A lot of noise #128
Description
I don't know why the converted pcm sounds so noisy
`
#include <stdio.h>
#include <stdlib.h>
#define MINIMP3_IMPLEMENTATION
#define AUDIO_BUF_SIZE MINIMP3_MAX_SAMPLES_PER_FRAME
#include "minimp3.h"
int main() {
size_t samples;
size_t cur_pos = 0;
unsigned char *input_buf = NULL;
/*unsigned char *input_buf; - input byte stream*/
int data_size = 0;
//打开MP3文件
FILE* file=fopen("uy.mp3", "r");
FILE* fout=fopen("uy.pcm", "a");
//获取MP3文件长度
fseek(file, 0, SEEK_END);
data_size = (int)ftell(file);
//读取整个MP3文件
fseek(file, 0, SEEK_SET);
input_buf = malloc(data_size);
fread(input_buf, 1, data_size, file);
//初始化minimp3的解码器结构
static mp3dec_t mp3d;
mp3dec_init(&mp3d);
//定义mp3dec_frame_info_t
mp3dec_frame_info_t info;
short pcm[MINIMP3_MAX_SAMPLES_PER_FRAME];
long long mp3len = 0;
//逐帧解码并且播放MP3
samples = mp3dec_decode_frame(&mp3d, input_buf, data_size, pcm, &info);
while(samples) {
printf("%d%d\r\n",&pcm, samples);
fwrite(pcm,sizeof(pcm),1,fout);
//fputs(pcm,fout);
mp3len += info.frame_bytes;
samples = mp3dec_decode_frame(&mp3d, input_buf + mp3len, data_size - mp3len, pcm, &info);
}
free(input_buf);
return 0;
}`
Audio with https://music.163.com/song/media/outer/url?id=2155422573.mp3
There is another question, how many “samples” should be when decoding, I have always been 1152