Clementine-audio-player-Mac.../src/engines/enginebase.cpp

104 lines
3.0 KiB
C++

/* This file is part of Clementine.
Copyright 2010, David Sansome <me@davidsansome.com>
Clementine 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.
Clementine 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 Clementine. If not, see <http://www.gnu.org/licenses/>.
*/
//Copyright: (C) 2003 Mark Kretschmann
// (C) 2004,2005 Max Howell, <max.howell@methylblue.com>
//License: See COPYING
#include "enginebase.h"
#include "core/timeconstants.h"
#include <cmath>
#include <QSettings>
const char* Engine::Base::kSettingsGroup = "Player";
Engine::Base::Base()
: volume_(50),
beginning_nanosec_(0),
end_nanosec_(0),
scope_(kScopeSize),
fadeout_enabled_(true),
fadeout_duration_nanosec_(2 * kNsecPerSec), // 2s
crossfade_enabled_(true),
autocrossfade_enabled_(false),
crossfade_same_album_(false),
next_background_stream_id_(0),
about_to_end_emitted_(false)
{
}
Engine::Base::~Base() {
}
bool Engine::Base::Load(const QUrl& url, TrackChangeFlags,
bool force_stop_at_end,
quint64 beginning_nanosec, qint64 end_nanosec) {
Q_UNUSED(force_stop_at_end);
url_ = url;
beginning_nanosec_ = beginning_nanosec;
end_nanosec_ = end_nanosec;
about_to_end_emitted_ = false;
return true;
}
void Engine::Base::SetVolume(uint value) {
volume_ = value;
SetVolumeSW(MakeVolumeLogarithmic(value));
}
uint Engine::Base::MakeVolumeLogarithmic(uint volume) {
// We're using a logarithmic function to make the volume ramp more natural.
return static_cast<uint>( 100 - 100.0 * std::log10( ( 100 - volume ) * 0.09 + 1.0 ) );
}
void Engine::Base::ReloadSettings() {
QSettings s;
s.beginGroup(kSettingsGroup);
fadeout_enabled_ = s.value("FadeoutEnabled", true).toBool();
fadeout_duration_nanosec_ = s.value("FadeoutDuration", 2000).toLongLong() * kNsecPerMsec;
crossfade_enabled_ = s.value("CrossfadeEnabled", true).toBool();
autocrossfade_enabled_ = s.value("AutoCrossfadeEnabled", false).toBool();
crossfade_same_album_ = !s.value("NoCrossfadeSameAlbum", true).toBool();
}
void Engine::Base::EmitAboutToEnd() {
if (about_to_end_emitted_)
return;
about_to_end_emitted_ = true;
emit TrackAboutToEnd();
}
int Engine::Base::AddBackgroundStream(const QUrl& url) {
return -1;
}
bool Engine::Base::Play(const QUrl& u, TrackChangeFlags c,
bool force_stop_at_end,
quint64 beginning_nanosec, qint64 end_nanosec) {
if (!Load(u, c, force_stop_at_end, beginning_nanosec, end_nanosec))
return false;
return Play(0);
}