diff options
| -rw-r--r-- | tests/test5/LICENSE.txt | 342 | ||||
| -rw-r--r-- | tests/test5/TOREAD | 3 | ||||
| -rw-r--r-- | tests/test5/compute.c | 91 | ||||
| -rw-r--r-- | tests/test5/compute.h | 4 | ||||
| -rw-r--r-- | tests/test5/fft.c | 80 | ||||
| -rw-r--r-- | tests/test5/fft.h | 9 | ||||
| -rw-r--r-- | tests/test5/test5.c | 2 | ||||
| -rw-r--r-- | tests/test6/test6.c | 13 |
8 files changed, 454 insertions, 90 deletions
diff --git a/tests/test5/LICENSE.txt b/tests/test5/LICENSE.txt new file mode 100644 index 0000000..ec091c1 --- /dev/null +++ b/tests/test5/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. 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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 +when it starts in an interactive mode: + + 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 +necessary. Here is a sample; alter the names: + + 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/tests/test5/TOREAD b/tests/test5/TOREAD index acb1aca..b1abccf 100644 --- a/tests/test5/TOREAD +++ b/tests/test5/TOREAD @@ -2,3 +2,6 @@ http://freedesktop.org/software/pulseaudio/doxygen/async.html#overv_sec http://www.developpez.net/forums/d467150/autres-langages/algorithmes/fft-role/ +http://code.google.com/p/jivemodular/source/browse/trunk/apps/jive/src/model/plugins/meters/AudioSpecMeterEditor.cpp?r=67 +http://en.wikipedia.org/wiki/Frequency_weighting + diff --git a/tests/test5/compute.c b/tests/test5/compute.c index 3a94efe..e8b03fc 100644 --- a/tests/test5/compute.c +++ b/tests/test5/compute.c @@ -4,6 +4,9 @@ #include <math.h> #define MAX_SAMPLES 2048 +static inline float todB_a(const float *x); +void compute_spectrum(float * data, int width, double rate, float *output); + gfloat compute_level(const float *data, size_t nsamples, size_t nchan) { @@ -32,22 +35,26 @@ gfloat compute_level(const float *data, size_t nsamples, size_t nchan) { } // printf("\n"); - compute_spectrom(input, nsamples, rate, output); + compute_spectrum(input, nsamples, rate, output); + //printf("%f\n", output[0]); level=0.f; for (i=1;i<128;i++) { level+=output[i]; } level/=127.f; - //printf("%f\n", level); return level; } -// From Audacity -void compute_spectrom(float * data, int width, double rate, float *output) { +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, double rate, float *output) { int i; float processed[256]={0.0f}; -//TODO : remove init here +//TODO : remove init here(handy for step by step debug) float in[256]={0.0f}; float out[256]={0.0f}; @@ -57,7 +64,7 @@ void compute_spectrom(float * data, int width, double rate, float *output) { for (i=0; i<256; i++) in[i] = data[start + i]; - // Hanning + // Windowing : Hanning for (i=0; i<256; i++) in[i] *= 0.50 - 0.50 * cos(2 * M_PI * i / (256 - 1)); @@ -83,78 +90,6 @@ void compute_spectrom(float * data, int width, double rate, float *output) { output[i] = processed[i]; } -/* - * 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, float *Out) -{ - int i; - - float theta = M_PI / 128; - - float tmpReal[128]; - float tmpImag[128]; - float RealOut[128]; - float ImagOut[128]; - - for (i = 0; i < 128; i++) { - tmpReal[i] = In[2 * i]; - tmpImag[i] = In[2 * i + 1]; //FIXME : WTFFFF ? - tmpImag[i]=0; - } - - FFT(128, 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 < 128 / 2; i++) { - - i3 = 128 - 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[128 / 2]; - it = ImagOut[128 / 2]; - Out[128 / 2] = rt * rt + it * it; -} - void audio2hsv_1(gint audio_level, gint *light_h, gint *light_s, gint *light_v) { // Dummy code *light_h=-audio_level; diff --git a/tests/test5/compute.h b/tests/test5/compute.h index 24d57e9..63f9dac 100644 --- a/tests/test5/compute.h +++ b/tests/test5/compute.h @@ -4,10 +4,6 @@ #include <gtk/gtk.h> gfloat compute_level(const float *data, size_t nsamples, size_t nchan); - -void compute_spectrom(float * data, int width, double rate, float *output); -void PowerSpectrum(float *In, float *Out); - void audio2hsv_1(gint audio_level, gint *light_h, gint *light_s, gint *light_v); void hsv2rgb(gint h, gint s, gint v, gint *r, gint *g, gint *b); diff --git a/tests/test5/fft.c b/tests/test5/fft.c index 902d7f0..a9957a7 100644 --- a/tests/test5/fft.c +++ b/tests/test5/fft.c @@ -2,12 +2,18 @@ #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 = NULL; void FFT(int NumSamples, - gboolean InverseTransform, + int InverseTransform, float *RealIn, float *ImagIn, float *RealOut, float *ImagOut) { int NumBits; /* Number of bits needed to store indices */ @@ -151,3 +157,75 @@ int ReverseBits(int index, int NumBits) } +/* + * 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, float *Out) +{ + int i; + + float theta = M_PI / 128; + + float tmpReal[128]; + float tmpImag[128]; + float RealOut[128]; + float ImagOut[128]; + + for (i = 0; i < 128; i++) { + tmpReal[i] = In[2 * i]; + tmpImag[i] = In[2 * i + 1]; //FIXME : WTFFFF ? + tmpImag[i]=0; + } + + FFT(128, 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 < 128 / 2; i++) { + + i3 = 128 - 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[128 / 2]; + it = ImagOut[128 / 2]; + Out[128 / 2] = rt * rt + it * it; +} + diff --git a/tests/test5/fft.h b/tests/test5/fft.h index 7f2f0de..02bb7de 100644 --- a/tests/test5/fft.h +++ b/tests/test5/fft.h @@ -1,14 +1,19 @@ #ifndef FFT_H #define FFT_H -#include <gtk/gtk.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) +*/ -void FFT(int NumSamples, gboolean InverseTransform, +void FFT(int NumSamples, int InverseTransform, float *RealIn, float *ImagIn, float *RealOut, float *ImagOut); void InitFFT(); int NumberOfBitsNeeded(int PowerOfTwo); inline int FastReverseBits(int i, int NumBits); int ReverseBits(int index, int NumBits); +void PowerSpectrum(float *In, float *Out); #endif diff --git a/tests/test5/test5.c b/tests/test5/test5.c index 9eadb65..7bf6a88 100644 --- a/tests/test5/test5.c +++ b/tests/test5/test5.c @@ -49,7 +49,7 @@ void my_process(float *data, size_t nsamples, size_t nchan) { sound_level=compute_level(data, nsamples, nchan); // Update sound vumeter value (refreshed asynchronously) - *audio_vumeter_val=((int)sound_level*10.f); + *audio_vumeter_val=(int)(sound_level*10.f); // Transfert Function audio2hsv_1(*audio_vumeter_val,light_h,light_s,light_v); diff --git a/tests/test6/test6.c b/tests/test6/test6.c index fc99598..3a78c0c 100644 --- a/tests/test6/test6.c +++ b/tests/test6/test6.c @@ -26,10 +26,15 @@ static inline float todB_a2(const float *x){ //#endif int main() { - float f; - - for(f=1.f;f<100000000.f;f*=1.2f) - printf("%f\t%f\n", todB_a(&f), todB_a2(&f)); + float f, dbav[32]={0.f}, dbaf[32]={0.f}; + int i=0; + for(f=1024000.f;f>1.f;f/=2.f) { + dbaf[31-i]=f; + dbav[31-i]=todB_a(&f); + i++; + } + for (i=0;i<32;i++) + printf("f==%f\tv==%f\n", dbaf[i], dbav[i]); return 0; } |