Support for using jack midi input (#2038)

* Support jack midi input

* If jack is used for audio then use the same connection for midi as well

* Remove old FreeBSD adjustment for portaudio as multiple version support has been dropped.

* Disable jack midi out port until it is functional

CMakeLists.txt

@@ -589,6 +589,7 @@ MESSAGE(
 "* ALSA                        : ${STATUS_ALSA}\n"
 "* OSS                         : ${STATUS_OSS}\n"
 "* Sndio                       : ${STATUS_SNDIO}\n"
+"* JACK                        : ${STATUS_JACK}\n"
 "* WinMM                       : ${STATUS_WINMM}\n"
 "* AppleMidi                   : ${STATUS_APPLEMIDI}\n"
 )

include/AudioJack.h

@@ -37,9 +37,9 @@
 #include "AudioDevice.h"
 #include "AudioDeviceSetupWidget.h"
 
-
 class QLineEdit;
 class LcdSpinBox;
+class MidiJack;
 
 
 class AudioJack : public QObject, public AudioDevice
@@ -49,6 +49,12 @@ class AudioJack : public QObject, public AudioDevice
 	AudioJack( bool & _success_ful, Mixer* mixer );
 	virtual ~AudioJack();
 
+	// this is to allow the jack midi connection to use the same jack client connection
+	// the jack callback is handled here, we call the midi client so that it can read
+	// it's midi data during the callback
+	AudioJack * addMidiClient(MidiJack *midiClient);
+	jack_client_t * jackClient() {return m_client;};
+
 	inline static QString name()
 	{
 		return QT_TRANSLATE_NOOP( "setupWidget",
@@ -98,6 +104,7 @@ private slots:
 	bool m_active;
 	bool m_stopped;
 
+	MidiJack *m_midiClient;
 	QVector<jack_port_t *> m_outputPorts;
 	jack_default_audio_sample_t * * m_tempOutBufs;
 	surroundSampleFrame * m_outBuf;

include/AudioPortAudio.h

@@ -45,11 +45,7 @@ public slots:
 
 #ifdef LMMS_HAVE_PORTAUDIO
 
-#if defined(__FreeBSD__)
-#include <portaudio2/portaudio.h>
-#else
 #include <portaudio.h>
-#endif
 
 #include <QtCore/QSemaphore>
 

include/MidiJack.h

@@ -0,0 +1,95 @@
+/*
+ * MidiJack.h - MIDI client for Jack
+ *
+ * Copyright (c) 2015 Shane Ambler <develop/at/shaneware.biz>
+ *
+ * This file is part of LMMS - http://lmms.io
+ *
+ * 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; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+#ifndef MIDIJACK_H
+#define MIDIJACK_H
+
+#include "lmmsconfig.h"
+
+#ifdef LMMS_HAVE_JACK
+#include <jack/jack.h>
+#include <jack/midiport.h>
+
+#include <QtCore/QThread>
+#include <QMutex>
+#include <QtCore/QFile>
+
+#include "MidiClient.h"
+#include "AudioJack.h"
+
+#define	JACK_MIDI_BUFFER_MAX 64 /* events */
+
+class QLineEdit;
+
+class MidiJack : public MidiClientRaw, public QThread
+{
+public:
+	MidiJack();
+	virtual ~MidiJack();
+
+	jack_client_t* jackClient();
+
+	static QString probeDevice();
+
+	inline static QString name()
+	{
+		return( QT_TRANSLATE_NOOP( "MidiSetupWidget",
+			"Jack-MIDI" ) );
+	}
+
+	void JackMidiWrite(jack_nframes_t nframes);
+	void JackMidiRead(jack_nframes_t nframes);
+
+
+	inline static QString configSection()
+	{
+		return "MidiJack";
+	}
+
+
+protected:
+	virtual void sendByte( const unsigned char c );
+	virtual void run();
+
+
+private:
+	AudioJack *m_jackAudio;
+	jack_client_t *m_jackClient;
+	jack_port_t *m_input_port;
+	jack_port_t *m_output_port;
+	uint8_t m_jack_buffer[JACK_MIDI_BUFFER_MAX * 4];
+
+	void JackMidiOutEvent(uint8_t *buf, uint8_t len);
+	void lock();
+	void unlock();
+
+	void getPortInfo( const QString& sPortName, int& nClient, int& nPort );
+
+	volatile bool m_quit;
+
+};
+
+#endif // LMMS_HAVE_JACK
+
+#endif // MIDIJACK_H

src/core/CMakeLists.txt

@@ -84,6 +84,7 @@ set(LMMS_SRCS
 	core/midi/MidiAlsaSeq.cpp
 	core/midi/MidiClient.cpp
 	core/midi/MidiController.cpp
+	core/midi/MidiJack.cpp
 	core/midi/MidiOss.cpp
 	core/midi/MidiSndio.cpp
 	core/midi/MidiApple.cpp

src/core/Mixer.cpp

@@ -50,6 +50,7 @@
 // platform-specific midi-interface-classes
 #include "MidiAlsaRaw.h"
 #include "MidiAlsaSeq.h"
+#include "MidiJack.h"
 #include "MidiOss.h"
 #include "MidiSndio.h"
 #include "MidiWinMM.h"
@@ -975,6 +976,19 @@ MidiClient * Mixer::tryMidiClients()
 	}
 #endif
 
+#ifdef LMMS_HAVE_JACK
+	if( client_name == MidiJack::name() || client_name == "" )
+	{
+		MidiJack * mjack = new MidiJack;
+		if( mjack->isRunning() )
+		{
+			m_midiClientName = MidiJack::name();
+			return mjack;
+		}
+		delete mjack;
+	}
+#endif
+
 #ifdef LMMS_HAVE_OSS
 	if( client_name == MidiOss::name() || client_name == "" )
 	{

src/core/audio/AudioJack.cpp

@@ -41,7 +41,7 @@
 #include "AudioPort.h"
 #include "MainWindow.h"
 #include "Mixer.h"
-
+#include "MidiJack.h"
 
 
 
@@ -52,6 +52,7 @@ AudioJack::AudioJack( bool & _success_ful, Mixer*  _mixer ) :
 								_mixer ),
 	m_client( NULL ),
 	m_active( false ),
+	m_midiClient( NULL ),
 	m_tempOutBufs( new jack_default_audio_sample_t *[channels()] ),
 	m_outBuf( new surroundSampleFrame[mixer()->framesPerPeriod()] ),
 	m_framesDoneInCurBuf( 0 ),
@@ -123,7 +124,15 @@ void AudioJack::restartAfterZombified()
 
 
 
+AudioJack* AudioJack::addMidiClient(MidiJack *midiClient)
+{
+	if( m_client == NULL )
+		return NULL;
+
+	m_midiClient = midiClient;
 
+	return this;
+}
 
 bool AudioJack::initJackClient()
 {
@@ -331,6 +340,14 @@ void AudioJack::renamePort( AudioPort * _port )
 
 int AudioJack::processCallback( jack_nframes_t _nframes, void * _udata )
 {
+	// do midi processing first so that midi input can
+	// add to the following sound processing
+	if( m_midiClient && _nframes > 0 )
+	{
+		m_midiClient->JackMidiRead(_nframes);
+		m_midiClient->JackMidiWrite(_nframes);
+	}
+
 	for( int c = 0; c < channels(); ++c )
 	{
 		m_tempOutBufs[c] =