diff options
| author | Yann Herklotz <ymherklotz@gmail.com> | 2018-03-18 20:46:13 +0000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-03-18 20:46:13 +0000 |
| commit | f860d0c5bb890b4e73c2d2dc76bbb0d4258e0007 (patch) | |
| tree | 4177cf0c50d898856dd106ed88ab6f9fd01d3502 | |
| parent | 8cdda67f13ccf90e60033a630dcd8f5b4079d7b9 (diff) | |
| parent | 8cafd3deee9e424857c361362352f563367489eb (diff) | |
| download | NoiseSilencer-f860d0c5bb890b4e73c2d2dc76bbb0d4258e0007.tar.gz NoiseSilencer-f860d0c5bb890b4e73c2d2dc76bbb0d4258e0007.zip | |
Merge pull request #2 from dan12n/project
Merging working project into master
32 files changed, 493 insertions, 211 deletions
diff --git a/Project/RTDSP/.launches/RTDSP.launch b/Project/RTDSP/.launches/RTDSP.launch index 4e69bfc..8830bf8 100644 --- a/Project/RTDSP/.launches/RTDSP.launch +++ b/Project/RTDSP/.launches/RTDSP.launch @@ -1,8 +1,8 @@ <?xml version="1.0" encoding="UTF-8"?> <launchConfiguration type="com.ti.ccstudio.debug.core.CCELaunchType"> <stringAttribute key="org.eclipse.debug.core.source_locator_memento" value="<?xml version="1.0" encoding="UTF-8"?> <sourceLookupDirector> <sourceContainers duplicates="false"> <container memento="&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;&#13;&#10;&lt;default/&gt;&#13;&#10;" typeId="org.eclipse.debug.core.containerType.default"/> </sourceContainers> </sourceLookupDirector> "/> -<booleanAttribute key="com.ti.ccstudio.debug.core.MRU_PROGRAM_S_ONLY" value="false"/> <booleanAttribute key="org.eclipse.debug.ui.ATTR_LAUNCH_IN_BACKGROUND" value="false"/> +<booleanAttribute key="com.ti.ccstudio.debug.core.MRU_PROGRAM_S_ONLY" value="false"/> <stringAttribute key="org.eclipse.cdt.launch.DEBUGGER_ID" value="com.ti.ccstudio.debug.core.CCEDebugger"/> <stringAttribute key="CCEDebugOptions.CPU_RESOLVE_OPTION" value="exact"/> <stringAttribute key="org.eclipse.debug.ui.DISPLAY_NAME" value="RTDSP [Debug] - Spectrum Digital DSK-EVM-eZdsp onboard USB Emulator_0/TMS320C671X"/> @@ -12,8 +12,8 @@ <stringAttribute key="com.ti.ccstudio.debug.core.DISPLAY_NAME_FORMAT" value="RTDSP [Debug] - {0}"/> <stringAttribute key="CCEDebugOptions.TARGET_CONFIGURATION_OPTION" value="full"/> <stringAttribute key="org.eclipse.cdt.launch.MEMORY_BLOCKS" value="<?xml version="1.0" encoding="UTF-8"?> <memoryBlockExpressionList/> "/> -<stringAttribute key="com.ti.ccstudio.debug.core.MRU_PROGRAM_NAME" value="C:\github\RTDSP\Project\RTDSP\Debug\RTDSP.out"/> -<stringAttribute key="com.ti.ccstudio.debug.core.MRU_MODULES" value="<?xml version="1.0" encoding="UTF-8"?> <modules> <module name="C:\GIT\RTDSP\lab3\RTDSP\Debug\RTDSP.out" time="Fri Jan 19 14:07:28 GMT 2018" time_long="1516370848357"/> <module name="C:\Github\RTDSP\lab3\RTDSP\Debug\RTDSP.out" time="Tue Jan 23 11:15:11 GMT 2018" time_long="1516706111426"/> <module name="C:\GIT\RTDSP\lab4\RTDSP\Debug\RTDSP.out" time="Thu Feb 01 11:44:21 GMT 2018" time_long="1517485461898"/> <module name="C:\github\RTDSP\lab4\RTDSP\Debug\RTDSP.out" time="Thu Feb 15 13:55:55 GMT 2018" time_long="1518702955359"/> <module name="C:\Github\RTDSP\lab5\RTDSP\Debug\RTDSP.out" time="Tue Feb 27 12:18:55 GMT 2018" time_long="1519733935329"/> <module name="C:\github\RTDSP\lab5\RTDSP\Debug\RTDSP.out" time="Thu Mar 01 13:36:20 GMT 2018" time_long="1519911380476"/> <module name="C:\github\RTDSP\Project\RTDSP\Debug\RTDSP.out" time="Mon Mar 05 10:28:49 GMT 2018" time_long="1520245729915"/> </modules> "/> +<stringAttribute key="com.ti.ccstudio.debug.core.MRU_PROGRAM_NAME" value="C:\GIT\RTDSP\Project\RTDSP\Debug\RTDSP.out"/> +<stringAttribute key="com.ti.ccstudio.debug.core.MRU_MODULES" value="<?xml version="1.0" encoding="UTF-8"?> <modules> <module name="C:\GIT\RTDSP\lab3\RTDSP\Debug\RTDSP.out" time="Fri Jan 19 14:07:28 GMT 2018" time_long="1516370848357"/> <module name="C:\Github\RTDSP\lab3\RTDSP\Debug\RTDSP.out" time="Tue Jan 23 11:15:11 GMT 2018" time_long="1516706111426"/> <module name="C:\GIT\RTDSP\lab4\RTDSP\Debug\RTDSP.out" time="Thu Feb 01 11:44:21 GMT 2018" time_long="1517485461898"/> <module name="C:\github\RTDSP\lab4\RTDSP\Debug\RTDSP.out" time="Thu Feb 15 13:55:55 GMT 2018" time_long="1518702955359"/> <module name="C:\Github\RTDSP\lab5\RTDSP\Debug\RTDSP.out" time="Tue Feb 27 12:18:55 GMT 2018" time_long="1519733935329"/> <module name="C:\github\RTDSP\lab5\RTDSP\Debug\RTDSP.out" time="Thu Mar 01 13:36:20 GMT 2018" time_long="1519911380476"/> <module name="C:\github\RTDSP\Project\RTDSP\Debug\RTDSP.out" time="Thu Mar 08 15:31:06 GMT 2018" time_long="1520523066763"/> <module name="C:\GIT\RTDSP\Project\RTDSP\Debug\RTDSP.out" time="Thu Mar 15 16:05:05 GMT 2018" time_long="1521129905593"/> </modules> "/> <stringAttribute key="CCEDebugOptions.CPU_NAME" value="Spectrum Digital DSK-EVM-eZdsp onboard USB Emulator_0/TMS320C671X"/> <stringAttribute key="org.eclipse.cdt.launch.PROJECT_ATTR" value="RTDSP"/> <stringAttribute key="org.eclipse.cdt.launch.GLOBAL_VARIABLES" value="<?xml version="1.0" encoding="UTF-8"?> <globalVariableList/> "/> @@ -21,6 +21,6 @@ <stringAttribute key="org.eclipse.cdt.launch.PROGRAM_NAME" value="Debug/RTDSP.out"/> <stringAttribute key="CCEDebugOptions.CPU_ISA" value="TMS320C671X"/> <stringAttribute key="com.ti.ccstudio.debug.core.BUILD_CONFIGURATION" value="Debug"/> -<stringAttribute key="CCEDebugOptions.TARGET_CONFIGURATION_FILE" value="C:\github\RTDSP\Project\RTDSP\NewTargetConfiguration.ccxml"/> +<stringAttribute key="CCEDebugOptions.TARGET_CONFIGURATION_FILE" value="C:\GIT\RTDSP\Project\RTDSP\NewTargetConfiguration.ccxml"/> <stringAttribute key="org.eclipse.debug.core.source_locator_id" value="com.ti.ccstudio.debug.core.sourceLocator"/> </launchConfiguration> diff --git a/Project/RTDSP/Images/car.jpg b/Project/RTDSP/Images/car.jpg Binary files differnew file mode 100644 index 0000000..a07535d --- /dev/null +++ b/Project/RTDSP/Images/car.jpg diff --git a/Project/RTDSP/Images/car_best_case.jpg b/Project/RTDSP/Images/car_best_case.jpg Binary files differnew file mode 100644 index 0000000..2b6ccb3 --- /dev/null +++ b/Project/RTDSP/Images/car_best_case.jpg diff --git a/Project/RTDSP/Images/clean_spec.jpg b/Project/RTDSP/Images/clean_spec.jpg Binary files differnew file mode 100644 index 0000000..feb54db --- /dev/null +++ b/Project/RTDSP/Images/clean_spec.jpg diff --git a/Project/RTDSP/Images/intermediate.PNG b/Project/RTDSP/Images/intermediate.PNG Binary files differnew file mode 100644 index 0000000..67610eb --- /dev/null +++ b/Project/RTDSP/Images/intermediate.PNG diff --git a/Project/RTDSP/Images/mag.PNG b/Project/RTDSP/Images/mag.PNG Binary files differnew file mode 100644 index 0000000..36e8d28 --- /dev/null +++ b/Project/RTDSP/Images/mag.PNG diff --git a/Project/RTDSP/Matlab/create_spectrogram.m b/Project/RTDSP/Matlab/create_spectrogram.m new file mode 100644 index 0000000..5bf2661 --- /dev/null +++ b/Project/RTDSP/Matlab/create_spectrogram.m @@ -0,0 +1,19 @@ +%% +% Creates the spectrogram for the audio files + +[song, fs] = audioread('../audio/best_case/car.wav'); +song = song(1:fs*10); +figure +spectrogram(song, 256, [], [], fs, 'yaxis'); + +%% +[song, fs] = audioread('../audio/original/car1.wav'); +song = song(1:fs*10); +figure +spectrogram(song, 256, [], [], fs, 'yaxis'); + +%% +[song, fs] = audioread('../audio/original/clean.wav'); +song = song(1:fs*10); +figure +spectrogram(song, 256, [], [], fs, 'yaxis'); diff --git a/Project/RTDSP/audio/best_case/car.wav b/Project/RTDSP/audio/best_case/car.wav Binary files differnew file mode 100644 index 0000000..7b3a194 --- /dev/null +++ b/Project/RTDSP/audio/best_case/car.wav diff --git a/Project/RTDSP/audio/best_case/car.wma b/Project/RTDSP/audio/best_case/car.wma Binary files differnew file mode 100644 index 0000000..30c3302 --- /dev/null +++ b/Project/RTDSP/audio/best_case/car.wma diff --git a/Project/RTDSP/audio/best_case/lynx2.wav b/Project/RTDSP/audio/best_case/lynx2.wav Binary files differnew file mode 100644 index 0000000..3cb2341 --- /dev/null +++ b/Project/RTDSP/audio/best_case/lynx2.wav diff --git a/Project/RTDSP/audio/best_case/lynx2.wma b/Project/RTDSP/audio/best_case/lynx2.wma Binary files differnew file mode 100644 index 0000000..1966d2d --- /dev/null +++ b/Project/RTDSP/audio/best_case/lynx2.wma diff --git a/Project/RTDSP/audio/best_case/phantom2.wav b/Project/RTDSP/audio/best_case/phantom2.wav Binary files differnew file mode 100644 index 0000000..048155c --- /dev/null +++ b/Project/RTDSP/audio/best_case/phantom2.wav diff --git a/Project/RTDSP/audio/best_case/phantom2.wma b/Project/RTDSP/audio/best_case/phantom2.wma Binary files differnew file mode 100644 index 0000000..733c5e2 --- /dev/null +++ b/Project/RTDSP/audio/best_case/phantom2.wma diff --git a/Project/RTDSP/audio/best_case/phantom4.wav b/Project/RTDSP/audio/best_case/phantom4.wav Binary files differnew file mode 100644 index 0000000..ab52539 --- /dev/null +++ b/Project/RTDSP/audio/best_case/phantom4.wav diff --git a/Project/RTDSP/audio/best_case/phantom4.wma b/Project/RTDSP/audio/best_case/phantom4.wma Binary files differnew file mode 100644 index 0000000..5a7aa75 --- /dev/null +++ b/Project/RTDSP/audio/best_case/phantom4.wma diff --git a/Project/RTDSP/audio/original/car1.wav b/Project/RTDSP/audio/original/car1.wav Binary files differnew file mode 100644 index 0000000..4d64c03 --- /dev/null +++ b/Project/RTDSP/audio/original/car1.wav diff --git a/Project/RTDSP/audio/original/clean.wav b/Project/RTDSP/audio/original/clean.wav Binary files differnew file mode 100644 index 0000000..0a76159 --- /dev/null +++ b/Project/RTDSP/audio/original/clean.wav diff --git a/Project/RTDSP/audio/original/factory1.wav b/Project/RTDSP/audio/original/factory1.wav Binary files differnew file mode 100644 index 0000000..6486e33 --- /dev/null +++ b/Project/RTDSP/audio/original/factory1.wav diff --git a/Project/RTDSP/audio/original/factory2.wav b/Project/RTDSP/audio/original/factory2.wav Binary files differnew file mode 100644 index 0000000..e563084 --- /dev/null +++ b/Project/RTDSP/audio/original/factory2.wav diff --git a/Project/RTDSP/audio/original/lynx1.wav b/Project/RTDSP/audio/original/lynx1.wav Binary files differnew file mode 100644 index 0000000..cb59ce9 --- /dev/null +++ b/Project/RTDSP/audio/original/lynx1.wav diff --git a/Project/RTDSP/audio/original/lynx2.wav b/Project/RTDSP/audio/original/lynx2.wav Binary files differnew file mode 100644 index 0000000..e25915b --- /dev/null +++ b/Project/RTDSP/audio/original/lynx2.wav diff --git a/Project/RTDSP/audio/original/phantom1.wav b/Project/RTDSP/audio/original/phantom1.wav Binary files differnew file mode 100644 index 0000000..4a0637e --- /dev/null +++ b/Project/RTDSP/audio/original/phantom1.wav diff --git a/Project/RTDSP/audio/original/phantom2.wav b/Project/RTDSP/audio/original/phantom2.wav Binary files differnew file mode 100644 index 0000000..5ebf511 --- /dev/null +++ b/Project/RTDSP/audio/original/phantom2.wav diff --git a/Project/RTDSP/audio/original/phantom4.wav b/Project/RTDSP/audio/original/phantom4.wav Binary files differnew file mode 100644 index 0000000..893615b --- /dev/null +++ b/Project/RTDSP/audio/original/phantom4.wav diff --git a/Project/RTDSP/audio/original/signals.txt b/Project/RTDSP/audio/original/signals.txt new file mode 100644 index 0000000..fc1f488 --- /dev/null +++ b/Project/RTDSP/audio/original/signals.txt @@ -0,0 +1,17 @@ +Speech files for testing noise cancellation + +clean.wav A 40-second passage concerning sailors. All other files + have noise added to this passage. The final digit of the + file names indicates the noise amplitude. + +car1.wav Car noise + +factory1.wav Factory Noise at two sound levels +factory2.wav + +lynx1.wav A lynx helicopter +lynx2.wav + +phantom1.wav An F15 fighter aircraft +phantom2.wav +phantom4.wav diff --git a/Project/RTDSP/audio/without_optimisations/car.wma b/Project/RTDSP/audio/without_optimisations/car.wma Binary files differnew file mode 100644 index 0000000..9412a9a --- /dev/null +++ b/Project/RTDSP/audio/without_optimisations/car.wma diff --git a/Project/RTDSP/audio/without_optimisations/factory2.wma b/Project/RTDSP/audio/without_optimisations/factory2.wma Binary files differnew file mode 100644 index 0000000..ddfa200 --- /dev/null +++ b/Project/RTDSP/audio/without_optimisations/factory2.wma diff --git a/Project/RTDSP/audio/without_optimisations/lynx2.wma b/Project/RTDSP/audio/without_optimisations/lynx2.wma Binary files differnew file mode 100644 index 0000000..9d8bf0e --- /dev/null +++ b/Project/RTDSP/audio/without_optimisations/lynx2.wma diff --git a/Project/RTDSP/audio/without_optimisations/phantom4.wma b/Project/RTDSP/audio/without_optimisations/phantom4.wma Binary files differnew file mode 100644 index 0000000..5e22805 --- /dev/null +++ b/Project/RTDSP/audio/without_optimisations/phantom4.wma diff --git a/Project/RTDSP/enhance.c b/Project/RTDSP/enhance.c new file mode 100644 index 0000000..09b78d6 --- /dev/null +++ b/Project/RTDSP/enhance.c @@ -0,0 +1,389 @@ +/************************************************************************************* + DEPARTMENT OF ELECTRICAL AND ELECTRONIC ENGINEERING + IMPERIAL COLLEGE LONDON + + EE 3.19: Real Time Digital Signal Processing + Dr Paul Mitcheson and Daniel Harvey + + PROJECT: Frame Processing + + ********* ENHANCE. C ********** + Shell for speech enhancement + + Demonstrates overlap-add frame processing (interrupt driven) on the DSK. + + ************************************************************************************* + By Danny Harvey: 21 July 2006 + Updated for use on CCS v4 Sept 2010 + ************************************************************************************/ +/* + * You should modify the code so that a speech enhancement project is built + * on top of this template. + */ +/**************************** Pre-processor statements ******************************/ +// library required when using calloc +#include <stdlib.h> +// Included so program can make use of DSP/BIOS configuration tool. +#include "dsp_bios_cfg.h" + +/* The file dsk6713.h must be included in every program that uses the BSL. This + example also includes dsk6713_aic23.h because it uses the + AIC23 codec module (audio interface). */ +#include "dsk6713.h" +#include "dsk6713_aic23.h" + +// math library (trig functions) +#include <math.h> + +/* Some functions to help with Complex algebra and FFT. */ +#include "cmplx.h" +#include "fft_functions.h" + +// Some functions to help with writing/reading the audio ports when using interrupts. +#include <helper_functions_ISR.h> + +#define WINCONST 0.85185 /* 0.46/0.54 for Hamming window */ +#define FSAMP 8000.0 /* sample frequency, ensure this matches Config for AIC */ +#define FFTLEN 256 /* fft length = frame length 256/8000 = 32 ms*/ +#define NFREQ (1+FFTLEN/2) /* number of frequency bins from a real FFT */ +#define OVERSAMP 4 /* oversampling ratio (2 or 4) */ +#define FRAMEINC (FFTLEN/OVERSAMP) /* Frame increment */ +#define CIRCBUF (FFTLEN+FRAMEINC) /* length of I/O buffers */ +#define FRAME_TIME 2.5 +#define MAX_COUNT 20000 +#define MAX_FLOAT 3.4E+38 +#define OUTGAIN 16000.0 /* Output gain for DAC */ +#define INGAIN (1.0/16000.0) /* Input gain for ADC */ +#define NUM_M 4 +#define NUM_ALPHA 4 +// PI defined here for use in your code +#define PI 3.141592653589793 +#define TFRAME FRAMEINC/FSAMP /* time between calculation of each frame */ + +/******************************* Global declarations ********************************/ + +/* Audio port configuration settings: these values set registers in the AIC23 audio + interface to configure it. See TI doc SLWS106D 3-3 to 3-10 for more info. */ +DSK6713_AIC23_Config Config = { \ + /**********************************************************************/ + /* REGISTER FUNCTION SETTINGS */ + /**********************************************************************/\ + 0x0017, /* 0 LEFTINVOL Left line input channel volume 0dB */\ + 0x0017, /* 1 RIGHTINVOL Right line input channel volume 0dB */\ + 0x01f9, /* 2 LEFTHPVOL Left channel headphone volume 0dB */\ + 0x01f9, /* 3 RIGHTHPVOL Right channel headphone volume 0dB */\ + 0x0011, /* 4 ANAPATH Analog audio path control DAC on, Mic boost 20dB*/\ + 0x0000, /* 5 DIGPATH Digital audio path control All Filters off */\ + 0x0000, /* 6 DPOWERDOWN Power down control All Hardware on */\ + 0x0043, /* 7 DIGIF Digital audio interface format 16 bit */\ + 0x008d, /* 8 SAMPLERATE Sample rate control 8 KHZ-ensure matches FSAMP */\ + 0x0001 /* 9 DIGACT Digital interface activation On */\ + /**********************************************************************/ +}; + +// Codec handle:- a variable used to identify audio interface +DSK6713_AIC23_CodecHandle H_Codec; + +float *inbuffer, *outbuffer; /* Input/output circular buffers */ +float *inframe, *outframe; /* Input and output frames */ +float *inwin, *outwin; /* Input and output windows */ +float ingain, outgain; /* ADC and DAC gains */ +float cpufrac; /* Fraction of CPU time used */ +complex *fft_out; /* FFT output */ +float *noise; +float *power_in; +float *mag_in; +float* p_w; +float* prev_noise; +float* SNR; +volatile int io_ptr=0; /* Input/ouput pointer for circular buffers */ +volatile int frame_ptr=0; /* Frame pointer */ +volatile int frame_ctr = 0; +volatile int m_ptr = 0; +float snr_val = 0; +float total_snr = 0; +float lambda = 0.05; +float alpha[NUM_ALPHA] = {300, 400, 600, 1000}; +float avg = 0; +float sum = 0; +float *M[NUM_M]; +float mag_N_X; +float K; +float time_constant = 40e-3; /* Time constant in ms */ +int started = 0; + /******************************* Function prototypes *******************************/ +void init_hardware(void); /* Initialize codec */ +void init_HWI(void); /* Initialize hardware interrupts */ +void ISR_AIC(void); /* Interrupt service routine for codec */ +void process_frame(void); /* Frame processing routine */ +void write_spectrum(void); +void get_noise(void); +void low_pass_filter(float* current, float* next); +void overestimation(void); +/********************************** Main routine ************************************/ +void main() +{ + + int k; // used in various for loops + int counter = 1; +/* Initialize and zero fill arrays */ + + inbuffer = (float *) calloc(CIRCBUF, sizeof(float)); /* Input array */ + outbuffer = (float *) calloc(CIRCBUF, sizeof(float)); /* Output array */ + inframe = (float *) calloc(FFTLEN, sizeof(float)); /* Array for processing*/ + outframe = (float *) calloc(FFTLEN, sizeof(float)); /* Array for processing*/ + inwin = (float *) calloc(FFTLEN, sizeof(float)); /* Input window */ + outwin = (float *) calloc(FFTLEN, sizeof(float)); /* Output window */ + fft_out = (complex *) calloc(FFTLEN, sizeof(complex)); /* FFT Output */ + power_in = (float *) calloc(FFTLEN, sizeof(float)); /* Output window */ + p_w = (float *) calloc(FFTLEN, sizeof(float)); /* Output window */ + mag_in = (float *) calloc(FFTLEN, sizeof(float)); /* Output window */ + noise = (float *) calloc(FFTLEN, sizeof(float)); /* Output window */ + prev_noise = (float *) calloc(FFTLEN, sizeof(float)); /* Output window */ + SNR = (float *) calloc(FFTLEN, sizeof(float)); /* Output window */ + for(k = 0; k < FFTLEN; ++k) { + SNR[k] = 0; + } + /* initialize board and the audio port */ + init_hardware(); + + /* initialize hardware interrupts */ + init_HWI(); + +/* initialize algorithm constants */ + + for (k=0; k<FFTLEN; ++k) + { + inwin[k] = sqrt((1.0-WINCONST*cos(PI*(2*k+1)/FFTLEN))/OVERSAMP); + outwin[k] = inwin[k]; + } + ingain=INGAIN; + outgain=OUTGAIN; + + for (k = 0; k < NUM_M; ++k) { + M[k] = (float *) calloc(FFTLEN, sizeof(float)); + } + + K = exp(-TFRAME/time_constant); + /* main loop, wait for interrupt */ + while(1) { + process_frame(); + counter++; + snr_val = total_snr / counter; + } +} + +/********************************** init_hardware() *********************************/ +void init_hardware() +{ + // Initialize the board support library, must be called first + DSK6713_init(); + + // Start the AIC23 codec using the settings defined above in config + H_Codec = DSK6713_AIC23_openCodec(0, &Config); + + /* Function below sets the number of bits in word used by MSBSP (serial port) for + receives from AIC23 (audio port). We are using a 32 bit packet containing two + 16 bit numbers hence 32BIT is set for receive */ + MCBSP_FSETS(RCR1, RWDLEN1, 32BIT); + + /* Configures interrupt to activate on each consecutive available 32 bits + from Audio port hence an interrupt is generated for each L & R sample pair */ + MCBSP_FSETS(SPCR1, RINTM, FRM); + + /* These commands do the same thing as above but applied to data transfers to the + audio port */ + MCBSP_FSETS(XCR1, XWDLEN1, 32BIT); + MCBSP_FSETS(SPCR1, XINTM, FRM); + + +} +/********************************** init_HWI() **************************************/ +void init_HWI(void) +{ + IRQ_globalDisable(); // Globally disables interrupts + IRQ_nmiEnable(); // Enables the NMI interrupt (used by the debugger) + IRQ_map(IRQ_EVT_RINT1,4); // Maps an event to a physical interrupt + IRQ_enable(IRQ_EVT_RINT1); // Enables the event + IRQ_globalEnable(); // Globally enables interrupts + +} + +// Spectrum calculations for the new values +void write_spectrum(void) { + unsigned int k; + for(k = 0; k < FFTLEN; ++k) { + if(power_in[k] < M[m_ptr][k] || M[m_ptr][k] == 0) { + M[m_ptr][k] = power_in[k]; + } + } +} + +// Noise estimataion +void get_noise(void) { + int k, i, min_i; + float min_val; + + for(k = 0; k < FFTLEN; ++k) { + min_i = 0; + min_val = M[0][k]; + for(i = 1; i < NUM_M; ++i) { + if (M[i][k] < min_val && M[i][k]!= 0) { + min_val = M[i][k]; + min_i = i; + } + } + noise[k] = M[min_i][k]; + } + + overestimation(); +} + + + +void overestimation(void) { + int i; + sum = 0; + // Calcualte |signal^2/noise^2| for all k + for (i = 0; i < FFTLEN; ++i) { + if(noise[i] != 0) { + SNR[i] = power_in[i] / noise[i]; + sum += SNR[i]; + } + } + + // Calculate average + sum /= FFTLEN; + total_snr += sum; + // Use SNRs to divide + for (i = 0; i < FFTLEN; ++i) { + // Normalising + SNR[i] /= 2*sum; + SNR[i] = SNR[i] > 1 ? 1 : SNR[i]; + noise[i] *= alpha[(int)(SNR[i] * (NUM_ALPHA-1))]; + } +} + +// Low pass filter X(w) +void low_pass_filter(float* current, float* next) { + int w; + float temp; + for (w = 0; w < FFTLEN; ++w) { + current[w] = (1-K)*current[w] + K*next[w]; + next[w] = current[w]; + } +} + +/******************************** process_frame() ***********************************/ +void process_frame(void) +{ + int k, m; + int io_ptr0; + /* work out fraction of available CPU time used by algorithm */ + cpufrac = ((float) (io_ptr & (FRAMEINC - 1)))/FRAMEINC; + + /* wait until io_ptr is at the start of the current frame */ + while((io_ptr/FRAMEINC) != frame_ptr); + + /* then increment the framecount (wrapping if required) */ + if (++frame_ptr >= (CIRCBUF/FRAMEINC)) frame_ptr=0; + + /* save a pointer to the position in the I/O buffers (inbuffer/outbuffer) where the + data should be read (inbuffer) and saved (outbuffer) for the purpose of processing */ + io_ptr0=frame_ptr * FRAMEINC; + + /* copy input data from inbuffer into inframe (starting from the pointer position) */ + + m=io_ptr0; + for (k=0;k<FFTLEN;k++) + { + inframe[k] = inbuffer[m] * inwin[k]; + if (++m >= CIRCBUF) m=0; /* wrap if required */ + } + + /************************* DO PROCESSING OF FRAME HERE **************************/ + + // Initialise the array fft_out for FFT + for (k = 0; k < FFTLEN; ++k) { + fft_out[k] = cmplx(inframe[k], 0.0); + } + + // Perform the FFT + fft(FFTLEN, fft_out); + + // calculate the power spectrum + for (k = 0; k < FFTLEN; ++k) { + power_in[k] = fft_out[k].r * fft_out[k].r + fft_out[k].i * fft_out[k].i; + } + + low_pass_filter(power_in, p_w); + low_pass_filter(noise, prev_noise); + + // Get average of fft_out and write to Spectrum + write_spectrum(); + + // Set the noise + get_noise(); + + if(frame_ctr > MAX_COUNT-1) { + int i; + frame_ctr = 0; + if(++m_ptr == NUM_M) m_ptr = 0; + for(i = 0; i < FFTLEN; ++i) { + M[m_ptr][i] = power_in[i]; + } + } + + // max(lambda, |N(w)/g(w)| + for (k = 0; k < FFTLEN; ++k) { + float g; + mag_N_X = sqrt(1 - noise[k]/power_in[k]); + g = mag_N_X > lambda ? mag_N_X : lambda; + fft_out[k] = rmul(g, fft_out[k]); + } + + // Back into time domain + ifft(FFTLEN, fft_out); + + for (k = 0; k < FFTLEN; ++k) { + outframe[k] = fft_out[k].r; + } + /********************************************************************************/ + + /* multiply outframe by output window and overlap-add into output buffer */ + + m=io_ptr0; + + for (k=0;k<(FFTLEN-FRAMEINC);k++) + { /* this loop adds into outbuffer */ + outbuffer[m] = outbuffer[m]+outframe[k]*outwin[k]; + if (++m >= CIRCBUF) m=0; /* wrap if required */ + } + + for (;k<FFTLEN;k++) + { + outbuffer[m] = outframe[k]*outwin[k]; /* this loop over-writes outbuffer */ + m++; + } +} +/*************************** INTERRUPT SERVICE ROUTINE *****************************/ + +// Map this to the appropriate interrupt in the CDB file + +void ISR_AIC(void) +{ + short sample; + /* Read and write the ADC and DAC using inbuffer and outbuffer */ + sample = mono_read_16Bit(); + inbuffer[io_ptr] = ((float)sample)*ingain; + /* write new output data */ + mono_write_16Bit((int)(outbuffer[io_ptr]*outgain)); + + /* update io_ptr and check for buffer wraparound */ + + if (++io_ptr >= CIRCBUF) io_ptr=0; + frame_ctr++; + started = 1; +} + +/************************************************************************************/ diff --git a/Project/RTDSP/frame.c b/Project/RTDSP/frame.c deleted file mode 100644 index a8fd350..0000000 --- a/Project/RTDSP/frame.c +++ /dev/null @@ -1,207 +0,0 @@ -/************************************************************************************* - DEPARTMENT OF ELECTRICAL AND ELECTRONIC ENGINEERING - IMPERIAL COLLEGE LONDON - - EE 3.19: Real Time Digital Signal Processing - Dr Paul Mitcheson and Daniel Harvey - - LAB 6: Frame Processing - - ********* F R A M E. C ********** - - Demonstrates Frame Processing (Interrupt driven) on the DSK. - - ************************************************************************************* - Updated for use on 6713 DSK by Danny Harvey: May-Aug 2006 - Updated for ccsV4 Sept 2010 - ************************************************************************************/ -/* - * You should modify the code so that an FFT is applied to an input frame - * which is then IFFT'd and sent to the audio port. - */ -/**************************** Pre-processor statements ******************************/ - -// Included so program can make use of DSP/BIOS configuration tool. -#include <stdlib.h> -#include "dsp_bios_cfg.h" - -/* The file dsk6713.h must be included in every program that uses the BSL. This - example also includes dsk6713_aic23.h because it uses the - AIC23 codec module (audio interface). */ -#include "dsk6713.h" -#include "dsk6713_aic23.h" - -// math library (trig functions) -#include <math.h> - -/* Some functions to help with Complex algebra and FFT. */ -#include "cmplx.h" -#include "fft_functions.h" - -// Some functions to help with writing/reading the audio ports when using interrupts. -#include <helper_functions_ISR.h> - - - -/******************************* Global declarations ********************************/ - -/* Audio port configuration settings: these values set registers in the AIC23 audio - interface to configure it. See TI doc SLWS106D 3-3 to 3-10 for more info. */ -DSK6713_AIC23_Config Config = { \ - /**********************************************************************/ - /* REGISTER FUNCTION SETTINGS */ - /**********************************************************************/\ - 0x0017, /* 0 LEFTINVOL Left line input channel volume 0dB */\ - 0x0017, /* 1 RIGHTINVOL Right line input channel volume 0dB */\ - 0x01f9, /* 2 LEFTHPVOL Left channel headphone volume 0dB */\ - 0x01f9, /* 3 RIGHTHPVOL Right channel headphone volume 0dB */\ - 0x0011, /* 4 ANAPATH Analog audio path control DAC on, Mic boost 20dB*/\ - 0x0000, /* 5 DIGPATH Digital audio path control All Filters off */\ - 0x0000, /* 6 DPOWERDOWN Power down control All Hardware on */\ - 0x0043, /* 7 DIGIF Digital audio interface format 16 bit */\ - 0x008d, /* 8 SAMPLERATE Sample rate control 8 KHZ */\ - 0x0001 /* 9 DIGACT Digital interface activation On */\ - /**********************************************************************/ -}; - -// Codec handle:- a variable used to identify audio interface -DSK6713_AIC23_CodecHandle H_Codec; - -// PI defined here for use in your code -#define PI 3.141592653589793 - -#define BUFLEN 128 /* Frame buffer length must be even for real fft */ - - -/* Pointers to data buffers */ -float *input; -float *intermediate; -float *output; -volatile int index = 0; - - - /******************************* Function prototypes *******************************/ -void init_hardware(void); -void init_HWI(void); -void ISR_AIC(void); -void init_arrays(void); -void wait_buffer(void); - -/********************************** Main routine ************************************/ -void main() -{ - - /* setup arrays */ - init_arrays(); - - /* initialize board and the audio port */ - init_hardware(); - - /* initialize hardware interrupts */ - init_HWI(); - - - /* loop indefinitely, waiting for interrupts */ - while(1) - { - wait_buffer(); - }; - -} - - - -/********************************** init_hardware() *********************************/ -void init_hardware() -{ - // Initialize the board support library, must be called first - DSK6713_init(); - - // Start the AIC23 codec using the settings defined above in config - H_Codec = DSK6713_AIC23_openCodec(0, &Config); - - /* Function below sets the number of bits in word used by MSBSP (serial port) for - receives from AIC23 (audio port). We are using a 32 bit packet containing two - 16 bit numbers hence 32BIT is set for receive */ - MCBSP_FSETS(RCR1, RWDLEN1, 32BIT); - - /* Configures interrupt to activate on each consecutive available 32 bits - from Audio port hence an interrupt is generated for each L & R sample pair */ - MCBSP_FSETS(SPCR1, RINTM, FRM); - - /* These commands do the same thing as above but applied to data transfers to - the audio port */ - MCBSP_FSETS(XCR1, XWDLEN1, 32BIT); - MCBSP_FSETS(SPCR1, XINTM, FRM); - - -} -/********************************** init_HWI() **************************************/ -void init_HWI(void) -{ - IRQ_globalDisable(); // Globally disables interrupts - IRQ_nmiEnable(); // Enables the NMI interrupt (used by the debugger) - IRQ_map(IRQ_EVT_RINT1,4); // Maps an event to a physical interrupt - IRQ_enable(IRQ_EVT_RINT1); // Enables the event - IRQ_globalEnable(); // Globally enables interrupts - -} -/************************** Allocate memory for arrays *******************************/ -void init_arrays(void) -{ - input = (float *) calloc(BUFLEN, sizeof(float)); /* Input array */ - output = (float *) calloc(BUFLEN, sizeof(float)); /* Output array */ - intermediate = (float *) calloc(BUFLEN, sizeof(float)); /* Array for processing*/ -} - -/*************************** INTERRUPT SERVICE ROUTINE ******************************/ - -// Map this to the appropriate interrupt in the DSP BIOS - -void ISR_AIC(void) -{ - short sample; - float scale = 11585; - - sample = mono_read_16Bit(); - - /* add new data to input buffer - and scale so that 1v ~= 1.0 */ - input[index] = ((float)sample)/scale; - - /* write new output data */ - mono_write_16Bit((short)(output[index]*scale)); - - /* update index and check for full buffer */ - if (++index == BUFLEN) - index=0; -} - -/******************* Wait for buffer of data to be input/output **********************/ -void wait_buffer(void) -{ - float *p; - - /* wait for array index to be set to zero by ISR */ - while(index); - - /* rotate data arrays */ - p = input; - input = output; - output = intermediate; - intermediate = p; - - /************************* DO PROCESSING OF FRAME HERE **************************/ - - - /*please add your code */ - - - /**********************************************************************************/ - - /* wait here in case next sample has not yet been read in */ - while(!index); -} - - - diff --git a/Project/TestCode/dft.c b/Project/TestCode/dft.c new file mode 100644 index 0000000..e82cb3e --- /dev/null +++ b/Project/TestCode/dft.c @@ -0,0 +1,64 @@ +#include <math.h> +#include <stdio.h> +#include <stdlib.h> + +#define E_PI 3.1415926535897932384626433832795028841971693993751058209749445923078164062 +#define N_DEF 8 + +typedef struct { + float r; + float i; +} Complex; + +float x[] = {0, 0, 2, 3, 4, 0, 0, 0}; + +void dft(int N, Complex *X) { + int i, n, k; + Complex *x = malloc(N * sizeof(X[0])); + for(i = 0; i < N; ++i) { + x[i] = X[i]; + } + for(k = 0; k < N; ++k) { + X[k].r = 0.f; + X[k].i = 0.f; + for(n = 0; n < N; ++n) { + X[k].r += x[n].r * cos(2 * E_PI * k * n / N); + X[k].i -= x[n].r * sin(2 * E_PI * k * n / N); + } + } + free(x); +} + +void idft(int N, Complex *X) { + int i, n, k; + Complex *x = malloc(N * sizeof(X[0])); + for(i = 0; i < N; ++i) { + x[i] = X[i]; + } + for(n = 0; n < N; ++n) { + X[n].i = 0.f; + X[n].r = 0.f; + for(k = 0; k < N; ++k) { + X[n].r += x[k].r * cos(2 * E_PI * k * n / N) - x[k].i * sin(2 * E_PI * k * n / N); + } + X[n].r /= N; + } + free(x); +} + +int main() { + int k; + Complex X_C[8]; + for(k = 0; k < N_DEF; ++k) { + X_C[k].r = x[k]; + X_C[k].i = 0; + } + dft(N_DEF, X_C); + for(k = 0; k < N_DEF; ++k) { + printf("x[%d] = %.2f, X[%d] = %.2f + %.2fi\n", k, x[k], k, X_C[k].r, X_C[k].i); + } + idft(N_DEF, X_C); + for(k = 0; k < N_DEF; ++k) { + printf("x[%d] = %.2f, X[%d] = %.2f + %.2fi\n", k, x[k], k, X_C[k].r, X_C[k].i); + } +} |
