Revert "AE: change usage of swr_set_compensation"

This reverts commit 7f4f89b.

xbmc/cores/AudioEngine/Engines/ActiveAE/ActiveAEResampleFFMPEG.cpp

@@ -58,7 +58,6 @@ bool CActiveAEResampleFFMPEG::Init(uint64_t dst_chan_layout, int dst_channels, i
   m_src_fmt = src_fmt;
   m_src_bits = src_bits;
   m_src_dither_bits = src_dither;
-  m_resampleRatio = 1.0;
 
   if (m_dst_chan_layout == 0)
     m_dst_chan_layout = av_get_default_channel_layout(m_dst_channels);
@@ -181,18 +180,18 @@ bool CActiveAEResampleFFMPEG::Init(uint64_t dst_chan_layout, int dst_channels, i
 
 int CActiveAEResampleFFMPEG::Resample(uint8_t **dst_buffer, int dst_samples, uint8_t **src_buffer, int src_samples, double ratio)
 {
-
-  if (ratio != m_resampleRatio)
+  int delta = 0;
+  int distance = 0;
+  if (ratio != 1.0)
   {
-    int delta = m_dst_rate * ratio - m_dst_rate;
-    int distance = m_dst_rate;
+    delta = (dst_samples*ratio-dst_samples)*m_dst_rate/m_src_rate;
+    distance = dst_samples*m_dst_rate/m_src_rate;
+  }
 
-    if (swr_set_compensation(m_pContext, delta, distance) < 0)
-    {
-      CLog::Log(LOGERROR, "CActiveAEResampleFFMPEG::Resample - set compensation failed");
-      return -1;
-    }
-    m_resampleRatio = ratio;
+  if (swr_set_compensation(m_pContext, delta, distance) < 0)
+  {
+    CLog::Log(LOGERROR, "CActiveAEResampleFFMPEG::Resample - set compensation failed");
+    return -1;
   }
 
   int ret = swr_convert(m_pContext, dst_buffer, dst_samples, (const uint8_t**)src_buffer, src_samples);

xbmc/cores/AudioEngine/Engines/ActiveAE/ActiveAEResampleFFMPEG.h

@@ -58,7 +58,6 @@ class CActiveAEResampleFFMPEG : public IAEResample
   int m_src_dither_bits, m_dst_dither_bits;
   SwrContext *m_pContext;
   double m_rematrix[AE_CH_MAX][AE_CH_MAX];
-  double m_resampleRatio;
 };
 
 }