From ca5406108cb086f57222400a08fde34686ce1b3f Mon Sep 17 00:00:00 2001 From: "Matthias P. Braendli" Date: Fri, 25 Apr 2014 09:21:35 +0200 Subject: dabplus-enc-file: replace little dots by nice level indicator --- src/utils.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 src/utils.c (limited to 'src/utils.c') diff --git a/src/utils.c b/src/utils.c new file mode 100644 index 0000000..3b0bee4 --- /dev/null +++ b/src/utils.c @@ -0,0 +1,32 @@ +#include "utils.h" +#include +#include + +/* Taken from sox */ +const char* level(int channel, int* peak) +{ + static char const * const text[][2] = { + /* White: 2dB steps */ + {"", ""}, {"-", "-"}, {"=", "="}, {"-=", "=-"}, + {"==", "=="}, {"-==", "==-"}, {"===", "==="}, {"-===", "===-"}, + {"====", "===="}, {"-====", "====-"}, {"=====", "====="}, + {"-=====", "=====-"}, {"======", "======"}, + /* Red: 1dB steps */ + {"!=====", "=====!"}, + }; + int const red = 1, white = NUMOF(text) - red; + + double linear = (double)(*peak) / INT16_MAX; + + int vu_dB = linear ? floor(2 * white + red + linear_to_dB(linear)) : 0; + + int index = vu_dB < 2 * white ? + MAX(vu_dB / 2, 0) : + MIN(vu_dB - white, red + white - 1); + + *peak = 0; + + return text[index][channel]; + +} + -- cgit v1.2.3