Question

我需要将输出文件写入具有应用效果的外部存储中，但是不知道如何执行。任何帮助将使音频输出mp3或mp4文件具有效果，将不胜感激。我已经成功完成了实时音高更改，我使用了write file to external storage的一些代码，但是生成的文件只有0个字节并且已损坏。我使用了以下代码

    Bitmap memBitmap(4961, 7016);
    Graphics memGraphics(&memBitmap);
    HDC memHDC = memGraphics.getHDC();
    int iTmp1 = GetDeviceCaps(memHDC, HORZRES);
    int iTmp2 = GetDeviceCaps(memHDC, VERTRES);
    //doSomething...
    memGraphics.ReleaseHDC(memHDC);

请帮助提供此代码。

我有如下错误。

 const char *output1 = "/storage/emulated/0/Music/123456.mp3";
const char *openError = decoder->open(input, false, 0, 0, 0);
if (openError) {
    delete decoder;
    return false;
};

FILE *fd = createWAV(output1, decoder->samplerate, 2);
if (!fd) {
    delete decoder;
    return false;
};

float effectMix = 0.5f;
SuperpoweredFX *effect = NULL;
if (effectId == 0) {
    player->setPitchShift(10);
    effect = new SuperpoweredEcho(decoder->samplerate);
    ((SuperpoweredEcho *) effect)->setMix(effectMix);
} else if (effectId == 1) {
    effect = new SuperpoweredReverb(decoder->samplerate);
    ((SuperpoweredReverb *) effect)->setMix(effectMix);
}

if (effect == NULL) {
    delete decoder;
    return false;
}

effect->enable(true);
short int *intBuffer = (short int *) malloc(
decoder->samplesPerFrame * 2 * sizeof(short int) + 16384);
float *floatBuffer = (float *) malloc(decoder->samplesPerFrame * 2 * sizeof(float) + 1024);
unsigned int samplesDecoded;
while (true) {
    samplesDecoded = decoder->samplesPerFrame;
    if (decoder->decode(intBuffer, &samplesDecoded) == SUPERPOWEREDDECODER_ERROR) {
        break;
    }
    if (samplesDecoded < 1) {
        break;
    }

    SuperpoweredShortIntToFloat(intBuffer, floatBuffer, samplesDecoded);

    effect->process(floatBuffer, floatBuffer, samplesDecoded);

    // Convert the PCM samples from 32-bit floating point to 16-bit integer.
    SuperpoweredFloatToShortInt(floatBuffer, intBuffer, samplesDecoded);
}


fwrite(intBuffer, 1, samplesDecoded * 4, fd);
closeWAV(fd);
delete decoder;
delete effect;
free(intBuffer);
free(floatBuffer);
return true;

Answer 1

错误日志显示了一些Firebase问题，但是代码中发现的一个主要问题是您放置

fwrite(intBuffer, 1, samplesDecoded * 4, fd);

while循环之外。

它应该在它的内部，因为intBuffer在每次迭代中都会填充音频数据块。

超强大的SDK-将更改后的音频效果文件写入外部存储

1 个答案: