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// -*-C++-*-
// This file is part of the gmod package
// Copyright (C) 1997 by Andrew J. Robinson
#include <stdlib.h>
#include <string.h>
#include <asm/errno.h>
#ifdef USE_LOCAL
#include "soundcard.h"
#else
#include <sys/soundcard.h>
#endif
#include "Sample.h"
#include "Sequencer.h"
int
Sequencer::patchLoad(FILE * modFd, int sampleNum, Sample &samp,
int &bytesRead, int cutFactor) const
{
int xBytesRead;
int len;
unsigned short loopFlags;
int loopStart;
int loopEnd;
int i, rc;
struct patch_info tpatch;
struct patch_info *patch;
memset(&tpatch, 0, sizeof(patch_info));
samp.getPatchInfo(tpatch);
patch = (struct patch_info *)malloc(sizeof(struct patch_info) +
tpatch.len + 2);
memcpy(patch, &tpatch, sizeof(struct patch_info));
patch->key = GUS_PATCH;
patch->low_note = 0;
patch->high_note = 0x7fffffff;
patch->volume = 0;
patch->panning = -112;
patch->device_no = gusDev_;
patch->instr_no = sampleNum;
len = patch->len;
/* fix loopEnd if necessary */
if (patch->loop_end > len)
patch->loop_end = len;
loopStart = patch->loop_start;
loopEnd = patch->loop_end;
if (loopStart >= loopEnd)
patch->mode &= ~WAVE_LOOPING;
loopFlags = patch->mode;
if ((bytesRead = fread(patch->data, 1, len, modFd)) != len)
{
if (((loopFlags & WAVE_16_BITS) && (bytesRead > 1)) ||
(!(loopFlags & WAVE_16_BITS) && (bytesRead > 0)))
{
/* Warning: Short sample */
xBytesRead = bytesRead;
if ((loopFlags & WAVE_16_BITS) && ((bytesRead % 2) != 0))
xBytesRead--;
i = xBytesRead - (len - bytesRead);
if (i < 0)
i = 0;
if ((loopFlags & WAVE_16_BITS) && ((i % 2) != 0))
i--;
memcpy(patch->data + xBytesRead, patch->data + i, len - xBytesRead);
}
else
{
free(patch);
return -ENODATA;
}
}
/* "decode" sample if necessary */
samp.decode(patch->data);
/* convert 16 bits to 8 if necessary */
if ((loopFlags & WAVE_16_BITS) && ((len > 256*1024) || (cutFactor > 1)))
{
for (i = 0; i < len - 1; i+= 2)
patch->data[i / 2] = patch->data[i + 1];
len = (patch->len /= 2);
loopStart = (patch->loop_start /= 2);
loopEnd = (patch->loop_end /= 2);
loopFlags &= ~WAVE_16_BITS;
patch->base_freq /= 2;
}
/* extend looped samples, since length might equal loop end */
if (loopFlags & WAVE_LOOPING)
{
if (loopFlags & WAVE_16_BITS)
{
if (len >= 2)
{
patch->data[len] = patch->data[len - 2];
patch->data[len + 1] = patch->data[len - 1];
len += 2;
patch->len += 2;
}
}
else if (len >= 1)
{
patch->data[len] = patch->data[len - 1];
len++;
(patch->len)++;
}
}
/* Shorten samples to fit in memory. Do not shorten a looped sample if */
/* the start and end are not evenly divisible by cutFactor; otherwise, */
/* the sample may go out of tune. */
if ((cutFactor == 2) && (loopFlags & WAVE_LOOPING) && (loopStart % 2) &&
(loopEnd % 2))
{
loopStart = (patch->loop_start -= 1);
loopEnd = (patch->loop_end -= 1);
i = 2;
}
else
i = 1;
if ((cutFactor > 1) && !((loopFlags & WAVE_LOOPING) &&
((loopStart % cutFactor) ||
(loopEnd % cutFactor))))
{
samp.cutFactor(i * cutFactor);
for (i = 0; i < len / cutFactor; i++)
patch->data[i] = patch->data[i * cutFactor];
len = (patch->len /= cutFactor);
loopStart = (patch->loop_start /= cutFactor);
loopEnd = (patch->loop_end /= cutFactor);
patch->base_freq /= cutFactor;
}
else
samp.cutFactor(i);
/* try to remove loop clicking */
if ((loopFlags & WAVE_LOOPING) && (loopEnd >= 2) &&
!(loopFlags & WAVE_16_BITS))
{
patch->data[loopEnd] = patch->data[loopStart];
if (loopFlags & WAVE_UNSIGNED)
patch->data[loopEnd - 1] =
((unsigned char)(patch->data[loopEnd - 2]) +
(unsigned char)(patch->data[loopEnd])) / 2;
else
patch->data[loopEnd - 1] =
((signed char)(patch->data[loopEnd - 2]) +
(signed char)(patch->data[loopEnd])) / 2;
}
if (memory() < len)
rc = -ENOSPC;
else
{
#define write ::write
#define seqfd seqfd_
rc = SEQ_WRPATCH2(patch, sizeof(struct patch_info) + len);
#undef write
}
free(patch);
return rc;
}
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