Add histogram for percentage of sent frames that are limited in resolution due to bandwidth.

webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc

Index: webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
diff --git a/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc b/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
index 3b6df7550fcc3fa7deb127c8f0172f9d6703ef67..ab31b00609461b1d48c7543d6cfd7bb3180a62ab 100644
--- a/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
@@ -131,6 +131,15 @@ bool ValidSimulcastResolutions(const VideoCodec& codec, int num_streams) {
   }
   return true;
 }
+
+int NumStreamsDisabled(std::vector<bool>& streams) {
+  int num_disabled = 0;
+  for (bool stream : streams) {
+    if (!stream)
+      ++num_disabled;
+  }
+  return num_disabled;
+}
 }  // namespace
 
 const float kTl1MaxTimeToDropFrames = 20.0f;
@@ -944,6 +953,11 @@ void VP8EncoderImpl::PopulateCodecSpecific(
 
 int VP8EncoderImpl::GetEncodedPartitions(const VideoFrame& input_image,
                                          bool only_predicting_from_key_frame) {
+  int bw_resolutions_disabled = 0;
+  bool bw_available = encoders_.size() > 1;
+  if (bw_available)

[pbos-webrtc, 2015/09/28 15:34:38]

int bw_resolutions_disabled = bw_available ? NumStreamsDisabled(send_stream_) :
0;

If you want to.

[åsapersson, 2015/09/28 15:47:39]

Done.

+    bw_resolutions_disabled = NumStreamsDisabled(send_stream_);
+
   int stream_idx = static_cast<int>(encoders_.size()) - 1;
   int result = WEBRTC_VIDEO_CODEC_OK;
   for (size_t encoder_idx = 0; encoder_idx < encoders_.size();
@@ -994,6 +1008,9 @@ int VP8EncoderImpl::GetEncodedPartitions(const VideoFrame& input_image,
     encoded_images_[encoder_idx]._timeStamp = input_image.timestamp();
     encoded_images_[encoder_idx].capture_time_ms_ =
         input_image.render_time_ms();
+    encoded_images_[encoder_idx].adapt_reason_.bw_available = bw_available;
+    encoded_images_[encoder_idx].adapt_reason_.bw_resolutions_disabled =
+        bw_resolutions_disabled;
 
     int qp = -1;
     vpx_codec_control(&encoders_[encoder_idx], VP8E_GET_LAST_QUANTIZER_64, &qp);