FCD Pro+ plugin: non ALSA classes to handle FCD audio for Windows build

2026-06-04 15:04:38 -04:00 · 2016-03-29 03:17:59 +02:00
parent bf9e5c6d15
commit 989feb9108
7 changed files with 616 additions and 4 deletions
@@ -0,0 +1,145 @@
+///////////////////////////////////////////////////////////////////////////////////
+// Copyright (C) 2016 Edouard Griffiths, F4EXB                                   //
+//                                                                               //
+// This program is free software; you can redistribute it and/or modify          //
+// it under the terms of the GNU General Public License as published by          //
+// the Free Software Foundation as version 3 of the License, or                  //
+//                                                                               //
+// This program is distributed in the hope that it will be useful,               //
+// but WITHOUT ANY WARRANTY; without even the implied warranty of                //
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                  //
+// GNU General Public License V3 for more details.                               //
+//                                                                               //
+// You should have received a copy of the GNU General Public License             //
+// along with this program. If not, see <http://www.gnu.org/licenses/>.          //
+///////////////////////////////////////////////////////////////////////////////////
+
+#include <QDebug>
+#include <QAudio>
+#include <QAudioDeviceInfo>
+#include <QAudioInput>
+#include <QAudioFormat>
+#include <QIODevice>
+#include <QList>
+
+#include <stdio.h>
+#include <errno.h>
+#include "dsp/samplefifo.h"
+#include "fcdproplusreader.h"
+#include "fcdtraits.h"
+
+FCDProPlusReader::FCDProPlusReader(SampleFifo* sampleFifo, QObject* parent) :
+	QObject(parent),
+	m_fcdAudioInput(0),
+	m_fcdInput(0),
+	m_running(false),
+	m_convertBuffer(fcd_traits<ProPlus>::convBufSize),
+	m_fcdBuffer(fcd_traits<ProPlus>::fcdBufSize, 0),
+	m_sampleFifo(sampleFifo)
+{
+}
+
+FCDProPlusReader::~FCDProPlusReader()
+{
+	if (m_fcdAudioInput) {
+		delete m_fcdAudioInput;
+	}
+}
+
+void FCDProPlusReader::startWork()
+{
+	QList<QAudioDeviceInfo> audioDevices = QAudioDeviceInfo::availableDevices(QAudio::AudioInput);
+
+	QList<QAudioDeviceInfo>::iterator audioDeviceIt, fcdDeviceIt = audioDevices.end();
+
+	for (audioDeviceIt = audioDevices.begin(); audioDeviceIt != audioDevices.end(); ++audioDeviceIt)
+	{
+		QAudioFormat fcdAudioFormat = audioDeviceIt->preferredFormat();
+		int sampleRate = fcdAudioFormat.sampleRate();
+		int sampleBits = fcdAudioFormat.sampleSize();
+
+		if ((sampleRate == 192000) && (sampleBits == 16))
+		{
+			qDebug() << "FCDProPlusReader::startWork: found: " << audioDeviceIt->deviceName()
+				<< " sampleRate: " << fcdAudioFormat.sampleRate()
+				<< " sampleBits: " << fcdAudioFormat.sampleSize();
+			fcdDeviceIt = audioDeviceIt;
+			break;
+		}
+	}
+
+	if (fcdDeviceIt == audioDevices.end())
+	{
+		qCritical() << "FCDProPlusReader::startWork: FCD Pro+ sound card not found";
+		return;
+	}
+
+	openFcdAudio(*fcdDeviceIt);
+
+	if (!m_fcdAudioInput)
+	{
+		qCritical() << "FCDProPlusReader::startWork: cannot open FCD Pro+ sound card";
+		return;
+	}
+
+	m_fcdAudioInput->stop();
+	m_fcdInput  = m_fcdAudioInput->start();
+
+	if (!m_fcdInput)
+	{
+		qCritical() << "FCDProPlusReader::startWork: cannot start FCD Pro+ sound card";
+		return;
+	}
+
+	connect(m_fcdInput, SIGNAL(readyRead()), this, SLOT(readFcdAudio()));
+	m_running = true;
+
+	qDebug() << "FCDProPlusReader::startWork: started";
+}
+
+void FCDProPlusReader::stopWork()
+{
+	m_running = false;
+	disconnect(m_fcdInput, SIGNAL(readyRead()), this, SLOT(readFcdAudio()));
+	m_fcdAudioInput->stop();
+
+	qDebug() << "FCDProPlusReader::stopWork: stopped";
+}
+
+void FCDProPlusReader::openFcdAudio(const QAudioDeviceInfo& fcdAudioDeviceInfo)
+{
+	QAudioFormat fcdAudioFormat = fcdAudioDeviceInfo.preferredFormat();
+
+	qDebug() << "FCDProPlusReader::openFcdAudio: device: " << fcdAudioDeviceInfo.deviceName()
+		<< " sampleRate: " << fcdAudioFormat.sampleRate()
+		<< " sampleBits: " << fcdAudioFormat.sampleSize();
+
+	m_fcdAudioInput = new QAudioInput(fcdAudioDeviceInfo, fcdAudioFormat, this);
+	//m_fcdAudioInput->setBufferSize(1<<14);
+	//m_fcdAudioInput->setNotifyInterval(50);
+}
+
+void FCDProPlusReader::readFcdAudio()
+{
+    if (!m_fcdAudioInput) {
+        return;
+    }
+
+    int len = m_fcdAudioInput->bytesReady();
+
+//    qDebug() << "FCDProPlusReader::readFcdAudio:"
+//		<< " buffer size: " << m_fcdAudioInput->bufferSize()
+//		<< " interval: " << m_fcdAudioInput->notifyInterval()
+//    	<< " len: " << len;
+
+    if (len > fcd_traits<ProPlus>::fcdBufSize) {
+        len = fcd_traits<ProPlus>::fcdBufSize;
+    }
+
+    int readLen = m_fcdInput->read(m_fcdBuffer.data(), len);
+
+    if (readLen > 0) {
+    	m_sampleFifo->write((const quint8*) m_fcdBuffer.constData(), (uint) readLen);
+    }
+}
+