Rewrote the PRNG using an xorshift* algorithm and moved the files from test/ to base/.

Created a simple unit test for the new random number generator. (It mostly tests
that the generated numbers are consistent with the intended distribution, e.g. uniform.
It is not a comprehensive test of the quality of the random numbers.)

Several assertions in OveruseDetectorTest seem to depend on the exact sequence of random numbers. I updated those numbers to work with the new PRNG.

Compute the standard deviation of the expected result in TestReorderFilter instead of passing an uncertainty parameter.

BUG=webrtc:5177

Review URL: https://codereview.webrtc.org/1457023002

Cr-Commit-Position: refs/heads/master@{#10965}

1 files changed, 4 insertions, 4 deletions

diff --git a/webrtc/modules/remote_bitrate_estimator/test/bwe_test_framework.h b/webrtc/modules/remote_bitrate_estimator/test/bwe_test_framework.h
index d94ee17951..f7c1d1f0bf 100644
--- a/webrtc/modules/remote_bitrate_estimator/test/bwe_test_framework.h
+++ b/webrtc/modules/remote_bitrate_estimator/test/bwe_test_framework.h
@@ -22,6 +22,7 @@
 #include <vector>
 
 #include "webrtc/base/common.h"
+#include "webrtc/base/random.h"
 #include "webrtc/base/scoped_ptr.h"
 #include "webrtc/modules/bitrate_controller/include/bitrate_controller.h"
 #include "webrtc/modules/include/module_common_types.h"
@@ -31,7 +32,6 @@
 #include "webrtc/modules/remote_bitrate_estimator/test/packet.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
 #include "webrtc/system_wrappers/include/clock.h"
-#include "webrtc/test/random.h"
 
 namespace webrtc {
 
@@ -265,7 +265,7 @@ class LossFilter : public PacketProcessor {
   virtual void RunFor(int64_t time_ms, Packets* in_out);
 
  private:
-  test::Random random_;
+  Random random_;
   float loss_fraction_;
 
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(LossFilter);
@@ -299,7 +299,7 @@ class JitterFilter : public PacketProcessor {
   int64_t MeanUs();
 
  private:
-  test::Random random_;
+  Random random_;
   int64_t stddev_jitter_us_;
   int64_t last_send_time_us_;
   bool reordering_;  // False by default.
@@ -318,7 +318,7 @@ class ReorderFilter : public PacketProcessor {
   virtual void RunFor(int64_t time_ms, Packets* in_out);
 
  private:
-  test::Random random_;
+  Random random_;
   float reorder_fraction_;
 
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(ReorderFilter);