Implement timing frames.

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 d45abcd1b6e64e94d40429c6304a196394c7a140..bbfe732e973edd4e16529b4bb4cbd039c75d3346 100644
--- a/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
@@ -165,7 +165,8 @@ VP8EncoderImpl::VP8EncoderImpl()
       cpu_speed_default_(-6),
       number_of_cores_(0),
       rc_max_intra_target_(0),
-      key_frame_request_(kMaxSimulcastStreams, false) {
+      key_frame_request_(kMaxSimulcastStreams, false),
+      last_timing_frame_time_ms_(0) {
   Random random(rtc::TimeMicros());
   picture_id_.reserve(kMaxSimulcastStreams);
   for (int i = 0; i < kMaxSimulcastStreams; ++i) {
@@ -668,6 +669,8 @@ int VP8EncoderImpl::Encode(const VideoFrame& frame,
   if (encoded_complete_callback_ == NULL)
     return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
 
+  int64_t encode_start_ms = rtc::TimeMillis();
+
   rtc::scoped_refptr<VideoFrameBuffer> input_image = frame.video_frame_buffer();
   // Since we are extracting raw pointers from |input_image| to
   // |raw_images_[0]|, the resolution of these frames must match.
@@ -789,7 +792,7 @@ int VP8EncoderImpl::Encode(const VideoFrame& frame,
     return WEBRTC_VIDEO_CODEC_ERROR;
   timestamp_ += duration;
   // Examines frame timestamps only.
-  return GetEncodedPartitions(tl_configs, frame);
+  return GetEncodedPartitions(tl_configs, frame, encode_start_ms);
 }
 
 void VP8EncoderImpl::PopulateCodecSpecific(
@@ -815,10 +818,17 @@ void VP8EncoderImpl::PopulateCodecSpecific(
 
 int VP8EncoderImpl::GetEncodedPartitions(
     const TemporalLayers::FrameConfig tl_configs[],
-    const VideoFrame& input_image) {
+    const VideoFrame& input_image,
+    int64_t encode_start_ms) {
   int bw_resolutions_disabled =
       (encoders_.size() > 1) ? NumStreamsDisabled(send_stream_) : -1;
 
+  bool is_time_for_timing_frame =
+      input_image.render_time_ms() - last_timing_frame_time_ms_ >=
+      codec_.timingFramesDelayMs;
+  if (is_time_for_timing_frame)
+    last_timing_frame_time_ms_ = input_image.render_time_ms();
+
   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();
@@ -878,6 +888,16 @@ int VP8EncoderImpl::GetEncodedPartitions(
         (codec_.mode == kScreensharing) ? VideoContentType::SCREENSHARE
                                         : VideoContentType::UNSPECIFIED;
 
+    if (is_time_for_timing_frame ||
+        encoded_images_[encoder_idx]._length >=
+            codec_.minFrameSizeToForceTimingFrameBytes) {
+      encoded_images_[encoder_idx].timing_.is_timing_frame = true;
+      encoded_images_[encoder_idx].timing_.encode_start_ms = encode_start_ms;
+      encoded_images_[encoder_idx].timing_.encode_finish_ms = rtc::TimeMillis();
+    } else {
+      encoded_images_[encoder_idx].timing_.is_timing_frame = false;
+    }
+
     int qp = -1;
     vpx_codec_control(&encoders_[encoder_idx], VP8E_GET_LAST_QUANTIZER_64, &qp);
     temporal_layers_[stream_idx]->FrameEncoded(