API changes, most recent first:
+2020-08-21 - xxxxxxxxxx - lavu 56.58.100 - avstring.h
+ Deprecate av_d2str(). Use av_asprintf() instead.
+
+2020-08-04 - xxxxxxxxxx - lavu 56.58.100 - channel_layout.h
+ Add AV_CH_LAYOUT_22POINT2 together with its newly required pieces:
+ AV_CH_TOP_SIDE_LEFT, AV_CH_TOP_SIDE_RIGHT, AV_CH_BOTTOM_FRONT_CENTER,
+ AV_CH_BOTTOM_FRONT_LEFT, AV_CH_BOTTOM_FRONT_RIGHT.
+
+2020-07-xx - xxxxxxxxxx - lavu 56.57.100 - cpu.h
+ Add AV_CPU_FLAG_MMI and AV_CPU_FLAG_MSA.
+
+2020-07-xx - xxxxxxxxxx - lavu 56.56.100 - imgutils.h
+ Add av_image_fill_plane_sizes().
+
+2020-07-xx - xxxxxxxxxx - lavc 58.96.100 - packet.h
+ Add AV_PKT_DATA_S12M_TIMECODE.
+
2020-06-12 - b09fb030c1 - lavu 56.55.100 - pixdesc.h
Add AV_PIX_FMT_X2RGB10.