StringForRate()

Introduce a function to generate the string representation of a bitrate
(kbps, mbps, gbps, etc..)

* Factor out the code from MediaPlayer InfoWindow
* Allow different bases (/1000 or /1024)

headers/private/shared/StringForRate.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2010 Haiku Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef STRING_FOR_RATE_H
+#define STRING_FOR_RATE_H
+
+#include <SupportDefs.h>
+
+
+namespace BPrivate {
+
+
+const char* string_for_rate(double rate, char* string, size_t stringSize,
+	double base = 1024.0f);
+
+
+}	// namespace BPrivate
+
+
+using BPrivate::string_for_rate;
+
+
+#endif // COLOR_QUANTIZER_H

src/apps/mediaplayer/InfoWin.cpp

@@ -32,6 +32,7 @@
 #include <Mime.h>
 #include <NodeInfo.h>
 #include <String.h>
+#include <StringForRate.h>
 #include <StringView.h>
 #include <TextView.h>
 
@@ -407,14 +408,10 @@ printf("InfoWin::Update(0x%08lx)\n", which);
 		}
 		if (format.type == B_MEDIA_ENCODED_AUDIO) {
 			float br = format.u.encoded_audio.bit_rate;
-			if (br > 0.0) {
-				char rateString[20];
-				snprintf(rateString, sizeof(rateString), B_TRANSLATE(", %.0f kbps"),
-					br / 1000);
-				s << rateString;
-			}
+			char string[20] = "";
+			if (br > 0.0)
+				s << ", " << string_for_rate(br, string, 20, 1000.0);
 		}
-
 		s << "\n\n";
 		fContentsView->Insert(s.String());
 	}

src/kits/shared/Jamfile

@@ -29,6 +29,7 @@ StaticLibrary libshared.a :
 	RWLockManager.cpp
 	SHA256.cpp
 	ShakeTrackingFilter.cpp
+	StringForRate.cpp
 	StringForSize.cpp
 	Variant.cpp
 ;

src/kits/shared/StringForRate.cpp

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2012 Haiku Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+#include "StringForRate.h"
+
+#include <stdio.h>
+
+#include <SystemCatalog.h>
+
+using BPrivate::gSystemCatalog;
+
+
+#undef B_TRANSLATION_CONTEXT
+#define B_TRANSLATION_CONTEXT "StringForRate"
+
+
+namespace BPrivate {
+
+
+const char*
+string_for_rate(double rate, char* string, size_t stringSize, double base)
+{
+	double kbps = rate / base;
+	if (kbps < 1.0) {
+		const char* trKey = B_TRANSLATE_MARK("%.0f bps");
+		snprintf(string, stringSize, gSystemCatalog.GetString(trKey,
+			B_TRANSLATION_CONTEXT), (int)rate);
+		return string;
+	}
+	double mbps = kbps / base;
+	if (mbps < 1.0) {
+		const char* trKey = B_TRANSLATE_MARK("%.0f kbps");
+		snprintf(string, stringSize, gSystemCatalog.GetString(trKey,
+			B_TRANSLATION_CONTEXT), kbps);
+		return string;
+	}
+	double gbps = mbps / base;
+	if (gbps < 1.0) {
+		const char* trKey = B_TRANSLATE_MARK("%.0f mbps");
+		snprintf(string, stringSize, gSystemCatalog.GetString(trKey,
+			B_TRANSLATION_CONTEXT), mbps);
+		return string;
+	}
+	double tbps = gbps / base;
+	if (tbps < 1.0) {
+		const char* trKey = B_TRANSLATE_MARK("%.0f gbps");
+		snprintf(string, stringSize, gSystemCatalog.GetString(trKey,
+			B_TRANSLATION_CONTEXT), gbps);
+		return string;
+	}
+	const char* trKey = B_TRANSLATE_MARK("%.0f tbps");
+	snprintf(string, stringSize, gSystemCatalog.GetString(trKey,
+		B_TRANSLATION_CONTEXT), tbps);
+	return string;
+}
+
+
+}	// namespace BPrivate
+