added wave writer code
parent
52f3b75dc0
commit
7908c76d60
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/*
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* Filename: WavWriter.cpp
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*
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* Description:
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*
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*
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* Version:
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* Created: Mon Mar 9 19:31:28 2020
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* Revision: None
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* Author: Rachel Fae Fox (foxiepaws),fox@foxiepa.ws
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*
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*/
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#include "WavWriter.h"
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#include <cstdarg>
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WavWriter::WavWriter(char* filename, uint srate, uint chan, uint bps) {
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file = fopen(filename, "w");
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sr = srate;
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ch = chan;
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bd = bps;
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length = 0;
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byterate = sr * ch * (bd/8);
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blockalign = ch * (bd/8);
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// initialise the first 40 bytes for the header later.
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for (int x = 0; x < 40; x++) {
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fputc(0x00,file);
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}
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}
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void WavWriter::writeHeader() {
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rewind(file);
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fprintf(file,"RIFF");
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writeBytes((char*) &riffsize,4);
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fprintf(file,"WAVEfmt ");
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writeBytes((char*) &fmtsize,4);
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writeBytes((char*) &type,2);
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writeBytes((char*) &ch,2);
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writeBytes((char*) &sr,4);
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writeBytes((char*) &byterate,4);
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writeBytes((char*) &blockalign,2);
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writeBytes((char*) &bd, 2);
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fprintf(file,"data");
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writeBytes((char*) &datasize, 4);
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}
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void WavWriter::finalise() {
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datasize = length;
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riffsize = 20 + fmtsize + datasize;
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writeHeader();
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fclose(file);
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}
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void WavWriter::write(...) {
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va_list args;
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va_start(args, ch);
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for (int i=0;i < ch;i++) {
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uint32_t v = va_arg(args,int);
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writeBytes((char*) &v,(bd/8));
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}
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va_end(args);
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}
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void WavWriter::writeBytes(char* bytes, uint count) {
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for (int i = 0; i < count ; i++) {
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length++;
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putc(bytes[i],file);
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}
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}
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WavWriter::~WavWriter(){}
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@ -0,0 +1,63 @@
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/*
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* Filename: WavWriter.h
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*
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* Description:
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*
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*
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* Version:
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* Created: Mon Mar 9 18:00:11 2020
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* Revision: None
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* Author: Rachel Fae Fox (foxiepaws),fox@foxiepa.ws
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*
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*/
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#include <cstdint>
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#include <cstdio>
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// standard wave files have a 32bit size limit.
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#define WAVMAX (0xffffff - 20)
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typedef unsigned int uint;
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class WavWriter {
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uint32_t length = 0;
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uint32_t sr; // sample rate (gstool(samplerate))
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uint16_t bd; // bit depth (gstool(bitdepth))
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uint16_t ch; // channels (gstool(channels))
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uint32_t datasize;
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uint32_t fmtsize = 16;
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uint16_t type = 1;
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uint32_t riffsize;
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uint32_t byterate;
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uint16_t blockalign;
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FILE* file;
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// helpers
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bool fit() { return (WAVMAX-fmtsize) > (length + byterate); } // see if one more sample will fit
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void writeBytes(char* bytes, uint count);
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public:
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// gstool
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/* BEGIN GSTOOL GENERATED BLOCK */
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// getters
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uint32_t samplerate() { return sr; }
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uint16_t bitdepth() { return bd; }
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uint16_t channels() { return ch; }
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// setters
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void samplerate(uint32_t v) { sr = v; }
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void bitdepth(uint16_t v) { bd = v; }
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void channels(uint16_t v) { ch = v; }
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/* END GSTOOL GENERATED BLOCK */
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WavWriter() {}
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~WavWriter();
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WavWriter(char* filename, uint srate, uint chan, uint bps);
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void finalise();
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void writeHeader();
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void write(...);
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};
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/* Local Variables: */
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/* mode: c++ */
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/* flycheck-clang-language-standard: "c++11" */
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/* End: */
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@ -0,0 +1,51 @@
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/*
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* Filename: wavtest.cpp
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*
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* Description:
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*
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*
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* Version:
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* Created: Mon Mar 9 23:06:08 2020
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* Revision: None
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* Author: Rachel Fae Fox (foxiepaws),fox@foxiepa.ws
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include "FM/Engine.h"
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#include "WavWriter/WavWriter.h"
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int16_t toint16(double i) {
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double temp = i *= 32767;
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return floor(temp);
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}
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int main(int argc, char** argv){
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FM::Engine<2> *f = new FM::Engine<2>();
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f->getOperator(0)->setAll(2.0,0.0,0.0);
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f->getOperator(0)->getEnvelope()->setAttackTime(1.0);
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f->getOperator(0)->getEnvelope()->setDecayTime(0.5);
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f->getOperator(0)->getEnvelope()->setMaxLevel(1.0);
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f->getOperator(0)->getEnvelope()->setModMode(true); // play until reset.
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f->getOperator(1)->getEnvelope()->setReleaseTime(2.5);
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f->getOperator(1)->setAll(1.0,0.0,0.0);
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f->setGainMatrix(0,0,0.0); // op1 fbl = 0
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f->setGainMatrix(0,1,1.0); // op1 -> op2 = 1
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f->setGainMatrix(1,0,0.0); // op2 -> op1 = 0
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f->setGainMatrix(1,2,1.0); // op2 -> out = 1
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f->freq = 440;
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f->gate = true;
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double seconds = 20;
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// init a new writer
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WavWriter *w = new WavWriter("wavtest.wav",44100,2,16);
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for (int s = 0; s < 44100*seconds; s++) {
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std::pair<double,double> st = (*f)();
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w->write(toint16(st.first/4.0), toint16(st.second/4.0));
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}
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w->finalise();
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return 0;
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}
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