Reduce the runtime of some ACM tests in modules_tests

webrtc/modules/audio_coding/test/TestAllCodecs.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/TestAllCodecs.h"
 
 #include <cstdio>
 #include <limits>
 #include <string>
 
 #include "testing/gtest/include/gtest/gtest.h"
 
+#include "webrtc/base/checks.h"
 #include "webrtc/common_types.h"
 #include "webrtc/engine_configurations.h"
 #include "webrtc/modules/audio_coding/include/audio_coding_module.h"
 #include "webrtc/modules/audio_coding/include/audio_coding_module_typedefs.h"
 #include "webrtc/modules/audio_coding/test/utility.h"
 #include "webrtc/system_wrappers/include/trace.h"
 #include "webrtc/test/testsupport/fileutils.h"
 #include "webrtc/typedefs.h"
 
 // Description of the test:
@@ skipping 386 matching lines @@
 }
 
 void TestAllCodecs::Run(TestPack* channel) {
   AudioFrame audio_frame;
 
   int32_t out_freq_hz = outfile_b_.SamplingFrequency();
   size_t receive_size;
   uint32_t timestamp_diff;
   channel->reset_payload_size();
   int error_count = 0;
+  int counter = 0;
+  static const int kTestLengthMs = 500;
+  const int test_length_blocks = rtc::CheckedDivExact(kTestLengthMs, 10);
+  infile_a_.SetNum10MsBlocksToRead(test_length_blocks);

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

You could consider hardcoding the number of blocks here as below, and explain in
a comment.

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

Done.

+  // Fast-forward 1 second (100 blocks) since the file starts with silence.
+  infile_a_.FastForward(100);
 
-  int counter = 0;
   while (!infile_a_.EndOfFile()) {
     // Add 10 msec to ACM.
     infile_a_.Read10MsData(audio_frame);
     CHECK_ERROR(acm_a_->Add10MsData(audio_frame));
 
     // Verify that the received packet size matches the settings.
     receive_size = channel->payload_size();
     if (receive_size) {
       if ((receive_size != packet_size_bytes_) &&
           (packet_size_bytes_ != kVariableSize)) {
@@ skipping 39 matching lines @@
 }
 
 void TestAllCodecs::DisplaySendReceiveCodec() {
   CodecInst my_codec_param;
   printf("%s -> ", acm_a_->SendCodec()->plname);
   acm_b_->ReceiveCodec(&my_codec_param);
   printf("%s\n", my_codec_param.plname);
 }
 
 }  // namespace webrtc