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[AFV] Select audio device based on situational need

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For AFV itself, a low latency device is required (which on Windows most likely will pick WASAPI).
For notifications and effects, the most compatible device is required (which on Windows will most likely fall back to QWindowsAudio).
This commit is contained in:
Roland Rossgotterer
2019-10-02 17:09:15 +02:00
committed by Mat Sutcliffe
parent 18ec101391
commit 90e87835fc
5 changed files with 119 additions and 95 deletions
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98
src/blacksound/audioutilities.cpp
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@@ -7,6 +7,10 @@
*/
#include "audioutilities.h"
#include <QAudioInput>
#include <QAudioOutput>
using namespace BlackMisc::Audio;
namespace BlackSound
{
@@ -76,4 +80,98 @@ namespace BlackSound
return output;
}
QAudioDeviceInfo getLowestLatencyDevice(const CAudioDeviceInfo &device, QAudioFormat &format)
{
if (device.isDefault())
{
if (device.getType() == CAudioDeviceInfo::InputDevice) { return QAudioDeviceInfo::defaultInputDevice(); }
else { return QAudioDeviceInfo::defaultOutputDevice(); }
}
QAudio::Mode mode = device.getType() == CAudioDeviceInfo::InputDevice ? QAudio::AudioInput : QAudio::AudioOutput;
const QList<QAudioDeviceInfo> allQtDevices = QAudioDeviceInfo::availableDevices(mode);
// Find the one with lowest latency.
QList<QAudioDeviceInfo> supportedDevices;
for (const QAudioDeviceInfo &d : allQtDevices)
{
if (d.deviceName() == device.getName())
{
if (! d.isFormatSupported(format))
{
// Check whether the nearest format is acceptable for our needs
QAudioFormat nearestFormat = d.nearestFormat(format);
if (nearestFormat.sampleRate() != format.sampleRate() ||
nearestFormat.sampleSize() != format.sampleSize() ||
nearestFormat.sampleType() != format.sampleType() ||
nearestFormat.byteOrder() != format.byteOrder() ||
nearestFormat.codec() != format.codec())
{
continue;
}
}
supportedDevices.push_back(d);
}
}
if (supportedDevices.empty()) { return {}; }
QAudioDeviceInfo deviceWithLowestLatency = supportedDevices.at(0);
if (supportedDevices.size() > 1)
{
QAudioFormat nearestFormat = format;
int lowestBufferSize = std::numeric_limits<int>::max();
for (const QAudioDeviceInfo &d : supportedDevices)
{
int bufferSize = 0;
if (device.getType() == CAudioDeviceInfo::InputDevice)
{
QAudioInput input(d, d.nearestFormat(format));
input.start();
input.stop();
bufferSize = input.bufferSize();
}
else
{
QAudioOutput output(d, d.nearestFormat(format));
output.start();
output.stop();
bufferSize = output.bufferSize();
}
if (bufferSize < lowestBufferSize)
{
deviceWithLowestLatency = d;
nearestFormat = d.nearestFormat(format);
lowestBufferSize = bufferSize;
}
}
format = nearestFormat;
}
return deviceWithLowestLatency;
}
QAudioDeviceInfo getHighestCompatibleOutputDevice(const CAudioDeviceInfo &device, QAudioFormat &format)
{
if (device.isDefault()) { return QAudioDeviceInfo::defaultOutputDevice(); }
const QList<QAudioDeviceInfo> allQtDevices = QAudioDeviceInfo::availableDevices(QAudio::AudioOutput);
QList<QAudioDeviceInfo> supportedDevices;
for (const QAudioDeviceInfo &d : allQtDevices)
{
if (d.deviceName() == device.getName())
{
if (d.isFormatSupported(format))
{
supportedDevices.push_back(d);
}
}
if (supportedDevices.size() > 0) { return supportedDevices.at(0); }
}
return {};
}
} // ns

7
src/blacksound/audioutilities.h
View File

@@ -12,6 +12,9 @@
#define BLACKSOUND_AUDIOUTILITIES_H
#include "blacksound/blacksoundexport.h"
#include "blackmisc/audio/audiodeviceinfo.h"
#include <QAudioDeviceInfo>
#include <QByteArray>
#include <QVector>
@@ -24,6 +27,10 @@ namespace BlackSound
BLACKSOUND_EXPORT QVector<float> convertFromMonoToStereo(const QVector<float> &mono);
BLACKSOUND_EXPORT QVector<qint16> convertFromStereoToMono(const QVector<qint16> &stereo);
BLACKSOUND_EXPORT QVector<float> convertFromShortToFloat(const QVector<qint16> &input);
BLACKSOUND_EXPORT QAudioDeviceInfo getLowestLatencyDevice(const BlackMisc::Audio::CAudioDeviceInfo &device, QAudioFormat &format);
BLACKSOUND_EXPORT QAudioDeviceInfo getHighestCompatibleOutputDevice(const BlackMisc::Audio::CAudioDeviceInfo &device, QAudioFormat &format);
//! @}
} // ns

38
src/blacksound/threadedtonepairplayer.cpp
View File

@@ -8,11 +8,13 @@
#include "threadedtonepairplayer.h"
#include "blackmisc/logmessage.h"
#include "blacksound/audioutilities.h"
#include <QTimer>
using namespace BlackMisc;
using namespace BlackMisc::Audio;
using namespace BlackSound;
namespace BlackSound
{
@@ -38,36 +40,14 @@ namespace BlackSound
{
CLogMessage(this).info(u"CThreadedTonePairPlayer for device '%1'") << m_deviceInfo.getName();
QAudioDeviceInfo selectedDevice;
if (m_deviceInfo.isDefault())
{
selectedDevice = QAudioDeviceInfo::defaultOutputDevice();
}
else
{
// TODO: Add smart algorithm to find the device with exactly supports the audio format below
const QList<QAudioDeviceInfo> outputDevices = QAudioDeviceInfo::availableDevices(QAudio::AudioOutput);
for (const QAudioDeviceInfo &d : outputDevices)
{
if (d.deviceName() == m_deviceInfo.getName())
{
selectedDevice = d;
}
}
}
m_audioFormat.setSampleRate(44100);
m_audioFormat.setChannelCount(1);
m_audioFormat.setSampleSize(16); // 8 or 16 works
m_audioFormat.setCodec("audio/pcm");
m_audioFormat.setByteOrder(QAudioFormat::LittleEndian);
m_audioFormat.setSampleType(QAudioFormat::SignedInt);
QAudioFormat format;
format.setSampleRate(44100);
format.setChannelCount(1);
format.setSampleSize(16); // 8 or 16 works
format.setCodec("audio/pcm");
format.setByteOrder(QAudioFormat::LittleEndian);
format.setSampleType(QAudioFormat::SignedInt);
if (!selectedDevice.isFormatSupported(format))
{
format = selectedDevice.nearestFormat(format);
}
m_audioFormat = format;
QAudioDeviceInfo selectedDevice = getHighestCompatibleOutputDevice(m_deviceInfo, m_audioFormat);
m_audioOutput = new QAudioOutput(selectedDevice, m_audioFormat, this);
connect(m_audioOutput, &QAudioOutput::stateChanged, this, &CThreadedTonePairPlayer::handleStateChanged);
}