wav音频混音 c语言源代码
时间: 2024-01-20 13:01:02 浏览: 260
音频混音是将多个音频信号合并为一个单一的音频信号的过程。常见的音频混音格式是WAV(Waveform Audio File Format)。下面是一个用C语言编写的WAV音频混音的简单示例代码:
```c
#include <stdio.h>
#include <stdint.h>
int main() {
// 打开输入文件
FILE* file1 = fopen("input1.wav", "rb");
FILE* file2 = fopen("input2.wav", "rb");
if (file1 == NULL || file2 == NULL) {
printf("无法打开输入文件\n");
return 1;
}
// 读取WAV文件头
uint8_t header1[44];
uint8_t header2[44];
fread(header1, sizeof(uint8_t), 44, file1);
fread(header2, sizeof(uint8_t), 44, file2);
// 判断文件是否为WAV格式
if (header1[0] != 'R' || header1[1] != 'I' || header1[2] != 'F' || header1[3] != 'F' ||
header1[8] != 'W' || header1[9] != 'A' || header1[10] != 'V' || header1[11] != 'E' ||
header2[0] != 'R' || header2[1] != 'I' || header2[2] != 'F' || header2[3] != 'F' ||
header2[8] != 'W' || header2[9] != 'A' || header2[10] != 'V' || header2[11] != 'E') {
printf("输入文件不是WAV格式\n");
return 1;
}
// 获取音频数据大小
uint32_t dataSize1 = *((uint32_t*)(header1 + 40));
uint32_t dataSize2 = *((uint32_t*)(header2 + 40));
// 创建输出文件
FILE* outputFile = fopen("output.wav", "wb");
if (outputFile == NULL) {
printf("无法创建输出文件\n");
return 1;
}
// 写入WAV文件头
fwrite(header1, sizeof(uint8_t), 44, outputFile);
// 混音
uint8_t buffer1;
uint8_t buffer2;
for (uint32_t i = 0; i < dataSize1 && i < dataSize2; i++) {
fread(&buffer1, sizeof(uint8_t), 1, file1);
fread(&buffer2, sizeof(uint8_t), 1, file2);
uint8_t mixedBuffer = (buffer1 + buffer2) / 2;
fwrite(&mixedBuffer, sizeof(uint8_t), 1, outputFile);
}
// 关闭文件
fclose(file1);
fclose(file2);
fclose(outputFile);
return 0;
}
```
以上代码是一个简单的WAV音频混音的示例,它会将两个输入的WAV音频文件混合成一个输出的WAV音频文件。请将待混音的音频文件命名为"input1.wav"和"input2.wav",混音结果会保存为"output.wav"文件。代码会将两个输入文件的每个采样数据进行平均,然后写入输出文件。
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