mirror of
https://github.com/thestk/stk
synced 2026-01-11 20:11:52 +00:00
104 lines
2.8 KiB
C++
104 lines
2.8 KiB
C++
/*******************************************/
|
|
/* WavWvIn Input Class, */
|
|
/* by Gary P. Scavone, 1999 */
|
|
/* */
|
|
/* This object inherits from WvIn and is */
|
|
/* used to open DOS/Windows .wav 16-bit */
|
|
/* data (signed integer) files for */
|
|
/* playback. */
|
|
/* */
|
|
/* .wav files are always little-endian. */
|
|
/*******************************************/
|
|
|
|
#include "WavWvIn.h"
|
|
|
|
#ifndef __LITTLE_ENDIAN__
|
|
#include "swapstuf.h"
|
|
#endif
|
|
|
|
WavWvIn :: WavWvIn(char *fileName, char *mode)
|
|
{
|
|
// Open the file and get header info
|
|
FILE *fd;
|
|
fd = fopen(fileName,"rb");
|
|
if (!fd) {
|
|
printf("Couldn't open or find .wav file %s !!!\n",fileName);
|
|
exit(0);
|
|
}
|
|
|
|
// Make sure this is a .wav format file
|
|
char wave[4];
|
|
fseek(fd,8,SEEK_SET); // Locate wave id
|
|
fread(&wave,4,1,fd);
|
|
if (strncmp(wave,"WAVE",4)) {
|
|
printf("This doesn't appear to be a .wav file %s !!!\n",fileName);
|
|
exit(0);
|
|
}
|
|
|
|
// Get number of channels from the header
|
|
INT16 temp;
|
|
fseek(fd,22,SEEK_SET); // Locate channels in header
|
|
fread(&temp,2,1,fd);
|
|
#ifndef __LITTLE_ENDIAN__
|
|
temp = SwapINT16(temp);
|
|
#endif
|
|
channels = temp;
|
|
|
|
// Get length of data from the header
|
|
INT32 bytes;
|
|
fseek(fd,40,SEEK_SET); // Locate data length in header
|
|
fread(&bytes,4,1,fd);
|
|
#ifndef __LITTLE_ENDIAN__
|
|
bytes = SwapINT32(bytes);
|
|
#endif
|
|
length = bytes / 2 / channels; // length in 2-byte samples
|
|
data = (MY_FLOAT *) new MY_FLOAT[(length+1)*channels];
|
|
|
|
// Read samples into data[]
|
|
long i = 0;
|
|
while (fread(&temp,2,1,fd)) {
|
|
#ifndef __LITTLE_ENDIAN__
|
|
temp = SwapINT16 (temp);
|
|
#endif
|
|
data[i++] = (MY_FLOAT) temp;
|
|
}
|
|
|
|
// Get file sample rate from the header and set the default rate
|
|
INT32 srate;
|
|
fseek(fd,24,SEEK_SET); // Locate sample rate in header
|
|
fread(&srate,4,1,fd);
|
|
#ifndef __LITTLE_ENDIAN__
|
|
srate = SwapINT32(srate);
|
|
#endif
|
|
rate = (MY_FLOAT) (srate/SRATE); // set default rate based on file sampling rate
|
|
fclose(fd);
|
|
|
|
// Setup for looping or one-shot playback
|
|
if (!strcmp(mode,"looping")) {
|
|
looping = 1;
|
|
for (int j=0; j<channels; j++)
|
|
data[length*channels+j] = data[j]; // extra sample for interpolation
|
|
}
|
|
else if (!strcmp(mode,"oneshot")) {
|
|
looping = 0;
|
|
for (int j=0; j<channels; j++)
|
|
data[length*channels+j] = data[(length-1)*channels+j]; // extra sample for interpolation
|
|
}
|
|
else {
|
|
fprintf(stderr,"ERROR: Unsupported WavWvIn mode: %s\n",mode);
|
|
free(data);
|
|
exit(0);
|
|
}
|
|
|
|
if (fmod(rate, 1.0) > 0.0) interpolate = 1;
|
|
else interpolate = 0;
|
|
time = (MY_FLOAT) 0.0;
|
|
phaseOffset = (MY_FLOAT) 0.0;
|
|
finished = 0;
|
|
lastOutput = (MY_FLOAT *) calloc(channels, sizeof(MY_FLOAT));
|
|
}
|
|
|
|
WavWvIn :: ~WavWvIn()
|
|
{
|
|
}
|