Added more statistics during SSIM/PSNR calculation, including calculation of min/max value.

Moved video_metrics.h into a GYP library so it can be used from other projects.

Review URL: http://webrtc-codereview.appspot.com/132013

git-svn-id: http://webrtc.googlecode.com/svn/trunk@582 4adac7df-926f-26a2-2b94-8c16560cd09d

src/modules/video_coding/main/source/video_coding_test.gypi

@@ -8,10 +8,30 @@
 
 {
   'targets': [
+    {
+      'target_name': 'video_coding_test_lib',
+      'type': '<(library)',
+      'dependencies': [
+      ],
+      'include_dirs': [
+      ],
+      'direct_dependent_settings': {
+        'include_dirs': [
+          '../test',
+        ],
+      },
+      'sources': [
+        # headers
+        '../test/video_metrics.h',
+        # sources
+        '../test/video_metrics.cc',
+      ], 
+    },
     {
       'target_name': 'video_coding_test',
       'type': 'executable',
       'dependencies': [
+         'video_coding_test_lib',
          'webrtc_video_coding',
          'rtp_rtcp',
          'webrtc_utility',
@@ -39,7 +59,6 @@
         '../test/release_test.h',
         '../test/rtp_player.h',
         '../test/test_util.h',
-        '../test/video_metrics.h',
         '../test/video_source.h',
 
         # sources
@@ -56,7 +75,6 @@
         '../test/rtp_player.cc',
         '../test/test_util.cc',
         '../test/tester_main.cc',
-        '../test/video_metrics.cc',
         '../test/video_rtp_play_mt.cc',
         '../test/video_rtp_play.cc',
         '../test/video_source.cc',