Replaced the data logging functionality in the AEC with a generic logging functionality

webrtc/modules/audio_processing/logging/apm_data_dumper.cc

Index: webrtc/modules/audio_processing/logging/apm_data_dumper.cc
diff --git a/webrtc/modules/audio_processing/logging/apm_data_dumper.cc b/webrtc/modules/audio_processing/logging/apm_data_dumper.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7fb889169043a643012dc9054509c0db1d5a116c
--- /dev/null
+++ b/webrtc/modules/audio_processing/logging/apm_data_dumper.cc
@@ -0,0 +1,66 @@
+/*
+ *  Copyright (c) 2016 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_processing/logging/apm_data_dumper.h"
+
+#include <sstream>
+
+#include "webrtc/base/stringutils.h"
+
+// Check to verify that the define is properly set.
+#if !defined(WEBRTC_AEC_DEBUG_DUMP) || \
+    (WEBRTC_AEC_DEBUG_DUMP != 0 && WEBRTC_AEC_DEBUG_DUMP != 1)
+#error "Set WEBRTC_AEC_DEBUG_DUMP to either 0 or 1"
+#endif
+
+namespace webrtc {
+
+namespace {
+
+#if WEBRTC_AEC_DEBUG_DUMP == 1
+std::string FormFileName(const char* name,
+                         int instance_index,
+                         int reinit_index,
+                         const std::string& suffix) {
+  std::stringstream ss;
+  ss << name << "_" << instance_index << "-" << reinit_index << suffix;
+  return ss.str();
+}
+#endif
+
+}  // namespace
+
+#if WEBRTC_AEC_DEBUG_DUMP == 1
+FILE* ApmDataDumper::GetRawFile(const char* name) {
+  std::string filename =
+      FormFileName(name, instance_index_, recording_set_index_, ".dat");
+  auto search = raw_files_.find(filename);
+  if (search == raw_files_.end()) {
+    raw_files_[filename].reset(fopen(filename.c_str(), "wb"));
+  }
+  return raw_files_[filename].get();

[kwiberg-webrtc, 2016/05/03 09:02:50]

You do 2-3 map lookups here. Try something like

  auto& f = raw_files_[filename];
  if (!f) {
    f.reset(fopen(filename.c_str(), "wb"));
  }
  return f.get();

This assumes that all map values are non-null, but that's the case, right?

[peah-webrtc, 2016/05/03 11:24:40]

Awesome suggestion! Yes, they are all non-null.
Done.

+}
+
+WavWriter* ApmDataDumper::GetWavFile(const char* name,
+                                     int sample_rate_hz,
+                                     int num_channels) {
+  std::string filename =
+      FormFileName(name, instance_index_, recording_set_index_, ".wav");
+  auto search = wav_files_.find(filename);
+  if (search == wav_files_.end()) {
+    wav_files_[filename].reset(
+        new WavWriter(filename.c_str(), sample_rate_hz, num_channels));
+  }
+  return wav_files_[filename].get();

[kwiberg-webrtc, 2016/05/03 09:02:50]

Same here.

[peah-webrtc, 2016/05/03 11:24:40]

Done.

+}
+
+#endif
+
+}  // namespace webrtc