Création du source tree princpal. Les routines de maths pour calculer le gain déconnent encore je trouve.

Reste à intégrer la partie DMX et a améliorer tout ce qui a été laissé de côté...


git-svn-id: file:///var/svn/2012-violon-leds/trunk@20 6be1fa4d-33ac-4c33-becc-79fcb3794bb6

15 files changed, 1510 insertions, 0 deletions

diff --git a/src/LICENSE.txt b/src/LICENSE.txt
new file mode 100644
index 0000000..ec091c1
--- /dev/null
+++ b/src/LICENSE.txt
@@ -0,0 +1,342 @@
+
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
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+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
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+You may charge a fee for the physical act of transferring a copy, and
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+These requirements apply to the modified work as a whole.  If
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+If any portion of this section is held invalid or unenforceable under
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+
+This section is intended to make thoroughly clear what is believed to
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+
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+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
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+Foundation.
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+  10. If you wish to incorporate parts of the Program into other free
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+			    NO WARRANTY
+
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+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) 19yy  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
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+
+    Gnomovision version 69, Copyright (C) 19yy name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
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+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.
+
diff --git a/src/Makefile b/src/Makefile
new file mode 100644
index 0000000..67d7035
--- /dev/null
+++ b/src/Makefile
@@ -0,0 +1,29 @@
+CC=gcc
+CFLAGS=-W -Wall -Werror -Wno-error=unused-parameter -g
+LDFLAGS=-Werror -g
+EXEC=music2light
+
+CFLAGS+=$(shell pkg-config --cflags gtk+-2.0 gthread-2.0 libpulse)
+LDFLAGS+=-lm $(shell pkg-config --libs gtk+-2.0 gthread-2.0 libpulse)
+
+SRC= $(wildcard *.c)
+OBJ= $(SRC:.c=.o)
+
+all: $(EXEC)
+
+$(EXEC): $(OBJ)
+	$(CC) -o $@ $^ $(LDFLAGS)
+
+#main.o: hello.h
+
+%.o: %.c
+	$(CC) -o $@ -c $< $(CFLAGS)
+
+.PHONY: clean mrproper
+
+clean:
+	rm *.o
+
+mrproper: clean
+	rm $(EXEC)
+
diff --git a/src/capture.c b/src/capture.c
new file mode 100644
index 0000000..e8ca2fd
--- /dev/null
+++ b/src/capture.c
@@ -0,0 +1,203 @@
+#include "capture.h"
+#include <pulse/pulseaudio.h>
+#include <gtk/gtk.h>
+
+#define APP_TITLE "Test 5 lpo"
+#define BUFSIZE 1024
+
+extern void my_process(float *data, size_t nsamples, size_t nchan);
+
+capture_sound_level_cb_t *capture_sound_level_cb=NULL;
+
+int capture_init(pa_mainloop **m, pa_context **c);
+void context_state_callback(pa_context *c, void *userdata);
+void context_get_server_info_callback(pa_context *c, const pa_server_info*si, void *userdata);
+void context_get_source_info_callback(pa_context *c, const pa_source_info *si, int is_last, void *userdata);
+pa_stream * create_stream(pa_context *c, const pa_source_info *si);
+void stream_state_callback(pa_stream *s, void *userdata);
+void stream_read_callback(pa_stream *s, size_t nbytes, void *userdata);
+
+char *device_name=NULL;
+
+// Main procedure of this thread
+void audio_thread(void *args) {
+	pa_context *c;
+	pa_mainloop *m;
+	int res, retval;
+
+	capture_sound_level_cb=(capture_sound_level_cb_t *)args;
+
+	//printf("debug : args==%p capture_sound_level_cb==%p\n", args, capture_sound_level_cb);
+	
+	res=capture_init(&m, &c);
+	g_assert(res==0);
+
+	res=pa_mainloop_run(m,&retval);
+	g_assert(res==0);
+	g_assert(retval==0);
+
+//	pa_context_disconnect(pa_ct);
+	pa_mainloop_free(m);
+}
+
+int capture_init(pa_mainloop **m, pa_context **c) {
+	int res=0;
+
+	*m=pa_mainloop_new();
+	g_assert(*m);
+
+        *c = pa_context_new(pa_mainloop_get_api(*m), APP_TITLE);
+	g_assert(*c);
+
+	pa_context_set_state_callback(*c, context_state_callback, NULL);
+	res=pa_context_connect(*c, NULL, PA_CONTEXT_NOAUTOSPAWN, NULL);
+
+	return res;
+}
+
+void context_state_callback(pa_context *c, void *userdata) {
+	switch (pa_context_get_state(c)) {
+		case PA_CONTEXT_UNCONNECTED:
+			printf("PA_CONTEXT_UNCONNECTED\n");
+			break;
+		case PA_CONTEXT_CONNECTING:
+			printf("PA_CONTEXT_CONNECTING\n");
+			break;
+		case PA_CONTEXT_AUTHORIZING:
+			printf("PA_CONTEXT_AUTHORIZING\n");
+			break;
+		case PA_CONTEXT_SETTING_NAME:
+			printf("PA_CONTEXT_SETTING_NAME\n");
+			break;
+		case PA_CONTEXT_READY:
+			printf("PA_CONTEXT_READY\n");
+//			if (!device_name) {
+				pa_operation_unref(pa_context_get_server_info(c, context_get_server_info_callback, NULL));
+/*			} else {
+				pa_operation_unref(pa_context_get_source_info_by_name(c, device_name, context_get_source_info_callback, NULL));
+			}
+*/
+			break;
+
+		case PA_CONTEXT_FAILED:
+			printf("PA_CONTEXT_FAILED\n");
+			break;
+
+		case PA_CONTEXT_TERMINATED:
+			printf("PA_CONTEXT_TERMINATED\n");
+			break;
+	}
+}
+
+void context_get_server_info_callback(pa_context *c, const pa_server_info*si, void *userdata) {
+	if (!si) {
+		printf("Failed to get server information\n");
+		return;
+	}
+
+	if (!si->default_source_name) {
+		printf("No default source set\n");
+		return;
+	}
+
+	pa_operation_unref(pa_context_get_source_info_by_name(c, si->default_source_name, context_get_source_info_callback, NULL));
+
+}
+
+void context_get_source_info_callback(pa_context *c, const pa_source_info *si, int is_last, void *userdata) {
+
+	if (is_last < 0) {
+		printf("Failed to get sink information\n");
+		return;
+	}
+
+	if (!si) {
+		return;
+	}
+
+	create_stream(c,si);
+}
+
+pa_stream *create_stream(pa_context *c, const pa_source_info *si) {
+	static const pa_buffer_attr ba={
+		.maxlength=-1,
+		.tlength=1024,
+		.prebuf=-1,
+		.minreq=-1,
+	//	.minreq=256, //For FFT calculus
+		.fragsize=512
+	};
+
+	pa_sample_spec nss = {
+		.format = PA_SAMPLE_FLOAT32LE,
+		.rate = si->sample_spec.rate,
+		.channels = si->sample_spec.channels
+	};
+
+	pa_stream *stream=NULL;
+	//pa_proplist *pl=NULL;
+	char t[256];
+
+/*
+	pa_channel_map cmap;
+	pa_channel_map_init_mono(&cmap);
+	//pa_channel_map_init_stereo(&cmap);
+*/
+
+	printf("Source : %s (%s)\n", si->name, si->description);
+	printf("Using sample format: %s\n", pa_sample_spec_snprint(t, sizeof(t), &nss));
+	printf("Using channel map: %s\n", pa_channel_map_snprint(t, sizeof(t), &(si->channel_map)));
+/*
+	pl=pa_proplist_new();
+	pa_proplist_set(pl, "maxlength", &pl_maxlength, sizeof(pl_maxlength));
+	pa_proplist_set(pl, "tlength", &pl_tlength, sizeof(pl_tlength));
+	pa_proplist_set(pl, "fragsize", &pl_fragsize, sizeof(pl_fragsize));
+*/
+	stream=pa_stream_new(c, APP_TITLE, &nss, &(si->channel_map));
+	//stream=pa_stream_new_with_proplist(c, APP_TITLE, &(si->sample_spec), &(si->channel_map), pl);
+	pa_stream_set_state_callback(stream, stream_state_callback, NULL);
+	pa_stream_set_read_callback(stream, stream_read_callback, NULL);
+	//pa_stream_connect_record(stream, APP_TITLE, NULL, (enum pa_stream_flags) 0);
+	pa_stream_connect_record(stream, si->name, &ba, PA_STREAM_ADJUST_LATENCY);
+
+	return stream;
+}
+
+void stream_state_callback(pa_stream *s, void *userdata) {
+	switch (pa_stream_get_state(s)) {
+		case PA_STREAM_UNCONNECTED:
+			printf("PA_STREAM_UNCONNECTED\n");
+			break;
+		case PA_STREAM_CREATING:
+			printf("PA_STREAM_CREATING\n");
+			break;
+		case PA_STREAM_READY:
+			printf("PA_STREAM_READY\n");
+			//g_timeout_add(100, latency_func, NULL);
+			//pa_operation_unref(pa_stream_update_timing_info(stream, stream_update_timing_info_callback, NULL));
+			break;
+		case PA_STREAM_FAILED:
+			printf("PA_STREAM_FAILED\n");
+			break;
+		case PA_STREAM_TERMINATED:
+			printf("PA_STREAM_TERMINATED\n");
+			break;
+	}
+}
+
+void stream_read_callback(pa_stream *s, size_t nbytes, void *userdata) {
+	const void *p;
+	//printf("stream_read_callback %i\n", nbytes);
+
+	if (pa_stream_peek(s, &p, &nbytes) < 0) {
+		printf("pa_stream_peek() failed\n");//: %s", pa_strerror(pa_context_errno(context)));
+		return;
+	}
+
+//printf("debug : before call capture_sound_level_cb==%p\n", capture_sound_level_cb);
+	my_process((float *)p,nbytes/sizeof(float), pa_stream_get_sample_spec(s)->channels);
+//printf("debug : after call capture_sound_level_cb==%p\n", capture_sound_level_cb);
+
+	pa_stream_drop(s);
+}
+
diff --git a/src/capture.h b/src/capture.h
new file mode 100644
index 0000000..2acbe09
--- /dev/null
+++ b/src/capture.h
@@ -0,0 +1,9 @@
+#ifndef CAPTURE_H
+#define CAPTURE_H
+#include <gtk/gtk.h>
+
+typedef void(* capture_sound_level_cb_t)(gint sound_level, void *userdata);
+
+void audio_thread(void *args);
+
+#endif /*CAPTURE_H*/
diff --git a/src/compute.c b/src/compute.c
new file mode 100644
index 0000000..272d6f8
--- /dev/null
+++ b/src/compute.c
@@ -0,0 +1,116 @@
+#include "compute.h"
+
+#include "fft.h"
+#include <math.h>
+
+#define MIN_SAMPLES 256
+#define MAX_SAMPLES 2048
+
+//#define MAX(a,b) (a>b?a:b)
+//#define MIN(a,b) (a<b?a:b)
+
+//static inline float todB_a(const float *x);
+void compute_spectrum(float *data, int width, float output[PSHalf]);
+
+
+float compute_level(const float *data, size_t nsamples, int rate) {
+
+	size_t i; 
+	float input[MAX_SAMPLES], pwrspec[PSHalf];
+	float value;
+	int f, min_f_index, max_f_index;
+
+	if (nsamples >= MAX_SAMPLES) {
+		printf("WARN : nsamples >= MAX_SAMPLES : %i >= %i\n", nsamples, MAX_SAMPLES);
+		nsamples=MAX_SAMPLES;
+	}
+	if (nsamples < MIN_SAMPLES) {
+		printf("WARN : nsamples < MIN_SAMPLES : %i >= %i\n", nsamples, MIN_SAMPLES);
+		// Replicate with symmetry the sound to obtain an input buffer of the minimal len
+		for (i=0;i<MIN_SAMPLES;i++) {
+			if ( (i/nsamples)%2==1 )
+				input[i]=data[i]; // First channel only
+			else
+				input[i]=data[nsamples-i-1];
+		}
+		nsamples=MIN_SAMPLES;
+	} else {
+		for (i=0;i<nsamples;i++) {
+			input[i]=data[i]; // First channel only
+		}
+	}
+
+	compute_spectrum(input, nsamples, pwrspec);
+
+	// Compute the mean power for 200Hz to 2000Hz band
+	min_f_index=((float)PSHalf)*200.f/(((float)rate)/2.f);
+	max_f_index=((float)PSHalf)*2000.f/(((float)rate)/2.f);
+
+	value=0.f;
+	for (f=min_f_index;f<=max_f_index;f++) {
+		value+=pwrspec[f];
+	}
+	// Mean value
+	value=value/(max_f_index-min_f_index+1);
+
+	return value;
+}
+/*
+static inline float todB_a(const float *x){
+  return (float)((*(int32_t *)x)&0x7fffffff) * 7.17711438e-7f -764.6161886f;
+}
+*/
+// Adapted from Audacity 
+void compute_spectrum(float *data, int width, float output[PSHalf]) {
+
+	int i, start, windows;
+	float temp;
+	float in[PSNumS];
+	float out[PSHalf];
+	float processed[PSHalf]={0.0f};
+
+	start = 0;
+	windows = 0;
+	while (start + PSNumS <= width) {
+		// Windowing : Hanning
+		for (i=0; i<PSNumS; i++)
+			in[i] = data[start+i] *(0.50-0.50*cos(2*M_PI*i/(PSNumS-1)));
+
+		// Returns only the real part of the result
+		PowerSpectrum(in, out);
+
+		for (i=0; i<PSHalf; i++)
+			processed[i] += out[i];
+
+		start += PSHalf;
+		windows++;
+	}
+	// Convert to decibels
+	// But do it safely; -Inf is nobody's friend
+	for (i = 0; i < PSHalf; i++){
+		temp=(processed[i] / PSNumS / windows);
+		if (temp > 0.0)
+			output[i] = 10*log10(temp);
+		else
+			output[i] = 0;
+	}
+}
+
+void audio2hsv_1(float audio_level, float *light_h, float *light_s, float *light_v) {
+	static float hue=0;
+
+	float level_norm=(50.f+audio_level)/30.f;
+
+	if (level_norm<0.f) level_norm=0.f;
+	if (level_norm>1.f) level_norm=1.f;
+	hue=(hue+0.0002f);
+	if (hue>1.f) hue-=1.f;
+
+	printf("%+3.1f %+1.3f\n", audio_level, level_norm);
+
+	// Dummy code
+	*light_h=hue;
+	*light_s=1.f;
+	*light_v=level_norm;
+}
+
diff --git a/src/compute.h b/src/compute.h
new file mode 100644
index 0000000..23d5798
--- /dev/null
+++ b/src/compute.h
@@ -0,0 +1,10 @@
+#ifndef COMPUTE_H
+#define COMPUTE_H
+#include <stdlib.h> // for size_t
+#include <stdio.h> // for printf
+
+float compute_level(const float *data, size_t nsamples, int rate);
+void audio2hsv_1(float audio_level, float *light_h, float *light_s, float *light_v);
+
+#endif
+
diff --git a/src/fft.c b/src/fft.c
new file mode 100644
index 0000000..dd91d14
--- /dev/null
+++ b/src/fft.c
@@ -0,0 +1,241 @@
+#include "fft.h"
+#include <math.h>
+#include <stdlib.h>
+
+/* Everything here comes from Audacity 1.3.13
+ (orignally in C++ and with more genericity and functionnality)
+ Original Author : Dominic Mazzoni
+ Licenced under GPL 2.0 (see LICENCE)
+*/
+
+#define MaxFastBits 16
+
+int *gFFTBitTable[MaxFastBits]={NULL};
+
+void InitFFT();
+int NumberOfBitsNeeded(int PowerOfTwo);
+inline int FastReverseBits(int i, int NumBits);
+int ReverseBits(int index, int NumBits);
+
+
+void FFT(int NumSamples,
+		int InverseTransform,
+		float *RealIn, float *ImagIn, float *RealOut, float *ImagOut)
+{
+	int NumBits;                 /* Number of bits needed to store indices */
+	int i, j, k, n;
+	int BlockSize, BlockEnd;
+
+	double angle_numerator = 2.0 * M_PI;
+	double tr, ti;                /* temp real, temp imaginary */
+/*
+	if (!IsPowerOfTwo(NumSamples)) {
+		fprintf(stderr, "%d is not a power of two\n", NumSamples);
+		exit(1);
+	}
+*/
+	if (!gFFTBitTable[0])
+		InitFFT();
+
+	if (!InverseTransform)
+		angle_numerator = -angle_numerator;
+
+	NumBits = NumberOfBitsNeeded(NumSamples);
+
+	/*
+	 **   Do simultaneous data copy and bit-reversal ordering into outputs...
+	 */
+	for (i = 0; i < NumSamples; i++) {
+		j = FastReverseBits(i, NumBits);
+		RealOut[j] = RealIn[i];
+		ImagOut[j] = (ImagIn == NULL) ? 0.0 : ImagIn[i];
+	}
+
+	/*
+	 **   Do the FFT itself...
+	 */
+
+	BlockEnd = 1;
+	for (BlockSize = 2; BlockSize <= NumSamples; BlockSize <<= 1) {
+
+		double delta_angle = angle_numerator / (double) BlockSize;
+
+		double sm2 = sin(-2 * delta_angle);
+		double sm1 = sin(-delta_angle);
+		double cm2 = cos(-2 * delta_angle);
+		double cm1 = cos(-delta_angle);
+		double w = 2 * cm1;
+		double ar0, ar1, ar2, ai0, ai1, ai2;
+
+		for (i = 0; i < NumSamples; i += BlockSize) {
+			ar2 = cm2;
+			ar1 = cm1;
+
+			ai2 = sm2;
+			ai1 = sm1;
+
+			for (j = i, n = 0; n < BlockEnd; j++, n++) {
+				ar0 = w * ar1 - ar2;
+				ar2 = ar1;
+				ar1 = ar0;
+
+				ai0 = w * ai1 - ai2;
+				ai2 = ai1;
+				ai1 = ai0;
+
+				k = j + BlockEnd;
+				tr = ar0 * RealOut[k] - ai0 * ImagOut[k];
+				ti = ar0 * ImagOut[k] + ai0 * RealOut[k];
+
+				RealOut[k] = RealOut[j] - tr;
+				ImagOut[k] = ImagOut[j] - ti;
+
+				RealOut[j] += tr;
+				ImagOut[j] += ti;
+			}
+		}
+		BlockEnd = BlockSize;
+	}
+
+	/*
+	 **   Need to normalize if inverse transform...
+	 */
+
+	if (InverseTransform) {
+		float denom = (float) NumSamples;
+
+		for (i = 0; i < NumSamples; i++) {
+			RealOut[i] /= denom;
+			ImagOut[i] /= denom;
+		}
+	}
+}
+
+void InitFFT() {
+	int len=2;
+	int b, i;
+	for (b=0; b<MaxFastBits; b++) {
+		gFFTBitTable[b]=malloc(len*sizeof(int));
+
+		for (i=0; i<len; i++)
+			gFFTBitTable[b][i] = ReverseBits(i, b+1);
+
+		len <<= 1;
+	}
+}
+
+int NumberOfBitsNeeded(int PowerOfTwo)
+{
+	int i;
+
+/*
+	if (PowerOfTwo < 2) {
+		fprintf(stderr, "Error: FFT called with size %d\n", PowerOfTwo);
+		exit(1);
+	}
+*/
+	for (i = 0;; i++)
+		if (PowerOfTwo & (1 << i))
+			return i;
+}
+
+inline int FastReverseBits(int i, int NumBits)
+{
+	if (NumBits <= MaxFastBits)
+		return gFFTBitTable[NumBits - 1][i];
+	else
+		return ReverseBits(i, NumBits);
+}
+
+int ReverseBits(int index, int NumBits)
+{
+   int i, rev;
+
+   for (i = rev = 0; i < NumBits; i++) {
+      rev = (rev << 1) | (index & 1);
+      index >>= 1;
+   }
+
+   return rev;
+}
+
+
+/*
+ * PowerSpectrum
+ *
+ * This function computes the same as RealFFT, above, but
+ * adds the squares of the real and imaginary part of each
+ * coefficient, extracting the power and throwing away the
+ * phase.
+ *
+ * For speed, it does not call RealFFT, but duplicates some
+ * of its code.
+ */
+
+void PowerSpectrum(float In[PSNumS], float Out[PSHalf]) {
+	int i;
+
+	float theta = M_PI / PSHalf;
+
+	float tmpReal[PSHalf];
+	float tmpImag[PSHalf];
+	float RealOut[PSHalf];
+	float ImagOut[PSHalf];
+
+	for (i=0; i<PSHalf; i++) {
+		tmpReal[i] = In[2*i];
+		tmpImag[i] = In[2*i+1];
+	}
+
+	FFT(PSHalf, 0, tmpReal, tmpImag, RealOut, ImagOut);
+
+	float wtemp = sin(0.5 * theta);
+
+	float wpr = -2.0 * wtemp * wtemp;
+	float wpi = -1.0 * sin(theta);
+	float wr = 1.0 + wpr;
+	float wi = wpi;
+
+	int i3;
+
+	float h1r, h1i, h2r, h2i, rt, it;
+	for (i=1; i < PSHalf/2; i++) {
+
+		i3 = PSHalf - i;
+
+		h1r = 0.5 * (RealOut[i] + RealOut[i3]);
+		h1i = 0.5 * (ImagOut[i] - ImagOut[i3]);
+		h2r = 0.5 * (ImagOut[i] + ImagOut[i3]);
+		h2i = -0.5 * (RealOut[i] - RealOut[i3]);
+
+		rt = h1r + wr * h2r - wi * h2i;
+		it = h1i + wr * h2i + wi * h2r;
+
+		Out[i] = rt * rt + it * it;
+
+		rt = h1r - wr * h2r + wi * h2i;
+		it = -h1i + wr * h2i + wi * h2r;
+
+		Out[i3] = rt * rt + it * it;
+
+		wr = (wtemp = wr) * wpr - wi * wpi + wr;
+		wi = wi * wpr + wtemp * wpi + wi;
+	}
+
+	rt = (h1r = RealOut[0]) + ImagOut[0];
+	it = h1r - ImagOut[0];
+	Out[0] = rt * rt + it * it;
+	rt = RealOut[PSHalf / 2];
+	it = ImagOut[PSHalf / 2];
+	Out[PSHalf / 2] = rt * rt + it * it;
+}
+
+void DeinitFFT() {
+	int i;
+	if (gFFTBitTable[0]) {
+		for (i=0;i<MaxFastBits;i++) {
+			free(gFFTBitTable[i]);
+		}
+	}
+}
+
diff --git a/src/fft.h b/src/fft.h
new file mode 100644
index 0000000..6066d52
--- /dev/null
+++ b/src/fft.h
@@ -0,0 +1,19 @@
+#ifndef FFT_H
+#define FFT_H
+
+/* Everything here comes from Audacity 1.3.13
+ (orignally in C++ and with more genericity and functionnality)
+ Original Author : Dominic Mazzoni
+ Licenced under GPL 2.0 (see LICENCE)
+*/
+
+#define PSNumS 256
+#define PSHalf 128
+void PowerSpectrum(float In[PSNumS], float Out[PSHalf]);
+
+void FFT(int NumSamples, int InverseTransform,
+	float *RealIn, float *ImagIn, float *RealOut, float *ImagOut);
+void DeinitFFT();
+
+#endif
+
diff --git a/src/gtkvumeter.c b/src/gtkvumeter.c
new file mode 100644
index 0000000..d57cc62
--- /dev/null
+++ b/src/gtkvumeter.c
@@ -0,0 +1,263 @@
+#include <string.h>
+#include "gtkvumeter.h"
+
+#define MIN_HORIZONTAL_VUMETER_WIDTH   40
+#define HORIZONTAL_VUMETER_HEIGHT  20
+#define VERTICAL_VUMETER_WIDTH     20
+#define MIN_VERTICAL_VUMETER_HEIGHT    40
+
+G_DEFINE_TYPE (GtkVuMeter, gtk_vu_meter, GTK_TYPE_DRAWING_AREA);
+
+static GdkColor default_f_gradient_keys[3] = {{0,65535,0,0},{0,65535,65535,0},{0,0,65535,0}};
+static GdkColor default_b_gradient_keys[3] = {{0,49151,0,0},{0,49151,49151,0},{0,0,49151,0}};
+
+static gboolean gtk_vu_meter_expose (GtkWidget *vumeter, GdkEventExpose *event);
+static void gtk_vu_meter_setup_colors (GtkVuMeter *vumeter);
+static void gtk_vu_meter_free_colors (GtkVuMeter *vumeter);
+static void free_drawbuf(guchar *pixels, gpointer data);
+static void gtk_vu_meter_size_request (GtkWidget *widget, GtkRequisition *requisition);
+static void gtk_vu_meter_size_allocate (GtkWidget *widget, GtkAllocation *allocation);
+static gint gtk_vu_meter_sound_level_to_draw_level (GtkVuMeter *vumeter);
+
+static void gtk_vu_meter_class_init (GtkVuMeterClass *class) {
+	GtkWidgetClass *widget_class;
+	widget_class = GTK_WIDGET_CLASS (class);
+	widget_class->expose_event = gtk_vu_meter_expose;
+	widget_class->size_request = gtk_vu_meter_size_request;
+	widget_class->size_allocate = gtk_vu_meter_size_allocate;    
+}
+
+static void  gtk_vu_meter_init (GtkVuMeter *vumeter) {
+	vumeter->vertical=TRUE;
+    	gtk_vu_meter_set_gradient(vumeter, 3, default_f_gradient_keys, 3, default_b_gradient_keys);
+        gtk_vu_meter_setup_colors(vumeter);
+}
+
+void gtk_vu_meter_set_gradient (GtkVuMeter *vumeter, gint f_gradient_key_count, GdkColor *f_gradient_keys, gint b_gradient_key_count, GdkColor *b_gradient_keys) {
+    //XXX : memdup is a bad idea ?
+    GdkColor *fgk = g_memdup(f_gradient_keys, f_gradient_key_count*sizeof(GdkColor));
+    GdkColor *bgk = g_memdup(b_gradient_keys, b_gradient_key_count*sizeof(GdkColor));
+    g_return_if_fail (fgk != NULL);
+    g_return_if_fail (bgk != NULL);
+
+    vumeter->f_gradient_keys = fgk;
+    vumeter->f_gradient_key_count=f_gradient_key_count;
+    vumeter->b_gradient_keys = bgk;
+    vumeter->b_gradient_key_count=b_gradient_key_count;	
+}
+static void gtk_vu_meter_free_colors (GtkVuMeter *vumeter) {
+	// TODO : free pixmaps	
+}
+
+static void  gtk_vu_meter_setup_colors (GtkVuMeter *vumeter) {
+
+	gint i,j;
+	guchar *f_drawbuf, *b_drawbuf, f_r, f_g, f_b, b_r, b_g, b_b;
+	gint f_key_len, b_key_len;
+	gint f_key_i, b_key_i;
+	gdouble f_key_pos, b_key_pos;
+	GdkColor *fgk, *bgk;
+
+	gint h=GTK_WIDGET(vumeter)->allocation.height;
+	gint w=GTK_WIDGET(vumeter)->allocation.width;
+
+	// Clean every previous colors and buffers
+	gtk_vu_meter_free_colors (vumeter);
+
+	if (vumeter->vertical == TRUE) {
+		vumeter->colors = MAX(h, 0);
+	} else {
+		vumeter->colors = MAX(w, 0);
+	}
+
+	// Allocate a memory buffers to hold the gradients
+	f_drawbuf=g_malloc(h*w*3);
+	b_drawbuf=g_malloc(h*w*3);
+	g_return_if_fail (f_drawbuf != NULL);
+	g_return_if_fail (b_drawbuf != NULL);
+
+	// Compute some values before looping for gradient generation
+	f_key_len = vumeter->colors / (vumeter->f_gradient_key_count-1) + 1;
+	b_key_len = vumeter->colors / (vumeter->b_gradient_key_count-1) + 1;
+	fgk=vumeter->f_gradient_keys;
+	bgk=vumeter->b_gradient_keys;
+
+	for (i=0; i<vumeter->colors; i++) {
+		// Compute the current position in the gradient keys
+		f_key_i=i/f_key_len;
+		f_key_pos=((gdouble) (i%f_key_len)/f_key_len);
+		b_key_i=i/f_key_len;
+		b_key_pos=((gdouble) (i%b_key_len)/b_key_len);
+
+		/* Generate the Colours */
+		/* foreground */
+		f_r = ( fgk[f_key_i].red*(1.0-f_key_pos) + fgk[f_key_i+1].red*f_key_pos ) / 256;
+		f_g = ( fgk[f_key_i].green*(1.0-f_key_pos) + fgk[f_key_i+1].green*f_key_pos ) / 256;
+		f_b = ( fgk[f_key_i].blue*(1.0-f_key_pos) + fgk[f_key_i+1].blue*f_key_pos ) / 256;
+		/* background */
+		b_r = ( bgk[b_key_i].red*(1.0-b_key_pos) + bgk[b_key_i+1].red*b_key_pos ) / 256;
+		b_g = ( bgk[b_key_i].green*(1.0-b_key_pos) + bgk[b_key_i+1].green*b_key_pos ) / 256;
+		b_b = ( bgk[b_key_i].blue*(1.0-b_key_pos) + bgk[b_key_i+1].blue*b_key_pos ) / 256;
+
+		/* Apply the color in the drawbufs */
+		if (vumeter->vertical == TRUE) {
+			// Vertical mode : draw directly the whole line of identical color
+			for (j=3*w*i; j<3*w*(i+1); ) {
+				f_drawbuf[j++]=f_r;
+				f_drawbuf[j++]=f_g;
+				f_drawbuf[j++]=f_b;
+			}
+			for (j=3*w*i; j<3*w*(i+1); ) {
+				b_drawbuf[j++]=b_r;
+				b_drawbuf[j++]=b_g;
+				b_drawbuf[j++]=b_b;
+			}
+		} else {
+			// Horiziontal mode : draw only the first line (color change at each pixel)
+			// Others line will be duplicated at the end
+			f_drawbuf[i]=f_r;
+			f_drawbuf[i+1]=f_g;
+			f_drawbuf[i+2]=f_b;
+			b_drawbuf[i]=b_r;
+			b_drawbuf[i+1]=b_g;
+			b_drawbuf[i+2]=b_b;
+		}
+	}
+	if (vumeter->vertical != TRUE) {
+		// Duplicate the first line over the others
+		for (j=1; j<h; j++) {
+			memcpy(f_drawbuf, f_drawbuf+3*w*j, w);
+		}
+	}
+	
+	vumeter->f_pixbuf = gdk_pixbuf_new_from_data(f_drawbuf, GDK_COLORSPACE_RGB, FALSE, 8, w, h, w*3, free_drawbuf, NULL);
+	vumeter->b_pixbuf = gdk_pixbuf_new_from_data(b_drawbuf, GDK_COLORSPACE_RGB, FALSE, 8, w, h, w*3, free_drawbuf, NULL);
+}
+
+static void gtk_vu_meter_size_request (GtkWidget *widget, GtkRequisition *requisition)
+{
+    GtkVuMeter *vumeter;
+
+    g_return_if_fail (GTK_IS_VU_METER (widget));
+    g_return_if_fail (requisition != NULL);
+
+    vumeter = GTK_VU_METER (widget);
+
+    if (vumeter->vertical == TRUE) {
+        requisition->width = VERTICAL_VUMETER_WIDTH;
+        requisition->height = MIN_VERTICAL_VUMETER_HEIGHT;
+    } else {
+        requisition->width = MIN_HORIZONTAL_VUMETER_WIDTH;
+        requisition->height = HORIZONTAL_VUMETER_HEIGHT;        
+    }
+}
+
+static void gtk_vu_meter_size_allocate (GtkWidget *widget, GtkAllocation *allocation)
+{
+    GtkVuMeter *vumeter;
+    
+    g_return_if_fail (widget != NULL);
+    g_return_if_fail (GTK_IS_VU_METER (widget));
+    g_return_if_fail (allocation != NULL);
+
+    widget->allocation = *allocation;
+    vumeter = GTK_VU_METER (widget);
+
+    if (GTK_WIDGET_REALIZED (widget)) {
+        if (vumeter->vertical == TRUE) { /* veritcal */
+            gdk_window_move_resize (widget->window, allocation->x, allocation->y,
+                VERTICAL_VUMETER_WIDTH, MAX(allocation->height, MIN_VERTICAL_VUMETER_HEIGHT));
+        } else { /* horizontal */
+            gdk_window_move_resize (widget->window, allocation->x, allocation->y,
+                MAX(allocation->width, MIN_HORIZONTAL_VUMETER_WIDTH), HORIZONTAL_VUMETER_HEIGHT);
+        }
+        /* Fix the colours */
+        gtk_vu_meter_setup_colors (vumeter);
+    }
+}
+
+static void free_drawbuf(guchar *pixels, gpointer data) {
+	g_free(pixels);
+}
+
+static gboolean gtk_vu_meter_expose (GtkWidget *vumeter, GdkEventExpose *event) {
+	//gdk_pixbuf_render_to_drawable(pixbuf, dbuf_pixmap, app->style->fg_gc[GTK_STATE_NORMAL], 0, 0, 0, 0, WIDTH, HEIGHT, GDK_RGB_DITHER_NORMAL, 0, 0);
+        cairo_t *cr;
+	gint draw_level = gtk_vu_meter_sound_level_to_draw_level(GTK_VU_METER(vumeter));
+	
+        cr = gdk_cairo_create (vumeter->window);
+
+        // set a clip region for the expose event
+        cairo_rectangle (cr,event->area.x, event->area.y, event->area.width, event->area.height);
+        cairo_clip(cr);
+
+	// Paint from the stored gradient
+	gdk_cairo_set_source_pixbuf(cr, GTK_VU_METER(vumeter)->b_pixbuf,0,0);
+	cairo_paint(cr);
+
+        // set a clip region for the expose event
+	if (GTK_VU_METER(vumeter)->vertical==TRUE) {
+	        cairo_rectangle (cr,event->area.x, event->area.y+draw_level, event->area.width, event->area.height-draw_level);
+	} else {
+		//TODO
+	        cairo_rectangle (cr,event->area.x, event->area.y, event->area.width, 12/*event->area.height*/);
+	}
+        cairo_clip(cr);
+
+	// Paint from the stored gradient
+	gdk_cairo_set_source_pixbuf(cr, GTK_VU_METER(vumeter)->f_pixbuf,0,0);
+	cairo_paint(cr);
+
+        cairo_destroy(cr);
+
+	return FALSE;
+}
+
+static gint gtk_vu_meter_sound_level_to_draw_level (GtkVuMeter *vumeter) {
+	gint draw_level;
+	gdouble level, min, max, height;
+
+	level = (gdouble)vumeter->level;
+	min = (gdouble)vumeter->min;
+	max = (gdouble)vumeter->max;
+	height = (gdouble)vumeter->colors;
+
+	draw_level = (1.0 - (level - min)/(max - min)) * height;
+
+	//printf("1.0 - (%lf - %lf)/(%lf - %lf)) * %lf => %i\n", level, min, max, min, height, draw_level);
+
+	return draw_level;
+}
+
+GtkWidget * gtk_vu_meter_new (gboolean vertical) {
+	GtkWidget *vumeter = g_object_new (GTK_TYPE_VU_METER, NULL);
+	GTK_VU_METER(vumeter)->vertical=vertical;
+	GTK_VU_METER(vumeter)->level=0;
+	GTK_VU_METER(vumeter)->min=-32767;
+	GTK_VU_METER(vumeter)->max=32767;
+
+	return vumeter;
+}
+
+
+void gtk_vu_meter_set_min_max (GtkVuMeter *vumeter, gint min, gint max)
+{
+    g_return_if_fail (vumeter != NULL);
+
+    vumeter->max = MAX(max, min);
+    vumeter->min = MIN(min, max);
+    if (vumeter->max == vumeter->min) {
+	    vumeter->max++;
+    }
+    vumeter->level = CLAMP (vumeter->level, vumeter->min, vumeter->max);
+    gtk_widget_queue_draw (GTK_WIDGET(vumeter)); 
+}
+
+void gtk_vu_meter_set_level(GtkVuMeter *vumeter, gint level)
+{
+    g_return_if_fail (vumeter != NULL);
+
+    vumeter->level = CLAMP (level, vumeter->min, vumeter->max);
+    gtk_widget_queue_draw (GTK_WIDGET(vumeter));    
+}
+
diff --git a/src/gtkvumeter.h b/src/gtkvumeter.h
new file mode 100644
index 0000000..07eb7c5
--- /dev/null
+++ b/src/gtkvumeter.h
@@ -0,0 +1,39 @@
+#ifndef GTKVUMETER_H
+#define GTKVUMETER_H
+#include <gtk/gtk.h>
+
+#define GTK_TYPE_VU_METER             (gtk_vu_meter_get_type ())
+#define GTK_VU_METER(obj)             (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_VU_METER, GtkVuMeter))
+#define GTK_VU_METER_CLASS(obj)       (G_TYPE_CHECK_CLASS_CAST ((obj), GTK_VU_METER,  GtkVuMeterClass))
+#define GTK_IS_VU_METER(obj)          (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_VU_METER))
+#define GTK_IS_VU_METER_CLASS(obj)    (G_TYPE_CHECK_CLASS_TYPE ((obj), GTK_TYPE_VU_METER))
+#define GTK_VU_METER_GET_CLASS        (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_VU_METER, GtkVuMeterClass))
+
+typedef struct _GtkVuMeter            GtkVuMeter;
+typedef struct _GtkVuMeterClass       GtkVuMeterClass;
+
+struct _GtkVuMeter {
+	GtkDrawingArea parent;
+
+	/* private */
+	gboolean vertical;
+	gint level, min, max;
+
+	gint f_gradient_key_count, b_gradient_key_count;
+	GdkColor *f_gradient_keys, *b_gradient_keys;
+
+	gint colors;
+	GdkPixbuf *f_pixbuf, *b_pixbuf;
+};
+
+struct _GtkVuMeterClass {
+	GtkDrawingAreaClass parent_class;
+};
+
+GtkType    gtk_vu_meter_get_type (void) G_GNUC_CONST;
+GtkWidget * gtk_vu_meter_new (gboolean vertical);
+void gtk_vu_meter_set_gradient (GtkVuMeter *vumeter, gint f_gradient_key_count, GdkColor *f_gradient_keys, gint b_gradient_key_count, GdkColor *b_gradient_keys);
+void gtk_vu_meter_set_min_max (GtkVuMeter *vumeter, gint min, gint max);
+void gtk_vu_meter_set_level(GtkVuMeter *vumeter, gint level);
+
+#endif /*GTKVUMETER_H*/
diff --git a/src/hsv2rgb.c b/src/hsv2rgb.c
new file mode 100644
index 0000000..9f445e9
--- /dev/null
+++ b/src/hsv2rgb.c
@@ -0,0 +1,59 @@
+/* hsv2rgb.c
+ * Convert Hue Saturation Value to Red Green Blue
+ *
+ * P.J. 08-Aug-98
+ *
+ * Reference:
+ * D. F. Rogers
+ * Procedural Elements for Computer Graphics
+ * McGraw Hill 1985
+ */
+
+#include "hsv2rgb.h"
+ 
+int hsv2rgb( struct hsv_colour *hsv, struct rgb_colour *rgb ) {
+   /*
+    * Purpose:
+    * Convert HSV values to RGB values
+    * All values are in the range [0.0 .. 1.0]
+    */
+   float S, H, V, F, M, N, K;
+   int   I;
+   
+   S = hsv->s;  /* Saturation */
+   H = hsv->h;  /* Hue */
+   V = hsv->v;  /* value or brightness */
+   
+   if ( S == 0.0 ) {
+      /* 
+       * Achromatic case, set level of grey 
+       */
+      rgb->r = V;
+      rgb->g = V;
+      rgb->b = V;
+   } else {
+      /* 
+       * Determine levels of primary colours. 
+       */
+      if (H >= 1.0) {
+         H = 0.0;
+      } else {
+         H = H * 6;
+      } /* end if */
+      I = (int) H;   /* should be in the range 0..5 */
+      F = H - I;     /* fractional part */
+
+      M = V * (1 - S);
+      N = V * (1 - S * F);
+      K = V * (1 - S * (1 - F));
+
+      if (I == 0) { rgb->r = V; rgb->g = K; rgb->b = M; }
+      if (I == 1) { rgb->r = N; rgb->g = V; rgb->b = M; }
+      if (I == 2) { rgb->r = M; rgb->g = V; rgb->b = K; }
+      if (I == 3) { rgb->r = M; rgb->g = N; rgb->b = V; }
+      if (I == 4) { rgb->r = K; rgb->g = M; rgb->b = V; }
+      if (I == 5) { rgb->r = V; rgb->g = M; rgb->b = N; }
+   } /* end if */
+
+   return 0;
+} /* end function hsv2rgb */
diff --git a/src/hsv2rgb.h b/src/hsv2rgb.h
new file mode 100644
index 0000000..bd880ff
--- /dev/null
+++ b/src/hsv2rgb.h
@@ -0,0 +1,18 @@
+#ifndef HSV2RGB_H
+#define HSV2RGB_H
+
+struct hsv_colour {
+   float h;
+   float s;
+   float v;
+}; /* end struct */
+
+struct rgb_colour {
+   float r;
+   float g;
+   float b;
+}; /* end struct */
+
+int hsv2rgb( struct hsv_colour *hsv, struct rgb_colour *rgb );
+
+#endif /* HSV2RGB_H */
diff --git a/src/music2light.c b/src/music2light.c
new file mode 100644
index 0000000..fd58d03
--- /dev/null
+++ b/src/music2light.c
@@ -0,0 +1,80 @@
+#include <gtk/gtk.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include "gtkvumeter.h"
+#include "win_main.h"
+#include "compute.h"
+#include "capture.h"
+#include "hsv2rgb.h"
+
+gint *audio_vumeter_val, *light_h, *light_s, *light_v, *light_r, *light_g, *light_b; 
+void my_process(float *data, size_t nsamples, size_t nchan);
+
+int main (int argc, char **argv) {
+	GtkWidget *mainwin;
+	gint vals_for_vumeters[7]={0,0,0,0,0,0,0}; //sound,h,s,v,r,g,b
+	//Some handy references to the previous array items to make things clear whenever possible
+	audio_vumeter_val=vals_for_vumeters+0;
+	light_h=vals_for_vumeters+1;
+	light_s=vals_for_vumeters+2;
+	light_v=vals_for_vumeters+3;
+	light_r=vals_for_vumeters+4;
+	light_g=vals_for_vumeters+5;
+	light_b=vals_for_vumeters+6;
+
+	pthread_t audio_analyzer;
+
+	g_thread_init(NULL);
+	gdk_threads_init();
+	gdk_threads_enter();
+	gtk_init (&argc, &argv);
+
+	mainwin=win_main_build();
+	gtk_widget_show_all (mainwin);
+
+	printf("debug : main my_process==%p\n", my_process);
+	printf("debug : main (void *)my_process==%p\n", (void *)my_process);
+	pthread_create (&audio_analyzer, (void *)NULL, (void *)audio_thread, (void *)my_process);
+	g_timeout_add (25, win_main_update_vumeters, (gpointer)vals_for_vumeters);
+
+	gtk_main ();
+	gdk_threads_leave();
+
+	return 0;
+}
+
+void my_process(float *data, size_t nsamples, size_t nchan) {
+
+	float sound_level;
+	struct hsv_colour hsv;
+	struct rgb_colour rgb;
+
+	//FIXME : rate should came from PulseAudio
+	sound_level=compute_level(data, nsamples, 44100);
+
+//	printf("sound_level==%f\n", sound_level);
+
+	// Update sound vumeter value (refreshed asynchronously)
+	*audio_vumeter_val=(int)sound_level;
+
+	// Transfert Function
+	audio2hsv_1(sound_level,&(hsv.h),&(hsv.s),&(hsv.v));
+	
+	// Conversion
+	hsv2rgb(&hsv, &rgb);
+//	printf("hsv %+.3f %+.3f %+.3f\n", hsv.h, hsv.s, hsv.v);
+//	printf("rgb %+.3f %+.3f %+.3f\n", rgb.r, rgb.g, rgb.b);
+
+	//Update vu-meters
+	*light_h=hsv.h*255;
+	*light_s=hsv.s*255;
+	*light_v=hsv.v*255;
+
+	*light_r=rgb.r*255;
+	*light_g=rgb.g*255;
+	*light_b=rgb.b*255;
+	
+	// Send to DMX
+	//TODO
+}
+
diff --git a/src/win_main.c b/src/win_main.c
new file mode 100644
index 0000000..daa0a34
--- /dev/null
+++ b/src/win_main.c
@@ -0,0 +1,73 @@
+#include "win_main.h"
+#include "gtkvumeter.h"
+
+GtkWidget *vumeter_sound, *vumeter_r, *vumeter_g, *vumeter_b, *vumeter_h, *vumeter_s, *vumeter_v;
+
+GtkWidget *win_main_build() {
+	GtkWidget *win, *hbox1;
+
+	GdkColor f_gradient_red[2] = {{0,65535,0,0},{0,0,0,0}};
+	GdkColor b_gradient_red[2] = {{0,49151,0,0},{0,0,0,0}};
+	GdkColor f_gradient_green[2] = {{0,0,65535,0},{0,0,0,0}};
+	GdkColor b_gradient_green[2] = {{0,0,49151,0},{0,0,0,0}};
+	GdkColor f_gradient_blue[2] = {{0,0,0,65535},{0,0,0,0}};
+	GdkColor b_gradient_blue[2] = {{0,0,0,49151},{0,0,0,0}};
+	GdkColor f_gradient_hue[7] = {{0,65535,0,0},{0,65535,0,65535},{0,0,0,65535},{0,0,65535,65535},{0,0,65535,0},{0,65535,65535,0},{0,65535,0,0}};
+	GdkColor b_gradient_hue[7] = {{0,49151,0,0},{0,49151,0,49151},{0,0,0,49151},{0,0,49151,49151},{0,0,49151,0},{0,49151,49151,0},{0,49151,0,0}};
+
+	win = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+
+	hbox1 = gtk_hbox_new(FALSE, 0);
+	gtk_container_add(GTK_CONTAINER(win), hbox1);
+	gtk_container_set_border_width(GTK_CONTAINER(hbox1), 5);
+
+//TODO : gtk_vumeter_set_min_max (GTK_VU_METER(vumeter), min, max);
+	vumeter_sound = gtk_vu_meter_new (TRUE);
+	gtk_vu_meter_set_min_max(GTK_VU_METER(vumeter_sound), -50, 0);
+	gtk_box_pack_start(GTK_BOX(hbox1), vumeter_sound, FALSE, FALSE, 0);
+
+	vumeter_h = gtk_vu_meter_new (TRUE);
+	gtk_vu_meter_set_min_max(GTK_VU_METER(vumeter_h), 0, 255);
+	gtk_vu_meter_set_gradient(GTK_VU_METER(vumeter_h), 7, f_gradient_hue, 7, b_gradient_hue);
+	gtk_box_pack_start(GTK_BOX(hbox1), vumeter_h, FALSE, FALSE, 0);
+
+	vumeter_s = gtk_vu_meter_new (TRUE);
+	gtk_vu_meter_set_min_max(GTK_VU_METER(vumeter_s), 0, 255);
+	gtk_vu_meter_set_gradient(GTK_VU_METER(vumeter_s), 2, f_gradient_red, 2, b_gradient_red);
+	gtk_box_pack_start(GTK_BOX(hbox1), vumeter_s, FALSE, FALSE, 0);
+
+	vumeter_v = gtk_vu_meter_new (TRUE);
+	gtk_vu_meter_set_min_max(GTK_VU_METER(vumeter_v), 0, 255);
+	gtk_vu_meter_set_gradient(GTK_VU_METER(vumeter_v), 2, f_gradient_red, 2, b_gradient_red);
+	gtk_box_pack_start(GTK_BOX(hbox1), vumeter_v, FALSE, FALSE, 0);
+
+
+	vumeter_r = gtk_vu_meter_new (TRUE);
+	gtk_vu_meter_set_min_max(GTK_VU_METER(vumeter_r), 0, 255);
+	gtk_vu_meter_set_gradient(GTK_VU_METER(vumeter_r), 2, f_gradient_red, 2, b_gradient_red);
+	gtk_box_pack_start(GTK_BOX(hbox1), vumeter_r, FALSE, FALSE, 0);
+
+	vumeter_g = gtk_vu_meter_new (TRUE);
+	gtk_vu_meter_set_min_max(GTK_VU_METER(vumeter_g), 0, 255);
+	gtk_vu_meter_set_gradient(GTK_VU_METER(vumeter_g), 2, f_gradient_green, 2, b_gradient_green);
+	gtk_box_pack_start(GTK_BOX(hbox1), vumeter_g, FALSE, FALSE, 0);
+
+	vumeter_b = gtk_vu_meter_new (TRUE);
+	gtk_vu_meter_set_min_max(GTK_VU_METER(vumeter_b), 0, 255);
+	gtk_vu_meter_set_gradient(GTK_VU_METER(vumeter_b), 2, f_gradient_blue, 2, b_gradient_blue);
+	gtk_box_pack_start(GTK_BOX(hbox1), vumeter_b, FALSE, FALSE, 0);
+
+	return win;
+}
+
+gboolean win_main_update_vumeters(gpointer vals) {
+	gtk_vu_meter_set_level(GTK_VU_METER(vumeter_sound), ((gint*)vals)[0]);
+	gtk_vu_meter_set_level(GTK_VU_METER(vumeter_h), ((gint*)vals)[1]);
+	gtk_vu_meter_set_level(GTK_VU_METER(vumeter_s), ((gint*)vals)[2]);
+	gtk_vu_meter_set_level(GTK_VU_METER(vumeter_v), ((gint*)vals)[3]);
+	gtk_vu_meter_set_level(GTK_VU_METER(vumeter_r), ((gint*)vals)[4]);
+	gtk_vu_meter_set_level(GTK_VU_METER(vumeter_g), ((gint*)vals)[5]);
+	gtk_vu_meter_set_level(GTK_VU_METER(vumeter_b), ((gint*)vals)[6]);
+	return TRUE;
+}
+
diff --git a/src/win_main.h b/src/win_main.h
new file mode 100644
index 0000000..5068c89
--- /dev/null
+++ b/src/win_main.h
@@ -0,0 +1,9 @@
+#ifndef WIN_MAIN_H
+#define WIN_MAIN_H
+#include <gtk/gtk.h>
+
+GtkWidget *win_main_build();
+gboolean win_main_update_vumeters(gpointer vals);
+
+#endif
+