Adding test for SingleNalUnit mode

modules/video_coding/codecs/test/videoprocessor.cc

Index: modules/video_coding/codecs/test/videoprocessor.cc
diff --git a/modules/video_coding/codecs/test/videoprocessor.cc b/modules/video_coding/codecs/test/videoprocessor.cc
index af5b4b35b5e75465823f89dbf0aaa5416568db21..d2a5b5df4f6f19f2c8ef9bd23215935d7300f534 100644
--- a/modules/video_coding/codecs/test/videoprocessor.cc
+++ b/modules/video_coding/codecs/test/videoprocessor.cc
@@ -16,6 +16,7 @@
 #include <memory>
 #include <utility>
 #include <vector>
+#include <algorithm>

[brandtr, 2017/09/26 09:19:13]

Also sort the include order here.

[ssilkin, 2017/09/26 11:07:04]

Done.

 
 #include "api/video/i420_buffer.h"
 #include "common_types.h"  // NOLINT(build/include)
@@ -108,6 +109,22 @@ void VerifyQpParser(const EncodedImage& encoded_frame,
   EXPECT_EQ(encoded_frame.qp_, qp) << "Encoder QP != parsed bitstream QP.";
 }
 
+rtc::Optional<size_t> GetMaxNaluLength(const EncodedImage& encoded_frame,
+                        const TestConfig& config) {

[brandtr, 2017/09/26 09:19:13]

To fix the indentation, you can run 'git cl format' in the checkout directory.
That formats all the code that you have touched according to the Google C++
style guide.

[ssilkin, 2017/09/26 11:07:04]

Great. I didn't know about that command.

+  if (config.codec_settings.codecType != kVideoCodecH264)
+    return rtc::Optional<size_t>();
+
+  std::vector<webrtc::H264::NaluIndex> nalu_indices =
+    webrtc::H264::FindNaluIndices(encoded_frame._buffer,
+      encoded_frame._length);
+
+  size_t maxLength = 0;

[brandtr, 2017/09/26 09:19:13]

We typically use snake_case for naming local variables.

[ssilkin, 2017/09/26 11:07:04]

Done.

+  for (const webrtc::H264::NaluIndex& index : nalu_indices)
+    maxLength = std::max(maxLength, index.payload_size);
+
+  return rtc::Optional<size_t>(maxLength);
+}
+
 int GetElapsedTimeMicroseconds(int64_t start_ns, int64_t stop_ns) {
   int64_t diff_us = (stop_ns - start_ns) / rtc::kNumNanosecsPerMicrosec;
   RTC_DCHECK_GE(diff_us, std::numeric_limits<int>::min());
@@ -351,6 +368,8 @@ void VideoProcessor::FrameEncoded(webrtc::VideoCodecType codec,
       encoded_image._length / config_.networking_config.packet_size_in_bytes +
       1;
 
+  frame_stat->max_nalu_length = GetMaxNaluLength(encoded_image, config_);
+
   // Simulate packet loss.
   bool exclude_this_frame = false;
   if (encoded_image._frameType == kVideoFrameKey) {