86 lines
2.2 KiB
C++
86 lines
2.2 KiB
C++
#include "audiodevice.h"
|
|
|
|
// Qt includes
|
|
#include <QIODevice>
|
|
#include <QAudioInput>
|
|
|
|
//! private helper to allow QAudioInput to write to a io device
|
|
class AudioDeviceHelper : public QIODevice
|
|
{
|
|
public:
|
|
explicit AudioDeviceHelper(AudioDevice &audioDevice, QObject *parent = nullptr);
|
|
|
|
qint64 readData(char *data, qint64 maxlen) override;
|
|
qint64 writeData(const char *data, qint64 len) override;
|
|
|
|
private:
|
|
AudioDevice &m_audioDevice;
|
|
};
|
|
|
|
class AudioDevice::AudioDevicePrivate {
|
|
public:
|
|
AudioDevicePrivate(AudioDevice &audioDevice, const QAudioDeviceInfo &audioDeviceInfo, const QAudioFormat &format);
|
|
|
|
AudioDeviceHelper helper;
|
|
QAudioInput input;
|
|
};
|
|
|
|
AudioDevice::AudioDevice(QObject *parent) :
|
|
BaseDevice{parent}
|
|
{
|
|
}
|
|
|
|
AudioDevice::~AudioDevice() = default;
|
|
|
|
void AudioDevice::start()
|
|
{
|
|
Q_ASSERT(!running());
|
|
|
|
QAudioFormat format;
|
|
format.setSampleRate(m_samplerate);
|
|
format.setChannelCount(2);
|
|
format.setSampleSize(sizeof(SamplePair::Type) * 8);
|
|
format.setSampleType(QAudioFormat::SignedInt);
|
|
format.setCodec("audio/pcm");
|
|
format.setByteOrder(QAudioFormat::LittleEndian);
|
|
|
|
m_private = std::make_unique<AudioDevicePrivate>(*this, m_device, format);
|
|
m_private->input.start(&m_private->helper);
|
|
//m_private->input.setBufferSize(m_samplerate/m_framerate*sizeof(qint16)*2);
|
|
}
|
|
|
|
void AudioDevice::stop()
|
|
{
|
|
Q_ASSERT(running());
|
|
|
|
m_private = nullptr;
|
|
}
|
|
|
|
AudioDeviceHelper::AudioDeviceHelper(AudioDevice &audioDevice, QObject *parent) :
|
|
QIODevice{parent}, m_audioDevice(audioDevice)
|
|
{
|
|
setOpenMode(QIODevice::WriteOnly);
|
|
}
|
|
|
|
qint64 AudioDeviceHelper::readData(char *data, qint64 maxlen)
|
|
{
|
|
Q_UNUSED(data)
|
|
Q_UNUSED(maxlen)
|
|
qFatal("reading is not allowed!");
|
|
}
|
|
|
|
qint64 AudioDeviceHelper::writeData(const char *data, qint64 len)
|
|
{
|
|
Q_ASSERT(len % sizeof(SamplePair) == 0);
|
|
|
|
m_audioDevice.emitSamples(reinterpret_cast<const SamplePair*>(data),
|
|
reinterpret_cast<const SamplePair*>(data) + (len/sizeof(SamplePair)));
|
|
|
|
return len;
|
|
}
|
|
|
|
AudioDevice::AudioDevicePrivate::AudioDevicePrivate(AudioDevice &audioDevice, const QAudioDeviceInfo &audioDeviceInfo, const QAudioFormat &format) :
|
|
helper{audioDevice}, input{audioDeviceInfo, format}
|
|
{
|
|
}
|