Index: media/capture/webm_muxer.h |
diff --git a/media/capture/webm_muxer.h b/media/capture/webm_muxer.h |
index 153e14fd942d995047e1c7c935f465b79cae42ee..3fec647fa9cc3e8aecb5a53220392e4541eb5376 100644 |
--- a/media/capture/webm_muxer.h |
+++ b/media/capture/webm_muxer.h |
@@ -27,8 +27,9 @@ class VideoFrame; |
// containing a single encoded video frame. WebM container has no Trailer. |
// Clients will push encoded VPx video frames one by one via the |
// OnEncodedVideo(). libwebm will eventually ping the WriteDataCB passed on |
-// contructor with the wrapped encoded data. All operations must happen in a |
-// single thread, where WebmMuxer is created and destroyed. |
+// contructor with the wrapped encoded data. |
+// WebmMuxer is created/destroyed on a thread, usually the Main Render thread, |
+// and receives OnEncodedVideo()s on another thread, usually Render IO. |
// [1] http://www.webmproject.org/docs/container/ |
// [2] http://www.matroska.org/technical/specs/index.html |
// TODO(mcasas): Add support for Audio muxing. |
@@ -56,8 +57,7 @@ class MEDIA_EXPORT WebmMuxer : public NON_EXPORTED_BASE(mkvmuxer::IMkvWriter) { |
// Creates and adds a new video track. Called upon receiving the first |
// frame of a given Track, adds |frame_size| and |frame_rate| to the Segment |
// info, although individual frames passed to OnEncodedVideo() can have any |
- // frame size. Returns OnEncodedVideo() callback with a |track_number| bound |
- // in the callback. |
+ // frame size. |
void AddVideoTrack(const gfx::Size& frame_size, double frame_rate); |
// IMkvWriter interface. |
@@ -68,7 +68,7 @@ class MEDIA_EXPORT WebmMuxer : public NON_EXPORTED_BASE(mkvmuxer::IMkvWriter) { |
void ElementStartNotify(mkvmuxer::uint64 element_id, |
mkvmuxer::int64 position) override; |
- // Used to DCHECK that we are called on the correct thread. |
+ // Used to DCHECK that we are called on the correct thread (usually IO) |
base::ThreadChecker thread_checker_; |
// A caller-side identifier to interact with |segment_|, initialised upon |