mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-01 10:32:40 +00:00
108 lines
2.5 KiB
C
108 lines
2.5 KiB
C
/*============================================================
|
|
|
|
Test code for emu2413.c
|
|
|
|
Write 2 seconds of the piano tone into temp.wav
|
|
|
|
gcc -Wall -lm sample2413.c emu2413.c
|
|
(The author had tried to compile on Solaris7 with gcc 2.8.1)
|
|
|
|
=============================================================*/
|
|
#include "emu2413.h"
|
|
#include <stdio.h>
|
|
#include <time.h>
|
|
|
|
/*
|
|
* Standard clock = MSX clock
|
|
*/
|
|
#define MSX_CLK 3579545
|
|
|
|
#define SAMPLERATE 44100
|
|
#define DATALENGTH (SAMPLERATE * 8)
|
|
|
|
static void WORD(char *buf, uint32_t data) {
|
|
|
|
buf[0] = data & 0xff;
|
|
buf[1] = (data & 0xff00) >> 8;
|
|
}
|
|
|
|
static void DWORD(char *buf, uint32_t data) {
|
|
|
|
buf[0] = data & 0xff;
|
|
buf[1] = (data & 0xff00) >> 8;
|
|
buf[2] = (data & 0xff0000) >> 16;
|
|
buf[3] = (data & 0xff000000) >> 24;
|
|
}
|
|
|
|
static void chunkID(char *buf, char id[4]) {
|
|
|
|
buf[0] = id[0];
|
|
buf[1] = id[1];
|
|
buf[2] = id[2];
|
|
buf[3] = id[3];
|
|
}
|
|
|
|
int main(void) {
|
|
|
|
static char wave[DATALENGTH * 2];
|
|
char filename[16] = "temp.wav";
|
|
char header[46];
|
|
int i;
|
|
clock_t start, finish;
|
|
|
|
FILE *fp;
|
|
OPLL *opll;
|
|
|
|
/*
|
|
* Create WAVE header
|
|
*/
|
|
chunkID(header, "RIFF");
|
|
DWORD(header + 4, DATALENGTH * 2 + 36);
|
|
chunkID(header + 8, "WAVE");
|
|
chunkID(header + 12, "fmt ");
|
|
DWORD(header + 16, 16);
|
|
WORD(header + 20, 1); /* WAVE_FORMAT_PCM */
|
|
WORD(header + 22, 1); /* channel 1=mono,2=stereo */
|
|
DWORD(header + 24, SAMPLERATE); /* samplesPerSec */
|
|
DWORD(header + 28, 2 * SAMPLERATE); /* bytesPerSec */
|
|
WORD(header + 32, 2); /* blockSize */
|
|
WORD(header + 34, 16); /* bitsPerSample */
|
|
chunkID(header + 36, "data");
|
|
DWORD(header + 40, 2 * DATALENGTH);
|
|
|
|
opll = OPLL_new(MSX_CLK, SAMPLERATE);
|
|
OPLL_reset(opll);
|
|
OPLL_writeReg(opll, 0x30, 0x30); /* select PIANO Voice to ch1. */
|
|
OPLL_writeReg(opll, 0x10, 0x80); /* set F-Number(L). */
|
|
OPLL_writeReg(opll, 0x20, 0x15); /* set BLK & F-Number(H) and
|
|
* keyon. */
|
|
|
|
start = clock();
|
|
|
|
i = 0;
|
|
|
|
for (i = 0; i < DATALENGTH; i++) {
|
|
WORD(wave + i * 2, OPLL_calc(opll));
|
|
}
|
|
|
|
finish = clock();
|
|
OPLL_delete(opll);
|
|
|
|
printf("It has been %f sec to calc %d waves.\n", (double)(finish - start) / CLOCKS_PER_SEC, DATALENGTH);
|
|
printf("%f times faster than real YM2413.\n",
|
|
((double)DATALENGTH / SAMPLERATE) / ((double)(finish - start) / CLOCKS_PER_SEC));
|
|
|
|
fp = fopen(filename, "wb");
|
|
|
|
if (fp == NULL)
|
|
return 1;
|
|
|
|
fwrite(header, 46, 1, fp);
|
|
fwrite(wave, DATALENGTH, 2, fp);
|
|
|
|
fclose(fp);
|
|
|
|
printf("Wrote : %s\n", filename);
|
|
|
|
return 0;
|
|
}
|