1 files changed, 98 insertions, 0 deletions
diff --git a/src/plugins/Effect/crossfade/crossfadeplugin.cpp b/src/plugins/Effect/crossfade/crossfadeplugin.cpp
new file mode 100644
index 000000000..b937dd51b
--- /dev/null
+++ b/src/plugins/Effect/crossfade/crossfadeplugin.cpp
@@ -0,0 +1,98 @@
+/***************************************************************************
+ *   Copyright (C) 2009 by Ilya Kotov <forkotov02@hotmail.ru>              *
+ *   Copyright (C) 2009 by Sebastian Pipping <sebastian@pipping.org>       *
+ *                                                                         *
+ *   This program 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.                                   *
+ *                                                                         *
+ *   This program 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 this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
+#include <QSettings>
+#include <qmmp/qmmp.h>
+#include <qmmp/statehandler.h>
+#include <qmmp/soundcore.h>
+#include "crossfadeplugin.h"
+
+CrossfadePlugin::CrossfadePlugin() : Effect()
+{
+    m_buffer = 0;
+    m_buffer_at = 0;
+    m_buffer_size = 0;
+    m_core = SoundCore::instance() ;
+    m_handler = StateHandler::instance();
+    m_state = WAITING;
+    QSettings settings(Qmmp::configFile(), QSettings::IniFormat);
+    m_overlap = settings.value("Crossfade/overlap", 6000).toLongLong();
+}
+
+CrossfadePlugin::~CrossfadePlugin()
+{
+    if(m_buffer)
+        free(m_buffer);
+}
+
+void CrossfadePlugin::applyEffect(Buffer *b)
+{
+    switch (m_state)
+    {
+    case WAITING:
+        if(m_core->totalTime() - m_handler->elapsed() < m_overlap + 2000)
+        {
+            StateHandler::instance()->sendNextTrackRequest();
+            m_state = PREPARING;
+        }
+        return;
+    case PREPARING:
+        if(m_core->totalTime() - m_handler->elapsed() <  m_overlap)
+        {
+            if(m_buffer_at + b->nbytes > m_buffer_size)
+            {
+                m_buffer_size = m_buffer_at + b->nbytes;
+                m_buffer = (uchar *)realloc(m_buffer, m_buffer_size);
+            }
+            memcpy(m_buffer + m_buffer_at, b->data, b->nbytes);
+            m_buffer_at += b->nbytes;
+            b->nbytes = 0;
+            return;
+        }
+        else if(m_buffer_at > 0)
+            m_state = PROCESSING;
+        else
+            return;
+    case PROCESSING:
+        if (m_buffer_at > 0)
+        {
+            double volume = (double)m_buffer_at/m_buffer_size;
+            uint size = qMin((ulong)m_buffer_at, b->nbytes);
+            for (uint i = 0; i < size / 2; i++)
+            {
+                ((short*)b->data)[i] =((short*)b->data)[i]*(1.0 - volume)+((short*)m_buffer)[i]*volume;
+            }
+            m_buffer_at -= size;
+            memmove(m_buffer, m_buffer + size, m_buffer_at);
+        }
+        else
+            m_state = WAITING;
+    default:
+        ;
+    }
+    return;
+}
+
+void CrossfadePlugin::configure(quint32 freq, int chan, Qmmp::AudioFormat format)
+{
+    //m_buffer_size = m_overlap * freq * chan * AudioParameters::sampleSize(format) / 1000;
+    //m_buffer =(uchar *) malloc(m_buffer_size);
+    Effect::configure(freq, chan, format);
+}