?? modeng.c
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static VOID OnSyncMark(LPTRACK lpTrack){ if (!Player.nFrame && Player.lpfnCallback) Player.lpfnCallback(lpTrack->bParams, Player.nOrder, Player.nRow);}static VOID OnNothing(LPTRACK lpTrack){ /* does nothing, just avoid compiler warnings */ if (lpTrack != NULL) { }}static VOID ExecNoteCmd(LPTRACK lpTrack){ static VOID (*CommandProcTable[36])(LPTRACK) = { OnArpeggio, /* 0xy */ OnPortaUp, /* 1xx */ OnPortaDown, /* 2xx */ OnTonePorta, /* 3xx */ OnVibrato, /* 4xy */ OnToneAndSlide, /* 5xy */ OnVibratoAndSlide, /* 6xy */ OnTremolo, /* 7xy */ OnSetPanning, /* 8xx */ OnSampleOffset, /* 9xx */ OnVolumeSlide, /* Axy */ OnJumpPosition, /* Bxx */ OnSetVolume, /* Cxx */ OnPatternBreak, /* Dxx */ OnExtraCommand, /* Exy */ OnSetSpeed, /* Fxx */ OnSetGlobalVolume, /* Gxx */ OnGlobalVolumeSlide, /* Hxy */ OnNothing, /* Ixx */ OnNothing, /* Jxx */ OnKeyOff, /* Kxx */ OnSetEnvelope, /* Lxx */ OnNothing, /* Mxx */ OnNothing, /* Nxx */ OnNothing, /* Oxx */ OnPanningSlide, /* Pxy */ OnNothing, /* Qxx */ OnMultiRetrig, /* Rxy */ OnNothing, /* Sxx */ OnTremor, /* Txy */ OnFineVibrato, /* Uxy */ OnNothing, /* Vxx */ OnNothing, /* Wxx */ OnExtraFinePorta, /* Xxy */ OnNothing, /* Yxx */ OnSyncMark /* Zxx */ }; if ((lpTrack->nCommand || lpTrack->bParams) && lpTrack->nCommand < 36) { (*CommandProcTable[lpTrack->nCommand]) (lpTrack); }}static VOID ExecVolumeCmd(LPTRACK lpTrack){ UINT nCommand; nCommand = lpTrack->nVolumeCmd; if (nCommand >= 0x10 && nCommand <= 0x50) { /* set volume */ if (!Player.nFrame) { lpTrack->nVolume = nCommand - 0x10; lpTrack->nOutVolume = lpTrack->nVolume; lpTrack->bControl |= AUDIO_CTRL_VOLUME; } } else if (nCommand >= 0x60 && nCommand <= 0x6F) { /* volume slide down */ if (Player.nFrame) { lpTrack->nVolume -= LOPARAM(nCommand); if (lpTrack->nVolume < AUDIO_MIN_VOLUME) lpTrack->nVolume = AUDIO_MIN_VOLUME; lpTrack->nOutVolume = lpTrack->nVolume; lpTrack->bControl |= AUDIO_CTRL_VOLUME; } } else if (nCommand >= 0x70 && nCommand <= 0x7F) { /* volume slide up */ if (Player.nFrame) { lpTrack->nVolume += LOPARAM(nCommand); if (lpTrack->nVolume > AUDIO_MAX_VOLUME) lpTrack->nVolume = AUDIO_MAX_VOLUME; lpTrack->nOutVolume = lpTrack->nVolume; lpTrack->bControl |= AUDIO_CTRL_VOLUME; } } else if (nCommand >= 0x80 && nCommand <= 0x8F) { /* fine volume slide down */ if (!Player.nFrame) { lpTrack->nVolume -= LOPARAM(nCommand); if (lpTrack->nVolume < AUDIO_MIN_VOLUME) lpTrack->nVolume = AUDIO_MIN_VOLUME; lpTrack->nOutVolume = lpTrack->nVolume; lpTrack->bControl |= AUDIO_CTRL_VOLUME; } } else if (nCommand >= 0x90 && nCommand <= 0x9F) { /* fine volume slide up */ if (!Player.nFrame) { lpTrack->nVolume += LOPARAM(nCommand); if (lpTrack->nVolume > AUDIO_MAX_VOLUME) lpTrack->nVolume = AUDIO_MAX_VOLUME; lpTrack->nOutVolume = lpTrack->nVolume; lpTrack->bControl |= AUDIO_CTRL_VOLUME; } } else if (nCommand >= 0xA0 && nCommand <= 0xAF) { /* set vibrato speed */ if (!Player.nFrame) { if (LOPARAM(nCommand)) { lpTrack->nVibratoRate = LOPARAM(nCommand) << 2; } } } else if (nCommand >= 0xB0 && nCommand <= 0xBF) { /* vibrato */ if (!Player.nFrame) { if (LOPARAM(nCommand)) { lpTrack->nVibratoDepth = LOPARAM(nCommand); } } else { OnVibrato(lpTrack); } } else if (nCommand >= 0xC0 && nCommand <= 0xCF) { /* set coarse panning */ if (!Player.nFrame) { lpTrack->nPanning = LOPARAM(nCommand) << 4; lpTrack->bControl |= AUDIO_CTRL_PANNING; } } else if (nCommand >= 0xD0 && nCommand <= 0xDF) { /* panning slide left */ if (Player.nFrame) { lpTrack->nPanning -= LOPARAM(nCommand); if (lpTrack->nPanning < AUDIO_MIN_PANNING) lpTrack->nPanning = AUDIO_MIN_PANNING; lpTrack->bControl |= AUDIO_CTRL_PANNING; } } else if (nCommand >= 0xE0 && nCommand <= 0xEF) { /* panning slide right */ if (Player.nFrame) { lpTrack->nPanning += LOPARAM(nCommand); if (lpTrack->nPanning > AUDIO_MAX_PANNING) lpTrack->nPanning = AUDIO_MAX_PANNING; lpTrack->bControl |= AUDIO_CTRL_PANNING; } } else if (nCommand >= 0xF0 && nCommand <= 0xFF) { /* tone portamento */ if (Player.nFrame) OnTonePorta(lpTrack); }}static VOID StartEnvelopes(LPTRACK lpTrack){ LPAUDIOPATCH lpPatch; /* reset vibrato and tremolo waves */ if (!(lpTrack->bWaveCtrl & 0x04)) lpTrack->nVibratoFrame = 0; if (!(lpTrack->bWaveCtrl & 0x40)) lpTrack->nTremoloFrame = 0; /* reset retrig and tremor frames */ lpTrack->nRetrigFrame = 0; lpTrack->nTremorFrame = 0; lpTrack->bTremorOnOff = 0; lpPatch = lpTrack->lpPatch; /* start volume envelope */ if (lpPatch != NULL && (lpPatch->Volume.wFlags & AUDIO_ENVELOPE_ON)) { lpTrack->nVolumeFrame = -1; lpTrack->nVolumePoint = 0; } /* start panning envelope */ if (lpPatch != NULL && (lpPatch->Panning.wFlags & AUDIO_ENVELOPE_ON)) { lpTrack->nPanningFrame = -1; lpTrack->nPanningPoint = 0; } /* start volume fadeout */ if (lpPatch != NULL) lpTrack->nVolumeFadeout = lpPatch->nVolumeFadeout; lpTrack->nVolumeFade = 0x7FFF; /* start automatic vibrato */ if (lpPatch != NULL && lpPatch->nVibratoDepth) { lpTrack->nAutoVibratoFrame = 0; if (lpPatch->nVibratoSweep) { lpTrack->nAutoVibratoSlope = ((int) lpPatch->nVibratoDepth << 8) / lpPatch->nVibratoSweep; lpTrack->nAutoVibratoValue = 0; } else { lpTrack->nAutoVibratoSlope = 0; lpTrack->nAutoVibratoValue = ((int) lpPatch->nVibratoDepth << 8); } }}static VOID UpdateEnvelopes(LPTRACK lpTrack){ LPAUDIOPATCH lpPatch; LPAUDIOPOINT lpPts; int nFrames, nValue; /* get patch structure alias */ lpPatch = lpTrack->lpPatch; /* process volume fadeout */ if (lpPatch != NULL && !lpTrack->fKeyOn) { if ((lpTrack->nVolumeFade -= lpTrack->nVolumeFadeout) < 0) { lpTrack->nVolumeFadeout = 0; lpTrack->nVolumeFade = 0; } lpTrack->bControl |= AUDIO_CTRL_VOLUME; } /* process volume envelope */ if (lpPatch != NULL && (lpPatch->Volume.wFlags & AUDIO_ENVELOPE_ON)) { lpPts = lpPatch->Volume.aEnvelope; if (++lpTrack->nVolumeFrame >= lpPts[lpTrack->nVolumePoint].nFrame) { if ((lpPatch->Volume.wFlags & AUDIO_ENVELOPE_SUSTAIN) && (lpTrack->nVolumePoint == lpPatch->Volume.nSustain) && lpTrack->fKeyOn) { lpTrack->nVolumeFrame = lpPts[lpTrack->nVolumePoint].nFrame; lpTrack->nVolumeValue = (int) lpPts[lpTrack->nVolumePoint].nValue << 8; } else { if ((lpPatch->Volume.wFlags & AUDIO_ENVELOPE_LOOP) && (lpTrack->nVolumePoint == lpPatch->Volume.nLoopEnd)) { lpTrack->nVolumePoint = lpPatch->Volume.nLoopStart; } lpTrack->nVolumeFrame = lpPts[lpTrack->nVolumePoint].nFrame; lpTrack->nVolumeValue = (int) lpPts[lpTrack->nVolumePoint].nValue << 8; if (lpTrack->nVolumePoint + 1 >= lpPatch->Volume.nPoints) { lpTrack->nVolumeSlope = 0; } else { if ((nFrames = lpPts[lpTrack->nVolumePoint + 1].nFrame - lpPts[lpTrack->nVolumePoint].nFrame) <= 0) lpTrack->nVolumeSlope = 0; else { lpTrack->nVolumeSlope = (((int) lpPts[lpTrack->nVolumePoint + 1].nValue - (int) lpPts[lpTrack->nVolumePoint].nValue) << 8) / nFrames; } lpTrack->nVolumePoint++; } } } else { lpTrack->nVolumeValue += lpTrack->nVolumeSlope; lpTrack->nVolumeValue = CLIP(lpTrack->nVolumeValue, 0, 64 * 256); } lpTrack->nFinalVolume = (((LONG) (lpTrack->nVolumeValue >> 8) * lpTrack->nOutVolume) * lpTrack->nVolumeFade) >> 21; lpTrack->bControl |= AUDIO_CTRL_VOLUME; } else { lpTrack->nFinalVolume = lpTrack->nOutVolume; if (lpTrack->nVolumeFade != 0x7FFF) lpTrack->nFinalVolume = ((LONG) lpTrack->nFinalVolume * lpTrack->nVolumeFade) >> 15; } /* process panning envelope */ if (lpPatch != NULL && (lpPatch->Panning.wFlags & AUDIO_ENVELOPE_ON)) { lpPts = lpPatch->Panning.aEnvelope; if (++lpTrack->nPanningFrame >= lpPts[lpTrack->nPanningPoint].nFrame) { if ((lpPatch->Panning.wFlags & AUDIO_ENVELOPE_SUSTAIN) && (lpTrack->nPanningPoint == lpPatch->Panning.nSustain) && lpTrack->fKeyOn) { lpTrack->nPanningFrame = lpPts[lpTrack->nPanningPoint].nFrame; lpTrack->nPanningValue = (int) lpPts[lpTrack->nPanningPoint].nValue << 8; } else { if ((lpPatch->Panning.wFlags & AUDIO_ENVELOPE_LOOP) && (lpTrack->nPanningPoint == lpPatch->Panning.nLoopEnd)) { lpTrack->nPanningPoint = lpPatch->Panning.nLoopStart; } lpTrack->nPanningFrame = lpPts[lpTrack->nPanningPoint].nFrame; lpTrack->nPanningValue = (int) lpPts[lpTrack->nPanningPoint].nValue << 8; if (lpTrack->nPanningPoint + 1 >= lpPatch->Panning.nPoints) { lpTrack->nPanningSlope = 0; } else { if ((nFrames = lpPts[lpTrack->nPanningPoint + 1].nFrame - lpPts[lpTrack->nPanningPoint].nFrame) <= 0) lpTrack->nPanningSlope = 0; else { lpTrack->nPanningSlope = (((int) lpPts[lpTrack->nPanningPoint + 1].nValue - (int) lpPts[lpTrack->nPanningPoint].nValue) << 8) / nFrames; } lpTrack->nPanningPoint++; } } } else { lpTrack->nPanningValue += lpTrack->nPanningSlope; lpTrack->nPanningValue = CLIP(lpTrack->nPanningValue, 0, 64 * 256); } lpTrack->nFinalPanning = lpTrack->nPanning + ((((128L - ABS(lpTrack->nPanning - 128)) << 3) * (lpTrack->nPanningValue - 32 * 256L)) >> 16); lpTrack->bControl |= AUDIO_CTRL_PANNING; } else { lpTrack->nFinalPanning = lpTrack->nPanning; } /* process automatic vibrato */ if (lpPatch != NULL && lpPatch->nVibratoDepth != 0) { if (lpTrack->fKeyOn && lpTrack->nAutoVibratoSlope) { lpTrack->nAutoVibratoValue += lpTrack->nAutoVibratoSlope; if (lpTrack->nAutoVibratoValue > ((int) lpPatch->nVibratoDepth << 8)) { lpTrack->nAutoVibratoValue = (int) lpPatch->nVibratoDepth << 8; lpTrack->nAutoVibratoSlope = 0; } } lpTrack->nAutoVibratoFrame += lpPatch->nVibratoRate; nFrames = (BYTE) lpTrack->nAutoVibratoFrame; switch (lpPatch->nVibratoType) { case 0x00: nValue = aAutoVibratoTable[nFrames]; break; case 0x01: nValue = (nFrames & 0x80) ? +64 : -64; break; case 0x02: nValue = ((64 + (nFrames >> 1)) & 0x7f) - 64; break; case 0x03: nValue = ((64 - (nFrames >> 1)) & 0x7f) - 64; break; default: /* unknown vibrato waveform type */ nValue = 0; break; } lpTrack->nFinalPeriod = lpTrack->nOutPeriod + ((((LONG) nValue << 2) * lpTrack->nAutoVibratoValue) >> 16); lpTrack->nFinalPeriod = CLIP(lpTrack->nFinalPeriod, AUDIO_MIN_PERIOD, AUDIO_MAX_PERIOD); lpTrack->bControl |= AUDIO_CTRL_PITCH; } else { lpTrack->nFinalPeriod = lpTrack->nOutPeriod; }}static VOID PlayNote(LPTRACK lpTrack){ LPAUDIOPATCH lpPatch; LPAUDIOSAMPLE lpSample; lpTrack->fKeyOn = (lpTrack->nNote >= 1 && lpTrack->nNote <= AUDIO_MAX_NOTES); if (lpTrack->fKeyOn && (lpPatch = lpTrack->lpPatch) != NULL) { lpTrack->nSample = lpPatch->aSampleNumber[lpTrack->nNote - 1]; if (lpTrack->nSample < lpPatch->nSamples) { lpTrack->lpSample = &lpPatch->aSampleTable[lpTrack->nSample]; lpSample = lpTrack->lpSample; lpTrack->nRelativeNote = (signed char) lpSample->nRelativeNote; lpTrack->nFinetune = (signed char) lpSample->nFinetune; if (lpTrack->nCommand != 0x03 && lpTrack->nCommand != 0x05 && (lpTrack->nVolumeCmd & 0xF0) != 0xF0) { lpTrack->nPeriod = lpTrack->nOutPeriod = GetPeriodValue(lpTrack->nNote, lpTrack->nRelativeNote, lpTrack->nFinetune); lpTrack->bControl |= (AUDIO_CTRL_PITCH | AUDIO_CTRL_KEYON); } } else { lpTrack->lpSample = NULL; } }}static VOID StopNote(LPTRACK lpTrack){ lpTrack->fKeyOn = 0; if (lpTrack->lpPatch != NULL) { if (!(lpTrack->lpPatch->Volume.wFlags & AUDIO_ENVELOPE_ON)) { lpTrack->nVolume = lpTrack->nOutVolume = 0; lpTrack->bControl |= (AUDIO_CTRL_VOLUME | AUDIO_CTRL_KEYOFF); } } else { lpTrack->bControl |= AUDIO_CTRL_KEYOFF; }}static VOID RetrigNote(LPTRACK lpTrack){ PlayNote(lpTrack); StartEnvelopes(lpTrack);}?? 快捷鍵說明
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