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sndfile.cpp
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sndfile.cpp
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/*
* This source code is public domain.
*
* Authors: Olivier Lapicque <[email protected]>,
* Adam Goode <[email protected]> (endian and char fixes for PPC)
*/
#include <math.h> //for GCCFIX
#include <libmodplug/stdafx.h>
#include <libmodplug/sndfile.h>
#define MMCMP_SUPPORT
#ifdef MMCMP_SUPPORT
extern BOOL MMCMP_Unpack(LPCBYTE *ppMemFile, LPDWORD pdwMemLength);
#endif
// External decompressors
extern void AMSUnpack(const char *psrc, UINT inputlen, char *pdest, UINT dmax, char packcharacter);
extern WORD MDLReadBits(DWORD &bitbuf, UINT &bitnum, LPBYTE &ibuf, CHAR n);
extern int DMFUnpack(LPBYTE psample, LPBYTE ibuf, LPBYTE ibufmax, UINT maxlen);
extern DWORD ITReadBits(DWORD &bitbuf, UINT &bitnum, LPBYTE &ibuf, CHAR n);
extern void ITUnpack8Bit(signed char *pSample, DWORD dwLen, LPBYTE lpMemFile, DWORD dwMemLength, BOOL b215);
extern void ITUnpack16Bit(signed char *pSample, DWORD dwLen, LPBYTE lpMemFile, DWORD dwMemLength, BOOL b215);
#define MAX_PACK_TABLES 3
// Compression table
static const signed char UnpackTable[MAX_PACK_TABLES][16] =
//--------------------------------------------
{
// CPU-generated dynamic table
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
// u-Law table
{0, 1, 2, 4, 8, 16, 32, 64,
-1, -2, -4, -8, -16, -32, -48, -64},
// Linear table
{0, 1, 2, 3, 5, 7, 12, 19,
-1, -2, -3, -5, -7, -12, -19, -31}
};
//////////////////////////////////////////////////////////
// CSoundFile
CSoundFile::CSoundFile()
//----------------------
{
m_nType = MOD_TYPE_NONE;
m_dwSongFlags = 0;
m_nChannels = 0;
m_nMixChannels = 0;
m_nSamples = 0;
m_nInstruments = 0;
m_nPatternNames = 0;
m_lpszPatternNames = NULL;
m_lpszSongComments = NULL;
m_nFreqFactor = m_nTempoFactor = 128;
m_nMasterVolume = 128;
m_nMinPeriod = 0x20;
m_nMaxPeriod = 0x7FFF;
m_nRepeatCount = 0;
memset(Chn, 0, sizeof(Chn));
memset(ChnMix, 0, sizeof(ChnMix));
memset(Ins, 0, sizeof(Ins));
memset(ChnSettings, 0, sizeof(ChnSettings));
memset(Headers, 0, sizeof(Headers));
memset(Order, 0xFF, sizeof(Order));
memset(Patterns, 0, sizeof(Patterns));
memset(m_szNames, 0, sizeof(m_szNames));
memset(m_MixPlugins, 0, sizeof(m_MixPlugins));
}
CSoundFile::~CSoundFile()
//-----------------------
{
Destroy();
}
BOOL CSoundFile::Create(LPCBYTE lpStream, DWORD dwMemLength)
//----------------------------------------------------------
{
int i;
m_nType = MOD_TYPE_NONE;
m_dwSongFlags = 0;
m_nChannels = 0;
m_nMixChannels = 0;
m_nSamples = 0;
m_nInstruments = 0;
m_nFreqFactor = m_nTempoFactor = 128;
m_nMasterVolume = 128;
m_nDefaultGlobalVolume = 256;
m_nGlobalVolume = 256;
m_nOldGlbVolSlide = 0;
m_nDefaultSpeed = 6;
m_nDefaultTempo = 125;
m_nPatternDelay = 0;
m_nFrameDelay = 0;
m_nNextRow = 0;
m_nRow = 0;
m_nPattern = 0;
m_nCurrentPattern = 0;
m_nNextPattern = 0;
m_nRestartPos = 0;
m_nMinPeriod = 16;
m_nMaxPeriod = 32767;
m_nSongPreAmp = 0x30;
m_nPatternNames = 0;
m_nMaxOrderPosition = 0;
m_lpszPatternNames = NULL;
m_lpszSongComments = NULL;
memset(Ins, 0, sizeof(Ins));
memset(ChnMix, 0, sizeof(ChnMix));
memset(Chn, 0, sizeof(Chn));
memset(Headers, 0, sizeof(Headers));
memset(Order, 0xFF, sizeof(Order));
memset(Patterns, 0, sizeof(Patterns));
memset(m_szNames, 0, sizeof(m_szNames));
memset(m_MixPlugins, 0, sizeof(m_MixPlugins));
ResetMidiCfg();
for (UINT npt=0; npt<MAX_PATTERNS; npt++) PatternSize[npt] = 64;
for (UINT nch=0; nch<MAX_BASECHANNELS; nch++)
{
ChnSettings[nch].nPan = 128;
ChnSettings[nch].nVolume = 64;
ChnSettings[nch].dwFlags = 0;
ChnSettings[nch].szName[0] = 0;
}
if (lpStream)
{
#ifdef MMCMP_SUPPORT
BOOL bMMCmp = MMCMP_Unpack(&lpStream, &dwMemLength);
#endif
if ((!ReadXM(lpStream, dwMemLength))
&& (!ReadS3M(lpStream, dwMemLength))
&& (!ReadIT(lpStream, dwMemLength))
&& (!ReadWav(lpStream, dwMemLength))
#ifndef MODPLUG_BASIC_SUPPORT
/* Sequencer File Format Support */
&& (!ReadABC(lpStream, dwMemLength))
&& (!ReadMID(lpStream, dwMemLength))
&& (!ReadPAT(lpStream, dwMemLength))
&& (!ReadSTM(lpStream, dwMemLength))
&& (!ReadMed(lpStream, dwMemLength))
&& (!ReadMTM(lpStream, dwMemLength))
&& (!ReadMDL(lpStream, dwMemLength))
&& (!ReadDBM(lpStream, dwMemLength))
&& (!Read669(lpStream, dwMemLength))
&& (!ReadFAR(lpStream, dwMemLength))
&& (!ReadAMS(lpStream, dwMemLength))
&& (!ReadOKT(lpStream, dwMemLength))
&& (!ReadPTM(lpStream, dwMemLength))
&& (!ReadUlt(lpStream, dwMemLength))
&& (!ReadDMF(lpStream, dwMemLength))
&& (!ReadDSM(lpStream, dwMemLength))
&& (!ReadUMX(lpStream, dwMemLength))
&& (!ReadAMF(lpStream, dwMemLength))
&& (!ReadPSM(lpStream, dwMemLength))
&& (!ReadMT2(lpStream, dwMemLength))
#endif // MODPLUG_BASIC_SUPPORT
&& (!ReadMod(lpStream, dwMemLength))) m_nType = MOD_TYPE_NONE;
#ifdef MMCMP_SUPPORT
if (bMMCmp)
{
GlobalFreePtr(lpStream);
lpStream = NULL;
}
#endif
}
// Adjust song names
for (i=0; i<MAX_SAMPLES; i++)
{
LPSTR p = m_szNames[i];
int j = 31;
p[j] = 0;
while ((j>=0) && (p[j]<=' ')) p[j--] = 0;
while (j>=0)
{
if (((BYTE)p[j]) < ' ') p[j] = ' ';
j--;
}
}
// Adjust channels
for (i=0; i<MAX_BASECHANNELS; i++)
{
if (ChnSettings[i].nVolume > 64) ChnSettings[i].nVolume = 64;
if (ChnSettings[i].nPan > 256) ChnSettings[i].nPan = 128;
Chn[i].nPan = ChnSettings[i].nPan;
Chn[i].nGlobalVol = ChnSettings[i].nVolume;
Chn[i].dwFlags = ChnSettings[i].dwFlags;
Chn[i].nVolume = 256;
Chn[i].nCutOff = 0x7F;
}
// Checking instruments
MODINSTRUMENT *pins = Ins;
for (i=0; i<MAX_INSTRUMENTS; i++, pins++)
{
if (pins->pSample)
{
if (pins->nLoopEnd > pins->nLength) pins->nLoopEnd = pins->nLength;
if (pins->nLoopStart + 3 >= pins->nLoopEnd)
{
pins->nLoopStart = 0;
pins->nLoopEnd = 0;
}
if (pins->nSustainEnd > pins->nLength) pins->nSustainEnd = pins->nLength;
if (pins->nSustainStart + 3 >= pins->nSustainEnd)
{
pins->nSustainStart = 0;
pins->nSustainEnd = 0;
}
} else
{
pins->nLength = 0;
pins->nLoopStart = 0;
pins->nLoopEnd = 0;
pins->nSustainStart = 0;
pins->nSustainEnd = 0;
}
if (!pins->nLoopEnd) pins->uFlags &= ~CHN_LOOP;
if (!pins->nSustainEnd) pins->uFlags &= ~CHN_SUSTAINLOOP;
if (pins->nGlobalVol > 64) pins->nGlobalVol = 64;
}
// Check invalid instruments
while ((m_nInstruments > 0) && (!Headers[m_nInstruments]))
m_nInstruments--;
// Set default values
if (m_nSongPreAmp < 0x20) m_nSongPreAmp = 0x20;
if (m_nDefaultTempo < 32) m_nDefaultTempo = 125;
if (!m_nDefaultSpeed) m_nDefaultSpeed = 6;
m_nMusicSpeed = m_nDefaultSpeed;
m_nMusicTempo = m_nDefaultTempo;
m_nGlobalVolume = m_nDefaultGlobalVolume;
m_nNextPattern = 0;
m_nCurrentPattern = 0;
m_nPattern = 0;
m_nBufferCount = 0;
m_nTickCount = m_nMusicSpeed;
m_nNextRow = 0;
m_nRow = 0;
if ((m_nRestartPos >= MAX_ORDERS) || (Order[m_nRestartPos] >= MAX_PATTERNS)) m_nRestartPos = 0;
// Load plugins
if (gpMixPluginCreateProc)
{
for (UINT iPlug=0; iPlug<MAX_MIXPLUGINS; iPlug++)
{
if ((m_MixPlugins[iPlug].Info.dwPluginId1)
|| (m_MixPlugins[iPlug].Info.dwPluginId2))
{
gpMixPluginCreateProc(&m_MixPlugins[iPlug]);
if (m_MixPlugins[iPlug].pMixPlugin)
{
m_MixPlugins[iPlug].pMixPlugin->RestoreAllParameters();
}
}
}
}
if (m_nType)
{
UINT maxpreamp = 0x10+(m_nChannels*8);
if (maxpreamp > 100) maxpreamp = 100;
if (m_nSongPreAmp > maxpreamp) m_nSongPreAmp = maxpreamp;
return TRUE;
}
return FALSE;
}
BOOL CSoundFile::Destroy()
//------------------------
{
int i;
for (i=0; i<MAX_PATTERNS; i++) if (Patterns[i])
{
FreePattern(Patterns[i]);
Patterns[i] = NULL;
}
m_nPatternNames = 0;
if (m_lpszPatternNames)
{
delete [] m_lpszPatternNames;
m_lpszPatternNames = NULL;
}
if (m_lpszSongComments)
{
delete [] m_lpszSongComments;
m_lpszSongComments = NULL;
}
for (i=1; i<MAX_SAMPLES; i++)
{
MODINSTRUMENT *pins = &Ins[i];
if (pins->pSample)
{
FreeSample(pins->pSample);
pins->pSample = NULL;
}
}
for (i=0; i<MAX_INSTRUMENTS; i++)
{
if (Headers[i])
{
delete Headers[i];
Headers[i] = NULL;
}
}
for (i=0; i<MAX_MIXPLUGINS; i++)
{
if ((m_MixPlugins[i].nPluginDataSize) && (m_MixPlugins[i].pPluginData))
{
m_MixPlugins[i].nPluginDataSize = 0;
delete [] (signed char*)m_MixPlugins[i].pPluginData;
m_MixPlugins[i].pPluginData = NULL;
}
m_MixPlugins[i].pMixState = NULL;
if (m_MixPlugins[i].pMixPlugin)
{
m_MixPlugins[i].pMixPlugin->Release();
m_MixPlugins[i].pMixPlugin = NULL;
}
}
m_nType = MOD_TYPE_NONE;
m_nChannels = m_nSamples = m_nInstruments = 0;
return TRUE;
}
//////////////////////////////////////////////////////////////////////////
// Memory Allocation
MODCOMMAND *CSoundFile::AllocatePattern(UINT rows, UINT nchns)
//------------------------------------------------------------
{
MODCOMMAND *p = new MODCOMMAND[rows*nchns];
if (p) memset(p, 0, rows*nchns*sizeof(MODCOMMAND));
return p;
}
void CSoundFile::FreePattern(LPVOID pat)
//--------------------------------------
{
if (pat) delete [] (signed char*)pat;
}
signed char* CSoundFile::AllocateSample(UINT nbytes)
//-------------------------------------------
{
signed char * p = (signed char *)GlobalAllocPtr(GHND, (nbytes+39) & ~7);
if (p) p += 16;
return p;
}
void CSoundFile::FreeSample(LPVOID p)
//-----------------------------------
{
if (p)
{
GlobalFreePtr(((LPSTR)p)-16);
}
}
//////////////////////////////////////////////////////////////////////////
// Misc functions
void CSoundFile::ResetMidiCfg()
//-----------------------------
{
memset(&m_MidiCfg, 0, sizeof(m_MidiCfg));
lstrcpy(&m_MidiCfg.szMidiGlb[MIDIOUT_START*32], "FF");
lstrcpy(&m_MidiCfg.szMidiGlb[MIDIOUT_STOP*32], "FC");
lstrcpy(&m_MidiCfg.szMidiGlb[MIDIOUT_NOTEON*32], "9c n v");
lstrcpy(&m_MidiCfg.szMidiGlb[MIDIOUT_NOTEOFF*32], "9c n 0");
lstrcpy(&m_MidiCfg.szMidiGlb[MIDIOUT_PROGRAM*32], "Cc p");
lstrcpy(&m_MidiCfg.szMidiSFXExt[0], "F0F000z");
for (int iz=0; iz<16; iz++) wsprintf(&m_MidiCfg.szMidiZXXExt[iz*32], "F0F001%02X", iz*8);
}
UINT CSoundFile::GetNumChannels() const
//-------------------------------------
{
UINT n = 0;
for (UINT i=0; i<m_nChannels; i++) if (ChnSettings[i].nVolume) n++;
return n;
}
UINT CSoundFile::GetSongComments(LPSTR s, UINT len, UINT linesize)
//----------------------------------------------------------------
{
LPCSTR p = m_lpszSongComments;
if (!p) return 0;
UINT i = 2, ln=0;
if ((len) && (s)) s[0] = '\x0D';
if ((len > 1) && (s)) s[1] = '\x0A';
while ((*p) && (i+2 < len))
{
BYTE c = (BYTE)*p++;
if ((c == 0x0D) || ((c == ' ') && (ln >= linesize)))
{ if (s) { s[i++] = '\x0D'; s[i++] = '\x0A'; } else i+= 2; ln=0; }
else
if (c >= 0x20) { if (s) s[i++] = c; else i++; ln++; }
}
if (s) s[i] = 0;
return i;
}
UINT CSoundFile::GetRawSongComments(LPSTR s, UINT len, UINT linesize)
//-------------------------------------------------------------------
{
LPCSTR p = m_lpszSongComments;
if (!p) return 0;
UINT i = 0, ln=0;
while ((*p) && (i < len-1))
{
BYTE c = (BYTE)*p++;
if ((c == 0x0D) || (c == 0x0A))
{
if (ln)
{
while (ln < linesize) { if (s) s[i] = ' '; i++; ln++; }
ln = 0;
}
} else
if ((c == ' ') && (!ln))
{
UINT k=0;
while ((p[k]) && (p[k] >= ' ')) k++;
if (k <= linesize)
{
if (s) s[i] = ' ';
i++;
ln++;
}
} else
{
if (s) s[i] = c;
i++;
ln++;
if (ln == linesize) ln = 0;
}
}
if (ln)
{
while ((ln < linesize) && (i < len))
{
if (s) s[i] = ' ';
i++;
ln++;
}
}
if (s) s[i] = 0;
return i;
}
BOOL CSoundFile::SetWaveConfig(UINT nRate,UINT nBits,UINT nChannels,BOOL bMMX)
//----------------------------------------------------------------------------
{
BOOL bReset = FALSE;
DWORD d = gdwSoundSetup & ~SNDMIX_ENABLEMMX;
if (bMMX) d |= SNDMIX_ENABLEMMX;
if ((gdwMixingFreq != nRate) || (gnBitsPerSample != nBits) || (gnChannels != nChannels) || (d != gdwSoundSetup)) bReset = TRUE;
gnChannels = nChannels;
gdwSoundSetup = d;
gdwMixingFreq = nRate;
gnBitsPerSample = nBits;
InitPlayer(bReset);
return TRUE;
}
BOOL CSoundFile::SetMixConfig(UINT nStereoSeparation, UINT nMaxMixChannels)
//-------------------------------------------------------------------------
{
if (nMaxMixChannels < 2) return FALSE;
m_nMaxMixChannels = nMaxMixChannels;
m_nStereoSeparation = nStereoSeparation;
return TRUE;
}
BOOL CSoundFile::SetResamplingMode(UINT nMode)
//--------------------------------------------
{
DWORD d = gdwSoundSetup & ~(SNDMIX_NORESAMPLING|SNDMIX_HQRESAMPLER|SNDMIX_ULTRAHQSRCMODE);
switch(nMode)
{
case SRCMODE_NEAREST: d |= SNDMIX_NORESAMPLING; break;
case SRCMODE_LINEAR: break;
case SRCMODE_SPLINE: d |= SNDMIX_HQRESAMPLER; break;
case SRCMODE_POLYPHASE: d |= (SNDMIX_HQRESAMPLER|SNDMIX_ULTRAHQSRCMODE); break;
default:
return FALSE;
}
gdwSoundSetup = d;
return TRUE;
}
BOOL CSoundFile::SetMasterVolume(UINT nVol, BOOL bAdjustAGC)
//----------------------------------------------------------
{
if (nVol < 1) nVol = 1;
if (nVol > 0x200) nVol = 0x200; // x4 maximum
if ((nVol < m_nMasterVolume) && (nVol) && (gdwSoundSetup & SNDMIX_AGC) && (bAdjustAGC))
{
gnAGC = gnAGC * m_nMasterVolume / nVol;
if (gnAGC > AGC_UNITY) gnAGC = AGC_UNITY;
}
m_nMasterVolume = nVol;
return TRUE;
}
void CSoundFile::SetAGC(BOOL b)
//-----------------------------
{
if (b)
{
if (!(gdwSoundSetup & SNDMIX_AGC))
{
gdwSoundSetup |= SNDMIX_AGC;
gnAGC = AGC_UNITY;
}
} else gdwSoundSetup &= ~SNDMIX_AGC;
}
UINT CSoundFile::GetNumPatterns() const
//-------------------------------------
{
UINT i = 0;
while ((i < MAX_ORDERS) && (Order[i] < 0xFF)) i++;
return i;
}
UINT CSoundFile::GetNumInstruments() const
//----------------------------------------
{
UINT n=0;
for (UINT i=0; i<MAX_INSTRUMENTS; i++) if (Ins[i].pSample) n++;
return n;
}
UINT CSoundFile::GetMaxPosition() const
//-------------------------------------
{
UINT max = 0;
UINT i = 0;
while ((i < MAX_ORDERS) && (Order[i] != 0xFF))
{
if (Order[i] < MAX_PATTERNS) max += PatternSize[Order[i]];
i++;
}
return max;
}
UINT CSoundFile::GetCurrentPos() const
//------------------------------------
{
UINT pos = 0;
for (UINT i=0; i<m_nCurrentPattern; i++) if (Order[i] < MAX_PATTERNS)
pos += PatternSize[Order[i]];
return pos + m_nRow;
}
void CSoundFile::SetCurrentPos(UINT nPos)
//---------------------------------------
{
UINT i, nPattern;
for (i=0; i<MAX_CHANNELS; i++)
{
Chn[i].nNote = Chn[i].nNewNote = Chn[i].nNewIns = 0;
Chn[i].pInstrument = NULL;
Chn[i].pHeader = NULL;
Chn[i].nPortamentoDest = 0;
Chn[i].nCommand = 0;
Chn[i].nPatternLoopCount = 0;
Chn[i].nPatternLoop = 0;
Chn[i].nFadeOutVol = 0;
Chn[i].dwFlags |= CHN_KEYOFF|CHN_NOTEFADE;
Chn[i].nTremorCount = 0;
}
if (!nPos)
{
for (i=0; i<MAX_CHANNELS; i++)
{
Chn[i].nPeriod = 0;
Chn[i].nPos = Chn[i].nLength = 0;
Chn[i].nLoopStart = 0;
Chn[i].nLoopEnd = 0;
Chn[i].nROfs = Chn[i].nLOfs = 0;
Chn[i].pSample = NULL;
Chn[i].pInstrument = NULL;
Chn[i].pHeader = NULL;
Chn[i].nCutOff = 0x7F;
Chn[i].nResonance = 0;
Chn[i].nLeftVol = Chn[i].nRightVol = 0;
Chn[i].nNewLeftVol = Chn[i].nNewRightVol = 0;
Chn[i].nLeftRamp = Chn[i].nRightRamp = 0;
Chn[i].nVolume = 256;
if (i < MAX_BASECHANNELS)
{
Chn[i].dwFlags = ChnSettings[i].dwFlags;
Chn[i].nPan = ChnSettings[i].nPan;
Chn[i].nGlobalVol = ChnSettings[i].nVolume;
} else
{
Chn[i].dwFlags = 0;
Chn[i].nPan = 128;
Chn[i].nGlobalVol = 64;
}
}
m_nGlobalVolume = m_nDefaultGlobalVolume;
m_nMusicSpeed = m_nDefaultSpeed;
m_nMusicTempo = m_nDefaultTempo;
}
m_dwSongFlags &= ~(SONG_PATTERNLOOP|SONG_CPUVERYHIGH|SONG_FADINGSONG|SONG_ENDREACHED|SONG_GLOBALFADE);
for (nPattern = 0; nPattern < MAX_ORDERS; nPattern++)
{
UINT ord = Order[nPattern];
if (ord == 0xFE) continue;
if (ord == 0xFF) break;
if (ord < MAX_PATTERNS)
{
if (nPos < (UINT)PatternSize[ord]) break;
nPos -= PatternSize[ord];
}
}
// Buggy position ?
if ((nPattern >= MAX_ORDERS)
|| (Order[nPattern] >= MAX_PATTERNS)
|| (nPos >= PatternSize[Order[nPattern]]))
{
nPos = 0;
nPattern = 0;
}
UINT nRow = nPos;
if ((nRow) && (Order[nPattern] < MAX_PATTERNS))
{
MODCOMMAND *p = Patterns[Order[nPattern]];
if ((p) && (nRow < PatternSize[Order[nPattern]]))
{
BOOL bOk = FALSE;
while ((!bOk) && (nRow > 0))
{
UINT n = nRow * m_nChannels;
for (UINT k=0; k<m_nChannels; k++, n++)
{
if (p[n].note)
{
bOk = TRUE;
break;
}
}
if (!bOk) nRow--;
}
}
}
m_nNextPattern = nPattern;
m_nNextRow = nRow;
m_nTickCount = m_nMusicSpeed;
m_nBufferCount = 0;
m_nPatternDelay = 0;
m_nFrameDelay = 0;
}
void CSoundFile::SetCurrentOrder(UINT nPos)
//-----------------------------------------
{
while ((nPos < MAX_ORDERS) && (Order[nPos] == 0xFE)) nPos++;
if ((nPos >= MAX_ORDERS) || (Order[nPos] >= MAX_PATTERNS)) return;
for (UINT j=0; j<MAX_CHANNELS; j++)
{
Chn[j].nPeriod = 0;
Chn[j].nNote = 0;
Chn[j].nPortamentoDest = 0;
Chn[j].nCommand = 0;
Chn[j].nPatternLoopCount = 0;
Chn[j].nPatternLoop = 0;
Chn[j].nTremorCount = 0;
}
if (!nPos)
{
SetCurrentPos(0);
} else
{
m_nNextPattern = nPos;
m_nRow = m_nNextRow = 0;
m_nPattern = 0;
m_nTickCount = m_nMusicSpeed;
m_nBufferCount = 0;
m_nTotalCount = 0;
m_nPatternDelay = 0;
m_nFrameDelay = 0;
}
m_dwSongFlags &= ~(SONG_PATTERNLOOP|SONG_CPUVERYHIGH|SONG_FADINGSONG|SONG_ENDREACHED|SONG_GLOBALFADE);
}
void CSoundFile::ResetChannels()
//------------------------------
{
m_dwSongFlags &= ~(SONG_CPUVERYHIGH|SONG_FADINGSONG|SONG_ENDREACHED|SONG_GLOBALFADE);
m_nBufferCount = 0;
for (UINT i=0; i<MAX_CHANNELS; i++)
{
Chn[i].nROfs = Chn[i].nLOfs = 0;
}
}
void CSoundFile::LoopPattern(int nPat, int nRow)
//----------------------------------------------
{
if ((nPat < 0) || (nPat >= MAX_PATTERNS) || (!Patterns[nPat]))
{
m_dwSongFlags &= ~SONG_PATTERNLOOP;
} else
{
if ((nRow < 0) || (nRow >= PatternSize[nPat])) nRow = 0;
m_nPattern = nPat;
m_nRow = m_nNextRow = nRow;
m_nTickCount = m_nMusicSpeed;
m_nPatternDelay = 0;
m_nFrameDelay = 0;
m_nBufferCount = 0;
m_dwSongFlags |= SONG_PATTERNLOOP;
}
}
UINT CSoundFile::GetBestSaveFormat() const
//----------------------------------------
{
if ((!m_nSamples) || (!m_nChannels)) return MOD_TYPE_NONE;
if (!m_nType) return MOD_TYPE_NONE;
if (m_nType & (MOD_TYPE_MOD|MOD_TYPE_OKT))
return MOD_TYPE_MOD;
if (m_nType & (MOD_TYPE_S3M|MOD_TYPE_STM|MOD_TYPE_ULT|MOD_TYPE_FAR|MOD_TYPE_PTM))
return MOD_TYPE_S3M;
if (m_nType & (MOD_TYPE_XM|MOD_TYPE_MED|MOD_TYPE_MTM|MOD_TYPE_MT2))
return MOD_TYPE_XM;
return MOD_TYPE_IT;
}
UINT CSoundFile::GetSaveFormats() const
//-------------------------------------
{
UINT n = 0;
if ((!m_nSamples) || (!m_nChannels) || (m_nType == MOD_TYPE_NONE)) return 0;
switch(m_nType)
{
case MOD_TYPE_MOD: n = MOD_TYPE_MOD;
case MOD_TYPE_S3M: n = MOD_TYPE_S3M;
}
n |= MOD_TYPE_XM | MOD_TYPE_IT;
if (!m_nInstruments)
{
if (m_nSamples < 32) n |= MOD_TYPE_MOD;
n |= MOD_TYPE_S3M;
}
return n;
}
UINT CSoundFile::GetSampleName(UINT nSample,LPSTR s) const
//--------------------------------------------------------
{
char sztmp[40] = ""; // changed from CHAR
memcpy(sztmp, m_szNames[nSample],32);
sztmp[31] = 0;
if (s) strcpy(s, sztmp);
return strlen(sztmp);
}
UINT CSoundFile::GetInstrumentName(UINT nInstr,LPSTR s) const
//-----------------------------------------------------------
{
char sztmp[40] = ""; // changed from CHAR
if ((nInstr >= MAX_INSTRUMENTS) || (!Headers[nInstr]))
{
if (s) *s = 0;
return 0;
}
INSTRUMENTHEADER *penv = Headers[nInstr];
memcpy(sztmp, penv->name, 32);
sztmp[31] = 0;
if (s) strcpy(s, sztmp);
return strlen(sztmp);
}
#ifndef NO_PACKING
UINT CSoundFile::PackSample(int &sample, int next)
//------------------------------------------------
{
UINT i = 0;
int delta = next - sample;
if (delta >= 0)
{
for (i=0; i<7; i++) if (delta <= (int)CompressionTable[i+1]) break;
} else
{
for (i=8; i<15; i++) if (delta >= (int)CompressionTable[i+1]) break;
}
sample += (int)CompressionTable[i];
return i;
}
BOOL CSoundFile::CanPackSample(LPSTR pSample, UINT nLen, UINT nPacking, BYTE *result)
//-----------------------------------------------------------------------------------
{
int pos, old, oldpos, besttable = 0;
DWORD dwErr, dwTotal, dwResult;
int i,j;
if (result) *result = 0;
if ((!pSample) || (nLen < 1024)) return FALSE;
// Try packing with different tables
dwResult = 0;
for (j=1; j<MAX_PACK_TABLES; j++)
{
memcpy(CompressionTable, UnpackTable[j], 16);
dwErr = 0;
dwTotal = 1;
old = pos = oldpos = 0;
for (i=0; i<(int)nLen; i++)
{
int s = (int)pSample[i];
PackSample(pos, s);
dwErr += abs(pos - oldpos);
dwTotal += abs(s - old);
old = s;
oldpos = pos;
}
dwErr = _muldiv(dwErr, 100, dwTotal);
if (dwErr >= dwResult)
{
dwResult = dwErr;
besttable = j;
}
}
memcpy(CompressionTable, UnpackTable[besttable], 16);
if (result)
{
if (dwResult > 100) *result = 100; else *result = (BYTE)dwResult;
}
return (dwResult >= nPacking) ? TRUE : FALSE;
}
#endif // NO_PACKING
#ifndef MODPLUG_NO_FILESAVE
UINT CSoundFile::WriteSample(FILE *f, MODINSTRUMENT *pins, UINT nFlags, UINT nMaxLen)
//-----------------------------------------------------------------------------------
{
UINT len = 0, bufcount;
signed char buffer[4096];
signed char *pSample = (signed char *)pins->pSample;
UINT nLen = pins->nLength;
if ((nMaxLen) && (nLen > nMaxLen)) nLen = nMaxLen;
if ((!pSample) || (f == NULL) || (!nLen)) return 0;
switch(nFlags)
{
#ifndef NO_PACKING
// 3: 4-bit ADPCM data
case RS_ADPCM4:
{
int pos;
len = (nLen + 1) / 2;
fwrite(CompressionTable, 16, 1, f);
bufcount = 0;
pos = 0;
for (UINT j=0; j<len; j++)
{
BYTE b;
// Sample #1
b = PackSample(pos, (int)pSample[j*2]);
// Sample #2
b |= PackSample(pos, (int)pSample[j*2+1]) << 4;
buffer[bufcount++] = (signed char)b;
if (bufcount >= sizeof(buffer))
{
fwrite(buffer, 1, bufcount, f);
bufcount = 0;
}
}
if (bufcount) fwrite(buffer, 1, bufcount, f);
len += 16;
}
break;
#endif // NO_PACKING
// 16-bit samples
case RS_PCM16U:
case RS_PCM16D:
case RS_PCM16S:
{
int16_t *p = (int16_t *)pSample;
int s_old = 0, s_ofs;
len = nLen * 2;
bufcount = 0;
s_ofs = (nFlags == RS_PCM16U) ? 0x8000 : 0;
for (UINT j=0; j<nLen; j++)
{
int s_new = *p;
p++;
if (pins->uFlags & CHN_STEREO)
{
s_new = (s_new + (*p) + 1) >> 1;
p++;
}
if (nFlags == RS_PCM16D)
{
int16_t temp = bswapLE16((int16_t)(s_new - s_old));
*((int16_t*)(&buffer[bufcount])) = temp;
s_old = s_new;
} else
{
int16_t temp = bswapLE16((int16_t)(s_new + s_ofs));
*((int16_t *)(&buffer[bufcount])) = temp;
}
bufcount += 2;
if (bufcount >= sizeof(buffer) - 1)
{
fwrite(buffer, 1, bufcount, f);
bufcount = 0;
}
}
if (bufcount) fwrite(buffer, 1, bufcount, f);
}
break;
// 8-bit Stereo samples (not interleaved)
case RS_STPCM8S:
case RS_STPCM8U:
case RS_STPCM8D:
{
int s_ofs = (nFlags == RS_STPCM8U) ? 0x80 : 0;
for (UINT iCh=0; iCh<2; iCh++)
{
signed char *p = pSample + iCh;
int s_old = 0;
bufcount = 0;
for (UINT j=0; j<nLen; j++)
{
int s_new = *p;
p += 2;
if (nFlags == RS_STPCM8D)
{
buffer[bufcount++] = (signed char)(s_new - s_old);
s_old = s_new;
} else
{
buffer[bufcount++] = (signed char)(s_new + s_ofs);
}
if (bufcount >= sizeof(buffer))
{
fwrite(buffer, 1, bufcount, f);
bufcount = 0;
}
}
if (bufcount) fwrite(buffer, 1, bufcount, f);
}
}
len = nLen * 2;
break;
// 16-bit Stereo samples (not interleaved)
case RS_STPCM16S:
case RS_STPCM16U:
case RS_STPCM16D:
{