From df97e0ebb7f6591c50f3a588cb2a74901d38ac4a Mon Sep 17 00:00:00 2001
From: Florian Jung <flo@thinkpad.(none)>
Date: Sun, 9 Jan 2011 19:09:05 +0100
Subject: Merged branch for compiled notes

The synthesizer is now able to load and use compiled, optimized shared
objects of programs. There's also a note-compiler which creates the code
for such objects.

TODO:
  - let the note-compiler automatically compile OR rename it to
    code-emitter
---
 synth/note_loader.cpp | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 synth/note_loader.cpp

(limited to 'synth/note_loader.cpp')

diff --git a/synth/note_loader.cpp b/synth/note_loader.cpp
new file mode 100644
index 0000000..28613b9
--- /dev/null
+++ b/synth/note_loader.cpp
@@ -0,0 +1,54 @@
+
+#include <iostream>
+#include <dlfcn.h>
+
+#include "note_loader.h"
+#include "programs.h"
+#include "note_funcs.h"
+#include "globals.h"
+
+using namespace std;
+
+void load_note_from_so(string file, program_t &prog)
+{
+	void *handle;
+	
+	handle = dlopen(file.c_str(), RTLD_LAZY);
+	
+	if (handle==NULL)
+		throw string("could not open shared object (")+string(dlerror())+string(")");
+	
+	try
+	{
+		prog.create_func=(create_func_t*) dlsym(handle,"create_note");
+		if (prog.create_func==NULL)
+			throw string("could not find symbol create_note in shared object (")+dlerror()+")";	
+
+		init_func_t* initfunc=(init_func_t*) dlsym(handle,"init_vars");
+		if (initfunc==NULL)
+			throw string("could not find symbol init_vars in shared object (")+dlerror()+")";	
+		
+		initfunc(samp_rate, filter_update_frames, wave, curr_lfo, &output_note, &IntToStr);
+		
+
+		
+		prog.dl_handle=handle;
+	}
+	catch (string err)
+	{
+		prog.create_func=NULL;
+		prog.dl_handle=NULL;
+		dlclose(handle);
+		throw err;
+	}
+}
+
+void maybe_unload_note(program_t &prog)
+{
+	if (prog.dl_handle)
+	{
+		dlclose(prog.dl_handle);
+		prog.dl_handle=NULL;
+		prog.create_func=NULL;
+	}
+}
-- 
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