mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-24 18:51:11 +00:00
503 lines
14 KiB
C++
503 lines
14 KiB
C++
/*
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* This source code is public domain.
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*
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* Authors: Olivier Lapicque <olivierl@jps.net>
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*/
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//////////////////////////////////////////////
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// DigiTracker (MDL) module loader //
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//////////////////////////////////////////////
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#include "stdafx.h"
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#include "sndfile.h"
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//#pragma warning(disable:4244)
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typedef struct MDLSONGHEADER
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{
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DWORD id; // "DMDL" = 0x4C444D44
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BYTE version;
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} MDLSONGHEADER;
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typedef struct MDLINFOBLOCK
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{
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CHAR songname[32];
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CHAR composer[20];
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WORD norders;
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WORD repeatpos;
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BYTE globalvol;
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BYTE speed;
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BYTE tempo;
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BYTE channelinfo[32];
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BYTE seq[256];
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} MDLINFOBLOCK;
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typedef struct MDLPATTERNDATA
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{
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BYTE channels;
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BYTE lastrow; // nrows = lastrow+1
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CHAR name[16];
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WORD data[1];
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} MDLPATTERNDATA;
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void ConvertMDLCommand(MODCOMMAND *m, UINT eff, UINT data)
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//--------------------------------------------------------
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{
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UINT command = 0, param = data;
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switch(eff)
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{
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case 0x01: command = CMD_PORTAMENTOUP; break;
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case 0x02: command = CMD_PORTAMENTODOWN; break;
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case 0x03: command = CMD_TONEPORTAMENTO; break;
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case 0x04: command = CMD_VIBRATO; break;
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case 0x05: command = CMD_ARPEGGIO; break;
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case 0x07: command = (param < 0x20) ? CMD_SPEED : CMD_TEMPO; break;
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case 0x08: command = CMD_PANNING8; param <<= 1; break;
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case 0x0B: command = CMD_POSITIONJUMP; break;
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case 0x0C: command = CMD_GLOBALVOLUME; break;
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case 0x0D: command = CMD_PATTERNBREAK; param = (data & 0x0F) + (data>>4)*10; break;
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case 0x0E:
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command = CMD_S3MCMDEX;
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switch(data & 0xF0)
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{
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case 0x00: command = 0; break; // What is E0x in MDL (there is a bunch) ?
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case 0x10: if (param & 0x0F) { param |= 0xF0; command = CMD_PANNINGSLIDE; } else command = 0; break;
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case 0x20: if (param & 0x0F) { param = (param << 4) | 0x0F; command = CMD_PANNINGSLIDE; } else command = 0; break;
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case 0x30: param = (data & 0x0F) | 0x10; break; // glissando
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case 0x40: param = (data & 0x0F) | 0x30; break; // vibrato waveform
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case 0x60: param = (data & 0x0F) | 0xB0; break;
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case 0x70: param = (data & 0x0F) | 0x40; break; // tremolo waveform
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case 0x90: command = CMD_RETRIG; param &= 0x0F; break;
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case 0xA0: param = (data & 0x0F) << 4; command = CMD_GLOBALVOLSLIDE; break;
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case 0xB0: param = data & 0x0F; command = CMD_GLOBALVOLSLIDE; break;
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case 0xF0: param = ((data >> 8) & 0x0F) | 0xA0; break;
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}
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break;
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case 0x0F: command = CMD_SPEED; break;
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case 0x10: if ((param & 0xF0) != 0xE0) { command = CMD_VOLUMESLIDE; if ((param & 0xF0) == 0xF0) param = ((param << 4) | 0x0F); else param >>= 2; } break;
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case 0x20: if ((param & 0xF0) != 0xE0) { command = CMD_VOLUMESLIDE; if ((param & 0xF0) != 0xF0) param >>= 2; } break;
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case 0x30: command = CMD_RETRIG; break;
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case 0x40: command = CMD_TREMOLO; break;
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case 0x50: command = CMD_TREMOR; break;
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case 0xEF: if (param > 0xFF) param = 0xFF; command = CMD_OFFSET; break;
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}
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if (command)
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{
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m->command = command;
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m->param = param;
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}
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}
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void UnpackMDLTrack(MODCOMMAND *pat, UINT nChannels, UINT nRows, UINT nTrack, const BYTE *lpTracks)
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//-------------------------------------------------------------------------------------------------
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{
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MODCOMMAND cmd, *m = pat;
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UINT len = *((WORD *)lpTracks);
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UINT pos = 0, row = 0, i;
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lpTracks += 2;
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for (UINT ntrk=1; ntrk<nTrack; ntrk++)
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{
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lpTracks += len;
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len = *((WORD *)lpTracks);
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lpTracks += 2;
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}
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cmd.note = cmd.instr = 0;
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cmd.volcmd = cmd.vol = 0;
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cmd.command = cmd.param = 0;
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while ((row < nRows) && (pos < len))
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{
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UINT xx;
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BYTE b = lpTracks[pos++];
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xx = b >> 2;
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switch(b & 0x03)
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{
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case 0x01:
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for (i=0; i<=xx; i++)
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{
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if (row) *m = *(m-nChannels);
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m += nChannels;
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row++;
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if (row >= nRows) break;
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}
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break;
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case 0x02:
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if (xx < row) *m = pat[nChannels*xx];
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m += nChannels;
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row++;
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break;
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case 0x03:
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{
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cmd.note = (xx & 0x01) ? lpTracks[pos++] : 0;
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cmd.instr = (xx & 0x02) ? lpTracks[pos++] : 0;
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cmd.volcmd = cmd.vol = 0;
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cmd.command = cmd.param = 0;
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if ((cmd.note < 120-12) && (cmd.note)) cmd.note += 12;
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UINT volume = (xx & 0x04) ? lpTracks[pos++] : 0;
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UINT commands = (xx & 0x08) ? lpTracks[pos++] : 0;
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UINT command1 = commands & 0x0F;
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UINT command2 = commands & 0xF0;
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UINT param1 = (xx & 0x10) ? lpTracks[pos++] : 0;
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UINT param2 = (xx & 0x20) ? lpTracks[pos++] : 0;
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if ((command1 == 0x0E) && ((param1 & 0xF0) == 0xF0) && (!command2))
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{
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param1 = ((param1 & 0x0F) << 8) | param2;
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command1 = 0xEF;
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command2 = param2 = 0;
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}
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if (volume)
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{
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cmd.volcmd = VOLCMD_VOLUME;
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cmd.vol = (volume+1) >> 2;
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}
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ConvertMDLCommand(&cmd, command1, param1);
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if ((cmd.command != CMD_SPEED)
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&& (cmd.command != CMD_TEMPO)
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&& (cmd.command != CMD_PATTERNBREAK))
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ConvertMDLCommand(&cmd, command2, param2);
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*m = cmd;
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m += nChannels;
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row++;
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}
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break;
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// Empty Slots
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default:
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row += xx+1;
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m += (xx+1)*nChannels;
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if (row >= nRows) break;
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}
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}
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}
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BOOL CSoundFile::ReadMDL(const BYTE *lpStream, DWORD dwMemLength)
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//---------------------------------------------------------------
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{
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DWORD dwMemPos, dwPos, blocklen, dwTrackPos;
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const MDLSONGHEADER *pmsh = (const MDLSONGHEADER *)lpStream;
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MDLINFOBLOCK *pmib;
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MDLPATTERNDATA *pmpd;
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UINT i,j, norders = 0, npatterns = 0, ntracks = 0;
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UINT ninstruments = 0, nsamples = 0;
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WORD block;
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WORD patterntracks[MAX_PATTERNS*32];
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BYTE smpinfo[MAX_SAMPLES];
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BYTE insvolenv[MAX_INSTRUMENTS];
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BYTE inspanenv[MAX_INSTRUMENTS];
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LPCBYTE pvolenv, ppanenv, ppitchenv;
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UINT nvolenv, npanenv, npitchenv;
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if ((!lpStream) || (dwMemLength < 1024)) return FALSE;
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if ((pmsh->id != 0x4C444D44) || ((pmsh->version & 0xF0) > 0x10)) return FALSE;
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memset(patterntracks, 0, sizeof(patterntracks));
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memset(smpinfo, 0, sizeof(smpinfo));
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memset(insvolenv, 0, sizeof(insvolenv));
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memset(inspanenv, 0, sizeof(inspanenv));
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dwMemPos = 5;
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dwTrackPos = 0;
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pvolenv = ppanenv = ppitchenv = NULL;
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nvolenv = npanenv = npitchenv = 0;
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m_nSamples = m_nInstruments = 0;
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while (dwMemPos+6 < dwMemLength)
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{
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block = *((WORD *)(lpStream+dwMemPos));
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blocklen = *((DWORD *)(lpStream+dwMemPos+2));
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dwMemPos += 6;
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if (dwMemPos + blocklen > dwMemLength)
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{
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if (dwMemPos == 11) return FALSE;
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break;
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}
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switch(block)
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{
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// IN: infoblock
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case 0x4E49:
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pmib = (MDLINFOBLOCK *)(lpStream+dwMemPos);
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memcpy(m_szNames[0], pmib->songname, 32);
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norders = pmib->norders;
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if (norders > MAX_ORDERS) norders = MAX_ORDERS;
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m_nRestartPos = pmib->repeatpos;
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m_nDefaultGlobalVolume = pmib->globalvol;
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m_nDefaultTempo = pmib->tempo;
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m_nDefaultSpeed = pmib->speed;
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m_nChannels = 4;
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for (i=0; i<32; i++)
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{
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ChnSettings[i].nVolume = 64;
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ChnSettings[i].nPan = (pmib->channelinfo[i] & 0x7F) << 1;
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if (pmib->channelinfo[i] & 0x80)
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ChnSettings[i].dwFlags |= CHN_MUTE;
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else
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m_nChannels = i+1;
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}
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for (j=0; j<norders; j++) Order[j] = pmib->seq[j];
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break;
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// ME: song message
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case 0x454D:
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if (blocklen)
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{
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if (m_lpszSongComments) delete m_lpszSongComments;
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m_lpszSongComments = new char[blocklen];
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if (m_lpszSongComments)
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{
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memcpy(m_lpszSongComments, lpStream+dwMemPos, blocklen);
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m_lpszSongComments[blocklen-1] = 0;
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}
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}
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break;
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// PA: Pattern Data
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case 0x4150:
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npatterns = lpStream[dwMemPos];
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if (npatterns > MAX_PATTERNS) npatterns = MAX_PATTERNS;
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dwPos = dwMemPos + 1;
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for (i=0; i<npatterns; i++)
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{
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if (dwPos+18 >= dwMemLength) break;
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pmpd = (MDLPATTERNDATA *)(lpStream + dwPos);
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if (pmpd->channels > 32) break;
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PatternSize[i] = pmpd->lastrow+1;
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if (m_nChannels < pmpd->channels) m_nChannels = pmpd->channels;
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dwPos += 18 + 2*pmpd->channels;
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for (j=0; j<pmpd->channels; j++)
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{
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patterntracks[i*32+j] = pmpd->data[j];
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}
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}
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break;
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// TR: Track Data
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case 0x5254:
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if (dwTrackPos) break;
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ntracks = *((WORD *)(lpStream+dwMemPos));
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dwTrackPos = dwMemPos+2;
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break;
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// II: Instruments
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case 0x4949:
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ninstruments = lpStream[dwMemPos];
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dwPos = dwMemPos+1;
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for (i=0; i<ninstruments; i++)
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{
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UINT nins = lpStream[dwPos];
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if ((nins >= MAX_INSTRUMENTS) || (!nins)) break;
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if (m_nInstruments < nins) m_nInstruments = nins;
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if (!Headers[nins])
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{
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UINT note = 12;
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if ((Headers[nins] = new INSTRUMENTHEADER) == NULL) break;
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INSTRUMENTHEADER *penv = Headers[nins];
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memset(penv, 0, sizeof(INSTRUMENTHEADER));
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memcpy(penv->name, lpStream+dwPos+2, 32);
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penv->nGlobalVol = 64;
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penv->nPPC = 5*12;
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for (j=0; j<lpStream[dwPos+1]; j++)
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{
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const BYTE *ps = lpStream+dwPos+34+14*j;
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while ((note < (UINT)(ps[1]+12)) && (note < 120))
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{
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penv->NoteMap[note] = note+1;
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if (ps[0] < MAX_SAMPLES)
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{
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int ismp = ps[0];
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penv->Keyboard[note] = ps[0];
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Ins[ismp].nVolume = ps[2];
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Ins[ismp].nPan = ps[4] << 1;
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Ins[ismp].nVibType = ps[11];
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Ins[ismp].nVibSweep = ps[10];
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Ins[ismp].nVibDepth = ps[9];
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Ins[ismp].nVibRate = ps[8];
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}
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penv->nFadeOut = (ps[7] << 8) | ps[6];
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if (penv->nFadeOut == 0xFFFF) penv->nFadeOut = 0;
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note++;
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}
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// Use volume envelope ?
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if (ps[3] & 0x80)
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{
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penv->dwFlags |= ENV_VOLUME;
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insvolenv[nins] = (ps[3] & 0x3F) + 1;
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}
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// Use panning envelope ?
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if (ps[5] & 0x80)
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{
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penv->dwFlags |= ENV_PANNING;
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inspanenv[nins] = (ps[5] & 0x3F) + 1;
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}
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}
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}
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dwPos += 34 + 14*lpStream[dwPos+1];
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}
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for (j=1; j<=m_nInstruments; j++) if (!Headers[j])
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{
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Headers[j] = new INSTRUMENTHEADER;
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if (Headers[j]) memset(Headers[j], 0, sizeof(INSTRUMENTHEADER));
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}
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break;
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// VE: Volume Envelope
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case 0x4556:
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if ((nvolenv = lpStream[dwMemPos]) == 0) break;
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if (dwMemPos + nvolenv*32 + 1 <= dwMemLength) pvolenv = lpStream + dwMemPos + 1;
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break;
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// PE: Panning Envelope
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case 0x4550:
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if ((npanenv = lpStream[dwMemPos]) == 0) break;
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if (dwMemPos + npanenv*32 + 1 <= dwMemLength) ppanenv = lpStream + dwMemPos + 1;
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break;
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// FE: Pitch Envelope
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case 0x4546:
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if ((npitchenv = lpStream[dwMemPos]) == 0) break;
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if (dwMemPos + npitchenv*32 + 1 <= dwMemLength) ppitchenv = lpStream + dwMemPos + 1;
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break;
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// IS: Sample Infoblock
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case 0x5349:
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nsamples = lpStream[dwMemPos];
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dwPos = dwMemPos+1;
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for (i=0; i<nsamples; i++, dwPos += 59)
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{
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UINT nins = lpStream[dwPos];
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if ((nins >= MAX_SAMPLES) || (!nins)) continue;
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if (m_nSamples < nins) m_nSamples = nins;
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MODINSTRUMENT *pins = &Ins[nins];
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memcpy(m_szNames[nins], lpStream+dwPos+1, 32);
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memcpy(pins->name, lpStream+dwPos+33, 8);
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pins->nC4Speed = *((DWORD *)(lpStream+dwPos+41));
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pins->nLength = *((DWORD *)(lpStream+dwPos+45));
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pins->nLoopStart = *((DWORD *)(lpStream+dwPos+49));
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pins->nLoopEnd = pins->nLoopStart + *((DWORD *)(lpStream+dwPos+53));
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if (pins->nLoopEnd > pins->nLoopStart) pins->uFlags |= CHN_LOOP;
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pins->nGlobalVol = 64;
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if (lpStream[dwPos+58] & 0x01)
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{
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pins->uFlags |= CHN_16BIT;
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pins->nLength >>= 1;
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pins->nLoopStart >>= 1;
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pins->nLoopEnd >>= 1;
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}
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if (lpStream[dwPos+58] & 0x02) pins->uFlags |= CHN_PINGPONGLOOP;
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smpinfo[nins] = (lpStream[dwPos+58] >> 2) & 3;
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}
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break;
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// SA: Sample Data
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case 0x4153:
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dwPos = dwMemPos;
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for (i=1; i<=m_nSamples; i++) if ((Ins[i].nLength) && (!Ins[i].pSample) && (smpinfo[i] != 3) && (dwPos < dwMemLength))
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{
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MODINSTRUMENT *pins = &Ins[i];
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UINT flags = (pins->uFlags & CHN_16BIT) ? RS_PCM16S : RS_PCM8S;
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if (!smpinfo[i])
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{
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dwPos += ReadSample(pins, flags, (LPSTR)(lpStream+dwPos), dwMemLength - dwPos);
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} else
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{
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DWORD dwLen = *((DWORD *)(lpStream+dwPos));
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dwPos += 4;
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if ((dwPos+dwLen <= dwMemLength) && (dwLen > 4))
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{
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flags = (pins->uFlags & CHN_16BIT) ? RS_MDL16 : RS_MDL8;
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ReadSample(pins, flags, (LPSTR)(lpStream+dwPos), dwLen);
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}
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dwPos += dwLen;
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}
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}
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break;
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}
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dwMemPos += blocklen;
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}
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// Unpack Patterns
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if ((dwTrackPos) && (npatterns) && (m_nChannels) && (ntracks))
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{
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for (UINT ipat=0; ipat<npatterns; ipat++)
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{
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if ((Patterns[ipat] = AllocatePattern(PatternSize[ipat], m_nChannels)) == NULL) break;
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for (UINT chn=0; chn<m_nChannels; chn++) if ((patterntracks[ipat*32+chn]) && (patterntracks[ipat*32+chn] <= ntracks))
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{
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MODCOMMAND *m = Patterns[ipat] + chn;
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UnpackMDLTrack(m, m_nChannels, PatternSize[ipat], patterntracks[ipat*32+chn], lpStream+dwTrackPos);
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}
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}
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}
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// Set up envelopes
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for (UINT iIns=1; iIns<=m_nInstruments; iIns++) if (Headers[iIns])
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{
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INSTRUMENTHEADER *penv = Headers[iIns];
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// Setup volume envelope
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if ((nvolenv) && (pvolenv) && (insvolenv[iIns]))
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{
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LPCBYTE pve = pvolenv;
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for (UINT nve=0; nve<nvolenv; nve++, pve+=33) if (pve[0]+1 == insvolenv[iIns])
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{
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WORD vtick = 1;
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penv->nVolEnv = 15;
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for (UINT iv=0; iv<15; iv++)
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{
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if (iv) vtick += pve[iv*2+1];
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penv->VolPoints[iv] = vtick;
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penv->VolEnv[iv] = pve[iv*2+2];
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if (!pve[iv*2+1])
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{
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penv->nVolEnv = iv+1;
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break;
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}
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}
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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;
|
|
}
|
|
|
|
|