Use backticks not vertical bars to denote variables in comments

Bug: webrtc:12338
Change-Id: I89c8b3a328d04203177522cbdfd9e606fd4bce4c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/228246
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34696}
diff --git a/modules/video_coding/codecs/h264/h264_decoder_impl.cc b/modules/video_coding/codecs/h264/h264_decoder_impl.cc
index e696987..11d36b7 100644
--- a/modules/video_coding/codecs/h264/h264_decoder_impl.cc
+++ b/modules/video_coding/codecs/h264/h264_decoder_impl.cc
@@ -80,9 +80,9 @@
   RTC_CHECK(context->pix_fmt == kPixelFormatDefault ||
             context->pix_fmt == kPixelFormatFullRange);
 
-  // |av_frame->width| and |av_frame->height| are set by FFmpeg. These are the
-  // actual image's dimensions and may be different from |context->width| and
-  // |context->coded_width| due to reordering.
+  // `av_frame->width` and `av_frame->height` are set by FFmpeg. These are the
+  // actual image's dimensions and may be different from `context->width` and
+  // `context->coded_width` due to reordering.
   int width = av_frame->width;
   int height = av_frame->height;
   // See `lowres`, if used the decoder scales the image by 1/2^(lowres). This
@@ -201,7 +201,7 @@
   av_context_->extradata = nullptr;
   av_context_->extradata_size = 0;
 
-  // If this is ever increased, look at |av_context_->thread_safe_callbacks| and
+  // If this is ever increased, look at `av_context_->thread_safe_callbacks` and
   // make it possible to disable the thread checker in the frame buffer pool.
   av_context_->thread_count = 1;
   av_context_->thread_type = FF_THREAD_SLICE;
diff --git a/modules/video_coding/codecs/h264/h264_decoder_impl.h b/modules/video_coding/codecs/h264/h264_decoder_impl.h
index 6ba4eb7..2c90a40 100644
--- a/modules/video_coding/codecs/h264/h264_decoder_impl.h
+++ b/modules/video_coding/codecs/h264/h264_decoder_impl.h
@@ -61,7 +61,7 @@
   ~H264DecoderImpl() override;
 
   // If `codec_settings` is NULL it is ignored. If it is not NULL,
-  // |codec_settings->codecType| must be `kVideoCodecH264`.
+  // `codec_settings->codecType` must be `kVideoCodecH264`.
   int32_t InitDecode(const VideoCodec* codec_settings,
                      int32_t number_of_cores) override;
   int32_t Release() override;
diff --git a/modules/video_coding/codecs/h264/h264_encoder_impl.cc b/modules/video_coding/codecs/h264/h264_encoder_impl.cc
index 4e78d1e..887aa58 100644
--- a/modules/video_coding/codecs/h264/h264_encoder_impl.cc
+++ b/modules/video_coding/codecs/h264/h264_encoder_impl.cc
@@ -89,13 +89,13 @@
 
 // Helper method used by H264EncoderImpl::Encode.
 // Copies the encoded bytes from `info` to `encoded_image`. The
-// |encoded_image->_buffer| may be deleted and reallocated if a bigger buffer is
+// `encoded_image->_buffer` may be deleted and reallocated if a bigger buffer is
 // required.
 //
 // After OpenH264 encoding, the encoded bytes are stored in `info` spread out
 // over a number of layers and "NAL units". Each NAL unit is a fragment starting
 // with the four-byte start code {0,0,0,1}. All of this data (including the
-// start codes) is copied to the |encoded_image->_buffer|.
+// start codes) is copied to the `encoded_image->_buffer`.
 static void RtpFragmentize(EncodedImage* encoded_image, SFrameBSInfo* info) {
   // Calculate minimum buffer size required to hold encoded data.
   size_t required_capacity = 0;
@@ -115,7 +115,7 @@
   encoded_image->SetEncodedData(buffer);
 
   // Iterate layers and NAL units, note each NAL unit as a fragment and copy
-  // the data to |encoded_image->_buffer|.
+  // the data to `encoded_image->_buffer`.
   const uint8_t start_code[4] = {0, 0, 0, 1};
   size_t frag = 0;
   encoded_image->set_size(0);
@@ -489,7 +489,7 @@
     RtpFragmentize(&encoded_images_[i], &info);
 
     // Encoder can skip frames to save bandwidth in which case
-    // |encoded_images_[i]._length| == 0.
+    // `encoded_images_[i]._length` == 0.
     if (encoded_images_[i].size() > 0) {
       // Parse QP.
       h264_bitstream_parser_.ParseBitstream(encoded_images_[i]);
diff --git a/modules/video_coding/codecs/h264/h264_encoder_impl.h b/modules/video_coding/codecs/h264/h264_encoder_impl.h
index b96de10..1163464 100644
--- a/modules/video_coding/codecs/h264/h264_encoder_impl.h
+++ b/modules/video_coding/codecs/h264/h264_encoder_impl.h
@@ -57,7 +57,7 @@
   explicit H264EncoderImpl(const cricket::VideoCodec& codec);
   ~H264EncoderImpl() override;
 
-  // |settings.max_payload_size| is ignored.
+  // `settings.max_payload_size` is ignored.
   // The following members of `codec_settings` are used. The rest are ignored.
   // - codecType (must be kVideoCodecH264)
   // - targetBitrate
diff --git a/modules/video_coding/codecs/vp8/libvpx_vp8_encoder.cc b/modules/video_coding/codecs/vp8/libvpx_vp8_encoder.cc
index 712a833..1f70569 100644
--- a/modules/video_coding/codecs/vp8/libvpx_vp8_encoder.cc
+++ b/modules/video_coding/codecs/vp8/libvpx_vp8_encoder.cc
@@ -1049,7 +1049,7 @@
           error == WEBRTC_VIDEO_CODEC_TARGET_BITRATE_OVERSHOOT)) {
     ++num_tries;
     // Note we must pass 0 for `flags` field in encode call below since they are
-    // set above in |libvpx_interface_->vpx_codec_control_| function for each
+    // set above in `libvpx_interface_->vpx_codec_control_` function for each
     // encoder/spatial layer.
     error = libvpx_->codec_encode(&encoders_[0], &raw_images_[0], timestamp_,
                                   duration, 0, VPX_DL_REALTIME);
diff --git a/modules/video_coding/codecs/vp9/libvpx_vp9_decoder.cc b/modules/video_coding/codecs/vp9/libvpx_vp9_decoder.cc
index 8d8cb95..0f8ade3 100644
--- a/modules/video_coding/codecs/vp9/libvpx_vp9_decoder.cc
+++ b/modules/video_coding/codecs/vp9/libvpx_vp9_decoder.cc
@@ -247,7 +247,7 @@
                        VPX_DL_REALTIME)) {
     return WEBRTC_VIDEO_CODEC_ERROR;
   }
-  // |img->fb_priv| contains the image data, a reference counted Vp9FrameBuffer.
+  // `img->fb_priv` contains the image data, a reference counted Vp9FrameBuffer.
   // It may be released by libvpx during future vpx_codec_decode or
   // vpx_codec_destroy calls.
   img = vpx_codec_get_frame(decoder_, &iter);
diff --git a/modules/video_coding/codecs/vp9/libvpx_vp9_encoder.h b/modules/video_coding/codecs/vp9/libvpx_vp9_encoder.h
index 7c87d58..826e8d6 100644
--- a/modules/video_coding/codecs/vp9/libvpx_vp9_encoder.h
+++ b/modules/video_coding/codecs/vp9/libvpx_vp9_encoder.h
@@ -226,7 +226,7 @@
   // Performance flags, ordered by `min_pixel_count`.
   const PerformanceFlags performance_flags_;
   // Caching of of `speed_configs_`, where index i maps to the resolution as
-  // specified in |codec_.spatialLayer[i]|.
+  // specified in `codec_.spatialLayer[i]`.
   std::vector<PerformanceFlags::ParameterSet>
       performance_flags_by_spatial_index_;
   void UpdatePerformanceFlags();
diff --git a/modules/video_coding/session_info.h b/modules/video_coding/session_info.h
index dc27a64..846352a 100644
--- a/modules/video_coding/session_info.h
+++ b/modules/video_coding/session_info.h
@@ -79,7 +79,7 @@
   void InformOfEmptyPacket(uint16_t seq_num);
 
   // Finds the packet of the beginning of the next VP8 partition. If
-  // none is found the returned iterator points to |packets_.end()|.
+  // none is found the returned iterator points to `packets_.end()`.
   // `it` is expected to point to the last packet of the previous partition,
   // or to the first packet of the frame. `packets_skipped` is incremented
   // for each packet found which doesn't have the beginning bit set.