/**
* Return a channel layout id that matches name, 0 if no match.
+ * name can be one or several of the following notations,
+ * separated by '+' or '|':
+ * - the name of an usual channel layout (mono, stereo, 4.0, quad, 5.0,
+ * 5.0(side), 5.1, 5.1(side), 7.1, 7.1(wide), downmix);
+ * - the name of a single channel (FL, FR, FC, LFE, BL, BR, FLC, FRC, BC,
+ * SL, SR, TC, TFL, TFC, TFR, TBL, TBC, TBR, DL, DR);
+ * - a number of channels, in decimal, optionnally followed by 'c', yielding
+ * the default channel layout for that number of channels (@see
+ * av_get_default_channel_layout);
+ * - a channel layout mask, in hexadecimal starting with "0x" (see the
+ * AV_CH_* macros).
+ + Example: "stereo+FC" = "2+FC" = "2c+1c" = "0x7"
*/
int64_t av_get_channel_layout(const char *name);
*/
int av_get_channel_layout_nb_channels(int64_t channel_layout);
+/**
+ * Return default channel layout for a given number of channels.
+ */
+int64_t av_get_default_channel_layout(int nb_channels);
+
#endif /* AVUTIL_AUDIOCONVERT_H */