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channelmap: add pa_channel_map_has_position()

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This commit is contained in:
Lennart Poettering 2009-05-08 22:45:24 +02:00
parent 44e566ade8
commit a714861cc1
2 changed files with 17 additions and 0 deletions
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13
src/pulse/channelmap.c
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@ -839,3 +839,16 @@ const char* pa_channel_map_to_pretty_name(const pa_channel_map *map) {
return NULL;
}
int pa_channel_map_has_position(const pa_channel_map *map, pa_channel_position_t p) {
unsigned c;
pa_return_val_if_fail(pa_channel_map_valid(map), 0);
pa_return_val_if_fail(p < PA_CHANNEL_POSITION_MAX, 0);
for (c = 0; c < map->channels; c++)
if (map->map[c] == p)
return 1;
return 0;
}

4
src/pulse/channelmap.h
View file

@ -325,6 +325,10 @@ mapping. I.e. "Stereo", "Surround 7.1" and so on. If the channel
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
* 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;
PA_C_DECL_END
#endif