Make the nonlinear beamformer steerable

webrtc/modules/audio_processing/include/audio_processing.h

Index: webrtc/modules/audio_processing/include/audio_processing.h
diff --git a/webrtc/modules/audio_processing/include/audio_processing.h b/webrtc/modules/audio_processing/include/audio_processing.h
index 318b2f89533652b6fd1ad896d269f78deb0d004d..60520162085c6a3e7487a813373743297effd55c 100644
--- a/webrtc/modules/audio_processing/include/audio_processing.h
+++ b/webrtc/modules/audio_processing/include/audio_processing.h
@@ -109,12 +109,19 @@ struct ExperimentalNs {
 struct Beamforming {
   Beamforming()
       : enabled(false),
-        array_geometry() {}
+        array_geometry(),
+        target_angle_radians(M_PI / 2.f) {}

[The Sun (google.com), 2015/10/13 07:20:21]

Use C++11 initialization?

[aluebs-webrtc, 2015/10/20 00:04:20]

I am not sure what you are suggesting. What am I missing?

   Beamforming(bool enabled, const std::vector<Point>& array_geometry)
+      : Beamforming(enabled, array_geometry, M_PI / 2.f) {}
+  Beamforming(bool enabled,
+              const std::vector<Point>& array_geometry,
+              float target_angle_radians)
       : enabled(enabled),
-        array_geometry(array_geometry) {}
+        array_geometry(array_geometry),
+        target_angle_radians(target_angle_radians) {}
   const bool enabled;
   const std::vector<Point> array_geometry;
+  const float target_angle_radians;

[Andrew MacDonald, 2015/10/14 22:12:31]

We don't have any immediate use for exposing this in the AudioProcessing
interface. Should we hold off?

I suppose you want to be able to test it in audioproc_float, which is
justification enough :)

[aluebs-webrtc, 2015/10/20 00:04:20]

Yes, I only surfaced it here to test it in audioproc_float. But if you think it
doesn't make sense I can hold off with that.

[Andrew MacDonald, 2015/10/20 03:00:08]

I think it's probably worth it.

[aluebs-webrtc, 2015/10/21 01:41:40]

Agreed.

 };
 
 // Use to enable intelligibility enhancer in audio processing. Must be provided