From 22f1fce330059ef8a383cf327a023d6a9da5ad3e Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Mon, 15 Feb 2016 02:44:20 +0100
Subject: Include toolame-dab as library

---
 libtoolame-dab/utils.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 libtoolame-dab/utils.c

(limited to 'libtoolame-dab/utils.c')

diff --git a/libtoolame-dab/utils.c b/libtoolame-dab/utils.c
new file mode 100644
index 0000000..a9aefbe
--- /dev/null
+++ b/libtoolame-dab/utils.c
@@ -0,0 +1,33 @@
+#include "utils.h"
+#include <unistd.h>
+#include <stdint.h>
+#include <math.h>
+
+/* 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];
+
+}
+
-- 
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