AutoMate/jack.cpp at master · harryhaaren/AutoMate · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124

/*	Program AutoMate: A musical automation tool
	Author: Harry van Haaren
	E-mail: harryhaaren@gmail.com
	Copyright (C) 2010 Harry van Haaren

	AutoMate 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 3 of the License, or
	(at your option) any later version.

	AutoMate 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 AutoMate.  If not, see <http://www.gnu.org/licenses/>. */

#include "jack.hpp"

Jack::Jack()
{
	bpm = 120.0;

	std::cout << "Creating Jack Client..." << std::flush;

	if ((client = jack_client_open("AutoMate", JackNullOption, NULL)) == 0)
	{
		std::cout << "\nError: could not create client.\tJACK Server not running?" << std::endl;
	}

	inputPort  = jack_port_register (client, "midi_in", JACK_DEFAULT_MIDI_TYPE, JackPortIsInput, 0);
	outputPort = jack_port_register (client, "midi_out",JACK_DEFAULT_MIDI_TYPE, JackPortIsOutput, 0);

	jack_set_process_callback (client, staticProcess, static_cast<void*>(this));

	std::cout << "\t\t\tDone!" << std::endl;

}

Jack::~Jack()
{
}

void Jack::setTrackVector(AutomationTrack* array)
{
	// keep a copy of array's address
	arrayPointer = array;
}

void Jack::activate()
{
	std::cout << "Activating JACK client..." << std::flush;

	if (jack_activate(client))
	{
		std::cout <<  "Cannot activate client" << std::endl;
		exit(1);
	}
	std::cout << "\t\tDone!" << std::endl;
}

int Jack::staticProcess(jack_nframes_t nframes, void *arg)
{
	return static_cast<Jack*>(arg)->process(nframes);
}

int Jack::process(jack_nframes_t nframes)
{

	jack_position_t			positionQuery;
	jack_transport_state_t	transportQuery;

	// get output port buffers
	void* out_port_buf = jack_port_get_buffer( outputPort, nframes);
	unsigned char* buffer;
	jack_midi_clear_buffer(out_port_buf);

	transportQuery 			= jack_transport_query ( client, &positionQuery );
	jack_nframes_t frame	= jack_get_sample_rate ( client );


	/*
	// if transport rolling
	if( (transportQuery & JackTransportRolling) && (positionQuery.valid & JackPositionBBT) && (positionQuery.tick == 0) )
	{
		buffer = jack_midi_event_reserve(out_port_buf, 0, 3);

		/*
		// write note on
		buffer[0] = 144;	// note on
		buffer[1] = 60;		// which note
		buffer[2] = 127;	// velocity
		*
	}
	*/

	// update the widget regardless of if its active or not
	if(transportQuery & JackTransportRolling)
		for (int i = 0; i < 4; i++)
			arrayPointer[i].setTime( transportQuery, positionQuery );


	if(transportQuery & JackTransportRolling && (positionQuery.valid & JackPositionBBT) && (positionQuery.tick % 100 == 0))
	{
		// For testing only one track, insert 1 instead of 4
		for (int i = 0; i < 4; i++)
		{
			// check if the thing is "enabled" or "active"
			if( arrayPointer[i].getActive() )
			{
				buffer = jack_midi_event_reserve(out_port_buf, 0, 3);

				// write CC change
				buffer[0] = 144 + arrayPointer[i].getChannel();
				buffer[1] = arrayPointer[i].getCC();
				buffer[2] = arrayPointer[i].getValue() * 127;
			}
		}
	}

	return 0;
}