1
我嘗試在Qt 5.2.0中使用Speex Accoustic回聲消除,但只刪除了一部分回聲,它仍然保留。
這是我的測試(未優化內存管理)。它會記錄語音,刪除回聲並在400ms後播放,並帶有非常小的回聲消除功能。
任何想法,我的代碼是錯的?
Speex AEC只刪除回聲的一部分
//************
// declared in MainWindows.h
QAudioInput* m_audioInput;
QAudioOutput* m_audioOutput;
QIODevice* m_ioIn;
QIODevice* m_ioOut;
QList<QByteArray> m_listBA;
//************
void MainWindow::InitSpeex()
{
int loc_samplingRate=16000;
int loc_frameSize=320;
m_echo_state = speex_echo_state_init(loc_frameSize, 10*loc_frameSize);
speex_echo_ctl(m_echo_state, SPEEX_ECHO_SET_SAMPLING_RATE, &loc_samplingRate);
m_preprocess = speex_preprocess_state_init(loc_frameSize, loc_samplingRate);
}
void MainWindow::DestroySpeex()
{
speex_echo_state_destroy(m_echo_state);
speex_preprocess_state_destroy(m_preprocess);
m_echo_state = NULL;
m_preprocess = NULL;
}
void MainWindow::Start()
{
QAudioFormat format;
// Set up the desired format, for example:
format.setSampleRate(SAMPLING_RATE);
format.setChannelCount(1);
format.setSampleSize(16);
format.setCodec("audio/pcm");
format.setByteOrder(QAudioFormat::LittleEndian);
format.setSampleType(QAudioFormat::UnSignedInt);
QAudioDeviceInfo loc_infoInput = QAudioDeviceInfo::defaultInputDevice();
if (!loc_infoInput.isFormatSupported(format)) {
qWarning() << "Default format not supported, trying to use the nearest.";
format = loc_infoInput.nearestFormat(format);
}
m_audioInput = new QAudioInput(format, this);
QAudioDeviceInfo loc_infoOutput(QAudioDeviceInfo::defaultOutputDevice());
if (!loc_infoOutput.isFormatSupported(format)) {
qWarning() << "Raw audio format not supported by backend, cannot play audio.";
return;
}
m_audioOutput = new QAudioOutput(format, this);
m_ioIn = m_audioInput->start();
m_ioOut = m_audioOutput->start();
connect(m_ioIn, SIGNAL(readyRead()), this, SLOT(on_data_input()));
}
void MainWindow::on_data_input()
{
// push data on the list
m_listBA.push_back(m_ioIn->readAll());
// il list is about 400ms of sample
if(m_listBA.size() > 20)
{
// send oldest sample to speex and play it
speex_echo_playback(m_echo_state, (spx_int16_t*)m_listBA[1].constData());
m_ioOut->write(m_listBA.takeFirst());
// get most recent sample, remove echo and repush it on the list to be played later
speex_echo_capture(m_echo_state, (spx_int16_t*)m_listBA[m_listBA.size()-1].data(), m_AECBufferOut);
loc_vad = speex_preprocess_run(m_preprocess, m_AECBufferOut);
m_listBA.takeLast();
m_listBA.push_back(QByteArray((const char*)m_AECBufferOut, sizeof(m_AECBufferOut)));
}
}
這個測試可以正常工作,沒有迴音消除,語音被記錄並在400ms後播放,以模擬LIFO的網絡延遲。
沒有問題的內存或指針大小,問題是回聲部分刪除,我們仍然可以聽取它。 – Pierre