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Report timing frames info in GetStats.

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Some frames are already marked as 'timing frames' via video-timing RTP header extension. Timestamps along full WebRTC pipeline are gathered for these frames. This CL implements reporting of these timestamps for a single
timing frame since the last GetStats(). The frame with the longest end-to-end delay between two consecutive GetStats calls is reported.

The purpose of this timing information is not to provide a realtime statistics but to provide debugging information as it will help identify problematic places in video pipeline for outliers (frames which took longest to process).

BUG=webrtc:7594

Review-Url: https://codereview.webrtc.org/2946413002
Cr-Commit-Position: refs/heads/master@{#18909}
This commit is contained in:
ilnik
2017-07-06 03:06:50 -07:00
committed by Commit Bot
parent 5b7fc8ce42
commit 2edc6845ac
34 changed files with 376 additions and 67 deletions
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25
webrtc/modules/rtp_rtcp/source/rtp_header_extensions.cc
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@ -266,40 +266,41 @@ constexpr uint8_t VideoTimingExtension::kValueSizeBytes;
constexpr const char* VideoTimingExtension::kUri;
bool VideoTimingExtension::Parse(rtc::ArrayView<const uint8_t> data,
VideoTiming* timing) {
VideoSendTiming* timing) {
RTC_DCHECK(timing);
if (data.size() != kValueSizeBytes)
return false;
timing->encode_start_delta_ms =
ByteReader<uint16_t>::ReadBigEndian(data.data());
timing->encode_finish_delta_ms = ByteReader<uint16_t>::ReadBigEndian(
data.data() + 2 * VideoTiming::kEncodeFinishDeltaIdx);
data.data() + 2 * VideoSendTiming::kEncodeFinishDeltaIdx);
timing->packetization_finish_delta_ms = ByteReader<uint16_t>::ReadBigEndian(
data.data() + 2 * VideoTiming::kPacketizationFinishDeltaIdx);
data.data() + 2 * VideoSendTiming::kPacketizationFinishDeltaIdx);
timing->pacer_exit_delta_ms = ByteReader<uint16_t>::ReadBigEndian(
data.data() + 2 * VideoTiming::kPacerExitDeltaIdx);
data.data() + 2 * VideoSendTiming::kPacerExitDeltaIdx);
timing->network_timstamp_delta_ms = ByteReader<uint16_t>::ReadBigEndian(
data.data() + 2 * VideoTiming::kNetworkTimestampDeltaIdx);
data.data() + 2 * VideoSendTiming::kNetworkTimestampDeltaIdx);
timing->network2_timstamp_delta_ms = ByteReader<uint16_t>::ReadBigEndian(
data.data() + 2 * VideoTiming::kNetwork2TimestampDeltaIdx);
data.data() + 2 * VideoSendTiming::kNetwork2TimestampDeltaIdx);
timing->is_timing_frame = true;
return true;
}
bool VideoTimingExtension::Write(uint8_t* data, const VideoTiming& timing) {
bool VideoTimingExtension::Write(uint8_t* data, const VideoSendTiming& timing) {
ByteWriter<uint16_t>::WriteBigEndian(data, timing.encode_start_delta_ms);
ByteWriter<uint16_t>::WriteBigEndian(
data + 2 * VideoTiming::kEncodeFinishDeltaIdx,
data + 2 * VideoSendTiming::kEncodeFinishDeltaIdx,
timing.encode_finish_delta_ms);
ByteWriter<uint16_t>::WriteBigEndian(
data + 2 * VideoTiming::kPacketizationFinishDeltaIdx,
data + 2 * VideoSendTiming::kPacketizationFinishDeltaIdx,
timing.packetization_finish_delta_ms);
ByteWriter<uint16_t>::WriteBigEndian(
data + 2 * VideoTiming::kPacerExitDeltaIdx, timing.pacer_exit_delta_ms);
data + 2 * VideoSendTiming::kPacerExitDeltaIdx,
timing.pacer_exit_delta_ms);
ByteWriter<uint16_t>::WriteBigEndian(
data + 2 * VideoTiming::kNetworkTimestampDeltaIdx, 0); // reserved
data + 2 * VideoSendTiming::kNetworkTimestampDeltaIdx, 0); // reserved
ByteWriter<uint16_t>::WriteBigEndian(
data + 2 * VideoTiming::kNetwork2TimestampDeltaIdx, 0); // reserved
data + 2 * VideoSendTiming::kNetwork2TimestampDeltaIdx, 0); // reserved
return true;
}