kopia lustrzana https://github.com/windytan/slowrx
270 wiersze
7.6 KiB
C
270 wiersze
7.6 KiB
C
/*
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* slowrx - an SSTV decoder
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* * * * * * * * * * * * * *
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <math.h>
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#include <time.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <gtk/gtk.h>
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#include <pthread.h>
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#include <alsa/asoundlib.h>
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#include <fftw3.h>
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#include "common.h"
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void ensure_dir_exists(const char *dir) {
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struct stat buf;
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int i = stat(dir, &buf);
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if (i != 0) {
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if (mkdir(dir, 0777) != 0) {
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perror("Unable to create directory for output file");
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exit(EXIT_FAILURE);
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}
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}
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}
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void *Listen() {
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int Skip = 0;
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char timestr[40], rctime[8];
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GString *pngfilename;
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guchar Mode=0;
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double Rate;
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struct tm *timeptr = NULL;
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time_t timet;
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bool Finished;
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GdkPixbuf *thumbbuf;
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char id[20];
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GtkTreeIter iter;
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/** Prepare FFT **/
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in = fftw_malloc(sizeof(double) * 2048);
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if (in == NULL) {
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perror("GetVideo: Unable to allocate memory for FFT");
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exit(EXIT_FAILURE);
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}
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out = fftw_malloc(sizeof(double) * 2048);
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if (out == NULL) {
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perror("GetVideo: Unable to allocate memory for FFT");
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fftw_free(in);
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exit(EXIT_FAILURE);
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}
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memset(in, 0, sizeof(double) * 2048);
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memset(out, 0, sizeof(double) * 2048);
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Plan1024 = fftw_plan_r2r_1d(1024, in, out, FFTW_FORWARD, FFTW_ESTIMATE);
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Plan2048 = fftw_plan_r2r_1d(2048, in, out, FFTW_FORWARD, FFTW_ESTIMATE);
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while (true) {
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gdk_threads_enter ();
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gtk_widget_set_sensitive (gui.grid_vu, true);
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gtk_widget_set_sensitive (gui.button_abort, false);
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gtk_widget_set_sensitive (gui.button_clear, true);
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gdk_threads_leave ();
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HedrShift = 0;
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PcmPointer = 0;
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Rate = 44100;
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snd_pcm_prepare(pcm_handle);
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snd_pcm_start (pcm_handle);
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Abort = false;
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do {
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// Wait for VIS
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Mode = GetVIS();
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// Stop listening on ALSA error
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if (Abort) pthread_exit(NULL);
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} while (Mode == 0);
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printf(" ==== %s ====\n", ModeSpec[Mode].Name);
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// Store time of reception
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timet = time(NULL);
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timeptr = gmtime(&timet);
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strftime(timestr, sizeof(timestr)-1,"%Y%m%d-%H%M%Sz", timeptr);
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// Allocate space for cached Lum
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StoredLum = calloc( (int)(ModeSpec[Mode].LineLen * ModeSpec[Mode].ImgHeight + 1) * 44100, sizeof(guchar));
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if (StoredLum == NULL) {
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perror("Listen: Unable to allocate memory for Lum");
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exit(EXIT_FAILURE);
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}
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// Allocate space for sync signal
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HasSync = calloc((int)(ModeSpec[Mode].LineLen * ModeSpec[Mode].ImgHeight / 1.5e-3 +1), sizeof(bool));
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if (HasSync == NULL) {
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perror("Listen: Unable to allocate memory for sync signal");
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exit(EXIT_FAILURE);
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}
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// Get video
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strftime(rctime, sizeof(rctime)-1, "%H:%Mz", timeptr);
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gdk_threads_enter ();
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gtk_label_set_text (GTK_LABEL(gui.label_fskid), "");
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gtk_widget_set_sensitive (gui.frame_manual, false);
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gtk_widget_set_sensitive (gui.combo_card, false);
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gtk_widget_set_sensitive (gui.button_abort, true);
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gtk_widget_set_sensitive (gui.button_clear, false);
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gtk_statusbar_push (GTK_STATUSBAR(gui.statusbar), 0, "Receiving video..." );
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gtk_label_set_markup (GTK_LABEL(gui.label_lastmode), ModeSpec[Mode].Name);
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gtk_label_set_markup (GTK_LABEL(gui.label_utc), rctime);
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gdk_threads_leave ();
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printf(" getvideo @ %.1f Hz, Skip %d, HedrShift %+d Hz\n", 44100.0, 0, HedrShift);
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Finished = GetVideo(Mode, 44100, 0, false);
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gdk_threads_enter ();
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gtk_widget_set_sensitive (gui.button_abort, false);
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gtk_widget_set_sensitive (gui.frame_manual, true);
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gtk_widget_set_sensitive (gui.combo_card, true);
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gdk_threads_leave ();
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id[0] = '\0';
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if (Finished && gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(gui.tog_fsk))) {
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gdk_threads_enter ();
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gtk_statusbar_push (GTK_STATUSBAR(gui.statusbar), 0, "Receiving FSK ID..." );
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gdk_threads_leave ();
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GetFSK(id);
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printf(" FSKID \"%s\"\n",id);
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gdk_threads_enter ();
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gtk_label_set_text (GTK_LABEL(gui.label_fskid), id);
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gdk_threads_leave ();
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}
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snd_pcm_drop(pcm_handle);
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if (Finished && gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(gui.tog_slant))) {
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// Fix slant
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setVU(0,-100);
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gdk_threads_enter ();
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gtk_statusbar_push (GTK_STATUSBAR(gui.statusbar), 0, "Calculating slant..." );
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gtk_widget_set_sensitive (gui.grid_vu, false);
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gdk_threads_leave ();
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printf(" FindSync @ %.1f Hz\n",Rate);
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Rate = FindSync(Mode, Rate, &Skip);
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// Final image
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gdk_threads_enter ();
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gtk_statusbar_push (GTK_STATUSBAR(gui.statusbar), 0, "Redrawing..." );
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gdk_threads_leave ();
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printf(" getvideo @ %.1f Hz, Skip %d, HedrShift %+d Hz\n", Rate, Skip, HedrShift);
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GetVideo(Mode, Rate, Skip, true);
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}
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free (HasSync);
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HasSync = NULL;
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// Add thumbnail to iconview
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thumbbuf = gdk_pixbuf_scale_simple (pixbuf_rx, 100,
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100.0/ModeSpec[Mode].ImgWidth * ModeSpec[Mode].ImgHeight * ModeSpec[Mode].YScale, GDK_INTERP_HYPER);
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gdk_threads_enter ();
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gtk_list_store_prepend (savedstore, &iter);
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gtk_list_store_set (savedstore, &iter, 0, thumbbuf, 1, id, -1);
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gdk_threads_leave ();
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if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON(gui.tog_save))) {
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pngfilename = g_string_new(g_key_file_get_string(keyfile,"slowrx","rxdir",NULL));
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g_string_append_printf(pngfilename, "/%s_%s.png", timestr, ModeSpec[Mode].ShortName);
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printf(" Saving to %s\n", pngfilename->str);
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gdk_threads_enter ();
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gtk_statusbar_push (GTK_STATUSBAR(gui.statusbar), 0, "Saving..." );
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gdk_threads_leave ();
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setVU(0,-100);
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/*ensure_dir_exists("rx-lum");
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LumFile = fopen(lumfilename,"w");
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if (LumFile == NULL)
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perror("Unable to open luma file for writing");
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fwrite(StoredLum,1,(ModeSpec[Mode].LineLen * ModeSpec[Mode].ImgHeight) * 44100,LumFile);
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fclose(LumFile);*/
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// Save the received image as PNG
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GdkPixbuf *scaledpb;
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scaledpb = gdk_pixbuf_scale_simple (pixbuf_rx, ModeSpec[Mode].ImgWidth,
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ModeSpec[Mode].ImgHeight * ModeSpec[Mode].YScale, GDK_INTERP_HYPER);
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ensure_dir_exists(g_key_file_get_string(keyfile,"slowrx","rxdir",NULL));
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gdk_pixbuf_savev(scaledpb, pngfilename->str, "png", NULL, NULL, NULL);
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g_object_unref(scaledpb);
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g_string_free(pngfilename, true);
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}
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free(StoredLum);
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StoredLum = NULL;
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}
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}
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/*
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* main
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*/
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int main(int argc, char *argv[]) {
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FILE *ConfFile;
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const gchar *confdir;
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GString *confpath;
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gchar *confdata;
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gsize *keylen=NULL;
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gtk_init (&argc, &argv);
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gdk_threads_init ();
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// Load config
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confdir = g_get_user_config_dir();
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confpath = g_string_new(confdir);
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g_string_append(confpath, "/slowrx.ini");
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keyfile = g_key_file_new();
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if (g_key_file_load_from_file(keyfile, confpath->str, G_KEY_FILE_KEEP_COMMENTS, NULL)) {
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} else {
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printf("No valid config file found\n");
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g_key_file_load_from_data(keyfile, "[slowrx]\ndevice=default", -1, G_KEY_FILE_NONE, NULL);
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}
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createGUI();
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populateDeviceList();
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gtk_main();
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// Save config on exit
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ConfFile = fopen(confpath->str,"w");
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if (ConfFile == NULL) {
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perror("Unable to open config file for writing");
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}
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confdata = g_key_file_to_data(keyfile,keylen,NULL);
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fprintf(ConfFile,"%s",confdata);
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fwrite(confdata,1,(size_t)keylen,ConfFile);
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fclose(ConfFile);
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g_object_unref(pixbuf_rx);
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free(StoredLum);
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return (EXIT_SUCCESS);
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}
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