Add preliminary C++ work.

7 files changed, 213 insertions, 2 deletions

diff --git a/plugins/eg-amppp.lv2/README.txt b/plugins/eg-amppp.lv2/README.txt
new file mode 100644
index 0000000..a5cb36c
--- /dev/null
+++ b/plugins/eg-amppp.lv2/README.txt
@@ -0,0 +1,3 @@
+== Simple C++ Amplifier ==
+
+This is a version of the simple amplifier example, but written in C++.
diff --git a/plugins/eg-amppp.lv2/amppp.cpp b/plugins/eg-amppp.lv2/amppp.cpp
new file mode 100644
index 0000000..ac939c0
--- /dev/null
+++ b/plugins/eg-amppp.lv2/amppp.cpp
@@ -0,0 +1,78 @@
+/*
+  Copyright 2015 David Robillard <d@drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include <math.h>
+#include <stdlib.h>
+
+#include "lv2/lv2plug.in/ns/lv2core/Plugin.hpp"
+
+class Amppp : public lv2::Plugin {
+public:
+	Amppp(double                    rate,
+	      const char*               bundle_path,
+	      const LV2_Feature* const* features)
+		: Plugin(rate, bundle_path, features)
+	{}
+
+	typedef enum {
+		AMP_GAIN   = 0,
+		AMP_INPUT  = 1,
+		AMP_OUTPUT = 2
+	} PortIndex;
+
+	void connect_port(uint32_t port, void* data) {
+		switch ((PortIndex)port) {
+		case AMP_GAIN:
+			m_ports.gain = (const float*)data;
+			break;
+		case AMP_INPUT:
+			m_ports.input = (const float*)data;
+			break;
+		case AMP_OUTPUT:
+			m_ports.output = (float*)data;
+			break;
+		}
+	}
+
+	#define DB_CO(g) ((g) > -90.0f ? powf(10.0f, (g) * 0.05f) : 0.0f)
+
+	void run(uint32_t n_samples) {
+		const float coef = DB_CO(*m_ports.gain);
+		for (uint32_t pos = 0; pos < n_samples; pos++) {
+			m_ports.output[pos] = m_ports.input[pos] * coef;
+		}
+	}
+
+private:
+	typedef struct {
+		const float* gain;
+		const float* input;
+		float*       output;
+	} Ports;
+
+	Ports m_ports;
+};
+
+static const LV2_Descriptor descriptor = lv2::descriptor<Amppp>("http://lv2plug.in/plugins/eg-amppp");
+
+LV2_SYMBOL_EXPORT const LV2_Descriptor*
+lv2_descriptor(uint32_t index)
+{
+	switch (index) {
+	case 0:  return &descriptor;
+	default: return NULL;
+	}
+}
diff --git a/plugins/eg-amppp.lv2/amppp.ttl b/plugins/eg-amppp.lv2/amppp.ttl
new file mode 100644
index 0000000..1d90459
--- /dev/null
+++ b/plugins/eg-amppp.lv2/amppp.ttl
@@ -0,0 +1,49 @@
+@prefix doap:  <http://usefulinc.com/ns/doap#> .
+@prefix lv2:   <http://lv2plug.in/ns/lv2core#> .
+@prefix rdf:   <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
+@prefix rdfs:  <http://www.w3.org/2000/01/rdf-schema#> .
+@prefix units: <http://lv2plug.in/ns/extensions/units#> .
+
+<http://lv2plug.in/plugins/eg-amppp>
+	a lv2:Plugin ,
+		lv2:AmplifierPlugin ;
+	lv2:project <http://lv2plug.in/ns/lv2> ;
+	doap:name "Simple C++ Amplifier" ;
+	doap:license <http://opensource.org/licenses/isc> ;
+	lv2:optionalFeature lv2:hardRTCapable ;
+	lv2:port [
+		a lv2:InputPort ,
+			lv2:ControlPort ;
+		lv2:index 0 ;
+		lv2:symbol "gain" ;
+		lv2:name "Gain" ;
+		lv2:default 0.0 ;
+		lv2:minimum -90.0 ;
+		lv2:maximum 24.0 ;
+		units:unit units:db ;
+		lv2:scalePoint [
+			rdfs:label "+5" ;
+			rdf:value 5.0
+		] , [
+			rdfs:label "0" ;
+			rdf:value 0.0
+		] , [
+			rdfs:label "-5" ;
+			rdf:value -5.0
+		] , [
+			rdfs:label "-10" ;
+			rdf:value -10.0
+		]
+	] , [
+		a lv2:AudioPort ,
+			lv2:InputPort ;
+		lv2:index 1 ;
+		lv2:symbol "in" ;
+		lv2:name "In"
+	] , [
+		a lv2:AudioPort ,
+			lv2:OutputPort ;
+		lv2:index 2 ;
+		lv2:symbol "out" ;
+		lv2:name "Out"
+	] .
diff --git a/plugins/eg-amppp.lv2/manifest.ttl.in b/plugins/eg-amppp.lv2/manifest.ttl.in
new file mode 100644
index 0000000..4985490
--- /dev/null
+++ b/plugins/eg-amppp.lv2/manifest.ttl.in
@@ -0,0 +1,7 @@
+@prefix lv2:  <http://lv2plug.in/ns/lv2core#> .
+@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
+
+<http://lv2plug.in/plugins/eg-amppp>
+	a lv2:Plugin ;
+	lv2:binary <amppp@LIB_EXT@>  ;
+	rdfs:seeAlso <amppp.ttl> .
diff --git a/plugins/eg-amppp.lv2/waf b/plugins/eg-amppp.lv2/waf
new file mode 120000
index 0000000..59a1ac9
--- /dev/null
+++ b/plugins/eg-amppp.lv2/waf
@@ -0,0 +1 @@
+../../waf
\ No newline at end of file
diff --git a/plugins/eg-amppp.lv2/wscript b/plugins/eg-amppp.lv2/wscript
new file mode 100644
index 0000000..27b1039
--- /dev/null
+++ b/plugins/eg-amppp.lv2/wscript
@@ -0,0 +1,66 @@
+#!/usr/bin/env python
+from waflib.extras import autowaf as autowaf
+import re
+
+# Variables for 'waf dist'
+APPNAME = 'eg-amppp.lv2'
+VERSION = '1.0.0'
+
+# Mandatory variables
+top = '.'
+out = 'build'
+
+def options(opt):
+    opt.load('compiler_cxx')
+    autowaf.set_options(opt)
+
+def configure(conf):
+    conf.load('compiler_cxx')
+    autowaf.configure(conf)
+    autowaf.set_c99_mode(conf)
+    autowaf.display_header('Amppp Configuration')
+
+    if not autowaf.is_child():
+        autowaf.check_pkg(conf, 'lv2', uselib_store='LV2')
+
+    conf.check(features='cxx cxxshlib', lib='m', uselib_store='M', mandatory=False)
+
+    autowaf.display_msg(conf, 'LV2 bundle directory', conf.env.LV2DIR)
+    print('')
+
+def build(bld):
+    bundle = 'eg-amppp.lv2'
+
+    # Make a pattern for shared objects without the 'lib' prefix
+    module_pat = re.sub('^lib', '', bld.env.cshlib_PATTERN)
+    module_ext = module_pat[module_pat.rfind('.'):]
+
+    # Build manifest.ttl by substitution (for portable lib extension)
+    bld(features     = 'subst',
+        source       = 'manifest.ttl.in',
+        target       = '%s/%s' % (bundle, 'manifest.ttl'),
+        install_path = '${LV2DIR}/%s' % bundle,
+        LIB_EXT      = module_ext)
+
+    # Copy other data files to build bundle (build/eg-amppp.lv2)
+    for i in ['amppp.ttl']:
+        bld(features     = 'subst',
+            is_copy      = True,
+            source       = i,
+            target       = '%s/%s' % (bundle, i),
+            install_path = '${LV2DIR}/%s' % bundle)
+
+    # Use LV2 headers from parent directory if building as a sub-project
+    includes = None
+    if autowaf.is_child:
+        includes = '../..'
+
+    # Build plugin library
+    obj = bld(features     = 'cxx cxxshlib',
+              source       = 'amppp.cpp',
+              name         = 'amppp',
+              target       = '%s/amppp' % bundle,
+              install_path = '${LV2DIR}/%s' % bundle,
+              uselib       = 'M LV2',
+              includes     = includes)
+    obj.env.cxxshlib_PATTERN = module_pat
diff --git a/plugins/wscript b/plugins/wscript
index f099183..28e5e02 100644
--- a/plugins/wscript
+++ b/plugins/wscript
@@ -15,7 +15,7 @@ def bld_book_src(task):
         filenames += [i.abspath()]
 
     literasc.gen(open(task.outputs[0].abspath(), 'w'), filenames)
-    
+
 def build(bld):
     files = [bld.path.find_node('README.txt')]
     for i in ['eg-amp.lv2',
@@ -29,6 +29,14 @@ def build(bld):
         files += bld.path.ant_glob('%s/*.ttl' % i)
         files += bld.path.ant_glob('%s/*.c' % i)
 
+    if bld.env.BUILD_CXX:
+        for i in ['eg-amppp.lv2']:
+            print i
+            files += bld.path.ant_glob('%s/*.txt' % i)
+            files += bld.path.ant_glob('%s/manifest.ttl*' % i)
+            files += bld.path.ant_glob('%s/*.ttl' % i)
+            files += bld.path.ant_glob('%s/*.cpp' % i)
+
     # Compile book sources into book.txt asciidoc source
     bld(rule   = bld_book_src,
         source = files,
@@ -41,4 +49,3 @@ def build(bld):
         stylesdir, pygments_style),
         source = 'book.txt',
         target = 'book.html')
-