New FFmpeg public API headers to match our source tarball in deps.

third_party/ffmpeg/include/libavutil/pixfmt.h

Index: third_party/ffmpeg/include/libavutil/pixfmt.h
diff --git a/third_party/ffmpeg/include/libavutil/pixfmt.h b/third_party/ffmpeg/include/libavutil/pixfmt.h
index 21a72a8451789da6d698b4995cfc5cbcb279ca87..4995a4da196ab3a80fbe7e43f7508f258419d53d 100644
--- a/third_party/ffmpeg/include/libavutil/pixfmt.h
+++ b/third_party/ffmpeg/include/libavutil/pixfmt.h
@@ -116,6 +116,13 @@ enum PixelFormat {
     PIX_FMT_VAAPI_MOCO, ///< HW acceleration through VA API at motion compensation entry-point, Picture.data[3] contains a vaapi_render_state struct which contains macroblocks as well as various fields extracted from headers
     PIX_FMT_VAAPI_IDCT, ///< HW acceleration through VA API at IDCT entry-point, Picture.data[3] contains a vaapi_render_state struct which contains fields extracted from headers
     PIX_FMT_VAAPI_VLD,  ///< HW decoding through VA API, Picture.data[3] contains a vaapi_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
+
+    PIX_FMT_YUV420PLE,  ///< planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
+    PIX_FMT_YUV420PBE,  ///< planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
+    PIX_FMT_YUV422PLE,  ///< planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
+    PIX_FMT_YUV422PBE,  ///< planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
+    PIX_FMT_YUV444PLE,  ///< planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
+    PIX_FMT_YUV444PBE,  ///< planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
     PIX_FMT_NB,        ///< number of pixel formats, DO NOT USE THIS if you want to link with shared libav* because the number of formats might differ between versions
 };
 
@@ -137,4 +144,8 @@ enum PixelFormat {
 #define PIX_FMT_BGR565 PIX_FMT_NE(BGR565BE, BGR565LE)
 #define PIX_FMT_BGR555 PIX_FMT_NE(BGR555BE, BGR555LE)
 
+#define PIX_FMT_YUV420P16 PIX_FMT_NE(YUV420PBE, YUV420PLE)
+#define PIX_FMT_YUV422P16 PIX_FMT_NE(YUV422PBE, YUV422PLE)
+#define PIX_FMT_YUV444P16 PIX_FMT_NE(YUV444PBE, YUV444PLE)
+
 #endif /* AVUTIL_PIXFMT_H */