mapping is unknown NULL will be returned. \since 0.9.15 */
const char* pa_channel_map_to_pretty_name(const pa_channel_map *map) PA_GCC_PURE;
-/** Returns true if the specified channel position is available at
+/** Returns non-zero if the specified channel position is available at
* least once in the channel map. \since 0.9.16 */
int pa_channel_map_has_position(const pa_channel_map *map, pa_channel_position_t p) PA_GCC_PURE;
* \since 0.9.16 */
pa_volume_t pa_cvolume_min_mask(const pa_cvolume *a, const pa_channel_map *cm, pa_channel_position_mask_t mask) PA_GCC_PURE;
-/** Return true when the passed cvolume structure is valid, false otherwise */
+/** Return non-zero when the passed cvolume structure is valid */
int pa_cvolume_valid(const pa_cvolume *v) PA_GCC_PURE;
/** Return non-zero if the volume of all channels is equal to the specified value */