超强Android 回放与录音同时进行

Question

我正在使用 Superpowered Android C++ 库开发混音器，我在录制时遇到播放器问题，播放器不播放，只有录音机在录制。下面是代码，谁能指导我哪里放错了东西

bool processRecording(short int *input, unsigned int numberOfSamples) {
pthread_mutex_lock(&mutex);
if (askRecording) {
    unsigned int data = 0;

       SuperpoweredShortIntToFloat(input, stereoBufferRecording, numberOfSamples);
       data = recorder->process(stereoBufferRecording, NULL, numberOfSamples);

       playerA->process( musicBuffer, false, numberOfSamples, 0.5f );
       SuperpoweredShortIntToFloat(input, stereoBufferRecording, numberOfSamples);

       SuperpoweredFloatToShortInt(musicBuffer, input, numberOfSamples);

       pthread_mutex_unlock(&mutex);
       return true;
       }
pthread_mutex_unlock(&mutex);
return false;
}

有没有人知道如何把它放在正确的位置？

在 @Gabor 建议的更改之后，以下是代码片段

bool processRecording(short int *input, unsigned int numberOfSamples) {

pthread_mutex_lock(&mutex);
if (askRecording) {
    unsigned int data = 0;
    SuperpoweredShortIntToFloat(input, stereoBufferRecording, numberOfSamples);

    playerA->process( musicBuffer, false, numberOfSamples, 1.0f );

//=====================================================================================
 // ================== Mixing Two Buffer ==================

    mixerInputs[0] = musicBuffer;
    mixerInputs[1] = stereoBufferRecording;
    mixerInputs[2] = NULL;
    mixerInputs[3] = NULL;

    mixerOutputs[0] = outputBuffer;
    mixerOutputs[1] = NULL;

    float inputLevels[] = { 0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f };
    float outputLevels[] = { 1.0f, 1.0f };
    __android_log_print(ANDROID_LOG_INFO, "NativeSuperpoweredRecorder  ", " processRecording 2>>");
    mixerBackend->process(mixerInputs, mixerOutputs, inputLevels, outputLevels, NULL, NULL, numberOfSamples);

//=====================================================================================

    data = recorder->process(mixerOutputs[0], NULL, numberOfSamples);
    SuperpoweredFloatToShortInt(musicBuffer, input, numberOfSamples);
    pthread_mutex_unlock(&mutex);
    return true;
}
pthread_mutex_unlock(&mutex);

return false; }

Answer 1

这是您在代码中所做的：

输入->stereoBufferRecording->录音机

输入->stereoBufferRecording->?

播放器->musicBuffer->输入

当 askRecording 为 false 时，播放器根本没有播放。

我猜 "input" 也是去往 "output" 的同一个缓冲区？

超强Android 回放与录音同时进行

Superpowered Android PlayBack & Record Simultaneously

c++

audio

android

audio-recording

superpowered