mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-24 17:20:36 +00:00
220 lines
6.5 KiB
C++
220 lines
6.5 KiB
C++
/*
|
|
* This source code is public domain.
|
|
*
|
|
* Authors: Olivier Lapicque <olivierl@jps.net>
|
|
*/
|
|
|
|
#include "stdafx.h"
|
|
#include "sndfile.h"
|
|
|
|
#ifndef WAVE_FORMAT_EXTENSIBLE
|
|
#define WAVE_FORMAT_EXTENSIBLE 0xFFFE
|
|
#endif
|
|
|
|
/////////////////////////////////////////////////////////////
|
|
// WAV file support
|
|
|
|
BOOL CSoundFile::ReadWav(const BYTE *lpStream, DWORD dwMemLength)
|
|
//---------------------------------------------------------------
|
|
{
|
|
DWORD dwMemPos = 0;
|
|
WAVEFILEHEADER *phdr = (WAVEFILEHEADER *)lpStream;
|
|
WAVEFORMATHEADER *pfmt = (WAVEFORMATHEADER *)(lpStream + sizeof(WAVEFILEHEADER));
|
|
if ((!lpStream) || (dwMemLength < (DWORD)sizeof(WAVEFILEHEADER))) return FALSE;
|
|
if ((phdr->id_RIFF != IFFID_RIFF) || (phdr->id_WAVE != IFFID_WAVE)
|
|
|| (pfmt->id_fmt != IFFID_fmt)) return FALSE;
|
|
dwMemPos = sizeof(WAVEFILEHEADER) + 8 + pfmt->hdrlen;
|
|
if ((dwMemPos + 8 >= dwMemLength)
|
|
|| ((pfmt->format != WAVE_FORMAT_PCM) && (pfmt->format != WAVE_FORMAT_EXTENSIBLE))
|
|
|| (pfmt->channels > 4)
|
|
|| (!pfmt->channels)
|
|
|| (!pfmt->freqHz)
|
|
|| (pfmt->bitspersample & 7)
|
|
|| (pfmt->bitspersample < 8)
|
|
|| (pfmt->bitspersample > 32)) return FALSE;
|
|
WAVEDATAHEADER *pdata;
|
|
for (;;)
|
|
{
|
|
pdata = (WAVEDATAHEADER *)(lpStream + dwMemPos);
|
|
if (pdata->id_data == IFFID_data) break;
|
|
dwMemPos += pdata->length + 8;
|
|
if (dwMemPos + 8 >= dwMemLength) return FALSE;
|
|
}
|
|
m_nType = MOD_TYPE_WAV;
|
|
m_nSamples = 0;
|
|
m_nInstruments = 0;
|
|
m_nChannels = 4;
|
|
m_nDefaultSpeed = 8;
|
|
m_nDefaultTempo = 125;
|
|
m_dwSongFlags |= SONG_LINEARSLIDES; // For no resampling
|
|
Order[0] = 0;
|
|
Order[1] = 0xFF;
|
|
PatternSize[0] = PatternSize[1] = 64;
|
|
if ((Patterns[0] = AllocatePattern(64, 4)) == NULL) return TRUE;
|
|
if ((Patterns[1] = AllocatePattern(64, 4)) == NULL) return TRUE;
|
|
UINT samplesize = (pfmt->channels * pfmt->bitspersample) >> 3;
|
|
UINT len = pdata->length, bytelen;
|
|
if (dwMemPos + len > dwMemLength - 8) len = dwMemLength - dwMemPos - 8;
|
|
len /= samplesize;
|
|
bytelen = len;
|
|
if (pfmt->bitspersample >= 16) bytelen *= 2;
|
|
if (len > MAX_SAMPLE_LENGTH) len = MAX_SAMPLE_LENGTH;
|
|
if (!len) return TRUE;
|
|
// Setting up module length
|
|
DWORD dwTime = ((len * 50) / pfmt->freqHz) + 1;
|
|
DWORD framesperrow = (dwTime + 63) / 63;
|
|
if (framesperrow < 4) framesperrow = 4;
|
|
UINT norders = 1;
|
|
while (framesperrow >= 0x20)
|
|
{
|
|
Order[norders++] = 1;
|
|
Order[norders] = 0xFF;
|
|
framesperrow = (dwTime + (64 * norders - 1)) / (64 * norders);
|
|
if (norders >= MAX_ORDERS-1) break;
|
|
}
|
|
m_nDefaultSpeed = framesperrow;
|
|
for (UINT iChn=0; iChn<4; iChn++)
|
|
{
|
|
ChnSettings[iChn].nPan = (iChn & 1) ? 256 : 0;
|
|
ChnSettings[iChn].nVolume = 64;
|
|
ChnSettings[iChn].dwFlags = 0;
|
|
}
|
|
// Setting up speed command
|
|
MODCOMMAND *pcmd = Patterns[0];
|
|
pcmd[0].command = CMD_SPEED;
|
|
pcmd[0].param = (BYTE)m_nDefaultSpeed;
|
|
pcmd[0].note = 5*12+1;
|
|
pcmd[0].instr = 1;
|
|
pcmd[1].note = pcmd[0].note;
|
|
pcmd[1].instr = pcmd[0].instr;
|
|
m_nSamples = pfmt->channels;
|
|
// Support for Multichannel Wave
|
|
for (UINT nChn=0; nChn<m_nSamples; nChn++)
|
|
{
|
|
MODINSTRUMENT *pins = &Ins[nChn+1];
|
|
pcmd[nChn].note = pcmd[0].note;
|
|
pcmd[nChn].instr = (BYTE)(nChn+1);
|
|
pins->nLength = len;
|
|
pins->nC4Speed = pfmt->freqHz;
|
|
pins->nVolume = 256;
|
|
pins->nPan = 128;
|
|
pins->nGlobalVol = 64;
|
|
pins->uFlags = (WORD)((pfmt->bitspersample >= 16) ? CHN_16BIT : 0);
|
|
pins->uFlags |= CHN_PANNING;
|
|
if (m_nSamples > 1)
|
|
{
|
|
switch(nChn)
|
|
{
|
|
case 0: pins->nPan = 0; break;
|
|
case 1: pins->nPan = 256; break;
|
|
case 2: pins->nPan = (WORD)((m_nSamples == 3) ? 128 : 64); pcmd[nChn].command = CMD_S3MCMDEX; pcmd[nChn].param = 0x91; break;
|
|
case 3: pins->nPan = 192; pcmd[nChn].command = CMD_S3MCMDEX; pcmd[nChn].param = 0x91; break;
|
|
default: pins->nPan = 128; break;
|
|
}
|
|
}
|
|
if ((pins->pSample = AllocateSample(bytelen+8)) == NULL) return TRUE;
|
|
if (pfmt->bitspersample >= 16)
|
|
{
|
|
int slsize = pfmt->bitspersample >> 3;
|
|
signed short *p = (signed short *)pins->pSample;
|
|
signed char *psrc = (signed char *)(lpStream+dwMemPos+8+nChn*slsize+slsize-2);
|
|
for (UINT i=0; i<len; i++)
|
|
{
|
|
p[i] = *((signed short *)psrc);
|
|
psrc += samplesize;
|
|
}
|
|
p[len+1] = p[len] = p[len-1];
|
|
} else
|
|
{
|
|
signed char *p = (signed char *)pins->pSample;
|
|
signed char *psrc = (signed char *)(lpStream+dwMemPos+8+nChn);
|
|
for (UINT i=0; i<len; i++)
|
|
{
|
|
p[i] = (signed char)((*psrc) + 0x80);
|
|
psrc += samplesize;
|
|
}
|
|
p[len+1] = p[len] = p[len-1];
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
// IMA ADPCM Support
|
|
|
|
#pragma pack(1)
|
|
|
|
typedef struct IMAADPCMBLOCK
|
|
{
|
|
WORD sample;
|
|
BYTE index;
|
|
BYTE Reserved;
|
|
} DVI_ADPCMBLOCKHEADER;
|
|
|
|
#pragma pack()
|
|
|
|
static const int gIMAUnpackTable[90] =
|
|
{
|
|
7, 8, 9, 10, 11, 12, 13, 14,
|
|
16, 17, 19, 21, 23, 25, 28, 31,
|
|
34, 37, 41, 45, 50, 55, 60, 66,
|
|
73, 80, 88, 97, 107, 118, 130, 143,
|
|
157, 173, 190, 209, 230, 253, 279, 307,
|
|
337, 371, 408, 449, 494, 544, 598, 658,
|
|
724, 796, 876, 963, 1060, 1166, 1282, 1411,
|
|
1552, 1707, 1878, 2066, 2272, 2499, 2749, 3024,
|
|
3327, 3660, 4026, 4428, 4871, 5358, 5894, 6484,
|
|
7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
|
|
15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794,
|
|
32767, 0
|
|
};
|
|
|
|
|
|
BOOL IMAADPCMUnpack16(signed short *pdest, UINT nLen, LPBYTE psrc, DWORD dwBytes, UINT pkBlkAlign)
|
|
//------------------------------------------------------------------------------------------------
|
|
{
|
|
static const int gIMAIndexTab[8] = { -1, -1, -1, -1, 2, 4, 6, 8 };
|
|
UINT nPos;
|
|
int value;
|
|
|
|
if ((nLen < 4) || (!pdest) || (!psrc)
|
|
|| (pkBlkAlign < 5) || (pkBlkAlign > dwBytes)) return FALSE;
|
|
nPos = 0;
|
|
while ((nPos < nLen) && (dwBytes > 4))
|
|
{
|
|
int nIndex;
|
|
value = *((short int *)psrc);
|
|
nIndex = psrc[2];
|
|
psrc += 4;
|
|
dwBytes -= 4;
|
|
pdest[nPos++] = (short int)value;
|
|
for (UINT i=0; ((i<(pkBlkAlign-4)*2) && (nPos < nLen) && (dwBytes)); i++)
|
|
{
|
|
BYTE delta;
|
|
if (i & 1)
|
|
{
|
|
delta = (BYTE)(((*(psrc++)) >> 4) & 0x0F);
|
|
dwBytes--;
|
|
} else
|
|
{
|
|
delta = (BYTE)((*psrc) & 0x0F);
|
|
}
|
|
int v = gIMAUnpackTable[nIndex] >> 3;
|
|
if (delta & 1) v += gIMAUnpackTable[nIndex] >> 2;
|
|
if (delta & 2) v += gIMAUnpackTable[nIndex] >> 1;
|
|
if (delta & 4) v += gIMAUnpackTable[nIndex];
|
|
if (delta & 8) value -= v; else value += v;
|
|
nIndex += gIMAIndexTab[delta & 7];
|
|
if (nIndex < 0) nIndex = 0; else
|
|
if (nIndex > 88) nIndex = 88;
|
|
if (value > 32767) value = 32767; else
|
|
if (value < -32768) value = -32768;
|
|
pdest[nPos++] = (short int)value;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
|