Question

请你告诉我这是怎么做到的？在一台设备上录制音频＆amp;在其他（VoIP）上玩？

我被困在这里：我在这个功能中的一个设备上获取输入语音数据

void AQRecorder::MyInputBufferHandler(  void *                              inUserData,
                                        AudioQueueRef                       inAQ,
                                        AudioQueueBufferRef                 inBuffer,
                                        const AudioTimeStamp *              inStartTime,
                                        UInt32                              inNumPackets,
                                        const AudioStreamPacketDescription* inPacketDesc)
{
    AQRecorder *aqr = (AQRecorder *)inUserData;
    try {
        if (inNumPackets > 0) {
            // write packets to file
            XThrowIfError(AudioFileWritePackets(aqr->mRecordFile, FALSE, inBuffer->mAudioDataByteSize,
                                             inPacketDesc, aqr->mRecordPacket, &inNumPackets, inBuffer->mAudioData),
                       "AudioFileWritePackets failed");
            //inData = inBuffer->mAudioData;
            aqr->mRecordPacket += inNumPackets;
            aqr->updateIndata(inBuffer);
        }

        // if we're not stopping, re-enqueue the buffe so that it gets filled again
        if (aqr->IsRunning())
            XThrowIfError(AudioQueueEnqueueBuffer(inAQ, inBuffer, 0, NULL), "AudioQueueEnqueueBuffer failed");
    } catch (CAXException e) {
        char buf[256];
        fprintf(stderr, "Error: %s (%s)\n", e.mOperation, e.FormatError(buf));
    }
}

我将数据包发送到UDP：

void AQRecorder::updateIndata(AudioQueueBufferRef inBuffer)
{
    SpeakHereAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
    NSData *audioBytes = [NSData dataWithBytes:inBuffer->mAudioData 
                                        length:inBuffer->mAudioDataByteSize];
    NSLog(@"bytes: %d", [audioBytes length]);
    [appDelegate.udpSocket sendData:audioBytes 
                             toHost:appDelegate.host
                               port:appDelegate.port
                        withTimeout:-1
                                tag:1];
}

＆安培;我正在接收另一端的数据作为NSData，但不知道怎么玩，请你帮忙

Answer 1

您需要一个像CARingBuffer这样的环形缓冲区来存储接收到的音频数据，并像Audio Unit Render Callback方法一样从缓冲区读取数据。由于写入和读取操作是异步的并且速度不同，因此很难确定环形缓冲区应该有多长。因此，您还可以使用临时文件存储接收的数据，始终将日期写入文件的末尾，并从头部读取。

使用音频队列或音频单元的VoIP功能

1 个答案: