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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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260 lines
6.3 KiB
C++
260 lines
6.3 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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// Farandole (FAR) 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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#define FARFILEMAGIC 0xFE524146 // "FAR"
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#pragma pack(1)
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typedef struct FARHEADER1
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{
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DWORD id; // file magic FAR=
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CHAR songname[40]; // songname
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CHAR magic2[3]; // 13,10,26
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WORD headerlen; // remaining length of header in bytes
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BYTE version; // 0xD1
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BYTE onoff[16];
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BYTE edit1[9];
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BYTE speed;
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BYTE panning[16];
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BYTE edit2[4];
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WORD stlen;
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} FARHEADER1;
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typedef struct FARHEADER2
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{
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BYTE orders[256];
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BYTE numpat;
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BYTE snglen;
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BYTE loopto;
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WORD patsiz[256];
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} FARHEADER2;
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typedef struct FARSAMPLE
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{
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CHAR samplename[32];
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DWORD length;
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BYTE finetune;
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BYTE volume;
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DWORD reppos;
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DWORD repend;
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BYTE type;
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BYTE loop;
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} FARSAMPLE;
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#pragma pack()
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BOOL CSoundFile::ReadFAR(const BYTE *lpStream, DWORD dwMemLength)
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//---------------------------------------------------------------
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{
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FARHEADER1 *pmh1 = (FARHEADER1 *)lpStream;
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FARHEADER2 *pmh2;
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DWORD dwMemPos = sizeof(FARHEADER1);
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UINT headerlen;
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BYTE samplemap[8];
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if ((!lpStream) || (dwMemLength < 1024) || (pmh1->id != FARFILEMAGIC)
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|| (pmh1->magic2[0] != 13) || (pmh1->magic2[1] != 10) || (pmh1->magic2[2] != 26)) return FALSE;
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headerlen = pmh1->headerlen;
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if ((headerlen >= dwMemLength) || (dwMemPos + pmh1->stlen + sizeof(FARHEADER2) >= dwMemLength)) return FALSE;
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// Globals
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m_nType = MOD_TYPE_FAR;
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m_nChannels = 16;
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m_nInstruments = 0;
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m_nSamples = 0;
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m_nSongPreAmp = 0x20;
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m_nDefaultSpeed = pmh1->speed;
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m_nDefaultTempo = 80;
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m_nDefaultGlobalVolume = 256;
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memcpy(m_szNames[0], pmh1->songname, 32);
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// Channel Setting
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for (UINT nchpan=0; nchpan<16; nchpan++)
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{
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ChnSettings[nchpan].dwFlags = 0;
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ChnSettings[nchpan].nPan = ((pmh1->panning[nchpan] & 0x0F) << 4) + 8;
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ChnSettings[nchpan].nVolume = 64;
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}
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// Reading comment
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if (pmh1->stlen)
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{
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UINT szLen = pmh1->stlen;
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if (szLen > dwMemLength - dwMemPos) szLen = dwMemLength - dwMemPos;
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if ((m_lpszSongComments = new char[szLen + 1]) != NULL)
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{
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memcpy(m_lpszSongComments, lpStream+dwMemPos, szLen);
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m_lpszSongComments[szLen] = 0;
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}
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dwMemPos += pmh1->stlen;
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}
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// Reading orders
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pmh2 = (FARHEADER2 *)(lpStream + dwMemPos);
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dwMemPos += sizeof(FARHEADER2);
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if (dwMemPos >= dwMemLength) return TRUE;
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for (UINT iorder=0; iorder<MAX_ORDERS; iorder++)
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{
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Order[iorder] = (iorder <= pmh2->snglen) ? pmh2->orders[iorder] : 0xFF;
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}
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m_nRestartPos = pmh2->loopto;
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// Reading Patterns
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dwMemPos += headerlen - (869 + pmh1->stlen);
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if (dwMemPos >= dwMemLength) return TRUE;
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WORD *patsiz = (WORD *)pmh2->patsiz;
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for (UINT ipat=0; ipat<256; ipat++) if (patsiz[ipat])
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{
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UINT patlen = patsiz[ipat];
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if ((ipat >= MAX_PATTERNS) || (patsiz[ipat] < 2))
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{
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dwMemPos += patlen;
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continue;
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}
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if (dwMemPos + patlen >= dwMemLength) return TRUE;
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UINT rows = (patlen - 2) >> 6;
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if (!rows)
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{
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dwMemPos += patlen;
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continue;
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}
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if (rows > 256) rows = 256;
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if (rows < 16) rows = 16;
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PatternSize[ipat] = rows;
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if ((Patterns[ipat] = AllocatePattern(rows, m_nChannels)) == NULL) return TRUE;
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MODCOMMAND *m = Patterns[ipat];
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UINT patbrk = lpStream[dwMemPos];
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const BYTE *p = lpStream + dwMemPos + 2;
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UINT max = rows*16*4;
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if (max > patlen-2) max = patlen-2;
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for (UINT len=0; len<max; len += 4, m++)
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{
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BYTE note = p[len];
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BYTE ins = p[len+1];
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BYTE vol = p[len+2];
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BYTE eff = p[len+3];
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if (note)
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{
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m->instr = ins + 1;
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m->note = note + 36;
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}
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if (vol & 0x0F)
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{
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m->volcmd = VOLCMD_VOLUME;
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m->vol = (vol & 0x0F) << 2;
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if (m->vol <= 4) m->vol = 0;
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}
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switch(eff & 0xF0)
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{
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// 1.x: Portamento Up
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case 0x10:
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m->command = CMD_PORTAMENTOUP;
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m->param = eff & 0x0F;
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break;
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// 2.x: Portamento Down
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case 0x20:
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m->command = CMD_PORTAMENTODOWN;
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m->param = eff & 0x0F;
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break;
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// 3.x: Tone-Portamento
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case 0x30:
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m->command = CMD_TONEPORTAMENTO;
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m->param = (eff & 0x0F) << 2;
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break;
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// 4.x: Retrigger
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case 0x40:
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m->command = CMD_RETRIG;
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m->param = 6 / (1+(eff&0x0F)) + 1;
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break;
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// 5.x: Set Vibrato Depth
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case 0x50:
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m->command = CMD_VIBRATO;
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m->param = (eff & 0x0F);
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break;
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// 6.x: Set Vibrato Speed
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case 0x60:
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m->command = CMD_VIBRATO;
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m->param = (eff & 0x0F) << 4;
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break;
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// 7.x: Vol Slide Up
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case 0x70:
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m->command = CMD_VOLUMESLIDE;
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m->param = (eff & 0x0F) << 4;
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break;
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// 8.x: Vol Slide Down
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case 0x80:
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m->command = CMD_VOLUMESLIDE;
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m->param = (eff & 0x0F);
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break;
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// A.x: Port to vol
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case 0xA0:
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m->volcmd = VOLCMD_VOLUME;
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m->vol = ((eff & 0x0F) << 2) + 4;
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break;
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// B.x: Set Balance
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case 0xB0:
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m->command = CMD_PANNING8;
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m->param = (eff & 0x0F) << 4;
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break;
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// F.x: Set Speed
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case 0xF0:
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m->command = CMD_SPEED;
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m->param = eff & 0x0F;
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break;
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default:
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if ((patbrk) && (patbrk+1 == (len >> 6)) && (patbrk+1 != rows-1))
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{
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m->command = CMD_PATTERNBREAK;
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patbrk = 0;
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}
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}
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}
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dwMemPos += patlen;
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}
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// Reading samples
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if (dwMemPos + 8 >= dwMemLength) return TRUE;
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memcpy(samplemap, lpStream+dwMemPos, 8);
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dwMemPos += 8;
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MODINSTRUMENT *pins = &Ins[1];
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for (UINT ismp=0; ismp<64; ismp++, pins++) if (samplemap[ismp >> 3] & (1 << (ismp & 7)))
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{
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if (dwMemPos + sizeof(FARSAMPLE) > dwMemLength) return TRUE;
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FARSAMPLE *pfs = (FARSAMPLE *)(lpStream + dwMemPos);
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dwMemPos += sizeof(FARSAMPLE);
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m_nSamples = ismp + 1;
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memcpy(m_szNames[ismp+1], pfs->samplename, 32);
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pins->nLength = pfs->length;
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pins->nLoopStart = pfs->reppos;
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pins->nLoopEnd = pfs->repend;
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pins->nFineTune = 0;
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pins->nC4Speed = 8363*2;
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pins->nGlobalVol = 64;
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pins->nVolume = pfs->volume << 4;
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pins->uFlags = 0;
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if ((pins->nLength > 3) && (dwMemPos + 4 < dwMemLength))
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{
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if (pfs->type & 1)
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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 ((pfs->loop & 8) && (pins->nLoopEnd > 4)) pins->uFlags |= CHN_LOOP;
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ReadSample(pins, (pins->uFlags & CHN_16BIT) ? RS_PCM16S : RS_PCM8S,
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(LPSTR)(lpStream+dwMemPos), dwMemLength - dwMemPos);
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}
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dwMemPos += pfs->length;
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}
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return TRUE;
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}
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