X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fvideo_examiner.h;h=dd5d08c9e75341773265f7fa94d3bc1af5a9355c;hb=dd9f4f7e9511f8f830ec05d1b60c475c6b2d71e0;hp=1ff16a704f233f5cddf27e7f6b826f7b1300e1df;hpb=3828baf56467224f5d44049bf1e7a7ed11f43a05;p=dcpomatic.git

diff --git a/src/lib/video_examiner.h b/src/lib/video_examiner.h
index 1ff16a704..dd5d08c9e 100644
--- a/src/lib/video_examiner.h
+++ b/src/lib/video_examiner.h
@@ -33,11 +33,19 @@ class VideoExaminer
 {
 public:
 	virtual ~VideoExaminer () {}
+
+	virtual bool has_video () const = 0;
+
+	/** @return video frame rate (if known); must not be called if has_video() == false */
 	virtual boost::optional<double> video_frame_rate () const = 0;
+	/** @return video size; must not be called if has_video() == false */
 	virtual dcp::Size video_size () const = 0;
+	/** @return video length in frames; must not be called if has_video() == false */
 	virtual Frame video_length () const = 0;
+	/** @return video sample aspect ratio (if known); must not be called if has_video() == false */
 	virtual boost::optional<double> sample_aspect_ratio () const {
 		return boost::optional<double> ();
 	}
+	/** @return true if this video is in YUV; must not be called if has_video() == false */
 	virtual bool yuv () const = 0;
 };