mirror of
https://github.com/thestk/stk
synced 2026-01-11 20:11:52 +00:00
120 lines
2.4 KiB
C++
120 lines
2.4 KiB
C++
/*******************************************/
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/* NonInterpolating One-Shot Raw Sound- */
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/* file Class, by Perry R. Cook, 1995-96 */
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/* This Object can open a raw 16bit data */
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/* (signed integers) file, and play back */
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/* the data once (again when reset), with */
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/* no interpolation on playback. */
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/*******************************************/
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#include "NIWave1S.h"
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NIWave1S :: NIWave1S(char *fileName)
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{
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long i;
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short temp;
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FILE *fd;
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fd = fopen(fileName,"rb");
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if (!fd) {
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printf("Couldn't find soundfile %s !!!!!!!!\n",fileName);
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exit(0);
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}
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i = 0;
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while (fread(&temp,2,1,fd)) i++;
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length = i;
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fseek(fd,0,0);
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data = (MY_FLOAT *) malloc(MY_FLOAT_SIZE * (length + 1));
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i = 0;
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while (fread(&temp,2,1,fd)) {
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data[i] = temp;
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i++;
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}
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data[length] = data[length-1];
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fclose(fd);
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time = 0.0;
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rate = 1.0;
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}
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void NIWave1S :: reset()
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{
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time = 0.0;
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lastOutput = 0.0;
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}
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void NIWave1S :: normalize()
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{
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this->normalize(1.0);
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}
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void NIWave1S :: normalize(MY_FLOAT newPeak)
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{
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long i;
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MY_FLOAT max = 0.0;
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for (i=0;i<=length;i++)
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if (fabs(data[i]) > max)
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max = fabs(data[i]);
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if (max > 0.0) {
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max = 1.0 / max;
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max *= newPeak;
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for (i=0;i<=length;i++)
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data[i] *= max;
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}
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}
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void NIWave1S :: setRate(MY_FLOAT aRate)
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{
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rate = aRate;
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}
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MY_FLOAT NIWave1S :: tick()
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{
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this->informTick();
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return lastOutput;
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}
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int NIWave1S :: informTick()
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{
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int allDone = 0;
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long temp;
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time += rate; /* Update current time */
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if (time >= length) { /* Check for end of sound */
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time = length-1; /* stick at end */
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allDone = 1; /* Information for one-shot use */
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}
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temp = (long) time; /* Integer part of time address */
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lastOutput = data[temp]; /* Get non-interpolated data */
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return allDone;
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}
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MY_FLOAT NIWave1S :: lastOut()
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{
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return lastOutput;
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}
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/************ Test Main Program *****************/
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/*
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void main()
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{
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NIWave1S oneShot("rawwaves/mandpluk.raw");
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FILE *fd;
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short data;
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long i;
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fd = fopen("test.raw","wb");
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for (i=0;i<8192;i++) {
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data = oneShot.tick();
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fwrite(&data,2,1,fd);
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}
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oneShot.reset();
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oneShot.setRate(0.5);
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for (i=0;i<16384;i++) {
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data = oneShot.tick();
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fwrite(&data,2,1,fd);
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}
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fclose(fd);
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}
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*/
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