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-rw-r--r--src/pulse/volume.h12
1 files changed, 8 insertions, 4 deletions
diff --git a/src/pulse/volume.h b/src/pulse/volume.h
index 14692b8d..3881da2f 100644
--- a/src/pulse/volume.h
+++ b/src/pulse/volume.h
@@ -213,11 +213,13 @@ int pa_cvolume_channels_equal_to(const pa_cvolume *a, pa_volume_t v) PA_GCC_PURE
pa_volume_t pa_sw_volume_multiply(pa_volume_t a, pa_volume_t b) PA_GCC_CONST;
/** Multiply two per-channel volumes and return the result in
- * *dest. This is only valid for software volumes! */
+ * *dest. This is only valid for software volumes! a, b and dest may
+ * point to the same structure. */
pa_cvolume *pa_sw_cvolume_multiply(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b);
/** Multiply a per-channel volume with a scalar volume and return the
- * result in *dest. This is only valid for software volumes! \since
+ * result in *dest. This is only valid for software volumes! a
+ * and dest may point to the same structure. \since
* 0.9.16 */
pa_cvolume *pa_sw_cvolume_multiply_scalar(pa_cvolume *dest, const pa_cvolume *a, pa_volume_t b);
@@ -228,11 +230,13 @@ pa_cvolume *pa_sw_cvolume_multiply_scalar(pa_cvolume *dest, const pa_cvolume *a,
pa_volume_t pa_sw_volume_divide(pa_volume_t a, pa_volume_t b) PA_GCC_CONST;
/** Divide two per-channel volumes and return the result in
- * *dest. This is only valid for software volumes! \since 0.9.13 */
+ * *dest. This is only valid for software volumes! a, b
+ * and dest may point to the same structure. \since 0.9.13 */
pa_cvolume *pa_sw_cvolume_divide(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b);
/** Divide a per-channel volume by a scalar volume and return the
- * result in *dest. This is only valid for software volumes! \since
+ * result in *dest. This is only valid for software volumes! a
+ * and dest may point to the same structure. \since
* 0.9.16 */
pa_cvolume *pa_sw_cvolume_divide_scalar(pa_cvolume *dest, const pa_cvolume *a, pa_volume_t b);