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41 #include <QtCore/qstring.h>
42 #include <QAudioOutput>
44 #include "GEAudioOut.h"
47 //using namespace QTM_NAMESPACE;
55 const int CHANNELS = 2;
56 const QString CODEC = "audio/pcm";
57 const QAudioFormat::Endian BYTEORDER = QAudioFormat::LittleEndian;
58 const QAudioFormat::SampleType SAMTYPE = QAudioFormat::SignedInt;
62 AudioOut::AudioOut( QObject *parent, GE::IAudioSource *source ) : QThread(parent) { // qobject
65 format.setFrequency(AUDIO_FREQUENCY);
66 format.setChannels(CHANNELS);
67 format.setSampleSize(AUDIO_SAMPLE_BITS);
68 format.setCodec(CODEC);
69 format.setByteOrder(BYTEORDER);
70 format.setSampleType(SAMTYPE);
72 QAudioDeviceInfo info(QAudioDeviceInfo::defaultOutputDevice());
73 if (!info.isFormatSupported(format))
74 format = info.nearestFormat(format);
77 m_audioOutput = new QAudioOutput(info,format);
80 m_audioOutput->setBufferSize(20000);
81 m_sendBufferSize = 5000;
83 m_audioOutput->setBufferSize(16000);
84 m_sendBufferSize = 4000;
87 m_outTarget = m_audioOutput->start();
90 m_sendBuffer = new AUDIO_SAMPLE_TYPE[ m_sendBufferSize ];
98 m_audioOutput->setNotifyInterval(5);
99 connect(m_audioOutput,SIGNAL(notify()),SLOT(audioNotify()));
105 AudioOut::~AudioOut() {
106 if (m_runstate==0) m_runstate = 1;
107 if (QThread::isRunning() == false) m_runstate = 2;
108 while (m_runstate!=2) { msleep(50); } // wait until the thread is finished
109 m_audioOutput->stop();
110 delete m_audioOutput;
111 delete [] m_sendBuffer;
115 void AudioOut::audioNotify() {
119 void AudioOut::tick() {
120 // fill data to buffer as much as free space is available..
121 int samplesToWrite = m_audioOutput->bytesFree() / (CHANNELS*AUDIO_SAMPLE_BITS/8);
124 if (samplesToWrite > m_sendBufferSize) samplesToWrite = m_sendBufferSize;
125 if (samplesToWrite<=0) return;
126 int mixedSamples = m_source->pullAudio( m_sendBuffer, samplesToWrite );
127 m_outTarget->write( (char*)m_sendBuffer, mixedSamples*2 );
132 void AudioOut::run() {
133 if (!m_source) { m_runstate=2; return; }
134 int sleepTime = m_sendBufferSize * 340 / AUDIO_FREQUENCY;
135 if (sleepTime<2) sleepTime = 2;
137 while (m_runstate==0) {