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-rw-r--r--src/map-file2
-rw-r--r--src/pulse/volume.c41
-rw-r--r--src/pulse/volume.h10
3 files changed, 51 insertions, 2 deletions
diff --git a/src/map-file b/src/map-file
index 4f20c48f..d6122a4a 100644
--- a/src/map-file
+++ b/src/map-file
@@ -131,6 +131,8 @@ pa_cvolume_init;
pa_cvolume_max;
pa_cvolume_max_mask;
pa_cvolume_merge;
+pa_cvolume_min;
+pa_cvolume_min_mask;
pa_cvolume_remap;
pa_cvolume_scale;
pa_cvolume_scale_mask;
diff --git a/src/pulse/volume.c b/src/pulse/volume.c
index d7fb2477..e3535726 100644
--- a/src/pulse/volume.c
+++ b/src/pulse/volume.c
@@ -126,7 +126,7 @@ pa_volume_t pa_cvolume_avg_mask(const pa_cvolume *a, const pa_channel_map *cm, p
}
pa_volume_t pa_cvolume_max(const pa_cvolume *a) {
- pa_volume_t m = 0;
+ pa_volume_t m = PA_VOLUME_MUTED;
unsigned c;
pa_assert(a);
@@ -139,8 +139,22 @@ pa_volume_t pa_cvolume_max(const pa_cvolume *a) {
return m;
}
+pa_volume_t pa_cvolume_min(const pa_cvolume *a) {
+ pa_volume_t m = (pa_volume_t) -1;
+ unsigned c;
+
+ pa_assert(a);
+ pa_return_val_if_fail(pa_cvolume_valid(a), PA_VOLUME_MUTED);
+
+ for (c = 0; c < a->channels; c++)
+ if (m == (pa_volume_t) -1 || a->values[c] < m)
+ m = a->values[c];
+
+ return m;
+}
+
pa_volume_t pa_cvolume_max_mask(const pa_cvolume *a, const pa_channel_map *cm, pa_channel_position_mask_t mask) {
- pa_volume_t m = 0;
+ pa_volume_t m = PA_VOLUME_MUTED;
unsigned c, n;
pa_assert(a);
@@ -162,6 +176,29 @@ pa_volume_t pa_cvolume_max_mask(const pa_cvolume *a, const pa_channel_map *cm, p
return m;
}
+pa_volume_t pa_cvolume_min_mask(const pa_cvolume *a, const pa_channel_map *cm, pa_channel_position_mask_t mask) {
+ pa_volume_t m = (pa_volume_t) -1;
+ unsigned c, n;
+
+ pa_assert(a);
+
+ if (!cm)
+ return pa_cvolume_min(a);
+
+ pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(a, cm), PA_VOLUME_MUTED);
+
+ for (c = n = 0; c < a->channels; c++) {
+
+ if (!(PA_CHANNEL_POSITION_MASK(cm->map[c]) & mask))
+ continue;
+
+ if (m == (pa_volume_t) -1 || a->values[c] < m)
+ m = a->values[c];
+ }
+
+ return m;
+}
+
pa_volume_t pa_sw_volume_multiply(pa_volume_t a, pa_volume_t b) {
return pa_sw_volume_from_linear(pa_sw_volume_to_linear(a) * pa_sw_volume_to_linear(b));
}
diff --git a/src/pulse/volume.h b/src/pulse/volume.h
index 3881da2f..349ca49f 100644
--- a/src/pulse/volume.h
+++ b/src/pulse/volume.h
@@ -195,6 +195,16 @@ pa_volume_t pa_cvolume_max(const pa_cvolume *a) PA_GCC_PURE;
* \since 0.9.16 */
pa_volume_t pa_cvolume_max_mask(const pa_cvolume *a, const pa_channel_map *cm, pa_channel_position_mask_t mask) PA_GCC_PURE;
+/** Return the minimum volume of all channels. \since 0.9.16 */
+pa_volume_t pa_cvolume_min(const pa_cvolume *a) PA_GCC_PURE;
+
+/** Return the minimum volume of all channels that are included in the
+ * specified channel map with the specified channel position mask. If
+ * cm is NULL this call is identical to pa_cvolume_min(). If no
+ * channel is selected the returned value will be PA_VOLUME_MUTED.
+ * \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 */
int pa_cvolume_valid(const pa_cvolume *v) PA_GCC_PURE;