initial commit of modplugin

1 files changed, 167 insertions, 0 deletions

diff --git a/core/multimedia/opieplayer/modplug/load_mtm.cpp b/core/multimedia/opieplayer/modplug/load_mtm.cpp
new file mode 100644
index 0000000..7d40b1d
--- a/dev/null
+++ b/core/multimedia/opieplayer/modplug/load_mtm.cpp
@@ -0,0 +1,167 @@
+/*
+ * This program is  free software; you can redistribute it  and modify it
+ * under the terms of the GNU  General Public License as published by the
+ * Free Software Foundation; either version 2  of the license or (at your
+ * option) any later version.
+ *
+ * Authors: Olivier Lapicque <olivierl@jps.net>
+*/
+
+#include "stdafx.h"
+#include "sndfile.h"
+
+//#pragma warning(disable:4244)
+
+//////////////////////////////////////////////////////////
+// MTM file support (import only)
+
+#pragma pack(1)
+
+
+typedef struct tagMTMSAMPLE
+{
+        char samplename[22];      // changed from CHAR
+	DWORD length;
+	DWORD reppos;
+	DWORD repend;
+	CHAR finetune;
+	BYTE volume;
+	BYTE attribute;
+} Q_PACKED MTMSAMPLE;
+
+
+typedef struct tagMTMHEADER
+{
+	char id[4];	        // MTM file marker + version // changed from CHAR
+	char songname[20];	// ASCIIZ songname  // changed from CHAR
+	WORD numtracks;		// number of tracks saved
+	BYTE lastpattern;	// last pattern number saved
+	BYTE lastorder;		// last order number to play (songlength-1)
+	WORD commentsize;	// length of comment field
+	BYTE numsamples;	// number of samples saved
+	BYTE attribute;		// attribute byte (unused)
+	BYTE beatspertrack;
+	BYTE numchannels;	// number of channels used
+	BYTE panpos[32];	// voice pan positions
+} Q_PACKED MTMHEADER;
+
+
+#pragma pack()
+
+
+BOOL CSoundFile::ReadMTM(LPCBYTE lpStream, DWORD dwMemLength)
+//-----------------------------------------------------------
+{
+	MTMHEADER *pmh = (MTMHEADER *)lpStream;
+	DWORD dwMemPos = 66;
+
+	if ((!lpStream) || (dwMemLength < 0x100)) return FALSE;
+	if ((strncmp(pmh->id, "MTM", 3)) || (pmh->numchannels > 32)
+	 || (pmh->numsamples >= MAX_SAMPLES) || (!pmh->numsamples)
+	 || (!pmh->numtracks) || (!pmh->numchannels)
+	 || (!pmh->lastpattern) || (pmh->lastpattern > MAX_PATTERNS)) return FALSE;
+	strncpy(m_szNames[0], pmh->songname, 20);
+	m_szNames[0][20] = 0;
+	if (dwMemPos + 37*pmh->numsamples + 128 + 192*pmh->numtracks
+	 + 64 * (pmh->lastpattern+1) + pmh->commentsize >= dwMemLength) return FALSE;
+	m_nType = MOD_TYPE_MTM;
+	m_nSamples = pmh->numsamples;
+	m_nChannels = pmh->numchannels;
+	// Reading instruments
+	for	(UINT i=1; i<=m_nSamples; i++)
+	{
+		MTMSAMPLE *pms = (MTMSAMPLE *)(lpStream + dwMemPos);
+		strncpy(m_szNames[i], pms->samplename, 22);
+		m_szNames[i][22] = 0;
+		Ins[i].nVolume = pms->volume << 2;
+		Ins[i].nGlobalVol = 64;
+		DWORD len = pms->length;
+		if ((len > 4) && (len <= MAX_SAMPLE_LENGTH))
+		{
+			Ins[i].nLength = len;
+			Ins[i].nLoopStart = pms->reppos;
+			Ins[i].nLoopEnd = pms->repend;
+			if (Ins[i].nLoopEnd > Ins[i].nLength) Ins[i].nLoopEnd = Ins[i].nLength;
+			if (Ins[i].nLoopStart + 4 >= Ins[i].nLoopEnd) Ins[i].nLoopStart = Ins[i].nLoopEnd = 0;
+			if (Ins[i].nLoopEnd) Ins[i].uFlags |= CHN_LOOP;
+			Ins[i].nFineTune = MOD2XMFineTune(pms->finetune);
+			if (pms->attribute & 0x01)
+			{
+				Ins[i].uFlags |= CHN_16BIT;
+				Ins[i].nLength >>= 1;
+				Ins[i].nLoopStart >>= 1;
+				Ins[i].nLoopEnd >>= 1;
+			}
+			Ins[i].nPan = 128;
+		}
+		dwMemPos += 37;
+	}
+	// Setting Channel Pan Position
+	for (UINT ich=0; ich<m_nChannels; ich++)
+	{
+		ChnSettings[ich].nPan = ((pmh->panpos[ich] & 0x0F) << 4) + 8;
+		ChnSettings[ich].nVolume = 64;
+	}
+	// Reading pattern order
+	memcpy(Order, lpStream + dwMemPos, pmh->lastorder+1);
+	dwMemPos += 128;
+	// Reading Patterns
+	LPCBYTE pTracks = lpStream + dwMemPos;
+	dwMemPos += 192 * pmh->numtracks;
+	LPWORD pSeq = (LPWORD)(lpStream + dwMemPos);
+	for (UINT pat=0; pat<=pmh->lastpattern; pat++)
+	{
+		PatternSize[pat] = 64;
+		if ((Patterns[pat] = AllocatePattern(64, m_nChannels)) == NULL) break;
+		for (UINT n=0; n<32; n++) if ((pSeq[n]) && (pSeq[n] <= pmh->numtracks) && (n < m_nChannels))
+		{
+			LPCBYTE p = pTracks + 192 * (pSeq[n]-1);
+			MODCOMMAND *m = Patterns[pat] + n;
+			for (UINT i=0; i<64; i++, m+=m_nChannels, p+=3)
+			{
+				if (p[0] & 0xFC) m->note = (p[0] >> 2) + 37;
+				m->instr = ((p[0] & 0x03) << 4) | (p[1] >> 4);
+				UINT cmd = p[1] & 0x0F;
+				UINT param = p[2];
+				if (cmd == 0x0A)
+				{
+					if (param & 0xF0) param &= 0xF0; else param &= 0x0F;
+				}
+				m->command = cmd;
+				m->param = param;
+				if ((cmd) || (param)) ConvertModCommand(m);
+			}
+		}
+		pSeq += 32;
+	}
+	dwMemPos += 64*(pmh->lastpattern+1);
+	if ((pmh->commentsize) && (dwMemPos + pmh->commentsize < dwMemLength))
+	{
+		UINT n = pmh->commentsize;
+		m_lpszSongComments = new char[n+1];
+		if (m_lpszSongComments)
+		{
+			memcpy(m_lpszSongComments, lpStream+dwMemPos, n);
+			m_lpszSongComments[n] = 0;
+			for (UINT i=0; i<n; i++)
+			{
+				if (!m_lpszSongComments[i])
+				{
+					m_lpszSongComments[i] = ((i+1) % 40) ? 0x20 : 0x0D;
+				}
+			}
+		}
+	}
+	dwMemPos += pmh->commentsize;
+	// Reading Samples
+	for (UINT ismp=1; ismp<=m_nSamples; ismp++)
+	{
+		if (dwMemPos >= dwMemLength) break;
+		dwMemPos += ReadSample(&Ins[ismp], (Ins[ismp].uFlags & CHN_16BIT) ? RS_PCM16U : RS_PCM8U,
+								(LPSTR)(lpStream + dwMemPos), dwMemLength - dwMemPos);
+	}
+	m_nMinPeriod = 64;
+	m_nMaxPeriod = 32767;
+	return TRUE;
+}
+