1、README
a. 编译
$ make # or `make CC=your-corosscompile-gcc`
b. 使用
注意：分离左右声道的前提是输入的PCM文件（数据）是双声道。
$ ./pcm_channels_split
Usage: ./pcm_channels_split in.pcm out_l.pcm out_r.pcm
examples:./pcm_channels_split ./audio/test_22050_16_2.pcm ./test_22050_16_1-l.pcm ./test_22050_16_1-r.pcm./pcm_channels_split ./audio/test_44100_16_2.pcm ./test_44100_16_1-l.pcm ./test_44100_16_1-r.pcm
c. 附录（demo目录架构）
.
├── audio
│ ├── test_22050_16_1-l.pcm
│ ├── test_22050_16_1-r.pcm
│ ├── test_22050_16_2.pcm
│ ├── test_44100_16_1-l.pcm
│ ├── test_44100_16_1-r.pcm
│ └── test_44100_16_2.pcm
├── docs
│ └── PCM音频数据 - 简书.mhtml
├── main.c
├── Makefile
└── README.md
2、主要代码片段
main.c
#include <stdio.h>
#include <stdlib.h>int pcm_s16le_split(const char* file, const char* out_lfile, const char* out_rfile);int main(int argc, char *argv[])
{if (argc != 4){ printf("Usage: %s in.pcm out_l.pcm out_r.pcm\n", argv[0]);printf("examples: \n""\t %s ./audio/test_22050_16_2.pcm ./test_22050_16_1-l.pcm ./test_22050_16_1-r.pcm\n""\t %s ./audio/test_44100_16_2.pcm ./test_44100_16_1-l.pcm ./test_44100_16_1-r.pcm\n",argv[0], argv[0]);return -1;}/* 注意：分离左右声道的前提是输入的PCM文件（数据）是双声道 */pcm_s16le_split(argv[1], argv[2], argv[3]);return 0;
}int pcm_s16le_split(const char* file, const char* out_lfile, const char* out_rfile)
{FILE *fp = fopen(file, "rb+");if (fp == NULL) {printf("open %s failed\n", file);return -1;}FILE *fp1 = fopen(out_lfile, "wb+");if (fp1 == NULL) {printf("open %s failed\n", out_lfile);return -1;}FILE *fp2 = fopen(out_rfile, "wb+");if (fp2 == NULL) {printf("open %s failed\n", out_rfile);return -1;}char * sample = (char *)malloc(4);while(1) {int readbytes = fread(sample, 1, 4, fp);if(readbytes <= 0){// 没有数据就不要写了break;}// Lfwrite(sample, 1, 2, fp1);// Rfwrite(sample + 2, 1, 2, fp2);}free(sample);fclose(fp);fclose(fp1);fclose(fp2);return 0;
}3、demo下载地址（任选一个）
-
https://download.csdn.net/download/weixin_44498318/89525128
-
https://gitee.com/linriming/audio_pcm_channels_split.git
-
https://github.com/linriming20/audio_pcm_channels_split.git
