Low-bandwidth audio testing

webrtc/test/fake_audio_device.h

Index: webrtc/test/fake_audio_device.h
diff --git a/webrtc/test/fake_audio_device.h b/webrtc/test/fake_audio_device.h
index e44ec540f0f36221624bf457ef11324d60d52f82..f6017443d7c0300c74f73ad5031ae12d0fd1b48b 100644
--- a/webrtc/test/fake_audio_device.h
+++ b/webrtc/test/fake_audio_device.h
@@ -89,6 +89,12 @@ class FakeAudioDevice : public FakeAudioDeviceModule {
   static std::unique_ptr<Renderer> CreateWavFileWriter(
       std::string filename, int sampling_frequency_in_hz);
 
+  // Returns a Renderer instance that writes its data to a WAV file, cutting
+  // off silence at the beginning (not necessarily perfect silence, see
+  // kAmplitudeThreshold) and at the end (only actual 0 samples in this case).
+  static std::unique_ptr<Renderer> CreateBoundedWavFileWriter(
+      std::string filename, int sampling_frequency_in_hz);
+
   // Returns a Renderer instance that does nothing with the audio data.
   static std::unique_ptr<Renderer> CreateDiscardRenderer(
       int sampling_frequency_in_hz);