C语言实现WAV混音

#include <stdio.h>
#include <stdlib.h>
#include <math.h>#define SIZE_AUDIO_FRAME (2)void Mix(char sourseFile[10][SIZE_AUDIO_FRAME], int number, char *objectFile){int const MAX = 32767;int const MIN = -32768;double f = 1;int output;int i = 0, j = 0;for (i = 0; i<SIZE_AUDIO_FRAME / 2; i++){int temp = 0;for (j = 0; j<number; j++){temp += *(short*)(sourseFile[j] + i * 2);}output = (int)(temp*f);if (output>MAX){f = (double)MAX / (double)(output);output = MAX;}if (output<MIN){f = (double)MIN / (double)(output);output = MIN;}if (f<1){f += ((double)1 - f) / (double)32;}*(short*)(objectFile + i * 2) = (short)output;}
}int main(int argc, char *argv[]) {if(argc!=argc){printf("error!\n");return 0;}FILE * fp1, *fp2, *fpm;fp1 = fopen(argv[1], "rb");fp2 = fopen(argv[2], "rb");fpm = fopen(argv[3], "wb");short data1, data2, date_mix;int ret1, ret2;char sourseFile[10][2];while (1){ret1 = fread(&data1, 2, 1, fp1);ret2 = fread(&data2, 2, 1, fp2);*(short*)sourseFile[0] = data1;*(short*)sourseFile[1] = data2;if (ret1>0 && ret2>0){Mix(sourseFile, 2, (char *)&date_mix);/*if( data1 < 0 && data2 < 0)date_mix = data1+data2 - (data1 * data2 / -(pow(2,16-1)-1));elsedate_mix = data1+data2 - (data1 * data2 / (pow(2,16-1)-1));*/if (date_mix > pow(2, 16 - 1) || date_mix < -pow(2, 16 - 1))printf("mix error\n");}else if ((ret1 > 0) && (ret2 == 0)){date_mix = data1;}else if ((ret2 > 0) && (ret1 == 0)){date_mix = data2;}else if ((ret1 == 0) && (ret2 == 0)){break;}fwrite(&date_mix, 2, 1, fpm);}fclose(fp1);fclose(fp2);fclose(fpm);printf("OK Done!\n");
}

可以在centos下编译
# gcc -o hunyun hunyun.c
# ./hunyun 1.wav 2.wav 3.pcm

wav文件要编码一样才可以