added missing jackaudio.cc

1 files changed, 106 insertions, 0 deletions

diff --git a/drumgizmo/output/jackaudio.cc b/drumgizmo/output/jackaudio.cc
new file mode 100644
index 0000000..de51086
--- /dev/null
+++ b/drumgizmo/output/jackaudio.cc
@@ -0,0 +1,106 @@
+/* -*- 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}
+	, channels{}
+	, sema{"jackaudio"} {
+	client.add(*this);
+}
+
+JackaudioOutputEngine::~JackaudioOutputEngine() {
+}
+
+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, buffer_size, name);
+		
+		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();
+}