Remove std:: prefixes from C functions in webrtc/.

std::memcpy -> memcpy for instance. This change was motivated by a
compile report complaining that std::rand() was used instead of rand(),
probably with a stdlib.h include instead of cstdlib. Use of C functions
without the std:: prefix is a lot more common, so removing std:: to
address this.

BUG=
R=tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/9549004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5658 4adac7df-926f-26a2-2b94-8c16560cd09d

4 files changed, 9 insertions, 8 deletions

diff --git a/modules/video_coding/codecs/test/packet_manipulator.cc b/modules/video_coding/codecs/test/packet_manipulator.cc
index 0583e9ef..f4ca92a9 100644
--- a/modules/video_coding/codecs/test/packet_manipulator.cc
+++ b/modules/video_coding/codecs/test/packet_manipulator.cc
@@ -90,7 +90,7 @@ inline double PacketManipulatorImpl::RandomUniform() {
   // get the same behavior as long as we're using a fixed initial seed.
   critsect_->Enter();
   srand(random_seed_);
-  random_seed_ = std::rand();
+  random_seed_ = rand();
   critsect_->Leave();
   return (random_seed_ + 1.0)/(RAND_MAX + 1.0);
 }
diff --git a/modules/video_coding/codecs/test_framework/test.h b/modules/video_coding/codecs/test_framework/test.h
index 890d0cb5..7558abe6 100644
--- a/modules/video_coding/codecs/test_framework/test.h
+++ b/modules/video_coding/codecs/test_framework/test.h
@@ -41,7 +41,7 @@ protected:
     virtual void Teardown();
     double ActualBitRate(int nFrames);
     virtual bool PacketLoss(double lossRate, int /*thrown*/);
-    static double RandUniform() { return (std::rand() + 1.0)/(RAND_MAX + 1.0); }
+    static double RandUniform() { return (rand() + 1.0)/(RAND_MAX + 1.0); }
     static void VideoEncodedBufferToEncodedImage(
         webrtc::VideoFrame& videoBuffer,
         webrtc::EncodedImage &image);
diff --git a/modules/video_coding/main/test/jitter_estimate_test.h b/modules/video_coding/main/test/jitter_estimate_test.h
index 9318a491..dd349b2e 100644
--- a/modules/video_coding/main/test/jitter_estimate_test.h
+++ b/modules/video_coding/main/test/jitter_estimate_test.h
@@ -17,7 +17,7 @@
 #include <stdlib.h>
 #include <math.h>
 
-double const pi = 4*std::atan(1.0);
+double const pi = 4 * atan(1.0);
 
 class GaussDist
 {
@@ -26,9 +26,10 @@ public:
 
     double RandValue() // returns a single normally distributed number
     {
-        double r1 = (std::rand() + 1.0)/(RAND_MAX + 1.0); // gives equal distribution in (0, 1]
-        double r2 = (std::rand() + 1.0)/(RAND_MAX + 1.0);
-        return _mu + _sigma * sqrt(-2*std::log(r1))*std::cos(2*pi*r2);
+        double r1 = (rand() + 1.0) /
+                    (RAND_MAX + 1.0);  // gives equal distribution in (0, 1]
+        double r2 = (rand() + 1.0) / (RAND_MAX + 1.0);
+        return _mu + _sigma * sqrt(-2 * log(r1)) * cos(2 * pi * r2);
     }
 
     double GetAverage()
@@ -86,7 +87,7 @@ public:
     void SetLossRate(double rate);
 
 private:
-    double RandUniform() { return (std::rand() + 1.0)/(RAND_MAX + 1.0); }
+    double RandUniform() { return (rand() + 1.0)/(RAND_MAX + 1.0); }
     unsigned int _frameRate;
     unsigned int _capacity;
     unsigned int _rate;
diff --git a/modules/video_coding/main/test/test_callbacks.cc b/modules/video_coding/main/test/test_callbacks.cc
index 8e967763..710a06ea 100644
--- a/modules/video_coding/main/test/test_callbacks.cc
+++ b/modules/video_coding/main/test/test_callbacks.cc
@@ -406,7 +406,7 @@ RTPSendCompleteCallback::PacketLoss()
 bool
 RTPSendCompleteCallback::UnifomLoss(double lossPct)
 {
-    double randVal = (std::rand() + 1.0)/(RAND_MAX + 1.0);
+    double randVal = (rand() + 1.0) / (RAND_MAX + 1.0);
     return randVal < lossPct/100;
 }