Xpressive plugin (LMMS#3259)

* First Preview of the X-Pressive Plugin
(exprtk.hpp is not included, get it from my exprtk fork in the branch
internal_data_functions)
available keys:
f- note's frequency. available only in the output expressions
t- time in seconds. in the Waves (W1,W2,W3) it's in the range [0,1)
key- the note's keyboard key. available only in the output expressions.
v- the note's velocity (divided by 255.0 so it is in the range [0,1]).
available only in the output expressions.
rel- gives 0 while the key is holded, and 1 after the key release.
available only in the output expressions.
A1,A2,A3- general purpose knobs (you can control them with the
automations). available only in the output expressions.
W1,W2,W3- precalculated wave forms. can be also load from file. you can
use them only in the output expressions
available functions:
cent(x)- gives pow(2,x/1200)
rand()- random number generator. in range [-1,1). each call gives other
value.
randv(i)- random vector (with pseudo infinite integer cells). the values
are in range [-1,1). it's stays consistent only across the note
playback. so each note playback will get other vector (even on the same
key).
sinew- sine wave with period of 1.
saww- saw wave with period of 1.
squarew- square wave with period of 1.
trianglew- triangle wave with period of 1.
expw- exponent wave with period of 1.
expnw- another exponent wave with period of 1.
moogw- moog wave with period of 1.
moogsaww- moog-saw wave with period of 1.
you can use * % ^ / + - pow sin log pi etc.

* Xpressive Plug-In:
Added Release transition knob that control the "rel" variable. (the
duration of transit from 0 to 1)
Fixed some problems in the displays. (update display when changing
A1,A2,A3, clear display with invalid expression.

* X-Pressive Plug-In: Few more fixes
Changed the callbacks in exprfront.cpp to be templated.
Added help.
Added ExprTk.hpp.
some bug fixes (inf issues).
Added integrate function.

* Special version of ExprTk with modified license (BSL) for the LMMS project https://github.com/LMMS/lmms

* Xpressive Plug-In- fixed some building errors.
Added the "e" euler's constant.

* Xpressive Plug-In - fix mingw64 issues

* X-Pressive Plug-in:
Added "trel" (time since release) variable.
The integrate function can now have unlimited usage.
Added selective interpolation per wave.
Improved a little the random vector function.
Some other improvements, code cleaning, etc...

* Xpressive Plug-In:
move clearGraph definition into Graph.cpp.
fixed compilation errors. (oops..)

* X-Pressive plug-in: updated presets names

* X-Pressive plug-in
added semitone function, added sample-rate variable

* X-Pressive plug-in, code cleaning, changed the rendering function to
achieve performace gain.

* X-Pressive plug-in - fix the string counting function

* X-Pressive plug-in - until somebody will find a better solution,
exprtk.hpp is patched under the name exprtk.patched.hpp ...

* X-Pressive plug-in - fix compiling errors.

* X-Pressive plug-in - added patch file for exprtk.hpp,
added last function that gives last calculated samples.
moved ExprSynth to be with ExprFront for performance reasons.

* X-Pressive plugin - moved the patched file back to the source tree, added .gitignore file..

* X-Pressive plugin - fix compilation error. (isnan isinf)

* X-Pressive plugin - tried to fix embed.cpp problem,
added new variable to the parser (tempo)

* X-Pressive plugin - fixed cmake script

* X-Pressive plugin - updated the license and the diff file.

* Updates to ExprTk

* Added return statement enable/disable via parser settings

Added exprtk_disable_return_statement macro for disabling return statements and associated exceptions at the source code level.

* X-Pressive plugin - updated CMakeLists.txt to use the correct flags on each platform.
also added exprtk.hpp as a dependency for the patch command.
Updated the exprtk diff file.

* X-Pressive plugin - moved the enhanced features flag to the WIN64 installation.

* X-Pressive plugin - another fix for CMakeLists.txt

* Minor updates to ExprTk

Updated multi-sub expression operator to return final sub-expression type.
Updates to exprtk_disable_return_statement macro for disabling return statements and associated exceptions at the source code level.

* X-Pressive plug-in - added try-block around exprtk calls and enabled the
-fexceptions flag, so patch file is no longer needed.

* X-Pressive plug-in - small fix in CMakeLists.txt

* Update ExprTk to tip of branch.

* X-Pressive plugin - added graph drawing feature..

* Updating exprtk.hpp to the latest upstream version

cmake/modules/BuildPlugin.cmake

@@ -9,7 +9,7 @@ MACRO(BUILD_PLUGIN PLUGIN_NAME)
 	CMAKE_PARSE_ARGUMENTS(PLUGIN "" "" "MOCFILES;EMBEDDED_RESOURCES;UICFILES;LINK" ${ARGN})
 	SET(PLUGIN_SOURCES ${PLUGIN_UNPARSED_ARGUMENTS})
 
-	INCLUDE_DIRECTORIES(${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_BINARY_DIR} ${CMAKE_SOURCE_DIR}/include ${CMAKE_SOURCE_DIR}/src/gui)
+	INCLUDE_DIRECTORIES(${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_BINARY_DIR} ${CMAKE_SOURCE_DIR}/include)
 
 	ADD_DEFINITIONS(-DPLUGIN_NAME=${PLUGIN_NAME})
 

include/Graph.h

@@ -79,7 +79,8 @@ class EXPORT Graph : public QWidget, public ModelView
 		update();
 	}
 
-
+signals:
+	void drawn();
 protected:
 	virtual void paintEvent( QPaintEvent * _pe );
 	virtual void dropEvent( QDropEvent * _de );
@@ -145,6 +146,8 @@ class EXPORT graphModel : public Model
 		return( m_samples.data() );
 	}
 
+	void convolve(const float *convolution, const int convolutionLength, const int centerOffset);
+
 public slots:
 	void setRange( float _min, float _max );
 
@@ -165,6 +168,7 @@ public slots:
 	void normalize();
 	void invert();
 	void shiftPhase( int _deg );
+	void clear();
 
 signals:
 	void lengthChanged();

plugins/CMakeLists.txt

@@ -80,6 +80,7 @@ IF("${PLUGIN_LIST}" STREQUAL "")
 		watsyn
 		waveshaper
 		vibed
+		xpressive
 		zynaddsubfx
 	)
 

plugins/xpressive/.gitignore

@@ -0,0 +1,2 @@
+#ignore the patched file
+exprtk.patched.hpp

plugins/xpressive/CMakeLists.txt

@@ -0,0 +1,10 @@
+INCLUDE(BuildPlugin)
+
+SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Dexprtk_disable_sc_andor -Dexprtk_disable_return_statement -Dexprtk_disable_break_continue -Dexprtk_disable_comments -Dexprtk_disable_string_capabilities -Dexprtk_disable_rtl_io_file -Dexprtk_disable_rtl_vecops ${WERROR_FLAGS} -fexceptions")
+
+IF(WIN32)
+	SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wa,-mbig-obj -Dexprtk_disable_enhanced_features")
+ENDIF()
+
+BUILD_PLUGIN(xpressive expressive_plugin.cpp exprsynth.cpp expressive_plugin.h exprtk.hpp MOCFILES expressive_plugin.h EMBEDDED_RESOURCES "${CMAKE_CURRENT_SOURCE_DIR}/*.png")
+

plugins/xpressive/MIT

@@ -0,0 +1,17 @@
+Copyrights for exprtk.hpp
+
+Permission is hereby granted, free of charge, 
+to any person obtaining a copy of this software and associated documentation files (the "Software"), 
+to deal in the Software without restriction, including without limitation the rights to use, copy, 
+modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit 
+persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 
+OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.