diff options
Diffstat (limited to 'src/pulse')
| -rw-r--r-- | src/pulse/channelmap.c | 19 | ||||
| -rw-r--r-- | src/pulse/channelmap.h | 3 |
2 files changed, 22 insertions, 0 deletions
diff --git a/src/pulse/channelmap.c b/src/pulse/channelmap.c index fd313bd3..26eae599 100644 --- a/src/pulse/channelmap.c +++ b/src/pulse/channelmap.c @@ -577,3 +577,22 @@ int pa_channel_map_compatible(const pa_channel_map *map, const pa_sample_spec *s return map->channels == ss->channels; } + +int pa_channel_map_superset(const pa_channel_map *a, const pa_channel_map *b) { + pa_bool_t in_a[PA_CHANNEL_POSITION_MAX]; + unsigned i; + + pa_assert(a); + pa_assert(b); + + memset(in_a, 0, sizeof(in_a)); + + for (i = 0; i < a->channels; i++) + in_a[a->map[i]] = TRUE; + + for (i = 0; i < b->channels; i++) + if (!in_a[b->map[i]]) + return 0; + + return 1; +} diff --git a/src/pulse/channelmap.h b/src/pulse/channelmap.h index d7d19d79..a6c044f1 100644 --- a/src/pulse/channelmap.h +++ b/src/pulse/channelmap.h @@ -227,6 +227,9 @@ int pa_channel_map_valid(const pa_channel_map *map) PA_GCC_PURE; * the specified sample spec. \since 0.9.12 */ int pa_channel_map_compatible(const pa_channel_map *map, const pa_sample_spec *ss) PA_GCC_PURE; +/** Returns non-zero if every channel defined in b is also defined in a. \since 0.9.15 */ +int pa_channel_map_superset(const pa_channel_map *a, const pa_channel_map *b) PA_GCC_PURE; + PA_C_DECL_END #endif |