mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-08 18:39:54 +00:00
368 lines
9.8 KiB
C++
368 lines
9.8 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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* Adam Goode <adam@evdebs.org> (endian and char fixes for PPC)
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*/
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///////////////////////////////////////////////////////////////
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//
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// DigiBooster Pro Module Loader (*.dbm)
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//
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// Note: this loader doesn't handle multiple songs
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//
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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 DBM_FILE_MAGIC 0x304d4244
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#define DBM_ID_NAME 0x454d414e
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#define DBM_NAMELEN 0x2c000000
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#define DBM_ID_INFO 0x4f464e49
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#define DBM_INFOLEN 0x0a000000
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#define DBM_ID_SONG 0x474e4f53
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#define DBM_ID_INST 0x54534e49
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#define DBM_ID_VENV 0x564e4556
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#define DBM_ID_PATT 0x54544150
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#define DBM_ID_SMPL 0x4c504d53
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#pragma pack(1)
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typedef struct DBMFILEHEADER
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{
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DWORD dbm_id; // "DBM0" = 0x304d4244
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WORD trkver; // Tracker version: 02.15
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WORD reserved;
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DWORD name_id; // "NAME" = 0x454d414e
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DWORD name_len; // name length: always 44
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CHAR songname[44];
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DWORD info_id; // "INFO" = 0x4f464e49
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DWORD info_len; // 0x0a000000
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WORD instruments;
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WORD samples;
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WORD songs;
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WORD patterns;
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WORD channels;
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DWORD song_id; // "SONG" = 0x474e4f53
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DWORD song_len;
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CHAR songname2[44];
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WORD orders;
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// WORD orderlist[0]; // orderlist[orders] in words
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} DBMFILEHEADER;
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typedef struct DBMINSTRUMENT
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{
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CHAR name[30];
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WORD sampleno;
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WORD volume;
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DWORD finetune;
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DWORD loopstart;
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DWORD looplen;
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WORD panning;
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WORD flags;
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} DBMINSTRUMENT;
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typedef struct DBMENVELOPE
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{
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WORD instrument;
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BYTE flags;
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BYTE numpoints;
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BYTE sustain1;
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BYTE loopbegin;
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BYTE loopend;
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BYTE sustain2;
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WORD volenv[2*32];
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} DBMENVELOPE;
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typedef struct DBMPATTERN
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{
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WORD rows;
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DWORD packedsize;
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BYTE patterndata[2]; // [packedsize]
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} DBMPATTERN;
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typedef struct DBMSAMPLE
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{
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DWORD flags;
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DWORD samplesize;
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BYTE sampledata[2]; // [samplesize]
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} DBMSAMPLE;
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#pragma pack()
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BOOL CSoundFile::ReadDBM(const BYTE *lpStream, DWORD dwMemLength)
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//---------------------------------------------------------------
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{
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DBMFILEHEADER *pfh = (DBMFILEHEADER *)lpStream;
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DWORD dwMemPos;
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UINT nOrders, nSamples, nInstruments, nPatterns;
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if ((!lpStream) || (dwMemLength <= sizeof(DBMFILEHEADER)) || (!pfh->channels)
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|| (pfh->dbm_id != DBM_FILE_MAGIC) || (!pfh->songs) || (pfh->song_id != DBM_ID_SONG)
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|| (pfh->name_id != DBM_ID_NAME) || (pfh->name_len != DBM_NAMELEN)
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|| (pfh->info_id != DBM_ID_INFO) || (pfh->info_len != DBM_INFOLEN)) return FALSE;
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dwMemPos = sizeof(DBMFILEHEADER);
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nOrders = bswapBE16(pfh->orders);
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if (dwMemPos + 2 * nOrders + 8*3 >= dwMemLength) return FALSE;
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nInstruments = bswapBE16(pfh->instruments);
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nSamples = bswapBE16(pfh->samples);
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nPatterns = bswapBE16(pfh->patterns);
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m_nType = MOD_TYPE_DBM;
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m_nChannels = bswapBE16(pfh->channels);
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if (m_nChannels < 4) m_nChannels = 4;
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if (m_nChannels > 64) m_nChannels = 64;
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memcpy(m_szNames[0], (pfh->songname[0]) ? pfh->songname : pfh->songname2, 32);
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m_szNames[0][31] = 0;
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for (UINT iOrd=0; iOrd < nOrders; iOrd++)
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{
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Order[iOrd] = lpStream[dwMemPos+iOrd*2+1];
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if (iOrd >= MAX_ORDERS-2) break;
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}
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dwMemPos += 2*nOrders;
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while (dwMemPos + 10 < dwMemLength)
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{
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DWORD chunk_id = ((LPDWORD)(lpStream+dwMemPos))[0];
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DWORD chunk_size = bswapBE32(((LPDWORD)(lpStream+dwMemPos))[1]);
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DWORD chunk_pos;
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dwMemPos += 8;
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chunk_pos = dwMemPos;
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if ((dwMemPos + chunk_size > dwMemLength) || (chunk_size > dwMemLength)) break;
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dwMemPos += chunk_size;
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// Instruments
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if (chunk_id == DBM_ID_INST)
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{
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if (nInstruments >= MAX_INSTRUMENTS) nInstruments = MAX_INSTRUMENTS-1;
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for (UINT iIns=0; iIns<nInstruments; iIns++)
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{
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MODINSTRUMENT *psmp;
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INSTRUMENTHEADER *penv;
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DBMINSTRUMENT *pih;
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UINT nsmp;
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if (chunk_pos + sizeof(DBMINSTRUMENT) > dwMemPos) break;
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if ((penv = new INSTRUMENTHEADER) == NULL) break;
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pih = (DBMINSTRUMENT *)(lpStream+chunk_pos);
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nsmp = bswapBE16(pih->sampleno);
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psmp = ((nsmp) && (nsmp < MAX_SAMPLES)) ? &Ins[nsmp] : NULL;
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memset(penv, 0, sizeof(INSTRUMENTHEADER));
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memcpy(penv->name, pih->name, 30);
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if (psmp)
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{
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memcpy(m_szNames[nsmp], pih->name, 30);
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m_szNames[nsmp][30] = 0;
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}
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Headers[iIns+1] = penv;
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penv->nFadeOut = 1024; // ???
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penv->nGlobalVol = 64;
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penv->nPan = bswapBE16(pih->panning);
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if ((penv->nPan) && (penv->nPan < 256))
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penv->dwFlags = ENV_SETPANNING;
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else
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penv->nPan = 128;
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penv->nPPC = 5*12;
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for (UINT i=0; i<120; i++)
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{
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penv->Keyboard[i] = nsmp;
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penv->NoteMap[i] = i+1;
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}
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// Sample Info
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if (psmp)
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{
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DWORD sflags = bswapBE16(pih->flags);
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psmp->nVolume = bswapBE16(pih->volume) * 4;
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if ((!psmp->nVolume) || (psmp->nVolume > 256)) psmp->nVolume = 256;
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psmp->nGlobalVol = 64;
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psmp->nC4Speed = bswapBE32(pih->finetune);
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int f2t = FrequencyToTranspose(psmp->nC4Speed);
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psmp->RelativeTone = f2t >> 7;
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psmp->nFineTune = f2t & 0x7F;
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if ((pih->looplen) && (sflags & 3))
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{
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psmp->nLoopStart = bswapBE32(pih->loopstart);
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psmp->nLoopEnd = psmp->nLoopStart + bswapBE32(pih->looplen);
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psmp->uFlags |= CHN_LOOP;
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psmp->uFlags &= ~CHN_PINGPONGLOOP;
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if (sflags & 2) psmp->uFlags |= CHN_PINGPONGLOOP;
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}
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}
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chunk_pos += sizeof(DBMINSTRUMENT);
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m_nInstruments = iIns+1;
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}
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} else
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// Volume Envelopes
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if (chunk_id == DBM_ID_VENV)
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{
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UINT nEnvelopes = lpStream[chunk_pos+1];
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chunk_pos += 2;
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for (UINT iEnv=0; iEnv<nEnvelopes; iEnv++)
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{
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DBMENVELOPE *peh;
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UINT nins;
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if (chunk_pos + sizeof(DBMENVELOPE) > dwMemPos) break;
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peh = (DBMENVELOPE *)(lpStream+chunk_pos);
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nins = bswapBE16(peh->instrument);
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if ((nins) && (nins < MAX_INSTRUMENTS) && (Headers[nins]) && (peh->numpoints))
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{
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INSTRUMENTHEADER *penv = Headers[nins];
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if (peh->flags & 1) penv->dwFlags |= ENV_VOLUME;
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if (peh->flags & 2) penv->dwFlags |= ENV_VOLSUSTAIN;
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if (peh->flags & 4) penv->dwFlags |= ENV_VOLLOOP;
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penv->nVolEnv = peh->numpoints + 1;
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if (penv->nVolEnv > MAX_ENVPOINTS) penv->nVolEnv = MAX_ENVPOINTS;
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penv->nVolLoopStart = peh->loopbegin;
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penv->nVolLoopEnd = peh->loopend;
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penv->nVolSustainBegin = penv->nVolSustainEnd = peh->sustain1;
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for (UINT i=0; i<penv->nVolEnv; i++)
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{
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penv->VolPoints[i] = bswapBE16(peh->volenv[i*2]);
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penv->VolEnv[i] = (BYTE)bswapBE16(peh->volenv[i*2+1]);
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}
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}
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chunk_pos += sizeof(DBMENVELOPE);
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}
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} else
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// Packed Pattern Data
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if (chunk_id == DBM_ID_PATT)
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{
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if (nPatterns > MAX_PATTERNS) nPatterns = MAX_PATTERNS;
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for (UINT iPat=0; iPat<nPatterns; iPat++)
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{
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DBMPATTERN *pph;
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DWORD pksize;
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UINT nRows;
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if (chunk_pos + sizeof(DBMPATTERN) > dwMemPos) break;
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pph = (DBMPATTERN *)(lpStream+chunk_pos);
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pksize = bswapBE32(pph->packedsize);
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if ((chunk_pos + pksize + 6 > dwMemPos) || (pksize > dwMemPos)) break;
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nRows = bswapBE16(pph->rows);
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if ((nRows >= 4) && (nRows <= 256))
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{
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MODCOMMAND *m = AllocatePattern(nRows, m_nChannels);
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if (m)
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{
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LPBYTE pkdata = (LPBYTE)&pph->patterndata;
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UINT row = 0;
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UINT i = 0;
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PatternSize[iPat] = nRows;
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Patterns[iPat] = m;
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while ((i+3<pksize) && (row < nRows))
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{
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UINT ch = pkdata[i++];
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if (ch)
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{
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BYTE b = pkdata[i++];
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ch--;
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if (ch < m_nChannels)
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{
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if (b & 0x01)
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{
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UINT note = pkdata[i++];
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if (note == 0x1F) note = 0xFF; else
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if ((note) && (note < 0xFE))
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{
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note = ((note >> 4)*12) + (note & 0x0F) + 13;
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}
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m[ch].note = note;
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}
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if (b & 0x02) m[ch].instr = pkdata[i++];
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if (b & 0x3C)
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{
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UINT cmd1 = 0xFF, param1 = 0, cmd2 = 0xFF, param2 = 0;
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if (b & 0x04) cmd1 = (UINT)pkdata[i++];
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if (b & 0x08) param1 = pkdata[i++];
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if (b & 0x10) cmd2 = (UINT)pkdata[i++];
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if (b & 0x20) param2 = pkdata[i++];
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if (cmd1 == 0x0C)
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{
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m[ch].volcmd = VOLCMD_VOLUME;
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m[ch].vol = param1;
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cmd1 = 0xFF;
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} else
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if (cmd2 == 0x0C)
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{
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m[ch].volcmd = VOLCMD_VOLUME;
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m[ch].vol = param2;
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cmd2 = 0xFF;
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}
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if ((cmd1 > 0x13) || ((cmd1 >= 0x10) && (cmd2 < 0x10)))
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{
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cmd1 = cmd2;
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param1 = param2;
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cmd2 = 0xFF;
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}
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if (cmd1 <= 0x13)
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{
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m[ch].command = cmd1;
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m[ch].param = param1;
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ConvertModCommand(&m[ch]);
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}
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}
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} else
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{
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if (b & 0x01) i++;
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if (b & 0x02) i++;
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if (b & 0x04) i++;
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if (b & 0x08) i++;
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if (b & 0x10) i++;
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if (b & 0x20) i++;
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}
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} else
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{
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row++;
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m += m_nChannels;
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}
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}
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}
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}
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chunk_pos += 6 + pksize;
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}
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} else
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// Reading Sample Data
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if (chunk_id == DBM_ID_SMPL)
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{
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if (nSamples >= MAX_SAMPLES) nSamples = MAX_SAMPLES-1;
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m_nSamples = nSamples;
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for (UINT iSmp=1; iSmp<=nSamples; iSmp++)
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{
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MODINSTRUMENT *pins;
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DBMSAMPLE *psh;
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DWORD samplesize;
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DWORD sampleflags;
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if (chunk_pos + sizeof(DBMSAMPLE) >= dwMemPos) break;
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psh = (DBMSAMPLE *)(lpStream+chunk_pos);
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chunk_pos += 8;
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samplesize = bswapBE32(psh->samplesize);
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sampleflags = bswapBE32(psh->flags);
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pins = &Ins[iSmp];
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pins->nLength = samplesize;
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if (sampleflags & 2)
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{
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pins->uFlags |= CHN_16BIT;
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samplesize <<= 1;
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}
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if ((chunk_pos+samplesize > dwMemPos) || (samplesize > dwMemLength)) break;
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if (sampleflags & 3)
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{
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ReadSample(pins, (pins->uFlags & CHN_16BIT) ? RS_PCM16M : RS_PCM8S,
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(LPSTR)(psh->sampledata), samplesize);
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}
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chunk_pos += samplesize;
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}
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}
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}
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return TRUE;
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}
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