mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-28 12:41:05 +00:00
220 lines
6.5 KiB
C++
220 lines
6.5 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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#include "stdafx.h"
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#include "sndfile.h"
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#ifndef WAVE_FORMAT_EXTENSIBLE
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#define WAVE_FORMAT_EXTENSIBLE 0xFFFE
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#endif
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/////////////////////////////////////////////////////////////
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// WAV file support
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BOOL CSoundFile::ReadWav(const BYTE *lpStream, DWORD dwMemLength)
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//---------------------------------------------------------------
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{
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DWORD dwMemPos = 0;
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WAVEFILEHEADER *phdr = (WAVEFILEHEADER *)lpStream;
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WAVEFORMATHEADER *pfmt = (WAVEFORMATHEADER *)(lpStream + sizeof(WAVEFILEHEADER));
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if ((!lpStream) || (dwMemLength < (DWORD)sizeof(WAVEFILEHEADER))) return FALSE;
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if ((phdr->id_RIFF != IFFID_RIFF) || (phdr->id_WAVE != IFFID_WAVE)
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|| (pfmt->id_fmt != IFFID_fmt)) return FALSE;
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dwMemPos = sizeof(WAVEFILEHEADER) + 8 + pfmt->hdrlen;
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if ((dwMemPos + 8 >= dwMemLength)
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|| ((pfmt->format != WAVE_FORMAT_PCM) && (pfmt->format != WAVE_FORMAT_EXTENSIBLE))
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|| (pfmt->channels > 4)
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|| (!pfmt->channels)
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|| (!pfmt->freqHz)
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|| (pfmt->bitspersample & 7)
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|| (pfmt->bitspersample < 8)
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|| (pfmt->bitspersample > 32)) return FALSE;
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WAVEDATAHEADER *pdata;
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for (;;)
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{
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pdata = (WAVEDATAHEADER *)(lpStream + dwMemPos);
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if (pdata->id_data == IFFID_data) break;
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dwMemPos += pdata->length + 8;
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if (dwMemPos + 8 >= dwMemLength) return FALSE;
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}
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m_nType = MOD_TYPE_WAV;
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m_nSamples = 0;
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m_nInstruments = 0;
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m_nChannels = 4;
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m_nDefaultSpeed = 8;
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m_nDefaultTempo = 125;
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m_dwSongFlags |= SONG_LINEARSLIDES; // For no resampling
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Order[0] = 0;
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Order[1] = 0xFF;
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PatternSize[0] = PatternSize[1] = 64;
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if ((Patterns[0] = AllocatePattern(64, 4)) == NULL) return TRUE;
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if ((Patterns[1] = AllocatePattern(64, 4)) == NULL) return TRUE;
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UINT samplesize = (pfmt->channels * pfmt->bitspersample) >> 3;
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UINT len = pdata->length, bytelen;
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if (dwMemPos + len > dwMemLength - 8) len = dwMemLength - dwMemPos - 8;
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len /= samplesize;
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bytelen = len;
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if (pfmt->bitspersample >= 16) bytelen *= 2;
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if (len > MAX_SAMPLE_LENGTH) len = MAX_SAMPLE_LENGTH;
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if (!len) return TRUE;
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// Setting up module length
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DWORD dwTime = ((len * 50) / pfmt->freqHz) + 1;
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DWORD framesperrow = (dwTime + 63) / 63;
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if (framesperrow < 4) framesperrow = 4;
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UINT norders = 1;
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while (framesperrow >= 0x20)
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{
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Order[norders++] = 1;
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Order[norders] = 0xFF;
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framesperrow = (dwTime + (64 * norders - 1)) / (64 * norders);
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if (norders >= MAX_ORDERS-1) break;
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}
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m_nDefaultSpeed = framesperrow;
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for (UINT iChn=0; iChn<4; iChn++)
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{
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ChnSettings[iChn].nPan = (iChn & 1) ? 256 : 0;
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ChnSettings[iChn].nVolume = 64;
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ChnSettings[iChn].dwFlags = 0;
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}
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// Setting up speed command
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MODCOMMAND *pcmd = Patterns[0];
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pcmd[0].command = CMD_SPEED;
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pcmd[0].param = (BYTE)m_nDefaultSpeed;
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pcmd[0].note = 5*12+1;
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pcmd[0].instr = 1;
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pcmd[1].note = pcmd[0].note;
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pcmd[1].instr = pcmd[0].instr;
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m_nSamples = pfmt->channels;
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// Support for Multichannel Wave
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for (UINT nChn=0; nChn<m_nSamples; nChn++)
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{
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MODINSTRUMENT *pins = &Ins[nChn+1];
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pcmd[nChn].note = pcmd[0].note;
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pcmd[nChn].instr = (BYTE)(nChn+1);
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pins->nLength = len;
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pins->nC4Speed = pfmt->freqHz;
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pins->nVolume = 256;
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pins->nPan = 128;
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pins->nGlobalVol = 64;
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pins->uFlags = (WORD)((pfmt->bitspersample >= 16) ? CHN_16BIT : 0);
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pins->uFlags |= CHN_PANNING;
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if (m_nSamples > 1)
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{
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switch(nChn)
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{
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case 0: pins->nPan = 0; break;
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case 1: pins->nPan = 256; break;
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case 2: pins->nPan = (WORD)((m_nSamples == 3) ? 128 : 64); pcmd[nChn].command = CMD_S3MCMDEX; pcmd[nChn].param = 0x91; break;
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case 3: pins->nPan = 192; pcmd[nChn].command = CMD_S3MCMDEX; pcmd[nChn].param = 0x91; break;
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default: pins->nPan = 128; break;
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}
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}
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if ((pins->pSample = AllocateSample(bytelen+8)) == NULL) return TRUE;
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if (pfmt->bitspersample >= 16)
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{
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int slsize = pfmt->bitspersample >> 3;
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signed short *p = (signed short *)pins->pSample;
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signed char *psrc = (signed char *)(lpStream+dwMemPos+8+nChn*slsize+slsize-2);
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for (UINT i=0; i<len; i++)
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{
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p[i] = *((signed short *)psrc);
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psrc += samplesize;
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}
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p[len+1] = p[len] = p[len-1];
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} else
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{
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signed char *p = (signed char *)pins->pSample;
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signed char *psrc = (signed char *)(lpStream+dwMemPos+8+nChn);
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for (UINT i=0; i<len; i++)
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{
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p[i] = (signed char)((*psrc) + 0x80);
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psrc += samplesize;
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}
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p[len+1] = p[len] = p[len-1];
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}
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}
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return TRUE;
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}
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////////////////////////////////////////////////////////////////////////
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// IMA ADPCM Support
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#pragma pack(1)
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typedef struct IMAADPCMBLOCK
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{
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WORD sample;
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BYTE index;
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BYTE Reserved;
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} DVI_ADPCMBLOCKHEADER;
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#pragma pack()
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static const int gIMAUnpackTable[90] =
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{
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7, 8, 9, 10, 11, 12, 13, 14,
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16, 17, 19, 21, 23, 25, 28, 31,
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34, 37, 41, 45, 50, 55, 60, 66,
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73, 80, 88, 97, 107, 118, 130, 143,
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157, 173, 190, 209, 230, 253, 279, 307,
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337, 371, 408, 449, 494, 544, 598, 658,
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724, 796, 876, 963, 1060, 1166, 1282, 1411,
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1552, 1707, 1878, 2066, 2272, 2499, 2749, 3024,
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3327, 3660, 4026, 4428, 4871, 5358, 5894, 6484,
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7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
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15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794,
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32767, 0
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};
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BOOL IMAADPCMUnpack16(signed short *pdest, UINT nLen, LPBYTE psrc, DWORD dwBytes, UINT pkBlkAlign)
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//------------------------------------------------------------------------------------------------
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{
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static const int gIMAIndexTab[8] = { -1, -1, -1, -1, 2, 4, 6, 8 };
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UINT nPos;
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int value;
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if ((nLen < 4) || (!pdest) || (!psrc)
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|| (pkBlkAlign < 5) || (pkBlkAlign > dwBytes)) return FALSE;
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nPos = 0;
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while ((nPos < nLen) && (dwBytes > 4))
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{
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int nIndex;
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value = *((short int *)psrc);
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nIndex = psrc[2];
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psrc += 4;
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dwBytes -= 4;
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pdest[nPos++] = (short int)value;
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for (UINT i=0; ((i<(pkBlkAlign-4)*2) && (nPos < nLen) && (dwBytes)); i++)
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{
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BYTE delta;
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if (i & 1)
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{
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delta = (BYTE)(((*(psrc++)) >> 4) & 0x0F);
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dwBytes--;
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} else
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{
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delta = (BYTE)((*psrc) & 0x0F);
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}
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int v = gIMAUnpackTable[nIndex] >> 3;
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if (delta & 1) v += gIMAUnpackTable[nIndex] >> 2;
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if (delta & 2) v += gIMAUnpackTable[nIndex] >> 1;
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if (delta & 4) v += gIMAUnpackTable[nIndex];
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if (delta & 8) value -= v; else value += v;
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nIndex += gIMAIndexTab[delta & 7];
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if (nIndex < 0) nIndex = 0; else
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if (nIndex > 88) nIndex = 88;
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if (value > 32767) value = 32767; else
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if (value < -32768) value = -32768;
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pdest[nPos++] = (short int)value;
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}
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}
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return TRUE;
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}
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