Huge new year audio commit!

* Refactored the whole audaspace library to use float as sample format over all readers.
* Added new Readers like the linear resampler, envelope, lowpass, highpass and butterworth.
* Note: The butterworth filter isn't working correctly, some bug in there... Maybe also true for the envelope.
* Added a sound to f-curve operator that behaves mostly like the soundtracker script of technoestupido.

4 files changed, 18 insertions, 30 deletions

diff --git a/intern/audaspace/SRC/AUD_SRCResampleFactory.cpp b/intern/audaspace/SRC/AUD_SRCResampleFactory.cpp
index bcace340b24..caafbd14327 100644
--- a/intern/audaspace/SRC/AUD_SRCResampleFactory.cpp
+++ b/intern/audaspace/SRC/AUD_SRCResampleFactory.cpp
@@ -27,14 +27,14 @@
 #include "AUD_SRCResampleReader.h"
 
 AUD_SRCResampleFactory::AUD_SRCResampleFactory(AUD_IReader* reader,
-											   AUD_Specs specs) :
+											   AUD_DeviceSpecs specs) :
 		AUD_ResampleFactory(reader, specs) {}
 
 AUD_SRCResampleFactory::AUD_SRCResampleFactory(AUD_IFactory* factory,
-											   AUD_Specs specs) :
+											   AUD_DeviceSpecs specs) :
 		AUD_ResampleFactory(factory, specs) {}
 
-AUD_SRCResampleFactory::AUD_SRCResampleFactory(AUD_Specs specs) :
+AUD_SRCResampleFactory::AUD_SRCResampleFactory(AUD_DeviceSpecs specs) :
 		AUD_ResampleFactory(specs) {}
 
 AUD_IReader* AUD_SRCResampleFactory::createReader()
@@ -45,7 +45,7 @@ AUD_IReader* AUD_SRCResampleFactory::createReader()
 	{
 		if(reader->getSpecs().rate != m_specs.rate)
 		{
-			reader = new AUD_SRCResampleReader(reader, m_specs);
+			reader = new AUD_SRCResampleReader(reader, m_specs.specs);
 			AUD_NEW("reader")
 		}
 	}
diff --git a/intern/audaspace/SRC/AUD_SRCResampleFactory.h b/intern/audaspace/SRC/AUD_SRCResampleFactory.h
index c23c1d2c82e..4b16c70169c 100644
--- a/intern/audaspace/SRC/AUD_SRCResampleFactory.h
+++ b/intern/audaspace/SRC/AUD_SRCResampleFactory.h
@@ -31,14 +31,13 @@
 /**
  * This factory creates a resampling reader that uses libsamplerate for
  * resampling.
- * \note The format of the input must be float.
  */
 class AUD_SRCResampleFactory : public AUD_ResampleFactory
 {
 public:
-	AUD_SRCResampleFactory(AUD_IReader* reader, AUD_Specs specs);
-	AUD_SRCResampleFactory(AUD_IFactory* factory, AUD_Specs specs);
-	AUD_SRCResampleFactory(AUD_Specs specs);
+	AUD_SRCResampleFactory(AUD_IReader* reader, AUD_DeviceSpecs specs);
+	AUD_SRCResampleFactory(AUD_IFactory* factory, AUD_DeviceSpecs specs);
+	AUD_SRCResampleFactory(AUD_DeviceSpecs specs);
 
 	virtual AUD_IReader* createReader();
 };
diff --git a/intern/audaspace/SRC/AUD_SRCResampleReader.cpp b/intern/audaspace/SRC/AUD_SRCResampleReader.cpp
index f7564d3c010..940f4245316 100644
--- a/intern/audaspace/SRC/AUD_SRCResampleReader.cpp
+++ b/intern/audaspace/SRC/AUD_SRCResampleReader.cpp
@@ -26,9 +26,9 @@
 #include "AUD_SRCResampleReader.h"
 #include "AUD_Buffer.h"
 
-#include <math.h>
+#include <cmath>
 #include <cstring>
-#include <stdio.h>
+#include <cstdio>
 
 static long src_callback(void *cb_data, float **data)
 {
@@ -41,15 +41,8 @@ AUD_SRCResampleReader::AUD_SRCResampleReader(AUD_IReader* reader,
 {
 	m_sspecs = reader->getSpecs();
 
-	if(m_sspecs.format != AUD_FORMAT_FLOAT32)
-	{
-		delete m_reader; AUD_DELETE("reader")
-		AUD_THROW(AUD_ERROR_READER);
-	}
-
 	m_tspecs = specs;
 	m_tspecs.channels = m_sspecs.channels;
-	m_tspecs.format = m_sspecs.format;
 	m_factor = (double)m_tspecs.rate / (double)m_sspecs.rate;
 
 	int error;
@@ -71,9 +64,9 @@ AUD_SRCResampleReader::AUD_SRCResampleReader(AUD_IReader* reader,
 
 AUD_SRCResampleReader::~AUD_SRCResampleReader()
 {
-	delete m_buffer; AUD_DELETE("buffer")
-
 	src_delete(m_src);
+
+	delete m_buffer; AUD_DELETE("buffer")
 }
 
 long AUD_SRCResampleReader::doCallback(float** data)
@@ -83,7 +76,7 @@ long AUD_SRCResampleReader::doCallback(float** data)
 
 	m_reader->read(length, buffer);
 
-	*data = (float*)buffer;
+	*data = buffer;
 	return length;
 }
 
@@ -110,10 +103,12 @@ AUD_Specs AUD_SRCResampleReader::getSpecs()
 
 void AUD_SRCResampleReader::read(int & length, sample_t* & buffer)
 {
-	if(m_buffer->getSize() < length * m_tspecs.channels * 4)
-		m_buffer->resize(length * m_tspecs.channels * 4);
+	int size = length * AUD_SAMPLE_SIZE(m_tspecs);
+
+	if(m_buffer->getSize() < size)
+		m_buffer->resize(size);
 
 	buffer = m_buffer->getBuffer();
 
-	length = src_callback_read(m_src, m_factor, length, (float*)buffer);
+	length = src_callback_read(m_src, m_factor, length, buffer);
 }
diff --git a/intern/audaspace/SRC/AUD_SRCResampleReader.h b/intern/audaspace/SRC/AUD_SRCResampleReader.h
index 1bacdb3965c..4fe30b48c6e 100644
--- a/intern/audaspace/SRC/AUD_SRCResampleReader.h
+++ b/intern/audaspace/SRC/AUD_SRCResampleReader.h
@@ -32,13 +32,7 @@ class AUD_Buffer;
 #include <samplerate.h>
 
 /**
- * This class mixes a sound source with help of the SDL library.
- * Unfortunately SDL is only capable of 8 and 16 bit audio, mono and stereo, as
- * well as resampling only 2^n sample rate relationships where n is a natural
- * number.
- * \warning Although SDL can only resample 2^n sample rate relationships, this
- *          class doesn't check for compliance, so in case of other factors,
- *          the behaviour is undefined.
+ * This resampling reader uses libsamplerate for resampling.
  */
 class AUD_SRCResampleReader : public AUD_EffectReader
 {