Fix the build for older macOS.

[dcpomatic.git] / src / lib / ffmpeg_examiner.cc

diff --git a/src/lib/ffmpeg_examiner.cc b/src/lib/ffmpeg_examiner.cc
index bd6a9b20d475b6b23a7781a735bf52f09b19281e..0a236d836be46b4f5baacdee175201e154de6cab 100644 (file)
--- a/src/lib/ffmpeg_examiner.cc
+++ b/src/lib/ffmpeg_examiner.cc
@@ -33,8 +33,9 @@ extern "C" {
 #include <libavformat/avformat.h>
 #include <libavutil/pixfmt.h>
 #include <libavutil/pixdesc.h>
-#include <libavutil/eval.h>
+#include <libavutil/channel_layout.h>
 #include <libavutil/display.h>
+#include <libavutil/eval.h>
 }
 DCPOMATIC_ENABLE_WARNINGS
 #include <iostream>
@@ -479,3 +480,12 @@ FFmpegExaminer::range () const
                return VideoRange::FULL;
        }
 }
+
+
+PixelQuanta
+FFmpegExaminer::pixel_quanta () const
+{
+       auto const desc = av_pix_fmt_desc_get(video_codec_context()->pix_fmt);
+       return { 1 << desc->log2_chroma_w, 1 << desc->log2_chroma_h };
+}
+