svn commit: r244893 - in user/adrian/ath_radar_stuff/src/spectral_fft: . font samples
Adrian Chadd
adrian at FreeBSD.org
Mon Dec 31 06:47:17 UTC 2012
Author: adrian
Date: Mon Dec 31 06:47:16 2012
New Revision: 244893
URL: http://svnweb.freebsd.org/changeset/base/244893
Log:
Bring over the spectral fft code from Simon over at linux-wireless.
This is GPLed, be careful.
Added:
user/adrian/ath_radar_stuff/src/spectral_fft/
user/adrian/ath_radar_stuff/src/spectral_fft/COPYING
user/adrian/ath_radar_stuff/src/spectral_fft/Makefile
user/adrian/ath_radar_stuff/src/spectral_fft/README
user/adrian/ath_radar_stuff/src/spectral_fft/fft_eval.c
user/adrian/ath_radar_stuff/src/spectral_fft/font/
user/adrian/ath_radar_stuff/src/spectral_fft/font/AUTHORS
user/adrian/ath_radar_stuff/src/spectral_fft/font/COPYING
user/adrian/ath_radar_stuff/src/spectral_fft/font/ChangeLog
user/adrian/ath_radar_stuff/src/spectral_fft/font/LiberationSans-Regular.ttf (contents, props changed)
user/adrian/ath_radar_stuff/src/spectral_fft/font/License.txt
user/adrian/ath_radar_stuff/src/spectral_fft/font/README
user/adrian/ath_radar_stuff/src/spectral_fft/samples/
user/adrian/ath_radar_stuff/src/spectral_fft/samples/ar9223_analog_camera_ch1.dump (contents, props changed)
user/adrian/ath_radar_stuff/src/spectral_fft/samples/ar9280_analog_camera_ch1.dump (contents, props changed)
user/adrian/ath_radar_stuff/src/spectral_fft/samples/ar9390_analog_camera_ch1.dump (contents, props changed)
Added: user/adrian/ath_radar_stuff/src/spectral_fft/COPYING
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/adrian/ath_radar_stuff/src/spectral_fft/COPYING Mon Dec 31 06:47:16 2012 (r244893)
@@ -0,0 +1,340 @@
+ GNU GENERAL PUBLIC LICENSE
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Added: user/adrian/ath_radar_stuff/src/spectral_fft/Makefile
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/adrian/ath_radar_stuff/src/spectral_fft/Makefile Mon Dec 31 06:47:16 2012 (r244893)
@@ -0,0 +1,10 @@
+SRCS= fft_eval.c
+
+CFLAGS+= -I/usr/local/include
+LDFLAGS+= -L/usr/local/lib
+LDLIBS+= -lSDL -lSDL_ttf
+
+all: fft_eval
+
+clean:
+ rm -f *.o fft_eval
Added: user/adrian/ath_radar_stuff/src/spectral_fft/README
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/adrian/ath_radar_stuff/src/spectral_fft/README Mon Dec 31 06:47:16 2012 (r244893)
@@ -0,0 +1,59 @@
+DESCRIPTION
+===========
+
+This program has been created to aid open source spectrum
+analyzer development for Qualcomm/Atheros AR92xx and AR93xx
+based chipsets.
+
+It visualizes the FFT data reported by the chips to help intepreting
+and understanding the data.
+
+TODO: The interpreted data format is unknown! Please help
+investigating the data, or help acquiring information about the
+data format from Qualcomm Atheros!
+
+BUILD
+=====
+
+You need to have SDL and SDL_ttf development packages installed
+on your system, as well as make and gcc.
+
+Just type make to build the program:
+
+$ make
+gcc -O2 -Wall -pedantic -c -o fft_eval.o fft_eval.c
+gcc -lSDL -lSDL_ttf -o fft_eval fft_eval.o
+$
+
+USAGE
+=====
+
+First, you need to acquire sample data from your spectral-scan enabled
+Atheros WiFi card. If the patches are applied correctly, you can use
+the following commands:
+
+ifconfig wlan0 up
+iw dev wlan0 scan spec-scan
+cat /sys/kernel/debug/ieee80211/phy0/ath9k/spectral_scan > /tmp/fft_results
+
+There are some recorded samples in the "samples" directory to try it
+out without actual hardware.
+
+To view the FFT results, use:
+
+./fft_eval /tmp/fft_results
+
+Navigate through the currently selected datasets using the arrow keys (left
+and right). Scroll through the spectrum using the Page Up/Down keys.
+
+
+LICENSE
+=======
+
+Read the GPL v2 file 'COPYING'.
+
+AUTHOR
+======
+
+This software has been written by Simon Wunderlich <siwu at hrz.tu-chemnitz.de>
+for Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
Added: user/adrian/ath_radar_stuff/src/spectral_fft/fft_eval.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/adrian/ath_radar_stuff/src/spectral_fft/fft_eval.c Mon Dec 31 06:47:16 2012 (r244893)
@@ -0,0 +1,536 @@
+/*
+ * Copyright (C) 2012 Simon Wunderlich <siwu at hrz.tu-chemnitz.de>
+ * Copyright (C) 2012 Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * 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
+ *
+ */
+
+/*
+ * This program has been created to aid open source spectrum
+ * analyzer development for Qualcomm/Atheros AR92xx and AR93xx
+ * based chipsets.
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <math.h>
+#include <SDL/SDL.h>
+#include <SDL/SDL_ttf.h>
+
+typedef int8_t s8;
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint64_t u64;
+
+/* taken from ath9k.h */
+#define SPECTRAL_HT20_NUM_BINS 56
+
+enum ath_fft_sample_type {
+ ATH_FFT_SAMPLE_HT20 = 0
+};
+
+struct fft_sample_tlv {
+ u8 type; /* see ath_fft_sample */
+ u16 length;
+ /* type dependent data follows */
+} __attribute__((packed));
+
+struct fft_sample_ht20 {
+ struct fft_sample_tlv tlv;
+
+ u8 __alignment;
+
+ u16 freq;
+ s8 rssi;
+ s8 noise;
+
+ u16 max_magnitude;
+ u8 max_index;
+ u8 bitmap_weight;
+
+ u64 tsf;
+
+ u16 data[SPECTRAL_HT20_NUM_BINS];
+} __attribute__((packed));
+
+
+struct scanresult {
+ struct fft_sample_ht20 sample;
+ struct scanresult *next;
+};
+
+#define WIDTH 1600
+#define HEIGHT 650
+#define BPP 32
+
+#define X_SCALE 10
+#define Y_SCALE 4
+
+#define RMASK 0x000000ff
+#define RBITS 0
+#define GMASK 0x0000ff00
+#define GBITS 8
+#define BMASK 0x00ff0000
+#define BBITS 16
+#define AMASK 0xff000000
+
+
+SDL_Surface *screen = NULL;
+TTF_Font *font = NULL;
+struct scanresult *result_list;
+int scanresults_n = 0;
+
+int graphics_init_sdl(void)
+{
+ SDL_VideoInfo *VideoInfo;
+ int SDLFlags;
+
+ SDLFlags = SDL_HWPALETTE | SDL_RESIZABLE;
+
+ if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) < 0) {
+ fprintf(stderr, "Initializing SDL failed\n");
+ return -1;
+ }
+
+ if ((VideoInfo = (SDL_VideoInfo *) SDL_GetVideoInfo()) == NULL) {
+ fprintf(stderr, "Getting SDL Video Info failed\n");
+ return -1;
+ }
+
+ else {
+ if (VideoInfo->hw_available) {
+ SDLFlags |= SDL_HWSURFACE;
+ } else {
+ SDLFlags |= SDL_SWSURFACE;
+ }
+ if (VideoInfo->blit_hw)
+ SDLFlags |= SDL_HWACCEL;
+ }
+
+ SDL_WM_SetCaption("FFT eval", "FFT eval");
+ screen = SDL_SetVideoMode(WIDTH, HEIGHT, BPP, SDLFlags);
+
+ if (TTF_Init() < 0) {
+ fprintf(stderr, "Initializing SDL TTF failed\n");
+ return -1;
+ }
+
+ font = TTF_OpenFont("font/LiberationSans-Regular.ttf", 14);
+ if (!font) {
+ fprintf(stderr, "Opening font failed\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+void graphics_quit_sdl(void)
+{
+ SDL_Quit();
+}
+
+int pixel(Uint32 *pixels, int x, int y, Uint32 color)
+{
+ if (x < 0 || x >= WIDTH)
+ return -1;
+ if (y < 0 || y >= HEIGHT)
+ return -1;
+
+ pixels[x + y * WIDTH] |= color;
+ return 0;
+}
+
+
+#define SIZE 3
+/* this function blends a 2*SIZE x 2*SIZE blob at the given position with
+ * the defined opacity. */
+int bigpixel(Uint32 *pixels, int x, int y, Uint32 color, uint8_t opacity)
+{
+ int x1, y1;
+
+ if (x - SIZE < 0 || x + SIZE >= WIDTH)
+ return -1;
+ if (y - SIZE < 0 || y + SIZE >= HEIGHT)
+ return -1;
+
+ for (x1 = x - SIZE; x1 < x + SIZE; x1++)
+ for (y1 = y - SIZE; y1 < y + SIZE; y1++) {
+ Uint32 r, g, b;
+
+ r = ((pixels[x1 + y1 * WIDTH] & RMASK) >> RBITS) + ((((color & RMASK) >> RBITS) * opacity) / 255);
+ if (r > 255) r = 255;
+ g = ((pixels[x1 + y1 * WIDTH] & GMASK) >> GBITS) + ((((color & GMASK) >> GBITS) * opacity) / 255);
+ if (g > 255) g = 255;
+ b = ((pixels[x1 + y1 * WIDTH] & BMASK) >> BBITS) + ((((color & BMASK) >> BBITS) * opacity) / 255);
+ if (b > 255) b = 255;
+
+ pixels[x1 + y1 * WIDTH] = r << RBITS | g << GBITS | b << BBITS | (color & AMASK);
+ }
+ return 0;
+}
+
+int render_text(SDL_Surface *surface, char *text, int x, int y)
+{
+ SDL_Surface *text_surface;
+ SDL_Color fontcolor = {255, 255, 255, 255};
+ SDL_Rect fontdest = {0, 0, 0, 0};
+
+ fontdest.x = x;
+ fontdest.y = y;
+
+ text_surface = TTF_RenderText_Solid(font, text, fontcolor);
+ if (!text_surface)
+ return -1;
+
+ SDL_BlitSurface(text_surface, NULL, surface, &fontdest);
+ SDL_FreeSurface(text_surface);
+
+ return 0;
+}
+
+/*
+ * draw_picture - draws the current screen.
+ *
+ * @highlight: the index of the dataset to be highlighted
+ *
+ * returns the center frequency of the currently highlighted dataset
+ */
+int draw_picture(int highlight, int startfreq)
+{
+ Uint32 *pixels, color, opacity;
+ int x, y, i, rnum;
+ int highlight_freq = startfreq + 20;
+ char text[1024];
+ struct scanresult *result;
+ SDL_Surface *surface;
+
+ surface = SDL_CreateRGBSurface(SDL_SWSURFACE, WIDTH, HEIGHT, BPP, RMASK, GMASK, BMASK, AMASK);
+ pixels = (Uint32 *) surface->pixels;
+ for (y = 0; y < HEIGHT; y++)
+ for (x = 0; x < WIDTH; x++)
+ pixels[x + y * WIDTH] = AMASK;
+
+ /* vertical lines (frequency) */
+ for (i = 2300; i < 6000; i += 10) {
+ x = (X_SCALE * (i - startfreq));
+
+ if (x < 0 || x > WIDTH)
+ continue;
+
+ for (y = 0; y < HEIGHT - 20; y++)
+ pixels[x + y * WIDTH] = 0x40404040 | AMASK;
+
+ snprintf(text, sizeof(text), "%d MHz", i);
+ render_text(surface, text, x - 30, HEIGHT - 20);
+ }
+
+ /* horizontal lines (dBm) */
+ for (i = 0; i < 150; i += 10) {
+ y = 600 - Y_SCALE * i;
+
+ for (x = 0; x < WIDTH; x++)
+ pixels[x + y * WIDTH] = 0x40404040 | AMASK;
+
+ snprintf(text, sizeof(text), "-%d dBm", (150 - i));
+ render_text(surface, text, 5, y - 15);
+ }
+
+
+ rnum = 0;
+ for (result = result_list; result ; result = result->next) {
+ int datamax = 0, datamin = 65536;
+ int datasquaresum = 0;
+
+ for (i = 0; i < SPECTRAL_HT20_NUM_BINS; i++) {
+ int data;
+
+ data = result->sample.data[i] * result->sample.data[i];
+ datasquaresum += data;
+ if (data > datamax) datamax = data;
+ if (data < datamin) datamin = data;
+ }
+
+ if (rnum == highlight) {
+ /* prints some statistical data about the currently selected
+ * data sample and auxiliary data. */
+ printf("result[%03d]: freq %04d rssi %03d, noise %03d, max_magnitude %04d max_index %03d bitmap_weight %03d tsf %llu | ",
+ rnum, result->sample.freq, result->sample.rssi, result->sample.noise,
+ result->sample.max_magnitude, result->sample.max_index, result->sample.bitmap_weight,
+ result->sample.tsf);
+ printf("datamax = %d, datamin = %d, datasquaresum = %d\n", datamax, datamin, datasquaresum);
+
+ highlight_freq = result->sample.freq;
+ }
+
+
+ for (i = 0; i < SPECTRAL_HT20_NUM_BINS; i++) {
+ float freq;
+ float signal;
+ int data;
+ freq = result->sample.freq - 10.0 + ((20.0 * i) / SPECTRAL_HT20_NUM_BINS);
+
+ x = (X_SCALE * (freq - startfreq));
+
+ /* This is where the "magic" happens: interpret the signal
+ * to output some kind of data which looks useful. */
+
+ data = result->sample.data[i];
+ if (data == 0)
+ data = 1;
+ signal = result->sample.noise + result->sample.rssi + 20 * log10f(data) - log10f(datasquaresum) * 10;
+
+ y = 400 - (400.0 + Y_SCALE * signal);
+
+ if (rnum == highlight) {
+ color = RMASK | AMASK;
+ opacity = 255;
+ } else {
+ color = BMASK | AMASK;
+ opacity = 30;
+ }
+
+ if (bigpixel(pixels, x, y, color, opacity) < 0)
+ continue;
+
+ }
+ rnum++;
+ }
+
+ SDL_BlitSurface(surface, NULL, screen, NULL);
+ SDL_FreeSurface(surface);
+ SDL_Flip(screen);
+
+ return highlight_freq;
+}
+
+/* read_file - reads an file into a big buffer and returns it
+ *
+ * @fname: file name
+ *
+ * returns the buffer with the files content
+ */
+char *read_file(char *fname, size_t *size)
+{
+ FILE *fp;
+ char *buf = NULL;
+ size_t ret;
+
+ fp = fopen(fname, "r");
+
+ if (!fp)
+ return NULL;
+
+ *size = 0;
+ while (!feof(fp)) {
+
+ buf = realloc(buf, *size + 4097);
+ if (!buf)
+ return NULL;
+
+ ret = fread(buf + *size, 1, 4096, fp);
+ *size += ret;
+ }
+ fclose(fp);
+
+ buf[*size] = 0;
+
+ return buf;
+}
+
+/*
+ * read_scandata - reads the fft scandata and compiles a linked list of datasets
+ *
+ * @fname: file name
+ *
+ * returns 0 on success, -1 on error.
+ */
+int read_scandata(char *fname)
+{
+ char *pos, *scandata;
+ size_t len, sample_len;
+ struct scanresult *result;
+ struct fft_sample_tlv *tlv;
+ struct scanresult *tail = result_list;
+
+ scandata = read_file(fname, &len);
+ if (!scandata)
+ return -1;
+
+ pos = scandata;
+
+ while (pos - scandata < len) {
+ tlv = (struct fft_sample_tlv *) pos;
+ sample_len = sizeof(*tlv) + tlv->length;
+ pos += sample_len;
+ if (tlv->type != ATH_FFT_SAMPLE_HT20) {
+ fprintf(stderr, "unknown sample type (%d)\n", tlv->type);
+ continue;
+ }
+
+ if (sample_len != sizeof(result->sample)) {
+ fprintf(stderr, "wrong sample length (have %d, expected %d)\n", sample_len, sizeof(result->sample));
+ continue;
+ }
+
+ result = malloc(sizeof(*result));
+ if (!result)
+ continue;
+
+ memset(result, 0, sizeof(*result));
+ memcpy(&result->sample, tlv, sizeof(result->sample));
+ fprintf(stderr, "copy %d bytes\n", sizeof(result->sample));
+
+ if (tail)
+ tail->next = result;
+ else
+ result_list = result;
+
+ tail = result;
+
+ scanresults_n++;
+ }
+
+ fprintf(stderr, "read %d scan results\n", scanresults_n);
+ return 0;
+}
+
+/*
+ * graphics_main - sets up the data and holds the mainloop.
+ *
+ */
+void graphics_main(void)
+{
+ SDL_Event event;
+ int quit = 0;
+ int highlight = 0;
+ int change = 1, scroll = 0;
+ int startfreq = 2350, accel = 0;
+ int highlight_freq = startfreq;
+
+ if (graphics_init_sdl() < 0) {
+ fprintf(stderr, "Failed to initialize graphics.\n");
+ return;
+ }
+ SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL);
+ while (!quit) {
+ if (change) {
+ highlight_freq = draw_picture(highlight, startfreq);
+ change = 0;
+ }
+
+ if (!scroll) {
+ /* move to highlighted object */
+ if (highlight_freq - 20 < startfreq)
+ accel = -10;
+ if (highlight_freq > (startfreq + WIDTH/X_SCALE))
+ accel = 10;
+
+ /* if we are "far off", move a little bit faster */
+ if (highlight_freq + 300 < startfreq)
+ accel = -100;
+
+ if (highlight_freq - 300 > (startfreq + WIDTH/X_SCALE))
+ accel = 100;
+ }
+
+ if (accel)
+ SDL_PollEvent(&event);
+ else
+ SDL_WaitEvent(&event);
+
+ switch (event.type) {
+ case SDL_QUIT:
+ quit = 1;
+ break;
+ case SDL_KEYDOWN:
+ switch (event.key.keysym.sym) {
+ case SDLK_LEFT:
+ if (highlight > 0) {
+ highlight--;
+ scroll = 0;
+ change = 1;
+ }
+ break;
+ case SDLK_RIGHT:
+ if (highlight < scanresults_n - 1){
+ highlight++;
+ scroll = 0;
+ change = 1;
+ }
+ break;
+ case SDLK_PAGEUP:
+ accel-= 2;
+ scroll = 1;
+ break;
+ case SDLK_PAGEDOWN:
+ accel+= 2;
+ scroll = 1;
+ default:
+ break;
+ }
+ break;
+ }
+ if (accel) {
+ startfreq += accel;
+ if (accel > 0) accel--;
+ if (accel < 0) accel++;
+ change = 1;
+ }
+ if (startfreq < 2300) startfreq = 2300;
+ if (startfreq > 6000) startfreq = 6000;
+ if (accel < -20) accel = -20;
+ if (accel > 20) accel = 20;
+ }
+
+ graphics_quit_sdl();
+}
+
+void usage(int argc, char *argv[])
+{
+ fprintf(stderr, "Usage: %s [scanfile]\n", argv[0]);
+ fprintf(stderr, "\n");
+ fprintf(stderr, "scanfile is generated by the spectral analyzer feature\n");
+ fprintf(stderr, "of your wifi card. If you have a AR92xx or AR93xx based\n");
+ fprintf(stderr, "card, try:\n");
+ fprintf(stderr, "\n");
+ fprintf(stderr, "ifconfig wlan0 up\n");
+ fprintf(stderr, "iw dev wlan0 scan spec-scan\n");
+ fprintf(stderr, "cat /sys/kernel/debug/ieee80211/phy0/ath9k/spectral_scan > /tmp/fft_results\n");
+ fprintf(stderr, "%s /tmp/fft_results\n", argv[0]);
+ fprintf(stderr, "\n");
+ fprintf(stderr, "(NOTE: maybe debugfs must be mounted first: mount -t debugfs none /sys/kernel/debug/ )\n");
+ fprintf(stderr, "\n");
+
+}
+
+int main(int argc, char *argv[])
+{
+ if (argc < 2) {
+ usage(argc, argv);
+ return -1;
+ }
+
+ fprintf(stderr, "WARNING: Experimental Software! Don't trust anything you see. :)\n");
+ fprintf(stderr, "\n");
+ if (read_scandata(argv[1]) < 0) {
+ fprintf(stderr, "Couldn't read scanfile ...\n");
+ usage(argc, argv);
+ return -1;
+ }
+ graphics_main();
+
+ return 0;
+}
Added: user/adrian/ath_radar_stuff/src/spectral_fft/font/AUTHORS
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/adrian/ath_radar_stuff/src/spectral_fft/font/AUTHORS Mon Dec 31 06:47:16 2012 (r244893)
@@ -0,0 +1,10 @@
+Font Designer:
+ Ascender Corporation.
+ http://www.ascendercorp.com/
+
+Original Designer:
+ Steve Matteson
+ http://www.ascendercorp.com/typedesigners.html
+
+Current Maintainer:
+ Caius Chance <cchance at redhat.com>
Added: user/adrian/ath_radar_stuff/src/spectral_fft/font/COPYING
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/adrian/ath_radar_stuff/src/spectral_fft/font/COPYING Mon Dec 31 06:47:16 2012 (r244893)
@@ -0,0 +1,340 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+ 59 Temple Place, Suite 330, Boston, MA 02111-1307 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
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
*** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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