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..36f4b3a99e2920ea7fcb7a02e85312c85ac376bc 100644
--- a/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
@@ -131,6 +131,14 @@ bool ValidSimulcastResolutions(const VideoCodec& codec, int num_streams) {
   }
   return true;
 }
+
+bool SendingAllStreams(std::vector<bool>& streams) {
+  for (bool stream : streams) {
+    if (!stream)
+      return false;
+  }
+  return true;

[stefan-webrtc, 2015/09/16 07:49:27]

I think you could replace this with return std::find(streams.begin(),
streams.end(), false) == streams.end();

+}
 }  // namespace
 
 const float kTl1MaxTimeToDropFrames = 20.0f;
@@ -944,6 +952,11 @@ void VP8EncoderImpl::PopulateCodecSpecific(
 
 int VP8EncoderImpl::GetEncodedPartitions(const VideoFrame& input_image,
                                          bool only_predicting_from_key_frame) {
+  bool bw_limited_resolution = false;
+  bool bw_limited_resolution_available = encoders_.size() > 1;
+  if (bw_limited_resolution_available)
+    bw_limited_resolution = !SendingAllStreams(send_stream_);

[stefan-webrtc, 2015/09/16 07:49:27]

Same reasoning as in the quality CL. Would it be useful to track how many
resolutions are disabled here?

[åsapersson, 2015/09/17 14:12:03]

Done.

+
   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 +1007,10 @@ 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_limited_resolution_available =
+        bw_limited_resolution_available;
+    encoded_images_[encoder_idx].adapt_reason_.bw_limited_resolution =
+        bw_limited_resolution;
 
     int qp = -1;
     vpx_codec_control(&encoders_[encoder_idx], VP8E_GET_LAST_QUANTIZER_64, &qp);