wfview/audiohandler.cpp

1212 wiersze
65 KiB
C++
Czysty Zwykły widok Historia

2021-02-11 19:18:35 +00:00
/*
This class handles both RX and TX audio, each is created as a seperate instance of the class
but as the setup/handling if output (RX) and input (TX) devices is so similar I have combined them.
*/
#include "audiohandler.h"
2021-02-23 21:21:22 +00:00
#include "logcategories.h"
2021-02-11 19:18:35 +00:00
2021-02-13 00:45:59 +00:00
#define MULAW_BIAS 33
#define MULAW_MAX 0x1fff
static unsigned char ulaw_encode[8193] =
{ 0xff, 0xfe, 0xfe, 0xfd, 0xfd, 0xfc, 0xfc, 0xfb, 0xfb, 0xfa, 0xfa, 0xf9,
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0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x83, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x82, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81,
0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x81, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80
};
static const qint16 ulaw_decode[256] = {
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-32124, -31100, -30076, -29052, -28028, -27004, -25980, -24956,
-23932, -22908, -21884, -20860, -19836, -18812, -17788, -16764,
-15996, -15484, -14972, -14460, -13948, -13436, -12924, -12412,
-11900, -11388, -10876, -10364, -9852, -9340, -8828, -8316,
-7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140,
-5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092,
-3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004,
-2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980,
-1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436,
-1372, -1308, -1244, -1180, -1116, -1052, -988, -924,
-876, -844, -812, -780, -748, -716, -684, -652,
-620, -588, -556, -524, -492, -460, -428, -396,
-372, -356, -340, -324, -308, -292, -276, -260,
-244, -228, -212, -196, -180, -164, -148, -132,
-120, -112, -104, -96, -88, -80, -72, -64,
-56, -48, -40, -32, -24, -16, -8, 0,
32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316,
7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140,
5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092,
3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004,
2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980,
1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436,
1372, 1308, 1244, 1180, 1116, 1052, 988, 924,
876, 844, 812, 780, 748, 716, 684, 652,
620, 588, 556, 524, 492, 460, 428, 396,
372, 356, 340, 324, 308, 292, 276, 260,
244, 228, 212, 196, 180, 164, 148, 132,
120, 112, 104, 96, 88, 80, 72, 64,
56, 48, 40, 32, 24, 16, 8, 0
};
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audioHandler::audioHandler(QObject* parent) :
QIODevice(parent),
isInitialized(false),
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audioOutput(Q_NULLPTR),
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audioInput(Q_NULLPTR),
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isUlaw(false),
latency(0),
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isInput(0),
chunkAvailable(false)
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{
}
audioHandler::~audioHandler()
{
stop();
if (audioOutput != Q_NULLPTR) {
delete audioOutput;
}
if (audioInput != Q_NULLPTR) {
delete audioInput;
}
}
bool audioHandler::init(const quint8 bits, const quint8 channels, const quint16 samplerate, const quint16 latency, const bool ulaw, const bool isinput, QString port)
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{
if (isInitialized) {
return false;
}
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/* Always use 16 bit 48K samples internally*/
format.setSampleSize(16);
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format.setChannelCount(channels);
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format.setSampleRate(48000);
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format.setCodec("audio/pcm");
format.setByteOrder(QAudioFormat::LittleEndian);
format.setSampleType(QAudioFormat::SignedInt);
this->latency = latency;
this->isUlaw = ulaw;
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this->isInput = isinput;
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this->radioSampleBits = bits;
this->radioSampleRate = samplerate;
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this->chunkSize = this->radioSampleBits * 120;
qDebug(logAudio()) << "Got audio port name: " << port;
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if (isInput) {
const auto deviceInfos = QAudioDeviceInfo::availableDevices(QAudio::AudioInput);
for (const QAudioDeviceInfo& deviceInfo : deviceInfos) {
if (deviceInfo.deviceName() == port) {
qDebug(logAudio()) << "Input Audio Device name: " << deviceInfo.deviceName();
isInitialized = setDevice(deviceInfo);
break;
}
}
if (!isInitialized) {
qDebug(logAudio()) << "Input device " << deviceInfo.deviceName() << " not found, using default";
isInitialized = setDevice(QAudioDeviceInfo::defaultInputDevice());
}
}
else
{
const auto deviceInfos = QAudioDeviceInfo::availableDevices(QAudio::AudioOutput);
for (const QAudioDeviceInfo& deviceInfo : deviceInfos) {
if (deviceInfo.deviceName() == port) {
qDebug(logAudio()) << "Output Audio Device name: " << deviceInfo.deviceName();
isInitialized = setDevice(deviceInfo);
break;
}
}
if (!isInitialized) {
qDebug(logAudio()) << "Output device " << deviceInfo.deviceName() << " not found, using default";
isInitialized = setDevice(QAudioDeviceInfo::defaultOutputDevice());
}
}
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return isInitialized;
}
bool audioHandler::setDevice(QAudioDeviceInfo deviceInfo)
{
bool ret = true;
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qDebug(logAudio()) << this->metaObject()->className() << ": setDevice() running :" << deviceInfo.deviceName();
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if (!deviceInfo.isFormatSupported(format)) {
if (deviceInfo.isNull())
{
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qDebug(logAudio()) << "No audio device was found. You probably need to install libqt5multimedia-plugins.";
ret = false;
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}
else {
/*
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qDebug(logAudio()) << "Audio Devices found: ";
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const auto deviceInfos = QAudioDeviceInfo::availableDevices(QAudio::AudioOutput);
for (const QAudioDeviceInfo& deviceInfo : deviceInfos)
{
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qDebug(logAudio()) << "Device name: " << deviceInfo.deviceName();
qDebug(logAudio()) << "is null (probably not good):" << deviceInfo.isNull();
qDebug(logAudio()) << "channel count:" << deviceInfo.supportedChannelCounts();
qDebug(logAudio()) << "byte order:" << deviceInfo.supportedByteOrders();
qDebug(logAudio()) << "supported codecs:" << deviceInfo.supportedCodecs();
qDebug(logAudio()) << "sample rates:" << deviceInfo.supportedSampleRates();
qDebug(logAudio()) << "sample sizes:" << deviceInfo.supportedSampleSizes();
qDebug(logAudio()) << "sample types:" << deviceInfo.supportedSampleTypes();
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}
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qDebug(logAudio()) << "----- done with audio info -----";
*/
ret=false;
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}
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qDebug(logAudio()) << "Format not supported, choosing nearest supported format - which may not work!";
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deviceInfo.nearestFormat(format);
}
this->deviceInfo = deviceInfo;
this->reinit();
return ret;
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}
void audioHandler::reinit()
{
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qDebug(logAudio()) << this->metaObject()->className() << ": reinit() running";
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if (audioOutput && audioOutput->state() != QAudio::StoppedState) {
this->stop();
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}
if (this->isInput)
{
// (Re)initialize audio input
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if (audioInput != Q_NULLPTR)
delete audioInput;
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audioInput = new QAudioInput(deviceInfo, format, this);
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connect(audioInput, SIGNAL(notify()), SLOT(notified()));
connect(audioInput, SIGNAL(stateChanged(QAudio::State)), SLOT(stateChanged(QAudio::State)));
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}
else {
// (Re)initialize audio output
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if (audioOutput != Q_NULLPTR)
delete audioOutput;
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audioOutput = Q_NULLPTR;
audioOutput = new QAudioOutput(deviceInfo, format, this);
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audioOutput->setBufferSize((radioSampleRate/25)*(radioSampleBits/8)*2);
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connect(audioOutput, SIGNAL(notify()), SLOT(notified()));
connect(audioOutput, SIGNAL(stateChanged(QAudio::State)), SLOT(stateChanged(QAudio::State)));
}
this->start();
this->flush();
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}
void audioHandler::start()
{
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qDebug(logAudio()) << this->metaObject()->className() << ": start() running";
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if ((audioOutput == Q_NULLPTR || audioOutput->state() != QAudio::StoppedState) &&
(audioInput == Q_NULLPTR || audioInput->state() != QAudio::StoppedState) ) {
return;
}
if (isInput) {
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this->open(QIODevice::WriteOnly | QIODevice::Unbuffered);
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audioInput->start(this);
}
else {
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this->open(QIODevice::ReadOnly | QIODevice::Unbuffered);
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audioOutput->start(this);
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}
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}
void audioHandler::flush()
{
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qDebug(logAudio()) << this->metaObject()->className() << ": flush() running";
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this->stop();
if (isInput) {
audioInput->reset();
}
else {
audioOutput->reset();
}
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QMutexLocker locker(&mutex);
audioBuffer.clear();
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this->start();
}
void audioHandler::stop()
{
if (audioOutput && audioOutput->state() != QAudio::StoppedState) {
// Stop audio output
audioOutput->stop();
this->close();
}
if (audioInput && audioInput->state() != QAudio::StoppedState) {
// Stop audio output
audioInput->stop();
this->close();
}
}
qint64 audioHandler::readData(char* data, qint64 maxlen)
{
// Calculate output length, always full samples
int sentlen = 0;
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//qDebug(logAudio()) << "Looking for: " << maxlen << " bytes";
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// We must lock the mutex for the entire time that the buffer may be modified.
QMutexLocker locker(&mutex);
// Get next packet from buffer.
if (!audioBuffer.isEmpty())
{
// Output buffer is ALWAYS 16 bit.
int divisor = 16 / radioSampleBits;
auto packet = audioBuffer.begin();
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while (packet != audioBuffer.end() && sentlen < maxlen)
{
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int timediff = packet->time.msecsTo(QTime::currentTime());
if (timediff > (int)latency * 2) {
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//qDebug(logAudio()) << "Packet " << hex << packet->seq << " arrived too late (increase rx buffer size!) " << dec << packet->time.msecsTo(QTime::currentTime()) << "ms";
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packet = audioBuffer.erase(packet); // returns next packet
}
else if (packet->seq == lastSeq+1 || packet->seq <= lastSeq)
{
lastSeq = packet->seq;
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//qDebug(logAudio()) << "Packet " << hex << packet->seq << " arrived on time " << dec << packet->time.msecsTo(QTime::currentTime()) << "ms";
// Will this packet fit in the current buffer?
int send = qMin((int)((maxlen/divisor) - (sentlen/divisor)), packet->data.length() - packet->sent);
if (divisor == 2)
{
// Input buffer is 8bit and output buffer is 16bit
for (int f = 0; f < send; f++)
{
if (isUlaw)
qToLittleEndian<qint16>(ulaw_decode[(quint8)packet->data[f+packet->sent]], data + (f * 2 + sentlen));
else
qToLittleEndian<qint16>((qint16)(packet->data[f+packet->sent] << 8) - 32640, data + (f * 2 + sentlen));
}
}
else if (divisor == 1)
{
// 16 bit audio so just copy it in place.
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//qDebug(logAudio()) << "Adding packet to buffer:" << (*packet).seq << ": " << (*packet).data.length()-(*packet).sent;
memcpy(data+sentlen, packet->data.constData()+packet->sent, send);
}
else
{
//qDebug(logAudio()) << "Invalid number of bits in audio " << radioSampleBits;
break;
}
sentlen = sentlen + (send * divisor);
if (send == packet->data.length())
{
lastSeq = packet->seq;
packet = audioBuffer.erase(packet); // returns next packet
if (maxlen - sentlen == 0)
{
break;
}
}
else if (send == 0)
{
// We have no more space or no packets so just break.
break;
}
else
{
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// We ended-up with a partial packet left so store where we left off.
packet->sent = send;
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qDebug(logAudio()) << "Packet " << hex << packet->seq << " is partial, sent=" << dec << packet->sent << " sentlen=" << sentlen;
break;
}
} else {
qDebug(logAudio()) << "Missing audio packet(s) from: " << lastSeq + 1 << " to " << packet->seq - 1;
lastSeq = packet->seq;
}
}
}
return sentlen;
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}
qint64 audioHandler::writeData(const char* data, qint64 len)
{
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int multiplier = (int)16 / radioSampleBits;
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qint64 sentlen = 0;
int tosend = 0;
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QMutexLocker locker(&mutex);
audioPacket *current;
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while (sentlen < len) {
if (!audioBuffer.isEmpty())
{
if (audioBuffer.last().sent == chunkSize)
{
audioBuffer.append(audioPacket());
audioBuffer.last().sent = 0;
}
}
else
{
audioBuffer.append(audioPacket());
audioBuffer.last().sent = 0;
}
current = &audioBuffer.last();
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tosend = qMin((int)((len - sentlen)/multiplier), (int)chunkSize-current->sent);
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if (radioSampleBits == 8) {
int f = 0;
while (f < tosend)
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{
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quint8 outdata=0;
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if (isUlaw) {
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qint16 enc = qFromLittleEndian<quint16>(data + ((f * multiplier) + sentlen));
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if (enc >= 0)
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outdata=ulaw_encode[enc];
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else
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outdata=0x7f & ulaw_encode[-enc];
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}
else {
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outdata = (quint8)(((qFromLittleEndian<qint16>((data + ((f * multiplier) + sentlen))) >> 8) ^ 0x80) & 0xff);
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}
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current->data.append((char)outdata);
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f++;
}
}
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else if (radioSampleBits == 16)
{
current->data.append(QByteArray::fromRawData(data + sentlen, tosend ));
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}
sentlen = sentlen + (tosend * multiplier);
current->seq = 0; // Not used in TX
current->time = QTime::currentTime();
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current->sent = current->data.length();
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if (current->sent == chunkSize)
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{
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chunkAvailable = true;
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}
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else if (audioBuffer.length()==1 && current->sent != chunkSize) {
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chunkAvailable = false;
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}
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}
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return (sentlen); // Always return the same number as we received
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}
qint64 audioHandler::bytesAvailable() const
{
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return 0;
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}
bool audioHandler::isSequential() const
{
return true;
}
void audioHandler::notified()
{
}
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void audioHandler::stateChanged(QAudio::State state)
{
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// Process the state
switch (state)
{
case QAudio::IdleState:
{
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qDebug(logAudio()) << "Audio now in idle state: " << audioBuffer.length() << " packets in buffer";
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if (audioOutput->error() == QAudio::UnderrunError)
{
qDebug(logAudio()) << this->metaObject()->className() << "RX:Buffer underrun";
audioOutput->suspend();
}
break;
}
case QAudio::ActiveState:
{
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qDebug(logAudio()) << "Audio now in active state: " << audioBuffer.length() << " packets in buffer";
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break;
}
case QAudio::SuspendedState:
{
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qDebug(logAudio()) << "Audio now in suspended state: " << audioBuffer.length() << " packets in buffer";
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break;
}
case QAudio::StoppedState:
{
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qDebug(logAudio()) << "Audio now in stopped state: " << audioBuffer.length() << " packets in buffer";
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break;
}
default: {
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qDebug(logAudio()) << "Unhandled audio state: " << audioBuffer.length() << " packets in buffer" << state;
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}
}
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}
void audioHandler::incomingAudio(const audioPacket data)
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{
if (audioOutput != Q_NULLPTR && audioOutput->state() != QAudio::StoppedState) {
QMutexLocker locker(&mutex);
audioBuffer.push_back(data);
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// Sort the buffer by seq number. This is important and audio packets may have arrived out-of-order
std::sort(audioBuffer.begin(), audioBuffer.end(),
[](const audioPacket& a, const audioPacket& b) -> bool
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{
return a.seq < b.seq;
});
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// Restart playback
if (audioOutput->state() == QAudio::SuspendedState)
{
qDebug(logAudio()) << "RX Audio Suspended, Resuming...";
audioOutput->resume();
}
}
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}
void audioHandler::changeLatency(const quint16 newSize)
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{
qDebug(logAudio()) << this->metaObject()->className() << ": Changing latency to: " << newSize << " from " << latency;
latency = newSize;
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}
void audioHandler::getLatency()
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{
emit sendLatency(latency);
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}
bool audioHandler::isChunkAvailable()
{
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return (chunkAvailable);
}
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void audioHandler::getNextAudioChunk(QByteArray& ret)
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{
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if (!audioBuffer.isEmpty() && chunkAvailable)
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{
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QMutexLocker locker(&mutex);
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// Skip through audio buffer deleting any old entry.
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auto packet = audioBuffer.begin();
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while (packet != audioBuffer.end())
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{
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if (packet->time.msecsTo(QTime::currentTime()) > 100) {
//qDebug(logAudio()) << "TX Packet too old " << dec << packet->time.msecsTo(QTime::currentTime()) << "ms";
packet = audioBuffer.erase(packet); // returns next packet
}
else {
if (packet->data.length() == chunkSize && ret.length() == 0)
{
ret.append(packet->data);
packet = audioBuffer.erase(packet); // returns next packet
}
else {
packet++;
}
}
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}
}
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return;
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}
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