Reduce the runtime of some ACM tests in modules_tests

webrtc/modules/audio_coding/test/EncodeDecodeTest.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include "webrtc/modules/audio_coding/test/EncodeDecodeTest.h"
 
 #include <sstream>
 #include <stdio.h>
 #include <stdlib.h>
 
 #include "testing/gtest/include/gtest/gtest.h"
+#include "webrtc/base/checks.h"
 #include "webrtc/base/scoped_ptr.h"
 #include "webrtc/common_types.h"
 #include "webrtc/modules/audio_coding/include/audio_coding_module.h"
 #include "webrtc/modules/audio_coding/acm2/acm_common_defs.h"
 #include "webrtc/modules/audio_coding/test/utility.h"
 #include "webrtc/system_wrappers/include/trace.h"
 #include "webrtc/test/testsupport/fileutils.h"
 
 namespace webrtc {
 
@@ skipping 28 matching lines @@
   struct CodecInst sendCodec;
   int noOfCodecs = acm->NumberOfCodecs();
   int codecNo;
 
   // Open input file
   const std::string file_name = webrtc::test::ResourcePath(in_file_name, "pcm");
   _pcmFile.Open(file_name, sample_rate, "rb");
   if (channels == 2) {
     _pcmFile.ReadStereo(true);
   }
+  static const int kTestLengthMs = 500;

[ivoc, 2015/12/10 12:23:57]

Not sure what the point of static is here.

[hlundin-webrtc, 2015/12/10 12:49:59]

Gone.

+  const int test_length_blocks = rtc::CheckedDivExact(kTestLengthMs, 10);
+  _pcmFile.SetNum10MsBlocksToRead(test_length_blocks);
+  // Fast-forward 1 second (100 blocks) since the file starts with silence.
+  _pcmFile.FastForward(100);
 
   // Set the codec for the current test.
   if ((testMode == 0) || (testMode == 1)) {
     // Set the codec id.
     codecNo = codeId;
   } else {
     // Choose codec on command line.
     printf("List of supported codec.\n");
     for (int n = 0; n < noOfCodecs; n++) {
       EXPECT_EQ(0, acm->Codec(n, &sendCodec));
@@ skipping 266 matching lines @@
   if (acm->SendCodec()) {
     _sender.Run();
   }
   _sender.Teardown();
   rtpFile.Close();
 
   return fileName;
 }
 
 }  // namespace webrtc