iPhone/iPad搞定Audio Unit声音 2012/05/15

1. 处理样本大小由160变成186的问题

搞定！（12：30）

#include <queue>

using namespace std; 

class AudioBufferHandler {

public:

    AudioBufferHandler(int intpuSize, int outputSize);

    void putAudioData(short *data, int len);

    int needMoreData(); 

    void getAudioData(short *data, int len);

    

private:

    int inputSize, outputSize;

    queue<short> audioQueue; 

};

#include "AudioBufferHandler.h"

AudioBufferHandler::AudioBufferHandler(int s1, int s2):inputSize(s1), outputSize(s2)

{}

void AudioBufferHandler::putAudioData(short *data, int len) {

    for (int i=0; i<len; i++) {

        audioQueue.push(data[i]);

    }

}

int AudioBufferHandler::needMoreData() {

    return audioQueue.size() < outputSize;

}

void AudioBufferHandler::getAudioData(short *data, int len) {

    for (int i=0; i<len; i++) {

        data[i] = audioQueue.front();

        audioQueue.pop();

    }

}

render callback: 

// read audio data, at most 3*160=480 samples

    for (int i=0; i<3; i++) {

    if (audioBufferHandler->needMoreData()) {

        memset(buf, 0, AUDIO_DATA_PACKET_SIZE_IN_BYTES);

        getAudioData(0, buf, &readCount);      // read audio data from channel 0

        audioBufferHandler->putAudioData((short *)buf, 160);

    }

    

if (readCount == 0) {

return noErr;        // if no audio data, do nothing.

}

    }