[WTF] Add a multiplication operator (and a few others) to MediaTime

https://bugs.webkit.org/show_bug.cgi?id=123137

Reviewed by Eric Carlson.

Source/WTF:

Add a multiplication operator and an inequality operator to the
MediaTime class for use by MSE.

* wtf/MediaTime.cpp:
(WTF::signum): Moved to top of file.
(WTF::MediaTime::operator*): Added.
(WTF::MediaTime::operator!=): Added.
* wtf/MediaTime.h:
(WTF::operator*): Added non-class version of operator*.

Tools:

Add tests for new MediaTime operators.

* TestWebKitAPI/Tests/WTF/MediaTime.cpp:
(TestWebKitAPI::TEST):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@157992 268f45cc-cd09-0410-ab3c-d52691b4dbfc

diff --git a/Source/WTF/ChangeLog b/Source/WTF/ChangeLog
index b3c57db..716ab3a 100644 (file)
--- a/Source/WTF/ChangeLog
+++ b/Source/WTF/ChangeLog
@@ -1,3 +1,20 @@
+2013-10-25  Jer Noble  <jer.noble@apple.com>
+
+        [WTF] Add a multiplication operator (and a few others) to MediaTime
+        https://bugs.webkit.org/show_bug.cgi?id=123137
+
+        Reviewed by Eric Carlson.
+
+        Add a multiplication operator and an inequality operator to the
+        MediaTime class for use by MSE.
+
+        * wtf/MediaTime.cpp:
+        (WTF::signum): Moved to top of file.
+        (WTF::MediaTime::operator*): Added.
+        (WTF::MediaTime::operator!=): Added.
+        * wtf/MediaTime.h:
+        (WTF::operator*): Added non-class version of operator*.
+
 2013-10-24  Jer Noble  <jer.noble@apple.com>
 
         [Mac] Add helper methods to convert CMTime <--> MediaTime

diff --git a/Source/WTF/wtf/MediaTime.cpp b/Source/WTF/wtf/MediaTime.cpp
index 4b2eee8..5821123 100644 (file)
--- a/Source/WTF/wtf/MediaTime.cpp
+++ b/Source/WTF/wtf/MediaTime.cpp
@@ -54,6 +54,11 @@ static int32_t leastCommonMultiple(int32_t a, int32_t b, int32_t &result)
     return safeMultiply(a, b / greatestCommonDivisor(a, b), result);
 }
 
+static int32_t signum(int64_t val)
+{
+    return (0 < val) - (val < 0);
+}
+
 const int32_t MediaTime::MaximumTimeScale = 0x7fffffffL;
 
 MediaTime::MediaTime()
@@ -215,6 +220,40 @@ MediaTime MediaTime::operator-(const MediaTime& rhs) const
     return a;
 }
 
+MediaTime MediaTime::operator*(int32_t rhs) const
+{
+    if (isInvalid())
+        return invalidTime();
+
+    if (isIndefinite())
+        return indefiniteTime();
+
+    if (!rhs)
+        return zeroTime();
+
+    if (isPositiveInfinite()) {
+        if (rhs > 0)
+            return positiveInfiniteTime();
+        return negativeInfiniteTime();
+    }
+
+    if (isNegativeInfinite()) {
+        if (rhs > 0)
+            return negativeInfiniteTime();
+        return positiveInfiniteTime();
+    }
+
+    MediaTime a = *this;
+
+    while (!safeMultiply(a.m_timeValue, rhs, a.m_timeValue)) {
+        if (a.m_timeScale == 1)
+            return signum(a.m_timeValue) == signum(rhs) ? positiveInfiniteTime() : negativeInfiniteTime();
+        a.setTimeScale(a.m_timeScale / 2);
+    }
+
+    return a;
+}
+
 bool MediaTime::operator<(const MediaTime& rhs) const
 {
     return compare(rhs) == LessThan;
@@ -225,6 +264,11 @@ bool MediaTime::operator>(const MediaTime& rhs) const
     return compare(rhs) == GreaterThan;
 }
 
+bool MediaTime::operator!=(const MediaTime& rhs) const
+{
+    return compare(rhs) != EqualTo;
+}
+
 bool MediaTime::operator==(const MediaTime& rhs) const
 {
     return compare(rhs) == EqualTo;
@@ -332,11 +376,6 @@ void MediaTime::setTimeScale(int32_t timeScale)
     m_timeScale = timeScale;
 }
 
-static int32_t signum(int64_t val)
-{
-    return (0 < val) - (val < 0);
-}
-
 MediaTime abs(const MediaTime& rhs)
 {
     if (rhs.isInvalid())

diff --git a/Source/WTF/wtf/MediaTime.h b/Source/WTF/wtf/MediaTime.h
index 48af164..36764ad 100644 (file)
--- a/Source/WTF/wtf/MediaTime.h
+++ b/Source/WTF/wtf/MediaTime.h
@@ -26,8 +26,8 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef MediaTime_h
-#define MediaTime_h
+#ifndef WTF_MediaTime_h
+#define WTF_MediaTime_h
 
 #include <wtf/FastMalloc.h>
 
@@ -61,10 +61,14 @@ public:
     double toDouble() const;
 
     MediaTime& operator=(const MediaTime& rhs);
+    MediaTime& operator+=(const MediaTime& rhs) { return *this = *this + rhs; }
+    MediaTime& operator-=(const MediaTime& rhs) { return *this = *this - rhs; }
     MediaTime operator+(const MediaTime& rhs) const;
     MediaTime operator-(const MediaTime& rhs) const;
+    MediaTime operator*(int32_t) const;
     bool operator<(const MediaTime& rhs) const;
     bool operator>(const MediaTime& rhs) const;
+    bool operator!=(const MediaTime& rhs) const;
     bool operator==(const MediaTime& rhs) const;
     bool operator>=(const MediaTime& rhs) const;
     bool operator<=(const MediaTime& rhs) const;
@@ -105,6 +109,8 @@ private:
     uint32_t m_timeFlags;
 };
 
+inline MediaTime operator*(int32_t lhs, const MediaTime& rhs) { return rhs.operator*(lhs); }
+
 WTF_EXPORT_PRIVATE extern MediaTime abs(const MediaTime& rhs);
 }
 

diff --git a/Tools/ChangeLog b/Tools/ChangeLog
index 03cbb5e..662aa43 100644 (file)
--- a/Tools/ChangeLog
+++ b/Tools/ChangeLog
@@ -1,3 +1,15 @@
+2013-10-25  Jer Noble  <jer.noble@apple.com>
+
+        [WTF] Add a multiplication operator (and a few others) to MediaTime
+        https://bugs.webkit.org/show_bug.cgi?id=123137
+
+        Reviewed by Eric Carlson.
+
+        Add tests for new MediaTime operators.
+
+        * TestWebKitAPI/Tests/WTF/MediaTime.cpp:
+        (TestWebKitAPI::TEST):
+
 2013-10-24  Mark Rowe  <mrowe@apple.com>
 
         Remove references to OS X 10.7 from Xcode configuration settings.

diff --git a/Tools/TestWebKitAPI/Tests/WTF/MediaTime.cpp b/Tools/TestWebKitAPI/Tests/WTF/MediaTime.cpp
index d6d48fc..2dfcae8 100644 (file)
--- a/Tools/TestWebKitAPI/Tests/WTF/MediaTime.cpp
+++ b/Tools/TestWebKitAPI/Tests/WTF/MediaTime.cpp
@@ -71,12 +71,17 @@ TEST(WTF, MediaTime)
     EXPECT_EQ(MediaTime::negativeInfiniteTime() < MediaTime::positiveInfiniteTime(), true);
     EXPECT_EQ(MediaTime::negativeInfiniteTime() == MediaTime::negativeInfiniteTime(), true);
     EXPECT_EQ(MediaTime::positiveInfiniteTime() == MediaTime::positiveInfiniteTime(), true);
+    EXPECT_EQ(MediaTime::positiveInfiniteTime() != MediaTime::negativeInfiniteTime(), true);
     EXPECT_EQ(MediaTime::invalidTime() == MediaTime::invalidTime(), true);
+    EXPECT_EQ(MediaTime::invalidTime() != MediaTime::invalidTime(), false);
+    EXPECT_EQ(MediaTime::invalidTime() != MediaTime::zeroTime(), true);
     EXPECT_EQ(MediaTime::invalidTime() > MediaTime::negativeInfiniteTime(), true);
     EXPECT_EQ(MediaTime::invalidTime() > MediaTime::positiveInfiniteTime(), true);
     EXPECT_EQ(MediaTime::negativeInfiniteTime() < MediaTime::invalidTime(), true);
     EXPECT_EQ(MediaTime::positiveInfiniteTime() < MediaTime::invalidTime(), true);
     EXPECT_EQ(MediaTime::indefiniteTime() == MediaTime::indefiniteTime(), true);
+    EXPECT_EQ(MediaTime::indefiniteTime() != MediaTime::indefiniteTime(), false);
+    EXPECT_EQ(MediaTime::indefiniteTime() != MediaTime::zeroTime(), true);
     EXPECT_EQ(MediaTime::indefiniteTime() > MediaTime::negativeInfiniteTime(), true);
     EXPECT_EQ(MediaTime::indefiniteTime() < MediaTime::positiveInfiniteTime(), true);
     EXPECT_EQ(MediaTime::negativeInfiniteTime() < MediaTime::indefiniteTime(), true);
@@ -85,6 +90,7 @@ TEST(WTF, MediaTime)
     EXPECT_EQ(MediaTime::indefiniteTime() > MediaTime(1, 1), true);
     EXPECT_EQ(MediaTime(1, 1) < MediaTime(2, 1), true);
     EXPECT_EQ(MediaTime(2, 1) > MediaTime(1, 1), true);
+    EXPECT_EQ(MediaTime(1, 1) != MediaTime(2, 1), true);
     EXPECT_EQ(MediaTime(2, 1) == MediaTime(2, 1), true);
     EXPECT_EQ(MediaTime(2, 1) == MediaTime(4, 2), true);
 
@@ -122,6 +128,23 @@ TEST(WTF, MediaTime)
     EXPECT_EQ(MediaTime(1, 2) - MediaTime(1, 3), MediaTime(1, 6));
     EXPECT_EQ(MediaTime(2, numeric_limits<int32_t>::max()-1) - MediaTime(1, numeric_limits<int32_t>::max()-2), MediaTime(1, numeric_limits<int32_t>::max()));
 
+    // Multiplication Operators
+    EXPECT_EQ(MediaTime::positiveInfiniteTime(), MediaTime::positiveInfiniteTime() * 2);
+    EXPECT_EQ(MediaTime::negativeInfiniteTime(), MediaTime::negativeInfiniteTime() * 2);
+    EXPECT_EQ(MediaTime::negativeInfiniteTime(), MediaTime::positiveInfiniteTime() * -2);
+    EXPECT_EQ(MediaTime::positiveInfiniteTime(), MediaTime::negativeInfiniteTime() * -2);
+    EXPECT_EQ(MediaTime::invalidTime(), MediaTime::invalidTime() * 2);
+    EXPECT_EQ(MediaTime::invalidTime(), MediaTime::invalidTime() * -2);
+    EXPECT_EQ(MediaTime::indefiniteTime(), MediaTime::indefiniteTime() * 2);
+    EXPECT_EQ(MediaTime::indefiniteTime(), MediaTime::indefiniteTime() * -2);
+    EXPECT_EQ(MediaTime(6, 1), MediaTime(3, 1) * 2);
+    EXPECT_EQ(MediaTime(0, 1), MediaTime(0, 1) * 2);
+    EXPECT_EQ(MediaTime(int64_t(1) << 60, 1), MediaTime(int64_t(1) << 60, 2) * 2);
+    EXPECT_EQ(MediaTime::positiveInfiniteTime(), MediaTime(numeric_limits<int64_t>::max(), 1) * 2);
+    EXPECT_EQ(MediaTime::positiveInfiniteTime(), MediaTime(numeric_limits<int64_t>::min(), 1) * -2);
+    EXPECT_EQ(MediaTime::negativeInfiniteTime(), MediaTime(numeric_limits<int64_t>::max(), 1) * -2);
+    EXPECT_EQ(MediaTime::negativeInfiniteTime(), MediaTime(numeric_limits<int64_t>::min(), 1) * 2);
+
     // Constants
     EXPECT_EQ(MediaTime::zeroTime(), MediaTime(0, 1));
     EXPECT_EQ(MediaTime::invalidTime(), MediaTime(-1, 1, 0));