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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            jackclient.cc
 *
 *  Sun Jul 20 21:48:44 CEST 2008
 *  Copyright 2008 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  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 "jackclient.h"

JackProcess::~JackProcess() {
}

// --------------------------------------------------------------------

JackChannel::JackChannel()
	: samples{}
	, client{nullptr}
	, port{nullptr} {
}

JackChannel::JackChannel(JackClient& client, std::size_t buffer_size,
	std::string const & name)
	: samples{}
	, client{client.client}
	// register jack port for given client
	, port{jack_port_register(this->client, name.c_str(),
		JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0)} {
	samples.resize(buffer_size);
}

JackChannel::~JackChannel() {
	if (port != nullptr) {
		assert(client != nullptr);
		jack_port_unregister(client, port);
	}
}

// --------------------------------------------------------------------

int _wrap_jack_process(jack_nframes_t nframes, void* arg){
	return static_cast<JackClient*>(arg)->process(nframes);
}

JackClient::JackClient()
	: client{nullptr}
	, processes{}
	, is_active{false} {
	jack_status_t status;
	client = jack_client_open("DrumGizmo", JackNullOption, &status);
	jack_set_process_callback(client, _wrap_jack_process, this);
}

JackClient::~JackClient() {
	if (client != nullptr) {
		jack_client_close(client);
	}
}

void JackClient::add(JackProcess& process) {
	processes.insert(&process);
}

void JackClient::remove(JackProcess& process) {
	processes.erase(&process);
}

void JackClient::activate() {
	if (!is_active) {
		jack_activate(client);
	}
	is_active = true;
}

int JackClient::process(jack_nframes_t num_frames) {
	for (auto& ptr: processes) {
		ptr->process(num_frames);
	}
	return 0;
}

std::size_t JackClient::getBufferSize() const {
	return jack_get_buffer_size(client);
}

std::size_t JackClient::getSampleRate() const {
	return jack_get_sample_rate(client);
}