+
+int pa_channel_map_compatible(const pa_channel_map *map, const pa_sample_spec *ss) {
+ pa_assert(map);
+ pa_assert(ss);
+
+ pa_return_val_if_fail(pa_channel_map_valid(map), 0);
+ pa_return_val_if_fail(pa_sample_spec_valid(ss), 0);
+
+ return map->channels == ss->channels;
+}
+
+int pa_channel_map_superset(const pa_channel_map *a, const pa_channel_map *b) {
+ pa_channel_position_mask_t am, bm;
+
+ pa_assert(a);
+ pa_assert(b);
+
+ pa_return_val_if_fail(pa_channel_map_valid(a), 0);
+
+ if (PA_UNLIKELY(a == b))
+ return 1;
+
+ pa_return_val_if_fail(pa_channel_map_valid(b), 0);
+
+ am = pa_channel_map_mask(a);
+ bm = pa_channel_map_mask(b);
+
+ return (bm & am) == bm;
+}
+
+int pa_channel_map_can_balance(const pa_channel_map *map) {
+ pa_channel_position_mask_t m;
+
+ pa_assert(map);
+ pa_return_val_if_fail(pa_channel_map_valid(map), 0);
+
+ m = pa_channel_map_mask(map);
+
+ return
+ (PA_CHANNEL_POSITION_MASK_LEFT & m) &&
+ (PA_CHANNEL_POSITION_MASK_RIGHT & m);
+}
+
+int pa_channel_map_can_fade(const pa_channel_map *map) {
+ pa_channel_position_mask_t m;
+
+ pa_assert(map);
+ pa_return_val_if_fail(pa_channel_map_valid(map), 0);
+
+ m = pa_channel_map_mask(map);
+
+ return
+ (PA_CHANNEL_POSITION_MASK_FRONT & m) &&
+ (PA_CHANNEL_POSITION_MASK_REAR & m);
+}
+
+const char* pa_channel_map_to_name(const pa_channel_map *map) {
+ pa_bitset_t in_map[PA_BITSET_ELEMENTS(PA_CHANNEL_POSITION_MAX)];
+ unsigned c;
+
+ pa_assert(map);
+
+ pa_return_val_if_fail(pa_channel_map_valid(map), NULL);
+
+ memset(in_map, 0, sizeof(in_map));
+
+ for (c = 0; c < map->channels; c++)
+ pa_bitset_set(in_map, map->map[c], true);
+
+ if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
+ PA_CHANNEL_POSITION_MONO, -1))
+ return "mono";
+
+ if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
+ PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, -1))
+ return "stereo";
+
+ if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
+ PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
+ PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, -1))
+ return "surround-40";
+
+ if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
+ PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
+ PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
+ PA_CHANNEL_POSITION_LFE, -1))
+ return "surround-41";
+
+ if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
+ PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
+ PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
+ PA_CHANNEL_POSITION_FRONT_CENTER, -1))
+ return "surround-50";
+
+ if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
+ PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
+ PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
+ PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE, -1))
+ return "surround-51";
+
+ if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
+ PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
+ PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
+ PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
+ PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT, -1))
+ return "surround-71";
+
+ return NULL;
+}
+
+const char* pa_channel_map_to_pretty_name(const pa_channel_map *map) {
+ pa_bitset_t in_map[PA_BITSET_ELEMENTS(PA_CHANNEL_POSITION_MAX)];
+ unsigned c;
+
+ pa_assert(map);
+
+ pa_return_val_if_fail(pa_channel_map_valid(map), NULL);
+
+ memset(in_map, 0, sizeof(in_map));
+
+ for (c = 0; c < map->channels; c++)
+ pa_bitset_set(in_map, map->map[c], true);
+
+ pa_init_i18n();
+
+ if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
+ PA_CHANNEL_POSITION_MONO, -1))
+ return _("Mono");
+
+ if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
+ PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, -1))
+ return _("Stereo");
+
+ if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
+ PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
+ PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, -1))
+ return _("Surround 4.0");
+
+ if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
+ PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
+ PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
+ PA_CHANNEL_POSITION_LFE, -1))
+ return _("Surround 4.1");
+
+ if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
+ PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
+ PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
+ PA_CHANNEL_POSITION_FRONT_CENTER, -1))
+ return _("Surround 5.0");
+
+ if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
+ PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
+ PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
+ PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE, -1))
+ return _("Surround 5.1");
+
+ if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
+ PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
+ PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
+ PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
+ PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT, -1))
+ return _("Surround 7.1");
+
+ 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;
+}
+
+pa_channel_position_mask_t pa_channel_map_mask(const pa_channel_map *map) {
+ unsigned c;
+ pa_channel_position_mask_t r = 0;
+
+ pa_return_val_if_fail(pa_channel_map_valid(map), 0);
+
+ for (c = 0; c < map->channels; c++)
+ r |= PA_CHANNEL_POSITION_MASK(map->map[c]);
+
+ return r;
+}