1 files changed, 125 insertions, 0 deletions
diff --git a/src/plugins/Effect/srconverter/srconverter.cpp b/src/plugins/Effect/srconverter/srconverter.cpp
new file mode 100644
index 000000000..0e733c8c4
--- /dev/null
+++ b/src/plugins/Effect/srconverter/srconverter.cpp
@@ -0,0 +1,125 @@
+/***************************************************************************
+ *   Copyright (C) 2007 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.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
+#include <QSettings>
+#include <QDir>
+#include <math.h>
+
+#include "srconverter.h"
+
+SRConverter::SRConverter(QObject* parent) : Effect(parent)
+{
+    m_isSrcAlloc = FALSE;
+    int converter_type_array[] = {SRC_SINC_BEST_QUALITY, SRC_SINC_MEDIUM_QUALITY, SRC_SINC_FASTEST,
+                                  SRC_ZERO_ORDER_HOLD,  SRC_LINEAR};
+    m_srcIn = 0;
+    m_srcOut = 0;
+    m_src_state = 0;
+    m_srcError = 0;
+    QSettings settings(QDir::homePath()+"/.qmmp/qmmprc", QSettings::IniFormat);
+    m_overSamplingFs = settings.value("SRC/sample_rate",48000).toInt();
+    m_converter_type = converter_type_array[settings.value("SRC/engine", 0).toInt()];
+}
+
+SRConverter::~SRConverter()
+{
+    src_reset (m_src_state) ;
+    freeSRC();
+    m_src_data.data_in = 0;
+    m_src_data.data_out = 0;
+    m_src_data.end_of_input = 0;
+    m_src_data.input_frames = 0;
+    m_src_data.output_frames = 0;
+    if (m_isSrcAlloc)
+    {
+        free(m_srcIn);
+        free(m_srcOut);
+        free(m_wOut);
+        m_isSrcAlloc = FALSE;
+    }
+}
+
+const ulong SRConverter::process(char *in_data, const ulong size, char **out_data)
+{
+    if (m_isSrcAlloc)
+    {
+        free(m_srcIn);
+        free(m_srcOut);
+        free(m_wOut);
+        m_isSrcAlloc = FALSE;
+    }
+    ulong wbytes = 0;
+
+    if (m_src_state && size > 0)
+    {
+        int lrLength = size/2;
+        int overLrLength= (int)floor(lrLength*(m_src_data.src_ratio+1));
+        m_srcIn = (float*) malloc(sizeof(float)*lrLength);
+        m_srcOut = (float*) malloc(sizeof(float)*overLrLength);
+        m_wOut = (short int*) malloc(sizeof(short int)*overLrLength);
+        src_short_to_float_array((short int*)in_data, m_srcIn, lrLength);
+        m_isSrcAlloc = TRUE;
+        m_src_data.data_in = m_srcIn;
+        m_src_data.data_out = m_srcOut;
+        m_src_data.end_of_input = 0;
+        m_src_data.input_frames = lrLength/2;
+        m_src_data.output_frames = overLrLength/2;
+        if ((m_srcError = src_process(m_src_state, &m_src_data)) > 0)
+        {
+            qWarning("SRConverter: src_process(): %s\n", src_strerror(m_srcError));
+        }
+        else
+        {
+            src_float_to_short_array(m_srcOut, m_wOut, m_src_data.output_frames_gen*2);
+            wbytes = m_src_data.output_frames_gen*4;
+            *out_data = new char[wbytes];
+            memcpy(*out_data, (char*) m_wOut, wbytes);
+        }
+    }
+    return wbytes;
+}
+
+void SRConverter::configure(ulong freq, int chan, int res)
+{
+    Effect::configure(freq, chan, res);
+    freeSRC();
+    uint rate = freq;
+    {
+        m_src_state = src_new(m_converter_type, 2, &m_srcError);
+        if (m_src_state)
+        {
+            m_src_data.src_ratio = (float)m_overSamplingFs/(float)rate;
+            rate = m_overSamplingFs;
+        }
+        else
+            qDebug("SRConverter: src_new(): %s", src_strerror(m_srcError));
+    }
+}
+
+const ulong SRConverter::frequency()
+{
+    return m_overSamplingFs;
+}
+
+void SRConverter::freeSRC()
+{
+    if (m_src_state != NULL)
+        m_src_state = src_delete(m_src_state);
+}