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SDR: Display spectrum graph together with channel numbers and position

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This commit is contained in:
Andreas Eversberg
2017-09-02 15:41:11 +02:00
parent 496aff5a79
commit 9205767f94
4 changed files with 40 additions and 5 deletions
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36
src/common/display_spectrum.c
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@@ -33,10 +33,11 @@ static char screen[HEIGHT][MAX_DISPLAY_WIDTH];
static uint8_t screen_color[HEIGHT][MAX_DISPLAY_WIDTH];
static int spectrum_on = 0;
static double db = 100;
static double center_frequency, frequency_range;
static dispspectrum_t disp;
void display_spectrum_init(int samplerate)
void display_spectrum_init(int samplerate, double _center_frequency)
{
memset(&disp, 0, sizeof(disp));
disp.interval_max = (double)samplerate * DISPLAY_INTERVAL + 0.5;
@@ -44,6 +45,9 @@ void display_spectrum_init(int samplerate)
if (disp.interval_max < MAX_DISPLAY_SPECTRUM - 1)
disp.interval_max = MAX_DISPLAY_SPECTRUM - 1;
memset(buffer_max, 0, sizeof(buffer_max));
center_frequency = _center_frequency;
frequency_range = (double)samplerate;
}
void display_spectrum_on(int on)
@@ -90,6 +94,8 @@ void display_spectrum_limit_scroll(int on)
*/
void display_spectrum(float *samples, int length)
{
sender_t *sender;
char print_channel[32], print_frequency[32];
int width, h;
int pos, max;
double *buffer_I, *buffer_Q;
@@ -213,6 +219,34 @@ void display_spectrum(float *samples, int length)
}
}
}
for (sender = sender_head; sender; sender = sender->next) {
j = (int)((sender->empfangsfrequenz - center_frequency) / frequency_range * (double) fft_size + width / 2 + 0.5);
if (j < 0 || j >= width) /* check out-of-range, should not happen */
continue;
for (k = 0; k < HEIGHT; k++) {
/* skip yellow graph */
if (screen_color[k][j] == 13)
continue;
screen[k][j] = ':';
screen_color[k][j] = 12;
}
sprintf(print_channel, "Ch%d", sender->kanal);
for (o = 0; o < (int)strlen(print_channel); o++) {
s = j - strlen(print_channel) + o;
if (s >= 0 && s < width) {
screen[HEIGHT - 1][s] = print_channel[o];
screen_color[HEIGHT - 1][s] = 7;
}
}
sprintf(print_frequency, "%.4f", sender->empfangsfrequenz / 1e6);
for (o = 0; o < (int)strlen(print_frequency); o++) {
s = j + o + 1;
if (s >= 0 && s < width) {
screen[HEIGHT - 1][s] = print_frequency[o];
screen_color[HEIGHT - 1][s] = 7;
}
}
}
printf("\0337\033[H");
for (j = 0; j < HEIGHT; j++) {
for (k = 0; k < width; k++) {