1

我只是 android studio 的新人。这是我提高音频（mp3，wav）文件增益的代码。我不知道如何在 android studio 中实现。我已经在 raw 目录中存储了一个 mp3 文件，我正在使用文本框或搜索栏从用户那里获取增益值，之后它将播放改进的增益音频。有人知道该怎么做吗？

    #include<stdio.h>
    #include<stdlib.h>
    #include<string.h>
    #include<math.h>
    typedef struct header_file
    {
    char chunk_id[4];
    int chunk_size;
    char format[4];
    char subchunk1_id[4];
    int subchunk1_size;
    short int audio_format;
    short int num_channels;
    int sample_rate;
    int byte_rate;
    short int block_align;
    short int bits_per_sample;
    char subchunk2_id[4];
    int subchunk2_size;
    } header;
    
    
    typedef struct header_file* header_p;
    
    
    typedef  float float32_t;
    typedef  int uint32_t;
    
    FILE *fr, *fw;
    float fs;
    
    #define FRAME 256
    
    int main(int argc, char *argv[] )
    {
        char a[100];
        strcpy(a,argv[1]);
        int gain=atoi(a);
    fr = fopen("sweeptest.wav", "rb");
    fw = fopen( "out1.wav", "wb");
    header_p meta = (header_p) malloc(sizeof(header));
    fread(meta, 1, sizeof(header), fr);
    fwrite(meta, 1, sizeof(header), fw);
    fs = meta->sample_rate;
    
    float src[FRAME] = { 0 };
    float out1[FRAME] = { 0 };
    float out[FRAME] = { 0 };
    
    short Inbuf[256] = { 0 };
    short outbuf[256] = { 0 };
    int i=0;
    
    float j = gain/20;
        float gain_value = pow(10,j);
    while (!feof(fr)) {
    
    fread(Inbuf, sizeof(short int), FRAME, fr);
    
    
    for ( i = 0; i < FRAME; i++)
    {
       src[i] = (float)(Inbuf[i] / 32767.f);
       out1[i] = (src[i] * gain_value);
    outbuf[i] =(short)( (out1[i]* 32767.f));
    }
    
    fwrite(outbuf, sizeof(short int), FRAME, fw);
    
    }
    printf("Program finished");
    
    return 0;
    }
4

0 回答 0