (LPCSTR)(lpStream+nameofs));
}
}
if (pbi->cmdexttable)
{
DWORD cmdexttable = bswapBE32(pbi->cmdexttable);
if (cmdexttable < dwMemLength - 4)
{
cmdexttable = bswapBE32(*(DWORD *)(lpStream + cmdexttable));
if ((cmdexttable) && (cmdexttable <= dwMemLength - lines*tracks))
{
pcmdext = (BYTE *)(lpStream + cmdexttable);
}
}
}
}
MODCOMMAND *p = Patterns[iBlk];
LPBYTE s = (LPBYTE)(lpStream + dwPos + 8);
UINT maxlen = tracks*lines*4;
if (maxlen + dwPos > dwMemLength - 8) break;
for (UINT y=0; y<lines; y++)
{
for (UINT x=0; x<tracks; x++, s+=4) if (x < m_nChannels)
{
BYTE note = s[0];
if ((note) && (note <= 132))
{
int rnote = note + playtransp;
if (rnote < 1) rnote = 1;
if (rnote > 120) rnote = 120;
p->note = (BYTE)rnote;
}
p->instr = s[1];
p->command = s[2];
p->param = s[3];
if (pcmdext) p->vol = pcmdext[x];
MedConvert(p, pmsh);
p++;
}
if (pcmdext) pcmdext += tracks;
}
}
}
// Setup channel pan positions
for (UINT iCh=0; iCh<m_nChannels; iCh++)
{
ChnSettings[iCh].nPan = (((iCh&3) == 1) || ((iCh&3) == 2)) ? 0xC0 : 0x40;
ChnSettings[iCh].nVolume = 64;
}
return TRUE;
}
Reference in a new issue Copy permalink