avutil/channel_layout: add a 9.1.4 channel layout

Mapping to ITU-R BS.2051-3 "Sound System G" and ITU-R BS.1196-8 "Channel
Configuration 20".
Signed-off-by: James Almer <jamrial@gmail.com>

doc/utils.texi

@@ -729,6 +729,8 @@ FL+FR+FC+LFE+BL+BR+SL+SR+TFL+TFR
 FL+FR+FC+LFE+BL+BR+SL+SR+TFL+TFR+TBL+TBR
 @item 7.2.3
 FL+FR+FC+LFE+BL+BR+SL+SR+TFL+TFR+TBC+LFE2
+@item 9.1.4
+FL+FR+FC+LFE+BL+BR+FLC+FRC+SL+SR+TFL+TFR+TBL+TBR
 @item hexadecagonal
 FL+FR+FC+BL+BR+BC+SL+SR+WL+WR+TBL+TBR+TBC+TFC+TFL+TFR
 @item downmix

libavutil/channel_layout.c

@@ -208,6 +208,7 @@ static const struct channel_layout_name channel_layout_map[] = {
     { "7.1.2",          AV_CHANNEL_LAYOUT_7POINT1POINT2       },
     { "7.1.4",          AV_CHANNEL_LAYOUT_7POINT1POINT4_BACK  },
     { "7.2.3",          AV_CHANNEL_LAYOUT_7POINT2POINT3       },
+    { "9.1.4",          AV_CHANNEL_LAYOUT_9POINT1POINT4_BACK  },
     { "hexadecagonal",  AV_CHANNEL_LAYOUT_HEXADECAGONAL       },
     { "downmix",        AV_CHANNEL_LAYOUT_STEREO_DOWNMIX,     },
     { "22.2",           AV_CHANNEL_LAYOUT_22POINT2,           },

libavutil/channel_layout.h

@@ -240,6 +240,7 @@ enum AVChannelOrder {
 #define AV_CH_LAYOUT_7POINT1POINT2     (AV_CH_LAYOUT_7POINT1|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
 #define AV_CH_LAYOUT_7POINT1POINT4_BACK (AV_CH_LAYOUT_7POINT1POINT2|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT)
 #define AV_CH_LAYOUT_7POINT2POINT3     (AV_CH_LAYOUT_7POINT1POINT2|AV_CH_TOP_BACK_CENTER|AV_CH_LOW_FREQUENCY_2)
+#define AV_CH_LAYOUT_9POINT1POINT4_BACK (AV_CH_LAYOUT_7POINT1POINT4_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
 #define AV_CH_LAYOUT_HEXADECAGONAL     (AV_CH_LAYOUT_OCTAGONAL|AV_CH_WIDE_LEFT|AV_CH_WIDE_RIGHT|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT|AV_CH_TOP_BACK_CENTER|AV_CH_TOP_FRONT_CENTER|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
 #define AV_CH_LAYOUT_STEREO_DOWNMIX    (AV_CH_STEREO_LEFT|AV_CH_STEREO_RIGHT)
 #define AV_CH_LAYOUT_22POINT2          (AV_CH_LAYOUT_7POINT1POINT4_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER|AV_CH_BACK_CENTER|AV_CH_LOW_FREQUENCY_2|AV_CH_TOP_FRONT_CENTER|AV_CH_TOP_CENTER|AV_CH_TOP_SIDE_LEFT|AV_CH_TOP_SIDE_RIGHT|AV_CH_TOP_BACK_CENTER|AV_CH_BOTTOM_FRONT_CENTER|AV_CH_BOTTOM_FRONT_LEFT|AV_CH_BOTTOM_FRONT_RIGHT)
@@ -413,6 +414,7 @@ typedef struct AVChannelLayout {
 #define AV_CHANNEL_LAYOUT_7POINT1POINT2     AV_CHANNEL_LAYOUT_MASK(10, AV_CH_LAYOUT_7POINT1POINT2)
 #define AV_CHANNEL_LAYOUT_7POINT1POINT4_BACK AV_CHANNEL_LAYOUT_MASK(12, AV_CH_LAYOUT_7POINT1POINT4_BACK)
 #define AV_CHANNEL_LAYOUT_7POINT2POINT3     AV_CHANNEL_LAYOUT_MASK(12, AV_CH_LAYOUT_7POINT2POINT3)
+#define AV_CHANNEL_LAYOUT_9POINT1POINT4_BACK AV_CHANNEL_LAYOUT_MASK(14, AV_CH_LAYOUT_9POINT1POINT4_BACK)
 #define AV_CHANNEL_LAYOUT_HEXADECAGONAL     AV_CHANNEL_LAYOUT_MASK(16, AV_CH_LAYOUT_HEXADECAGONAL)
 #define AV_CHANNEL_LAYOUT_STEREO_DOWNMIX    AV_CHANNEL_LAYOUT_MASK(2,  AV_CH_LAYOUT_STEREO_DOWNMIX)
 #define AV_CHANNEL_LAYOUT_22POINT2          AV_CHANNEL_LAYOUT_MASK(24, AV_CH_LAYOUT_22POINT2)

tests/ref/fate/channel_layout

@@ -32,6 +32,7 @@ cube           FL+FR+BL+BR+TFL+TFR+TBL+TBR
 7.1.2          FL+FR+FC+LFE+BL+BR+SL+SR+TFL+TFR
 7.1.4          FL+FR+FC+LFE+BL+BR+SL+SR+TFL+TFR+TBL+TBR
 7.2.3          FL+FR+FC+LFE+BL+BR+SL+SR+TFL+TFR+TBC+LFE2
+9.1.4          FL+FR+FC+LFE+BL+BR+FLC+FRC+SL+SR+TFL+TFR+TBL+TBR
 hexadecagonal  FL+FR+FC+BL+BR+BC+SL+SR+TFL+TFC+TFR+TBL+TBC+TBR+WL+WR
 downmix        DL+DR
 22.2           FL+FR+FC+LFE+BL+BR+FLC+FRC+BC+SL+SR+TC+TFL+TFC+TFR+TBL+TBC+TBR+LFE2+TSL+TSR+BFC+BFL+BFR