added soxr plugin

git-svn-id: http://svn.code.sf.net/p/qmmp-dev/code/trunk/qmmp@5982 90c681e8-e032-0410-971d-27865f9a5e38

1 files changed, 86 insertions, 0 deletions

diff --git a/src/plugins/Effect/soxr/soxresampler.cpp b/src/plugins/Effect/soxr/soxresampler.cpp
new file mode 100644
index 000000000..5bc876160
--- /dev/null
+++ b/src/plugins/Effect/soxr/soxresampler.cpp
@@ -0,0 +1,86 @@
+/***************************************************************************
+ *   Copyright (C) 2016 by Ilya Kotov                                      *
+ *   forkotov02@hotmail.ru                                                 *
+ *                                                                         *
+ *   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.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
+ ***************************************************************************/
+
+#include <QSettings>
+#include <math.h>
+#include <stdlib.h>
+#include <qmmp/qmmp.h>
+#include "soxresampler.h"
+
+SoXResampler::SoXResampler() : Effect()
+{
+    m_soxr = 0;
+    m_out = 0;
+    QSettings settings(Qmmp::configFile(), QSettings::IniFormat);
+    m_overSamplingFs = settings.value("SOXR/sample_rate", 48000).toInt();
+    m_quality = soxr_quality_spec(settings.value("SOXR/quality", SOXR_HQ).toInt(), 0);
+}
+
+SoXResampler::~SoXResampler()
+{
+    freeSoXR();
+}
+
+void SoXResampler::applyEffect(Buffer *b)
+{
+    if(m_soxr && b->samples > 0)
+    {
+        size_t frames = b->samples / channels();
+        size_t done = 0;
+        soxr_process(m_soxr, b->data, frames, 0, m_out, frames, &done);
+
+        b->samples = done * channels();
+        if(b->samples > b->size)
+        {
+            delete [] b->data;
+            b->data = new float[b->samples];
+            b->size = b->samples;
+        }
+
+        memcpy(b->data, m_out, b->samples * sizeof(float));
+    }
+}
+
+void SoXResampler::configure(quint32 freq, ChannelMap map)
+{
+    freeSoXR();
+    if(freq != m_overSamplingFs)
+    {
+        soxr_error_t error = 0;
+        m_soxr = soxr_create(freq, m_overSamplingFs, map.count(), &error, 0, &m_quality, 0);
+        double ratio = (double)m_overSamplingFs/freq;
+        m_out = new float[int(ratio * QMMP_BLOCK_FRAMES * map.count() * 2 + 2)];
+    }
+    Effect::configure(m_overSamplingFs, map);
+}
+
+void SoXResampler::freeSoXR()
+{
+    if(m_soxr)
+    {
+        soxr_delete(m_soxr);
+        m_soxr = 0;
+    }
+    if(m_out)
+    {
+        delete [] m_out;
+        m_out = 0;
+    }
+}