default: return 0;
}
}
+
+int av_get_channel_layout_channel_index(uint64_t channel_layout,
+ uint64_t channel)
+{
+ if (!(channel_layout & channel) ||
+ av_get_channel_layout_nb_channels(channel) != 1)
+ return AVERROR(EINVAL);
+ channel_layout &= channel - 1;
+ return av_get_channel_layout_nb_channels(channel_layout);
+}
uint64_t av_get_default_channel_layout(int nb_channels);
/**
+ * Get the index of a channel in channel_layout.
+ *
+ * @param channel a channel layout describing exactly one channel which must be
+ * present in channel_layout.
+ *
+ * @return index of channel in channel_layout on success, a negative AVERROR
+ * on error.
+ */
+int av_get_channel_layout_channel_index(uint64_t channel_layout,
+ uint64_t channel);
+
+/**
* @}
*/