Extend Size class

* Compute resolution
* Get abbreviation, eg. 1080p

CMakeLists.txt

@@ -111,6 +111,7 @@ set(SRC_FILES
     flac/flacmetadata.cpp
     flac/flacstream.cpp
     signature.cpp
+    size.cpp
     statusprovider.cpp
     tag.cpp
     tagtarget.cpp

size.cpp

@@ -0,0 +1,31 @@
+#include "./size.h"
+
+namespace Media {
+
+/*!
+ * \brief Returns an abbreviation for the current instance, eg. 720p for sizes greather than 1280×720
+ *        and 1080p for sizes greather than 1920×1080.
+ */
+const char *Size::abbreviation() const
+{
+    if(*this >= Size(7680, 4320)) {
+        return "8k";
+    } else if(*this >= Size(3840, 2160)) {
+        return "4k";
+    } else if(*this >= Size(1920, 1080)) {
+        return "1080p";
+    } else if(*this >= Size(1280, 720)) {
+        return "720p";
+    } else if(*this >= Size(704, 576)) {
+        return "576p";
+    } else if(*this >= Size(640, 480)) {
+        return "480p";
+    } else if(*this >= Size(480, 320)) {
+        return "320p";
+    } else if(*this >= Size(320, 240)) {
+        return "240p";
+    }
+    return "<240p";
+}
+
+}

size.h

@@ -23,9 +23,12 @@ public:
     constexpr uint32 height() const;
     void setWidth(uint32 value);
     void setHeight(uint32 value);
+    constexpr uint32 resolution() const;
+    const char *abbreviation() const;
 
     bool constexpr isNull() const;
     bool constexpr operator==(const Size &other) const;
+    bool constexpr operator>=(const Size &other) const;
     std::string toString() const;
 
 private:
@@ -81,6 +84,14 @@ inline void Size::setHeight(uint32 value)
     m_height = value;
 }
 
+/*!
+ * \brief Returns the resolution of the current instance (product of with and height).
+ */
+constexpr uint32 Size::resolution() const
+{
+    return m_width * m_height;
+}
+
 /*!
  * \brief Returns an indication whether both the width and height is 0.
  */
@@ -97,6 +108,15 @@ constexpr bool Size::operator==(const Size &other) const
     return (m_width == other.m_width) && (m_height == other.m_height);
 }
 
+/*!
+ * \brief Returns whether this instance is greather than \a other.
+ * \remarks Both dimensions must be greather. This operator does *not* take the resolution() into account.
+ */
+constexpr bool Size::operator>=(const Size &other) const
+{
+    return (m_width >= other.m_width) && (m_height >= other.m_height);
+}
+
 /*!
  * \brief Returns the string representation of the current size.
  */