first commit - working clone of the 'normalize' NRT buffer instance method

Author: tremblap

.gitignore

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+build
+**/.DS_Store

BufRev.cpp

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+// BufRev, an NRT buffer samples swapper
+// Pierre Alexandre Tremblay, 2018
+// A digital debris of the FluCoMa project, funded by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 725899)
+
+#include "SC_PlugIn.h"
+
+static InterfaceTable *ft;
+
+static void normalize_samples(int size, float* data, float peak)
+{
+	float maxamp = 0.f;
+	for (int i=0; i<size; ++i) {
+		float absamp = std::abs(data[i]);
+		if (absamp > maxamp) maxamp = absamp;
+	}
+	if (maxamp != 0.f && maxamp != peak) {
+		float ampfac = peak / maxamp;
+		for (int i=0; i<size; ++i) {
+			data[i] *= ampfac;
+		}
+	}
+}
+
+void BufRev(World *world, struct SndBuf *buf, struct sc_msg_iter *msg)
+{
+	float newmax;
+	if(msg->remain() != 0){
+		newmax = msg->getf();
+	}else{
+		newmax = 1.f;
+	}
+	float *data = buf->data;
+	int size = buf->samples;
+	normalize_samples(size, data, newmax);
+}
+
+PluginLoad(BufRevUGens) {
+  ft = inTable;
+  DefineBufGen("reverse", BufRev);
+}

BufRev.sc

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++ Buffer {
+	reverse { arg newmax=1;
+		if(bufnum.isNil) { Error("Cannot call % on a % that has been freed".format(thisMethod.name, this.class.name)).throw };
+		server.listSendMsg([\b_gen, bufnum, "reverse", newmax])
+	}
+}
+

CMakeLists.txt

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+cmake_minimum_required (VERSION 2.8)
+set(PROJECT "BufRev")
+project (${PROJECT})
+
+include_directories(${SC_PATH}/include/plugin_interface)
+include_directories(${SC_PATH}/include/common)
+include_directories(${SC_PATH}/common)
+
+
+set(CMAKE_SHARED_MODULE_PREFIX "")
+if(APPLE OR WIN32)
+set(CMAKE_SHARED_MODULE_SUFFIX ".scx")
+endif()
+
+option(CPP11 "Build with c++11." ON)
+
+if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_COMPILER_IS_CLANG)
+    add_definitions(-fvisibility=hidden)
+
+    include (CheckCCompilerFlag)
+    include (CheckCXXCompilerFlag)
+
+    CHECK_C_COMPILER_FLAG(-msse HAS_SSE)
+    CHECK_CXX_COMPILER_FLAG(-msse HAS_CXX_SSE)
+
+    if (HAS_SSE)
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -msse")
+    endif()
+    if (HAS_CXX_SSE)
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse")
+    endif()
+
+    CHECK_C_COMPILER_FLAG(-msse2 HAS_SSE2)
+    CHECK_CXX_COMPILER_FLAG(-msse2 HAS_CXX_SSE2)
+
+    if (HAS_SSE2)
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -msse2")
+    endif()
+    if (HAS_CXX_SSE2)
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse2")
+    endif()
+
+    CHECK_C_COMPILER_FLAG(-mfpmath=sse HAS_FPMATH_SSE)
+    CHECK_CXX_COMPILER_FLAG(-mfpmath=sse HAS_CXX_FPMATH_SSE)
+
+    if (HAS_FPMATH_SSE)
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfpmath=sse")
+    endif()
+    if (HAS_CXX_FPMATH_SSE)
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mfpmath=sse")
+    endif()
+
+    if(NATIVE)
+        add_definitions(-march=native)
+    endif()
+
+    if(CPP11)
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+        if(CMAKE_COMPILER_IS_CLANG)
+            set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
+        endif()
+    endif()
+endif()
+if(MINGW)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mstackrealign")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mstackrealign")
+endif()
+
+add_library(${PROJECT} MODULE BufRev.cpp)

tests.scd

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+b = Buffer.alloc(s,16);
+b.setn(0, Array.fill(16, {0.1.rand2}));
+
+b.plot
+
+b.reverse
+
+b.plot