Merge branch 'resample'

Add resample support.

24 files changed, 606 insertions, 169 deletions

diff --git a/.gitignore b/.gitignore
index 32c3162..4cfbcc4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,4 +27,8 @@ Makefile.am.test
 *.dll
 plugingui/plugingui
 plugingui/rcgen
-*.lo
\ No newline at end of file
+*.lo
+test/result_*.xml
+test/resampler
+test/engine
+test/gui
\ No newline at end of file
diff --git a/configure.ac b/configure.ac
index 8900d50..641f2f7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -317,16 +317,83 @@ dnl Check for sndfile
 dnl ======================
 PKG_CHECK_MODULES(SNDFILE, sndfile >= 1.0.20)
 
-AC_ARG_WITH(resample,  [  --with-resample             Build with resample support])
-if test x$with_resample == xyes; then
+
+AC_ARG_ENABLE([resampler],
+[  --enable-resampler[=lib]   Enable resampler using either 'zita' or 'src' (libsamplerate). Use 'auto' for autodetect [default=auto]],,
+        [enable_resampler="auto"])
+if test "x$enable_resampler" = "xyes"; then
+  enable_resampler="auto"
+fi
+
+has_src=no
+has_zita=no
+if test x$enable_resampler != xno; then
    AC_MSG_WARN([*** Building resample support!])
-   AC_DEFINE(WITH_RESAMPLE, [], [Use resample])
+   AC_DEFINE(WITH_RESAMPLER, [], [Use resample])
 
-   dnl ======================
-   dnl Check for libsamplerate
-   dnl ======================
-   PKG_CHECK_MODULES(SAMPLERATE, samplerate >= 0.1.7)
-fi 
+  if test x$enable_resampler == xauto || test x$enable_resampler == xsrc; then
+    dnl ======================
+    dnl Check for libsamplerate
+    dnl ======================
+    PKG_CHECK_MODULES(SAMPLERATE, samplerate >= 0.1.7, has_src=yes, has_src=no)
+  fi
+
+  if test x$enable_resampler == xauto || test x$enable_resampler == xzita; then
+    dnl ======================
+    dnl Check for the zitaresampler library
+    dnl ======================
+    AC_LANG_PUSH([C++])
+    tmp_CXXFLAGS="$CXXFLAGS"
+    tmp_CPPFLAGS="$CPPFLAGS"
+    tmp_CFLAGS="$CFLAGS"
+    tmp_LDFLAGS="$LDFLAGS"
+    tmp_LIBS="$LIBS"
+    CXXFLAGS=""
+    CPPFLAGS="$ZITA_CPPFLAGS"
+    CFLAGS=""
+    LDFLAGS="$ZITA_LDFLAGS -lzita-resampler -lpthread"
+    LIBS=""
+    AC_LINK_IFELSE(
+      [AC_LANG_PROGRAM([#include <zita-resampler/resampler.h>],
+        [Resampler r] ) ], has_zita=yes, has_zita=no)
+    ZITA_CPPFLAGS="$CXXFLAGS $CPPFLAGS $CFLAGS"
+    ZITA_LIBS="$LDFLAGS $LIBS"
+    CXXFLAGS="$tmp_CXXFLAGS"
+    CPPFLAGS="$tmp_CPPFLAGS"
+    CFLAGS="$tmp_CFLAGS"
+    LDFLAGS="$tmp_LDFLAGS"
+    LIBS="$tmp_LIBS"
+    AC_SUBST(ZITA_CPPFLAGS)
+    AC_SUBST(ZITA_LIBS)
+    AC_LANG_POP([C++])
+  fi
+fi
+
+if test x$enable_resampler == xauto; then
+   if test x$has_zita == xyes; then
+	   enable_resampler=zita
+   elif test x$has_src == xyes; then
+	   enable_resampler=src
+   else
+	   AC_MSG_ERROR([*** No resampler library present. Either libsamplerate or zita-resampler must be installed.])
+   fi
+fi
+
+if test x$enable_resampler == xzita; then
+	 if test x$has_zita == xyes; then
+	   AC_DEFINE(USE_ZITA, [], [zita-resampler is present])
+   else
+     AC_MSG_ERROR([*** zita-resampler library or headers not found. Set ZITA_LDFLAGS or ZITA_CPPFLAGS to add searchpath.])
+   fi
+fi
+
+if test x$enable_resampler == xsrc; then
+   if test x$has_src == xyes; then
+	   AC_DEFINE(USE_SRC, [], [libsamplerate is present])
+   else
+	   AC_MSG_ERROR([*** Missing libsamplerate.])
+   fi
+fi
 
 #dnl ======================
 #dnl Check for zlib
diff --git a/drumgizmo/audiooutputenginedl.cc b/drumgizmo/audiooutputenginedl.cc
index 513d21b..2648e8f 100644
--- a/drumgizmo/audiooutputenginedl.cc
+++ b/drumgizmo/audiooutputenginedl.cc
@@ -111,6 +111,13 @@ AudioOutputEngineDL::AudioOutputEngineDL(std::string name)
     o_bufsize = NULL;
   }
 
+  o_samplerate = (output_samplerate_func_t) dlsym(lib, "samplerate");
+  dlsym_error = dlerror();
+  if(dlsym_error) {
+    printf("Cannot load symbol samplerate: %s\n", dlsym_error);
+    return;
+  }
+
   ptr = o_create();
 
   if(is_jack_plugin) {
@@ -181,19 +188,8 @@ size_t AudioOutputEngineDL::getBufferSize()
   return 1024;
 }
 
-#ifdef TEST_AUDIOOUTPUTENGINEDL
-//Additional dependency files
-//deps:
-//Required cflags (autoconf vars may be used)
-//cflags:
-//Required link options (autoconf vars may be used)
-//libs:
-#include "test.h"
-
-TEST_BEGIN;
-
-// TODO: Put some testcode here (see test.h for usable macros).
-
-TEST_END;
-
-#endif/*TEST_AUDIOOUTPUTENGINEDL*/
+size_t AudioOutputEngineDL::samplerate()
+{
+  if(o_samplerate) return o_samplerate(ptr);
+  return 44100;
+}
diff --git a/drumgizmo/audiooutputenginedl.h b/drumgizmo/audiooutputenginedl.h
index 471247e..75460f3 100644
--- a/drumgizmo/audiooutputenginedl.h
+++ b/drumgizmo/audiooutputenginedl.h
@@ -46,6 +46,7 @@ typedef void (*output_pre_func_t)(void*, size_t);
 typedef void (*output_run_func_t)(void*,int,sample_t*,size_t);
 typedef void (*output_post_func_t)(void*, size_t);
 typedef size_t (*output_bufsize_func_t)(void*);
+typedef size_t (*output_samplerate_func_t)(void*);
 
 class AudioOutputEngineDL : public AudioOutputEngine {
 public:
@@ -64,6 +65,7 @@ public:
   void post(size_t nsamples);
 
   size_t getBufferSize();
+  size_t samplerate();
 
 private:
   void *ptr;
@@ -77,6 +79,7 @@ private:
   output_run_func_t o_run;
   output_post_func_t o_post;
   output_bufsize_func_t o_bufsize;
+  output_samplerate_func_t o_samplerate;
 
   bool is_jack_plugin;
   JackClient *jackclient;
diff --git a/drumgizmo/drumgizmoc.cc b/drumgizmo/drumgizmoc.cc
index c96736f..61f8eaa 100644
--- a/drumgizmo/drumgizmoc.cc
+++ b/drumgizmo/drumgizmoc.cc
@@ -187,7 +187,7 @@ int main(int argc, char *argv[])
     return 1;
   }
 
-  AudioOutputEngine *oe = new AudioOutputEngineDL(outputengine);
+  AudioOutputEngineDL *oe = new AudioOutputEngineDL(outputengine);
 
   if(oe == NULL) {
     printf("Invalid output engine: %s\n", outputengine.c_str());
@@ -248,6 +248,8 @@ int main(int argc, char *argv[])
     return 1;
   }
 
+  gizmo.setSamplerate(oe->samplerate());
+
   if(!gizmo.init(preload)) {
     printf("Failed init engine.\n");
     return 1;
diff --git a/drumgizmo/output/alsa/alsa.cc b/drumgizmo/output/alsa/alsa.cc
index 7b3a395..dc2ac73 100644
--- a/drumgizmo/output/alsa/alsa.cc
+++ b/drumgizmo/output/alsa/alsa.cc
@@ -49,6 +49,7 @@ public:
   void pre(size_t size);
   void run(int channel, sample_t* data, size_t size);
   void post(size_t size);
+  size_t samplerate();
 
 private:
   snd_pcm_t *handle;
@@ -157,6 +158,11 @@ void Alsa::post(size_t size)
   snd_pcm_writei(handle, data, size);
 }
 
+size_t Alsa::samplerate()
+{
+  return srate;
+}
+
 extern "C" {
   void *create()
   {
@@ -210,21 +216,10 @@ extern "C" {
     Alsa *alsa = (Alsa*)h;
     alsa->post(s);
   }
-}
-
-#ifdef TEST_AUDIOOUTPUTENGINEALSA
-//Additional dependency files
-//deps:
-//Required cflags (autoconf vars may be used)
-//cflags:
-//Required link options (autoconf vars may be used)
-//libs:
-#include "test.h"
-
-TEST_BEGIN;
 
-// TODO: Put some testcode here (see test.h for usable macros).
-
-TEST_END;
-
-#endif/*TEST_AUDIOOUTPUTENGINEALSA*/
+  size_t samplerate(void *h)
+  {
+    Alsa *alsa = (Alsa*)h;
+    return alsa->samplerate();
+  }
+}
diff --git a/drumgizmo/output/dummy/dummy.cc b/drumgizmo/output/dummy/dummy.cc
index cd210dc..e60f2b7 100644
--- a/drumgizmo/output/dummy/dummy.cc
+++ b/drumgizmo/output/dummy/dummy.cc
@@ -43,6 +43,8 @@ public:
   void pre(size_t size);
   void run(int channel, sample_t* data, size_t size);
   void post(size_t size);
+
+  size_t samplerate();
 };
 
 Dummy::Dummy()
@@ -83,6 +85,11 @@ void Dummy::post(size_t size)
 {
 }
 
+size_t Dummy::samplerate()
+{
+  return 44100;
+}
+
 extern "C" {
   void *create()
   {
@@ -136,21 +143,10 @@ extern "C" {
     Dummy *dummy = (Dummy*)h;
     dummy->post(size);
   }
-}
-
-#ifdef TEST_AUDIOOUTPUTENGINEDUMMY
-//Additional dependency files
-//deps:
-//Required cflags (autoconf vars may be used)
-//cflags:
-//Required link options (autoconf vars may be used)
-//libs:
-#include "test.h"
-
-TEST_BEGIN;
 
-// TODO: Put some testcode here (see test.h for usable macros).
-
-TEST_END;
-
-#endif/*TEST_AUDIOOUTPUTENGINEDUMMY*/
+  size_t samplerate(void *h)
+  {
+    Dummy *dummy = (Dummy*)h;
+    return dummy->samplerate();
+  }
+}
diff --git a/drumgizmo/output/jackaudio/jackaudio.cc b/drumgizmo/output/jackaudio/jackaudio.cc
index 2afe1ea..5c04146 100644
--- a/drumgizmo/output/jackaudio/jackaudio.cc
+++ b/drumgizmo/output/jackaudio/jackaudio.cc
@@ -54,6 +54,7 @@ public:
   void jack_process(jack_nframes_t nframes);
 
   size_t bufsize();
+  size_t samplerate();
 
 private:
   JackClient *jackclient;
@@ -146,6 +147,11 @@ size_t JackAudio::bufsize()
   return jack_get_buffer_size(jackclient->jack_client);
 }
 
+size_t JackAudio::samplerate()
+{
+  return jack_get_sample_rate(jackclient->jack_client);
+}
+
 extern "C" {
   void *create()
   {
@@ -205,21 +211,10 @@ extern "C" {
     JackAudio *jack = (JackAudio*)h;
     return jack->bufsize();
   }
-}
-
-#ifdef TEST_AUDIOINPUTENGINEJACKAUDIO
-//Additional dependency files
-//deps:
-//Required cflags (autoconf vars may be used)
-//cflags:
-//Required link options (autoconf vars may be used)
-//libs:
-#include "test.h"
-
-TEST_BEGIN;
 
-// TODO: Put some testcode here (see test.h for usable macros).
-
-TEST_END;
-
-#endif/*TEST_AUDIOINPUTENGINEJACKAUDIO*/
+  size_t samplerate(void *h)
+  {
+    JackAudio *jack = (JackAudio*)h;
+    return jack->samplerate();
+  }
+}
diff --git a/drumgizmo/output/wavfile/wavfile.cc b/drumgizmo/output/wavfile/wavfile.cc
index cb95715..fa4128e 100644
--- a/drumgizmo/output/wavfile/wavfile.cc
+++ b/drumgizmo/output/wavfile/wavfile.cc
@@ -44,6 +44,7 @@ public:
   void pre(size_t size);
   void run(int channel, sample_t* data, size_t size);
   void post(size_t size);
+  size_t samplerate();
 
 private:
   SF_INFO sf_info;
@@ -58,6 +59,10 @@ WavFile::WavFile()
 {
   fh = NULL;
   filename = "output";
+
+  sf_info.channels = 1;//channels;
+  sf_info.format = SF_FORMAT_WAV | SF_FORMAT_FLOAT;
+  sf_info.samplerate = 44100;
 }
 
 WavFile::~WavFile()
@@ -74,10 +79,6 @@ WavFile::~WavFile()
 bool WavFile::init(int channels, char *cnames[])
 {
   this->channels = channels;
-  
-  sf_info.channels = 1;//channels;
-  sf_info.format = SF_FORMAT_WAV | SF_FORMAT_FLOAT;
-  sf_info.samplerate = 44100;
 
   fh = (SNDFILE **)malloc(sizeof(SNDFILE *)*channels);
 
@@ -102,6 +103,7 @@ bool WavFile::init(int channels, char *cnames[])
 void WavFile::setParm(std::string parm, std::string value)
 {
   if(parm == "file") filename = value;
+  if(parm == "srate") sf_info.samplerate = atoi(value.c_str());
 }
 
 bool WavFile::start()
@@ -126,6 +128,11 @@ void WavFile::post(size_t size)
 {
 }
 
+size_t WavFile::samplerate()
+{
+  return sf_info.samplerate;
+}
+
 extern "C" {
   void *create()
   {
@@ -179,21 +186,10 @@ extern "C" {
     WavFile *sndfile = (WavFile*)h;
     sndfile->post(s);
   }
-}
-
-#ifdef TEST_AUDIOOUTPUTENGINESNDFILE
-//Additional dependency files
-//deps:
-//Required cflags (autoconf vars may be used)
-//cflags:
-//Required link options (autoconf vars may be used)
-//libs:
-#include "test.h"
-
-TEST_BEGIN;
-
-// TODO: Put some testcode here (see test.h for usable macros).
 
-TEST_END;
-
-#endif/*TEST_AUDIOOUTPUTENGINESNDFILE*/
+  size_t samplerate(void *h)
+  {
+    WavFile *wavfile = (WavFile*)h;
+    return wavfile->samplerate();
+  }
+}
diff --git a/hugin b/hugin
-Subproject 7e734710be0098ea77ca2d3f54fb626b65bbf47
+Subproject bb7388b685ed043b4a3030da86f7f1e49141477
diff --git a/lv2/Makefile.am b/lv2/Makefile.am
index a714dce..9939131 100644
--- a/lv2/Makefile.am
+++ b/lv2/Makefile.am
@@ -3,12 +3,6 @@ if ENABLE_LV2
 include $(top_srcdir)/plugingui/Makefile.am.plugingui
 include $(top_srcdir)/src/Makefile.am.drumgizmo
 
-AM_CPPFLAGS = -I$(top_srcdir)/src -I$(top_srcdir)/plugingui \
-	-I$(top_srcdir)/include $(SNDFILE_CXXFLAGS) \
-	$(PTHREAD_CFLAGS) $(EXPAT_CFLAGS) $(LV2_CFLAGS) \
-	$(PLUGIN_GUI_CFLAGS) $(SSEFLAGS)\
-	-DUSE_THREAD $(SAMPLERATE_CFLAGS)
-
 plugindir = $(prefix)/lib/lv2/drumgizmo.lv2
 plugin_LTLIBRARIES = drumgizmo.la
 plugin_DATA = manifest.ttl drumgizmo.ttl
@@ -21,6 +15,12 @@ EXTRA_DIST = \
 	lv2_gui.h \
 	lv2_instance.h
 
+drumgizmo_la_CXXFLAGS = -I$(top_srcdir)/src -I$(top_srcdir)/plugingui \
+	-I$(top_srcdir)/include $(SNDFILE_CXXFLAGS) \
+	$(PTHREAD_CFLAGS) $(EXPAT_CFLAGS) $(LV2_CFLAGS) \
+	$(PLUGIN_GUI_CFLAGS) $(SSEFLAGS) $(ZITA_CPPFLAGS) \
+	-DUSE_THREAD $(SAMPLERATE_CFLAGS)
+
 drumgizmo_la_SOURCES = \
 	$(DRUMGIZMO_SOURCES) \
 	$(PLUGIN_GUI_SOURCES) \
diff --git a/lv2/output_lv2.cc b/lv2/output_lv2.cc
index 8187a5a..ef2500b 100644
--- a/lv2/output_lv2.cc
+++ b/lv2/output_lv2.cc
@@ -82,20 +82,3 @@ sample_t *OutputLV2::getBuffer(int ch)
   if(ch < NUM_OUTPUTS) return outputPorts[ch].samples;
   return NULL;
 }
-
-#ifdef TEST_OUTPUT_LV2
-//Additional dependency files
-//deps:
-//Required cflags (autoconf vars may be used)
-//cflags:
-//Required link options (autoconf vars may be used)
-//libs:
-#include "test.h"
-
-TEST_BEGIN;
-
-// TODO: Put some testcode here (see test.h for usable macros).
-
-TEST_END;
-
-#endif/*TEST_OUTPUT_LV2*/
diff --git a/src/Makefile.am.drumgizmo b/src/Makefile.am.drumgizmo
index c48c478..26e2a30 100644
--- a/src/Makefile.am.drumgizmo
+++ b/src/Makefile.am.drumgizmo
@@ -3,6 +3,7 @@ DRUMGIZMO_SOURCES = \
 	$(top_srcdir)/src/audiofile.cc \
 	$(top_srcdir)/src/channel.cc \
 	$(top_srcdir)/src/channelmixer.cc \
+	$(top_srcdir)/src/chresampler.cc \
 	$(top_srcdir)/src/configuration.cc \
 	$(top_srcdir)/src/configparser.cc \
 	$(top_srcdir)/src/drumgizmo.cc \
@@ -26,4 +27,4 @@ DRUMGIZMO_SOURCES = \
 	$(top_srcdir)/src/velocity.cc \
 	$(top_srcdir)/src/versionstr.cc
 
-DRUMGIZMO_LIBS = $(SNDFILE_LIBS) $(EXPAT_LIBS) $(SAMPLERATE_LIBS)
\ No newline at end of file
+DRUMGIZMO_LIBS = $(ZITA_LIBS) $(SNDFILE_LIBS) $(EXPAT_LIBS) $(SAMPLERATE_LIBS)
\ No newline at end of file
diff --git a/src/audiofile.cc b/src/audiofile.cc
index 874b9c5..59e0c14 100644
--- a/src/audiofile.cc
+++ b/src/audiofile.cc
@@ -34,9 +34,6 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <sndfile.h>
-#ifdef WITH_RESAMPLE
-#include <samplerate.h>
-#endif/*WITH_RESAMPLE*/
 #include <hugin.hpp>
 
 #include "configuration.h"
@@ -154,39 +151,6 @@ void AudioFile::load(int num_samples)
   
   sf_close(fh);
 
-#ifdef WITH_RESAMPLE
-
-  // Check environment to see if resample should be disabled.
-  // Defaults to "1" which is 'enable'. All other values are 'disabled'.
-  const char *env_res = getenv("DRUMGIZMO_RESAMPLE");
-  if(env_res == NULL) env_res = "1";
-
-  if( (strcmp(env_res, "1") == 0) &&
-      Conf::samplerate != sf_info.samplerate) {
-    // Resample data...
-    size_t osize = size * ratio;
-    sample_t *odata = new sample_t[osize];
-
-    SRC_DATA src;
-    src.data_in = data;
-    src.input_frames = size;
-
-    src.data_out = odata;
-    src.output_frames = osize;
-
-    src.src_ratio = ratio;
-
-    // Do the conversion
-    src_simple(&src, SRC_SINC_BEST_QUALITY, 1);
-
-    delete[] data;
-    data = odata;
-    size = src.output_frames;
-
-    DEBUG(audiofile,"Converted into %d samples %p\n", (int)size, this);
-  }
-#endif/*WITH_RESAMPLE*/
-
   this->data = data;
   is_loaded = true;
 
diff --git a/src/chresampler.cc b/src/chresampler.cc
new file mode 100644
index 0000000..301e650
--- /dev/null
+++ b/src/chresampler.cc
@@ -0,0 +1,170 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            chresampler.cc
+ *
+ *  Tue Sep 23 20:42:14 CEST 2014
+ *  Copyright 2014 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo 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.
+ *
+ *  DrumGizmo 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 DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "chresampler.h"
+
+#include <config.h>
+#include <hugin.hpp>
+#include <stdio.h>
+
+#ifdef WITH_RESAMPLER
+
+#if defined(USE_ZITA)
+  #include <zita-resampler/resampler.h>
+#elif defined(USE_SRC)
+  #include <samplerate.h>
+#else
+  #error "No resampler selected"
+#endif
+
+class CHResampler::Prv {
+public:
+#if defined(USE_ZITA)
+  Resampler zita;
+#elif defined(USE_SRC)
+  SRC_STATE *state;
+  SRC_DATA data;
+#endif
+};
+
+CHResampler::CHResampler()
+{
+  input_fs = 44100;
+  output_fs = 44100;
+
+  prv = new Prv();
+#if defined(SRC)
+  prv->state = NULL;
+#endif
+}
+
+void CHResampler::setup(double input_fs, double output_fs)
+{
+  int nchan = 1; // always mono
+
+  this->input_fs = input_fs;
+  this->output_fs = output_fs;
+
+#if defined(USE_ZITA)
+  DEBUG(resampler, "Using zita-resampler (%d -> %d)", (int)input_fs, (int)output_fs);
+
+  int hlen = 72; // 16 ≤ hlen ≤ 96
+  // delay is 2 * hlen, 72 corresponds to delay introduced by SRC.
+  prv->zita.setup(input_fs, output_fs, nchan, hlen);
+#elif defined(USE_SRC)
+  DEBUG(resampler, "Using libsamplerate (%d -> %d)", (int)input_fs, (int)output_fs);
+
+  int err;
+  prv->state = src_new(SRC_SINC_BEST_QUALITY, nchan, &err);
+  (void)err;
+  //  printf("err: %d\n", err);
+  src_set_ratio(prv->state, output_fs / input_fs);
+  prv->data.src_ratio = output_fs / input_fs;
+  prv->data.end_of_input = 0;
+#endif
+}
+
+CHResampler::~CHResampler()
+{
+#if defined(USE_ZITA)
+#elif defined(USE_SRC)
+  if(prv->state) src_delete(prv->state);
+#endif
+  delete prv;
+}
+
+void CHResampler::setInputSamples(float *samples, size_t count)
+{
+#if defined(USE_ZITA)
+  prv->zita.inp_data = samples;
+  prv->zita.inp_count = count;
+#elif defined(USE_SRC)
+  prv->data.data_in = samples;
+  prv->data.input_frames = count;
+#endif
+}
+
+void CHResampler::setOutputSamples(float *samples, size_t count)
+{
+#if defined(USE_ZITA)
+  prv->zita.out_data = samples;
+  prv->zita.out_count = count;
+#elif defined(USE_SRC)
+  prv->data.data_out = samples;
+  prv->data.output_frames = count;
+#endif
+}
+
+void CHResampler::process()
+{
+#if defined(USE_ZITA)
+  prv->zita.process();
+#elif defined(USE_SRC)
+  src_process(prv->state, &prv->data);
+  prv->data.output_frames -= prv->data.output_frames_gen;
+  prv->data.data_out +=  prv->data.output_frames_gen;
+  prv->data.input_frames -= prv->data.input_frames_used;
+  prv->data.data_in += prv->data.input_frames_used;
+#endif
+}
+
+size_t CHResampler::getInputSampleCount()
+{
+#if defined(USE_ZITA)
+  return prv->zita.inp_count;
+#elif defined(USE_SRC)
+  return prv->data.input_frames;
+#endif
+}
+
+size_t CHResampler::getOutputSampleCount()
+{
+#if defined(USE_ZITA)
+  return prv->zita.out_count;
+#elif defined(USE_SRC)
+  return prv->data.output_frames;
+#endif
+}
+
+double CHResampler::ratio()
+{
+  return input_fs / output_fs;
+}
+
+#else
+
+// Dummy implementation
+CHResampler::CHResampler() {}
+CHResampler::~CHResampler() {}
+void CHResampler::setup(double, double) {}
+void CHResampler::setInputSamples(float *, size_t) {}
+void CHResampler::setOutputSamples(float *, size_t) {}
+void CHResampler::process() {}
+size_t CHResampler::getInputSampleCount() { return 0; }
+size_t CHResampler::getOutputSampleCount() { return 0; }
+double CHResampler::ratio() { return 1; }
+
+#endif/*WITH_RESAMPLER*/
diff --git a/src/chresampler.h b/src/chresampler.h
new file mode 100644
index 0000000..5943627
--- /dev/null
+++ b/src/chresampler.h
@@ -0,0 +1,65 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            chresampler.h
+ *
+ *  Tue Sep 23 20:42:14 CEST 2014
+ *  Copyright 2014 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo 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.
+ *
+ *  DrumGizmo 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 DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#ifndef __DRUMGIZMO_CHRESAMPLER_H__
+#define __DRUMGIZMO_CHRESAMPLER_H__
+
+#include <stdlib.h>
+
+/**
+ * Channel resampler class using either zita-resampler or secret rabbit code
+ * (really!!) depending on the value of the WITH_RESAMPLER macro.
+ * If WITH_RESAMPLER is unset the resampler is disabled entirely.
+ * If WITH_RESAMPLER=="zita" zita-resampler will be used.
+ * If WITH_RESAMPLER=="src" Secret Rabbit Code will be used.
+ */
+class CHResampler {
+public:
+  CHResampler();
+  ~CHResampler();
+
+  void setup(double input_fs, double output_fs);
+
+  void setInputSamples(float *samples, size_t count);
+  void setOutputSamples(float *samples, size_t count);
+
+  void process();
+
+  size_t getInputSampleCount();
+  size_t getOutputSampleCount();
+
+  double ratio();
+
+private:
+  class Prv;
+  Prv *prv;
+
+  double input_fs;
+  double output_fs;
+};
+
+
+#endif/*__DRUMGIZMO_CHRESAMPLER_H__*/
diff --git a/src/drumgizmo.cc b/src/drumgizmo.cc
index 0337fae..6b48cda 100644
--- a/src/drumgizmo.cc
+++ b/src/drumgizmo.cc
@@ -36,6 +36,8 @@
 
 #include <hugin.hpp>
 
+#include <config.h>
+
 #include "drumkitparser.h"
 #include "audioinputenginemidi.h"
 #include "configuration.h"
@@ -71,6 +73,12 @@ bool DrumGizmo::loadkit(std::string file)
 
   loader.loadKit(&kit);
 
+#ifdef WITH_RESAMPLER
+  for(int i = 0; i < MAX_NUM_CHANNELS; i++) {
+    resampler[i].setup(kit.samplerate(), Conf::samplerate);
+  }
+#endif/*WITH_RESAMPLER*/
+
   DEBUG(loadkit, "loadkit: Success\n");
 
   return true;
@@ -239,7 +247,7 @@ bool DrumGizmo::run(size_t pos, sample_t *samples, size_t nsamples)
         } else {
           //DEBUG(drumgizmo, "Adding event %d.\n", evs[e].offset);
           Event *evt = new EventSample(ch.num, 1.0, af, i->group(), i);
-          evt->offset = evs[e].offset + pos;
+          evt->offset = (evs[e].offset + pos) * resampler[0].ratio();
           activeevents[ch.num].push_back(evt);
         }
         j++;
@@ -253,11 +261,12 @@ bool DrumGizmo::run(size_t pos, sample_t *samples, size_t nsamples)
   }
     
   free(evs);
-  
-  
+
   //
   // Write audio
   //
+#ifndef WITH_RESAMPLER
+  // No resampling needed
   for(size_t c = 0; c < kit.channels.size(); c++) {
     sample_t *buf = samples;
     bool internal = false;
@@ -269,9 +278,49 @@ bool DrumGizmo::run(size_t pos, sample_t *samples, size_t nsamples)
       memset(buf, 0, nsamples * sizeof(sample_t));
       
       getSamples(c, pos, buf, nsamples);
+
       if(!internal) oe->run(c, samples, nsamples);
     }
   }
+#else/*WITH_RESAMPLER*/
+  // Resampling needed
+
+  //
+  // NOTE: Channels must be processed one buffer at a time on all channels in
+  // parallel - NOT all buffers on one channel and then all buffer on the next
+  // one since this would mess up the event queue (it would jump back and forth
+  // in time)
+  //
+
+  // Prepare output buffer
+  for(size_t c = 0; c < kit.channels.size(); c++) {
+    resampler[c].setOutputSamples(resampler_output_buffer[c], nsamples);
+  }
+
+  // Process channel data
+  size_t kitpos = pos * resampler[0].ratio();
+  //printf("ratio: %f\n", resampler[c].ratio());
+  while(resampler[0].getOutputSampleCount() > 0) {
+    for(size_t c = 0; c < kit.channels.size(); c++) {
+      if(resampler[c].getInputSampleCount() == 0) {
+        sample_t *sin = resampler_input_buffer[c];
+        size_t insize = sizeof(resampler_input_buffer[c]) / sizeof(sample_t);
+        memset(resampler_input_buffer[c], 0,
+               sizeof(resampler_input_buffer[c]));
+        getSamples(c, kitpos, sin, insize);
+        kitpos += insize;
+
+        resampler[c].setInputSamples(sin, insize);
+      }
+      resampler[c].process();
+    }
+  }
+
+  // Write output data to output engine.
+  for(size_t c = 0; c < kit.channels.size(); c++) {
+    oe->run(c, resampler_output_buffer[c], nsamples);
+  }
+#endif/*WITH_RESAMPLER*/
   
   ie->post();
   oe->post(nsamples);
@@ -332,7 +381,7 @@ void DrumGizmo::getSamples(int ch, int pos, sample_t *s, size_t sz)
         size_t n = 0;
         if(evt->offset > (size_t)pos) n = evt->offset - pos;
         size_t end = sz;
-        if(evt->t + end - n > af->size) end = af->size - evt->t + n;
+        if((evt->t + end - n) > af->size) end = af->size - evt->t + n;
         if(end > sz) end = sz;
 
         if(evt->rampdown == NO_RAMPDOWN) {
@@ -391,6 +440,12 @@ int DrumGizmo::samplerate()
 void DrumGizmo::setSamplerate(int samplerate)
 {
   Conf::samplerate = samplerate;
+#ifdef WITH_RESAMPLER
+  for(int i = 0; i < MAX_NUM_CHANNELS; i++) {
+    resampler[i].setup(kit.samplerate(), Conf::samplerate);
+  }
+#endif/*WITH_RESAMPLER*/
+
 }
 
 std::string float2str(float a)
diff --git a/src/drumgizmo.h b/src/drumgizmo.h
index 37b26e5..138e61c 100644
--- a/src/drumgizmo.h
+++ b/src/drumgizmo.h
@@ -45,7 +45,9 @@
 
 #include "messagereceiver.h"
 
-#define MAX_NUM_CHANNELS 512
+#include "chresampler.h"
+
+#define MAX_NUM_CHANNELS 64
 
 class DrumGizmo : public MessageReceiver {
 public:
@@ -87,6 +89,10 @@ private:
 
   std::list< Event* > activeevents[MAX_NUM_CHANNELS];
 
+  CHResampler resampler[MAX_NUM_CHANNELS];
+  sample_t resampler_output_buffer[MAX_NUM_CHANNELS][4096];
+  sample_t resampler_input_buffer[MAX_NUM_CHANNELS][64];
+
   std::map<std::string, AudioFile *> audiofiles;
 
 #ifdef TEST_DRUMGIZMO
diff --git a/src/drumkit.cc b/src/drumkit.cc
index c2aa221..4d75f3b 100644
--- a/src/drumkit.cc
+++ b/src/drumkit.cc
@@ -50,6 +50,7 @@ void DrumKit::clear()
 
   _name = "";
   _description = "";
+  _samplerate = 44100;
 }
 
 bool DrumKit::isValid()
@@ -72,6 +73,11 @@ std::string DrumKit::description()
   return _description;
 }
 
+size_t DrumKit::samplerate()
+{
+  return _samplerate;
+}
+
 #ifdef TEST_DRUMKIT
 //Additional dependency files
 //deps:
diff --git a/src/drumkit.h b/src/drumkit.h
index 82fe69b..04b2c56 100644
--- a/src/drumkit.h
+++ b/src/drumkit.h
@@ -53,6 +53,8 @@ public:
 
   bool isValid();
 
+  size_t samplerate();
+
 private:
   void *magic;
 
@@ -60,6 +62,7 @@ private:
 
   std::string _name;
   std::string _description;
+  size_t _samplerate;
 
   VersionStr _version;
 };
diff --git a/src/drumkitparser.cc b/src/drumkitparser.cc
index 1b7ecaf..2c21c52 100644
--- a/src/drumkitparser.cc
+++ b/src/drumkitparser.cc
@@ -60,6 +60,14 @@ void DrumKitParser::startTag(std::string name,
     if(attr.find("name") != attr.end())
       kit._name = attr["name"];
 
+    if(attr.find("samplerate") != attr.end()) {
+      kit._samplerate = atoi(attr["samplerate"].c_str());
+    } else {
+      // If 'samplerate' attribute is missing, assume 44k1Hz
+      // TODO: Ask instrument what samplerate is in the audiofiles...
+      kit._samplerate = 44100;
+    }
+
     if(attr.find("description") != attr.end())
       kit._description = attr["description"];
 
diff --git a/test/Makefile.am b/test/Makefile.am
index 77a0f96..e43a6ba 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -1,18 +1,15 @@
 # Rules for the test code (use `make check` to execute)
 include $(top_srcdir)/src/Makefile.am.drumgizmo
 
-TESTS = engine gui
+TESTS = engine gui resampler
 
 check_PROGRAMS = $(TESTS)
 
 engine_CXXFLAGS = -DOUTPUT=\"engine\" $(CPPUNIT_CFLAGS) \
 	-I$(top_srcdir)/src -I$(top_srcdir)/include \
 	-I$(top_srcdir)/hugin -DDISABLE_HUGIN
-
 engine_CFLAGS = -DDISABLE_HUGIN
-
 engine_LDFLAGS = $(CPPUNIT_LIBS) $(DRUMGIZMO_LIBS) $(PTHREAD_LIBS)
-
 engine_SOURCES = \
 	$(DRUMGIZMO_SOURCES) \
 	$(top_srcdir)/hugin/hugin.c \
@@ -24,3 +21,12 @@ gui_LDFLAGS = $(CPPUNIT_LIBS)
 gui_SOURCES = \
 	test.cc \
 	gui.cc
+
+resampler_CXXFLAGS = -DOUTPUT=\"resampler\" $(CPPUNIT_CFLAGS) \
+	$(ZITA_CXXFLAGS) $(SAMPLERATE_CFLAGS) \
+	-I$(top_srcdir)/hugin -DDISABLE_HUGIN
+resampler_LDFLAGS = $(ZITA_LIBS) $(SAMPLERATE_LIBS) $(CPPUNIT_LIBS)
+resampler_SOURCES = \
+	$(top_srcdir)/src/chresampler.cc \
+	test.cc \
+	resampler.cc
\ No newline at end of file
diff --git a/test/resampler.cc b/test/resampler.cc
new file mode 100644
index 0000000..445a5b3
--- /dev/null
+++ b/test/resampler.cc
@@ -0,0 +1,112 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            resampler.cc
+ *
+ *  Sun Oct  5 20:16:22 CEST 2014
+ *  Copyright 2014 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo 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.
+ *
+ *  DrumGizmo 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 DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include <cppunit/extensions/HelperMacros.h>
+
+#include "../src/chresampler.h"
+#include <unistd.h>
+
+#define BUFSZ 500
+
+static float round(float a) { return a<0.5?0:1; }
+
+class test_resampler : public CppUnit::TestFixture
+{
+  CPPUNIT_TEST_SUITE(test_resampler);
+	CPPUNIT_TEST(resampling);
+	CPPUNIT_TEST(resampling_buffer_sizes);
+	CPPUNIT_TEST_SUITE_END();
+
+public:
+	void setUp() {}
+	void tearDown() {}
+
+  void resampling()
+  {
+    CHResampler r;
+    CPPUNIT_ASSERT_EQUAL(1.0, r.ratio());
+    
+    r.setup(44100, 48000);
+    CPPUNIT_ASSERT_EQUAL(44100.0/48000.0, r.ratio());
+
+    float in[BUFSZ];
+    for(int i = 0; i < BUFSZ; i++) in[i] = 0;//(float)i/(float)BUFSZ;
+    in[100] = 1.0;
+
+    float out[BUFSZ];
+    r.setInputSamples(in, sizeof(in) / sizeof(float));
+    r.setOutputSamples(out, sizeof(out) / sizeof(float));
+    r.process();
+    CPPUNIT_ASSERT_EQUAL((size_t)0, r.getInputSampleCount());
+
+    //    CPPUNIT_ASSERT_EQUAL(, r.getOutputSampleCount());
+
+    int outidx = -1;
+    int inidx = -1;
+    for(int i = 0; i < BUFSZ - (int)r.getOutputSampleCount(); i++) {
+      if(in[i] == 1.0) inidx = i;
+      if(round(out[i]) == 1.0) outidx = i;
+      //printf("in[% 4d]\t= %f\t", i, in[i]);
+      //printf("out[% 4d]\t= %f\n", i, out[i]);
+    }
+
+    CPPUNIT_ASSERT(inidx != -1);
+    CPPUNIT_ASSERT(outidx != -1);
+
+    //printf("inidx: %d - outidx: %d\n", inidx, outidx);
+    //CPPUNIT_ASSERT_EQUAL(71, inidx - outidx); // This does not make sense...
+	}
+
+  void resampling_buffer_sizes()
+  {
+    CHResampler r;
+    CPPUNIT_ASSERT_EQUAL(1.0, r.ratio());
+    
+    double infs = 24000;
+    double outfs = 48000;
+    r.setup(infs, outfs);
+    CPPUNIT_ASSERT_EQUAL(infs / outfs, r.ratio());
+
+    float in[BUFSZ];
+    float out[(int)(BUFSZ / r.ratio())];
+
+    // Preload resampler
+    r.setOutputSamples(out, 1);
+    while(r.getOutputSampleCount()) {
+      r.setInputSamples(in, 1);
+      r.process();
+    }
+
+    r.setInputSamples(in, sizeof(in) / sizeof(float));
+    r.setOutputSamples(out, sizeof(out) / sizeof(float));
+    r.process();
+    CPPUNIT_ASSERT_EQUAL((size_t)0, r.getInputSampleCount());
+    CPPUNIT_ASSERT_EQUAL((size_t)0, r.getOutputSampleCount());
+  }
+};
+
+// Registers the fixture into the 'registry'
+CPPUNIT_TEST_SUITE_REGISTRATION(test_resampler);
diff --git a/vst/Makefile.mingw32.in b/vst/Makefile.mingw32.in
index f8aab4d..66e02ed 100644
--- a/vst/Makefile.mingw32.in
+++ b/vst/Makefile.mingw32.in
@@ -11,6 +11,7 @@ DG_SRC = \
 	@top_srcdir@/src/audiofile.cc \
 	@top_srcdir@/src/channel.cc \
 	@top_srcdir@/src/channelmixer.cc \
+	@top_srcdir@/src/chresampler.cc \
 	@top_srcdir@/src/configuration.cc \
 	@top_srcdir@/src/configparser.cc \
 	@top_srcdir@/src/drumgizmo.cc \
@@ -92,7 +93,10 @@ ZLIB_CFLAGS=@ZLIB_CFLAGS@
 ZLIB_LIBS=@ZLIB_LIBS@
 
 SRC_CFLAGS=@SAMPLERATE_CFLAGS@
-SRC_LIBS=@SAMPLERATE_CFLAGS@
+SRC_LIBS=@SAMPLERATE_LIBS@
+
+ZITA_CXXFLAGS=@ZITA_CPPFLAGS@
+ZITA_LIBS=@ZITA_LIBS@
 
 SRC = \
 	drumgizmo_vst.cc \
@@ -133,7 +137,7 @@ SRC = \
 all:
 	gcc $(DBG_CFLAGS) @top_srcdir@/hugin/hugin.c -c
 	gcc $(DBG_CFLAGS) @top_srcdir@/hugin/hugin_syslog.c -c
-	g++ -static -static-libgcc -O2 -g -Wall $(DBG_CFLAGS) $(DG_CFLAGS) $(DG_LIBS) $(VST_CFLAGS) hugin.o hugin_syslog.o $(DG_SRC) $(VST_SRC) ${SRC} ${GUI_SRC} ${GUI_CFLAGS} $(GUI_LIBS) $(EXPAT_CFLAGS) $(ZLIB_CFLAGS) $(SRC_CFLAGS) $(EXPAT_LIBS) $(ZLIB_LIBS) $(SNDFILE_CFLAGS) $(SNDFILE_LIBS) $(SRC_LIBS) -shared -o drumgizmo_vst.dll -Wl,--out-implib,libdrumgizmo_vst.a
+	g++ -static -static-libgcc -O2 -g -Wall $(DBG_CFLAGS) $(DG_CFLAGS) $(DG_LIBS) $(VST_CFLAGS) hugin.o hugin_syslog.o $(DG_SRC) $(VST_SRC) ${SRC} ${GUI_SRC} ${GUI_CFLAGS} $(GUI_LIBS) $(EXPAT_CFLAGS) $(ZLIB_CFLAGS) $(SRC_CFLAGS) $(ZITA_CXXFLAGS) $(EXPAT_LIBS) $(ZLIB_LIBS) $(SNDFILE_CFLAGS) $(SNDFILE_LIBS) $(SRC_LIBS) $(ZITA_LIBS) -shared -o drumgizmo_vst.dll -Wl,--out-implib,libdrumgizmo_vst.a
  
 clean:
 	del -f drumgizmo_vst.dll libdrumgizmo_vst.a