summaryrefslogtreecommitdiff
path: root/drumgizmo/output/jackaudio.cc
blob: 634b7d1afd9531ba560d84e915c7bc58e054608a (plain)
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
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            jackaudio.cc
 *
 *  Fr 22. Jan 09:43:30 CET 2016
 *  Copyright 2016 Christian Glöckner
 *  cgloeckner@freenet.de
 ****************************************************************************/

/*
 *  This file is part of DrumGizmo.
 *
 *  DrumGizmo 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.
 *
 *  DrumGizmo 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 DrumGizmo; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#include <cassert>
#include <iostream>

#include "jackaudio.h"

JackAudioOutputEngine::JackAudioOutputEngine(JackClient& client)
	: client(client) // wanna use initializer braces here but jenkins fails
	, channels{}
	, sema{"jackaudio"} {
	client.add(*this);
}

JackAudioOutputEngine::~JackAudioOutputEngine() {
	client.remove(*this);
}

bool JackAudioOutputEngine::init(Channels data) {
	channels.clear();
	channels.reserve(data.size());
	auto i = 0u;
	auto const buffer_size = getBufferSize();
	
	for (auto const & elem: data) {
		auto name = std::to_string(i) + "-" + elem.name;
		// initialize new channel
		channels.emplace_back(client, name, buffer_size);
		
		if (channels.back().port == nullptr) {
			std::cerr << "[JackAudioOutputEngine] Cannot create jack "
				<< "port for channel #" << i << "\n";
			return false;
		}
		++i;
	}
	return true;
}

void JackAudioOutputEngine::setParm(std::string parm, std::string value) {
}

bool JackAudioOutputEngine::start() {
	client.activate();
	return true;
}

void JackAudioOutputEngine::stop() {
}

void JackAudioOutputEngine::pre(size_t nsamples) {
}

void JackAudioOutputEngine::run(int ch, sample_t* samples, size_t nsamples) {
	for (auto i = 0u; i < nsamples; ++i) {
		channels[ch].samples[i] = samples[i];
	}
}

void JackAudioOutputEngine::post(size_t nsamples) {
	sema.wait();
}

void JackAudioOutputEngine::process(jack_nframes_t num_frames) {
	assert(num_frames == getBufferSize());
	
	for (auto& channel: channels) {
		auto ptr = static_cast<jack_default_audio_sample_t*>(
			jack_port_get_buffer(channel.port, num_frames));
		for (auto i = 0u; i < num_frames; ++i) {
			ptr[i] = channel.samples[i];
		}
	}
	sema.post();
}

size_t JackAudioOutputEngine::getBufferSize() {
	return client.getBufferSize();
}

size_t JackAudioOutputEngine::samplerate() {
	return client.getSampleRate();
}

JackAudioOutputEngine::Channel::Channel(JackClient& client, std::string const & name, std::size_t buffer_size)
	: port{client, name, JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0}
	, samples{} {
	samples.resize(buffer_size);
}