kopia lustrzana https://gitlab.com/eliggett/wfview
419 wiersze
13 KiB
C++
419 wiersze
13 KiB
C++
/*
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This class handles both RX and TX audio, each is created as a seperate instance of the class
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but as the setup/handling if output (RX) and input (TX) devices is so similar I have combined them.
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*/
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#include "audiohandler.h"
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#include "logcategories.h"
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#define MULAW_BIAS 33
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#define MULAW_MAX 0x1fff
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qint8 uLawEncode(qint16 number)
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{
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quint16 mask = 0x1000;
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quint8 sign = 0;
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quint8 position = 12;
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quint8 lsb = 0;
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if (number < 0)
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{
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number = -number;
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sign = 0x80;
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}
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number += MULAW_BIAS;
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if (number > MULAW_MAX)
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{
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number = MULAW_MAX;
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}
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for (; ((number & mask) != mask && position >= 5); mask >>= 1, position--)
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;
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lsb = (number >> (position - 4)) & 0x0f;
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return (~(sign | ((position - 5) << 4) | lsb));
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}
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/*
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qint16 uLawDecode(qint8 number)
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{
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quint8 sign = 0, position = 0;
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qint16 decoded = 0;
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number = ~number;
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if (number & 0x80)
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{
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number &= ~(1 << 7);
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sign = -1;
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}
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position = ((number & 0xF0) >> 4) + 5;
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decoded = ((1 << position) | ((number & 0x0F) << (position - 4))
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| (1 << (position - 5))) - MULAW_BIAS;
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return (sign == 0) ? (decoded) : (-(decoded));
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}
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*/
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qint16 uLawDecode(const quint8 in)
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{
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static const qint16 ulaw_decode[256] = {
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-32124, -31100, -30076, -29052, -28028, -27004, -25980, -24956,
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-23932, -22908, -21884, -20860, -19836, -18812, -17788, -16764,
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-15996, -15484, -14972, -14460, -13948, -13436, -12924, -12412,
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-11900, -11388, -10876, -10364, -9852, -9340, -8828, -8316,
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-7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140,
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-5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092,
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-3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004,
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-2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980,
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-1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436,
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-1372, -1308, -1244, -1180, -1116, -1052, -988, -924,
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-876, -844, -812, -780, -748, -716, -684, -652,
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-620, -588, -556, -524, -492, -460, -428, -396,
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-372, -356, -340, -324, -308, -292, -276, -260,
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-244, -228, -212, -196, -180, -164, -148, -132,
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-120, -112, -104, -96, -88, -80, -72, -64,
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-56, -48, -40, -32, -24, -16, -8, 0,
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32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
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23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
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15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
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11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316,
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7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140,
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5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092,
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3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004,
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2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980,
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1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436,
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1372, 1308, 1244, 1180, 1116, 1052, 988, 924,
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876, 844, 812, 780, 748, 716, 684, 652,
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620, 588, 556, 524, 492, 460, 428, 396,
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372, 356, 340, 324, 308, 292, 276, 260,
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244, 228, 212, 196, 180, 164, 148, 132,
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120, 112, 104, 96, 88, 80, 72, 64,
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56, 48, 40, 32, 24, 16, 8, 0 };
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return ulaw_decode[in];
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}
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audioHandler::audioHandler(QObject* parent) :
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QIODevice(parent),
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isInitialized(false),
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audioOutput(Q_NULLPTR),
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audioInput(Q_NULLPTR),
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isUlaw(false),
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bufferSize(0),
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isInput(0),
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volume(1.0f)
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{
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}
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audioHandler::~audioHandler()
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{
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stop();
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if (audioOutput != Q_NULLPTR) {
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delete audioOutput;
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}
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if (audioInput != Q_NULLPTR) {
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delete audioInput;
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}
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}
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bool audioHandler::init(const quint8 bits, const quint8 channels, const quint16 samplerate, const quint16 buffer, const bool ulaw, const bool isinput)
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{
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if (isInitialized) {
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return false;
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}
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/* Always use 16 bit 48K samples internally*/
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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");
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format.setByteOrder(QAudioFormat::LittleEndian);
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format.setSampleType(QAudioFormat::SignedInt);
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this->bufferSize = buffer;
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this->isUlaw = ulaw;
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this->isInput = isinput;
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this->radioSampleBits = bits;
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this->radioSampleRate = samplerate;
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if (isInput)
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isInitialized = setDevice(QAudioDeviceInfo::defaultInputDevice());
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else
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isInitialized = setDevice(QAudioDeviceInfo::defaultOutputDevice());
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return isInitialized;
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}
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bool audioHandler::setDevice(QAudioDeviceInfo deviceInfo)
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{
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qDebug(logAudio()) << this->metaObject()->className() << ": setDevice() running :" << deviceInfo.deviceName();
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if (!deviceInfo.isFormatSupported(format)) {
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if (deviceInfo.isNull())
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{
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qDebug(logAudio()) << "No audio device was found. You probably need to install libqt5multimedia-plugins.";
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}
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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);
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for (const QAudioDeviceInfo& deviceInfo : deviceInfos)
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{
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qDebug(logAudio()) << "Device name: " << deviceInfo.deviceName();
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qDebug(logAudio()) << "is null (probably not good):" << deviceInfo.isNull();
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qDebug(logAudio()) << "channel count:" << deviceInfo.supportedChannelCounts();
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qDebug(logAudio()) << "byte order:" << deviceInfo.supportedByteOrders();
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qDebug(logAudio()) << "supported codecs:" << deviceInfo.supportedCodecs();
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qDebug(logAudio()) << "sample rates:" << deviceInfo.supportedSampleRates();
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qDebug(logAudio()) << "sample sizes:" << deviceInfo.supportedSampleSizes();
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qDebug(logAudio()) << "sample types:" << deviceInfo.supportedSampleTypes();
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}
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qDebug(logAudio()) << "----- done with audio info -----";
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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);
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}
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this->deviceInfo = deviceInfo;
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this->reinit();
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return true;
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}
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void audioHandler::reinit()
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{
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qDebug(logAudio()) << this->metaObject()->className() << ": reinit() running";
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if (audioOutput && audioOutput->state() != QAudio::StoppedState) {
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this->stop();
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}
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// Calculate the minimum required audio buffer
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// This may need work depending on how it performs on other platforms.
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//int audioBuffer = format.sampleRate() / 10;
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//audioBuffer = audioBuffer * (format.sampleSize() / 8);
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if (this->isInput)
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{
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// (Re)initialize audio input
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if (audioInput != Q_NULLPTR)
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delete audioInput;
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audioInput = new QAudioInput(deviceInfo, format, this);
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//audioInput->setBufferSize(audioBuffer);
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//audioInput->setNotifyInterval(20);
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connect(audioInput, SIGNAL(notify()), SLOT(notified()));
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connect(audioInput, SIGNAL(stateChanged(QAudio::State)), SLOT(stateChanged(QAudio::State)));
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}
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else {
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// (Re)initialize audio output
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if (audioOutput != Q_NULLPTR)
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delete audioOutput;
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audioOutput = Q_NULLPTR;
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audioOutput = new QAudioOutput(deviceInfo, format, this);
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//audioOutput->setBufferSize(audioBuffer);
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connect(audioOutput, SIGNAL(notify()), SLOT(notified()));
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connect(audioOutput, SIGNAL(stateChanged(QAudio::State)), SLOT(stateChanged(QAudio::State)));
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}
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this->start();
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this->flush();
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}
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void audioHandler::start()
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{
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qDebug(logAudio()) << this->metaObject()->className() << ": start() running";
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if ((audioOutput == Q_NULLPTR || audioOutput->state() != QAudio::StoppedState) &&
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(audioInput == Q_NULLPTR || audioInput->state() != QAudio::StoppedState) ) {
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return;
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}
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if (isInput) {
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this->open(QIODevice::WriteOnly | QIODevice::Unbuffered);
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audioInput->start(this);
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}
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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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}
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void audioHandler::setVolume(float volume)
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{
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volume = volume;
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}
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void audioHandler::flush()
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{
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qDebug(logAudio()) << this->metaObject()->className() << ": flush() running";
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this->stop();
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if (isInput) {
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audioInput->reset();
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}
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else {
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audioOutput->reset();
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}
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buffer.clear();
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this->start();
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}
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void audioHandler::stop()
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{
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QMutexLocker locker(&mutex);
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if (audioOutput && audioOutput->state() != QAudio::StoppedState) {
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// Stop audio output
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audioOutput->stop();
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QByteArray ret;
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buffer.clear();
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this->close();
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}
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if (audioInput && audioInput->state() != QAudio::StoppedState) {
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// Stop audio output
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audioInput->stop();
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buffer.clear();
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this->close();
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}
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}
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qint64 audioHandler::readData(char* data, qint64 maxlen)
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{
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// Calculate output length, always full samples
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int outlen = 0;
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if (radioSampleBits == 8)
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{
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// Input buffer is 8bit and output buffer is 16bit
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outlen = qMin(buffer.length(), (int)maxlen / 2);
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for (quint16 f = 0; f < outlen; f++)
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{
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if (isUlaw)
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qToLittleEndian<qint16>(uLawDecode(buffer.at(f)), data + (f * 2));
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else
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qToLittleEndian<qint16>((qint16)(buffer[f] << 8) - 32640, data + (f * 2));
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}
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QMutexLocker locker(&mutex);
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buffer.remove(0, outlen);
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outlen = outlen * 2;
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}
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else if (radioSampleBits == 16) {
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// Just copy it
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outlen = qMin(buffer.length(), (int)maxlen);
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if (outlen % 2 != 0) {
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outlen += 1; // Not sure if this is necessary as we should always have an even number!
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}
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memcpy(data, buffer.data(), outlen);
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QMutexLocker locker(&mutex);
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buffer.remove(0, outlen);
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}
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else {
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qDebug(logAudio()) << "Sample bits MUST be 8 or 16 - got: " << radioSampleBits; // Should never happen?
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}
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return outlen;
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}
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qint64 audioHandler::writeData(const char* data, qint64 len)
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{
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QMutexLocker locker(&mutex);
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if (buffer.length() > bufferSize * 4)
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{
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qWarning() << "writeData() Buffer overflow";
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// buffer.clear(); // Will cause a click!
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}
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if (isUlaw) {
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for (int f = 0; f < len / 2; f++)
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{
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buffer.append((quint8)uLawEncode(qFromLittleEndian<qint16>(data + f * 2)));
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}
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}
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else if (radioSampleBits == 8) {
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for (int f = 0; f < len / 2; f++)
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{
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buffer.append((quint8)(((qFromLittleEndian<qint16>(data + f * 2) >> 8) ^ 0x80) & 0xff));
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}
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}
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else if (radioSampleBits == 16) {
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buffer.append(QByteArray::fromRawData(data, len));
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}
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else {
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qWarning() << "Unsupported number of bits! :" << radioSampleBits;
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}
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if (buffer.size() >= radioSampleBits * 120) {
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chunkAvailable = true;
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}
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return (len); // Always return the same number as we received
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}
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qint64 audioHandler::bytesAvailable() const
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{
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return buffer.length() + QIODevice::bytesAvailable();
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}
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bool audioHandler::isSequential() const
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{
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return true;
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}
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void audioHandler::notified()
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{
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}
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void audioHandler::stateChanged(QAudio::State state)
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{
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if (state == QAudio::IdleState && audioOutput->error() == QAudio::UnderrunError) {
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qDebug(logAudio()) << this->metaObject()->className() << "RX:Buffer underrun";
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//if (buffer.length() < bufferSize) {
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// audioOutput->suspend();
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//}
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}
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//qDebug(logAudio()) << this->metaObject()->className() << ": state = " << state;
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}
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void audioHandler::incomingAudio(const QByteArray& data)
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{
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//qDebug(logAudio()) << "Got " << data.length() << " samples";
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if (audioOutput != Q_NULLPTR && audioOutput->state() != QAudio::StoppedState) {
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QMutexLocker locker(&mutex);
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buffer.append(data);
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if (audioOutput->state() == QAudio::SuspendedState) {
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qDebug(logAudio()) << "RX Audio Suspended, Resuming...";
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audioOutput->resume();
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}
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}
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}
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void audioHandler::changeBufferSize(const quint16 newSize)
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{
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QMutexLocker locker(&mutex);
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qDebug(logAudio()) << this->metaObject()->className() << ": Changing buffer size to: " << newSize << " from " << bufferSize;
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bufferSize = newSize;
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}
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void audioHandler::getBufferSize()
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{
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emit sendBufferSize(audioOutput->bufferSize());
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}
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bool audioHandler::isChunkAvailable()
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{
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return chunkAvailable;
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}
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void audioHandler::getNextAudioChunk(QByteArray& ret)
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{
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quint16 numSamples = radioSampleBits * 120;
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if (buffer.size() >= numSamples) {
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QMutexLocker locker(&mutex);
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ret.append(buffer.mid(0, numSamples));
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buffer.remove(0, numSamples);
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}
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if (buffer.size() < numSamples)
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{
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chunkAvailable = false;
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}
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return;
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}
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