diff options
| author | Andreas Eversberg <jolly@eversberg.eu> | 2019-05-30 21:08:23 +0200 |
|---|---|---|
| committer | Andreas Eversberg <jolly@eversberg.eu> | 2019-05-30 21:08:23 +0200 |
| commit | 4362c78f38fdd9de21a20c662e4e022e3b400543 (patch) | |
| tree | 53c591e678d02cec64896727ecb8ee90f4670028 /src/libdisplay | |
| parent | 831b68401a4e2e6f7e1b8b1e9d9c1b834a6da988 (diff) | |
SDR: Display DC line (center frequency) in the spectrum view
Diffstat (limited to 'src/libdisplay')
| -rw-r--r-- | src/libdisplay/display_spectrum.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/libdisplay/display_spectrum.c b/src/libdisplay/display_spectrum.c index 4da35d9..3fcba3c 100644 --- a/src/libdisplay/display_spectrum.c +++ b/src/libdisplay/display_spectrum.c @@ -368,6 +368,22 @@ void display_spectrum(float *samples, int length) } } } + /* add center (DC line) to spectrum */ + j = width / 2 + 0.5; + if (j < 1 || j >= width-1) /* check out-of-range, should not happen */ + continue; + for (k = 0; k < HEIGHT; k++) { + /* skip green/yellow/white graph */ + if (screen_color[k][j] == 13 || screen_color[k][j] == 17 || screen_color[k][j] == 12) + continue; + screen[k][j] = '.'; + screen_color[k][j] = 7; + } + screen[0][j-1] = 'D'; + screen[0][j+1] = 'C'; + screen_color[0][j-1] = 7; + screen_color[0][j+1] = 7; + /* display buffer */ printf("\0337\033[H"); for (j = 0; j < HEIGHT; j++) { for (k = 0; k < width; k++) { |