avutil/channel_layout: add 22.2 layout

Requires some extraneous top side and bottom front channels to be
defined.

According to STD-B59v2, the defined channel layout is:
- FL
- FR
- FC
- LFE1
- BL
- BR
- FLc
- FRc
- BC
- LFE2
- SiL
- SiR
- TpFL
- TpFR
- TpFC
- TpC
- TpBL
- TpBR
- TpSiL
- TpSiR
- TpBC
- BtFC
- BtFL
- BtFR

1 files changed, 6 insertions, 0 deletions

diff --git a/libavutil/channel_layout.c b/libavutil/channel_layout.c
index 3bd5ee29b7..ac773a9e63 100644
--- a/libavutil/channel_layout.c
+++ b/libavutil/channel_layout.c
@@ -62,6 +62,11 @@ static const struct channel_name channel_names[] = {
     [33] = { "SDL",       "surround direct left"  },
     [34] = { "SDR",       "surround direct right" },
     [35] = { "LFE2",      "low frequency 2"       },
+    [36] = { "TSL",       "top side left"         },
+    [37] = { "TSR",       "top side right"        },
+    [38] = { "BFC",       "bottom front center"   },
+    [39] = { "BFL",       "bottom front left"     },
+    [40] = { "BFR",       "bottom front right"    },
 };
 
 static const char *get_channel_name(int channel_id)
@@ -104,6 +109,7 @@ static const struct {
     { "octagonal",   8,  AV_CH_LAYOUT_OCTAGONAL },
     { "hexadecagonal", 16, AV_CH_LAYOUT_HEXADECAGONAL },
     { "downmix",     2,  AV_CH_LAYOUT_STEREO_DOWNMIX, },
+    { "22.2",          24, AV_CH_LAYOUT_22POINT2, },
 };
 
 static uint64_t get_channel_layout_single(const char *name, int name_len)