wave 음악파일만들기

기본 wave 포맷을 아래에서 얻었고 수정을 했다.

http://www.devpia.com/Maeul/Contents/Detail.aspx?BoardID=50&MAEULNo=20&no=898009&ref=898009

현재

a키를 누르고 enter를 누르면 record가 시작되며

s키를 누르면 record가 종료된다.

계이름은 아래와 같다.

z   x  c  v  b  n  m  ,

도 레 미 파 솔 라 시 도

샘플로 학교종이 땡땡땡 계이름이다.

솔솔라라 솔솔미 솔솔미미레

솔솔라라 솔솔미 솔미레미도

bbnn bbc bbccx

bbnn bbc bcxcz

내가 수정한 부분만 올리겠다.

main.c

#include <stdio.h> #include <math.h> #include "wave.h" #include "util.h" #define NUM_SCALE 8 int main( void ) { char *filename = "synthesis.wav"; double baseFrequency = 220.0; int scaleIndex[NUM_SCALE] = {3, 5, 7, 8, 10, 12, 14, 15}; double freq[NUM_SCALE]; DWORD nSamplesPerSec = 44100; // 44.1kHz sampling WORD nBitsPerSample = 8; // 16bits WORD nChannels = 2; // stereo double fSamplesInterval = 1.0/nSamplesPerSec; double fPlayTime = 1.0; //default value 1.0 double frecordTime; long nSampleDataSize; BYTE *sampleData; int result = 0; long index; int i, j; //record start frecordTime = getKeyinserSound(); printf("total record time : %lf\n", frecordTime); // 주파수에 따른 음 생성 for( index=0; index<NUM_SCALE; index++ ) freq[index] = baseFrequency * pow(2.0, scaleIndex[index]/12.0); format_1s_time = nSampleDataSize = (long) (fPlayTime * nSamplesPerSec * nChannels * nBitsPerSample / 8); sampleData = (BYTE *) malloc(sizeof(BYTE) * nSampleDataSize * frecordTime); //make wavefile for (i = 0; i < MAX_KEYNUMBER; i++) for (j = 0; j < key[i].currentFlag; j+=2) { long d_start = formatTime(key[i].time_array[j]), d_end = formatTime(key[i].time_array[j + 1]); insertSound(freq[i], nBitsPerSample, nChannels, fSamplesInterval, d_start, d_end - d_start, sampleData); } result = WritePCMSamples(filename, nSamplesPerSec, nBitsPerSample, nChannels, nSampleDataSize * frecordTime, sampleData); if( result == 0 ) printf( "Success \n" ); free( sampleData ); return 0; }

util.h

#include <windows.h> #define PI 3.1415926535897 #define MAX_SAVEKEYVALUE 50 #define MAX_KEYNUMBER 8 typedef struct { int isOn;//isKey Push, Pop int currentFlag;//current key's value Index double time_array[MAX_SAVEKEYVALUE];// start, end Time } keyboard_key; keyboard_key key[MAX_KEYNUMBER]; long format_1s_time; void keyInitialLize(); int formatTime(double time); double diffTime(double start_time); double getKeyinserSound(); void insertSound(double freq, WORD nBitsPerSample, WORD nChannels, double fSamplesInterval, long start, long nSampleDataSize, BYTE *sampleData);

util.c

#include <stdio.h> #include <math.h> #include <time.h> #include "util.h" void keyInitialLize() { int index; for (index = 0; index < MAX_KEYNUMBER; index++) { key[index].currentFlag = 0; key[index].isOn = 0; } } int formatTime(double time) { return (int)(time*format_1s_time); } double diffTime(double start_time) { return (clock() - start_time)/1000; } double getKeyinserSound() { double start; keyInitialLize(); printf("'a' key is record start!\n"); printf("'s' key is record end!\n"); if (getchar() == 'a') start = clock(); printf("record start\n"); while (1) { if (!key[0].isOn && GetAsyncKeyState(0x5A) & 0x0001)//z { key[0].isOn = 1; key[0].time_array[key[0].currentFlag++] = diffTime(start); } if (key[0].isOn && GetAsyncKeyState(0x5A) == 0x0000) { key[0].isOn = 0; key[0].time_array[key[0].currentFlag++] = diffTime(start); } if (!key[1].isOn && GetAsyncKeyState(0x58) & 0x0001)//x { key[1].isOn = 1; key[1].time_array[key[1].currentFlag++] = diffTime(start); } if (key[1].isOn && GetAsyncKeyState(0x58) == 0x0000) { key[1].isOn = 0; key[1].time_array[key[1].currentFlag++] = diffTime(start); } if (!key[2].isOn && GetAsyncKeyState(0x43) & 0x0001)//c { key[2].isOn = 1; key[2].time_array[key[2].currentFlag++] = diffTime(start); } if (key[2].isOn && GetAsyncKeyState(0x43) == 0x0000) { key[2].isOn = 0; key[2].time_array[key[2].currentFlag++] = diffTime(start); } if (!key[3].isOn && GetAsyncKeyState(0x56) & 0x0001)//v { key[3].isOn = 1; key[3].time_array[key[3].currentFlag++] = diffTime(start); } if (key[3].isOn && GetAsyncKeyState(0x56) == 0x0000) { key[3].isOn = 0; key[3].time_array[key[3].currentFlag++] = diffTime(start); } if (!key[4].isOn && GetAsyncKeyState(0x42) & 0x0001)//b { key[4].isOn = 1; key[4].time_array[key[4].currentFlag++] = diffTime(start); } if (key[4].isOn && GetAsyncKeyState(0x42) == 0x0000) { key[4].isOn = 0; key[4].time_array[key[4].currentFlag++] = diffTime(start); } if (!key[5].isOn && GetAsyncKeyState(0x4E) & 0x0001)//n { key[5].isOn = 1; key[5].time_array[key[5].currentFlag++] = diffTime(start); } if (key[5].isOn && GetAsyncKeyState(0x4E) == 0x0000) { key[5].isOn = 0; key[5].time_array[key[5].currentFlag++] = diffTime(start); } if (!key[6].isOn && GetAsyncKeyState(0x4D) & 0x0001)//z { key[6].isOn = 1; key[6].time_array[key[6].currentFlag++] = diffTime(start); } if (key[6].isOn && GetAsyncKeyState(0x4D) == 0x0000) { key[6].isOn = 0; key[6].time_array[key[6].currentFlag++] = diffTime(start); } if (!key[7].isOn && GetAsyncKeyState(0x2C) & 0x0001)//z { key[7].isOn = 1; key[7].time_array[key[7].currentFlag++] = diffTime(start); } if (key[7].isOn && GetAsyncKeyState(0x2C) == 0x0000) { key[7].isOn = 0; key[7].time_array[key[7].currentFlag++] = diffTime(start); } if (GetAsyncKeyState(0x53) & 0x8000) break; //Sleep(80);//속도조절 } printf("record end\n"); return diffTime(start); } void insertSound(double freq, WORD nBitsPerSample, WORD nChannels, double fSamplesInterval, long start, long nSampleDataSize, BYTE *sampleData) { double t; int index; t = 0.0; for (index = 0; index<nSampleDataSize; index++) { if (nBitsPerSample == 8) { BYTE left; int k; double value = 0; for (k = 1; k <= 10; k++) value += sin((2.0*k) * PI * freq * t); left = sampleData[start + index] = (BYTE) (128.0 + (100.0 / (k - 1))*value + 0.5); if (nChannels == 2) { sampleData[start + (++index)] = left; } } else if (nBitsPerSample == 16) { union { BYTE channel[2]; short sample; } value; BYTE leftLow, leftHigh; int k; double tvalue = 0; for (k = 1; k <= 10; k++) tvalue += sin((2.0*k) * PI * freq * t); value.sample = (short) (30000 / (k - 1) * tvalue + 0.5); leftLow = sampleData[start + index] = value.channel[0]; leftHigh = sampleData[start + (++index)] = value.channel[1]; if (nChannels == 2) { sampleData[start + (++index)] = leftLow; sampleData[start + (++index)] = leftHigh; } } t += fSamplesInterval; } }