From 73f1a400608d93742e57c7ea3c4433eb1a2e1852 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Fri, 20 Sep 2013 22:23:23 +0200
Subject: =?UTF-8?q?New=20resample=20feature=20(greatly=20inspired=20by=20C?=
 =?UTF-8?q?=E9dric=20'SxDx')=20based=20on=20libsamplerate.?=
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---
 src/Makefile.am.drumgizmo |  2 +-
 src/audiofile.cc          | 42 ++++++++++++++++++++++++++++++++++++++----
 src/configuration.cc      |  2 ++
 src/configuration.h       |  2 ++
 src/drumgizmo.cc          | 10 ++++++++++
 src/drumgizmo.h           |  3 +++
 src/instrument.cc         |  3 ++-
 7 files changed, 58 insertions(+), 6 deletions(-)

(limited to 'src')

diff --git a/src/Makefile.am.drumgizmo b/src/Makefile.am.drumgizmo
index 47d54a2..c48c478 100644
--- a/src/Makefile.am.drumgizmo
+++ b/src/Makefile.am.drumgizmo
@@ -26,4 +26,4 @@ DRUMGIZMO_SOURCES = \
 	$(top_srcdir)/src/velocity.cc \
 	$(top_srcdir)/src/versionstr.cc
 
-DRUMGIZMO_LIBS = $(SNDFILE_LIBS) $(EXPAT_LIBS)
\ No newline at end of file
+DRUMGIZMO_LIBS = $(SNDFILE_LIBS) $(EXPAT_LIBS) $(SAMPLERATE_LIBS)
\ No newline at end of file
diff --git a/src/audiofile.cc b/src/audiofile.cc
index 37fb5cc..4ac1f94 100644
--- a/src/audiofile.cc
+++ b/src/audiofile.cc
@@ -31,9 +31,12 @@
 #include <unistd.h>
 
 #include <sndfile.h>
+#include <samplerate.h>
 
 #include <hugin.hpp>
 
+#include "configuration.h"
+
 #define LAZYLOAD
 
 AudioFile::AudioFile(std::string filename)
@@ -63,13 +66,13 @@ void AudioFile::unload()
 {
   MutexAutolock l(mutex);
   if(data == preloaded_data) {
-    delete data;
+    delete[] data;
     data = NULL;
     size = 0;
   }
   else {
     size = 0;
-    delete data;
+    delete[] data;
     data = NULL;
     delete preloaded_data;
     preloaded_data = NULL;
@@ -98,7 +101,7 @@ void AudioFile::init()
   sample_t* data = new sample_t[size];
   
   size = sf_read_float(fh, data, size); 
-  
+
   //DEBUG(audiofile,"Lazy loaded %d samples\n", size);
   sf_close(fh);
 
@@ -191,7 +194,13 @@ void AudioFile::load(int num_samples)
  
   size = sf_info.frames;
 
-  if(num_samples != ALL_SAMPLES && (int)size > num_samples) size = num_samples;
+  double ratio = (double)Conf::samplerate / (double)sf_info.samplerate;
+
+  if(num_samples != ALL_SAMPLES) {
+    // Make sure we read enough samples, even after conversion.
+    num_samples /= ratio;
+    if((int)size > num_samples) size = num_samples;
+  }
 
   sample_t* data = new sample_t[size]; 
   size = sf_read_float(fh, data, size); 
@@ -200,6 +209,31 @@ void AudioFile::load(int num_samples)
   
   sf_close(fh);
 
+  if(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", size, this);
+  }
+
+
   mutex.lock();
   this->data = data;
   is_loaded = true;
diff --git a/src/configuration.cc b/src/configuration.cc
index b71dfac..965dcf9 100644
--- a/src/configuration.cc
+++ b/src/configuration.cc
@@ -33,6 +33,8 @@ float Conf::velocity_modifier_weight = 0.25;
 bool Conf::enable_velocity_randomiser = false;
 float Conf::velocity_randomiser_weight = 0.1;
 
+int Conf::samplerate = 44100;
+
 #ifdef TEST_CONFIGURATION
 //Additional dependency files
 //deps:
diff --git a/src/configuration.h b/src/configuration.h
index 2690104..c49f997 100644
--- a/src/configuration.h
+++ b/src/configuration.h
@@ -34,6 +34,8 @@ namespace Conf {
 
   extern bool enable_velocity_randomiser;
   extern float velocity_randomiser_weight;
+
+  extern int samplerate;
 };
 
 
diff --git a/src/drumgizmo.cc b/src/drumgizmo.cc
index 4732c27..b99687d 100644
--- a/src/drumgizmo.cc
+++ b/src/drumgizmo.cc
@@ -406,6 +406,16 @@ void DrumGizmo::stop()
   // engine.stop();
 }
 
+int DrumGizmo::samplerate()
+{
+  return Conf::samplerate;
+}
+
+void DrumGizmo::setSamplerate(int samplerate)
+{
+  Conf::samplerate = samplerate;
+}
+
 std::string float2str(float a)
 {
   char buf[256];
diff --git a/src/drumgizmo.h b/src/drumgizmo.h
index 323c991..2ef0aeb 100644
--- a/src/drumgizmo.h
+++ b/src/drumgizmo.h
@@ -73,6 +73,9 @@ public:
 
   void handleMessage(Message *msg);
 
+  int samplerate();
+  void setSamplerate(int samplerate);
+  
 private:
   DrumKitLoader loader;
 
diff --git a/src/instrument.cc b/src/instrument.cc
index 1175f69..43ee4ac 100644
--- a/src/instrument.cc
+++ b/src/instrument.cc
@@ -83,7 +83,8 @@ Sample *Instrument::sample(level_t level, size_t pos)
   }
 
   if(Conf::enable_velocity_modifier) {
-    mod += (pos - lastpos) / (44100.0 * Conf::velocity_modifier_falloff);
+    mod += (pos - lastpos) /
+      (Conf::samplerate * Conf::velocity_modifier_falloff);
     if(mod > 1.0) mod = 1.0;
   }
 
-- 
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